/* ============================================================
   classroom/css/classroom.css — Patina Classroom design language

   The ESOL companion section has its OWN visual identity:
   indigo primary, clean white, calm and modern. It deliberately
   does NOT use the green Patina brand palette — only the
   typography family (Palatino wordmark + DM Sans) carries over
   so it still feels like a Patina product.

   Used by: classroom/index.html, classroom/lesson.html
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&display=swap');

:root {
  /* ── Palette ── */
  --indigo:        #4353A8;
  --indigo-dark:   #2E3B7E;
  --indigo-deep:   #232D5F;
  --indigo-soft:   #8A95D1;
  --indigo-tint:   #EEF0FA;
  --indigo-wash:   #F7F8FD;

  --amber:         #E8A33D;   /* warm accent — sparing use */
  --amber-tint:    #FDF4E4;

  --ok:            #2E9E6B;   /* correct */
  --ok-tint:       #E9F6F0;
  --warn:          #C75146;   /* try again — warm, not alarming */
  --warn-tint:     #FBEeec;

  --paper:         #FFFFFF;
  --page:          #FDFDFE;
  --ink:           #23273A;
  --ink-mid:       #464C66;
  --ink-soft:      #6B7190;
  --line:          #E3E5EF;
  --line-strong:   #C9CDE0;

  /* ── Type ── */
  --font-wordmark: 'Palatino Linotype', 'Book Antiqua', Palatino, Georgia, serif;
  --font-ui:       'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Big, adult-learner-friendly floor sizes */
  --fs-body:    18px;
  --fs-dir:     19px;    /* activity directions */
  --fs-option:  20px;    /* tappable choices */
  --fs-big:     26px;    /* focal content (words being learned) */

  /* ── Structure ── */
  --radius:     16px;
  --radius-sm:  10px;
  --tap:        56px;    /* minimum touch target */
  --container:  860px;

  --shadow-sm:  0 1px 3px rgba(35,39,58,.08), 0 0 0 1px rgba(35,39,58,.04);
  --shadow:     0 3px 12px rgba(35,39,58,.10), 0 0 0 1px rgba(35,39,58,.04);
  --shadow-md:  0 8px 28px rgba(46,59,126,.14), 0 0 0 1px rgba(35,39,58,.05);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-ui);
  font-size: var(--fs-body);
  line-height: 1.55;
  color: var(--ink);
  background: var(--page);
}
button { font-family: var(--font-ui); }

/* ─────────────────────────────────────────────────────────
   Header
   ───────────────────────────────────────────────────────── */
.pc-header {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 50;
}
.pc-header-inner {
  max-width: var(--container); margin: 0 auto;
  padding: 10px 16px;
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.pc-wordmark {
  font-family: var(--font-wordmark);
  font-size: 21px; color: var(--indigo-dark);
  text-decoration: none; letter-spacing: .2px;
  white-space: nowrap;
}
.pc-wordmark b { font-weight: 700; }
.pc-header-spacer { flex: 1; }

/* Language picker — always visible, one tap */
.pc-langs { display: flex; gap: 6px; }
.pc-lang {
  min-width: 44px; min-height: 40px;
  border: 1.5px solid var(--line-strong);
  background: var(--paper); color: var(--ink-mid);
  border-radius: 99px; font-size: 14px; font-weight: 700;
  cursor: pointer; padding: 4px 12px;
  transition: background .15s, color .15s, border-color .15s;
}
.pc-lang:hover { border-color: var(--indigo-soft); }
.pc-lang.on {
  background: var(--indigo); border-color: var(--indigo); color: #fff;
}

.pc-teacher-toggle {
  min-height: 40px;
  border: 1.5px dashed var(--line-strong);
  background: transparent; color: var(--ink-soft);
  border-radius: 99px; font-size: 13.5px; font-weight: 600;
  cursor: pointer; padding: 4px 14px;
}
.pc-teacher-toggle.on {
  border-style: solid; border-color: var(--amber);
  background: var(--amber-tint); color: #8A5E17;
}

/* ─────────────────────────────────────────────────────────
   Layout
   ───────────────────────────────────────────────────────── */
.pc-main { max-width: var(--container); margin: 0 auto; padding: 22px 16px 90px; }

