/**
 * LinePilot Website Styles
 * Material Design 3 - Matching Extension UI/UX
 */

/* ===== CSS Variables (Material Design 3) ===== */
:root {
  /* Colors - Primary */
  --md-sys-color-primary: #6750A4;
  --md-sys-color-on-primary: #FFFFFF;
  --md-sys-color-primary-container: #EADDFF;
  --md-sys-color-on-primary-container: #21005D;
  
  /* Colors - Secondary */
  --md-sys-color-secondary: #625B71;
  --md-sys-color-on-secondary: #FFFFFF;
  --md-sys-color-secondary-container: #E8DEF8;
  --md-sys-color-on-secondary-container: #1D192B;
  
  /* Colors - Surface */
  --md-sys-color-surface: #FFFBFE;
  --md-sys-color-surface-dim: #DED8E1;
  --md-sys-color-surface-bright: #FFFBFE;
  --md-sys-color-surface-container-lowest: #FFFFFF;
  --md-sys-color-surface-container-low: #F7F2FA;
  --md-sys-color-surface-container: #F3EDF7;
  --md-sys-color-surface-container-high: #ECE6F0;
  --md-sys-color-surface-container-highest: #E6E0E9;
  --md-sys-color-on-surface: #1C1B1F;
  --md-sys-color-on-surface-variant: #49454F;
  
  /* Colors - Outline */
  --md-sys-color-outline: #79747E;
  --md-sys-color-outline-variant: #CAC4D0;
  
  /* Colors - Error */
  --md-sys-color-error: #B3261E;
  --md-sys-color-on-error: #FFFFFF;
  --md-sys-color-error-container: #F9DEDC;
  
  /* Typography Scale */
  --md-sys-typescale-display-large: 57px;
  --md-sys-typescale-display-medium: 45px;
  --md-sys-typescale-display-small: 36px;
  --md-sys-typescale-headline-large: 32px;
  --md-sys-typescale-headline-medium: 28px;
  --md-sys-typescale-headline-small: 24px;
  --md-sys-typescale-title-large: 22px;
  --md-sys-typescale-title-medium: 16px;
  --md-sys-typescale-title-small: 14px;
  --md-sys-typescale-body-large: 16px;
  --md-sys-typescale-body-medium: 14px;
  --md-sys-typescale-body-small: 12px;
  --md-sys-typescale-label-large: 14px;
  
  /* Shape */
  --md-sys-shape-corner-none: 0px;
  --md-sys-shape-corner-extra-small: 4px;
  --md-sys-shape-corner-small: 8px;
  --md-sys-shape-corner-medium: 12px;
  --md-sys-shape-corner-large: 16px;
  --md-sys-shape-corner-extra-large: 28px;
  --md-sys-shape-corner-full: 9999px;
  
  /* Elevation */
  --md-sys-elevation-level0: none;
  --md-sys-elevation-level1: 0px 1px 2px 0px rgba(0, 0, 0, 0.3), 0px 1px 3px 1px rgba(0, 0, 0, 0.15);
  --md-sys-elevation-level2: 0px 1px 2px 0px rgba(0, 0, 0, 0.3), 0px 2px 6px 2px rgba(0, 0, 0, 0.15);
  --md-sys-elevation-level3: 0px 4px 8px 3px rgba(0, 0, 0, 0.15), 0px 1px 3px 0px rgba(0, 0, 0, 0.3);
  --md-sys-elevation-level4: 0px 6px 10px 4px rgba(0, 0, 0, 0.15), 0px 2px 3px 0px rgba(0, 0, 0, 0.3);
  --md-sys-elevation-level5: 0px 8px 12px 6px rgba(0, 0, 0, 0.15), 0px 4px 4px 0px rgba(0, 0, 0, 0.3);
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;
  
  /* Animation */
  --md-sys-motion-easing-standard: cubic-bezier(0.2, 0, 0, 1);
  --md-sys-motion-easing-emphasized: cubic-bezier(0.2, 0, 0, 1);
  --md-sys-motion-duration-short: 200ms;
  --md-sys-motion-duration-medium: 300ms;
  --md-sys-motion-duration-long: 400ms;
}

