:root {
  /* ── Type scale — role-based sizes (single source of truth) ── */
  --fs-overline: .62rem;   /* uppercase labels / eyebrows   */
  --fs-caption:  .72rem;   /* meta · counts · captions      */
  --fs-small:    .8rem;    /* small body · card descriptions */
  --fs-body:     .9rem;    /* default body copy             */
  --fs-lead:     1rem;     /* lead paragraphs               */
  --fs-h3:       1.2rem;
  --fs-h2:       1.5rem;
  --fs-h1:       2.4rem;
  --fs-display:  3rem;     /* hero numerals / wordmark      */

  /* ── Weights ── */
  --fw-regular: 400;
  --fw-medium:  600;
  --fw-bold:    700;
  --fw-heavy:   800;       /* overlines / strong labels     */

  /* ── Tracking & leading ── */
  --tracking-tight:    -0.02em;
  --tracking-overline:  0.16em;
  --leading-tight:  1.1;
  --leading-snug:   1.35;
  --leading-normal: 1.55;

  /* legacy t-shirt aliases (back-compat) */
  --text-xs: .62rem;
  --text-sm: .75rem;
  --text-base: .88rem;
  --text-lg: 1rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.6rem;
}
/* ══════════════════════════════════════════════════════════════════
   Word Play — Shared Stylesheet
   ══════════════════════════════════════════════════════════════════ */

/* ─── RESET ────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: 'Charter', 'Georgia', 'Cambria', serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* ─── CSS VARIABLES ────────────────────────────────────────────── */
:root {
  --ink: #1A1A1A;
  --paper: #F7F3EE;
  --navy: #1A1A1A;
  --navy-light: #6B6B6B;
  --muted: #6B6B6B;
  --hairline: #E5E5E5;
  --amber: #B8860B;
  --teal: #1A7A8A;
  --accent: #B8860B;
  --accent-dark: #704B08;
  --cream: #FAFAFA;
  --cream-deep: #F0EDE8;
  --muted-deep: #5E5E5E;
  --border-soft: rgba(26,26,26,0.22);
  --navy-deep: #0D0D0D;
  --navy-mid: #3A3A3A;
  --offwhite: #F5F3EF;
  --green: #2E7D52;
  --red: #C0392B;
  --border: #E5E5E5;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-serif: Georgia, "Times New Roman", serif;

  /* ─── Semantic tokens (canonical — components should use these) ───
     Light values. The body.dark block flips the same set, so anything
     built on these adapts to dark mode with no per-rule overrides. */
  --surface:    #F7F3EE;   /* page background        */
  --surface-2:  #FFFFFF;   /* raised surfaces / cards */
  --text-1:     #1A1A1A;   /* primary text / titles   */
  --text-2:     #5E5E5E;   /* secondary / body copy   */
  --text-3:     #6B6B6B;   /* muted / meta            */
  --line:       #E5E5E5;   /* hairline borders        */

  /* ─── Feedback & status colors (light mode) ── */
  --color-success-bg:       rgba(39,174,96,0.10);     /* correct answer BG        */
  --color-success-border:   #27ae60;                   /* correct border           */
  --color-success-text:     #1d7d45;                   /* correct text             */
  --color-error-bg:         rgba(192,57,43,0.07);     /* wrong answer BG          */
  --color-error-border:     #c0392b;                   /* wrong border             */
  --color-error-text:       #a0342a;                   /* wrong text               */
  --color-option-bg-hover:  rgba(184,134,11,.05);     /* MC option hover BG       */
  --color-option-bg-focus:  rgba(184,134,11,.12);     /* MC option focus BG       */
  --color-mastery-weak-bg:  rgba(184,134,11,.12);     /* weak mastery chip        */

  /* ─── Overlay & transparency (light mode) ── */
  --color-overlay-dark:     rgba(20,20,20,0.92);      /* modal backdrop           */
  --color-overlay-light:    rgba(26,26,26,0.22);      /* soft overlay             */
  --color-text-muted:       rgba(255,255,255,.6);     /* over dark backgrounds    */
  --color-text-subtle:      rgba(255,255,255,.5);     /* subtle text              */

  /* ─── Print-specific colors (printables.html) — light mode ── */
  --print-accent:           #B8860B;                   /* amber accent / buttons   */
  --print-border:           #ddd;                      /* card borders             */
  --print-border-dark:      #999;                      /* darker borders / rules   */
  --print-border-light:     #eee;                      /* soft borders             */
  --print-text-primary:     #1A1A1A;                   /* main text                */
  --print-text-secondary:   #333;                      /* secondary text           */
  --print-text-tertiary:    #555;                      /* meta / labels            */
  --print-text-muted:       #666;                      /* muted text               */
  --print-text-light:       #777;                      /* lighter muted            */
  --print-text-white:       #fff;                      /* white on dark buttons    */
  --print-hover-bg:         #fffbf0;                   /* card hover background    */
  --print-instructions:     #444;                      /* instruction text color   */
  --print-model-border:     #ccc;                      /* model text left border   */
  --print-background:       #F0F0F0;                   /* light background         */
  --print-warm-bg:          #f5f0e8;                   /* warm page background     */
}

body.dark {
  --ink: #F0F0F0;
  --paper: #0E0E0E;
  --navy: #F0F0F0;
  --navy-light: #B8B8B8;
  --muted: #9A9A9A;
  --hairline: #2A2A2A;
  --amber: #C9A050;
  --teal: #4AABB8;
  --accent: #C9A050;
  --accent-dark: #A07830;
  --cream-deep: #1A1A1A;
  --muted-deep: #B0B0B0;   /* was #A8B4C6 — neutral grey, no cool tint vs the warm palette */
  --border-soft: rgba(255,255,255,0.16);
  --navy-deep: #0A0A0A;
  --navy-mid: #2A2A2A;
  --offwhite: #141414;
  --green: #4CAF82;
  --red: #E05A4A;
  --cream: #0E0E0E;

  /* ─── Semantic tokens — dark values (same names as :root) ─── */
  --surface:    #0E0E0E;
  --surface-2:  #1A1A1A;
  --text-1:     #F0F0F0;
  --text-2:     #B5B5B5;
  --text-3:     #8A8A8A;
  --line:       #2A2A2A;

