/* CSS Design System for Morningness-Eveningness Questionnaire (MEQ) */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&family=Plus+Jakarta+Sans:wght@300;400;500;600;700&display=swap');

:root {
  /* HSL Color Tokens - Dark Mode Core (Default) */
  --bg-base-h: 228;
  --bg-base-s: 33%;
  --bg-base-l: 8%;
  
  --bg-gradient: linear-gradient(135deg, hsl(228, 33%, 8%), hsl(255, 36%, 11%));
  --card-bg: hsla(228, 30%, 13%, 0.6);
  --card-border: hsla(228, 20%, 25%, 0.25);
  --card-shadow: 0 16px 36px -8px rgba(0, 0, 0, 0.5), 0 0 1px 1px hsla(0, 0%, 100%, 0.05) inset;
  
  --text-primary: hsl(228, 20%, 96%);
  --text-secondary: hsl(228, 12%, 75%);
  --text-muted: hsl(228, 10%, 55%);
  
  /* Chronotype Theme Accents */
  --accent-morning: hsl(18, 96%, 60%);    /* Solar Amber / Sunrise */
  --accent-morning-rgb: 244, 107, 63;
  --accent-evening: hsl(265, 88%, 68%);   /* Twilight Violet / Deep Night */
  --accent-evening-rgb: 167, 102, 255;
  --accent-bear: hsl(160, 84%, 48%);      /* Emerald Teal / Solar Peak */
  --accent-bear-rgb: 20, 224, 152;
  
  --brand-primary-h: 352;
  --brand-primary-s: 85%;
  --brand-primary-l: 45%;

  --brand-primary: hsl(var(--brand-primary-h), var(--brand-primary-s), var(--brand-primary-l));
  --brand-primary-rgb: 200, 16, 46;
  --brand-secondary: hsl(var(--brand-primary-h), 80%, 35%);
  --brand-hover: hsl(var(--brand-primary-h), 90%, 54%);
  --brand-glow: rgba(var(--brand-primary-rgb), 0.25);
  
  --success: hsl(142, 72%, 45%);
  --danger: hsl(350, 84%, 60%);
  
  /* Structural Tokens */
  --border-radius-lg: 24px;
  --border-radius-md: 16px;
  --border-radius-sm: 8px;
  --transition-bezier: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.2s ease;
  --max-width: 1100px;
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-base-h: 220;
  --bg-base-s: 20%;
  --bg-base-l: 96%;
  
  --bg-gradient: linear-gradient(135deg, hsl(220, 20%, 96%), hsl(220, 20%, 92%));
  --card-bg: hsla(220, 20%, 100%, 0.8);
  --card-border: hsla(220, 15%, 80%, 0.4);
  --card-shadow: 0 16px 36px -12px rgba(100, 110, 140, 0.15), 0 0 1px 1px hsla(0, 0%, 100%, 0.9) inset;
  
  --text-primary: hsl(220, 30%, 15%);
  --text-secondary: hsl(220, 15%, 40%);
  --text-muted: hsl(220, 10%, 60%);
  
  --brand-glow: rgba(var(--brand-primary-rgb), 0.12);
  --card-shadow-inset: hsla(0, 0%, 100%, 0.6) inset;
}

/* Global Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-family: 'Plus Jakarta Sans', sans-serif;
  color: var(--text-primary);
  background-color: hsl(var(--bg-base-h), var(--bg-base-s), var(--bg-base-l));
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  background: var(--bg-gradient);
  background-attachment: fixed;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

p {
  line-height: 1.6;
  color: var(--text-secondary);
}

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

a:hover {
  color: var(--brand-hover);
}

/* Base Layout Wrapper */
.app-container {
  flex: 1;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

/* Premium Navigation Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  border-bottom: 1px solid var(--card-border);
}

.logo-wrapper {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  cursor: pointer;
  text-decoration: none;
}

