/* ==========================================================================
   CSS DESIGN SYSTEM: 4t ESO A Matemàtiques Aplicades (PD)
   Modern, Visual, Glassmorphism, Dark/Light Themes, Responsive
   ========================================================================== */

:root {
  /* Light Theme Palette */
  --bg-main: #f8fafc;
  --bg-surface: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: rgba(255, 255, 255, 0.95);
  --border-color: rgba(226, 232, 240, 0.8);
  --border-glow: rgba(31, 78, 121, 0.15);
  
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  
  --primary: #1f4e79;
  --primary-rgb: 31, 78, 121;
  --primary-light: #e8f0fe;
  --primary-hover: #163b5c;
  
  --accent: #2563eb;
  --accent-gradient: linear-gradient(135deg, #1f4e79 0%, #2563eb 50%, #0284c7 100%);
  --success: #16a34a;
  --success-bg: #ecfdf5;
  --warning: #d97706;
  --warning-bg: #fffbeb;
  --danger: #dc2626;
  
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 25px -5px rgba(31, 78, 121, 0.1), 0 8px 10px -6px rgba(0,0,0,0.04);
  --shadow-glow: 0 0 25px rgba(37, 99, 235, 0.15);

  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;
  --font-mono: 'Fira Code', monospace;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg-main: #0b1120;
  --bg-surface: #111827;
  --bg-card: rgba(17, 24, 39, 0.8);
  --bg-card-hover: rgba(30, 41, 59, 0.9);
  --border-color: rgba(51, 65, 85, 0.6);
  --border-glow: rgba(56, 189, 248, 0.2);
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-light: #64748b;
  
  --primary: #38bdf8;
  --primary-rgb: 56, 189, 248;
  --primary-light: rgba(56, 189, 248, 0.15);
  --primary-hover: #7dd3fc;
  
  --accent: #60a5fa;
  --accent-gradient: linear-gradient(135deg, #38bdf8 0%, #818cf8 50%, #c084fc 100%);
  --success: #34d399;
  --success-bg: rgba(52, 211, 153, 0.15);
  --warning: #fbbf24;
  --warning-bg: rgba(251, 191, 36, 0.15);
  
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.3);
  --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 30px rgba(56, 189, 248, 0.2);
}

/* Base Resets */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-main);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

/* Glassmorphism Card Style */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.glass-card:hover {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  transform: translateY(-2px);
}

/* Gradient Text */
.gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font-heading);
}

.badge-primary {
  background: var(--primary-light);
  color: var(--primary);
}

.badge-outline {
  border: 1px solid var(--border-color);
  color: var(--text-muted);
}

.badge-success {
  background: var(--success-bg);
  color: var(--success);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.4rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary);
}

.btn-outline {
  background: transparent;
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.btn-sm {
  padding: 0.45rem 0.85rem;
  font-size: 0.85rem;
}

/* ==========================================================================
   NAVBAR
   ========================================================================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.nav-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 1.15rem;
  color: var(--text-main);
}

.brand-badge {
  background: var(--accent-gradient);
  color: white;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 700;
  font-family: var(--font-heading);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav-link {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
}

.nav-link:hover, .nav-link.active {
  color: var(--primary);
  background: var(--primary-light);
}

.nav-link.highlight {
  color: var(--accent);
  font-weight: 600;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.btn-theme-toggle {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  transition: var(--transition);
}

.btn-theme-toggle:hover {
  background: var(--primary-light);
}

[data-theme="light"] .dark-icon { display: none; }
[data-theme="light"] .light-icon { display: block; }
[data-theme="dark"] .light-icon { display: none; }
[data-theme="dark"] .dark-icon { display: block; }

.btn-presentation-mode {
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid var(--border-color);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--transition);
}

.btn-presentation-mode:hover {
  background: var(--primary);
  color: #ffffff;
}

.btn-mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  width: 32px;
  height: 24px;
  flex-direction: column;
  justify-content: space-between;
}

.btn-mobile-toggle span {
  display: block;
  height: 3px;
  width: 100%;
  background: var(--text-main);
  border-radius: 3px;
  transition: var(--transition);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
  position: relative;
  padding: 4.5rem 1.5rem 4rem;
  overflow: hidden;
}