  /* ─── Feedback & status colors (dark mode) ── */
  --color-success-bg:       rgba(39,174,96,0.13);     /* correct answer BG        */
  --color-success-border:   #4CAF82;                   /* correct border           */
  --color-success-text:     #5ecf85;                   /* correct text             */
  --color-error-bg:         rgba(192,57,43,0.13);     /* wrong answer BG          */
  --color-error-border:     #E05A4A;                   /* wrong border             */
  --color-error-text:       #FFA090;                   /* wrong text               */
  --color-option-bg-hover:  rgba(255,255,255,.07);    /* MC option hover BG       */
  --color-option-bg-focus:  rgba(255,255,255,.14);    /* MC option focus BG       */
  --color-mastery-weak-bg:  rgba(255,255,255,.07);    /* weak mastery chip        */

  /* ─── Overlay & transparency (dark mode) ── */
  --color-overlay-dark:     rgba(20,20,20,0.92);      /* modal backdrop           */
  --color-overlay-light:    rgba(255,255,255,.08);    /* soft overlay             */
  --color-text-muted:       rgba(255,255,255,.4);     /* muted text               */
  --color-text-subtle:      rgba(255,255,255,.38);    /* subtle text              */

  /* ─── Print-specific colors (printables.html) — dark mode ── */
  --print-accent:           #C9A050;                   /* amber accent / buttons   */
  --print-border:           #444;                      /* card borders             */
  --print-border-dark:      #555;                      /* darker borders / rules   */
  --print-border-light:      #222;                      /* soft borders             */
  --print-text-primary:     #F0F0F0;                   /* main text                */
  --print-text-secondary:   #D0D0D0;                   /* secondary text           */
  --print-text-tertiary:    #B0B0B0;                   /* meta / labels            */
  --print-text-muted:       #999;                      /* muted text               */
  --print-text-light:       #888;                      /* lighter muted            */
  --print-text-white:       #000;                      /* black on light buttons   */
  --print-hover-bg:         #1A1A1A;                   /* card hover background    */
  --print-instructions:     #C0C0C0;                   /* instruction text color   */
  --print-model-border:     #555;                      /* model text left border   */
  --print-background:       #1A1A1A;                   /* light background         */
  --print-warm-bg:          #2A2A2A;                   /* warm page background     */
}

button { font-family: inherit; -webkit-tap-highlight-color: transparent; border: none; background: none; cursor: pointer; }
button:focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; }
input, select, textarea { font-family: inherit; -webkit-tap-highlight-color: transparent; }
input:focus-visible, select:focus-visible, textarea:focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; }
a { color: inherit; }

/* ─── GLOBAL HEADER / NAV ──────────────────────────────────────── */
.site-header {
  background: var(--paper);
  color: var(--ink);
  padding: 14px 20px;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 2px solid var(--amber);
}
.site-header-inner {
  max-width: 840px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  position: relative;
  min-height: 44px;
  gap: 8px;
}
/* Brand sits top-left in normal flow — strongest position for recognition */
.site-header-inner .brand,
.site-header-inner a.brand {
  position: relative;
  z-index: 1;
  flex-shrink: 0;
}
/* The right-hand cluster (search · dark/QR · level) is pushed to the right
   by an auto margin on its first member, the search button. */
.site-header-inner .header-search-btn { margin-left: auto; }
.site-header a.brand,
.site-header .brand {
  color: var(--ink);
  text-decoration: none;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.site-header a.brand span {
  color: var(--amber);
  font-size: 0.75rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-family: var(--font-sans);
  font-weight: 700;
  margin-left: 8px;
  vertical-align: 2px;
}
.site-header .back {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.85rem;
  font-family: var(--font-sans);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 4px;
  transition: background 0.15s;
}
.site-header .back:active { background: rgba(255,255,255,0.1); }
/* Header back arrow removed — the brand stays fixed top-left and the
   breadcrumb (with its ← affordance) handles back navigation. */
.site-header .back.back-link { display: none !important; }
.site-header .forward-link::after { content: ''; }

/* ─── CONTAINER ─────────────────────────────────────────────────── */
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 28px 20px 80px;
}
.container.wide { max-width: 920px; }

/* ─── TYPOGRAPHY ───────────────────────────────────────────────── */
h1 {
  font-family: var(--font-serif);
  font-size: var(--fs-h1);
  font-weight: var(--fw-bold);
  letter-spacing: var(--tracking-tight);
  margin-bottom: 4px;
  color: var(--text-1);
  line-height: var(--leading-tight);
}
h2 {
  font-family: var(--font-serif);
  font-size: var(--fs-h2);
  font-weight: var(--fw-bold);
  margin-bottom: 12px;
  color: var(--text-1);
}
h3 {
  font-family: var(--font-serif);
  font-size: var(--fs-h3);
  font-weight: var(--fw-bold);
  margin-bottom: 10px;
  color: var(--text-1);
}
.eyebrow {
  font-family: var(--font-sans);
  font-size: var(--fs-overline);
  letter-spacing: var(--tracking-overline);
  text-transform: uppercase;
  color: var(--amber);
  font-weight: var(--fw-heavy);
  margin-bottom: 6px;
}
.subtitle {
  font-size: var(--fs-body);
  color: var(--muted);
  font-style: italic;
  padding-bottom: 18px;
  border-bottom: 2px solid var(--amber);
  margin-bottom: 28px;
}

/* ─── FOOTER ───────────────────────────────────────────────────── */
.site-footer {
  margin-top: 60px;
  padding: 24px 20px;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--muted);
  font-size: 0.78rem;
  font-family: var(--font-sans);
  letter-spacing: 1px;
}

@media (min-width: 640px) {
  .container { padding: 44px 40px 80px; }
  h1 { font-size: var(--fs-h1); }
}

/* ══════════════════════════════════════════════════════════════════
   DARK MODE — applied via /* Header stays navy-deep */
/* Worksheet container / page backgrounds */
/* Exercise sections */
/* Question items */
/* Inputs */
/* Choice buttons */
/* Submit/results */
/* Slide deck */
/* Headings */
/* Dark toggle — adapts to light/dark header */
.dark-toggle {
  background: transparent;
  border: 1.5px solid var(--hairline);
  color: var(--muted);
  font-family: var(--font-sans);
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .5px;
  padding: 5px 12px;
  border-radius: 3px;
  cursor: pointer;
  transition: background .15s, color .15s;
  white-space: nowrap;
}
.dark-toggle:hover {
  background: rgba(0,0,0,0.06);
  color: var(--ink);
}
/* Pin the toggle to the far right when it's a direct header child (no .header-utils wrapper) */
.site-header-inner > .dark-toggle { margin-left: auto; }

