/* ACCESS Practice Lab — EduWonderLab design system.
   Tokens, type, chrome (top bar, footer), and the shared components every screen reuses:
   buttons, panels, forms, disclosures, chips, progress, feedback.
   View-specific layout lives next to the view (home.css, activity.css, studios.css, ...).
   Light theme only. Every colour a screen uses is a token defined here. */

@font-face {
  font-family: "Atkinson Hyperlegible";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(/assets/fonts/atkinson-hyperlegible-0aa3443e.woff2) format("woff2");
  unicode-range:
    U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329,
    U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Atkinson Hyperlegible";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(/assets/fonts/atkinson-hyperlegible-9efd124f.woff2) format("woff2");
  unicode-range:
    U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329,
    U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F,
    U+A720-A7FF;
}
@font-face {
  font-family: "Atkinson Hyperlegible";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url(/assets/fonts/atkinson-hyperlegible-ef295152.woff2) format("woff2");
  unicode-range:
    U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329,
    U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Atkinson Hyperlegible";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url(/assets/fonts/atkinson-hyperlegible-f19440bb.woff2) format("woff2");
  unicode-range:
    U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329,
    U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F,
    U+A720-A7FF;
}
@font-face {
  font-family: "Atkinson Hyperlegible";
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url(/assets/fonts/atkinson-hyperlegible-2f9137da.woff2) format("woff2");
  unicode-range:
    U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329,
    U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Fraunces";
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url(/assets/fonts/fraunces-175f6e93.woff2) format("woff2");
  unicode-range:
    U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329,
    U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Fraunces";
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url(/assets/fonts/fraunces-ffbbcc88.woff2) format("woff2");
  unicode-range:
    U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329,
    U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F,
    U+A720-A7FF;
}

:root {
  --lab-scale: 1;

  /* ── material families: The Living Language Studio ──────────────────────
     Art-direction anchors. Screens use the semantic tokens below; reach for a
     material token only to paint an environment (hero, studio portal, art). */
  --mi-950: #080e25; /* Midnight Indigo */
  --mi-900: #121c3f;
  --mi-800: #1d2b58;
  --mi-600: #33447c;
  --mi-500: #455a9a;
  --mi-300: #9aa6d2;
  --ivory: #fffdf8; /* Ivory & Pearl */
  --pearl: #efe9e4;
  --pearl-blue: #d5dceb;
  --ocean-900: #075568; /* Ocean Glass — Listening */
  --ocean-600: #15969a;
  --ocean-200: #91e2d6;
  --rose-900: #4a1f35; /* Rose & Garnet — Speaking */
  --rose-600: #a24f72;
  --rose-200: #dba3b9;
  --copper-900: #884326; /* Burnished Copper — Writing */
  --copper-500: #d28b58;
  --copper-200: #f5d6a8;
  --sage-900: #264e48; /* Sage & Jade — growth, revision, feedback */
  --sage-500: #5a9481;
  --sage-200: #d0e3cd;

  /* ink and surfaces */
  --ink: #111a3b;
  --ink-2: #3a4566;
  --ink-3: #59637f;
  --bg: #f8f5ef;
  --surface: #fffdf8;
  --surface-2: #f4efe8;
  --surface-3: #ebe5dd;
  --line: #e4ddd2;
  --line-strong: #bdb4a6;

  /* action */
  --brand: #1d2b58;
  --brand-ink: #1d2b58;
  --brand-deep: #080e25;
  --brand-soft: #e9ebf5;
  --on-brand: #ffffff;
  --accent: #d28b58;
  --coral: #dba3b9;

  /* language domains: fill (white text on it), ink (text on white), soft (tint) */
  --listening: #075568;
  --listening-ink: #075568;
  --listening-soft: #e2f3f0;
  --reading: #2e4a94;
  --reading-ink: #2a4386;
  --reading-soft: #eceef8;
  --speaking: #8a3a5c;
  --speaking-ink: #7d3354;
  --speaking-soft: #f8ebf0;
  --writing: #9a4a26;
  --writing-ink: #884326;
  --writing-soft: #fbefe3;
  --room: var(--brand);
  --room-ink: var(--brand-ink);
  --room-soft: var(--brand-soft);

  /* feedback */
  --right: #276152;
  --right-soft: #e7f1ea;
  --wrong: #a8281d;
  --wrong-soft: #fcece9;
  --hint: #7f4314;
  --hint-soft: #fbf0e0;
  --focus: #1d2b58;