.pc-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 22px;
}

/* ─────────────────────────────────────────────────────────
   Lesson home
   ───────────────────────────────────────────────────────── */
.pc-kicker {
  font-size: 14px; font-weight: 700; letter-spacing: .12em;
  text-transform: uppercase; color: var(--indigo);
  margin: 0 0 6px;
}
.pc-title {
  font-family: var(--font-wordmark);
  font-size: clamp(30px, 6vw, 42px); line-height: 1.12;
  margin: 0 0 10px; color: var(--indigo-deep);
}
.pc-sub { color: var(--ink-mid); margin: 0 0 20px; max-width: 620px; }

/* "Why am I learning this?" — the promise every lesson makes */
.pc-why {
  display: flex; gap: 14px; align-items: flex-start;
  background: var(--indigo-tint);
  border: 1px solid #D6DBF2;
  border-radius: var(--radius);
  padding: 18px 20px; margin: 0 0 22px;
}
.pc-why-icon { font-size: 28px; line-height: 1; margin-top: 2px; }
.pc-why h2 { margin: 0 0 4px; font-size: 17px; color: var(--indigo-dark); }
.pc-why p { margin: 0; color: var(--ink-mid); font-size: 16.5px; }
.pc-why .pc-sub-lang { margin-top: 6px; }

.pc-objectives { margin: 0 0 22px; }
.pc-objectives h2, .pc-vocab h2 {
  font-size: 15px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--ink-soft); margin: 0 0 10px;
}
.pc-objectives ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.pc-objectives li {
  display: flex; gap: 10px; align-items: flex-start; font-size: 16.5px;
  color: var(--ink-mid);
}
.pc-objectives li::before { content: "◦"; color: var(--indigo); font-weight: 900; }
.pc-objectives li.done::before { content: "✓"; color: var(--ok); }

.pc-vocab { margin: 0 0 26px; }
.pc-vocab-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.pc-chip {
  background: var(--indigo-wash); border: 1px solid var(--line);
  border-radius: 99px; padding: 6px 14px; font-size: 15.5px; color: var(--ink-mid);
}

/* Section map */
.pc-map { display: grid; gap: 12px; }
.pc-map-item {
  display: flex; align-items: center; gap: 16px; text-align: left;
  width: 100%; background: var(--paper);
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px 18px; cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: border-color .15s, box-shadow .15s, transform .15s;
}
.pc-map-item:hover { border-color: var(--indigo-soft); box-shadow: var(--shadow); transform: translateY(-1px); }
.pc-map-num {
  flex: 0 0 44px; height: 44px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--indigo-tint); color: var(--indigo-dark);
  font-weight: 700; font-size: 17px;
}
.pc-map-item.done .pc-map-num { background: var(--ok-tint); color: var(--ok); }
.pc-map-body { flex: 1; min-width: 0; }
.pc-map-title { font-size: 18px; font-weight: 700; color: var(--ink); margin: 0; }
.pc-map-meta { font-size: 14px; color: var(--ink-soft); margin: 2px 0 0; }
.pc-map-arrow { color: var(--indigo-soft); font-size: 20px; }

/* Level pill */
.pc-level {
  display: inline-block; font-size: 12.5px; font-weight: 700;
  letter-spacing: .04em; border-radius: 99px; padding: 2px 10px;
  background: var(--indigo-tint); color: var(--indigo-dark);
  vertical-align: middle;
}

/* ─────────────────────────────────────────────────────────
   Activity screen
   ───────────────────────────────────────────────────────── */
.pc-act-top {
  display: flex; align-items: center; gap: 12px; margin: 0 0 14px; flex-wrap: wrap;
}
.pc-back {
  border: none; background: none; color: var(--indigo);
  font-size: 15.5px; font-weight: 600; cursor: pointer; padding: 8px 4px;
}
.pc-act-title { font-size: 17px; font-weight: 700; color: var(--ink-mid); }

/* Progress dots for activities within a section */
.pc-dots { display: flex; gap: 7px; margin-left: auto; }
.pc-dot {
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--line-strong); transition: background .2s, transform .2s;
}
.pc-dot.now { background: var(--indigo); transform: scale(1.25); }
.pc-dot.done { background: var(--ok); }

/* Directions: English leads, translation supports underneath */
.pc-dir { margin: 0 0 18px; }
.pc-dir-en { font-size: var(--fs-dir); font-weight: 700; color: var(--ink); margin: 0; }
.pc-sub-lang {
  font-size: 16px; color: var(--ink-soft); font-style: italic; margin: 3px 0 0;
}

/* Focal prompt (the English being learned) */
.pc-prompt {
  font-size: var(--fs-big); font-weight: 700; color: var(--indigo-deep);
  margin: 0 0 18px; line-height: 1.3;
}
.pc-prompt .pc-say { margin-left: 10px; }