.company-logo {
  width: 280px;
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--border-radius-sm);
  background-color: #ffffff;
  padding: 8px 14px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  transition: var(--transition-bezier);
}

@media (max-width: 480px) {
  .company-logo {
    width: 200px;
    padding: 6px 10px;
  }
}

.logo-wrapper:hover .company-logo {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
}

.theme-toggle-btn {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  width: 42px;
  height: 42px;
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  box-shadow: var(--card-shadow);
  transition: var(--transition-bezier);
}

.theme-toggle-btn:hover {
  transform: translateY(-2px);
  border-color: var(--brand-primary);
  box-shadow: 0 0 12px var(--brand-glow);
}

.theme-toggle-btn svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.theme-toggle-btn:hover svg {
  transform: rotate(30deg);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.lang-toggle-btn {
  font-family: 'Outfit', sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-secondary);
  background: var(--card-bg);
  padding: 0.5rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--card-border);
  cursor: pointer;
  box-shadow: var(--card-shadow);
  transition: var(--transition-bezier);
}

.lang-toggle-btn:hover {
  color: var(--brand-primary);
  border-color: var(--brand-primary);
  transform: translateY(-2px);
  box-shadow: 0 0 12px var(--brand-glow);
}

/* Glassmorphic Base Cards */
.glass-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--card-shadow);
  padding: 2.5rem;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: var(--transition-bezier);
  position: relative;
  overflow: hidden;
}

/* Hero Screen styling */
.hero-section {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
  min-height: calc(80vh - 120px);
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: hsla(var(--brand-primary-h), var(--brand-primary-s), var(--brand-primary-l), 0.1);
  border: 1px solid hsla(var(--brand-primary-h), var(--brand-primary-s), var(--brand-primary-l), 0.2);
  color: var(--brand-primary);
  font-family: 'Outfit', sans-serif;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.4rem 1rem;
  border-radius: 100px;
  align-self: flex-start;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.hero-title {
  font-size: 3.2rem;
  line-height: 1.08;
  background: linear-gradient(135deg, var(--text-primary) 30%, var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-title span {
  background: linear-gradient(135deg, var(--accent-morning) 20%, var(--brand-secondary) 50%, var(--accent-evening));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: block;
}

.hero-description {
  font-size: 1.15rem;
  max-width: 540px;
}

.btn-group {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.primary-btn {
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
  color: hsl(228, 33%, 8%);
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  font-size: 1.05rem;
  padding: 1rem 2.2rem;
  border: none;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  box-shadow: 0 8px 24px var(--brand-glow);
  transition: var(--transition-bezier);
  position: relative;
  overflow: hidden;
}

.primary-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -50%;
  width: 200%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  transform: skewX(-20deg);
  transition: 0.75s ease;
}

.primary-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(var(--brand-primary-rgb), 0.4);
}

.primary-btn:hover::before {
  left: 100%;
}

.secondary-btn {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  font-size: 1.05rem;
  padding: 1rem 2.2rem;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  box-shadow: var(--card-shadow);
  transition: var(--transition-bezier);
}

.secondary-btn:hover {
  transform: translateY(-3px);
  border-color: var(--text-secondary);
}

/* Hero Decorative Clock Canvas Art */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.visual-clock-ring {
  width: 320px;
  height: 320px;
  border-radius: 50%;
  border: 2px dashed var(--card-border);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  animation: rotateClock 120s linear infinite;
}

.visual-clock-glowing-dots {
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, transparent 50%, var(--brand-glow) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.clock-center-art {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: var(--card-shadow);
  position: relative;
  z-index: 5;
  animation: floatClock 6s ease-in-out infinite;
}

.clock-center-art svg {
  width: 60px;
  height: 60px;
  filter: drop-shadow(0 0 8px rgba(244, 107, 63, 0.4));
}

.clock-time-indicator {
  font-family: 'Outfit', sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 0.5rem;
  letter-spacing: 0.05em;
  color: var(--accent-morning);
}