  /* shape and depth */
  --r-xs: 6px;
  --radius-sm: 10px;
  --radius: 16px;
  --r-lg: 22px;
  --r-xl: 30px;
  --target: 3rem;
  --shadow:
    0 1px 1px rgb(8 14 37 / 5%), 0 2px 6px rgb(8 14 37 / 5%), 0 10px 24px -12px rgb(8 14 37 / 14%);
  --shadow-lift:
    0 1px 2px rgb(8 14 37 / 6%), 0 8px 18px -6px rgb(8 14 37 / 14%),
    0 28px 48px -24px rgb(29 43 88 / 28%);
  --shadow-float: 0 24px 60px -18px rgb(8 14 37 / 38%), 0 6px 16px rgb(8 14 37 / 10%);
  /* light: a soft top edge catches light on raised material; never a glow for its own sake */
  --edge-light: inset 0 1px 0 rgb(255 255 255 / 70%);
  --edge-light-dark: inset 0 1px 0 rgb(255 255 255 / 12%);
  /* fine-grain paper texture, tiled under editorial surfaces */
  --grain: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .07 0 0 0 0 .09 0 0 0 0 .2 0 0 0 .05 0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");

  /* motion: state changes, orientation and feedback only (see DESIGN-SYSTEM.md) */
  --ease-out: cubic-bezier(0.2, 0.7, 0.2, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-press: cubic-bezier(0.3, 1.4, 0.6, 1);
  --dur-1: 120ms;
  --dur-2: 200ms;
  --dur-3: 320ms;
  --dur-4: 520ms;

  /* spacing */
  --s-1: 0.25rem;
  --s-2: 0.5rem;
  --s-3: 0.75rem;
  --s-4: 1rem;
  --s-5: 1.5rem;
  --s-6: 2rem;
  --s-7: 3rem;
  --s-8: 4.5rem;

  /* type */
  --font:
    "Atkinson Hyperlegible", system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans",
    "Helvetica Neue", Arial, sans-serif;
  --font-display: "Fraunces", "Iowan Old Style", Georgia, "Times New Roman", serif;
  --measure: 66ch;
  color-scheme: light;
}

.d-listening,
[data-domain="Listening"] {
  --room: var(--listening);
  --room-ink: var(--listening-ink);
  --room-soft: var(--listening-soft);
  --room-glow: #91e2d6;
}
.d-reading,
[data-domain="Reading"] {
  --room: var(--reading);
  --room-ink: var(--reading-ink);
  --room-soft: var(--reading-soft);
  --room-glow: #d5dceb;
}
.d-speaking,
[data-domain="Speaking"] {
  --room: var(--speaking);
  --room-ink: var(--speaking-ink);
  --room-soft: var(--speaking-soft);
  --room-glow: #dba3b9;
}
.d-writing,
[data-domain="Writing"] {
  --room: var(--writing);
  --room-ink: var(--writing-ink);
  --room-soft: var(--writing-soft);
  --room-glow: #f5d6a8;
}
.d-model-test,
[data-domain="Model-Test"] {
  --room: var(--ink);
  --room-ink: var(--ink);
  --room-soft: var(--surface-2);
}

/* ── base ──────────────────────────────────────────────────────────────── */
html {
  font-size: calc(100% * var(--lab-scale));
  scroll-padding-top: 5rem;
}
body {
  background:
    radial-gradient(1400px 700px at 100% 0%, rgb(213 220 235 / 45%), transparent 70%) no-repeat,
    var(--grain),
    var(--bg);
  color: var(--ink);
  font: 400 1.0625rem/1.6 var(--font);
  font-optical-sizing: auto;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
h1,
h2 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.018em;
  color: var(--ink);
  text-wrap: balance;
  font-variant-ligatures: none;
  font-feature-settings: "liga" 0, "dlig" 0, "calt" 0;
}
h1 {
  font-size: clamp(2rem, 1.45rem + 2.4vw, 3.1rem);
}
h2 {
  font-size: clamp(1.4rem, 1.2rem + 0.9vw, 1.9rem);
}
h3,
h4 {
  font-family: var(--font);
  font-weight: 700;
  line-height: 1.25;
  color: var(--ink);
}
h3 {
  font-size: 1.15rem;
}
p {
  text-wrap: pretty;
}
a {
  color: var(--brand-ink);
  text-underline-offset: 0.18em;
  text-decoration-thickness: 1.5px;
}
a:hover {
  color: var(--brand-deep);
}
:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 8px;
  box-shadow: 0 0 0 6px #fff;
}
[tabindex="-1"]:focus-visible {
  outline: none;
  box-shadow: none;
}
::selection {
  background: var(--pearl-blue);
}
.fine {
  font-size: 0.9375rem;
  color: var(--ink-2);
}
.eyebrow {
  margin: 0 0 var(--s-2);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: none;
  color: var(--room-ink);
}
.lead {
  font-size: clamp(1.1rem, 1.02rem + 0.35vw, 1.3rem);
  line-height: 1.55;
  color: var(--ink-2);
  max-width: 56ch;
  margin: var(--s-2) 0 var(--s-5);
}
.disclaimer {
  color: var(--ink-3);
  font-size: 0.9rem;
  max-width: 70ch;
}
.ico {
  display: inline-block;
  width: 1.25em;
  height: 1.25em;
  flex: none;
  vertical-align: -0.22em;
}
.ico-lg {
  width: 1.75em;
  height: 1.75em;
}