/* Audio button */
.pc-say {
  display: inline-grid; place-items: center;
  width: 46px; height: 46px; border-radius: 50%;
  border: 1.5px solid var(--indigo-soft); background: var(--indigo-tint);
  color: var(--indigo-dark); font-size: 20px; cursor: pointer;
  vertical-align: middle;
  transition: background .15s, transform .1s;
}
.pc-say:active { transform: scale(.94); }
.pc-say.big { width: 88px; height: 88px; font-size: 38px; }

/* Options grid */
.pc-options { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
.pc-options.stack { grid-template-columns: 1fr; }
.pc-opt {
  min-height: var(--tap);
  border: 2px solid var(--line-strong); border-radius: var(--radius);
  background: var(--paper); color: var(--ink);
  font-size: var(--fs-option); font-weight: 600;
  padding: 14px 16px; cursor: pointer; text-align: center;
  transition: border-color .15s, background .15s, transform .1s;
}
.pc-opt .pc-opt-emoji { display: block; font-size: 40px; line-height: 1.2; margin-bottom: 4px; }
.pc-opt.pic { padding: 22px 16px; }
.pc-opt.pic .pc-opt-emoji { font-size: 58px; margin-bottom: 0; }
.pc-opt:hover { border-color: var(--indigo-soft); }
.pc-opt:active { transform: scale(.98); }
.pc-opt.right { border-color: var(--ok); background: var(--ok-tint); }
.pc-opt.wrong { animation: pc-shake .4s; border-color: var(--warn); background: var(--warn-tint); }
.pc-opt.dim { opacity: .45; pointer-events: none; }
.pc-opt.picked { border-color: var(--indigo); background: var(--indigo-tint); }

@keyframes pc-shake {
  0%,100% { transform: translateX(0); }
  20%,60% { transform: translateX(-6px); }
  40%,80% { transform: translateX(6px); }
}

/* Feedback line */
.pc-feedback { min-height: 30px; margin: 14px 0 0; font-size: 17px; font-weight: 700; }
.pc-feedback.ok { color: var(--ok); }
.pc-feedback.no { color: var(--warn); }

/* Big continue / check buttons */
.pc-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: var(--tap); border-radius: 99px;
  border: none; cursor: pointer;
  font-size: 18px; font-weight: 700; padding: 12px 30px;
  background: var(--indigo); color: #fff;
  box-shadow: var(--shadow-sm);
  transition: background .15s, transform .1s;
}
.pc-btn:hover { background: var(--indigo-dark); }
.pc-btn:active { transform: scale(.98); }
.pc-btn.ghost {
  background: var(--paper); color: var(--indigo);
  border: 2px solid var(--indigo-soft);
}
.pc-btn.ghost:hover { background: var(--indigo-tint); }
.pc-btn:disabled { opacity: .4; pointer-events: none; }
.pc-actions { margin-top: 22px; display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }

/* ── Vocabulary cards ── */
.pc-vcards { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
.pc-vcard {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--paper); box-shadow: var(--shadow-sm);
  padding: 18px 12px; text-align: center; cursor: pointer;
  transition: box-shadow .15s, transform .15s, border-color .15s;
}
.pc-vcard:hover { box-shadow: var(--shadow); transform: translateY(-2px); border-color: var(--indigo-soft); }
.pc-vcard .em { font-size: 46px; line-height: 1.2; }
.pc-vcard .en { font-size: 20px; font-weight: 700; color: var(--indigo-deep); margin-top: 6px; }
.pc-vcard .note { font-size: 14px; color: var(--ink-soft); margin-top: 2px; }
.pc-vcard .hear { font-size: 13px; color: var(--indigo); margin-top: 8px; font-weight: 600; }

/* ── Match pairs ── */
.pc-match { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.pc-match .pc-opt { text-align: left; font-size: 18px; }
.pc-match .pc-opt.matched { border-color: var(--ok); background: var(--ok-tint); opacity: .7; pointer-events: none; }