/* QR share button — same visual style as dark-toggle */
.qr-toggle {
  background: transparent;
  border: 1.5px solid var(--hairline);
  color: var(--muted);
  font-family: var(--font-sans);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: 1px;
  padding: 5px 10px;
  border-radius: 3px;
  cursor: pointer;
  transition: background .15s, color .15s;
  white-space: nowrap;
}
.qr-toggle:hover { background: rgba(0,0,0,0.06); color: var(--amber); border-color: var(--amber); }
body.dark .qr-toggle { border-color: rgba(255,255,255,.2); color: #F0F0F0; }
body.dark .qr-toggle:hover { background: rgba(255,255,255,.14); color: white; border-color: rgba(255,255,255,.2); }

/* QR modal overlay */
#wp-qr-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.72);
  align-items: center;
  justify-content: center;
  z-index: 9999;
}
.wp-qr-box {
  background: var(--paper);
  border-radius: 12px;
  padding: 28px 28px 24px;
  text-align: center;
  max-width: 280px;
  width: 88%;
  box-shadow: 0 8px 32px rgba(0,0,0,.35);
}
.wp-qr-img { border-radius: 6px; display: block; margin: 0 auto 14px; }
.wp-qr-url {
  font-family: var(--font-sans);
  font-size: .65rem;
  color: var(--muted);
  word-break: break-all;
  margin: 0 0 18px;
  line-height: 1.5;
}
.wp-qr-close {
  background: var(--amber);
  color: #1A1A1A;
  border: none;
  border-radius: 5px;
  padding: 8px 28px;
  font-family: var(--font-sans);
  font-size: .78rem;
  font-weight: 700;
  cursor: pointer;
}
.wp-qr-close:hover { opacity: .88; }
body.dark .wp-qr-box { background: #1E1E1E; }
body.dark .wp-qr-img { outline: 1px solid rgba(255,255,255,.12); }

/* Dark + QR connected pill group */
.header-utils { display: flex; gap: 0; flex-shrink: 0; }
.header-utils .dark-toggle {
  border-radius: 3px 0 0 3px;
  border-right: none;
}
.header-utils .qr-toggle {
  border-radius: 0 3px 3px 0;
  border-left: 1px solid rgba(255,255,255,.15);
  margin-left: 0;
}

/* ─── XP / LEVEL BADGE (clickable → dashboard) ──────────────────── */
.header-xp {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
  padding: 4px 10px;
  border: 1.5px solid var(--hairline);
  border-radius: 6px;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color .15s, color .15s;
}
.header-xp:hover { border-color: var(--amber); }
.header-xp:hover .header-xp-label,
.header-xp:hover .header-xp-go { color: var(--amber); }
.header-xp-go {
  font-family: var(--font-sans);
  font-size: .9rem;
  line-height: 1;
  color: var(--muted);
  transition: color .15s;
}
.header-xp-label {
  font-family: var(--font-sans);
  font-size: .62rem;
  font-weight: 700;
  letter-spacing: .5px;
  color: var(--muted-deep);
}
.header-xp-bar {
  width: 44px;
  height: 4px;
  background: var(--hairline);
  border-radius: 2px;
  overflow: hidden;
  flex-shrink: 0;
}
.header-xp-fill {
  height: 100%;
  background: var(--amber);
  border-radius: 2px;
  transition: width .4s ease;
}
body.dark .header-xp { border-color: rgba(255,255,255,.12); }
body.dark .header-xp-label { color: rgba(255,255,255,.5); }
body.dark .header-xp-go { color: rgba(255,255,255,.4); }
body.dark .header-xp-bar { background: rgba(255,255,255,.12); }
body.dark .header-xp:hover { border-color: var(--amber); }

/* ─── SIGN-IN BUTTON ──────────────────────────────────────────────── */
.header-signin-btn {
  font-size: .8rem;
  color: var(--amber);
  text-decoration: none;
  margin-left: auto;
  border: 1.5px solid var(--hairline);
  padding: 5px 12px;
  border-radius: 3px;
  cursor: pointer;
  transition: background .15s, border-color .15s, color .15s;
  font-family: var(--font-sans);
  font-weight: 600;
  white-space: nowrap;
}
.header-signin-btn:hover {
  background: rgba(0,0,0,0.06);
  border-color: var(--amber);
}
body.dark .header-signin-btn {
  color: var(--amber);
  border-color: rgba(255,255,255,.12);
}
body.dark .header-signin-btn:hover {
  background: rgba(255,255,255,.14);
  border-color: var(--amber);
}

/* ─── HEADER USER NAME BADGE (for logged-in teachers/admins) ────── */
.header-user-name {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  font-size: .85rem;
  color: var(--ink);
  font-weight: 600;
  padding: 4px 10px;
}
body.dark .header-user-name { color: var(--ink); }
.header-user-role {
  font-size: .62rem;
  font-weight: 700;
  letter-spacing: .5px;
  padding: 2px 6px;
  border: 1.5px solid var(--hairline);
  border-radius: 3px;
  color: var(--muted);
  text-transform: uppercase;
}
body.dark .header-user-role {
  border-color: rgba(255,255,255,.12);
  color: rgba(255,255,255,.6);
}

/* ─── SIGN-OUT BUTTON ────────────────────────────────────────────── */
.header-signout-btn {
  font-size: .8rem;
  font-weight: 600;
  padding: 5px 12px;
  border: 1.5px solid var(--line);
  border-radius: 3px;
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
  transition: background .15s, border-color .15s;
  font-family: var(--font-sans);
  white-space: nowrap;
}
.header-signout-btn:hover {
  background: var(--cream);
  border-color: var(--amber);
}
body.dark .header-signout-btn {
  background: var(--navy-mid);
  border-color: rgba(255,255,255,.12);
  color: var(--ink);
}
body.dark .header-signout-btn:hover {
  background: var(--navy-deep);
  border-color: var(--amber);
}

/* ─── SEARCH BUTTON ─────────────────────────────────────────────── */
.header-search-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 6px;
  border: 1.5px solid var(--hairline);
  color: var(--muted-deep);
  background: transparent;
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color .15s, color .15s;
}
.header-search-btn:hover { border-color: var(--amber); color: var(--amber); }
body.dark .header-search-btn { border-color: rgba(255,255,255,.18); color: rgba(255,255,255,.55); }
body.dark .header-search-btn:hover { border-color: var(--amber); color: var(--amber); }