/* ── chrome: top bar ───────────────────────────────────────────────────── */
.lab-top {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-4);
  min-height: 4.25rem;
  padding: 0.5rem clamp(1rem, 3vw, 2.25rem);
  background: rgb(255 253 248 / 88%);
  backdrop-filter: saturate(1.3) blur(14px);
  color: var(--ink);
  border-bottom: 1px solid rgb(29 43 88 / 10%);
  box-shadow: 0 1px 0 rgb(255 255 255 / 80%) inset, 0 10px 30px -24px rgb(8 14 37 / 40%);
}
.lab-brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  flex: none;
  color: var(--ink);
  text-decoration: none;
}
.lab-logo {
  display: block;
  width: 2.5rem;
  height: 2.5rem;
  flex: none;
  background: none;
  box-shadow: none;
}
.lab-logo svg {
  display: block;
  width: 100%;
  height: 100%;
}
.lab-wordmark {
  display: grid;
  line-height: 1.1;
}
.lab-wordmark strong {
  white-space: nowrap;
  font-family: var(--font-display);
  font-weight: 650;
  font-size: 1.2rem;
  letter-spacing: -0.015em;
}
.lab-wordmark small {
  font-size: 0.8125rem;
  color: var(--ink-3);
  font-weight: 700;
}
.lab-tools {
  display: flex;
  align-items: center;
  gap: 0.15rem;
}
.top-link {
  position: relative;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 2.75rem;
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  color: var(--ink-2);
  font-weight: 700;
  font-size: 0.975rem;
  text-decoration: none;
}
.top-link .ico {
  width: 1.2rem;
  height: 1.2rem;
  color: var(--ink-3);
}
.top-link:hover {
  background: var(--surface-2);
  color: var(--ink);
}
.lab-top .top-link {
  color: var(--ink-2);
}
.lab-top .top-link:hover {
  background: var(--surface-2);
}
.top-link[aria-current="page"] {
  color: var(--brand-deep);
}
.top-link[aria-current="page"] .ico {
  color: var(--brand);
}
.top-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0.8rem;
  right: 0.8rem;
  bottom: 0.1rem;
  height: 3px;
  border-radius: 3px;
  background: var(--brand);
}
.lab-utilities {
  position: relative;
  flex: none;
}
.lab-utilities > summary {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 2.75rem;
  padding: 0.4rem 0.9rem;
  border: 1.5px solid var(--line-strong);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink);
  font-weight: 700;
  font-size: 0.975rem;
  white-space: nowrap;
  cursor: pointer;
  list-style: none;
}
.lab-utilities > summary::-webkit-details-marker {
  display: none;
}
.lab-utilities > summary::after {
  display: none;
}
.lab-utilities > summary:hover {
  border-color: var(--ink-3);
}
.lab-utilities[open] > summary {
  background: var(--surface-2);
}
.lab-utilities-body {
  position: absolute;
  right: 0;
  top: calc(100% + 0.6rem);
  z-index: 40;
  width: min(46rem, 92vw);
  max-height: min(78vh, 40rem);
  overflow: auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: var(--s-4) var(--s-5);
  padding: var(--s-5);
  background: var(--surface);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-float);
}
.menu-group {
  display: grid;
  align-content: start;
  gap: 0.1rem;
}
.menu-group h2 {
  margin: 0 0 0.35rem;
  font: 700 0.9rem var(--font);
  letter-spacing: 0;
  color: var(--ink-3);
}
.menu-group a,
.menu-group button.menu-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  width: 100%;
  min-height: 2.75rem;
  padding: 0.4rem 0.6rem;
  border: 0;
  border-radius: var(--radius-sm);
  background: none;
  color: var(--ink);
  font: 700 0.975rem var(--font);
  text-align: left;
  text-decoration: none;
  cursor: pointer;
}
.menu-group a .ico,
.menu-group button.menu-item .ico {
  color: var(--brand);
}
.menu-group a:hover,
.menu-group button.menu-item:hover {
  background: var(--surface-2);
}
.menu-note {
  grid-column: 1 / -1;
  margin: 0;
  padding-top: var(--s-3);
  border-top: 1px solid var(--line);
}
.menu-compact {
  display: none;
}
.text-size {
  display: inline-flex;
  border: 1.5px solid var(--line-strong);
  border-radius: 999px;
  overflow: hidden;
  background: var(--surface);
}
.ts-btn {
  min-width: 3rem;
  min-height: 2.75rem;
  border: 0;
  background: transparent;
  color: var(--ink);
  font: 700 0.975rem var(--font);
  cursor: pointer;
}
.ts-btn:hover {
  background: var(--surface-2);
}
.ts-btn + .ts-btn {
  border-left: 1.5px solid var(--line);
}
.lab-main {
  width: min(1200px, 100%);
  margin: 0 auto;
  padding: clamp(1rem, 2.6vw, 2.25rem) clamp(1rem, 3vw, 2rem) var(--s-7);
}
.lab-main:focus {
  outline: none;
}
.boot {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  /* Reserve the first screen while the app boots, so the footer is not on screen and then pushed away (CLS). */
  min-height: 100vh;
  padding: 3rem 0;
  color: var(--ink-2);
}
.boot-dot {
  width: 0.8rem;
  height: 0.8rem;
  border-radius: 50%;
  background: var(--brand);
  animation: pulse 1s ease-in-out infinite alternate;
}
@keyframes pulse {
  to {
    opacity: 0.3;
  }
}