/* ── Sequence (tap in order) ── */
.pc-seq-line {
  min-height: 74px; border: 2px dashed var(--line-strong); border-radius: var(--radius);
  background: var(--indigo-wash); padding: 10px;
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
  margin-bottom: 18px;
}
.pc-seq-pool { display: flex; flex-wrap: wrap; gap: 10px; }
.pc-seq-chip {
  min-height: 52px; min-width: 52px;
  border: 2px solid var(--line-strong); border-radius: var(--radius-sm);
  background: var(--paper); font-size: 21px; font-weight: 700; color: var(--ink);
  padding: 8px 16px; cursor: pointer;
  transition: transform .1s, border-color .15s, background .15s;
}
.pc-seq-chip:active { transform: scale(.95); }
.pc-seq-chip.placed { border-color: var(--ok); background: var(--ok-tint); cursor: default; }
.pc-seq-chip.wrong { animation: pc-shake .4s; border-color: var(--warn); }

/* ── Buckets ── */
.pc-buckets { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 18px; }
.pc-bucket {
  border: 2px solid var(--line-strong); border-radius: var(--radius);
  background: var(--paper); padding: 12px; min-height: 130px; cursor: pointer;
  transition: border-color .15s, background .15s;
}
.pc-bucket:hover { border-color: var(--indigo-soft); }
.pc-bucket.pulse { border-color: var(--indigo); background: var(--indigo-tint); }
.pc-bucket h3 { margin: 0 0 8px; font-size: 17px; color: var(--indigo-dark); text-align: center; }
.pc-bucket-items { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; }
.pc-bucket-items .got {
  background: var(--ok-tint); border: 1px solid #BFE3D2; color: var(--ink-mid);
  border-radius: 99px; padding: 3px 12px; font-size: 15px; font-weight: 600;
}

/* ── Typed answers ── */
.pc-input {
  width: 100%; min-height: var(--tap);
  border: 2px solid var(--line-strong); border-radius: var(--radius-sm);
  font-family: var(--font-ui); font-size: 22px; color: var(--ink);
  padding: 12px 16px;
}
.pc-input:focus { outline: none; border-color: var(--indigo); box-shadow: 0 0 0 3px var(--indigo-tint); }
.pc-input.ok { border-color: var(--ok); background: var(--ok-tint); }
.pc-input.no { border-color: var(--warn); }
.pc-hint { font-size: 15.5px; color: var(--ink-soft); margin: 8px 0 0; }
.pc-model {
  background: var(--amber-tint); border: 1px solid #F2DCB4; border-radius: var(--radius-sm);
  padding: 12px 16px; margin-top: 14px; font-size: 17px;
}
.pc-model b { color: #8A5E17; }

/* ── Dialogue ── */
.pc-chat { display: grid; gap: 10px; margin-bottom: 16px; }
.pc-bubble {
  max-width: 82%; border-radius: 18px; padding: 12px 18px;
  font-size: 19px; line-height: 1.45; position: relative;
}
.pc-bubble.a { background: var(--indigo-tint); color: var(--ink); justify-self: start; border-bottom-left-radius: 6px; }
.pc-bubble.b { background: var(--indigo); color: #fff; justify-self: end; border-bottom-right-radius: 6px; }
.pc-bubble .who { display: block; font-size: 12.5px; font-weight: 700; opacity: .65; margin-bottom: 2px; letter-spacing: .05em; }
.pc-bubble.blank { border: 2px dashed var(--indigo-soft); background: var(--paper); color: var(--ink-soft); }

/* ── Speaking cards ── */
.pc-speak-card {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--paper); box-shadow: var(--shadow);
  padding: 26px 22px; text-align: center;
}
.pc-speak-model {
  font-size: clamp(24px, 5vw, 32px); font-weight: 700; color: var(--indigo-deep);
  line-height: 1.35; margin: 14px 0 8px;
}
.pc-speak-note { color: var(--ink-soft); font-size: 16px; }

/* ── The real-world form ── */
.pc-form {
  background: #FFFEFB;
  border: 1.5px solid var(--line-strong); border-radius: 6px;  /* deliberately paper-like */
  box-shadow: var(--shadow);
  padding: 26px 22px; max-width: 560px; margin: 0 auto;
}
.pc-form-head { text-align: center; border-bottom: 2px solid var(--ink); padding-bottom: 12px; margin-bottom: 18px; }
.pc-form-head h3 { margin: 0; font-size: 21px; letter-spacing: .04em; }
.pc-form-head p { margin: 4px 0 0; font-size: 14px; color: var(--ink-soft); }
.pc-field { margin-bottom: 16px; }
.pc-field label { display: block; font-size: 15px; font-weight: 700; margin-bottom: 5px; letter-spacing: .02em; }
.pc-field label .pc-sub-lang { display: block; font-weight: 400; font-style: italic; font-size: 13.5px; margin: 0; }
.pc-field .pc-input { font-size: 19px; background: #fff; }
.pc-field select.pc-input { appearance: auto; }
.pc-field .fb { font-size: 14.5px; font-weight: 700; margin-top: 4px; min-height: 18px; }
.pc-field .fb.ok { color: var(--ok); }
.pc-field .fb.no { color: var(--warn); }
.pc-field.sig .pc-input { font-family: var(--font-wordmark); font-style: italic; font-size: 24px; }

