:root {
  /* Light mode (default) */
  --bg: #fffdf8;
  --bg-rgb: 255, 253, 248; /* ← används för semitransparent header */
  --text: #1d1c1c;
  --muted: #4e4c4c;
  --brand: #6a5cff;
  --brand-2: #00c2a8;
  --accent: #ffb703;
  --card: #ffffff;
  --shadow: 0 8px 24px rgba(0,0,0,0.08);
  --radius: 16px;

  /* New semantic colors */
  --surface: var(--card);
  --border: rgba(0,0,0,0.08);
  --border-strong: rgba(0,0,0,0.15);

  /* Unified spacing for cards & buttons */
  --space-1: 8px;
  --space-2: 12px;
  --space-3: 16px;
  --space-4: 20px;
  --space-5: 24px;
  --space-6: 32px;
  --space-8: 48px;
  
  /* Typography scale */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  
  /* Improved shadows */
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --shadow-xl: 0 12px 32px rgba(0,0,0,0.16);
}

/* Dark mode variables */
[data-theme="dark"] {
  --bg: #0f0f0f;
  --bg-rgb: 15, 15, 15; /* ← rätt bakgrund i sticky header */
  --text: #f5f5f5;
  --muted: #a0a0a0;
  --brand: #8b80ff;
  --brand-2: #00d6b3;
  --accent: #ffca28;
  --card: #1a1a1a;
  --shadow: 0 8px 24px rgba(0,0,0,0.4);

  /* Semantic colors for dark mode */
  --surface: #222;           /* lite ljusare än kortet för kontrast */
  --border: rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.2);
  
  /* Dark theme logo: brighten and increase contrast for visibility on dark background */
  --logo-filter: brightness(1.2) contrast(1.1) saturate(1.1);
}

/* Auto dark mode based on system preference */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f0f0f;
    --bg-rgb: 15, 15, 15;
    --text: #f5f5f5;
    --muted: #a0a0a0;
    --brand: #8b80ff;
    --brand-2: #00d6b3;
    --accent: #ffca28;
    --card: #1a1a1a;
    --shadow: 0 8px 24px rgba(0,0,0,0.4);
    --surface: #222;
    --border: rgba(255,255,255,0.08);
    --border-strong: rgba(255,255,255,0.2);
    --logo-filter: brightness(1.2) contrast(1.1) saturate(1.1);
  }
}

/* Dark theme logo styling */
[data-theme="dark"] .logo-img,
:root:not([data-theme="light"]) .logo-img {
  filter: var(--logo-filter, brightness(1.2) contrast(1.1) saturate(1.1));
}


* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: var(--font-size-base);
  transition: background-color 0.3s ease, color 0.3s ease;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Smooth transitions for theme change */
.card, .btn, input, textarea, select, .puzzle-card {
  transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease, box-shadow 0.2s ease, transform 0.05s ease;
}

/* Reduce motion for prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  html, body, .card, .btn, input, textarea, select, .puzzle-card {
    transition: none;
  }
  .theme-icon { transition: none; }
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  -webkit-backdrop-filter: saturate(140%) blur(6px); /* Safari support */
  backdrop-filter: saturate(140%) blur(6px);
  /* använd rgb-variabel för båda teman */
  background: rgba(var(--bg-rgb), 0.82);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  min-height: 80px;
}
.logo { 
  display: inline-flex; 
  align-items: center; 
  gap: 10px; 
  text-decoration: none; 
  line-height: 1;
}
.logo-img {
  height: 70px;
  width: auto;
  max-width: 300px;
  object-fit: contain;
  transition: filter 0.3s ease, opacity 0.3s ease;
  /* Light theme: full-color version on white/light background */
  filter: none;
}
.logo-text { 
  font-family: Fredoka, Inter, sans-serif; 
  font-weight: 700; 
  color: var(--text);
  /* Hide text when logo image is present */
  display: none;
}

/* Single-color/print version - can be applied via class or print media */
.logo-img.mono {
  filter: grayscale(100%) brightness(0) invert(1);
  /* For dark backgrounds: use: filter: grayscale(100%) brightness(0); */
}

/* Print styles - use single-color version */
@media print {
  .logo-img {
    filter: grayscale(100%) brightness(0);
    /* Black silhouette for print */
  }
  [data-theme="dark"] .logo-img {
    filter: grayscale(100%) brightness(0) invert(1);
    /* White silhouette for dark print backgrounds */
  }
}

/* Nav */
.nav { display: flex; gap: 12px; align-items: center; }
.nav a {
  text-decoration: none;
  color: var(--text);
  padding: 8px 12px;
  border-radius: 10px;
  outline: none;
}
.nav a:hover { background: rgba(0,0,0,0.05); }
[data-theme="dark"] .nav a:hover { background: rgba(255,255,255,0.08); }

/* tydliga focus-states */
.nav a:focus-visible,
.btn:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--brand) 70%, transparent);
  outline-offset: 2px;
  border-radius: 10px;
}

.nav .cta {
  background: var(--brand);
  color: #fff;
}

/* Language Switcher */
.lang-switcher {
  display: flex;
  gap: 4px;
  margin-right: 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2px;
  background: var(--surface);
}

.lang-btn {
  padding: 6px 12px;
  border: none;
  background: transparent;
  color: var(--text);
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  transition: all 0.2s ease;
  min-width: 36px;
}

.lang-btn:hover {
  background: var(--card);
}

.lang-btn.active {
  background: var(--brand);
  color: #fff;
}

.lang-btn[aria-pressed="true"] {
  background: var(--brand);
  color: #fff;
}

/* RTL Support */
[dir="rtl"] {
  direction: rtl;
}

[dir="rtl"] .site-header {
  flex-direction: row-reverse;
}

[dir="rtl"] .nav {
  flex-direction: row-reverse;
}

[dir="rtl"] .lang-switcher {
  margin-right: 0;
  margin-left: 8px;
}

[dir="rtl"] .theme-toggle {
  margin-right: 0;
  margin-left: 8px;
}

[dir="rtl"] .grid-2 {
  direction: rtl;
}

[dir="rtl"] .hero-actions {
  flex-direction: row-reverse;
}

[dir="rtl"] .check li {
  padding-left: 0;
  padding-right: 28px;
}

[dir="rtl"] .check li::before {
  left: auto;
  right: 0;
}


[dir="rtl"] .floating-cta {
  right: auto;
  left: 24px;
}

@media (max-width: 760px) {
  [dir="rtl"] .floating-cta {
    left: 16px;
    right: auto;
  }
}

/* Theme Toggle Button */
.theme-toggle {
  width: 40px;
  height: 40px;
  padding: 8px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: all 0.3s ease;
  margin-right: 8px;
  border: 1px solid var(--border);
  background: transparent;
}
.theme-toggle:hover {
  transform: scale(1.06);
  background: var(--surface);
}
[data-theme="dark"] .theme-icon { transform: rotate(180deg); }
.theme-icon { transition: transform 0.5s ease; }

/* Hero */
.hero { 
  padding: var(--space-8) 16px; 
  background: linear-gradient(180deg, 
    color-mix(in srgb, var(--brand) 8%, transparent) 0%, 
    color-mix(in srgb, var(--brand) 3%, transparent) 50%,
    var(--bg) 100%);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, color-mix(in srgb, var(--brand) 15%, transparent) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}
.hero-inner { 
  max-width: 1200px; 
  margin: 0 auto; 
  display: grid; 
  gap: var(--space-6); 
  align-items: center; 
  grid-template-columns: 1.2fr 0.8fr; 
  position: relative;
  z-index: 1;
}
.hero h1 { 
  font-family: Fredoka, Inter, sans-serif; 
  font-weight: 700; 
  font-size: clamp(32px, 4vw, 56px); 
  margin: 0 0 var(--space-4) 0;
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.lead { 
  font-size: var(--font-size-lg); 
  color: var(--muted); 
  line-height: 1.7;
  margin-bottom: var(--space-4);
}
.hero-actions { 
  display: flex; 
  gap: var(--space-3); 
  flex-wrap: wrap; 
  margin-top: var(--space-5);
}
.hero-ill { 
  display: flex; 
  gap: var(--space-4); 
  align-items: center; 
  justify-content: center; 
  flex-wrap: wrap;
}
.hero-ill img { 
  width: 80px; 
  height: 80px; 
  filter: drop-shadow(var(--shadow-lg)); 
  background: var(--surface); 
  border-radius: 16px; 
  padding: 12px;
  transition: transform 0.3s ease;
}
.hero-ill img:hover {
  transform: scale(1.1) rotate(5deg);
}