/* ─── INLINE SEARCH (expands within the header bar) ─────────────────
   When open, the input fills the bar over the right-hand controls; only
   the brand stays visible. Results drop into the panel below. */
.header-search-inline {
  display: none;
  align-items: center;
  gap: 8px;
  flex: 1;
  margin-left: 12px;
}
.site-header-inner.searching .header-search-inline { display: flex; }
.site-header-inner.searching .header-search-btn,
.site-header-inner.searching .header-utils,
.site-header-inner.searching .header-xp { display: none !important; }
.header-search-inline input {
  flex: 1;
  min-width: 0;
  padding: 8px 12px;
  font-family: var(--font-sans);
  font-size: .9rem;
  border: 1.5px solid var(--hairline);
  border-radius: 6px;
  background: var(--cream-deep);
  color: var(--ink);
  outline: none;
}
.header-search-inline input:focus { border-color: var(--amber); }
body.dark .header-search-inline input {
  background: #1a1a1a; color: #f0f0f0; border-color: rgba(255,255,255,.18);
}
.header-search-close {
  flex-shrink: 0;
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  background: transparent; border: none;
  font-size: 1.25rem; line-height: 1;
  color: var(--muted); cursor: pointer; border-radius: 6px;
  transition: color .15s, background .15s;
}
.header-search-close:hover { color: var(--ink); background: rgba(0,0,0,.05); }
body.dark .header-search-close { color: rgba(255,255,255,.6); }
body.dark .header-search-close:hover { color: #fff; background: rgba(255,255,255,.1); }

/* ─── SEARCH RESULTS PANEL (below header) ───────────────────────── */
.header-search-panel {
  display: none;
  position: sticky;
  top: 0;
  z-index: 120;
  background: var(--paper);
  border-bottom: 1.5px solid var(--hairline);
  padding: 10px 20px;
  box-shadow: 0 4px 16px rgba(0,0,0,.08);
}
body.dark .header-search-panel {
  background: #111;
  border-bottom-color: rgba(255,255,255,.1);
  box-shadow: 0 4px 16px rgba(0,0,0,.4);
}
.header-search-input {
  width: 100%;
  max-width: 640px;
  display: block;
  padding: 9px 14px;
  font-family: var(--font-sans);
  font-size: .9rem;
  border: 1.5px solid var(--hairline);
  border-radius: 6px;
  background: var(--cream-deep);
  color: var(--ink);
  outline: none;
}
.header-search-input:focus { border-color: var(--amber); }
body.dark .header-search-input {
  background: #1a1a1a;
  color: #f0f0f0;
  border-color: rgba(255,255,255,.18);
}
body.dark .header-search-input:focus { border-color: var(--amber); }
.header-search-results {
  max-width: 640px;
  margin-top: 6px;
}
.sr-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 10px;
  border-radius: 5px;
  text-decoration: none;
  transition: background .12s;
}
.sr-item:hover { background: rgba(184,134,11,.08); }
body.dark .sr-item:hover { background: rgba(201,160,80,.1); }
.sr-title {
  font-family: var(--font-sans);
  font-size: .88rem;
  font-weight: 600;
  color: var(--ink);
}
.sr-meta {
  font-family: var(--font-sans);
  font-size: .72rem;
  color: var(--muted);
  white-space: nowrap;
}
.sr-empty {
  font-family: var(--font-sans);
  font-size: .82rem;
  color: var(--muted);
  padding: 8px 10px;
}
/* ─── MOBILE HEADER (≤560px) ──────────────────────────────────────
   Everything stays on one row: full brand top-left, then search · dark/QR ·
   level. The dark toggle shrinks to its ◐/◑ glyph (keeping the connected
   pill with QR) and the level badge tightens so QR stays visible. */
@media (max-width: 560px) {
  .site-header { padding: 10px 8px; }
  .site-header-inner { gap: 4px; }

  /* Brand keeps logo + wordmark, slightly smaller */
  .site-header a.brand, .site-header .brand { font-size: .92rem; }
  .site-header a.brand svg, .site-header .brand svg { margin-right: 5px !important; }

  /* Level badge → tight, label ellipsised for long level names */
  .header-xp { padding: 4px 6px; gap: 4px; }
  .header-xp-label { max-width: 42px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .header-xp-bar { width: 18px; }
  .header-xp-go { font-size: .85rem; }

  /* Dark toggle → glyph-only, but keeps the connected pill shape with QR */
  .header-utils .dark-toggle { font-size: 0; padding: 5px 7px; }
  .header-utils .dark-toggle::before { font-size: .95rem; content: "\25D0"; }
  body.dark .header-utils .dark-toggle::before { content: "\25D1"; }
  .header-utils .qr-toggle { padding: 5px 7px; }
}

/* ══════════════════════════════════════════════════════════════
   CHAPTER CARD — canonical design used on all section list pages
   ══════════════════════════════════════════════════════════════ */

.chapter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}
.chapter-card {
  background: var(--surface-2);
  border: 1.5px solid var(--line);
  border-radius: 12px;
  padding: 18px 20px 14px;
  cursor: pointer;
  transition: border-color .18s, box-shadow .18s, transform .14s;
  position: relative;
}
.chapter-card:not(.locked):hover {
  border-color: var(--amber);
  box-shadow: 0 6px 20px rgba(184,134,11,.12);
  transform: translateY(-2px);
}
.chapter-card.locked {
  background: var(--cream);
  cursor: default;
  opacity: 0.62;
}
.card-num {
  font-family: var(--font-sans);
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 5px;
}
.chapter-card h2 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy);
  margin: 0 0 6px;
  line-height: 1.3;
}
.chapter-card .desc {
  font-size: 0.82rem;
  color: var(--navy-light, var(--muted));
  line-height: 1.5;
  margin-bottom: 12px;
}
.card-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.card-actions a {
  font-family: var(--font-sans);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  padding: 4px 10px;
  border: 1.5px solid var(--hairline);
  border-radius: 3px;
  transition: background .15s, color .15s, border-color .15s;
}
.card-actions a:hover {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.locked-pill {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--navy-light, var(--muted));
  padding: 3px 8px;
  background: rgba(26,26,26,0.06);
  border-radius: 3px;
}
/* Section page layout */
.section-page { max-width: 960px; margin: 0 auto; padding: 24px 20px 48px; }
.section-title {
  font-family: var(--font-sans);
  font-size: var(--fs-overline);
  font-weight: var(--fw-heavy);
  letter-spacing: var(--tracking-overline);
  text-transform: uppercase;
  color: var(--amber);
  margin: 32px 0 14px;
}
.progress-strip {
  background: var(--surface-2);
  border: 1px solid rgba(26,26,26,0.12);
  border-radius: 8px;
  padding: 16px 20px;
  margin-bottom: 28px;
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
}
.prog-item { text-align: center; }
.prog-val {
  font-family: var(--font-sans);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--navy);
  line-height: 1;
}
.prog-label {
  font-family: var(--font-sans);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--navy-light, var(--muted));
  margin-top: 3px;
}

