/* Química Analítica y Laboratorio Científico — estilos «liquid glass»
   (misma familia visual que la Tabla Periódica Científica).
   Tokens en :root; tema oscuro automático; diseños por dispositivo y orientación
   según el tamaño de la ventana (html[data-size], html[data-short]); modo ligero (.lite) sin desenfoques. */
:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-2: #e8eff6;
  --text: #161b20;
  --muted: #556270;
  --border: #d3dce6;
  --grid: #e3e9f0;
  --accent: #0b7dc6;
  --accent-t: #ffffff;
  --accent-2: #0a6eae;
  --accent-soft: #e2f0fa;
  --good: #1c7a44; --good-soft: #e1f2e7;
  --bad: #b42318; --bad-soft: #fbe6e3;
  --warn: #7a5300; --warn-soft: #fdf2d6;
  --sim: #6b3fb0; --sim-soft: #efe8f8;
  --c1: #0b7dc6; --c2: #e0631c; --c3: #14937f; --c4: #8a3fa6; --c5: #b08900; --c6: #5a6675;
  --hl: rgba(255, 255, 255, .85);
  --rim: rgba(178, 208, 255, .85);
  --sh: rgba(16, 40, 60, .16);
  --gsh: rgba(16, 40, 60, .16);
  --glass: color-mix(in srgb, var(--surface) 62%, transparent);
  --glass-strong: color-mix(in srgb, var(--surface) 82%, transparent);
  --spring: cubic-bezier(.34, 1.56, .64, 1);
  --radius: 18px;
  --nav-w: 292px;
  --font: Inter, "SF Pro Text", -apple-system, BlinkMacSystemFont, "Segoe UI Variable Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: Poppins, "SF Pro Display", -apple-system, "Segoe UI Variable Display", "Segoe UI", Roboto, Arial, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111519; --surface: #1a2027; --surface-2: #212932; --text: #e8edf2; --muted: #a0acb8;
    --border: #2f3943; --grid: #27313a; --accent: #7cc8f7; --accent-t: #07202f; --accent-2: #9ad5fa; --accent-soft: #17303f;
    --good: #6fd28f; --good-soft: #173526; --bad: #ff8a80; --bad-soft: #3d1d1a; --warn: #f0c96a; --warn-soft: #3a2f12;
    --sim: #c7aef0; --sim-soft: #2b2140;
    --c1: #7cc8f7; --c2: #f0935e; --c3: #5fd0b8; --c4: #c690de; --c5: #e3c25a; --c6: #a3b0bd;
    --hl: rgba(255, 255, 255, .22);
    --rim: rgba(150, 185, 255, .32);
    --sh: rgba(0, 0, 0, .55);
    --gsh: rgba(0, 0, 0, .55);
    --glass: color-mix(in srgb, var(--surface) 58%, transparent);
    --glass-strong: color-mix(in srgb, var(--surface) 80%, transparent);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #111519; --surface: #1a2027; --surface-2: #212932; --text: #e8edf2; --muted: #a0acb8;
  --border: #2f3943; --grid: #27313a; --accent: #7cc8f7; --accent-t: #07202f; --accent-2: #9ad5fa; --accent-soft: #17303f;
  --good: #6fd28f; --good-soft: #173526; --bad: #ff8a80; --bad-soft: #3d1d1a; --warn: #f0c96a; --warn-soft: #3a2f12;
  --sim: #c7aef0; --sim-soft: #2b2140;
  --c1: #7cc8f7; --c2: #f0935e; --c3: #5fd0b8; --c4: #c690de; --c5: #e3c25a; --c6: #a3b0bd;
  --hl: rgba(255, 255, 255, .22);
  --rim: rgba(150, 185, 255, .32);
  --sh: rgba(0, 0, 0, .55);
  --gsh: rgba(0, 0, 0, .55);
  --glass: color-mix(in srgb, var(--surface) 58%, transparent);
  --glass-strong: color-mix(in srgb, var(--surface) 80%, transparent);
  color-scheme: dark;
}

/* ---------- Base (comportamiento tipo aplicación nativa: sin selección de texto ni recuadro azul al tocar) ---------- */
* , *::before, *::after {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  user-select: none;
}
input, textarea {
  -webkit-user-select: text;
  user-select: text;
}
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; background: var(--bg); scroll-padding-top: 20px; overflow-x: hidden; overscroll-behavior-x: none; }
/* Fondo: patrón de dibujos de laboratorio + resplandores de color */
html::before {
  content: ""; position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background-size: 640px 640px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='640' height='640' viewBox='0 0 640 640'%3E%3Cg fill='none' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round' opacity='0.11'%3E%3Cg transform='translate(40 40) rotate(-12 30 30) scale(1.1)' stroke='%2314937f'%3E%3Cellipse cx='30' cy='30' rx='26' ry='10'/%3E%3Cellipse cx='30' cy='30' rx='26' ry='10' transform='rotate(60 30 30)'/%3E%3Cellipse cx='30' cy='30' rx='26' ry='10' transform='rotate(120 30 30)'/%3E%3Ccircle cx='30' cy='30' r='3' fill='%2314937f'/%3E%3C/g%3E%3Cg transform='translate(260 70) rotate(14 30 30) scale(0.95)' stroke='%230b7dc6'%3E%3Cpath d='M24 6h12M26 6v16L10 50a4 4 0 0 0 3.5 6h33a4 4 0 0 0 3.5-6L34 22V6'/%3E%3Cpath d='M16 42h28'/%3E%3C/g%3E%3Cg transform='translate(470 40) rotate(-8 30 30)' stroke='%230b7dc6'%3E%3Cpath d='M26 2v44M34 2v44M26 46l4 10 4-10'/%3E%3Cpath d='M26 12h4M26 20h4M26 28h4M26 36h4'/%3E%3C/g%3E%3Cg transform='translate(120 230) rotate(10 30 30) scale(0.9)' stroke='%2314937f'%3E%3Cpath d='M30 8l19 11v22L30 52 11 41V19z'/%3E%3Ccircle cx='30' cy='30' r='9'/%3E%3C/g%3E%3Cg transform='translate(340 250) rotate(-6 30 30) scale(0.95)' stroke='%230b7dc6'%3E%3Cpath d='M6 50h48M10 50V10M10 44l10-6 8-14 8-6 8-4 10-2'/%3E%3C/g%3E%3Cg transform='translate(540 270) rotate(12 30 30) scale(0.85)' stroke='%230b7dc6'%3E%3Cpath d='M14 8h32M16 8v42a4 4 0 0 0 4 4h20a4 4 0 0 0 4-4V8'/%3E%3Cpath d='M16 26h28M16 38h12'/%3E%3C/g%3E%3Cg transform='translate(30 430)' stroke='%2314937f'%3E%3Cpath d='M6 54h48M30 54V30M14 30h32l-6-22H20z'/%3E%3C/g%3E%3Cg transform='translate(230 450) rotate(-14 30 30)' stroke='%230b7dc6'%3E%3Ccircle cx='30' cy='26' r='9'/%3E%3Ccircle cx='9' cy='46' r='5'/%3E%3Ccircle cx='51' cy='46' r='5'/%3E%3Cpath d='M23 33l-10 9M37 33l10 9'/%3E%3C/g%3E%3Cg transform='translate(430 470) rotate(18 30 30) scale(0.9)' stroke='%230b7dc6'%3E%3Cpath d='M22 6h16M24 6v40a6 6 0 0 0 12 0V6'/%3E%3Cpath d='M24 28h12'/%3E%3C/g%3E%3Cg transform='translate(560 560) rotate(20 30 30) scale(0.7)' stroke='%2314937f'%3E%3Cellipse cx='30' cy='30' rx='26' ry='10'/%3E%3Cellipse cx='30' cy='30' rx='26' ry='10' transform='rotate(60 30 30)'/%3E%3Cellipse cx='30' cy='30' rx='26' ry='10' transform='rotate(120 30 30)'/%3E%3Ccircle cx='30' cy='30' r='3' fill='%2314937f'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
body {
  margin: 0; color: var(--text); background: none; min-height: 100vh; min-height: 100dvh; overflow-x: hidden;
  font: 15px/1.5 var(--font); display: flex; flex-direction: column;
  padding-left: env(safe-area-inset-left, 0px); padding-right: env(safe-area-inset-right, 0px);
}
a { color: var(--accent-2); }
h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 .5em; }
h1 { font: 700 1.6rem/1.15 var(--font-display); letter-spacing: -.01em; }
h2 { font: 700 1.2rem/1.25 var(--font-display); }
h3 { font-size: 1.04rem; font-weight: 700; }
h4 { font-size: .78rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin-top: 1em; }
p { margin: 0 0 .8em; }
.muted { color: var(--muted); }
.small { font-size: .86rem; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -999px; top: 0; background: var(--accent); color: var(--accent-t); padding: 8px 12px; z-index: 3000; border-radius: 99px; }
.skip:focus { left: 8px; top: 8px; }
:focus, :focus-visible, button:focus, button:focus-visible, a:focus, a:focus-visible, summary:focus, summary:focus-visible, .gsel-btn:focus-visible { outline: none !important; }

/* ---------- Superficies y cápsulas «Liquid Glass» ---------- */
.glass, .toolpill, .search input, .tool-tabs, .btn:not(.primary), .seg, .search-res, .chart-tip {
  background: linear-gradient(155deg, color-mix(in srgb, var(--hl) 36%, transparent) 0%, transparent 50%, color-mix(in srgb, var(--accent) 10%, transparent) 100%), var(--glass);
  -webkit-backdrop-filter: blur(16px) saturate(1.75); backdrop-filter: blur(16px) saturate(1.75);
  border: 1px solid color-mix(in srgb, var(--hl) 50%, color-mix(in srgb, var(--text) 12%, transparent));
  box-shadow: inset 0 1.5px 1px var(--hl), inset 0 -1.5px 2px color-mix(in srgb, var(--hl) 72%, transparent),
    inset 3px 3px 8px -3px var(--hl), inset -3px -4px 9px -4px color-mix(in srgb, var(--accent) 40%, transparent),
    0 1px 0 color-mix(in srgb, var(--hl) 60%, transparent), 0 6px 16px -2px color-mix(in srgb, var(--text) 12%, transparent);
}
.panel, .tool, .hero, .card, .result, .exercise, .tile, .ghs, .nb-list, .doc-card {
  background: linear-gradient(160deg, color-mix(in srgb, var(--hl) 24%, transparent), transparent 42%), var(--glass-strong);
  -webkit-backdrop-filter: blur(16px) saturate(1.4); backdrop-filter: blur(16px) saturate(1.4);
  border: 1px solid color-mix(in srgb, var(--text) 8%, transparent);
  border-radius: var(--radius);
  box-shadow: inset 0 1px 1px var(--hl), 0 10px 30px color-mix(in srgb, var(--sh) 55%, transparent), 0 2px 6px rgba(0, 0, 0, .04);
}