.clock-badge {
  background: hsla(265, 88%, 68%, 0.15);
  border: 1px solid hsla(265, 88%, 68%, 0.25);
  color: var(--accent-evening);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 100px;
  margin-top: 0.25rem;
  text-transform: uppercase;
}

/* Quiz Screen styling */
.quiz-section {
  max-width: 720px;
  margin: 0 auto;
  width: 100%;
}

.quiz-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.quiz-steps-counter {
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--brand-primary);
}

.quiz-steps-counter span {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 400;
}

.progress-bar-bg {
  flex: 1;
  height: 6px;
  background: hsla(0, 0%, 100%, 0.06);
  border-radius: 100px;
  margin: 0 1.5rem;
  overflow: hidden;
  position: relative;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--brand-primary), var(--brand-secondary));
  border-radius: 100px;
  transition: width 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 0 10px rgba(var(--brand-primary-rgb), 0.5);
}

.quit-quiz-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition-fast);
}

.quit-quiz-btn:hover {
  color: var(--danger);
}

/* Quiz Card Animations */
.question-container {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.question-text {
  font-size: 1.6rem;
  font-weight: 600;
  line-height: 1.35;
}

.options-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.option-item {
  background: hsla(var(--bg-base-h), var(--bg-base-s), 20%, 0.15);
  border: 1px solid var(--card-border);
  padding: 1.25rem 1.75rem;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: var(--transition-bezier);
}

.option-item:hover {
  background: hsla(var(--bg-base-h), var(--bg-base-s), 20%, 0.35);
  border-color: hsla(var(--bg-base-h), var(--bg-base-s), 60%, 0.3);
  transform: translateX(4px);
}

.option-item.selected {
  background: hsla(var(--brand-primary-h), var(--brand-primary-s), var(--brand-primary-l), 0.08);
  border-color: var(--brand-primary);
  box-shadow: 0 0 16px var(--brand-glow), 0 0 1px 1px var(--brand-primary) inset;
}

.option-label {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-primary);
  flex: 1;
  padding-right: 1.5rem;
}

.option-check {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid var(--card-border);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
  background: transparent;
  flex-shrink: 0;
}

.option-item:hover .option-check {
  border-color: var(--text-secondary);
}

.option-item.selected .option-check {
  border-color: var(--brand-primary);
  background: var(--brand-primary);
}

.option-check svg {
  width: 12px;
  height: 12px;
  fill: none;
  stroke: hsl(228, 33%, 8%);
  stroke-width: 3.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0;
  transform: scale(0.6);
  transition: var(--transition-fast);
}

.option-item.selected .option-check svg {
  opacity: 1;
  transform: scale(1);
}

.quiz-footer {
  display: flex;
  justify-content: space-between;
  margin-top: 2rem;
  align-items: center;
}

/* Dashboard / Results styling */
.dashboard-section {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  opacity: 1;
  animation: fadeIn 0.8s var(--transition-bezier);
}

.results-header-card {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: center;
}

.chronotype-result-info {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.results-badge {
  background: hsla(244, 100%, 50%, 0.1);
  border: 1px solid hsla(244, 100%, 50%, 0.2);
  align-self: flex-start;
}

.chronotype-title {
  font-size: 2.8rem;
  background: linear-gradient(135deg, var(--text-primary), var(--text-muted));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.chronotype-title span {
  display: inline-block;
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.chronotype-score-card {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-family: 'Outfit', sans-serif;
  margin-top: 0.25rem;
}

.chronotype-score-value {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
  background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.chronotype-score-max {
  font-size: 1.2rem;
  color: var(--text-muted);
}

.chronotype-description {
  font-size: 1.05rem;
  line-height: 1.65;
}

.chronotype-visual-illustration {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Beautiful dynamic chronotype illustrations */
.illustration-card {
  width: 240px;
  height: 240px;
  border-radius: 36px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  box-shadow: var(--card-shadow);
  border: 1px solid var(--card-border);
}