/* ── chrome: footer ────────────────────────────────────────────────────── */
.lab-footer {
  --gutter: clamp(1rem, 3vw, 2rem);
  margin-top: var(--s-7);
  padding: var(--s-6) max(var(--gutter), calc((100% - 1200px) / 2 + var(--gutter))) var(--s-5);
  background: var(--ink);
  color: #dbe6f4;
  text-align: left;
}
.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(2, minmax(0, 1fr));
  gap: var(--s-5) var(--s-6);
  width: 100%;
}
.footer-brand {
  display: grid;
  gap: var(--s-2);
  align-content: start;
}
.footer-brand strong {
  font: 650 1.25rem var(--font-display);
  color: #fff;
}
.footer-brand p,
.footer-legal,
.footer-build {
  margin: 0;
  color: #b4c4d9;
  font-size: 0.9375rem;
}
.footer-brand p {
  max-width: 52ch;
}
.footer-build {
  margin-top: var(--s-2);
  font-size: 0.8125rem;
  color: #8ea3bd;
}
.footer-links {
  display: grid;
  align-content: start;
  gap: 0.15rem;
}
.footer-links h2 {
  margin: 0 0 0.4rem;
  font: 700 0.9375rem var(--font);
  letter-spacing: 0;
  color: #fff;
}
.footer-links a {
  display: inline-flex;
  align-items: center;
  min-height: 2.5rem;
  color: #dbe6f4;
  text-underline-offset: 0.2em;
}
.footer-links a:hover {
  color: #fff;
}
.lab-footer :focus-visible {
  outline-color: #9ec1ff;
  box-shadow: none;
}
.footer-legal {
  margin: var(--s-5) 0 0;
  padding-top: var(--s-4);
  border-top: 1px solid rgb(255 255 255 / 16%);
}

/* ── buttons ───────────────────────────────────────────────────────────── */
.btn,
.ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  min-height: var(--target);
  padding: 0.6rem 1.25rem;
  border-radius: 12px;
  border: 1.5px solid var(--line-strong);
  background: var(--surface);
  color: var(--ink);
  font: 700 1rem/1.2 var(--font);
  text-decoration: none;
  cursor: pointer;
  transition:
    background-color var(--dur-2) var(--ease-out),
    border-color var(--dur-2) var(--ease-out),
    box-shadow var(--dur-2) var(--ease-out),
    transform var(--dur-1) var(--ease-press);
}
.btn:hover {
  border-color: var(--ink-3);
  background: var(--surface-2);
  color: var(--ink);
}
.btn:active,
.ghost:active {
  transform: translateY(1px) scale(0.985);
}
.btn-primary {
  background: linear-gradient(180deg, var(--mi-600), var(--brand) 55%);
  border-color: var(--brand);
  color: var(--on-brand);
  box-shadow:
    var(--edge-light-dark),
    0 1px 2px rgb(8 14 37 / 20%),
    0 8px 18px -8px rgb(29 43 88 / 55%);
}
.btn-primary:hover {
  background: linear-gradient(180deg, var(--mi-500), var(--mi-800) 60%);
  border-color: var(--brand-deep);
  color: var(--on-brand);
}
.btn-secondary {
  background: var(--brand-soft);
  border-color: var(--pearl-blue);
  color: var(--brand-deep);
}
.btn-secondary:hover {
  background: var(--pearl-blue);
  border-color: var(--brand);
  color: var(--brand-deep);
}
.btn[disabled],
.ghost[disabled],
.btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
}
.btn-big {
  min-height: 3.5rem;
  padding-inline: 1.9rem;
  font-size: 1.125rem;
  border-radius: 14px;
}
.ghost {
  border-color: transparent;
  background: transparent;
  color: var(--brand-ink);
}
.ghost:hover {
  background: var(--brand-soft);
}
.ghost.small,
.btn.small {
  min-height: 2.75rem;
  padding: 0.3rem 0.9rem;
  font-size: 0.95rem;
}