/* ---------- Encabezado ---------- */
.app-header { position: relative; z-index: 30; padding: 14px 18px 4px; }
.topbar { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 12px; }
/* La píldora de menú vive fuera del encabezado para quedar sobre el cajón y el velo */
.toolpill { position: absolute; top: 22px; left: max(18px, env(safe-area-inset-left)); z-index: 2200; display: inline-flex; align-items: center; gap: 2px; padding: 4px 6px; border-radius: 999px; user-select: none; -webkit-user-select: none; }
.tp-space { height: 44px; }
.toolpill button { width: 38px; height: 34px; border: 0; background: none; border-radius: 999px; color: var(--text); cursor: pointer; display: grid; place-items: center; -webkit-user-drag: none; transition: background .2s, transform .25s var(--spring); }
.toolpill button:hover { background: color-mix(in srgb, var(--text) 7%, transparent); }
.toolpill button:active { transform: scale(.9); }
.toolpill svg { width: 18px; height: 18px; }
.toolpill button:disabled { opacity: .35; cursor: default; background: none; transform: none; }
.toolpill .ic-open, body.nav-open .toolpill .ic-closed { display: none; }
body.nav-open .toolpill .ic-open { display: block; }
/* Menú cerrado: tres rayitas + flechas · menú abierto: barra lateral + flechas */
.tp-space { width: 131px; }
.brand { display: flex; align-items: center; gap: 14px; text-decoration: none; color: var(--text); min-width: 0; }
.brand .logo { flex: none; width: 58px; height: 58px; border-radius: 18px; display: grid; place-items: center; }
.brand .logo svg { width: 46px; height: 46px; }
.brand-txt { display: flex; flex-direction: column; line-height: 1.05; }
.brand-txt strong { font: 600 2rem/1.05 var(--font-display); letter-spacing: -.02em; }
.brand-txt small { color: var(--muted); font-size: .9rem; margin-top: 3px; }
/* El buscador solo aparece en la página de inicio */
body:not(.is-home) .searchrow { display: none; }
/* Buscador centrado y de ancho contenido (no ocupa toda la pantalla) */
.searchrow { width: 100%; max-width: 600px; margin: 14px auto 0; }
.search { position: relative; }
.search input { width: 100%; min-height: 44px; border-radius: 999px; padding: 8px 20px; font: inherit; color: var(--text);
  box-shadow: inset 0 1.5px 1px var(--hl), inset 2px 3px 8px -4px color-mix(in srgb, var(--text) 14%, transparent), inset 0 0 0 1px color-mix(in srgb, var(--text) 8%, transparent), 0 5px 12px color-mix(in srgb, var(--text) 10%, transparent); }
.search-res { position: absolute; left: 0; right: 0; top: calc(100% + 6px); border-radius: 18px; list-style: none; margin: 0; padding: 6px; max-height: 60vh; overflow: auto; z-index: 60; background: var(--glass-strong); }
.search-res li.muted { padding: 8px 12px; }
.search-res a { display: block; padding: 9px 12px; border-radius: 12px; text-decoration: none; color: var(--text); }
.search-res a:hover, .search-res a:focus { background: color-mix(in srgb, var(--accent) 12%, transparent); outline: none; }

/* ---------- Disposición y cajón lateral ---------- */
.layout { display: flex; flex: 1; width: 100%; }
main { flex: 1; min-width: 0; max-width: 1240px; margin: 0 auto; width: 100%; padding: 14px 18px 48px; outline: none; }
.app-nav {
  position: fixed; top: 0; bottom: 0; left: 0; width: var(--nav-w); z-index: 2150; overflow-y: auto; overscroll-behavior: contain;
  padding: 14px 12px 18px; background: var(--surface);
  box-shadow: 12px 0 40px rgba(10, 15, 25, .25);
  transform: translateX(-105%); visibility: hidden;
  transition: transform .32s cubic-bezier(.22, 1, .36, 1), box-shadow .32s, visibility 0s .32s;
}
body.nav-open .app-nav { transform: none; visibility: visible; transition: transform .32s cubic-bezier(.22, 1, .36, 1), box-shadow .32s, visibility 0s; }
.scrim { position: fixed; inset: 0; z-index: 2140; background: rgba(10, 15, 25, .35); opacity: 0; pointer-events: none; transition: opacity .3s;
  -webkit-backdrop-filter: blur(3px); backdrop-filter: blur(3px); }
body.nav-open:not(.docked) .scrim { opacity: 1; pointer-events: auto; }
/* Con el menú abierto la píldora está dentro del cajón y se desplaza con su contenido */
body .app-nav .toolpill { position: relative; top: auto; left: auto; z-index: 1; margin: 0 0 10px; }
/* Con el menú abierto, la píldora se funde con el cajón (sin vidrio propio) */
body.nav-open .toolpill { background: none; border-color: transparent; box-shadow: none; -webkit-backdrop-filter: none; backdrop-filter: none; }
/* Sin barra de desplazamiento visible en el cajón (sigue siendo desplazable) */
.app-nav { scrollbar-width: none; -ms-overflow-style: none; }
.app-nav::-webkit-scrollbar { display: none; width: 0; height: 0; }
/* Escritorio: cajón acoplado */
body.docked.nav-open { padding-left: var(--nav-w); }
body.docked .app-nav { box-shadow: 1px 0 0 var(--border); background: color-mix(in srgb, var(--surface) 88%, transparent); -webkit-backdrop-filter: blur(18px) saturate(1.4); backdrop-filter: blur(18px) saturate(1.4); }
body.docked.nav-open .app-header { padding-left: 18px; }

.dsec-h { margin: 10px 8px 6px; font: 700 11.5px/1 var(--font); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.dopts { padding: 0 4px 12px; margin-bottom: 8px; border-bottom: 1px solid var(--border); }
/* Control segmentado con «lente» deslizante */
.seg { position: relative; isolation: isolate; display: flex; padding: 3px; border-radius: 999px; margin: 0 0 10px; background: var(--surface-2);
  box-shadow: inset 0 1.5px 2.5px rgba(20, 30, 50, .09), 0 0 0 1px color-mix(in srgb, var(--text) 6%, transparent); border: 0; -webkit-backdrop-filter: none; backdrop-filter: none; user-select: none; -webkit-user-select: none; touch-action: pan-y; }
.seg button { position: relative; z-index: 1; flex: 1 1 auto; min-width: 0; min-height: 34px; padding: 0 8px; border: 0; background: none; border-radius: 999px; color: var(--muted); font: 600 12px var(--font); letter-spacing: -.01em; white-space: nowrap; cursor: pointer; -webkit-user-drag: none; transition: color .2s ease, transform .25s var(--spring); }
.seg button:hover { color: var(--text); }
.seg button:active { transform: scale(.94); }
.seg button[aria-checked="true"] { color: var(--text); text-shadow: 0 0 .35px currentColor; }

/* Cápsula líquida (.lens): gota óptica con cáusticas internas, dispersión cromática y «liquid bloom» */
.lens {
  position: absolute; z-index: 0; top: 0; left: 0; width: 0; height: 0; border-radius: 999px; pointer-events: none;
  will-change: transform, width, height; transform-origin: 50% 50%;
  background:
    radial-gradient(110% 130% at var(--lx, 50%) var(--ly, 24%), color-mix(in srgb, var(--hl) 90%, transparent), transparent 60%),
    linear-gradient(180deg, color-mix(in srgb, var(--hl) 70%, transparent) 0%, transparent 56%, color-mix(in srgb, var(--accent) 15%, transparent) 100%),
    color-mix(in srgb, var(--accent) 14%, color-mix(in srgb, var(--surface) 84%, transparent));
  -webkit-backdrop-filter: blur(8px) saturate(1.8); backdrop-filter: blur(8px) saturate(1.8);
  box-shadow:
    inset 0 2px 1.2px var(--hl),
    inset 0 -1.5px 2px color-mix(in srgb, var(--hl) 70%, transparent),
    inset 2.5px 0 3px -1px color-mix(in srgb, var(--c1) calc(16% + var(--l-vel, 0) * 30%), transparent),
    inset -2.5px 0 3px -1px color-mix(in srgb, var(--c2) calc(12% + var(--l-vel, 0) * 26%), transparent),
    inset 0 0 0 1px color-mix(in srgb, var(--hl) 65%, color-mix(in srgb, var(--accent) 20%, transparent)),
    inset 0 -6px 12px -7px color-mix(in srgb, var(--accent) 32%, transparent),
    0 4px 14px -2px color-mix(in srgb, var(--accent) 26%, transparent);
  transition: box-shadow .2s ease, background-color .2s ease;
}
.lens.bloom {
  background:
    radial-gradient(120% 140% at var(--lx, 50%) var(--ly, 22%), var(--hl), transparent 64%),
    linear-gradient(180deg, color-mix(in srgb, var(--hl) 82%, transparent) 0%, transparent 50%, color-mix(in srgb, var(--accent) 22%, transparent) 100%),
    color-mix(in srgb, var(--accent) 18%, color-mix(in srgb, var(--surface) 74%, transparent));
  box-shadow:
    inset 0 2.5px 2px var(--hl),
    inset 0 -2px 3px color-mix(in srgb, var(--hl) 85%, transparent),
    inset 3.5px 0 5px -1px color-mix(in srgb, var(--c1) 40%, transparent),
    inset -3.5px 0 5px -1px color-mix(in srgb, var(--c2) 34%, transparent),
    inset 0 0 0 1.2px var(--hl),
    0 8px 22px -3px color-mix(in srgb, var(--accent) 38%, transparent);
}