/* Breadcrumb */
.breadcrumb {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  color: var(--text-2);
  margin: 0 auto 20px;
  max-width: 800px;
  padding: 8px 20px 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}
.breadcrumb a { color: var(--text-2); text-decoration: none; }
.breadcrumb a:hover { color: var(--amber); text-decoration: underline; }
.breadcrumb strong { color: var(--text-1); }
.breadcrumb span { opacity: 0.5; }
/* Back affordance lives in the breadcrumb now (replaces the header arrow) */
.breadcrumb > a:first-child::before {
  content: '\2190';
  margin-right: 6px;
  font-weight: 700;
  color: var(--amber);
}

/* Dark mode for cards */
body.dark .chapter-card.locked { background: rgba(255,255,255,.04); }

/* ══════════════════════════════════════════════════════════════
   CHAPTER PAGE LAYOUT — consistent max-width and spacing
   ══════════════════════════════════════════════════════════════ */

/* All chapter content containers */
.container,
.slide-container,
.worksheet-container,
.game-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px 48px;
}

/* Chapter page h1 — consistent sizing */
.chapter-h1,
.container > h1,
.slide-container > h1,
.worksheet-container > h1 {
  font-size: 2rem;
  line-height: 1.15;
  color: var(--text-1);
  margin: 16px 0 6px;
}

/* Chapter-num pill — the "Ch 1" / "V3" label */
.chapter-num {
  font-family: var(--font-sans);
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 4px;
}

/* Subtitle line below H1 */
.chapter-subtitle {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: var(--text-2);
  margin: 0 0 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

/* ── Dark mode updates ── */
/* ══════════════════════════════════════════════════════════════
   PRINT — hide chrome, show content
   ══════════════════════════════════════════════════════════════ */
@media print {
  .site-header,
  .chapter-nav,
  .breadcrumb,
  .dark-toggle,
  .check-bar,
  .site-footer,
  .no-print {
    display: none !important;
  }
  body {
    background: white !important;
    color: #000 !important;
    font-size: 11pt;
  }
  .container,
  .exercise,
  .slide-card {
    max-width: 100% !important;
    margin: 0 !important;
    padding: 0 !important;
  }
  .slide { page-break-inside: avoid; }
  .q { page-break-inside: avoid; }
  a { color: inherit !important; text-decoration: none !important; }
}

/* ── Dark mode extras ── */
/* ── Worksheet corrective feedback ── */
.q.correct { background: rgba(39,174,96,0.04); border-radius: 6px; }
.q.wrong { background: rgba(192,57,43,0.04); border-radius: 6px; }
.correct-answer { border-color: #27ae60 !important; background: rgba(39,174,96,0.06) !important; }
.wrong-answer   { border-color: #c0392b !important; background: rgba(192,57,43,0.06) !important; }
.ws-feedback { display: block; margin-top: 4px; }

/* ── A1 vocabulary card ── */
.vocab-card {
  border: 1px solid var(--hairline);
  border-radius: 8px;
  padding: 18px 20px;
  background: var(--paper);
  cursor: pointer;
  transition: border-color .15s;
}
.vocab-card:hover { border-color: var(--ink); }
.vocab-card .card-num { color: var(--amber); }

/* ── Chapter card complete state ── */
.chapter-card.complete {
  border-color: var(--amber);
  background: rgba(184,134,11,0.04);
}
/* ── Worksheet corrective feedback (if not already present) ── */
.q.correct { background: rgba(39,174,96,0.04); border-radius: 6px; }
.q.wrong   { background: rgba(192,57,43,0.04); border-radius: 6px; }

/* ── Additional mobile breakpoints ── */
@media (max-width: 480px) {
  .breadcrumb { font-size: .72rem; }
  h1 { font-size: 2rem; }
  .container { padding: 28px 16px 60px; }
}
@media (max-width: 380px) {
  }



/* ── Section jump — card style ──────────────────────────────── */
.section-jump {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.section-jump a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  background: var(--paper);
  border: 1.5px solid var(--hairline);
  border-radius: 6px;
  font-family: var(--font-sans);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  transition: border-color .15s, background .15s;
}
.section-jump a:hover {
  border-color: var(--amber);
  background: rgba(184,134,11,0.05);
}
.section-jump a.fce-jump {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.section-jump a.fce-jump:hover {
  opacity: .85;
}

/* ── Writing Grader Feedback Panel ─────────────────────────────── */
.writing-feedback {
  border: 1px solid var(--hairline);
  border-radius: 6px;
  padding: 0;
  margin-top: 16px;
  overflow: hidden;
  font-family: var(--font-sans);
  font-size: .82rem;
}
.wg-header {
  background: var(--cream-deep);
  padding: 10px 14px;
  font-size: .65rem;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--hairline);
}
.wg-section {
  padding: 10px 14px;
  border-bottom: 1px solid var(--hairline);
}
.wg-section:last-child { border-bottom: 0; }
.wg-section-head {
  font-weight: 700;
  font-size: .72rem;
  letter-spacing: .5px;
  margin-bottom: 6px;
  color: var(--ink);
}
.wg-pos .wg-section-head { color: var(--green); }
.wg-issues .wg-section-head { color: var(--red); }
.wg-tips .wg-section-head { color: var(--amber); }
.wg-item {
  padding: 4px 0 4px 12px;
  border-left: 2px solid var(--hairline);
  margin-bottom: 5px;
  color: var(--ink);
  line-height: 1.5;
  font-size: .82rem;
}
.wg-pos .wg-item { border-left-color: var(--green); }
.wg-warn { border-left-color: var(--amber) !important; }
.wg-error { border-left-color: var(--red) !important; color: var(--red); }
.wg-tips .wg-item { border-left-color: var(--amber); }