.start-section {
  position: relative;
}

.start-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-5);
  align-items: start;
}

.quiz-card,
.quiz-result,
.path-card {
  min-height: 100%;
}

.quiz-fields {
  display: grid;
  gap: var(--space-3);
}

.quiz-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-top: var(--space-4);
}

.eyebrow {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: var(--space-2);
}

.quiz-result {
  background:
    linear-gradient(160deg, color-mix(in srgb, var(--brand) 10%, transparent) 0%, transparent 55%),
    var(--card);
}

.quiz-result.is-empty .check {
  display: none;
}

.compact li {
  margin: var(--space-2) 0;
}

.learning-paths {
  margin-top: var(--space-6);
}

.path-card {
  position: relative;
}

.path-card .meta {
  margin-top: auto;
}

.faq-list {
  max-width: 900px;
  margin: 0 auto;
  display: grid;
  gap: var(--space-3);
}

.faq-item {
  border: 1px solid var(--border);
  background: var(--card);
  border-radius: 14px;
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
}

.faq-item summary {
  cursor: pointer;
  font-weight: 700;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item p {
  margin: var(--space-3) 0 0;
  color: var(--muted);
}

.journey-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-5);
  align-items: start;
}

.journey-card,
.journey-cta-card {
  min-height: 100%;
}

.journey-card {
  background:
    linear-gradient(165deg, color-mix(in srgb, var(--brand-2) 9%, transparent) 0%, transparent 45%),
    var(--card);
}

.journey-steps {
  display: grid;
  gap: var(--space-4);
}

.journey-step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-3);
  align-items: start;
}

.journey-step-number {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), color-mix(in srgb, var(--brand-2) 70%, var(--brand)));
  box-shadow: var(--shadow-sm);
}

.journey-step h3 {
  margin-bottom: var(--space-2);
}

.journey-step p {
  margin-bottom: 0;
  color: var(--muted);
}

.journey-cta-card {
  background:
    linear-gradient(160deg, color-mix(in srgb, var(--accent) 16%, transparent) 0%, transparent 48%),
    var(--card);
}

/* Sections */
.section { 
  padding: var(--space-8) 16px; 
}
@media (max-width: 760px) {
  .section { padding: var(--space-6) 16px; }
}
.container { 
  max-width: 1200px; 
  margin: 0 auto; 
  padding: 0 var(--space-3);
}
@media (min-width: 1400px) {
  .container { max-width: 1400px; }
}
.grid-2 { 
  display: grid; 
  gap: var(--space-6); 
  grid-template-columns: 1fr 1fr; 
  align-items: start; 
}

/* Section intro text - applies to first paragraph after h2 in sections */
.section > .container > h2 {
  font-size: clamp(var(--font-size-2xl), 3.5vw, var(--font-size-4xl));
  margin-bottom: var(--space-4);
  text-align: center;
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.section > .container > h2 + p {
  text-align: center;
  color: var(--muted);
  margin-bottom: var(--space-6);
  max-width: 750px;
  margin-left: auto;
  margin-right: auto;
  font-size: var(--font-size-lg);
  line-height: 1.7;
}

/* Cards */
.cards { 
  display: grid; 
  gap: var(--space-4); 
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); 
}
@media (min-width: 900px) {
  .cards { gap: var(--space-5); }
}
.card { 
  background: var(--card); 
  border-radius: var(--radius); 
  padding: var(--space-5); 
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s ease, border-color 0.3s ease;
  display: flex;
  flex-direction: column;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: var(--brand);
}
[data-theme="dark"] .card:hover {
  box-shadow: 0 16px 40px rgba(0,0,0,0.7);
}
.card h3 {
  margin-top: 0;
  margin-bottom: var(--space-3);
  font-size: var(--font-size-xl);
  line-height: 1.3;
}
.card > p {
  flex-grow: 1;
  margin-bottom: var(--space-3);
}
.card.soft { 
  background: var(--surface); 
  border: 2px dashed var(--brand);
  opacity: 0.95;
  position: relative;
}
.card.soft::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, color-mix(in srgb, var(--brand) 5%, transparent) 0%, transparent 100%);
  border-radius: var(--radius);
  pointer-events: none;
  z-index: 0;
}
.card.soft > * {
  position: relative;
  z-index: 1;
}
.card h3 { 
  margin-top: 0; 
  margin-bottom: var(--space-2);
  font-family: Fredoka, Inter, sans-serif; 
}
.card p { margin-top: 0; margin-bottom: var(--space-2); }
.meta { 
  color: var(--muted); 
  padding-left: var(--space-4); 
  margin-bottom: var(--space-4);
  list-style: none;
}
.meta li { 
  margin-bottom: var(--space-2);
  position: relative;
  padding-left: var(--space-4);
}
.meta li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--brand-2);
  font-weight: 700;
}
.meta li strong { 
  color: var(--text); 
  font-weight: 600; 
}

/* Lists */
.check { 
  list-style: none; 
  padding: 0; 
  margin: var(--space-4) 0; 
}
.check li { 
  padding-left: var(--space-6); 
  position: relative; 
  margin: var(--space-3) 0;
  line-height: 1.6;
}
.check li::before { 
  content: "✓"; 
  position: absolute; 
  left: 0;
  color: var(--brand-2);
  font-weight: 700;
  font-size: var(--font-size-lg);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: color-mix(in srgb, var(--brand-2) 15%, transparent);
  border-radius: 50%;
}

/* Buttons */
.btn { 
  display: inline-flex; 
  align-items: center; 
  justify-content: center; 
  gap: var(--space-2); 
  padding: 12px 20px; 
  border-radius: 12px; 
  border: 2px solid var(--border); 
  background: var(--surface); 
  color: var(--text); 
  text-decoration: none; 
  cursor: pointer; 
  min-height: 44px;
  font-size: var(--font-size-base);
  font-weight: 600;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap;
}
.btn:hover { 
  box-shadow: var(--shadow-md); 
  transform: translateY(-2px);
}
.btn:active { 
  transform: translateY(0); 
}
.btn.primary { 
  background: var(--brand); 
  color: #fff; 
  border-color: var(--brand); 
  box-shadow: var(--shadow-sm);
}
.btn.primary:hover {
  background: color-mix(in srgb, var(--brand) 90%, black 10%);
  border-color: color-mix(in srgb, var(--brand) 90%, black 10%);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}
.btn.ghost { 
  background: transparent; 
  border-color: var(--border-strong);
}
.btn.ghost:hover {
  background: var(--surface);
  border-color: var(--brand);
  color: var(--brand);
}

/* Puzzle */
.puzzle-ui { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-bottom: 12px; }
.puzzle-card { 
  background: var(--card); 
  border: 1px solid var(--border); 
  border-radius: var(--radius); 
  padding: 16px; 
  box-shadow: var(--shadow); 
}
#puzzle-title { font-family: Fredoka, Inter, sans-serif; margin-top: 0; }
#puzzle-text { margin-top: 0; }
#puzzle-answer { 
  width: 100%; 
  min-height: 80px; 
  border-radius: 10px; 
  padding: 10px; 
  border: 1px solid var(--border-strong); 
  font-family: inherit;
  background: var(--surface);
  color: var(--text);
}
.puzzle-actions { display: flex; gap: 8px; margin-top: 8px; flex-wrap: wrap; }
.feedback { min-height: 24px; color: var(--brand-2); font-weight: 600; }