/* Lista de módulos con submenús desplegables */
.navlist { list-style: none; margin: 0; padding: 0; }
.navlist > li { position: relative; }
.navlist > li + li::before { content: ""; position: absolute; top: 0; left: 14px; right: 14px; height: 1px; background: var(--border); }
.navlist > li:has(> .nav-row [aria-current="page"])::before, .navlist > li:has(> .nav-row [aria-current="page"]) + li::before { opacity: 0; }
.nav-row { display: flex; align-items: center; border-radius: 14px; transition: background .2s; }
.nav-row:hover { background: var(--surface-2); }
.nav-row a { flex: 1; display: flex; gap: 10px; align-items: center; min-height: 44px; padding: 0 6px 0 12px; color: var(--text); text-decoration: none; font: 600 14.5px var(--font); }
.nav-row a[aria-current="page"] { color: var(--accent); font-weight: 700; }
.nav-row:has(a[aria-current="page"]) { background: var(--surface-2); }
.nav-row .ico { width: 22px; height: 22px; flex: none; display: grid; place-items: center; color: var(--muted); transition: color .2s; }
.nav-row .ico svg { width: 20px; height: 20px; }
.nav-row a:hover .ico { color: var(--text); }
.nav-row a[aria-current="page"] .ico { color: var(--accent); }
/* Iconos de módulo en tarjetas de inicio y encabezados */
.card h2 a { display: flex; align-items: center; gap: 10px; }
.card-ic, .head-ic { flex: none; display: grid; place-items: center; color: var(--accent); }
.card-ic { width: 38px; height: 38px; border-radius: 12px; }
.card-ic svg { width: 22px; height: 22px; }
.mod-head h1 { display: flex; align-items: center; justify-content: center; gap: 12px; text-align: center; }
.head-ic { width: 44px; height: 44px; border-radius: 14px; }
.head-ic svg { width: 26px; height: 26px; }
.nav-tog { flex: none; width: 38px; height: 38px; border: 0; background: none; border-radius: 12px; color: var(--muted); cursor: pointer; display: grid; place-items: center; transition: background .2s; }
.nav-tog:hover { background: color-mix(in srgb, var(--text) 7%, transparent); color: var(--text); }
.nav-tog svg { width: 16px; height: 16px; transition: transform .3s var(--spring); }
.nav-tog[aria-expanded="true"] svg { transform: rotate(90deg); }
.subnav { list-style: none; margin: 2px 0 8px 32px; padding: 0 0 0 10px; border-left: 2px solid color-mix(in srgb, var(--accent) 30%, var(--border)); display: grid; gap: 1px; }
.subnav[hidden] { display: none; }
.subnav a { display: block; padding: 7px 10px; border-radius: 10px; color: var(--muted); text-decoration: none; font-size: 13.5px; }
.subnav a:hover { background: var(--surface-2); color: var(--text); }
.subnav a[aria-current="page"] { color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, transparent); font-weight: 600; }
.nav-foot { margin: 16px 8px 0; }

/* "Más herramientas" al final del menú lateral (Química Orgánica y Tabla Periódica) */
#sbMore {
  margin-top: 14px;
  padding: 12px 2px 4px;
  border-top: 1px solid var(--border);
}
#sbMore .sbh {
  margin: 4px 8px 8px;
  font: 700 11px/1 var(--font);
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--muted);
}
.more-link {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 48px;
  padding: 6px 10px;
  margin-bottom: 4px;
  border-radius: 13px;
  color: var(--text);
  text-decoration: none;
  font: 600 13.5px/1.25 var(--font);
  transition: background .2s ease, transform .2s var(--spring);
}
.more-link:hover {
  background: var(--surface-2);
  transform: translateX(2px);
}
.more-link:active {
  transform: scale(.98);
}
.more-ico {
  width: 32px;
  height: 32px;
  flex: 0 0 32px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  background: var(--surface-2);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .35), 0 2px 6px rgba(10, 20, 40, .06);
  border: 1px solid var(--border);
  transition: transform .22s var(--spring), box-shadow .22s ease;
}
.more-link:hover .more-ico {
  transform: scale(1.05);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .55), 0 4px 10px rgba(10, 20, 40, .12);
}
.organica-ico {
  color: #0e8059;
  background: color-mix(in srgb, #0e8059 12%, var(--surface-2));
  border-color: color-mix(in srgb, #0e8059 28%, var(--border));
}
[data-theme="dark"] .organica-ico {
  color: #3ec28c;
  background: color-mix(in srgb, #3ec28c 14%, var(--surface-2));
  border-color: color-mix(in srgb, #3ec28c 32%, var(--border));
}
.periodica-ico {
  color: #0b7dc6;
  background: color-mix(in srgb, #0b7dc6 12%, var(--surface-2));
  border-color: color-mix(in srgb, #0b7dc6 28%, var(--border));
}
[data-theme="dark"] .periodica-ico {
  color: #7cc8f7;
  background: color-mix(in srgb, #7cc8f7 14%, var(--surface-2));
  border-color: color-mix(in srgb, #7cc8f7 32%, var(--border));
}
.more-ico svg {
  width: 20px;
  height: 20px;
}
.more-meta {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
}
.more-t {
  display: block;
  font-weight: 600;
  font-size: 13.5px;
  line-height: 1.22;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.more-host {
  display: block;
  font: 400 11px/1.3 var(--font);
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.more-arr {
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  display: grid;
  place-items: center;
  color: var(--muted);
  opacity: .6;
  transition: transform .2s ease, opacity .2s ease, color .2s ease;
}
.more-arr svg {
  width: 14px;
  height: 14px;
}
.more-link:hover .more-arr {
  opacity: 1;
  color: var(--text);
  transform: translate(2px, -2px);
}
.nav-open-anim .subnav:not([hidden]) { animation: panelIn .22s cubic-bezier(.22, 1, .36, 1); }
@keyframes panelIn { from { opacity: 0; transform: translate3d(0, 6px, 0); } }
@keyframes viewIn { from { opacity: .01; } to { opacity: 1; } }
@keyframes toolBodyIn { from { opacity: 0; transform: translate3d(0, 8px, 0); } to { opacity: 1; transform: translate3d(0, 0, 0); } }
.view { animation: viewIn .24s cubic-bezier(.22, 1, .36, 1) both; }

/* Pie de página minimalista: solo el logotipo */
.app-footer { display: flex; justify-content: center; padding: 22px 18px 26px; }
.foot-brand { display: inline-flex; align-items: center; gap: 9px; color: var(--muted); text-decoration: none; opacity: .75; transition: opacity .2s, color .2s; }
.foot-brand:hover { opacity: 1; color: var(--accent); }
.foot-brand svg { width: 26px; height: 26px; }
.foot-word { font: 500 .95rem/1 var(--font-display); letter-spacing: -.01em; }
.foot-word b { font-weight: 700; margin-left: .28em; }
body.docked.nav-open .app-footer { margin-left: 0; }

/* ---------- Inicio: Cuadrícula Bento Liquid Glass (Estética Química Orgánica) ---------- */
.qhGrid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
  margin: 10px auto;
  align-items: stretch;
  width: 100%;
  max-width: 1240px;
  box-sizing: border-box;
}

/* Tarjeta horizontal/Bento con estructura fija: Icono + Cuerpo + Flecha */
.qhCard {
  position: relative;
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr) 28px;
  align-items: start;
  column-gap: 13px;
  row-gap: 8px;
  min-height: 118px;
  padding: 15px 16px;
  border-radius: 22px;
  cursor: pointer;
  text-align: left;
  color: var(--text);
  font: inherit;
  box-sizing: border-box;
  text-decoration: none;
  border: 1px solid color-mix(in srgb, var(--text) 9%, transparent);
  background: linear-gradient(165deg, color-mix(in srgb, var(--hl) 72%, transparent), color-mix(in srgb, var(--hl) 14%, transparent) 52%, color-mix(in srgb, var(--rim) 20%, transparent)), var(--surface);
  box-shadow: inset 1.5px 1.5px 1px var(--hl), inset -1px -1px 1px color-mix(in srgb, var(--hl) 45%, transparent), inset 0 -8px 12px -7px var(--rim), 0 8px 22px -8px var(--gsh);
  transition: transform .42s var(--spring), box-shadow .28s ease, border-color .25s ease;
  animation: qhIn .42s cubic-bezier(.22, 1, .36, 1) both;
  -webkit-tap-highlight-color: transparent;
  outline: none;
}
.qhCard:hover {
  transform: translate3d(0, -2px, 0) scale(1.01);
  border-color: color-mix(in srgb, var(--accent) 35%, transparent);
  box-shadow: inset 1.5px 1.5px 1px var(--hl), inset 0 -8px 12px -7px var(--rim), 0 14px 28px -10px var(--gsh);
}
.qhCard:active {
  transform: scale(.975);
  transition-duration: .1s;
}
.qhCard:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 45%, transparent);
  outline-offset: 3px;
}

/* Icono de cristal líquido a la izquierda */
.qhIco {
  grid-column: 1;
  grid-row: 1;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  color: var(--accent);
  flex: none;
  background: linear-gradient(180deg, rgba(255, 255, 255, .72), rgba(255, 255, 255, .12) 55%, rgba(255, 255, 255, .32)), color-mix(in srgb, var(--accent) 16%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  box-shadow: inset 1.5px 1.5px 1px rgba(255, 255, 255, .85), inset 0 -6px 9px -6px var(--rim), 0 4px 12px color-mix(in srgb, var(--accent) 16%, transparent);
}
.qhIco svg {
  width: 24px;
  height: 24px;
}

/* Cuerpo central: título + insignia + descripción acotada a 2 líneas */
.qhBody {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}
.qhHead {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  min-width: 0;
}
.qhCard b {
  font: 700 16px/1.22 var(--font-display);
  color: var(--text);
  letter-spacing: -.01em;
}
.qhCard small {
  color: var(--muted);
  font: 400 13px/1.38 var(--font);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0;
}

/* Insignia de estado (Última usada) */
.qhLast {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 999px;
  font: 700 10.5px/1.2 var(--font);
  letter-spacing: .02em;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 32%, transparent);
  white-space: nowrap;
}