/* Word counter pill */
.wc-pill {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 12px;
  font-family: var(--font-sans);
  font-size: .72rem;
  font-weight: 700;
  background: var(--hairline);
  color: var(--muted);
  transition: background .3s, color .3s;
}
.wc-pill.good  { background: rgba(46,125,82,.15); color: var(--green); }
.wc-pill.warn  { background: rgba(184,134,11,.15); color: var(--amber); }
.wc-pill.short { background: rgba(192,57,43,.12); color: var(--red); }

/* ── Card actions: first link = primary button, others = text links ──── */
.card-actions a:first-child {
  background: transparent;
  border-color: var(--hairline);
  color: var(--ink);
}
.card-actions a:not(:first-child) {
  border-color: transparent;
  color: var(--muted);
  padding: 4px 6px;
}
.card-actions a:not(:first-child):hover {
  background: transparent;
  border-color: transparent;
  color: var(--ink);
}

/* ── Context reading block (worksheets) ─────────────── */
.reading-context {
  background: var(--cream-deep);
  border-left: 3px solid var(--amber);
  border-radius: 4px;
  padding: 14px 18px;
  margin-bottom: 18px;
  font-size: .92rem;
  line-height: 1.75;
  color: var(--ink);
  font-family: Georgia, serif;
}

/* ─── WRITING RUBRIC ─────────────────────────────────────────── */
.wg-rubric {
  padding: 14px 16px;
  border-bottom: 1px solid var(--hairline);
  background: var(--cream-deep);
}
.wg-rubric-title {
  font-family: var(--font-sans);
  font-size: .65rem;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 10px;
}
.wg-rubric-grid { display: flex; flex-direction: column; gap: 6px; margin-bottom: 10px; }
.wg-rubric-row  { display: flex; align-items: center; gap: 10px; }
.wg-rubric-label {
  font-family: var(--font-sans);
  font-size: .72rem;
  font-weight: 700;
  color: var(--ink);
  min-width: 90px;
}
.wg-rubric-bar {
  flex: 1;
  height: 6px;
  background: var(--hairline);
  border-radius: 3px;
  overflow: hidden;
}
.wg-rubric-fill {
  height: 100%;
  border-radius: 3px;
  transition: width .5s ease;
}
.wg-rubric-score {
  font-family: var(--font-sans);
  font-size: .72rem;
  font-weight: 800;
  min-width: 30px;
  text-align: right;
}
.wg-rubric-total {
  font-family: var(--font-sans);
  font-size: .75rem;
  color: var(--muted);
  text-align: right;
}
/* ── Dark mode: additional text legibility fixes ── */
/* Preserve dark text on amber/navy buttons sitewide */


/* ══════════════════════════════════════════════════════════════════
   DARK MODE — Header, footer, common elements (Batch 21)
   ══════════════════════════════════════════════════════════════════ */

body.dark .site-header {
  background: #111111 !important;
  border-bottom-color: rgba(255,255,255,.08) !important;
  color: white !important;
}
body.dark .site-header .brand,
body.dark .site-header .brand * { color: #FFFFFF !important; }
/* Logo mark: WP stays legible in dark mode (white square → dark letters) */
body.dark .site-header .brand svg text { fill: #1A1A1A !important; }
body.dark .dark-toggle {
  background: rgba(255,255,255,.08) !important;
  color: #F0F0F0 !important;
  border-color: rgba(255,255,255,.2) !important;
}
body.dark .dark-toggle:hover {
  background: rgba(255,255,255,.14) !important;
  color: white !important;
}

body.dark .chapter-num      { color: var(--amber) !important; }
body.dark .chapter-subtitle { color: var(--text-2) !important; }
body.dark .chapter-nav { background: rgba(255,255,255,.04) !important; }
body.dark .chapter-nav-btn {
  color: #C0C0C0 !important;
  background: transparent !important;
}
body.dark .chapter-nav-btn.active {
  color: var(--amber) !important;
  border-bottom-color: var(--amber) !important;
  background: transparent !important;
}
body.dark .chapter-nav-btn:hover { color: #FFFFFF !important; }


body.dark .site-footer { color: #A0A0A0 !important; }

/* Preserve amber/navy CTA buttons */
body.dark a[style*="background:var(--amber)"],
body.dark a[style*="background: var(--amber)"],
body.dark button[style*="background:var(--amber)"] {
  color: #1A1A1A !important;
  background: var(--amber) !important;
}
body.dark a[style*="background:var(--navy)"],
body.dark button[style*="background:var(--navy)"] {
  color: #FFFFFF !important;
}

/* Respect reduced-motion preference */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}


/* ══ BACK TO TOP BUTTON ═══════════════════════════════════════════ */
#back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--amber);
  color: #1A1A1A;
  border: none;
  font-size: 1.2rem;
  font-weight: bold;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0,0,0,.25);
  z-index: 9999;
  transition: opacity .2s;
  font-family: system-ui;
}
#back-to-top:hover { background: #D4B060; transform: translateY(-2px); }
#back-to-top.visible { display: flex; }
body.dark #back-to-top { background: var(--amber); color: #1A1A1A; }
@media (max-width: 480px) {
  #back-to-top { width: 40px; height: 40px; bottom: 16px; right: 16px; }
}

/* ══════════════════════════════════════════════════════════════════
   CH-GRID — chapter cards on section list pages (grammar / vocab / writing)
   ══════════════════════════════════════════════════════════════════ */

.ch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
  margin: 24px 0 40px;
}

.ch-card {
  display: flex;
  flex-direction: column;
  padding: 20px 20px 16px;
  background: var(--surface-2);
  border: 1.5px solid var(--line);
  border-radius: 12px;
  text-decoration: none;
  transition: border-color .18s, box-shadow .18s, transform .14s;
  position: relative;
  overflow: hidden;
}
.ch-card:hover {
  border-color: var(--amber);
  box-shadow: 0 6px 20px rgba(184,134,11,.12);
  transform: translateY(-2px);
}