.hero-backdrop {
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 500px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.12) 0%, rgba(2, 132, 199, 0.05) 50%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero-container {
  max-width: 1240px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: 3.2rem;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 580px;
  margin-bottom: 2rem;
}

.hero-teacher-card {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.25rem;
  max-width: 480px;
  margin-bottom: 2rem;
}

.teacher-avatar {
  font-size: 2.5rem;
  background: var(--primary-light);
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
}

.teacher-role {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 600;
}

.teacher-name {
  font-size: 1.3rem;
  color: var(--text-main);
}

.teacher-email {
  font-size: 0.9rem;
  color: var(--primary);
  word-break: break-all;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Floating Card Visuals */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-card-stack {
  position: relative;
  width: 320px;
  height: 320px;
}

.float-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  width: 270px;
  animation: floatAnim 6s ease-in-out infinite;
}

.float-card .float-icon {
  font-size: 2rem;
}

.float-card strong {
  display: block;
  font-size: 0.95rem;
  color: var(--text-main);
}

.float-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin: 0;
}

.card-top {
  top: 0;
  left: 0;
  animation-delay: 0s;
}

.card-mid {
  top: 100px;
  right: 0;
  animation-delay: -2s;
}

.card-bot {
  bottom: 0;
  left: 30px;
  animation-delay: -4s;
}

@keyframes floatAnim {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ==========================================================================
   SECTIONS COMMON
   ========================================================================== */
.section {
  padding: 5rem 1.5rem;
}

.section-container {
  max-width: 1240px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3.5rem;
}

.section-badge {
  display: inline-block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 2.3rem;
  margin-bottom: 0.85rem;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
}

/* ==========================================================================
   HORARIS
   ========================================================================== */
.horaris-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.timetable-card {
  padding: 1.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.timetable-card.active-day {
  border-color: var(--accent);
  box-shadow: 0 0 20px rgba(37, 99, 235, 0.25);
  background: var(--primary-light);
}

.day-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.day-name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.15rem;
}

.day-tag {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  background: var(--primary-light);
  color: var(--primary);
}

.day-tag.tag-off {
  background: var(--border-color);
  color: var(--text-muted);
}

.day-time {
  font-size: 1.35rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--text-main);
  margin-bottom: 0.75rem;
}

.day-aula {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.timetable-live-status {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  padding: 0.85rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  max-width: 450px;
  margin: 0 auto;
  font-size: 0.9rem;
  font-weight: 500;
}

.pulse-dot {
  width: 10px;
  height: 10px;
  background: var(--success);
  border-radius: 50%;
  animation: pulseDot 1.8s infinite;
}

@keyframes pulseDot {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(22, 163, 74, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(22, 163, 74, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(22, 163, 74, 0); }
}

/* ==========================================================================
   ENFOCAMENT COMPARISON
   ========================================================================== */
.comparison-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2rem;
  align-items: stretch;
}

.comparison-card {
  padding: 2.25rem;
  position: relative;
}

.comparison-card.featured {
  border: 2px solid var(--primary);
}

.comp-badge {
  position: absolute;
  top: -12px;
  right: 25px;
  background: var(--accent-gradient);
  color: white;
  padding: 0.3rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.comp-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.comp-icon {
  font-size: 2rem;
}

.comp-header h3 {
  font-size: 1.45rem;
}

.comp-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.comp-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.98rem;
  line-height: 1.5;
}

/* ==========================================================================
   TRIMESTRES ROADMAP & TABS
   ========================================================================== */
.tab-controls {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
}

.tab-btn {
  padding: 0.75rem 1.75rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  background: var(--bg-surface);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.tab-btn .tab-num {
  color: var(--primary);
}

.tab-btn:hover {
  background: var(--primary-light);
  color: var(--text-main);
}

.tab-btn.active {
  background: var(--accent-gradient);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.tab-btn.active .tab-num {
  color: #ffffff;
}

.tab-pane {
  display: none;
  animation: fadeIn 0.4s ease;
}

.tab-pane.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.units-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.75rem;
}

.unit-card {
  padding: 1.85rem;
  display: flex;
  flex-direction: column;
}

.unit-header {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  margin-bottom: 1.25rem;
}