/* Form */
.form { display: grid; gap: 12px; }
.field { display: grid; gap: 6px; }
input, textarea, select { 
  font: inherit; 
  padding: 10px; 
  border-radius: 10px; 
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
}

/* Honeypot field - hidden from users but visible to bots */
input[name="hp"] {
  display: none;
  position: absolute;
  left: -9999px;
  opacity: 0;
  pointer-events: none;
}
input:focus, textarea:focus, select:focus { outline: 2px solid var(--brand); }
.form-note { color: var(--brand-2); font-weight: 600; }
.contact-meta { color: var(--muted); margin-top: 12px; }

/* Footer */
.site-footer { 
  padding: 24px 16px; 
  border-top: 1px solid var(--border); 
  text-align: center; 
  color: var(--muted); 
}

/* ===== Loading States ===== */
.loading { position: relative; pointer-events: none; opacity: 0.7; }
.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 16px;
  margin: -8px 0 0 -8px;
  border: 2px solid var(--surface);
  border-top: 2px solid var(--brand);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

.loading-text::after { content: '...'; animation: dots 1.5s steps(4, end) infinite; }
@keyframes dots { 0%, 20% { content: '.'; } 40% { content: '..'; } 60%, 100% { content: '...'; } }

.puzzle-loading {
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 12px;
  color: var(--muted);
}
.loading-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--surface);
  border-top: 3px solid var(--brand);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* ===== Header & Nav – mobilfix ===== */
.nav-toggle {
  display: none;
  width: 40px; 
  height: 40px;
  border: 0; 
  background: transparent; 
  cursor: pointer;
  border-radius: 10px;
}
.nav-toggle:focus { outline: 2px solid var(--brand); }
.nav-toggle .bar {
  display: block; 
  width: 22px; 
  height: 2px; 
  margin: 5px auto;
  background: var(--text); 
  border-radius: 2px;
}

/* Desktop: oförändrat – nav horisontellt */
.site-header { position: sticky; top: 0; z-index: 50; }

/* Mobilmeny (≤ 760px): fäll in menyn bakom en knapp */
@media (max-width: 760px) {
  .site-header {
    padding: 10px 16px;
    min-height: 70px;
  }
  .nav-toggle { 
    display: inline-flex; 
    align-items: center; 
    justify-content: center; 
  }
  .nav {
    position: absolute; 
    top: 70px; 
    right: 12px; 
    left: 12px;
    display: none; 
    flex-direction: column; 
    gap: 6px;
    background: var(--card); 
    border: 1px solid var(--border);
    border-radius: 12px; 
    box-shadow: var(--shadow); 
    padding: 8px;
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px; border-radius: 10px; }
  .nav .cta { text-align: center; }
  body.no-scroll { overflow: hidden; }

  /* Adjust theme toggle for mobile */
  .theme-toggle { margin-right: 4px; }
}

/* ===== Hero – knappar & spacing på mobil ===== */
@media (max-width: 760px) {
  .hero { 
    padding-top: var(--space-6); 
    padding-bottom: var(--space-6); 
  }
  .hero-inner {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }
  .hero-actions { 
    gap: var(--space-2); 
    flex-direction: column;
  }
  .hero-actions .btn { 
    width: 100%; 
  }
  .hero-ill {
    justify-content: center;
  }
  .hero-ill img {
    width: 64px;
    height: 64px;
  }
}

/* Ikonraden i heron – låt den brytas snyggt */
.hero-ill img { max-width: 64px; max-height: 64px; }

/* ===== Små typografijusteringar ===== */
@media (max-width: 360px) {
  .nav a { font-size: 15px; }
  .logo-text { font-size: 16px; }
}

/* Tablet: slightly smaller header and logo */
@media (max-width: 900px) {
  .logo-img { 
    height: 60px;
    max-width: 250px;
  }
}

/* Mobile: smaller logo but still visible */
@media (max-width: 760px) {
  .logo-img { 
    height: 50px;
    max-width: 200px;
  }
}

/* ===== Hero Math Section ===== */
.hero-math { margin-top: 16px; }
.hero-math-title {
  font-size: clamp(18px, 2.4vw, 22px);
  margin: 0 0 4px 0;
  font-family: Fredoka, Inter, sans-serif;
  font-weight: 600;
}
.hero-math-sub { margin: 0; color: var(--muted); font-size: clamp(14px, 2vw, 16px); }

/* Optional: skeleton loading on puzzle card */
.puzzle-card.loading {
  background: linear-gradient(90deg, var(--surface) 25%, color-mix(in srgb, var(--surface) 80%, transparent) 50%, var(--surface) 75%);
  background-size: 200% 100%;
  animation: loading-shine 1.5s infinite;
}
@keyframes loading-shine { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* Booking Section */
#booking-title { 
  text-align: center; 
  margin-bottom: var(--space-5); 
  font-size: clamp(var(--font-size-2xl), 3vw, var(--font-size-3xl));
}
.booking-container {
  max-width: 1000px;
  margin: 0 auto;
}
.calendar-booking-wrapper {
  margin-bottom: var(--space-6);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--card);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.calendar-booking-wrapper:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}
.calendar-booking-content {
  padding: var(--space-8) var(--space-6);
  text-align: center;
  background: linear-gradient(135deg, color-mix(in srgb, var(--brand) 10%, transparent) 0%, color-mix(in srgb, var(--brand) 5%, transparent) 50%, var(--card) 100%);
}
@media (max-width: 760px) {
  .calendar-booking-content {
    padding: var(--space-6) var(--space-4);
  }
}
.calendar-booking-content h3 {
  font-family: Fredoka, Inter, sans-serif;
  font-size: clamp(var(--font-size-2xl), 3vw, 32px);
  margin: 0 0 var(--space-4) 0;
  color: var(--text);
  line-height: 1.3;
}
.calendar-booking-content > p:first-of-type {
  color: var(--muted);
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-6);
  max-width: 650px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}
.booking-embed {
  margin: var(--space-5) 0;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--card);
  box-shadow: var(--shadow-md);
}
.booking-embed-frame {
  display: block;
  width: 100%;
  min-height: 680px;
  border: 0;
  background: #fff;
}
.booking-actions {
  display: flex;
  justify-content: center;
  margin-top: var(--space-4);
}
.booking-btn-large {
  font-size: var(--font-size-lg);
  padding: 18px 48px;
  margin: var(--space-5) 0;
  display: inline-block;
  font-weight: 700;
  min-height: 56px;
}
@media (max-width: 760px) {
  .booking-embed-frame {
    min-height: 600px;
  }
  .booking-btn-large {
    font-size: var(--font-size-base);
    padding: 16px 32px;
    width: 100%;
    max-width: 400px;
  }
}
.booking-note {
  margin-top: 24px;
  font-size: 14px;
  color: var(--muted);
  font-style: italic;
}
.booking-info-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-6);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}
.booking-info-cards .card {
  text-align: center;
  padding: var(--space-5);
}
.booking-info-cards .card h3 {
  margin-bottom: var(--space-3);
  font-size: var(--font-size-lg);
  color: var(--brand);
}
.booking-info-cards .card p {
  color: var(--muted);
  line-height: 1.6;
}
.cta-wrapper {
  margin-top: var(--space-5);
}
.trust-card {
  margin-top: var(--space-5);
}
.trust-card h3 {
  color: var(--brand);
}