/* Section cards (Grammar / Vocabulary / Writing on level hub pages) */
.sect-card {
  display: block;
  background: var(--surface-2);
  border-radius: 12px;
  padding: 28px 24px;
  text-decoration: none;
  cursor: pointer;
  border: 1.5px solid var(--line);
  transition: transform .14s, box-shadow .18s, border-color .18s;
}
.sect-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(184,134,11,.12);
  border-color: var(--amber);
}
/* English hubs (no card eyebrow): title · description · chapter count */
html:not([lang="es"]) body:not(.dark) .sect-card > *:nth-child(1) { color: var(--ink) !important; }
html:not([lang="es"]) body:not(.dark) .sect-card > *:nth-child(2) { color: var(--muted-deep) !important; }
html:not([lang="es"]) body:not(.dark) .sect-card > *:nth-child(n+3) { color: var(--muted) !important; }
/* Card title + description in serif for an editorial, cohesive look */
html:not([lang="es"]) .sect-card > *:nth-child(1),
html:not([lang="es"]) .sect-card > *:nth-child(2) { font-family: var(--font-serif) !important; }

/* Spanish hubs (card eyebrow present): eyebrow · title · rest */
html[lang="es"] body:not(.dark) .sect-card > *:nth-child(1) { color: var(--amber) !important; }
html[lang="es"] body:not(.dark) .sect-card > *:nth-child(2) { color: var(--ink) !important; }
html[lang="es"] body:not(.dark) .sect-card > *:nth-child(n+3) { color: var(--muted) !important; }
.ch-card h2 {
  font-family: var(--font-serif);
  font-size: var(--fs-lead);
  font-weight: var(--fw-bold);
  color: var(--text-1);
  margin: 0 0 5px;
  line-height: var(--leading-snug);
}
.ch-num {
  font-family: var(--font-sans);
  font-size: var(--fs-overline);
  font-weight: var(--fw-heavy);
  letter-spacing: var(--tracking-overline);
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 7px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.ch-start {
  font-size: .52rem;
  font-weight: var(--fw-heavy);
  letter-spacing: 1px;
  background: var(--amber);
  color: #1A1A1A;
  padding: 1px 5px;
  border-radius: 2px;
}
.ch-desc {
  font-size: var(--fs-small);
  color: var(--text-3);
  line-height: var(--leading-normal);
  flex: 1;
  margin: 0 0 12px;
}
.ch-prog {
  height: 3px;
  background: var(--hairline);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 10px;
  display: none;
}
.ch-prog-fill {
  height: 100%;
  background: var(--amber);
  border-radius: 2px;
  transition: width .5s ease;
  width: 0%;
}
.ch-cta {
  font-family: var(--font-sans);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .8px;
  text-transform: uppercase;
  color: var(--amber);
}
.ch-card--done { border-color: rgba(184,134,11,.35); }
.ch-card--done::after {
  content: '✓';
  position: absolute;
  top: 14px; right: 14px;
  font-size: .75rem;
  font-weight: 800;
  color: var(--amber);
  font-family: var(--font-sans);
}
.ch-card--vocab .ch-cta { color: var(--amber); }

/* Dark mode */
body.dark .ch-card--done { border-color: rgba(201,160,80,.35); }

/* Section page subtitle */
.section-desc {
  font-family: var(--font-sans);
  font-size: .78rem;
  color: var(--muted);
  margin: 2px 0 0;
  letter-spacing: .2px;
}

@media (max-width: 520px) {
  .ch-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
}
@media (max-width: 360px) {
  .ch-grid { grid-template-columns: 1fr; }
}

/* ══════════════════════════════════════════════════════════════════
   ACTIVITY GRID — chapter hub pages (Lesson / Practice / Game / Printables)
   ══════════════════════════════════════════════════════════════════ */

.activity-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 28px;
  margin-bottom: 40px;
}
@media (min-width: 640px) { .activity-grid { grid-template-columns: repeat(4, 1fr); } }
@media (max-width: 380px) { .activity-grid { grid-template-columns: 1fr; } }

.activity-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 28px 20px 22px;
  background: var(--surface-2);
  border: 1.5px solid var(--line);
  border-radius: 12px;
  text-decoration: none;
  transition: box-shadow .18s, transform .14s, border-color .18s;
  position: relative;
}
.activity-card:hover {
  box-shadow: 0 6px 20px rgba(184,134,11,.12);
  border-color: var(--amber);
  transform: translateY(-2px);
}
.activity-card[data-done="1"] .ac-title::after {
  content: ' ✓';
  color: var(--amber);
}
.ac-icon { display: none !important; }
.ac-title {
  font-family: var(--font-serif);
  font-size: var(--fs-h3);
  font-weight: var(--fw-bold);
  color: var(--text-1);
  margin-bottom: 8px;
}
.ac-desc {
  font-size: var(--fs-small);
  color: var(--text-3);
  line-height: var(--leading-normal);
  flex: 1;
}
.ac-arrow {
  font-size: .9rem;
  color: var(--amber);
  margin-top: 10px;
  align-self: center;
}

/* Dark mode */
body.dark .activity-card:hover {
  border-color: var(--amber);
  box-shadow: 0 6px 20px rgba(184,134,11,.18);
}
body.dark .ac-arrow { color: var(--amber); }

/* Vocabulary chapter hubs (espanol/, francais/) use act-* names instead of
   activity-*. Same card shape, kept as its own class family rather than
   rewriting ~500 existing card instances across 122 files. */
.act-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 28px;
  margin-bottom: 40px;
}
@media (min-width: 640px) { .act-grid { grid-template-columns: repeat(4, 1fr); } }
@media (max-width: 380px) { .act-grid { grid-template-columns: 1fr; } }

.act-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 28px 20px 22px;
  background: var(--surface-2);
  border: 1.5px solid var(--line);
  border-radius: 12px;
  text-decoration: none;
  transition: box-shadow .18s, transform .14s, border-color .18s;
  position: relative;
}
.act-card:hover {
  box-shadow: 0 6px 20px rgba(184,134,11,.12);
  border-color: var(--amber);
  transform: translateY(-2px);
}
.act-title {
  font-family: var(--font-serif);
  font-size: var(--fs-h3);
  font-weight: var(--fw-bold);
  color: var(--text-1);
  margin-bottom: 8px;
}
.act-desc {
  font-size: var(--fs-small);
  color: var(--text-3);
  line-height: var(--leading-normal);
  flex: 1;
}
.act-cta {
  font-size: .9rem;
  color: var(--amber);
  margin-top: 10px;
  align-self: center;
}
body.dark .act-card:hover {
  border-color: var(--amber);
  box-shadow: 0 6px 20px rgba(184,134,11,.18);
}
body.dark .act-cta { color: var(--amber); }