/* Flecha circular a la derecha */
.qhArr {
  grid-column: 3;
  grid-row: 1;
  align-self: center;
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 999px;
  color: var(--accent);
  background: color-mix(in srgb, var(--text) 5%, transparent);
  border: 1px solid color-mix(in srgb, var(--text) 8%, transparent);
  transition: transform .25s var(--spring), background .2s, border-color .2s;
}
.qhArr svg {
  width: 15px;
  height: 15px;
}
.qhCard:hover .qhArr {
  background: color-mix(in srgb, var(--accent) 15%, transparent);
  border-color: color-mix(in srgb, var(--accent) 35%, transparent);
  transform: translateX(2px);
}

/* Fila inferior de accesos directos (cápsulas en 1 sola línea) */
.qhChips {
  grid-column: 1 / -1;
  grid-row: 2;
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: 5px;
  padding-top: 6px;
  margin-top: auto;
  border-top: 1px solid color-mix(in srgb, var(--text) 7%, transparent);
  overflow: hidden;
  width: 100%;
}
.qhChip {
  display: inline-flex;
  align-items: center;
  flex: 0 1 auto;
  min-width: 0;
  padding: 3px 9px;
  border-radius: 999px;
  font: 600 11.5px/1.2 var(--font);
  color: var(--muted);
  background: color-mix(in srgb, var(--text) 5%, transparent);
  border: 1px solid color-mix(in srgb, var(--text) 9%, transparent);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-decoration: none;
  cursor: pointer;
  transition: background .2s ease, border-color .2s ease, color .2s ease;
}
.qhChip:hover {
  background: color-mix(in srgb, var(--accent) 16%, transparent);
  border-color: color-mix(in srgb, var(--accent) 38%, transparent);
  color: var(--accent);
}
.qhChip.qhMore {
  flex: 0 0 auto;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  border-color: color-mix(in srgb, var(--accent) 25%, transparent);
}
.qhLvl {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

/* Sección "Más herramientas" en el Inicio (Bento Liquid Glass) */
.qhMoreSec {
  margin: 32px auto 14px;
  max-width: 1240px;
  width: 100%;
  box-sizing: border-box;
}
.qhMoreTitle {
  margin: 0 0 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 5px;
}
.qhMoreTitleTxt {
  font: 700 18.5px/1.2 var(--font-display);
  letter-spacing: -.02em;
  color: var(--text);
}
.qhMoreTitleSub {
  font: 400 13px/1.35 var(--font);
  color: var(--muted);
  max-width: 620px;
}
.qhMoreGrid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  width: 100%;
  box-sizing: border-box;
}
.qhCardExt {
  border-color: color-mix(in srgb, var(--rim) 90%, transparent);
}
.qhCardExt.ext-organica:hover {
  border-color: color-mix(in srgb, #0e8059 45%, var(--rim));
  box-shadow: 0 12px 32px rgba(14, 128, 89, .14), var(--gsh);
}
[data-theme="dark"] .qhCardExt.ext-organica:hover {
  border-color: color-mix(in srgb, #3ec28c 45%, var(--rim));
  box-shadow: 0 12px 32px rgba(62, 194, 140, .18), var(--gsh);
}
.qhCardExt.ext-periodica:hover {
  border-color: color-mix(in srgb, #0b7dc6 45%, var(--rim));
  box-shadow: 0 12px 32px rgba(11, 125, 198, .14), var(--gsh);
}
[data-theme="dark"] .qhCardExt.ext-periodica:hover {
  border-color: color-mix(in srgb, #7cc8f7 45%, var(--rim));
  box-shadow: 0 12px 32px rgba(124, 200, 247, .18), var(--gsh);
}
.qhBadgeExt {
  font-weight: 600;
  font-size: 11px;
  letter-spacing: .02em;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--muted);
  border: 1px solid var(--border);
}
.qhCardExt.ext-organica .qhBadgeExt {
  color: #0e8059;
  background: color-mix(in srgb, #0e8059 10%, transparent);
  border-color: color-mix(in srgb, #0e8059 25%, transparent);
}
[data-theme="dark"] .qhCardExt.ext-organica .qhBadgeExt {
  color: #3ec28c;
  background: color-mix(in srgb, #3ec28c 12%, transparent);
  border-color: color-mix(in srgb, #3ec28c 25%, transparent);
}
.qhCardExt.ext-periodica .qhBadgeExt {
  color: #0b7dc6;
  background: color-mix(in srgb, #0b7dc6 10%, transparent);
  border-color: color-mix(in srgb, #0b7dc6 25%, transparent);
}
[data-theme="dark"] .qhCardExt.ext-periodica .qhBadgeExt {
  color: #7cc8f7;
  background: color-mix(in srgb, #7cc8f7 12%, transparent);
  border-color: color-mix(in srgb, #7cc8f7 25%, transparent);
}
.qhHost {
  display: block;
  font: 600 11.5px/1.3 var(--font);
  color: var(--muted);
  margin-top: 6px;
  opacity: .85;
}
.qhArrExt {
  color: var(--muted);
}
.qhCardExt:hover .qhArrExt {
  transform: translate(2px, -2px);
  color: var(--text);
}

@keyframes qhIn {
  from { opacity: 0; transform: translate3d(0, 10px, 0) scale(.99); }
  to { opacity: 1; transform: none; }
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .qhIco {
    background: linear-gradient(180deg, rgba(255, 255, 255, .2), rgba(255, 255, 255, .02) 55%, rgba(255, 255, 255, .08)), color-mix(in srgb, var(--accent) 26%, transparent);
    box-shadow: inset 1px 1px 1px rgba(255, 255, 255, .28), inset 0 -6px 9px -6px var(--rim);
  }
}
:root[data-theme="dark"] .qhIco {
  background: linear-gradient(180deg, rgba(255, 255, 255, .2), rgba(255, 255, 255, .02) 55%, rgba(255, 255, 255, .08)), color-mix(in srgb, var(--accent) 26%, transparent);
  box-shadow: inset 1px 1px 1px rgba(255, 255, 255, .28), inset 0 -6px 9px -6px var(--rim);
}

/* Tarjetas y accesos genéricos */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }
.card { padding: 18px 20px; text-align: center; display: flex; flex-direction: column; align-items: center; transition: transform .3s var(--spring), box-shadow .3s; }
.card:hover { transform: translateY(-2px); }
.card h2 { font-size: 1.06rem; }
.card h2 a { color: var(--text); text-decoration: none; justify-content: center; }
.card h2 a:hover { color: var(--accent-2); }
.quick { margin: 4px 0 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; justify-content: center; gap: 5px 12px; font-size: .88rem; }

/* ---------- Módulos y herramientas ---------- */
.mod-head h1 { margin: 6px 0 12px; }
/* Pestañas secundarias: píldora centrada, del ancho de su contenido; si no caben, se desplazan */
.tool-tabs { position: relative; isolation: isolate; display: flex; gap: 4px; padding: 5px; border-radius: 999px; margin: 0 auto 20px; overflow-x: auto; scrollbar-width: none; width: fit-content; max-width: 100%; user-select: none; -webkit-user-select: none; touch-action: pan-x; }
.tool-tabs::-webkit-scrollbar { display: none; }
.tab { position: relative; z-index: 1; flex: none; padding: 8px 16px; border-radius: 999px; text-decoration: none; color: var(--muted); font-weight: 600; font-size: .9rem; white-space: nowrap; -webkit-user-drag: none; user-select: none; -webkit-user-select: none; cursor: pointer; transition: color .2s ease, transform .25s var(--spring); }
.tab:hover { color: var(--text); }
.tab:active { transform: scale(.95); }
.tab[aria-current="page"] { color: var(--text); text-shadow: 0 0 .35px currentColor; }
/* Panel de la herramienta centrado y con ancho máximo cómodo de lectura */
.tool { padding: 22px 26px; max-width: 1040px; margin-inline: auto; text-align: center; transition: height .28s cubic-bezier(.22, 1, .36, 1); }
.tool.nb-tool { max-width: 1120px; }
.tool-body.is-swapping { animation: toolBodyIn .24s cubic-bezier(.22, 1, .36, 1) both; }
.mod-body { max-width: 1240px; margin-inline: auto; text-align: center; }
.tool h2, .tool h3, .tool h4, .mod-body h2, .mod-body h3, .mod-body h4 { text-align: center; }
.tool > ul, .tool-body > ul, .mod-body > ul { max-width: 74ch; margin: 6px auto 14px; padding-left: 20px; text-align: left; }
.intro { color: var(--muted); max-width: 76ch; margin: 0 auto 14px; text-align: center; }
.note { background: color-mix(in srgb, var(--accent) 10%, transparent); border-radius: 12px; padding: 8px 14px; font-size: .9rem; max-width: 78ch; margin: 8px auto; text-align: center; }
.sub { margin-top: 22px; border-top: 1px solid var(--border); padding-top: 18px; text-align: center; }
.loading { padding: 20px 0; text-align: center; }