.practice-status {
  display: inline-flex;
  align-items: center;
  min-height: 1.8rem;
  width: fit-content;
  padding: 0.18rem 0.65rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--ink-2);
  font-size: 0.875rem;
  font-weight: 700;
  line-height: 1.25;
}
.practice-status.is-in-progress {
  border-color: #9cb7e6;
  background: #edf3fd;
  color: #234d91;
}
.practice-status.is-practice-complete {
  border-color: #9acfc8;
  background: #e8f5f3;
  color: #125d58;
}
.practice-status.is-needs-review {
  border-color: #e4bf80;
  background: #fff5e5;
  color: #694309;
}
.practice-status.is-strong-practice {
  border-color: #a9caa9;
  background: #edf6ec;
  color: #275d2c;
}
.ghost.danger {
  color: var(--wrong);
}
.btn-kicker {
  display: block;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: none;
}
.row-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3);
  align-items: center;
  margin: var(--s-4) 0;
}

/* ── surfaces ──────────────────────────────────────────────────────────── */
.panel,
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: clamp(1.1rem, 2.4vw, 1.75rem);
  box-shadow: var(--shadow);
}
.panel {
  margin: var(--s-4) 0;
}
.card {
  border-radius: var(--radius);
}
.panel > h2:first-child,
.panel > h1:first-child {
  margin-top: 0;
}

/* ── forms ─────────────────────────────────────────────────────────────── */
label.field,
.field {
  display: grid;
  gap: 0.35rem;
  font-weight: 700;
  color: var(--ink);
}
input[type="text"],
input[type="search"],
input[type="number"],
input[type="email"],
input:not([type]),
select,
textarea {
  width: 100%;
  min-height: 3rem;
  padding: 0.65rem 0.9rem;
  border: 1.5px solid var(--line-strong);
  border-radius: 12px;
  background: var(--surface);
  color: var(--ink);
  font: 400 1.0625rem/1.5 var(--font);
  transition:
    border-color 0.15s,
    box-shadow 0.15s;
}
textarea {
  min-height: 7.5rem;
  resize: vertical;
}
input:hover,
select:hover,
textarea:hover {
  border-color: var(--ink-3);
}
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  border-color: var(--brand);
  outline: 3px solid rgb(69 90 154 / 35%);
  outline-offset: 0;
  box-shadow: none;
}
input[type="checkbox"],
input[type="radio"] {
  width: 1.4rem;
  height: 1.4rem;
  accent-color: var(--brand);
  flex: none;
}
fieldset {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--s-4);
  margin: 0;
}
legend {
  padding: 0 0.4rem;
  font-weight: 700;
  color: var(--ink);
}
[role="alert"]:not([hidden]) {
  padding: 0.75rem 1rem;
  border-radius: 12px;
  border: 1.5px solid #f0b4ad;
  border-left-width: 6px;
  background: var(--wrong-soft);
  color: var(--wrong);
  font-weight: 700;
}

/* ── disclosures ───────────────────────────────────────────────────────── */
details > summary {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  min-height: 3rem;
  padding: 0.6rem 2.75rem 0.6rem 1rem;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  border-radius: 12px;
}
details > summary::-webkit-details-marker {
  display: none;
}
details > summary::after {
  content: "";
  position: absolute;
  right: 1rem;
  top: 50%;
  width: 1.1rem;
  height: 1.1rem;
  margin-top: -0.55rem;
  background: currentColor;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E")
    center / contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E")
    center / contain no-repeat;
  color: var(--ink-3);
  transition: transform 0.2s;
}
details[open] > summary::after {
  transform: rotate(180deg);
}
details > summary:hover {
  background: var(--surface-2);
}
.cando,
.strand,
.helpers,
.transcript,
.ladder,
details.strategy,
details.more-tools,
details.session-options {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  margin: var(--s-3) 0;
  padding: 0;
}
details[open] > summary {
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
  border-bottom: 1px solid var(--line);
}
details > :not(summary) {
  margin-inline: 1rem;
}
details > p:last-child,
details > ul:last-child {
  margin-bottom: 1rem;
}
details > summary + * {
  margin-top: 0.9rem;
}

/* ── chips, progress ───────────────────────────────────────────────────── */
.chip,
.cat-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 2.75rem;
  padding: 0.35rem 1rem;
  border: 1.5px solid var(--line-strong);
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink);
  font: 700 0.975rem var(--font);
  cursor: pointer;
}
.cat-chip:hover {
  border-color: var(--ink-3);
  background: var(--surface-2);
}
.cat-chip[aria-pressed="true"],
.cat-chip.is-active,
.chip.is-on {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}
.band-switch {
  display: inline-flex;
  gap: 0.25rem;
  padding: 0.3rem;
  border: 1.5px solid var(--line-strong);
  border-radius: 999px;
  background: var(--surface);
}
.band-btn {
  min-height: 2.75rem;
  padding: 0.4rem 1.15rem;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--ink-2);
  font: 700 1rem var(--font);
  text-decoration: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
}
.band-btn:hover {
  background: var(--surface-2);
  color: var(--ink);
}
.band-btn[aria-pressed="true"] {
  background: var(--ink);
  color: #fff;
}
.bar {
  position: relative;
  height: 0.6rem;
  border-radius: 999px;
  background: var(--surface-3);
  overflow: hidden;
}
.bar > i {
  position: absolute;
  inset: 0 auto 0 0;
  border-radius: inherit;
  background: var(--room);
  transition: width 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