/* ===== Sticky Footer Layout ===== */
html, body {
  height: 100%;
}

body {
  color-scheme: light; /* Force Light Mode Only */
  display: flex;
  flex-direction: column;
}

.navbar {
  flex-shrink: 0;
}

main, .hero, .page-header {
  flex-shrink: 0;
}

section {
  padding-top: var(--spacing-3xl);
  padding-bottom: var(--spacing-3xl);
}

section:last-of-type {
  padding-bottom: var(--spacing-3xl);
  margin-bottom: var(--spacing-3xl);
}

.footer {
  flex-shrink: 0;
  margin-top: auto;
}

/* ===== Reset & Base Styles ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: var(--md-sys-typescale-body-medium);
  line-height: 1.6;
  color: var(--md-sys-color-on-surface);
  background-color: var(--md-sys-color-surface);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 500;
  line-height: 1.2;
  color: var(--md-sys-color-on-surface);
}

h1 { font-size: var(--md-sys-typescale-headline-large); }
h2 { font-size: var(--md-sys-typescale-headline-medium); }
h3 { font-size: var(--md-sys-typescale-headline-small); }
h4 { font-size: var(--md-sys-typescale-title-large); }
h5 { font-size: var(--md-sys-typescale-title-medium); }
h6 { font-size: var(--md-sys-typescale-title-small); }

p {
  margin-bottom: var(--spacing-md);
}

a {
  color: var(--md-sys-color-primary);
  text-decoration: none;
  transition: color var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
}

a:hover {
  color: var(--md-sys-color-on-primary-container);
  text-decoration: underline;
}

ul, ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

/* ===== Layout ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-md);
  }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 10px 24px;
  font-size: var(--md-sys-typescale-label-large);
  font-weight: 500;
  border: none;
  border-radius: var(--md-sys-shape-corner-full);
  cursor: pointer;
  transition: all var(--md-sys-motion-duration-short) var(--md-sys-motion-easing-standard);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  box-shadow: var(--md-sys-elevation-level2);
}

.btn-primary:hover {
  background-color: var(--md-sys-color-on-primary-container);
  box-shadow: var(--md-sys-elevation-level3);
  text-decoration: none;
}

.btn-primary:active {
  box-shadow: var(--md-sys-elevation-level1);
}

.btn-outlined {
  background-color: transparent;
  color: var(--md-sys-color-primary);
  border: 1px solid var(--md-sys-color-outline);
}

.btn-outlined:hover {
  background-color: var(--md-sys-color-surface-container-high);
  border-color: var(--md-sys-color-primary);
  text-decoration: none;
}

.btn-text {
  background-color: transparent;
  color: var(--md-sys-color-primary);
  padding: 10px 16px;
}

.btn-text:hover {
  background-color: var(--md-sys-color-surface-container-highest);
  text-decoration: none;
}

.btn-large {
  padding: 16px 32px;
  font-size: var(--md-sys-typescale-title-medium);
}

.btn .material-symbols-outlined {
  font-size: 20px;
}

/* ===== Navigation ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 251, 254, 0.95);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  backdrop-filter: blur(10px);
}

.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) 0;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  color: inherit;
  cursor: pointer;
}

a.nav-brand:hover{
  text-decoration: none;
}

.brand-icon {
  width: 32px;
  height: 32px;
  display: block;
  object-fit: contain;
  flex-shrink: 0;
}

.brand-name {
  font-size: var(--md-sys-typescale-title-large);
  font-weight: 500;
  color: var(--md-sys-color-on-surface);
}

.nav-menu {
  display: flex;
  gap: var(--spacing-md);
  list-style: none;
  margin: 0;
}

.nav-link {
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--md-sys-color-on-surface-variant);
  font-weight: 500;
  border-radius: var(--md-sys-shape-corner-small);
  transition: all var(--md-sys-motion-duration-short);
}

.nav-link:hover {
  background-color: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface);
  text-decoration: none;
}

.nav-link.active {
  color: var(--md-sys-color-primary);
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
}

/* ===== Page Header (for blog, etc) ===== */
.page-header {
  padding: 80px 0 60px;
  background: var(--md-sys-color-surface-container-lowest);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.page-header-content {
  max-width: 800px;
  margin: 0 auto;
}