/* Floating CTA Button */
.floating-cta {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 100;
  background: var(--brand);
  color: #fff;
  padding: 16px 24px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  box-shadow: 0 4px 16px rgba(106, 92, 255, 0.4);
  display: flex;
  align-items: center;
  gap: 8px;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s ease, opacity 0.3s ease;
  animation: pulse 2s ease-in-out infinite;
  opacity: 0;
  pointer-events: none;
  transform: translateY(20px);
}
.floating-cta.visible {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}
.floating-cta:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 6px 24px rgba(106, 92, 255, 0.5);
}
.floating-cta:active {
  transform: translateY(0) scale(1);
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 4px 16px rgba(106, 92, 255, 0.4); }
  50% { box-shadow: 0 4px 20px rgba(106, 92, 255, 0.6); }
}
[data-theme="dark"] .floating-cta {
  box-shadow: 0 4px 16px rgba(139, 128, 255, 0.5);
}
[data-theme="dark"] .floating-cta:hover {
  box-shadow: 0 6px 24px rgba(139, 128, 255, 0.7);
}

/* Smooth scroll offset */
html {
  scroll-behavior: smooth;
}
section[id] {
  scroll-margin-top: 100px;
}

/* Responsive */
@media (max-width: 900px) {
  .hero-inner { 
    grid-template-columns: 1fr; 
    gap: var(--space-5);
  }
  .journey-grid,
  .start-grid {
    grid-template-columns: 1fr;
  }
  .grid-2 { 
    grid-template-columns: 1fr; 
    gap: var(--space-5);
  }
  .floating-cta {
    bottom: 16px;
    right: 16px;
    padding: 14px 20px;
    font-size: var(--font-size-sm);
  }
  .cards {
    grid-template-columns: 1fr;
  }
  .quiz-actions {
    flex-direction: column;
  }
  .quiz-actions .btn {
    width: 100%;
  }
}

/* Tablet optimizations */
@media (min-width: 761px) and (max-width: 1024px) {
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .container {
    padding: 0 var(--space-4);
  }
}

@media (max-width: 480px) {
  .floating-cta {
    bottom: 16px;
    right: 16px;
    padding: 12px 18px;
    font-size: var(--font-size-xs);
  }
  .hero h1 {
    font-size: clamp(28px, 6vw, 40px);
  }
  .section {
    padding: var(--space-5) 12px;
  }
  .container {
    padding: 0 var(--space-2);
  }
}

/* ===== Payments page styles ===== */
.payments-container { max-width: 820px; margin: 40px auto; padding: 16px; }
.payment-card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 28px; text-align: center; box-shadow: var(--shadow-md); }
.swish-number { font-size: 28px; font-weight: 800; letter-spacing: 0.02em; margin: 12px 0; color: var(--text); }
.copy-btn { margin-top: 8px; }
.swish-instructions { color: var(--muted); margin-top: 12px; }

.qr-wrapper { display:flex; justify-content:center; align-items:center; flex-direction:column; gap:12px; }
.swish-qr {
  width: min(42vw, 420px);
  max-width: 480px;
  height: auto;
  border-radius: 12px;
  background: #fff;
  padding: 14px;
  box-shadow: var(--shadow-sm);
  display: block;
}
.swish-ref-label { display:block; margin-top: 12px; color: var(--muted); }
.swish-ref { width: 100%; max-width: 560px; margin: 8px auto 0 auto; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--border-strong); background: var(--surface); color: var(--text); }

/* Mobile: make QR smaller and centered */
@media (max-width: 760px) {
  .swish-qr { width: min(70vw, 260px); padding: 10px; border-radius: 10px; }
  .swish-ref { max-width: 100%; }
}

/* Large screens: give QR a bit more presence */
@media (min-width: 1200px) {
  .swish-qr { width: min(28vw, 520px); max-width: 520px; padding: 18px; }
}

@media (max-width: 480px) {
  .payments-container { margin: 20px 12px; padding: 12px; }
  .payment-card { padding: 18px; }
  .swish-number { font-size: 22px; }
  .payment-card .btn { width: 100%; max-width: 360px; }
  .payment-card .btn + .btn { margin-top: 8px; }
}


/* Interactive mini-labs */
.mini-labs-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 28px;
}

.mini-lab {
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow: hidden;
  position: relative;
}

.mini-lab::before {
  content: "";
  position: absolute;
  inset: auto -20% -35% auto;
  width: 220px;
  height: 220px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(106,92,255,.24), transparent 65%);
  pointer-events: none;
}

.lab-window-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.lab-window-dots {
  display: inline-flex;
  gap: 6px;
}

.lab-window-dots span {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: rgba(255,255,255,.2);
}

.lab-challenge-tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.lab-tab {
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.03);
  color: var(--text);
  border-radius: 999px;
  padding: 10px 14px;
  font-weight: 600;
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}

.lab-tab:hover,
.lab-tab.is-active {
  transform: translateY(-1px);
  border-color: rgba(106,92,255,.45);
  background: rgba(106,92,255,.12);
}

.lab-window,
.math-machine {
  position: relative;
  border-radius: 28px;
  border: 1px solid rgba(255,255,255,.08);
  background:
    radial-gradient(circle at top left, rgba(106,92,255,.14), transparent 34%),
    radial-gradient(circle at bottom right, rgba(0,214,179,.10), transparent 38%),
    linear-gradient(180deg, rgba(9,13,28,.98), rgba(13,18,35,.94));
  box-shadow: 0 26px 60px rgba(0,0,0,.24), inset 0 1px 0 rgba(255,255,255,.04);
}

.lab-window--game {
  display: grid;
  grid-template-columns: minmax(300px, 1.15fr) minmax(280px, .95fr);
  gap: 18px;
  padding: 18px;
  align-items: stretch;
}

.code-stage-panel,
.lab-side--game,
.math-side-panel {
  border-radius: 24px;
  border: 1px solid rgba(255,255,255,.08);
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  box-shadow: inset 0 1px 0 rgba(255,255,255,.04);
}

.code-stage-panel {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 14px;
}

.lab-stage-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.lab-stage-avatar {
  width: 54px;
  height: 54px;
  display: grid;
  place-items: center;
  border-radius: 18px;
  font-size: 1.6rem;
  background: linear-gradient(180deg, rgba(255,183,3,.18), rgba(106,92,255,.14));
  border: 1px solid rgba(255,255,255,.12);
  box-shadow: 0 10px 24px rgba(0,0,0,.18);
}

.lab-stage-status-stack {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.lab-stage-chip,
.lab-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.04);
  color: var(--text);
  font-size: .95rem;
}

.code-board-shell {
  position: relative;
  border-radius: 24px;
  padding: 10px;
  background: radial-gradient(circle at 50% 0%, rgba(0,214,179,.14), transparent 38%), linear-gradient(180deg, rgba(3,11,30,.95), rgba(9,16,38,.95));
  border: 1px solid rgba(106,92,255,.14);
  min-height: 0;
}

.code-board {
  display: grid;
  gap: 8px;
  border-radius: 20px;
  padding: 12px;
  min-height: 320px;
  background:
    linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02)),
    repeating-linear-gradient(90deg, rgba(255,255,255,.03) 0, rgba(255,255,255,.03) 1px, transparent 1px, transparent calc(20% - 1px)),
    repeating-linear-gradient(180deg, rgba(255,255,255,.02) 0, rgba(255,255,255,.02) 1px, transparent 1px, transparent calc(20% - 1px));
}

.code-cell {
  aspect-ratio: 1 / 1;
  border-radius: 18px;
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, rgba(32,46,86,.92), rgba(20,28,54,.88));
  border: 1px solid rgba(255,255,255,.06);
  font-size: clamp(1rem, 1.6vw, 1.4rem);
  box-shadow: inset 0 -8px 14px rgba(0,0,0,.22), inset 0 1px 0 rgba(255,255,255,.05);
  transition: transform .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.code-cell.is-even {
  background: linear-gradient(180deg, rgba(27,40,80,.96), rgba(17,25,49,.9));
}

.code-cell.is-robot {
  background: linear-gradient(180deg, rgba(121,112,255,.32), rgba(73,57,186,.24));
  border-color: rgba(146,134,255,.62);
  box-shadow: 0 0 0 2px rgba(106,92,255,.18), 0 12px 24px rgba(0,0,0,.22), inset 0 1px 0 rgba(255,255,255,.08);
  transform: translateY(-2px) scale(1.02);
}