/* ── breadcrumbs ───────────────────────────────────────────────────────── */
.crumbs {
  margin: 0 0 var(--s-4);
}
.crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.9375rem;
  color: var(--ink-3);
}
.crumbs li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--line-strong);
}
.crumbs a {
  color: var(--ink-2);
  text-decoration: none;
  font-weight: 700;
}
.crumbs a:hover {
  color: var(--brand-ink);
  text-decoration: underline;
}

/* ── notifications ─────────────────────────────────────────────────────── */
.toast {
  position: fixed;
  left: 50%;
  bottom: 1.25rem;
  transform: translateX(-50%);
  max-width: min(92vw, 36rem);
  padding: 0.8rem 1.2rem;
  border-radius: 14px;
  background: var(--ink);
  color: #fff;
  font-weight: 700;
  z-index: 60;
  box-shadow: var(--shadow-float);
}
#labStorageWarning,
#labNet {
  width: min(1200px, 100% - 2rem);
  margin: var(--s-3) auto 0;
  background: var(--hint-soft);
  border-color: #f0cf94;
  color: var(--hint);
}

/* ── empty and loading states ──────────────────────────────────────────── */
.empty-state {
  display: grid;
  justify-items: center;
  gap: var(--s-3);
  padding: var(--s-6) var(--s-4);
  text-align: center;
}
.empty-state img {
  width: min(16rem, 70%);
  height: auto;
  border-radius: var(--r-lg);
}
.empty-state h2,
.empty-state h3 {
  margin: 0;
}
.empty-state p {
  max-width: 44ch;
  margin: 0;
  color: var(--ink-2);
}
.skeleton {
  border-radius: var(--radius-sm);
  background: linear-gradient(
      100deg,
      var(--surface-2) 30%,
      var(--surface-3) 50%,
      var(--surface-2) 70%
    )
    0 0 / 200% 100%;
  animation: shimmer 1.4s linear infinite;
}
@keyframes shimmer {
  to {
    background-position: -200% 0;
  }
}

/* ── responsive chrome ─────────────────────────────────────────────────── */
/* The two family buttons keep their labels on the top row at every width (families are mostly on phones).
   Teacher Expedition shrinks to an icon, then lives in the More menu on narrow screens. */
.top-expedition {
  border: 2px solid var(--brand);
  color: var(--brand-deep);
  margin-inline-start: 0.35rem;
}
@media (max-width: 2199px) {
  .lab-tools > .top-link[data-tier="low"] {
    display: none;
  }
}
/* Brand never shrinks (its wordmark is nowrap); the link row tightens instead so they cannot overlap. */
@media (min-width: 1100px) and (max-width: 1399px) {
  .lab-tools > .top-link:not(.top-expedition) > .ico {
    display: none;
  }
}
@media (max-width: 1399px) {
  .lab-tools .top-link {
    padding-inline: 0.55rem;
    gap: 0.3rem;
    font-size: 0.9rem;
  }
  .top-expedition:not(.top-family) {
    padding-inline: 0.65rem;
  }
  .top-expedition:not(.top-family) > span {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
  }
}
@media (max-width: 1099px) {
  .lab-top {
    flex-wrap: wrap;
    gap: 0.25rem 0.4rem;
  }
  .lab-brand {
    flex: 1 1 calc(100% - 7rem);
  }
  .lab-tools {
    display: contents;
  }
  .lab-tools > .top-expedition:not(.top-family) {
    display: none;
  }
  .lab-utilities {
    order: 1;
  }
  .top-family {
    order: 2;
    flex: 1 1 auto;
    justify-content: center;
    margin-inline-start: 0;
  }
  .lab-tools .lang-switch {
    order: 3;
    margin-inline-start: auto;
  }
}
@media (max-width: 559px) {
  .lab-top {
    position: static;
  }
  .top-family {
    flex: 1 1 40%;
    min-width: 0;
    white-space: normal;
    text-align: center;
    line-height: 1.15;
  }
}
@media (max-width: 960px) {
  .lab-tools > .top-link:not(.top-expedition) {
    display: none;
  }
  .menu-compact {
    display: grid;
  }
}
@media (max-width: 1120px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer-brand {
    grid-column: 1 / -1;
  }
}
@media (max-width: 360px) {
  .lab-wordmark strong {
    font-size: 0.95rem;
  }
  .lab-utilities > summary {
    padding-inline: 0.7rem;
  }
  .lab-utilities > summary > span {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
  }
}
@media (max-width: 560px) {
  .lab-wordmark small {
    display: none;
  }
  .lab-wordmark strong {
    font-size: 1.05rem;
  }
  .lab-utilities-body {
    position: fixed;
    inset: 4.25rem 0.75rem auto;
    width: auto;
    max-height: calc(100dvh - 5.25rem);
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
}
/* ── grade-band identity ───────────────────────────────────────────────
   One brand, two registers. Grades 3–5: warmer paper, rounder material, larger
   targets. Grades 6–8: cooler editorial paper, tighter radii, denser type. */
body[data-lab-band="3-5"] {
  --bg: #fbf6ec;
  --surface-2: #f7efe3;
  --radius: 20px;
  --r-lg: 26px;
  --r-xl: 34px;
  --target: 3.25rem;
}
body[data-lab-band="3-5"] .btn,
body[data-lab-band="3-5"] .ghost {
  border-radius: 16px;
  font-size: 1.0625rem;
}
body[data-lab-band="6-8"] {
  --bg: #f6f4ef;
  --radius: 14px;
  --r-lg: 18px;
  --r-xl: 24px;
}
body[data-lab-band="6-8"] h1 {
  letter-spacing: -0.026em;
}