.page-header-content.center {
  text-align: center;
}

.page-title {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--md-sys-color-on-surface);
}

.page-description {
  font-size: var(--md-sys-typescale-body-large);
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.6;
}

/* ===== Article Styles (for blog posts) ===== */
.article-header-layout {
  text-align: center;
  margin-top: 24px;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 24px;
  font-size: 14px;
  color: var(--md-sys-color-on-surface-variant);
  flex-wrap: wrap;
}

.article-tag {
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  padding: 6px 16px;
  border-radius: 16px;
  font-weight: 600;
}

.article-title {
  font-size: 48px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 24px;
  color: var(--md-sys-color-on-surface);
}

.article-subtitle {
  font-size: 20px;
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.6;
  max-width: 700px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--md-sys-color-primary);
  text-decoration: none;
  font-weight: 600;
  margin-bottom: 32px;
  transition: gap 0.2s;
}

.back-link:hover {
  gap: 4px;
}

@media (max-width: 768px) {
  .page-header {
    padding: 60px 0 40px;
  }

  .page-title {
    font-size: 32px;
  }

  .article-title {
    font-size: 28px;
  }

  .article-subtitle {
    font-size: 18px;
  }

  .article-meta {
    font-size: 13px;
  }

  .back-link {
    margin-bottom: 24px;
  }
}

/* ===== Hero Section ===== */
.hero {
  padding: var(--spacing-3xl) 0;
  background: linear-gradient(135deg, var(--md-sys-color-surface) 0%, var(--md-sys-color-surface-container-low) 100%);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

@media (max-width: 968px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }
  
  .hero-visual {
    order: -1;
  }
}

.badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
  border-radius: var(--md-sys-shape-corner-full);
  font-size: var(--md-sys-typescale-label-large);
  font-weight: 500;
  margin-bottom: var(--spacing-md);
}

.hero-title {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 500;
  line-height: 1.1;
  margin-bottom: var(--spacing-lg);
  color: var(--md-sys-color-on-surface);
}

.hero-description {
  font-size: var(--md-sys-typescale-body-large);
  color: var(--md-sys-color-on-surface-variant);
  margin-bottom: var(--spacing-xl);
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-2xl);
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: var(--spacing-2xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--md-sys-color-outline-variant);
}

.stat-item {
  text-align: center;
}

.stat-value {
  font-size: var(--md-sys-typescale-headline-medium);
  font-weight: 700;
  color: var(--md-sys-color-primary);
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: var(--md-sys-typescale-body-small);
  color: var(--md-sys-color-on-surface-variant);
}

/* Extension Preview Card */
.extension-preview {
  perspective: 1000px;
}

.preview-card {
  background-color: var(--md-sys-color-surface-container);
  border-radius: var(--md-sys-shape-corner-extra-large);
  padding: var(--spacing-lg);
  box-shadow: var(--md-sys-elevation-level3);
  transition: transform var(--md-sys-motion-duration-medium) var(--md-sys-motion-easing-emphasized);
}

.preview-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--md-sys-elevation-level4);
}

.preview-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
}

.preview-status {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--md-sys-color-outline);
}

.status-dot.status-playing {
  background-color: #00C853;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.status-text {
  font-size: var(--md-sys-typescale-body-medium);
  font-weight: 500;
  color: var(--md-sys-color-on-surface);
}

.preview-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.speed-control label,
.color-selector label {
  display: block;
  font-size: var(--md-sys-typescale-label-large);
  font-weight: 500;
  color: var(--md-sys-color-on-surface);
  margin-bottom: var(--spacing-sm);
}

.speed-value {
  font-size: var(--md-sys-typescale-headline-small);
  font-weight: 500;
  color: var(--md-sys-color-primary);
  margin-bottom: var(--spacing-sm);
}

.slider-track {
  height: 4px;
  background-color: var(--md-sys-color-surface-container-highest);
  border-radius: var(--md-sys-shape-corner-full);
  position: relative;
  overflow: hidden;
}

.slider-fill {
  height: 100%;
  width: 60%;
  background-color: var(--md-sys-color-primary);
  border-radius: var(--md-sys-shape-corner-full);
}