.pc-form-note {
  display: flex; gap: 8px; align-items: flex-start;
  font-size: 14.5px; color: var(--ink-soft);
  background: var(--indigo-wash); border-radius: var(--radius-sm);
  padding: 10px 14px; margin: 0 auto 18px; max-width: 560px;
}

/* Profile card (fictional practice student) */
.pc-profile {
  display: flex; gap: 14px; align-items: center;
  background: var(--amber-tint); border: 1px solid #F2DCB4;
  border-radius: var(--radius); padding: 14px 18px; margin: 0 auto 18px; max-width: 560px;
}
.pc-profile .face { font-size: 40px; }
.pc-profile dl { margin: 0; font-size: 15.5px; display: grid; grid-template-columns: auto 1fr; gap: 1px 12px; }
.pc-profile dt { color: var(--ink-soft); }
.pc-profile dd { margin: 0; font-weight: 700; }

.pc-mode-row { display: flex; gap: 10px; justify-content: center; margin-bottom: 18px; flex-wrap: wrap; }

/* ── Section / lesson end screens ── */
.pc-done {
  text-align: center; padding: 40px 20px;
}
.pc-done .big { font-size: 64px; }
.pc-done h2 { font-family: var(--font-wordmark); font-size: 32px; color: var(--indigo-deep); margin: 10px 0 6px; }
.pc-done p { color: var(--ink-mid); max-width: 480px; margin: 0 auto 22px; }

/* ── Class games (sprint + Fat Cats): the screen is the game board,
      answers go in WhatsApp / Zoom chat ── */
.pc-chat-banner {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px;
  background: var(--amber-tint); border: 1.5px solid #F2DCB4;
  border-radius: var(--radius); padding: 10px 16px; margin: 0 0 16px;
  font-size: 16.5px; color: #6B4E1B;
}
.pc-chat-banner .pc-sub-lang { margin: 0; }

.pc-sprint-big {
  text-align: center; font-size: clamp(40px, 9vw, 72px); font-weight: 700;
  color: var(--indigo-deep); letter-spacing: .06em; margin: 8px 0 14px;
}
.pc-passage {
  background: #FFFEFB; border: 1.5px solid var(--line-strong); border-radius: 6px;
  box-shadow: var(--shadow-sm); max-width: 460px; margin: 0 auto 16px;
  padding: 16px 20px;
}
.pc-passage p { margin: 4px 0; font-size: 19px; font-weight: 600; }
.pc-passage p:first-child { border-bottom: 2px solid var(--ink); padding-bottom: 8px; margin-bottom: 8px; }

.pc-sprint-timer { text-align: center; margin: 6px 0 4px; }
.pc-timer-view { max-width: 420px; margin: 0 auto; }
.pc-timer-num { font-size: 44px; font-weight: 700; color: var(--indigo-dark); }
.pc-timer-track {
  height: 12px; border-radius: 99px; background: var(--indigo-tint); overflow: hidden;
}
.pc-timer-bar {
  height: 100%; width: 100%; border-radius: 99px;
  background: linear-gradient(90deg, var(--indigo), var(--indigo-soft));
  transition: width 1s linear;
}

.pc-reveal { min-height: 10px; text-align: center; }
.pc-reveal-box {
  display: inline-block; background: var(--ok-tint); border: 2px solid var(--ok);
  border-radius: var(--radius); padding: 12px 26px; margin-top: 14px;
  font-size: clamp(22px, 5vw, 34px); font-weight: 700; color: var(--ink);
  animation: pc-pop .25s ease-out;
}
.pc-reveal-box span { display: block; font-size: 13px; letter-spacing: .1em; text-transform: uppercase; color: var(--ok); }
@keyframes pc-pop { from { transform: scale(.7); opacity: 0; } to { transform: scale(1); opacity: 1; } }

body.pc-teacher .pc-sprint-big { font-size: clamp(52px, 11vw, 92px); }

/* ── Teacher-only elements ── */
.pc-tnotes { display: none; }
body.pc-teacher .pc-tnotes {
  display: block;
  background: var(--amber-tint); border: 1px dashed #E0C083;
  border-radius: var(--radius); padding: 16px 18px; margin-top: 22px;
  font-size: 15.5px; color: #5C4A21;
}
.pc-tnotes h3 { margin: 0 0 8px; font-size: 14px; letter-spacing: .1em; text-transform: uppercase; }
.pc-tnotes ul { margin: 0; padding-left: 18px; }
.pc-tnotes li { margin-bottom: 5px; }