.unit-number {
  background: var(--primary-light);
  color: var(--primary);
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 0.95rem;
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.unit-header h4 {
  font-size: 1.2rem;
  line-height: 1.35;
}

.unit-topics {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.unit-topics li {
  position: relative;
  padding-left: 1.25rem;
  line-height: 1.45;
}

.unit-topics li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-size: 1.2rem;
  line-height: 1;
}

.transversal-card {
  border-color: var(--success);
  background: linear-gradient(180deg, var(--bg-card) 0%, var(--success-bg) 100%);
}

.transversal-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--success);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

/* ==========================================================================
   SIMULATORS / VISUAL TOOLS
   ========================================================================== */
.simulators-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.tool-card {
  padding: 1.85rem;
  display: flex;
  flex-direction: column;
}

.tool-header {
  margin-bottom: 1.25rem;
}

.tool-tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--primary);
  display: block;
  margin-bottom: 0.35rem;
}

.tool-header h3 {
  font-size: 1.25rem;
}

.input-group {
  margin-bottom: 1.25rem;
}

.input-group label {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.4rem;
}

.input-group input[type="number"], .input-group input[type="range"] {
  width: 100%;
}

.input-group input[type="number"] {
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 1rem;
}

.calc-results-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.res-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.95rem;
}

.highlight-green {
  color: var(--success);
  font-family: var(--font-mono);
  font-size: 1.15rem;
}

.highlight-blue {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 1.35rem;
}

/* Linear function canvas */
.tool-sliders-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.formula-display {
  text-align: center;
  padding: 0.5rem;
  background: var(--primary-light);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--primary);
  margin-bottom: 1rem;
}

.canvas-container {
  display: flex;
  justify-content: center;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.5rem;
}

#canvas-function {
  max-width: 100%;
  height: auto;
}

/* Dice simulator */
.tool-intro {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.dice-actions {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.dice-stats-container {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.total-rolls-badge {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.85rem;
  text-align: center;
}

.dice-bars {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.dice-bar-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  font-family: var(--font-mono);
}

.dice-bar-label {
  width: 40px;
}

.dice-bar-track {
  flex-grow: 1;
  height: 14px;
  background: var(--border-color);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.dice-bar-fill {
  height: 100%;
  background: var(--accent);
  transition: width 0.2s ease;
}

.dice-bar-pct {
  width: 45px;
  text-align: right;
  color: var(--text-muted);
}

/* ==========================================================================
   NORMES
   ========================================================================== */
.normes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.norma-card {
  padding: 1.75rem;
}

.norma-icon {
  font-size: 2.2rem;
  margin-bottom: 0.85rem;
}

.norma-card h4 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.norma-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.ordinador-rules-box {
  padding: 2rem;
  border-color: var(--warning);
}

.ordinador-rules-box h3 {
  font-size: 1.35rem;
  margin-bottom: 1.25rem;
  color: var(--warning);
}

.ordinador-rules-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.rule-col {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.rule-item {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.95rem;
  color: var(--text-main);
}

/* ==========================================================================
   AVALUACIÓ
   ========================================================================== */
.avaluacio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.75rem;
  margin-bottom: 2.5rem;
}

.avaluacio-card {
  padding: 2rem;
}

.eval-header {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 1.25rem;
}

.eval-icon {
  font-size: 2rem;
}

.eval-header h3 {
  font-size: 1.25rem;
}

.eval-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.eval-features strong {
  color: var(--text-main);
}

.eval-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.chip {
  padding: 0.4rem 0.85rem;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
}

.recovery-card {
  border-color: var(--accent);
}

.concursos-box {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 2rem 2.5rem;
}

.concursos-badge {
  font-size: 0.8rem;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.concursos-content h3 {
  font-size: 1.35rem;
  margin-bottom: 0.5rem;
}

.concursos-content p {
  color: var(--text-muted);
  font-size: 0.95rem;
  max-width: 650px;
}

.concursos-visual {
  font-size: 3rem;
}

/* ==========================================================================
   CLASSROOM SECTION
   ========================================================================== */
.classroom-card {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  padding: 3rem;
  align-items: center;
}

.classroom-badge {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 0.5rem;
}