/* ---------- Formularios ---------- */
.fields { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px 18px; max-width: 920px; margin-inline: auto; }
.field { flex: 1 1 250px; max-width: 340px; width: 100%; margin-inline: auto; display: flex; flex-direction: column; align-items: center; text-align: center; gap: 5px; min-width: 0; }
.field.wide { flex: 1 1 100%; max-width: 720px; margin-inline: auto; }
.field label { font-weight: 600; font-size: .86rem; text-align: center; width: 100%; }
.field.check { flex: 1 1 100%; max-width: 680px; margin-inline: auto; align-items: center; }
.field.check .input-row { align-items: center; justify-content: center; gap: 8px; width: auto; }
.field.check label { font-weight: 500; width: auto; }
.opt { font-weight: 400; color: var(--muted); }
.input-row { display: flex; justify-content: center; align-items: center; gap: 6px; width: 100%; min-width: 0; }
.input-row > input:not([type=checkbox]):not([type=radio]), .input-row > select:not(.unit), .input-row > .gsel:not(.unit), .input-row > textarea { flex: 1; min-width: 0; }
/* Campos de texto de vidrio (cavidad con brillo interior, como el buscador de la Tabla Periódica) */
input[type=text], input[type=search], input[type=number], select, textarea {
  font: inherit; color: var(--text); text-align: center; border: 1px solid transparent; border-radius: 14px; padding: 8px 12px; min-height: 40px;
  background: radial-gradient(120% 90% at 30% 0%, color-mix(in srgb, var(--hl) 30%, transparent), transparent 55%), color-mix(in srgb, var(--surface) 55%, transparent);
  box-shadow: inset 0 1.5px 1px var(--hl), inset 2px 3px 8px -4px color-mix(in srgb, var(--text) 16%, transparent),
    inset 0 0 0 1px color-mix(in srgb, var(--text) 10%, transparent), 0 1px 0 color-mix(in srgb, var(--hl) 60%, transparent);
  transition: box-shadow .2s, background-color .2s;
}
input:hover, select:hover, textarea:hover { box-shadow: inset 0 1.5px 1px var(--hl), inset 2px 3px 8px -4px color-mix(in srgb, var(--text) 16%, transparent), inset 0 0 0 1px color-mix(in srgb, var(--text) 22%, transparent); }
input:focus-visible, select:focus-visible, textarea:focus-visible { outline: none; box-shadow: inset 0 1.5px 1px var(--hl), inset 0 0 0 1.5px var(--accent), 0 0 0 4px color-mix(in srgb, var(--accent) 20%, transparent); }
textarea { width: 100%; resize: vertical; font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: .88rem; text-align: center; }
select.unit { flex: none; max-width: 46%; }

/* ---------- Desplegables «liquid glass» (botón como en la Tabla Periódica + lista de vidrio) ---------- */
.gsel { position: relative; display: inline-flex; justify-content: center; min-width: 0; vertical-align: middle; }
.gsel.unit { flex: none; max-width: 46%; }
.gsel-native { position: absolute !important; inset: 0; opacity: 0; pointer-events: none; width: 100% !important; min-height: 0 !important; }
.gsel-btn { position: relative; display: inline-flex; align-items: center; justify-content: center; width: 100%; min-width: 0; min-height: 40px; padding: 0 32px; border: 1px solid transparent; border-radius: 999px;
  font: 600 .9rem var(--font); color: var(--text); text-align: center; cursor: pointer;
  background: radial-gradient(120% 90% at 30% 0%, color-mix(in srgb, var(--hl) 38%, transparent), transparent 55%),
    linear-gradient(color-mix(in srgb, var(--hl) 16%, transparent), transparent 45%, color-mix(in srgb, var(--accent) 8%, transparent) 100%), var(--glass);
  -webkit-backdrop-filter: blur(12px) saturate(1.7); backdrop-filter: blur(12px) saturate(1.7);
  box-shadow: inset 0 1.5px 1px var(--hl), inset 0 -1.5px 2px color-mix(in srgb, var(--hl) 65%, transparent), inset 3px 3px 7px -3px var(--hl),
    inset -3px -4px 8px -4px color-mix(in srgb, var(--accent) 40%, transparent), inset 0 0 0 1px color-mix(in srgb, var(--hl) 40%, transparent),
    0 1px 0 color-mix(in srgb, var(--hl) 50%, transparent), 0 6px 14px color-mix(in srgb, var(--text) 12%, transparent);
  transition: transform .3s var(--spring), box-shadow .2s; }
.gsel-btn::after { content: ""; position: absolute; right: 13px; top: 50%; width: 10px; height: 6px; margin-top: -3px; transition: transform .35s var(--spring);
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%23707a88' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") no-repeat center; }
.gsel-btn[aria-expanded="true"]::after { transform: rotate(180deg); }
.gsel-btn:active { transform: scale(.96); }
.gsel-btn:disabled { opacity: .5; cursor: default; }
.gsel-btn:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.gsel-txt { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; text-align: center; width: 100%; }
.gsel.unit .gsel-btn { padding: 0 26px; font-weight: 600; }
.gsel.unit .gsel-btn::after { right: 10px; }
.gsel-pop { position: fixed; z-index: 4000; margin: 0; padding: 6px; list-style: none; overflow-y: auto; overscroll-behavior: contain; scrollbar-width: thin;
  border-radius: 20px; opacity: 0; transform: scale(.86); isolation: isolate;
  background: linear-gradient(160deg, color-mix(in srgb, var(--hl) 32%, transparent), transparent 45%), color-mix(in srgb, var(--surface) 76%, transparent);
  -webkit-backdrop-filter: blur(22px) saturate(1.85); backdrop-filter: blur(22px) saturate(1.85);
  border: 1px solid color-mix(in srgb, var(--text) 9%, transparent);
  box-shadow: inset 0 1.5px 1px var(--hl), inset 0 0 0 1px color-mix(in srgb, var(--hl) 32%, transparent), 0 22px 50px color-mix(in srgb, var(--sh) 80%, transparent), 0 4px 12px rgba(0, 0, 0, .08); }
.gsel-pop li[role="option"] { position: relative; z-index: 1; display: flex; align-items: center; justify-content: center; text-align: center; padding: 9px 28px; border-radius: 14px;
  cursor: pointer; font-size: .92rem; color: var(--text); line-height: 1.3; user-select: none; }
.gsel-pop li[aria-selected="true"] { font-weight: 700; color: var(--accent); }
.gsel-pop li[aria-disabled="true"] { opacity: .45; cursor: default; }
.gsel-pop .ck { position: absolute; left: 10px; top: 50%; transform: translateY(-50%); width: 16px; height: 16px; opacity: 0; }
.gsel-pop .ck svg { width: 16px; height: 16px; display: block; }
.gsel-pop li[aria-selected="true"] .ck { opacity: 1; }
.gsel-pop .lens { border-radius: 14px; }
.lite .gsel-btn, .lite .gsel-pop { -webkit-backdrop-filter: none; backdrop-filter: none; background: var(--surface); }
@media (prefers-reduced-transparency: reduce) { .gsel-btn, .gsel-pop { -webkit-backdrop-filter: none; backdrop-filter: none; background: var(--surface); } }
/* Casillas de verificación y botones de opción «Liquid Glass» */
input[type=checkbox], input[type=radio] {
  -webkit-appearance: none; appearance: none;
  flex: none !important; width: 24px; height: 24px; margin: 0; cursor: pointer; position: relative;
   display: inline-grid; place-content: center;
  border-radius: 8px;
  border: 1px solid color-mix(in srgb, var(--hl) 60%, color-mix(in srgb, var(--text) 18%, transparent));
  background:
    radial-gradient(120% 100% at 30% 15%, color-mix(in srgb, var(--hl) 65%, transparent), transparent 60%),
    linear-gradient(160deg, color-mix(in srgb, var(--hl) 28%, transparent), transparent 50%, color-mix(in srgb, var(--accent) 10%, transparent) 100%),
    color-mix(in srgb, var(--surface) 68%, transparent);
  -webkit-backdrop-filter: blur(10px) saturate(1.6); backdrop-filter: blur(10px) saturate(1.6);
  box-shadow:
    inset 0 1.5px 1px var(--hl),
    inset 0 -1px 1.5px color-mix(in srgb, var(--hl) 55%, transparent),
    inset 0 2px 5px -2px color-mix(in srgb, var(--text) 14%, transparent),
    0 3px 8px -2px color-mix(in srgb, var(--text) 14%, transparent);
  transition: transform .26s var(--spring), background .2s ease, box-shadow .2s ease, border-color .2s ease;
}
input[type=radio] { border-radius: 999px; }
input[type=checkbox]::after {
  content: ""; width: 13px; height: 10px;
  background: no-repeat center / contain url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 14 11'%3E%3Cpath d='M1.5 5.5l3.6 3.6L12.5 1.7' fill='none' stroke='%23ffffff' stroke-width='2.3' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  transform: scale(0); opacity: 0;
  transition: transform .26s var(--spring), opacity .18s ease;
}
:root[data-theme="dark"] input[type=checkbox]:checked::after {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 14 11'%3E%3Cpath d='M1.5 5.5l3.6 3.6L12.5 1.7' fill='none' stroke='%2307202f' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) input[type=checkbox]:checked::after {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 14 11'%3E%3Cpath d='M1.5 5.5l3.6 3.6L12.5 1.7' fill='none' stroke='%2307202f' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  }
}
input[type=radio]::after {
  content: ""; width: 10px; height: 10px; border-radius: 999px;
  background: var(--accent-t);
  box-shadow: 0 1px 3px rgba(0, 0, 0, .25);
  transform: scale(0); opacity: 0;
  transition: transform .26s var(--spring), opacity .18s ease;
}
input[type=checkbox]:hover, input[type=radio]:hover {
  transform: scale(1.06);
  border-color: color-mix(in srgb, var(--accent) 55%, var(--hl));
  box-shadow:
    inset 0 1.5px 1px var(--hl),
    0 4px 12px -2px color-mix(in srgb, var(--accent) 28%, transparent);
}
input[type=checkbox]:active, input[type=radio]:active { transform: scale(.9); }
input[type=checkbox]:checked, input[type=radio]:checked {
  border-color: color-mix(in srgb, var(--hl) 55%, var(--accent));
  background:
    radial-gradient(115% 130% at 50% 18%, rgba(255, 255, 255, .72), transparent 58%),
    linear-gradient(180deg, color-mix(in srgb, #fff 34%, transparent) 0%, transparent 55%, rgba(0, 0, 0, .12) 100%),
    var(--accent);
  box-shadow:
    inset 0 1.5px 1px rgba(255, 255, 255, .75),
    inset 0 -1.5px 2px rgba(0, 0, 0, .18),
    0 5px 14px -2px color-mix(in srgb, var(--accent) 48%, transparent);
}
input[type=checkbox]:checked::after, input[type=radio]:checked::after {
  transform: scale(1); opacity: 1;
}
input[type=checkbox]:focus-visible, input[type=radio]:focus-visible {
  outline: none;
  box-shadow: inset 0 1.5px 1px var(--hl), 0 0 0 3px color-mix(in srgb, var(--accent) 32%, transparent);
}
input[aria-invalid="true"], textarea[aria-invalid="true"] { border-color: var(--bad); border-width: 2px; }
.suffix { align-self: center; color: var(--muted); font-size: .9rem; }
.help { font-size: .8rem; color: var(--muted); text-align: center; }
.field-err { font-size: .82rem; color: var(--bad); font-weight: 600; text-align: center; }
.field-err:empty { display: none; }
.set { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font-weight: 600; font-size: .88rem; }
.btn-row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; justify-content: center; text-align: center; margin: 14px auto 6px; }
.btn { display: inline-flex; align-items: center; justify-content: center; text-align: center; gap: 6px; font: 600 .92rem var(--font); padding: 8px 18px; min-height: 40px; border-radius: 999px; color: var(--text); cursor: pointer;
  transition: background .15s, transform .25s var(--spring), filter .15s; }
.btn:hover { filter: brightness(1.03); }
.btn:active { transform: scale(.95); }
.btn:disabled { opacity: .42; cursor: default; transform: none; filter: none; }
.btn.primary { border: 1px solid var(--accent); color: var(--accent-t); font-weight: 700;
  background: linear-gradient(180deg, color-mix(in srgb, #fff 32%, transparent), transparent 55%), var(--accent);
  box-shadow: inset 0 1.5px 1px rgba(255, 255, 255, .6), 0 6px 16px color-mix(in srgb, var(--accent) 35%, transparent); }
.btn.primary:hover { filter: brightness(1.08); }
.btn.ghost { opacity: .9; }
.btn.small { padding: 5px 13px; min-height: 32px; font-size: .84rem; }
.btn.icon { padding: 2px 10px; min-height: 32px; font-size: 1.05rem; line-height: 1; }
.btn.danger { color: var(--bad); }
.err-box { margin: 10px auto; max-width: 78ch; text-align: center; padding: 10px 14px; border-radius: 14px; background: var(--bad-soft); color: var(--bad); border: 1px solid var(--bad); }
.warn-box { margin: 10px auto; max-width: 78ch; text-align: center; padding: 9px 14px; border-radius: 14px; background: var(--warn-soft); color: var(--warn); border-left: 4px solid var(--warn); }
.warn-box ul { margin: 4px auto 0; padding-left: 18px; display: inline-block; text-align: left; }