/* ══════════════════════════════════════════════════════════════════
   CARD EXERCISE — one-question-at-a-time interactive grading
   ══════════════════════════════════════════════════════════════════ */
#card-exercise {
  max-width: 680px;
  margin: 24px auto 60px;
  padding: 0 20px;
}
.ce-progress-bar {
  height: 4px;
  background: var(--hairline);
  border-radius: 2px;
  margin-bottom: 10px;
  overflow: hidden;
}
.ce-progress-fill {
  height: 100%;
  background: var(--amber);
  transition: width .4s ease;
}
.ce-counter {
  font-family: var(--font-sans);
  font-size: .72rem;
  color: var(--muted);
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 18px;
  text-align: right;
}
.ce-card {
  background: var(--paper);
  border: 1.5px solid var(--hairline);
  border-top: 4px solid var(--amber);
  border-radius: 10px;
  padding: 24px 22px 20px;
}
.ce-question-num {
  font-family: var(--font-sans);
  font-size: .6rem;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 8px;
}
.ce-question-text {
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--ink);
  margin-bottom: 20px;
}
.ce-context {
  background: var(--cream-deep);
  border-left: 4px solid var(--amber);
  padding: 14px 16px;
  font-size: .9rem;
  line-height: 1.7;
  margin-bottom: 18px;
  border-radius: 0 6px 6px 0;
  color: var(--ink);
}
.ce-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.ce-option-btn {
  padding: 13px 16px;
  border: 1.5px solid var(--hairline);
  border-radius: 8px;
  text-align: left;
  font-size: .95rem;
  color: var(--ink);
  background: var(--paper);
  cursor: pointer;
  transition: border-color .15s, background .15s;
  font-family: inherit;
}
.ce-option-btn:hover:not(:disabled) {
  border-color: var(--amber);
  background: rgba(184,134,11,.06);
}
.ce-option-btn.ce-correct {
  border-color: #27ae60;
  background: rgba(39,174,96,.1);
  color: #1a5c35;
  font-weight: 700;
}
.ce-option-btn.ce-wrong {
  border-color: #c0392b;
  background: rgba(192,57,43,.08);
  color: #8b1a10;
}
.ce-option-btn:disabled { cursor: default; }
.ce-text-wrap {
  display: flex;
  gap: 8px;
  margin-bottom: 4px;
}
.ce-text-input {
  flex: 1;
  padding: 11px 13px;
  border: 1.5px solid var(--hairline);
  border-radius: 7px;
  font-size: .95rem;
  color: var(--ink);
  background: var(--paper);
  font-family: inherit;
}
.ce-text-input.ce-correct { border-color: #27ae60; background: rgba(39,174,96,.08); }
.ce-text-input.ce-wrong   { border-color: #c0392b; background: rgba(192,57,43,.06); }
.ce-check-btn {
  padding: 11px 18px;
  background: var(--ink);
  color: var(--paper);
  border-radius: 7px;
  font-family: var(--font-sans);
  font-size: .75rem;
  font-weight: 800;
  letter-spacing: 1px;
  cursor: pointer;
  white-space: nowrap;
  border: none;
}
.ce-feedback {
  margin-top: 16px;
  padding: 13px 16px;
  border-radius: 7px;
  font-size: .88rem;
  line-height: 1.55;
  display: none;
}
.ce-fb-correct {
  background: rgba(39,174,96,.1);
  border-left: 4px solid #27ae60;
  color: var(--ink);
}
.ce-fb-wrong {
  background: rgba(192,57,43,.06);
  border-left: 4px solid #c0392b;
  color: var(--ink);
}
.ce-next-btn {
  display: none;
  margin-top: 14px;
  padding: 13px 28px;
  background: var(--ink);
  color: var(--paper);
  border-radius: 7px;
  font-family: var(--font-sans);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: 1px;
  cursor: pointer;
  width: 100%;
  text-align: center;
  border: none;
  transition: opacity .15s;
}
.ce-next-btn:hover { opacity: .82; }
.ce-results {
  text-align: center;
  padding: 44px 20px;
}
.ce-results-score {
  font-size: 3.2rem;
  font-weight: 800;
  color: var(--ink);
  font-family: var(--font-sans);
  line-height: 1;
  margin-bottom: 4px;
}
.ce-results-pct {
  font-size: 1.3rem;
  color: var(--amber);
  font-family: var(--font-sans);
  font-weight: 700;
  margin-bottom: 6px;
}
.ce-results-msg {
  color: var(--muted);
  font-size: .9rem;
  margin-bottom: 28px;
}
.ce-results-cta {
  display: block;
  padding: 14px 28px;
  background: var(--amber);
  color: #1A1A1A;
  text-decoration: none;
  border-radius: 7px;
  font-family: var(--font-sans);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.ce-results-retry {
  display: block;
  width: 100%;
  padding: 12px;
  background: transparent;
  border: 1.5px solid var(--hairline);
  border-radius: 7px;
  font-family: var(--font-sans);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--ink);
  cursor: pointer;
}
/* Dark mode */
body.dark .ce-card { background: #141414; border-color: #2A2A2A; border-top-color: var(--amber); }
body.dark .ce-option-btn { background: #141414; border-color: #2A2A2A; color: #F0F0F0; }
body.dark .ce-option-btn:hover:not(:disabled) { border-color: var(--amber); }
body.dark .ce-option-btn.ce-correct { color: #70e09a; }
body.dark .ce-option-btn.ce-wrong   { color: #f08080; }
body.dark .ce-text-input { background: #141414; border-color: #2A2A2A; color: #F0F0F0; }
body.dark .ce-check-btn  { background: #F0F0F0; color: #1A1A1A; }
body.dark .ce-next-btn   { background: #F0F0F0; color: #1A1A1A; }
body.dark .ce-context { background: rgba(255,255,255,.05); color: #E0E0E0; }
body.dark .ce-fb-correct { background: rgba(39,174,96,.15); color: #E0F0E8; }
body.dark .ce-fb-wrong   { background: rgba(192,57,43,.12); color: #F0E0E0; }
body.dark .ce-results-retry { color: #E0E0E0; border-color: #2A2A2A; }