/* Teacher jump strip (quick section hopping during class) */
.pc-jump { display: none; }
body.pc-teacher .pc-jump {
  display: flex; gap: 6px; flex-wrap: wrap;
  position: fixed; left: 12px; bottom: 12px; z-index: 60;
  background: rgba(255,255,255,.95); border: 1px solid var(--line);
  border-radius: 99px; padding: 6px; box-shadow: var(--shadow-md);
}
.pc-jump button {
  width: 38px; height: 38px; border-radius: 50%;
  border: 1px solid var(--line-strong); background: var(--paper);
  font-weight: 700; font-size: 14px; color: var(--ink-mid); cursor: pointer;
}
.pc-jump button.now { background: var(--indigo); border-color: var(--indigo); color: #fff; }

/* Teacher mode: presentation-scale type */
body.pc-teacher .pc-prompt { font-size: 34px; }
body.pc-teacher .pc-opt { font-size: 23px; }
body.pc-teacher .pc-dir-en { font-size: 22px; }
body.pc-teacher .pc-bubble { font-size: 22px; }

/* ─────────────────────────────────────────────────────────
   Hub (classroom/index.html)
   ───────────────────────────────────────────────────────── */
.pc-hero {
  background: linear-gradient(160deg, var(--indigo-deep), var(--indigo) 70%, #5163B8);
  color: #fff; padding: 54px 16px 60px; text-align: center;
}
.pc-hero .pc-kicker { color: #C7CEF0; }
.pc-hero h1 {
  font-family: var(--font-wordmark);
  font-size: clamp(34px, 7vw, 52px); margin: 0 0 12px; line-height: 1.1;
}
.pc-hero p { max-width: 560px; margin: 0 auto; color: #DDE1F6; font-size: 19px; }

.pc-chapters { max-width: var(--container); margin: -26px auto 0; padding: 0 16px 70px; display: grid; gap: 14px; }
.pc-chapter {
  display: flex; align-items: center; gap: 18px;
  background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 20px; text-decoration: none; color: inherit;
  transition: transform .15s, box-shadow .15s, border-color .15s;
}
.pc-chapter:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--indigo-soft); }
.pc-chapter.soon { opacity: .55; pointer-events: none; }
.pc-ch-num {
  flex: 0 0 54px; height: 54px; border-radius: 14px;
  display: grid; place-items: center;
  background: var(--indigo-tint); color: var(--indigo-dark);
  font-weight: 700; font-size: 21px;
}
.pc-chapter h2 { margin: 0; font-size: 20px; }
.pc-chapter p { margin: 3px 0 0; font-size: 15.5px; color: var(--ink-soft); }
.pc-ch-badge {
  margin-left: auto; flex: 0 0 auto;
  font-size: 13px; font-weight: 700; border-radius: 99px; padding: 4px 12px;
}
.pc-ch-badge.live { background: var(--ok-tint); color: var(--ok); }
.pc-ch-badge.soon { background: var(--indigo-wash); color: var(--ink-soft); border: 1px solid var(--line); }

.pc-hub-about { max-width: var(--container); margin: 0 auto; padding: 0 16px 80px; display: grid; gap: 14px; }
@media (min-width: 720px) { .pc-hub-about { grid-template-columns: 1fr 1fr 1fr; } }
.pc-hub-about .pc-card h3 { margin: 0 0 6px; font-size: 17px; color: var(--indigo-dark); }
.pc-hub-about .pc-card p { margin: 0; font-size: 15.5px; color: var(--ink-mid); }

/* ── Small screens ── */
@media (max-width: 560px) {
  .pc-match { grid-template-columns: 1fr; }
  .pc-buckets { grid-template-columns: 1fr; }
  .pc-options { grid-template-columns: 1fr 1fr; }
  .pc-options.stack { grid-template-columns: 1fr; }
  .pc-hero { padding: 40px 16px 50px; }
}

/* Reduced motion: keep it calm for everyone who asks */
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}