.classroom-details h2 {
  font-size: 2rem;
  margin-bottom: 0.85rem;
}

.classroom-details p {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 1.5rem;
}

.class-info-block {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.info-row {
  display: flex;
  gap: 0.75rem;
  font-size: 0.95rem;
}

.info-label {
  font-weight: 600;
  color: var(--text-muted);
  width: 80px;
}

.info-val {
  font-weight: 600;
  color: var(--text-main);
}

.code-copy-wrapper {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.code-box {
  background: var(--bg-surface);
  border: 2px dashed var(--accent);
  border-radius: var(--radius-md);
  padding: 0.75rem 1.5rem;
  display: flex;
  flex-direction: column;
}

.code-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 700;
}

.class-code {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.05em;
}

.copy-alert {
  display: none;
  margin-top: 1rem;
  padding: 0.65rem 1rem;
  background: var(--success-bg);
  color: var(--success);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
}

.copy-alert.show {
  display: block;
  animation: fadeIn 0.3s ease;
}

.classroom-qr-side {
  display: flex;
  justify-content: center;
}

.qr-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  box-shadow: var(--shadow-md);
}

.qr-canvas-wrap {
  padding: 0.5rem;
  background: white;
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
}

.qr-caption {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  border-top: 1px solid var(--border-color);
  padding: 2.5rem 1.5rem;
  background: var(--bg-surface);
}

.footer-container {
  max-width: 1240px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ==========================================================================
   SLIDE DECK MODAL (PRESENTATION MODE)
   ========================================================================== */
.slide-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
}

.slide-modal.open {
  display: flex;
  align-items: center;
  justify-content: center;
}

.slide-deck-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
}

.slide-deck-container {
  position: relative;
  z-index: 2001;
  width: 92vw;
  max-width: 1100px;
  height: 85vh;
  max-height: 700px;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: 0 25px 50px -12px rgba(0,0,0,0.5);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.slide-deck-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.75rem;
  border-bottom: 1px solid var(--border-color);
}

.slide-deck-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
}

.slide-deck-controls {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.slide-counter {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.btn-slide-close {
  background: transparent;
  border: none;
  font-size: 1.5rem;
  color: var(--text-main);
  cursor: pointer;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
}

.btn-slide-close:hover {
  background: var(--primary-light);
}

.slide-content-stage {
  flex-grow: 1;
  padding: 3rem 4rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.slide-item {
  animation: slideFade 0.35s ease;
}

@keyframes slideFade {
  from { opacity: 0; transform: scale(0.98); }
  to { opacity: 1; transform: scale(1); }
}

.slide-item h2 {
  font-size: 2.2rem;
  margin-bottom: 1.5rem;
  color: var(--primary);
}

.slide-item p {
  font-size: 1.25rem;
  line-height: 1.6;
  margin-bottom: 1.25rem;
  color: var(--text-main);
}

.slide-item ul {
  font-size: 1.15rem;
  line-height: 1.7;
  padding-left: 2rem;
  margin-bottom: 1.5rem;
}

.slide-deck-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  border-top: 1px solid var(--border-color);
}

.slide-dots {
  display: flex;
  gap: 0.5rem;
}

.slide-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-color);
  cursor: pointer;
  transition: var(--transition);
}

.slide-dot.active {
  background: var(--primary);
  transform: scale(1.3);
}

/* ==========================================================================
   RESPONSIVE DESIGN
   ========================================================================== */
@media (max-width: 992px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2.5rem;
  }
  
  .hero-subtitle, .hero-teacher-card {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-pills, .hero-cta-group {
    justify-content: center;
  }
  
  .comparison-grid {
    grid-template-columns: 1fr;
  }
  
  .classroom-card {
    grid-template-columns: 1fr;
    padding: 2rem;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--bg-surface);
    flex-direction: column;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
  }
  
  .nav-menu.open {
    display: flex;
  }
  
  .btn-mobile-toggle {
    display: flex;
  }
  
  .hero-title {
    font-size: 2.3rem;
  }
  
  .section-title {
    font-size: 1.85rem;
  }
  
  .ordinador-rules-columns {
    grid-template-columns: 1fr;
  }
  
  .slide-content-stage {
    padding: 1.5rem;
  }
}