.color-options {
  display: flex;
  gap: var(--spacing-sm);
}

.color-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--md-sys-shape-corner-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--md-sys-motion-duration-short);
}

.color-btn:hover {
  transform: scale(1.1);
}

.color-btn.active {
  border-color: var(--md-sys-color-on-surface);
  box-shadow: 0 0 0 2px var(--md-sys-color-surface);
}

/* ===== Features Section ===== */
.features {
  padding: var(--spacing-3xl) 0;
  background-color: var(--md-sys-color-surface-container-lowest);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  font-size: var(--md-sys-typescale-headline-large);
  margin-bottom: var(--spacing-md);
}

.section-description {
  font-size: var(--md-sys-typescale-body-large);
  color: var(--md-sys-color-on-surface-variant);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.feature-card {
  background-color: var(--md-sys-color-surface-container);
  padding: var(--spacing-xl);
  border-radius: var(--md-sys-shape-corner-large);
  transition: all var(--md-sys-motion-duration-medium) var(--md-sys-motion-easing-standard);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--md-sys-elevation-level2);
}

.feature-icon {
  width: 56px;
  height: 56px;
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  border-radius: var(--md-sys-shape-corner-medium);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
}

.feature-icon .material-symbols-outlined {
  font-size: 32px;
}

.feature-title {
  font-size: var(--md-sys-typescale-title-large);
  margin-bottom: var(--spacing-sm);
}

.feature-description {
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.6;
}

/* ===== How It Works Section ===== */
.how-it-works {
  padding: var(--spacing-3xl) 0;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--spacing-xl);
}

.step-card {
  text-align: center;
  padding: var(--spacing-lg);
}

.step-number {
  width: 56px;
  height: 56px;
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--md-sys-typescale-headline-small);
  font-weight: 700;
  margin: 0 auto var(--spacing-md);
}

.step-title {
  font-size: var(--md-sys-typescale-title-large);
  margin-bottom: var(--spacing-sm);
}

.step-description {
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.6;
}

/* ===== CTA Section ===== */
.cta {
  padding: var(--spacing-3xl) 0;
  background: linear-gradient(135deg, var(--md-sys-color-primary-container) 0%, var(--md-sys-color-secondary-container) 100%);
  text-align: center;
}

.cta-content {
  max-width: 700px;
  margin: 0 auto;
}

.cta-title {
  font-size: var(--md-sys-typescale-headline-large);
  margin-bottom: var(--spacing-md);
  color: var(--md-sys-color-on-primary-container);
}

.cta-description {
  font-size: var(--md-sys-typescale-body-large);
  color: var(--md-sys-color-on-secondary-container);
  margin-bottom: var(--spacing-xl);
}

.cta-note {
  margin-top: var(--spacing-md);
  color: var(--md-sys-color-on-surface-variant);
  font-size: var(--md-sys-typescale-body-small);
}

/* ===== Footer ===== */
.footer {
  padding: var(--spacing-3xl) 0 var(--spacing-lg);
  background-color: var(--md-sys-color-surface-container-low);
  border-top: 1px solid var(--md-sys-color-outline-variant);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

@media (max-width: 768px) {
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
}

.footer-brand .brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  text-decoration: none;
  color: inherit;
  width: fit-content;
  cursor: pointer;
}

.footer-tagline {
  color: var(--md-sys-color-on-surface-variant);
  font-size: var(--md-sys-typescale-body-small);
}

.footer-heading {
  font-size: var(--md-sys-typescale-title-small);
  margin-bottom: var(--spacing-md);
  color: var(--md-sys-color-on-surface);
}

.footer-section ul {
  list-style: none;
  margin: 0;
}

.footer-section li {
  margin-bottom: var(--spacing-sm);
}

.footer-section a {
  color: var(--md-sys-color-on-surface-variant);
  font-size: var(--md-sys-typescale-body-small);
}

.footer-section a:hover {
  color: var(--md-sys-color-primary);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--md-sys-color-outline-variant);
  color: var(--md-sys-color-on-surface-variant);
  font-size: var(--md-sys-typescale-body-small);
}