/* ---------- Resultados ---------- */
.output:empty { display: none; }
.result { margin-top: 16px; padding: 16px 20px; border-left: 4px solid var(--accent); text-align: center; animation: panelIn .3s ease-out; }
.result.kind-sim { border-left-color: var(--sim); }
.result.kind-est { border-left-color: var(--warn); }
.result-head { display: flex; justify-content: center; align-items: center; gap: 10px; flex-wrap: wrap; text-align: center; }
.badge { display: inline-block; font-size: .74rem; padding: 2px 10px; border-radius: 999px; background: var(--surface-2); color: var(--muted); border: 1px solid var(--border); white-space: nowrap; }
.badge.kind, .badge.kind-calc { background: var(--accent-soft); color: var(--accent); border-color: transparent; }
.kind-sim .badge.kind, .badge.kind-sim { background: var(--sim-soft); color: var(--sim); border-color: transparent; }
.kind-est .badge.kind, .badge.kind-est { background: var(--warn-soft); color: var(--warn); border-color: transparent; }
.badge.kind-ref { background: var(--good-soft); color: var(--good); border-color: transparent; }
.badge.good { background: var(--good-soft); color: var(--good); border-color: var(--good); }
.badge.bad { background: var(--bad-soft); color: var(--bad); border-color: var(--bad); }
.res-rows { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 18px; margin: 10px 0; }
.res-row { flex: 1 1 200px; max-width: 300px; display: flex; flex-direction: column; align-items: center; text-align: center; padding: 6px 0; border-bottom: 1px dashed var(--border); }
.res-row dt { font-size: .8rem; color: var(--muted); }
.res-row dd { margin: 0; font-size: 1.02rem; font-variant-numeric: tabular-nums; }
.res-row.strong dd { font-size: 1.3rem; font-weight: 700; color: var(--accent); }
.res-row .unit { color: var(--muted); font-size: .9em; font-weight: 400; }
.res-block { margin-top: 10px; text-align: center; }
.eq { font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: .88rem; background: color-mix(in srgb, var(--surface-2) 80%, transparent); padding: 9px 12px; border-radius: 12px; overflow-x: auto; max-width: 820px; margin-inline: auto; text-align: center; }
.eq div { white-space: pre-wrap; }
.steps { padding-left: 22px; margin: 6px auto; max-width: 72ch; text-align: left; }
.steps li { margin-bottom: 3px; }
details { margin-top: 10px; text-align: center; }
summary { cursor: pointer; font-weight: 600; color: var(--accent-2); padding: 4px 0; text-align: center; }
.notes ul { margin: 4px auto; padding-left: 20px; font-size: .92rem; max-width: 72ch; text-align: left; }
.doc-card { margin-top: 18px; padding: 10px 18px; text-align: center; }
.doc-dl { display: grid; grid-template-columns: minmax(120px, 190px) 1fr; gap: 6px 14px; font-size: .9rem; max-width: 760px; margin: 8px auto; text-align: left; }
.doc-dl dt { font-weight: 600; color: var(--muted); }
.doc-dl dd { margin: 0; }
.doc-dl ul { margin: 0; padding-left: 18px; }

/* ---------- Tablas ---------- */
.tbl-wrap { overflow-x: auto; max-width: 100%; border-radius: 14px; text-align: center; }
.tbl { margin-inline: auto; border-collapse: separate; border-spacing: 0; font-size: .9rem; font-variant-numeric: tabular-nums; background: color-mix(in srgb, var(--surface) 85%, transparent); border: 1px solid var(--border); border-radius: 14px; overflow: hidden; }
.tbl th, .tbl td { border-bottom: 1px solid var(--border); padding: 6px 10px; text-align: center; vertical-align: middle; }
.tbl tr:last-child td { border-bottom: 0; }
.tbl th { background: var(--surface-2); font-weight: 700; }
.tbl caption { text-align: center; font-weight: 700; padding: 4px 0; }
.tbl.small { font-size: .82rem; margin: 6px auto; }
.tbl.edit td { padding: 2px; }
.tbl.edit input { width: 100%; min-width: 74px; border: 0; background: transparent; min-height: 32px; padding: 4px 6px; border-radius: 8px; text-align: center; }
.tbl.edit input:focus { background: var(--accent-soft); box-shadow: none; }
.tbl td.flag { background: var(--warn-soft); }
.tbl td.miss { background: var(--bad-soft); }
.tbl tr.excluded td { text-decoration: line-through; color: var(--muted); }
.st-pass { color: var(--good); font-weight: 700; }
.st-fail { color: var(--bad); font-weight: 700; }
.st-pend { color: var(--warn); font-weight: 700; }

/* ---------- Gráficas ---------- */
.chart { margin: 12px auto 0; text-align: center; }
.chart-svg { position: relative; width: 100%; display: flex; justify-content: center; }
.chart-svg svg { display: block; max-width: 100%; height: auto; margin-inline: auto; border-radius: 14px; border: 1px solid var(--border); }
.chart-tip { display: none; position: absolute; pointer-events: none; color: var(--text); font-size: .78rem; padding: 4px 10px; border-radius: 999px; white-space: nowrap; z-index: 5; background: var(--glass-strong); }
.chart-legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 4px 14px; font-size: .84rem; margin-top: 6px; align-items: center; }
.lg-item { display: inline-flex; gap: 6px; align-items: center; }
.lg-sw { display: inline-block; width: 18px; height: 0; border-top: 3px solid var(--sw); }
.lg-sw.dash { border-top-style: dashed; }
.lg-sw.dot { width: 10px; height: 10px; border: 0; border-radius: 50%; background: var(--sw); }
.lg-hint { color: var(--muted); font-size: .76rem; width: 100%; text-align: center; }
.chart-tools details { margin-top: 4px; }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 14px; }

/* ---------- Seguridad ---------- */
.ghs-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; margin-bottom: 14px; }
.ghs { display: flex; flex-direction: column; gap: 8px; align-items: center; justify-content: center; text-align: center; padding: 14px; }
.ghs svg { flex: none; width: 70px; height: 70px; }
.ghs.selectable { cursor: pointer; user-select: none; -webkit-user-select: none; transition: transform .25s var(--spring), box-shadow .22s ease, border-color .22s ease, background .22s ease; }
.ghs.selectable:hover { transform: translateY(-2px); }
.ghs.selectable:active { transform: scale(.97); }
.ghs input { margin-top: 2px; }
.ghs.on {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--hl));
  background:
    radial-gradient(120% 130% at 50% 15%, color-mix(in srgb, var(--hl) 65%, transparent), transparent 62%),
    color-mix(in srgb, var(--accent) 14%, var(--glass-strong));
  box-shadow:
    inset 0 1.5px 1.5px var(--hl),
    inset 0 0 0 1px color-mix(in srgb, var(--accent) 32%, transparent),
    0 10px 26px -4px color-mix(in srgb, var(--accent) 28%, transparent);
}
.disclaimer { border: 1px solid var(--warn); background: var(--warn-soft); color: var(--warn); padding: 10px 14px; border-radius: 14px; margin: 0 auto 14px; max-width: 82ch; text-align: center; }