.illustration-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, rgba(var(--accent-rgb), 0.25) 0%, transparent 70%);
  z-index: 1;
}

.illustration-icon-wrapper {
  z-index: 2;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.illustration-card svg {
  width: 100px;
  height: 100px;
  filter: drop-shadow(0 0 15px rgba(var(--accent-rgb), 0.5));
}

.illustration-label {
  font-family: 'Outfit', sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent-color);
}

/* Dashboard Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
}

/* Interactive Sleep Timeline */
.sleep-schedule-card {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.schedule-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-title-icon {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.card-title-icon svg {
  width: 24px;
  height: 24px;
  color: var(--brand-primary);
}

.card-title-icon h3 {
  font-size: 1.4rem;
  font-weight: 600;
}

.schedule-time-blocks {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.time-block {
  background: hsla(var(--bg-base-h), var(--bg-base-s), 20%, 0.12);
  border: 1px solid var(--card-border);
  padding: 1.25rem;
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  gap: 1.25rem;
  transition: var(--transition-fast);
}

.time-block:hover {
  background: hsla(var(--bg-base-h), var(--bg-base-s), 20%, 0.2);
  border-color: var(--brand-primary);
}

.time-block-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.time-block.sleep .time-block-icon {
  background: hsla(265, 88%, 68%, 0.15);
  color: var(--accent-evening);
}

.time-block.wake .time-block-icon {
  background: hsla(18, 96%, 60%, 0.15);
  color: var(--accent-morning);
}

.time-block-icon svg {
  width: 24px;
  height: 24px;
}

.time-block-info {
  display: flex;
  flex-direction: column;
}

.time-block-label {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.time-block-value {
  font-family: 'Outfit', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  margin-top: 0.1rem;
}

/* Circadian Rhythm Graph */
.circadian-visualizer-container {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  height: 100%;
}

.visualizer-chart-wrapper {
  flex: 1;
  background: hsla(var(--bg-base-h), var(--bg-base-s), 20%, 0.1);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-md);
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  min-height: 260px;
}

.visualizer-chart-wrapper svg {
  width: 100%;
  height: 100%;
}

.chart-marker-now {
  stroke-dasharray: 4;
}

/* Cognitive Performance Windows styling */
.performance-timings-card {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.recommendations-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.recommendation-item {
  border-left: 3px solid var(--accent-color);
  padding-left: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.recommendation-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.recommendation-title {
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text-primary);
}

.recommendation-time {
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  background: hsla(var(--bg-base-h), var(--bg-base-s), 20%, 0.25);
  padding: 0.25rem 0.75rem;
  border-radius: 100px;
  color: var(--accent-color);
}

.recommendation-desc {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

/* History Log Section */
.history-section {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.history-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.clear-history-btn {
  background: transparent;
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  font-family: 'Outfit', sans-serif;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 10px;
  cursor: pointer;
  transition: var(--transition-fast);
}

.clear-history-btn:hover {
  background: hsla(350, 84%, 60%, 0.1);
  color: var(--danger);
  border-color: hsla(350, 84%, 60%, 0.2);
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-height: 350px;
  overflow-y: auto;
  padding-right: 0.5rem;
}

/* Custom Scrollbar for list container */
.history-list::-webkit-scrollbar {
  width: 6px;
}
.history-list::-webkit-scrollbar-track {
  background: transparent;
}
.history-list::-webkit-scrollbar-thumb {
  background: var(--card-border);
  border-radius: 10px;
}
.history-list::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

.history-item {
  background: hsla(var(--bg-base-h), var(--bg-base-s), 20%, 0.1);
  border: 1px solid var(--card-border);
  padding: 1.25rem;
  border-radius: var(--border-radius-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition-fast);
}

.history-item:hover {
  background: hsla(var(--bg-base-h), var(--bg-base-s), 20%, 0.18);
  border-color: var(--brand-primary);
  transform: translateY(-2px);
}