/* ── navigation transition: the new screen settles in place (orientation, 240ms) ── */
@keyframes lab-settle {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
}
#app.is-entering > * {
  animation: lab-settle var(--dur-3) var(--ease-out) both;
}

/* ── assessment-style practice: quiet, focused, predictable ──────────────
   Practice tests and the simulator drop the atmosphere: plain pearl paper, no
   grain, no decorative depth, and a persistent mode label in the top bar. */
body[data-lab-view="test"],
body[data-lab-view="assess"] {
  background: #f6f6f3;
  --shadow: 0 1px 2px rgb(8 14 37 / 8%);
  --shadow-lift: 0 1px 3px rgb(8 14 37 / 10%);
}
body[data-lab-view="test"] .lab-top,
body[data-lab-view="assess"] .lab-top {
  background: #fff;
  backdrop-filter: none;
}
.mode-flag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.7rem;
  border: 1.5px solid var(--ink-3);
  border-radius: 999px;
  color: var(--ink);
  font-size: 0.875rem;
  font-weight: 700;
  white-space: nowrap;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}
@media print {
  .lab-footer {
    display: none;
  }
}

.section-title {
  font-size: clamp(1.4rem, 1.2rem + 0.9vw, 1.9rem);
}
.window-kicker {
  font-size: 0.9rem;
  font-weight: 700;
}

/* Shared site launchers stay out of the way inside the lab. */
/* Lab-scoped utility layout. Shared site launchers remain available through the header. */
body[data-lab-view] #nsr-launcher,
body[data-lab-view] #nsr-workbench,
body[data-lab-view] #mwb-launcher,
body[data-lab-view] .mwb-launcher-nav,
body[data-lab-view] .nt-chrome-dock,
body[data-lab-view] .nt-chrome-footer {
  display: none !important;
}
body[data-lab-view] #nsr-panel {
  max-height: calc(100dvh - 24px);
  overflow-y: auto;
}
body[data-lab-view] #nsr-panel .nsr-foot {
  font-size: 1rem;
}
body[data-lab-view] {
  --bg: #f0f4f5;
  --line: #cbd6d8;
  --surface-2: #f3f6f6;
  --shadow: 0 2px 8px rgb(25 51 58 / 5%);
}

/* ── reset and utilities ───────────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
}
img,
svg {
  max-width: 100%;
}
h1,
h2,
h3 {
  margin: 0 0 0.5rem;
}
h1:focus {
  outline: none;
}
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}
.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 50;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--surface);
}
.skip-link:focus {
  top: 0.75rem;
}

/* progress ring (ringHTML) */
.ring-bg {
  fill: none;
  stroke: var(--surface-3);
  stroke-width: 6;
}
.ring-fg {
  fill: none;
  stroke: var(--room);
  stroke-width: 6;
  stroke-linecap: round;
  transition: stroke-dashoffset 0.4s;
}
.ring-text {
  font: 700 0.78rem var(--font);
  fill: var(--ink);
}

/* ── print ─────────────────────────────────────────────────────────────── */
@media print {
  :root {
    --bg: #fff;
    --surface: #fff;
    --surface-2: #f3f3f3;
    --ink: #000;
    --line: #999;
    --shadow: none;
  }
  .no-print,
  .lab-top,
  .lab-footer,
  .crumbs,
  .act-nav,
  .listen-player,
  .recorder,
  .speed,
  .btn-check,
  .row-actions,
  .toast,
  #nsr-root {
    display: none !important;
  }
  body {
    background: #fff;
  }
  .lab-main {
    width: 100%;
    padding: 0;
  }
  .activity,
  .panel {
    padding: 0;
    border: 0;
    box-shadow: none;
  }
  details > summary {
    display: none;
  }
  details > * {
    display: block !important;
  }
  .ws-line {
    border-bottom-color: #555;
  }
}