/* ---------- Aprendizaje ---------- */
.exercise { padding: 18px 22px; margin-top: 12px; text-align: center; display: flex; flex-direction: column; align-items: center; }
.exercise .stmt { font-size: 1.04rem; max-width: 72ch; margin-inline: auto; text-align: center; }
.exercise .field { margin: 10px auto 2px; max-width: 340px; width: 100%; align-items: center; text-align: center; }
.exercise .input-row { justify-content: center; max-width: 280px; margin-inline: auto; }
.review-list { list-style: none; padding: 0; margin: 10px auto; display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; max-width: 820px; }
.fb-ok { background: var(--good-soft); color: var(--good); border-left: 4px solid var(--good); padding: 8px 12px; border-radius: 12px; margin: 10px auto 0; max-width: 72ch; text-align: center; animation: okpop .45s var(--spring); }
.fb-bad { background: var(--bad-soft); color: var(--bad); border-left: 4px solid var(--bad); padding: 8px 12px; border-radius: 12px; margin: 10px auto 0; max-width: 72ch; text-align: center; animation: shake .4s; }
@keyframes shake { 20%, 60% { transform: translateX(-5px); } 40%, 80% { transform: translateX(5px); } }
@keyframes okpop { 40% { transform: scale(1.02); } }
.choices { list-style: none; padding: 0; margin: 10px auto; max-width: 620px; }
.choices li { margin-bottom: 6px; }
.choices label { display: flex; gap: 8px; align-items: center; justify-content: center; text-align: center; border: 1px solid var(--border); border-radius: 14px; padding: 10px 14px; cursor: pointer; background: color-mix(in srgb, var(--surface) 70%, transparent); }
.choices input { margin: 0; }
.stat-tiles { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-bottom: 12px; }
.tile { flex: 1 1 160px; max-width: 220px; padding: 12px 16px; text-align: center; }
.tile b { display: block; font: 700 1.5rem var(--font-display); color: var(--accent); }
.gloss { max-width: 74ch; margin-inline: auto; text-align: center; }
.gloss dt { font-weight: 700; margin-top: 12px; color: var(--accent-2); }
.gloss dd { margin: 3px 0 0; }

/* ---------- Cuaderno de laboratorio (paso a paso sin exceso de scroll) ---------- */
.nb-layout { display: grid; grid-template-columns: 230px 1fr; gap: 16px; align-items: start; margin-top: 10px; }
.nb-sidebar { display: flex; flex-direction: column; gap: 8px; }
.nb-side-head { display: flex; align-items: center; justify-content: center; gap: 8px; }
.nb-side-head h3 { margin: 0; font-size: .96rem; }
.nb-list { list-style: none; margin: 0; padding: 6px; max-height: 410px; overflow-y: auto; scrollbar-width: thin; }
.nb-list li + li { margin-top: 3px; }
.nb-list li button { display: flex; flex-direction: column; align-items: center; justify-content: center; width: 100%; text-align: center; border: 0; border-radius: 12px; padding: 8px 10px; background: transparent; color: var(--text); font: inherit; cursor: pointer; transition: background .18s, transform .2s var(--spring); }
.nb-list li button:hover { background: var(--surface-2); }
.nb-list li button:active { transform: scale(.97); }
.nb-list li button[aria-current="true"] { background: color-mix(in srgb, var(--accent) 14%, transparent); color: var(--accent); font-weight: 700; box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 28%, transparent); }
.nb-item-title { display: block; max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.nb-list small { display: block; color: var(--muted); font-weight: 400; font-size: .76rem; margin-top: 2px; }
.nb-editor { display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.nb-actions { margin: 0 auto 4px; }
.nb-workspace { display: grid; grid-template-columns: 235px 1fr; gap: 14px; align-items: stretch; }
.nb-steps { list-style: none; margin: 0; padding: 6px; display: flex; flex-direction: column; gap: 3px; border-radius: var(--radius); background: color-mix(in srgb, var(--surface-2) 65%, transparent); border: 1px solid color-mix(in srgb, var(--text) 8%, transparent); box-shadow: inset 0 1px 1px var(--hl); }
.nb-step-btn { width: 100%; display: flex; align-items: center; justify-content: center; gap: 7px; padding: 5px 10px; min-height: 30px; border: 0; border-radius: 999px; background: transparent; color: var(--muted); font: 600 .8rem var(--font); cursor: pointer; text-align: center; transition: background .18s, color .18s, transform .22s var(--spring), box-shadow .18s; }
.nb-step-btn:hover { color: var(--text); background: color-mix(in srgb, var(--surface) 60%, transparent); }
.nb-step-btn:active { transform: scale(.96); }
.nb-step-btn[aria-current="step"] {
  color: var(--text);
  background: radial-gradient(110% 130% at 50% 20%, color-mix(in srgb, var(--hl) 90%, transparent), transparent 60%), color-mix(in srgb, var(--accent) 16%, color-mix(in srgb, var(--surface) 85%, transparent));
  box-shadow: inset 0 1.5px 1px var(--hl), inset 0 0 0 1px color-mix(in srgb, var(--accent) 32%, transparent), 0 3px 10px -2px color-mix(in srgb, var(--accent) 25%, transparent);
}
.nb-step-num { flex: none; width: 19px; height: 19px; border-radius: 999px; display: inline-grid; place-items: center; font-size: .72rem; font-weight: 700; background: color-mix(in srgb, var(--text) 8%, transparent); color: var(--muted); }
.nb-step-btn[aria-current="step"] .nb-step-num { background: var(--accent); color: var(--accent-t); }
.nb-step-txt { flex: 1; text-align: center; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.nb-step-dot { flex: none; width: 6px; height: 6px; border-radius: 50%; background: transparent; transition: background .2s, transform .2s; }
.nb-step-btn.is-filled .nb-step-dot { background: var(--good); transform: scale(1.1); }
.nb-step-pane { display: flex; flex-direction: column; justify-content: space-between; align-items: center; gap: 10px; padding: 16px 18px; border-radius: var(--radius); background: color-mix(in srgb, var(--surface) 68%, transparent); border: 1px solid color-mix(in srgb, var(--text) 8%, transparent); box-shadow: inset 0 1px 1px var(--hl); animation: toolBodyIn .2s cubic-bezier(.22, 1, .36, 1) both; }
.nb-step-head { display: flex; flex-direction: column; align-items: center; gap: 4px; width: 100%; }
.nb-step-title { margin: 0; font-size: 1.08rem; }
.nb-field { width: 100%; max-width: 100% !important; flex: 1; justify-content: center; }
.nb-nature-row { max-width: 420px; margin: 0 auto 6px; }
.nb-editor textarea { font-family: inherit; font-size: .94rem; min-height: 170px; max-height: 240px; text-align: center; }
.nb-step-nav { width: 100%; justify-content: center; margin: 4px 0 0; }
.nb-empty { padding: 32px 16px; text-align: center; }
.print-only { display: none; }

/* =====================================================================
   Diseño adaptable por TAMAÑO DE VENTANA (no por tipo de aparato), para que
   funcione igual en teléfono, tableta y ventanas divididas del escritorio:
     html[data-size] = compact (< 600 px) · medium (600–899) · expanded (900–1199)
                       · large (1200–1699) · xl (≥ 1700)
     html[data-short] = alto < 560 px (teléfono horizontal, escritorio en 4 partes)
   Ejemplos en una pantalla 1920 × 1080: mitad → expanded; tercio → medium;
   cuarto (960 × ~520) → expanded + short; dos tercios → large.
   ===================================================================== */
/* Columnas de las tarjetas de inicio */
html[data-size="compact"] .cards { grid-template-columns: 1fr; }
html[data-size="medium"] .cards, html[data-size="expanded"] .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
html[data-size="large"] .cards { grid-template-columns: repeat(3, minmax(0, 1fr)); }
html[data-size="xl"] .cards { grid-template-columns: repeat(4, minmax(0, 1fr)); }
html[data-size="xl"] main { max-width: 1480px; }
html[data-size="expanded"][data-short] .cards { grid-template-columns: repeat(3, minmax(0, 1fr)); }

/* Cuadrícula Inicio Bento Liquid Glass por dispositivo y orientación */
html[data-size="compact"] .qhGrid { grid-template-columns: 1fr !important; gap: 9px; margin: 8px auto; }
html[data-size="compact"] .qhCard { grid-template-columns: 44px minmax(0, 1fr) 26px; align-items: center; min-height: 72px !important; padding: 12px 14px; border-radius: 18px; row-gap: 0; }
html[data-size="compact"] .qhIco { width: 44px; height: 44px; border-radius: 13px; }
html[data-size="compact"] .qhIco svg { width: 22px; height: 22px; }
html[data-size="compact"] .qhCard b { font-size: 15.5px; }
html[data-size="compact"] .qhCard small { display: -webkit-box !important; font-size: 12.5px; line-height: 1.34; -webkit-line-clamp: 2; }
html[data-size="compact"] .qhChips { display: none !important; }
html[data-size="compact"] .qhArr { width: 26px; height: 26px; }
html[data-size="compact"] .qhMoreGrid { grid-template-columns: 1fr !important; gap: 9px; }
html[data-size="compact"] .qhCardExt { grid-template-columns: 44px minmax(0, 1fr) 26px; min-height: 72px !important; padding: 12px 14px; border-radius: 18px; }
html[data-size="compact"] .qhCardExt .qhHost { margin-top: 4px; }

html[data-short] .qhGrid { grid-template-columns: repeat(2, minmax(0, 1fr)) !important; gap: 10px; margin: 6px auto; }
html[data-short] .qhCard { grid-template-columns: 40px minmax(0, 1fr) 24px; align-items: center; column-gap: 10px; min-height: 68px !important; padding: 10px 13px; border-radius: 18px; row-gap: 0; }
html[data-short] .qhIco { width: 40px; height: 40px; border-radius: 12px; }
html[data-short] .qhIco svg { width: 20px; height: 20px; }
html[data-short] .qhCard b { font-size: 14.5px; line-height: 1.18; }
html[data-short] .qhCard small { display: -webkit-box !important; font-size: 12px; line-height: 1.3; -webkit-line-clamp: 1; }
html[data-short] .qhChips { display: none !important; }
html[data-short] .qhArr { width: 24px; height: 24px; }
html[data-short] .qhMoreGrid { grid-template-columns: repeat(2, minmax(0, 1fr)) !important; gap: 10px; }
html[data-short] .qhCardExt { grid-template-columns: 40px minmax(0, 1fr) 24px; min-height: 68px !important; padding: 10px 13px; border-radius: 18px; }
html[data-short] #sbMore { margin-top: 8px; padding-top: 8px; }
html[data-short] .more-link { min-height: 40px; padding: 5px 8px; }
html[data-short] .more-ico { width: 28px; height: 28px; flex: 0 0 28px; border-radius: 8px; }
html[data-short] .more-ico svg { width: 17px; height: 17px; }
html[data-short] .more-t { font-size: 13px; }
html[data-short] .more-host { font-size: 10.5px; }

html[data-size="medium"]:not([data-short]) .qhGrid,
html[data-size="expanded"]:not([data-short]) .qhGrid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 13px;
}
html[data-size="large"] .qhGrid,
html[data-size="xl"] .qhGrid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