.history-meta {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.history-date {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.history-chronotype {
  font-family: 'Outfit', sans-serif;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--accent-color);
}

.history-score-display {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.25rem;
}

.history-score {
  font-family: 'Outfit', sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
}

.history-score span {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 400;
}

.empty-history-state {
  text-align: center;
  padding: 3rem 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.empty-history-state svg {
  width: 48px;
  height: 48px;
  color: var(--text-muted);
}

.empty-history-state p {
  font-size: 1rem;
  color: var(--text-muted);
}

/* Resources & Educational Grid */
.educational-section {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.educational-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.educational-card {
  background: hsla(var(--bg-base-h), var(--bg-base-s), 20%, 0.1);
  border: 1px solid var(--card-border);
  padding: 2rem;
  border-radius: var(--border-radius-md);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: var(--transition-bezier);
}

.educational-card:hover {
  transform: translateY(-4px);
  border-color: var(--brand-primary);
  background: hsla(var(--bg-base-h), var(--bg-base-s), 20%, 0.18);
}

.educational-icon {
  width: 48px;
  height: 48px;
  background: hsla(var(--bg-base-h), var(--bg-base-s), 20%, 0.3);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-primary);
}

.educational-icon svg {
  width: 24px;
  height: 24px;
}

.educational-title {
  font-size: 1.25rem;
  font-weight: 600;
}

.educational-card p {
  font-size: 0.95rem;
  line-height: 1.55;
}

/* Footer Section */
.app-footer {
  text-align: center;
  padding: 3rem 0;
  border-top: 1px solid var(--card-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-links a:hover {
  color: var(--brand-primary);
}

.footer-copyright {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-citation {
  font-size: 0.76rem;
  color: var(--text-muted);
  max-width: 700px;
  line-height: 1.5;
  margin-top: 0.25rem;
  opacity: 0.8;
}

/* CSS Utilities and Display Toggles */
.hidden {
  display: none !important;
}

/* Transition Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes rotateClock {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes floatClock {
  0% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
  100% {
    transform: translateY(0);
  }
}

/* Responsive Viewport Adjustments */
@media (max-width: 960px) {
  .hero-section {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 3rem;
    padding-top: 2rem;
  }
  
  .hero-content {
    align-items: center;
  }
  
  .badge {
    align-self: center;
  }
  
  .hero-title {
    font-size: 2.8rem;
  }
  
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
  
  .results-header-card {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2rem;
  }
  
  .chronotype-result-info {
    align-items: center;
  }
  
  .results-badge {
    align-self: center;
  }
}

@media (max-width: 600px) {
  .app-container {
    padding: 1rem;
    gap: 1.5rem;
  }
  
  .glass-card {
    padding: 1.5rem;
  }
  
  .hero-title {
    font-size: 2.2rem;
  }
  
  .hero-description {
    font-size: 1rem;
  }
  
  .btn-group {
    flex-direction: column;
    width: 100%;
  }
  
  .primary-btn, .secondary-btn {
    width: 100%;
    justify-content: center;
  }
  
  .question-text {
    font-size: 1.3rem;
  }
  
  .option-item {
    padding: 1rem;
  }
  
  .option-label {
    font-size: 0.95rem;
  }
  
  .chronotype-title {
    font-size: 2rem;
  }
  
  .chronotype-score-value {
    font-size: 2.4rem;
  }
  
  .schedule-time-blocks {
    grid-template-columns: 1fr;
  }
}

/* Printing Optimizations */
@media print {
  body {
    background: white !important;
    color: black !important;
  }
  .app-header, .theme-toggle-btn, .btn-group, .quiz-footer, .clear-history-btn, .quit-quiz-btn, .app-footer, .history-section, .educational-section {
    display: none !important;
  }
  .glass-card {
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important;
  }
  .dashboard-grid {
    grid-template-columns: 1fr !important;
  }
}