.code-cell.is-goal {
  background: linear-gradient(180deg, rgba(255,202,40,.22), rgba(255,164,0,.14));
  border-color: rgba(255,202,40,.44);
}

.code-cell.is-gem {
  background: linear-gradient(180deg, rgba(0,214,179,.22), rgba(0,214,179,.12));
  border-color: rgba(0,214,179,.32);
}

.code-cell.is-portal {
  background: linear-gradient(180deg, rgba(168,85,247,.22), rgba(109,40,217,.14));
  border-color: rgba(168,85,247,.34);
}

.code-cell.is-block {
  background: linear-gradient(180deg, rgba(64,73,102,.65), rgba(34,39,58,.72));
  border-color: rgba(255,255,255,.14);
  color: rgba(255,255,255,.52);
}

.lab-side,
.math-machine {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.lab-side--game {
  padding: 16px;
  justify-content: space-between;
}

.lab-brief {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 14px;
  border-radius: 20px;
  border: 1px solid rgba(255,255,255,.08);
  background: rgba(255,255,255,.03);
}

.lab-meta {
  margin: 0;
  color: var(--muted);
}

.command-sequence,
.math-history {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  min-height: 56px;
}

.command-sequence--panel {
  border-radius: 18px;
  padding: 10px;
  background: rgba(7,10,22,.45);
  border: 1px solid rgba(255,255,255,.06);
}

.command-empty,
.math-history-empty,
.math-chip--empty {
  width: 100%;
  padding: 14px;
  border-radius: 16px;
  border: 1px dashed rgba(255,255,255,.14);
  color: var(--muted);
  background: rgba(255,255,255,.02);
}

.command-chip,
.math-chip {
  border-radius: 999px;
  border: 1px solid rgba(106, 92, 255, .35);
  background: rgba(106, 92, 255, .12);
  color: var(--text);
  padding: 8px 12px;
  font-weight: 600;
}

.command-chip { cursor: pointer; }

.control-dock {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.lab-arrow-controls--pad {
  display: grid;
  grid-template-columns: repeat(3, 64px);
  justify-content: center;
  gap: 10px;
  padding: 16px;
  border-radius: 22px;
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.08);
}

.pad-spacer {
  width: 64px;
  height: 64px;
}

.cmd-pad-core {
  width: 64px;
  height: 64px;
  display: grid;
  place-items: center;
  border-radius: 20px;
  background: radial-gradient(circle, rgba(0,214,179,.22), rgba(106,92,255,.12));
  border: 1px solid rgba(255,255,255,.08);
  color: rgba(255,255,255,.8);
  font-size: 1.25rem;
}

.cmd-btn,
.op-btn {
  border: 1px solid rgba(255,255,255,.12);
  background: linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.04));
  color: var(--text);
  border-radius: 18px;
  min-width: 60px;
  min-height: 60px;
  font-size: 1.25rem;
  font-weight: 700;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.05), 0 10px 20px rgba(0,0,0,.18);
  transition: transform .2s ease, border-color .2s ease, background .2s ease;
}

.cmd-btn:hover,
.op-btn:hover,
.cmd-btn:focus-visible,
.op-btn:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(106,92,255,.5);
  background: linear-gradient(180deg, rgba(106,92,255,.22), rgba(106,92,255,.10));
}

.lab-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.lab-actions--stacked {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.lab-actions--stacked .btn {
  width: 100%;
  justify-content: center;
}

.math-machine--game {
  padding: 18px;
}

.math-display-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.math-display-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px;
  border-radius: 20px;
  border: 1px solid rgba(255,255,255,.08);
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03));
}

.math-display-card span {
  color: var(--muted);
  font-size: .9rem;
}

.math-display-card strong {
  font-size: 1.85rem;
  font-family: Fredoka, Inter, sans-serif;
}

.math-display-card.target {
  background: linear-gradient(180deg, rgba(0,214,179,.14), rgba(106,92,255,.08));
  border-color: rgba(0,214,179,.30);
}

.math-center-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(220px, .9fr);
  gap: 16px;
}

.math-reactor-shell {
  position: relative;
  min-height: 160px;
  padding: 20px;
  border-radius: 24px;
  border: 1px solid rgba(255,255,255,.08);
  background: radial-gradient(circle at center, rgba(0,214,179,.16), rgba(106,92,255,.08) 42%, rgba(255,255,255,.02) 72%);
  overflow: hidden;
}

.math-reactor-ring {
  position: absolute;
  inset: 18px;
  border-radius: 24px;
  border: 1px solid rgba(255,255,255,.08);
  box-shadow: inset 0 0 0 1px rgba(106,92,255,.08), 0 0 40px rgba(106,92,255,.1);
}

.math-progress {
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: 20px;
  height: 18px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.08);
}

.math-progress-bar {
  width: 12%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--brand), var(--accent));
  box-shadow: 0 0 24px rgba(106,92,255,.22);
  transition: width .2s ease;
}

.math-side-panel {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 14px;
}

.math-history-wrap {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.math-ops-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.math-ops-grid--panel {
  padding: 16px;
  border-radius: 22px;
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.08);
}

.lab-feedback {
  margin: 0;
  padding: 13px 14px;
  border-radius: 16px;
  background: rgba(255,255,255,.03);
  border: 1px solid rgba(255,255,255,.08);
}

.lab-feedback.is-success {
  background: rgba(0, 214, 179, .12);
  border-color: rgba(0, 214, 179, .28);
}

.lab-feedback.is-error,
.lab-feedback.is-warn {
  background: rgba(255, 183, 3, .1);
  border-color: rgba(255, 183, 3, .28);
}

.labs-cta {
  margin-top: 24px;
}

@media (max-width: 1100px) {
  .lab-window--game,
  .math-center-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 980px) {
  .mini-labs-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .math-display-grid,
  .math-ops-grid {
    grid-template-columns: 1fr 1fr;
  }

  .lab-arrow-controls--pad {
    grid-template-columns: repeat(3, 56px);
  }

  .pad-spacer,
  .cmd-pad-core,
  .cmd-btn,
  .op-btn {
    min-width: 56px;
    min-height: 56px;
    width: 56px;
    height: 56px;
  }
}

@media (max-width: 480px) {
  .math-display-grid,
  .math-ops-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== Summer courses ===== */
.summer-section {
  background: radial-gradient(circle at top right, rgba(106,92,255,0.14), transparent 38%), radial-gradient(circle at top left, rgba(0,194,168,0.12), transparent 34%);
}
.summer-courses-grid {
  margin-top: 1.5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.2rem;
}
.summer-course-card {
  position: relative;
  overflow: hidden;
}
.summer-course-card::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}
.summer-course-card--featured {
  box-shadow: 0 18px 40px rgba(106,92,255,0.18);
  border-color: rgba(106,92,255,0.3);
}
.summer-course-header, .summer-pricing {
  display: flex;
  justify-content: space-between;
  gap: .75rem;
  align-items: start;
}
.summer-badge, .summer-chip {
  display: inline-flex;
  padding: .35rem .7rem;
  border-radius: 999px;
  background: rgba(106,92,255,0.12);
  color: var(--accent);
  font-weight: 700;
  font-size: .8rem;
}
.summer-audience {
  margin: .55rem 0 0;
  color: var(--muted);
  font-size: .95rem;
}
.summer-pricing {
  margin: 1rem 0;
}
.summer-pricing div {
  flex: 1;
  display: grid;
  gap: .25rem;
  padding: .75rem;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: rgba(255,255,255,0.02);
}
.summer-pricing span, .summer-bestfor {
  color: var(--muted);
}
.summer-pricing strong {
  font-size: 1.1rem;
}
.summer-roadmap {
  margin-top: 1rem;
  border-top: 1px solid var(--border);
  padding-top: .75rem;
}
.summer-roadmap summary {
  cursor: pointer;
  font-weight: 700;
}
.summer-roadmap ol {
  margin: .85rem 0 0 1rem;
  display: grid;
  gap: .45rem;
}
.summer-footnote {
  margin-top: 1rem;
  color: var(--muted);
}