/* ── language modes: English · Español · both ───────────────────────────── */
.lang-switch {
  display: inline-flex;
  flex: none;
  gap: 0.15rem;
  padding: 0.2rem;
  border: 1.5px solid var(--line-strong);
  border-radius: 999px;
  background: var(--surface);
}
.lang-btn {
  min-width: 2.75rem;
  min-height: 2.5rem;
  padding: 0.25rem 0.6rem;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--ink-2);
  font: 700 0.875rem var(--font);
  cursor: pointer;
}
.lang-btn:hover {
  background: var(--surface-2);
  color: var(--ink);
}
.lang-btn[aria-pressed="true"] {
  background: var(--ink);
  color: #fff;
}
.lang-switch-large .lang-btn {
  min-height: 2.75rem;
  padding: 0.4rem 1.1rem;
  font-size: 1rem;
}
.lab-tools .lang-switch {
  margin-inline: 0.4rem;
}
.lang-banner[hidden] {
  display: none;
}
html.lab-lang-pending .lang-banner[hidden] {
  display: flex;
}
.lang-banner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem 1rem;
  padding: 0.7rem max(1rem, 3vw);
  background: var(--brand-soft);
  border-bottom: 1px solid var(--line);
}
.lang-banner-text {
  margin: 0;
  color: var(--ink);
}
.lang-banner-skip {
  min-height: 2.75rem;
  padding: 0.3rem 0.8rem;
  border: 0;
  background: transparent;
  color: var(--brand-deep);
  font: 700 0.9375rem var(--font);
  text-decoration: underline;
  cursor: pointer;
}

/* Bilingual mode: the Spanish sits under the English, smaller, never replacing it. */
body {
  --bi-es-color: var(--ink-3);
}
button,
a,
summary,
.btn-primary,
.lab-footer,
label:has(input:checked),
[aria-pressed="true"],
.done-badge,
.top-link[aria-current="page"],
.fam-subnav a[aria-current="page"] {
  --bi-es-color: currentColor;
}
.bi-es {
  display: block;
  margin-top: 0.15em;
  color: var(--bi-es-color);
  font-size: 0.88em;
  font-weight: 500;
  font-style: normal;
  line-height: 1.35;
}
.top-link .bi-es,
.menu-group .bi-es,
.footer-links .bi-es {
  font-size: 0.75rem;
  line-height: 1.1;
  margin-top: 0;
}
.btn .bi-es,
.band-btn .bi-es,
.ghost .bi-es {
  --bi-es-color: currentColor;
  font-size: 0.8em;
}
.lang-banner,
.fam-hero {
  --bi-es-color: var(--ink-2);
}
.bi-pair {
  display: inline-block;
  text-align: inherit;
}
.btn .bi-pair,
.band-btn .bi-pair {
  text-align: center;
}
@media (max-width: 420px) {
  .lab-top {
    flex-wrap: wrap;
    row-gap: 0.25rem;
  }
  .lab-brand {
    flex: 1 1 10rem;
  }
  .lab-wordmark strong {
    white-space: normal;
  }
  .lab-wordmark small {
    display: none;
  }
  .lab-tools .lang-switch {
    margin-inline: 0;
  }
  .top-family {
    padding-inline: 0.55rem;
    font-size: 0.875rem;
  }
  .top-family .ico {
    display: none;
  }
  .lab-tools .lang-btn {
    min-width: 2.1rem;
    padding-inline: 0.3rem;
  }
}

/* WebKit counted a <select>'s unclipped option text as page width, which widened /launch and /classroom past
   a 375px screen. Let fields shrink and clip the text with an ellipsis. */
.field {
  min-width: 0;
}
select {
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Grade-Band Visual Differentiation (3-5 Discovery vs 6-8 Studio) ──── */
body[data-lab-band="3-5"] .panel,
body[data-lab-band="3-5"] .room-tile,
body[data-lab-band="3-5"] .studio-card {
  border-radius: var(--r-lg);
}
body[data-lab-band="3-5"] .eyebrow {
  letter-spacing: 0.04em;
}
body[data-lab-band="6-8"] .panel,
body[data-lab-band="6-8"] .room-tile,
body[data-lab-band="6-8"] .studio-card {
  border-radius: var(--radius-sm);
  border-color: var(--line-strong);
}

/* ── Interactive Explanations, Strategy Steps & Model Borrow ───────────── */
.strategy-steps,
.model-borrow {
  margin-top: var(--s-3);
  padding-top: var(--s-3);
  border-top: 1px dashed var(--line-strong);
  display: grid;
  gap: var(--s-2);
}
.learn-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
  align-items: center;
}
.cat-chip.is-active {
  background: var(--brand);
  color: var(--on-brand);
  border-color: var(--brand);
}
.cat-chip.is-word {
  background: var(--surface-2);
  border-style: dashed;
}
.rr-notice-bar {
  margin-top: var(--s-3);
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
  align-items: center;
}
.grow-hub-links {
  margin-top: var(--s-4);
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
}