/* Formularios y resultados */
html[data-size="compact"] .fields { gap: 12px; }
html[data-size="compact"] .field { flex: 1 1 100%; max-width: 100%; }
html[data-size="compact"] .input-row { flex-wrap: wrap; }
html[data-size="compact"] .input-row > input:not([type=checkbox]):not([type=radio]) { min-width: 130px; }
html[data-size="compact"] .gsel.unit, html[data-size="compact"] select.unit { max-width: 48%; }
html[data-size="medium"] .field { flex: 1 1 220px; }
html[data-size="compact"] .grid2, html[data-size="medium"] .grid2 { grid-template-columns: 1fr; }
html[data-size="compact"] .nb-layout, html[data-size="medium"] .nb-layout { grid-template-columns: 1fr; gap: 12px; }
html[data-size="compact"] .nb-workspace, html[data-size="medium"] .nb-workspace { grid-template-columns: 1fr; gap: 10px; }
html[data-size="compact"] .nb-list { display: flex; gap: 6px; overflow-x: auto; max-height: none; padding: 6px; }
html[data-size="compact"] .nb-list li { flex: 0 0 auto; min-width: 145px; max-width: 210px; margin-top: 0 !important; }
html[data-size="medium"] .nb-list { max-height: 22vh; }
html[data-size="compact"] .nb-steps { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 4px; padding: 6px; }
html[data-size="medium"] .nb-steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 4px; padding: 6px; }
html[data-size="compact"] .nb-step-btn, html[data-size="medium"] .nb-step-btn { width: 100%; padding: 5px 8px; font-size: .78rem; }
html[data-size="compact"] .nb-editor textarea { min-height: 140px; max-height: 200px; }
html[data-size="compact"] .doc-dl, html[data-size="medium"] .doc-dl { grid-template-columns: 1fr; text-align: center; }
/* En pantallas estrechas las pestañas se reparten en filas centradas (sin cortes ni desplazamiento) */
html[data-size="compact"] .tool-tabs { margin-bottom: 14px; flex-wrap: wrap; justify-content: center; border-radius: 22px; overflow: visible; touch-action: manipulation; }
html[data-size="compact"] .tab { padding: 7px 12px; font-size: .84rem; }

/* Cabecera media (ventana en tercio o tableta vertical estrecha) */
html[data-size="medium"] .brand-txt strong { font-size: 1.55rem; }
html[data-size="medium"] .brand .logo { width: 48px; height: 48px; border-radius: 15px; }
html[data-size="medium"] .brand .logo svg { width: 38px; height: 38px; }

/* Vista celular vertical (compact, < 600 px) */
html[data-size="compact"] { --nav-w: min(86vw, 310px); --radius: 16px; }
html[data-size="compact"] .app-header { padding: 10px 12px 4px; }
html[data-size="compact"] .toolpill { top: 10px; left: max(12px, env(safe-area-inset-left)); padding: 3px 5px; }
html[data-size="compact"] .toolpill button { width: 34px; height: 32px; }
html[data-size="compact"] .tp-space { display: none; }
html[data-size="compact"] .topbar { grid-template-columns: 1fr; justify-items: center; padding-top: 38px; gap: 6px; }
html[data-size="compact"] .brand { justify-content: center; gap: 10px; }
html[data-size="compact"] .brand .logo { width: 40px; height: 40px; border-radius: 13px; }
html[data-size="compact"] .brand .logo svg { width: 31px; height: 31px; }
html[data-size="compact"] .brand-txt { align-items: center; text-align: center; }
html[data-size="compact"] .brand-txt strong { font-size: 1.25rem; }
html[data-size="compact"] .brand-txt small { font-size: .78rem; margin-top: 2px; }
html[data-size="compact"] .searchrow { margin: 10px auto 2px; }
html[data-size="compact"] main { padding: 8px 10px 32px; }
html[data-size="compact"] .tool { padding: 15px 14px; }
html[data-size="compact"] h1 { font-size: 1.28rem; }
html[data-size="compact"] .head-ic { width: 36px; height: 36px; border-radius: 12px; }
html[data-size="compact"] .head-ic svg { width: 21px; height: 21px; }
html[data-size="compact"] .btn { min-height: 40px; padding: 8px 15px; font-size: .88rem; }
html[data-size="compact"] .btn.small { min-height: 34px; padding: 5px 12px; font-size: .82rem; }
html[data-size="compact"] .ghs-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }

/* Táctil: objetivos cómodos y tamaño de fuente 16 px en entradas para evitar el auto-zoom del navegador móvil */
html[data-pointer="coarse"] .nav-row a { min-height: 46px; font-size: 15px; }
html[data-pointer="coarse"] .subnav a { padding: 9px 10px; font-size: 14px; }
html[data-pointer="coarse"] input[type=text], html[data-pointer="coarse"] input[type=search], html[data-pointer="coarse"] input[type=number], html[data-pointer="coarse"] select, html[data-pointer="coarse"] textarea,
html[data-size="compact"] input[type=text], html[data-size="compact"] input[type=search], html[data-size="compact"] input[type=number], html[data-size="compact"] select, html[data-size="compact"] textarea { font-size: 16px; }

/* Vista celular horizontal (data-short, alto < 560 px) */
html[data-short] .app-header { padding: 8px 14px 4px; display: flex; flex-direction: column; align-items: center; gap: 6px; }
html[data-short] .toolpill { top: 8px; left: max(12px, env(safe-area-inset-left)); padding: 3px 5px; }
html[data-short] .toolpill button { width: 32px; height: 30px; }
html[data-short] .tp-space { display: none; }
html[data-short] .topbar { width: 100%; display: flex; justify-content: center; align-items: center; min-height: 36px; padding-top: 0; gap: 8px; }
html[data-short] .brand { justify-content: center; gap: 9px; }
html[data-short] .brand .logo { width: 34px; height: 34px; border-radius: 11px; }
html[data-short] .brand .logo svg { width: 26px; height: 26px; }
html[data-short] .brand-txt strong { font-size: 1.12rem; }
html[data-short] .brand-txt small { display: none; }
html[data-short] .searchrow { width: 100%; max-width: 440px; margin: 2px auto 0; }
html[data-short] .search input { min-height: 36px; }
html[data-short] main { padding: 6px 12px 24px; }
html[data-short] .mod-head h1 { font-size: 1.15rem; margin: 2px 0 8px; }
html[data-short] .head-ic { width: 32px; height: 32px; border-radius: 10px; }
html[data-short] .head-ic svg { width: 19px; height: 19px; }
html[data-short] .tool-tabs { margin-bottom: 10px; padding: 4px; touch-action: manipulation; }
html[data-short] .tab { padding: 6px 12px; font-size: .84rem; }
html[data-short] .tool { padding: 14px 18px; }
html[data-short] .fields { gap: 10px 14px; }
html[data-short] .field { flex: 1 1 200px; max-width: 290px; }
html[data-short] .app-nav { padding-top: 8px; }
html[data-short] .nav-row a { min-height: 38px; font-size: 14px; }
html[data-short] .subnav a { padding: 6px 10px; }
html[data-short] .seg button { min-height: 30px; }
html[data-short] .nb-layout { grid-template-columns: 185px 1fr; gap: 10px; }
html[data-short] .nb-workspace { grid-template-columns: 195px 1fr; gap: 10px; }
html[data-short] .nb-list { max-height: 240px; display: block; }
html[data-short] .nb-steps { display: flex; flex-direction: column; max-height: 240px; overflow-y: auto; gap: 2px; padding: 5px; }
html[data-short] .nb-step-pane { padding: 12px 14px; gap: 6px; }
html[data-short] .nb-editor textarea { min-height: 96px; max-height: 140px; }
/* Ventana baja y muy estrecha a la vez */
html[data-short][data-size="compact"] .topbar { padding-top: 34px; }
html[data-short][data-size="compact"] .nb-layout, html[data-short][data-size="compact"] .nb-workspace { grid-template-columns: 1fr; }
@media (max-width: 380px) {
  html[data-size="compact"] .nb-steps { grid-template-columns: 1fr; }
}

/* Durante un redibujado por cambio de idioma: sin animaciones ni transiciones (evita parpadeos) */
html.instant *, html.instant *::before, html.instant *::after { animation: none !important; transition: none !important; }

/* Accesibilidad y rendimiento */
.lite *, .lite *::before, .lite *::after { transition: none !important; animation: none !important; -webkit-backdrop-filter: none !important; backdrop-filter: none !important; }
.lite html::before, html.lite::before { display: none; }
.lite .glass, .lite .toolpill, .lite .search input, .lite .tool-tabs, .lite .btn:not(.primary),
.lite .panel, .lite .tool, .lite .hero, .lite .card, .lite .result, .lite .exercise, .lite .tile, .lite .ghs, .lite .nb-list, .lite .doc-card { background: var(--surface); box-shadow: none; }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; animation: none !important; } }
@media (prefers-reduced-transparency: reduce) {
  .glass, .toolpill, .search input, .tool-tabs, .btn:not(.primary), .panel, .tool, .hero, .card, .result, .exercise, .tile, .ghs, .nb-list, .doc-card, .app-nav { -webkit-backdrop-filter: none; backdrop-filter: none; background: var(--surface); }
}

/* ---------- Impresión ---------- */
@media print {
  html::before, body::before, .scrim { display: none !important; }
  .app-header, .app-nav, .toolpill, .app-footer, .btn, .btn-row, .tool-tabs, .skip, .no-print, .chart-tools, .lg-hint, .nb-list { display: none !important; }
  body, main, .tool, .result { background: #fff !important; color: #000 !important; border: 0; box-shadow: none !important; -webkit-backdrop-filter: none !important; backdrop-filter: none !important; }
  body.docked.nav-open { padding-left: 0; }
  .layout { display: block; }
  main { padding: 0; }
  .print-only { display: block; }
  .nb-layout { display: block; }
  textarea { border: 0; resize: none; }
  .nb-print h2 { border-bottom: 1px solid #999; margin-top: 14px; }
  .nb-print pre { white-space: pre-wrap; font-family: inherit; }
}