/* ===== Mini labs ===== */
.lab-challenge-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
  margin: 1rem 0 1.1rem;
}
.lab-tab {
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
  color: inherit;
  border-radius: 999px;
  padding: .45rem .85rem;
  font: inherit;
  cursor: pointer;
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}
.lab-tab:hover, .lab-tab.is-active {
  transform: translateY(-1px);
  border-color: rgba(106,92,255,0.5);
  background: rgba(106,92,255,0.15);
}
.lab-window--3d {
  gap: 1.2rem;
  align-items: stretch;
}
.code-board {
  min-height: 320px;
  padding: 1rem;
  background: linear-gradient(180deg, rgba(11,16,26,0.96), rgba(22,27,44,0.96));
  border-radius: 24px;
  perspective: 1000px;
  transform-style: preserve-3d;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.05), 0 18px 38px rgba(0,0,0,0.28);
}
.code-board {
  display: grid;
  gap: .55rem;
}
.code-cell {
  aspect-ratio: 1;
  border-radius: 18px;
  background: linear-gradient(145deg, rgba(72,83,114,0.95), rgba(40,48,73,0.95));
  border: 1px solid rgba(255,255,255,0.06);
  display: grid;
  place-items: center;
  transform: rotateX(52deg) rotateZ(-45deg);
  box-shadow: 0 10px 0 rgba(6,10,18,0.38), 0 18px 24px rgba(0,0,0,0.16);
  position: relative;
  overflow: hidden;
}
.code-cell span { transform: rotateZ(45deg) rotateX(-52deg); font-size: 1.35rem; }
.code-cell::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.13), transparent 55%);
}
.code-cell.is-even { filter: brightness(1.06); }
.code-cell.is-block { background: linear-gradient(145deg, rgba(60,35,95,0.95), rgba(26,15,45,0.95)); }
.code-cell.is-goal { background: linear-gradient(145deg, rgba(23,124,115,0.95), rgba(13,73,68,0.95)); }
.code-cell.is-gem { background: linear-gradient(145deg, rgba(0,194,168,0.26), rgba(35,49,79,0.95)); }
.code-cell.is-portal { background: linear-gradient(145deg, rgba(106,92,255,0.35), rgba(35,49,79,0.95)); }
.code-cell.is-robot { background: linear-gradient(145deg, rgba(255,183,3,0.45), rgba(63,49,18,0.95)); }

/* Force clean square mode for mini-labs board (avoids 3D overlap rendering glitches) */
.code-board--square {
  perspective: none !important;
  transform-style: flat !important;
}

.code-board--square .code-cell {
  transform: none !important;
}

.code-board--square .code-cell span {
  transform: none !important;
}

.code-board--square .code-cell::after {
  background: transparent !important;
}

.lab-status-row {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  margin: .9rem 0;
}
.lab-pill {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  padding: .45rem .75rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
}
.math-machine--3d {
  position: relative;
  overflow: hidden;
  border-radius: 24px;
  padding: 1.15rem;
  background: radial-gradient(circle at top, rgba(106,92,255,0.18), transparent 42%), linear-gradient(180deg, rgba(13,18,30,0.96), rgba(20,25,40,0.98));
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.05), 0 18px 38px rgba(0,0,0,0.25);
}
.math-machine--3d::before,
.math-machine--3d::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  filter: blur(0.5px);
}
.math-machine--3d::before {
  width: 140px; height: 140px; right: -40px; top: -40px;
  background: radial-gradient(circle, rgba(106,92,255,0.24), transparent 70%);
}
.math-machine--3d::after {
  width: 120px; height: 120px; left: -30px; bottom: -35px;
  background: radial-gradient(circle, rgba(0,194,168,0.18), transparent 70%);
}
.math-display-grid, .math-ops-grid {
  position: relative;
  z-index: 1;
}
.math-display-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  backdrop-filter: blur(10px);
}
.math-display-card.target {
  box-shadow: 0 0 0 1px rgba(106,92,255,0.25), 0 0 26px rgba(106,92,255,0.16);
}
.math-progress {
  position: relative;
  z-index: 1;
  overflow: hidden;
  background: rgba(255,255,255,0.08);
}
.math-progress-bar {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}
.op-btn {
  min-height: 58px;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.08);
  background: linear-gradient(145deg, rgba(255,255,255,0.08), rgba(255,255,255,0.03));
  color: inherit;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 10px 16px rgba(0,0,0,0.18);
  transition: transform .18s ease, border-color .18s ease;
}
.op-btn:hover { transform: translateY(-2px); border-color: rgba(106,92,255,0.45); }
.math-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
  padding: .35rem .55rem;
  border-radius: 999px;
  background: rgba(106,92,255,0.12);
  border: 1px solid rgba(106,92,255,0.22);
}
.math-chip--empty {
  background: rgba(255,255,255,0.04);
  border-color: rgba(255,255,255,0.08);
  color: var(--muted);
}
.labs-cta {
  margin-top: 1.2rem;
}
@media (max-width: 820px) {
  .code-cell { transform: none; box-shadow: 0 8px 18px rgba(0,0,0,0.16); }
  .code-cell span { transform: none; }
}

/* Mini-labs functional UI cleanup */
.lab-window--game {
  align-items: start;
  grid-template-columns: minmax(300px, 1.05fr) minmax(290px, .95fr);
}

.code-stage-panel,
.lab-side--game,
.math-side-panel,
.math-reactor-shell {
  backdrop-filter: blur(10px);
}

.code-stage-panel {
  display: grid;
  grid-template-rows: auto auto auto;
  gap: 14px;
}

.code-board-shell {
  min-height: 0;
  padding: 14px;
}

.code-board {
  min-height: 0;
  aspect-ratio: 1 / 1;
  width: 100%;
  max-width: 420px;
  margin: 0 auto;
}

.code-stage-footer {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(110px, .8fr);
  gap: 12px;
}

.lab-mission-card,
.lab-stars-panel,
.lab-mini-stat,
.math-side-meta,
.sequence-header,
.math-reactor-core {
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,.08);
  background: rgba(255,255,255,.03);
}

.lab-mission-card {
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.lab-mission-kicker,
.lab-stars-label,
.sequence-header-note,
.math-core-hint,
.lab-mini-stat span {
  color: var(--muted);
  font-size: .9rem;
}

.lab-mission-card strong,
.math-reactor-core strong {
  font-family: Fredoka, Inter, sans-serif;
  font-size: 1.2rem;
}

.lab-mission-card p,
.math-core-hint {
  margin: 0;
}

.lab-stars-panel {
  padding: 14px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
}

.lab-stars-panel--full {
  padding: 0;
  border: 0;
  background: transparent;
}

.lab-stars-row {
  display: flex;
  gap: 6px;
  align-items: center;
  flex-wrap: wrap;
}

.lab-stars-row--center {
  justify-content: center;
}

.lab-star {
  font-size: 1.3rem;
  color: rgba(255,255,255,.26);
  text-shadow: 0 0 18px rgba(255,255,255,.12);
}

.lab-star.is-on {
  color: #ffca28;
  text-shadow: 0 0 20px rgba(255,202,40,.4);
}

.lab-brief--game {
  gap: 12px;
}

.lab-mini-stats,
.math-side-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.lab-mini-stat {
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.lab-mini-stat strong {
  font-family: Fredoka, Inter, sans-serif;
  font-size: 1.15rem;
}

.sequence-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  padding: 10px 12px;
}

.sequence-header > span:first-child {
  color: var(--text);
  font-weight: 700;
}

.command-sequence--panel {
  min-height: 104px;
  align-content: start;
}

.control-dock {
  gap: 14px;
}

.lab-arrow-controls--pad {
  padding: 18px;
}

.cmd-btn,
.op-btn {
  min-height: 64px;
}

.cmd-btn:disabled,
.op-btn:disabled {
  opacity: .55;
  cursor: not-allowed;
}

.lab-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.lab-tab small {
  color: #ffca28;
  letter-spacing: .02em;
}

.lab-tab.is-complete {
  border-color: rgba(0,214,179,.26);
}

.math-machine--game {
  gap: 14px;
}

.math-reactor-shell {
  min-height: 235px;
  display: grid;
  grid-template-rows: 1fr auto;
  gap: 16px;
}

.math-reactor-core {
  position: relative;
  z-index: 1;
  margin: auto;
  width: min(100%, 290px);
  padding: 18px;
  text-align: center;
  box-shadow: 0 18px 36px rgba(0,0,0,.18);
}

.math-reactor-core strong {
  display: block;
  margin: 6px 0 8px;
  font-size: clamp(1.2rem, 2vw, 1.8rem);
  line-height: 1.3;
  word-break: break-word;
}

.math-reactor-footer {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 10px;
}

.math-progress {
  position: relative;
  left: auto;
  right: auto;
  bottom: auto;
  margin: 0;
}

.math-side-panel {
  justify-content: space-between;
}

.math-history-wrap {
  gap: 10px;
}

.math-history {
  min-height: 86px;
  padding: 10px;
  border-radius: 18px;
  background: rgba(7,10,22,.42);
  border: 1px solid rgba(255,255,255,.06);
}

.math-ops-grid--panel {
  grid-template-columns: repeat(auto-fit, minmax(90px, 1fr));
}

.lab-feedback {
  min-height: 56px;
}

@media (max-width: 1100px) {
  .code-stage-footer,
  .math-side-meta,
  .lab-mini-stats {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .sequence-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .code-board {
    max-width: 100%;
  }
}

/* --- April 2026 mini-labs cleanup: compact playful windows --- */
.mini-labs-grid {
  align-items: start;
}

.mini-lab {
  padding: 22px;
  border-radius: 28px;
}

.lab-frame {
  position: relative;
  border-radius: 26px;
  border: 1px solid rgba(255,255,255,.08);
  background:
    radial-gradient(circle at 20% 0%, rgba(106,92,255,.16), transparent 36%),
    radial-gradient(circle at 80% 100%, rgba(0,214,179,.12), transparent 42%),
    linear-gradient(180deg, rgba(8,12,25,.98), rgba(11,16,31,.96));
  box-shadow: 0 26px 60px rgba(0,0,0,.25), inset 0 1px 0 rgba(255,255,255,.04);
  overflow: hidden;
}

.lab-shell {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 18px;
}

.lab-hud-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.lab-main-grid {
  display: grid;
  gap: 18px;
  align-items: start;
}

.code-main-grid {
  grid-template-columns: minmax(0, 1.12fr) minmax(260px, .88fr);
}

.math-main-grid {
  grid-template-columns: minmax(0, 1fr) minmax(250px, .78fr);
}

.playfield-panel,
.control-console,
.math-reactor-shell,
.math-console,
.console-card {
  border-radius: 22px;
  border: 1px solid rgba(255,255,255,.08);
  background: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  box-shadow: inset 0 1px 0 rgba(255,255,255,.04);
}

.playfield-panel,
.math-console {
  padding: 16px;
}

.playfield-topline {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 14px;
}

.lab-mission-inline {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.lab-mission-inline p {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
}

.code-board-shell--tight {
  padding: 12px;
  border-radius: 24px;
}

.code-board--square {
  width: 100%;
  aspect-ratio: 1 / 1;
  min-height: 0;
  padding: 12px;
}

.stage-bottom-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 14px;
  flex-wrap: wrap;
}

.lab-mini-stat--queue {
  min-width: 96px;
  justify-content: center;
}

.control-console {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.console-card {
  padding: 14px;
}

.sequence-card {
  min-height: 130px;
}

.command-sequence--panel {
  min-height: 72px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: flex-start;
}

.control-console .lab-feedback,
.math-console .lab-feedback {
  margin: 0;
}

.pad-card {
  display: flex;
  justify-content: center;
  align-items: center;
}

.lab-arrow-controls--pad {
  width: min(240px, 100%);
  margin: 0 auto;
}

.cmd-btn,
.cmd-pad-core {
  width: 58px;
  height: 58px;
  border-radius: 18px;
}

.cmd-btn {
  font-size: 1.35rem;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.08), 0 10px 24px rgba(0,0,0,.16);
}

.cmd-pad-core {
  display: grid;
  place-items: center;
  border: 1px solid rgba(106,92,255,.28);
  background: radial-gradient(circle, rgba(0,214,179,.18), rgba(106,92,255,.18));
  color: #dffbf5;
}

.lab-actions--console {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.math-display-grid--compact {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.math-display-card {
  min-height: 112px;
}

.math-reactor-shell--full {
  padding: 18px;
  min-height: 360px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background:
    radial-gradient(circle at 50% 42%, rgba(0,214,179,.16), transparent 25%),
    radial-gradient(circle at 50% 42%, rgba(106,92,255,.15), transparent 48%),
    linear-gradient(180deg, rgba(9,17,40,.98), rgba(12,19,39,.95));
}

.math-reactor-core {
  min-height: 190px;
  display: grid;
  place-items: center;
  text-align: center;
  gap: 10px;
  padding: 24px;
  border-radius: 28px;
  border: 1px solid rgba(255,255,255,.08);
  background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.015));
}

#mathEquationDisplay {
  font-size: clamp(1.5rem, 2vw, 2rem);
  line-height: 1.25;
  letter-spacing: .01em;
  word-break: break-word;
  max-width: 100%;
}

.math-core-hint {
  margin: 0;
  color: var(--muted);
  max-width: 34ch;
}

.math-console {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.math-history-card {
  padding: 14px;
}

.math-history {
  min-height: 72px;
}

.math-console-meta {
  display: grid;
  grid-template-columns: 1fr;
}

.math-ops-grid--panel {
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 12px;
}

.op-btn {
  min-height: 64px;
  font-size: 1.15rem;
  border-radius: 18px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.08), 0 10px 24px rgba(0,0,0,.16);
}

.lab-feedback {
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,.08);
  background: rgba(7,13,29,.64);
}

.lab-feedback.is-success {
  border-color: rgba(0,214,179,.32);
  background: rgba(0,214,179,.08);
}

.lab-feedback.is-warn {
  border-color: rgba(255,183,3,.32);
  background: rgba(255,183,3,.08);
}

.lab-feedback.is-error {
  border-color: rgba(255,94,98,.35);
  background: rgba(255,94,98,.08);
}

.code-board .code-cell span,
.math-chip,
.command-chip {
  user-select: none;
}

@media (max-width: 1080px) {
  .mini-labs-grid {
    grid-template-columns: 1fr;
  }

  .code-main-grid,
  .math-main-grid {
    grid-template-columns: 1fr;
  }

  .math-display-grid--compact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .mini-lab {
    padding: 18px;
  }

  .lab-shell {
    padding: 14px;
  }

  .math-display-grid--compact {
    grid-template-columns: 1fr 1fr;
  }

  .stage-bottom-bar {
    align-items: stretch;
  }

  .math-reactor-shell--full {
    min-height: 320px;
  }
}


/* --- April 2026 fixes: subpages + theme-aware mini labs --- */
:root {
  --lab-frame-bg: radial-gradient(circle at 18% 4%, rgba(106,92,255,.10), transparent 34%), radial-gradient(circle at 82% 100%, rgba(0,194,168,.09), transparent 42%), linear-gradient(180deg, #f7f9ff, #edf3ff);
  --lab-frame-border: rgba(58, 79, 122, 0.14);
  --lab-frame-shadow: 0 22px 48px rgba(45, 62, 103, 0.12), inset 0 1px 0 rgba(255,255,255,.65);
  --lab-panel-bg: linear-gradient(180deg, rgba(255,255,255,.92), rgba(245,248,255,.84));
  --lab-panel-border: rgba(58, 79, 122, 0.12);
  --lab-surface-bg: rgba(255,255,255,.78);
  --lab-surface-strong: rgba(246,248,255,.92);
  --lab-board-shell-bg: radial-gradient(circle at 50% 0%, rgba(0,194,168,.12), transparent 38%), linear-gradient(180deg, rgba(231,238,255,.98), rgba(220,231,255,.98));
  --lab-board-bg: linear-gradient(180deg, rgba(255,255,255,.74), rgba(241,246,255,.88)), repeating-linear-gradient(90deg, rgba(58,79,122,.06) 0, rgba(58,79,122,.06) 1px, transparent 1px, transparent calc(20% - 1px)), repeating-linear-gradient(180deg, rgba(58,79,122,.05) 0, rgba(58,79,122,.05) 1px, transparent 1px, transparent calc(20% - 1px));
  --lab-chip-bg: rgba(255,255,255,.72);
  --lab-chip-border: rgba(58,79,122,.14);
  --lab-console-bg: rgba(255,255,255,.68);
  --lab-console-strong-bg: rgba(246,248,255,.92);
  --lab-feedback-bg: rgba(255,255,255,.78);
  --lab-dot: rgba(58,79,122,.22);
  --lab-btn-bg: linear-gradient(145deg, rgba(255,255,255,.92), rgba(233,240,255,.86));
  --lab-btn-border: rgba(58,79,122,.14);
  --lab-btn-shadow: inset 0 1px 0 rgba(255,255,255,.9), 0 10px 20px rgba(45,62,103,.12);
  --lab-progress-track: rgba(58,79,122,.12);
  --lab-core-bg: linear-gradient(180deg, rgba(255,255,255,.82), rgba(240,245,255,.78));
}

[data-theme="dark"],
:root:not([data-theme="light"]) {
  --lab-frame-bg: radial-gradient(circle at 20% 0%, rgba(106,92,255,.16), transparent 36%), radial-gradient(circle at 80% 100%, rgba(0,214,179,.12), transparent 42%), linear-gradient(180deg, rgba(8,12,25,.98), rgba(11,16,31,.96));
  --lab-frame-border: rgba(255,255,255,.08);
  --lab-frame-shadow: 0 26px 60px rgba(0,0,0,.25), inset 0 1px 0 rgba(255,255,255,.04);
  --lab-panel-bg: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  --lab-panel-border: rgba(255,255,255,.08);
  --lab-surface-bg: rgba(7,10,22,.42);
  --lab-surface-strong: rgba(7,13,29,.64);
  --lab-board-shell-bg: radial-gradient(circle at 50% 0%, rgba(0,214,179,.14), transparent 38%), linear-gradient(180deg, rgba(3,11,30,.95), rgba(9,16,38,.95));
  --lab-board-bg: linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02)), repeating-linear-gradient(90deg, rgba(255,255,255,.03) 0, rgba(255,255,255,.03) 1px, transparent 1px, transparent calc(20% - 1px)), repeating-linear-gradient(180deg, rgba(255,255,255,.02) 0, rgba(255,255,255,.02) 1px, transparent 1px, transparent calc(20% - 1px));
  --lab-chip-bg: rgba(255,255,255,.04);
  --lab-chip-border: rgba(255,255,255,.10);
  --lab-console-bg: rgba(255,255,255,.03);
  --lab-console-strong-bg: rgba(7,13,29,.64);
  --lab-feedback-bg: rgba(7,13,29,.64);
  --lab-dot: rgba(255,255,255,.2);
  --lab-btn-bg: linear-gradient(145deg, rgba(255,255,255,.08), rgba(255,255,255,.03));
  --lab-btn-border: rgba(255,255,255,.08);
  --lab-btn-shadow: inset 0 1px 0 rgba(255,255,255,.08), 0 10px 24px rgba(0,0,0,.16);
  --lab-progress-track: rgba(255,255,255,.08);
  --lab-core-bg: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.015));
}

.lab-window-dots span { background: var(--lab-dot); }
.lab-frame {
  border-color: var(--lab-frame-border);
  background: var(--lab-frame-bg);
  box-shadow: var(--lab-frame-shadow);
}
.playfield-panel,
.control-console,
.math-reactor-shell,
.math-console,
.console-card,
.math-display-card,
.lab-stage-chip,
.lab-pill,
.lab-mini-stat,
.sequence-header,
.math-reactor-core,
.lab-stars-panel,
.lab-feedback,
.math-history,
.command-sequence--panel,
.math-display-card,
.math-history-card {
  border-color: var(--lab-panel-border);
}
.playfield-panel,
.control-console,
.math-reactor-shell,
.math-console,
.console-card,
.math-display-card,
.lab-stage-chip,
.lab-pill,
.lab-mini-stat,
.sequence-header,
.math-reactor-core,
.lab-stars-panel,
.math-display-card {
  background: var(--lab-panel-bg);
}
.command-sequence--panel,
.math-history,
.lab-feedback {
  background: var(--lab-surface-strong);
}
.code-board-shell {
  background: var(--lab-board-shell-bg);
  border-color: color-mix(in srgb, var(--brand) 28%, var(--lab-frame-border));
}
.code-board { background: var(--lab-board-bg); }
.cmd-btn,
.op-btn {
  background: var(--lab-btn-bg);
  border-color: var(--lab-btn-border);
  box-shadow: var(--lab-btn-shadow);
  color: var(--text);
}
.cmd-pad-core {
  background: radial-gradient(circle, color-mix(in srgb, var(--brand-2) 18%, transparent), color-mix(in srgb, var(--brand) 18%, transparent));
  color: var(--text);
}
.math-progress { background: var(--lab-progress-track); }
.math-reactor-core { background: var(--lab-core-bg); }
.math-reactor-shell--full {
  min-height: 300px;
  background: radial-gradient(circle at 50% 42%, color-mix(in srgb, var(--brand-2) 15%, transparent), transparent 25%), radial-gradient(circle at 50% 42%, color-mix(in srgb, var(--brand) 15%, transparent), transparent 48%), var(--lab-panel-bg);
}
.math-main-grid {
  grid-template-columns: minmax(0, 1.08fr) minmax(280px, .92fr);
  align-items: stretch;
}
.math-console,
.control-console { height: 100%; }
.lab-mission-inline p,
.math-core-hint,
#codeChallengeHint,
#mathChallengeHint {
  flex-grow: 0;
}
#mathEquationDisplay {
  max-width: 18ch;
  margin-inline: auto;
}
.page-links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-4);
}
.page-link-card {
  justify-content: space-between;
  min-height: 100%;
}
.page-link-card .btn { align-self: flex-start; }
.subpage-hero {
  padding-top: calc(var(--space-8) + 24px);
  padding-bottom: var(--space-6);
}
.subpage-hero .card {
  background: linear-gradient(135deg, color-mix(in srgb, var(--brand) 10%, var(--card)) 0%, color-mix(in srgb, var(--brand-2) 8%, var(--card)) 100%);
}
.page-intro-actions {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-top: var(--space-4);
}
.nav a[aria-current="page"] {
  background: rgba(106,92,255,.12);
  border-color: rgba(106,92,255,.25);
}
.summer-dates {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin: 8px 0 0;
  color: var(--muted);
  font-size: .95rem;
}
.summer-date-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--brand) 8%, var(--card));
  color: var(--text);
  font-weight: 600;
}
.summer-course-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
}
.summer-course-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--brand) 7%, var(--card));
  color: var(--text);
  font-size: .92rem;
}
@media (max-width: 1080px) {
  .math-main-grid {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 640px) {
  .page-intro-actions { flex-direction: column; }
  .page-intro-actions .btn,
  .page-link-card .btn { width: 100%; }
  .math-display-grid--compact { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .math-reactor-shell--full { min-height: 0; }
}