.footer-bottom p {
  margin: 0;
  padding: var(--spacing-xs) 0;
}

.footer-link {
  color: var(--md-sys-color-primary);
  text-decoration: none;
  font-weight: 500;
  transition: opacity 0.2s ease;
  border-bottom: 1px solid transparent;
}

.footer-link:hover {
  opacity: 0.8;
  border-bottom-color: var(--md-sys-color-primary);
}

/* ===== Page Hero (Privacy, Support Pages) ===== */
.page-hero {
  padding: var(--spacing-3xl) 0;
  background: linear-gradient(135deg, var(--md-sys-color-primary-container) 0%, var(--md-sys-color-secondary-container) 100%);
  text-align: center;
}

.page-hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero-icon {
  width: 80px;
  height: 80px;
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  border-radius: var(--md-sys-shape-corner-extra-large);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-lg);
}

.hero-icon .material-symbols-outlined {
  font-size: 48px;
}

.page-title {
  font-size: var(--md-sys-typescale-display-small);
  margin-bottom: var(--spacing-md);
  color: var(--md-sys-color-on-primary-container);
}

.page-subtitle {
  font-size: var(--md-sys-typescale-body-large);
  color: var(--md-sys-color-on-secondary-container);
  margin-bottom: var(--spacing-lg);
}

.badge-group {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Content Section ===== */
.content-section {
  padding: var(--spacing-3xl) 0;
}

.content-wrapper {
  max-width: 800px;
  margin: 0 auto;
}

.policy-content h2 {
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-md);
}

.policy-content h3 {
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

.policy-content .lead {
  font-size: var(--md-sys-typescale-body-large);
  color: var(--md-sys-color-on-surface-variant);
  margin-bottom: var(--spacing-lg);
}

.summary-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-2xl) 0;
}

.summary-card {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background-color: var(--md-sys-color-surface-container);
  border-radius: var(--md-sys-shape-corner-large);
  border-left: 4px solid var(--md-sys-color-primary);
}

.summary-card .material-symbols-outlined {
  color: var(--md-sys-color-primary);
  font-size: 28px;
}

.summary-card h4 {
  font-size: var(--md-sys-typescale-title-medium);
  margin-bottom: var(--spacing-xs);
}

.summary-card p {
  color: var(--md-sys-color-on-surface-variant);
  margin: 0;
}

.update-info {
  margin-top: var(--spacing-2xl);
  padding: var(--spacing-lg);
  background-color: var(--md-sys-color-surface-container-low);
  border-radius: var(--md-sys-shape-corner-medium);
  font-size: var(--md-sys-typescale-body-small);
  color: var(--md-sys-color-on-surface-variant);
}

/* ===== Uninstall Page ===== */
.uninstall-page {
  padding: var(--spacing-3xl) 0;
}

.uninstall-content {
  max-width: 900px;
  margin: 0 auto;
}

.uninstall-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.sad-icon {
  font-size: 80px;
  margin-bottom: var(--spacing-md);
}

.uninstall-title {
  font-size: var(--md-sys-typescale-display-small);
  margin-bottom: var(--spacing-md);
}

.uninstall-description {
  font-size: var(--md-sys-typescale-body-large);
  color: var(--md-sys-color-on-surface-variant);
  max-width: 600px;
  margin: 0 auto;
}

.reinstall-card {
  background: linear-gradient(135deg, var(--md-sys-color-primary-container) 0%, var(--md-sys-color-secondary-container) 100%);
  border-radius: var(--md-sys-shape-corner-extra-large);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

.reinstall-card .card-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

@media (max-width: 768px) {
  .reinstall-card .card-content {
    flex-direction: column;
    text-align: center;
  }
}

.card-icon {
  width: 64px;
  height: 64px;
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  border-radius: var(--md-sys-shape-corner-large);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.card-icon .material-symbols-outlined {
  font-size: 36px;
}

.card-text {
  flex: 1;
}

.card-text h3 {
  margin-bottom: var(--spacing-xs);
  color: var(--md-sys-color-on-primary-container);
}

.card-text p {
  color: var(--md-sys-color-on-secondary-container);
  margin: 0;
}

.feedback-section {
  margin: var(--spacing-2xl) 0;
}

.feedback-title {
  text-align: center;
  margin-bottom: var(--spacing-sm);
}

.feedback-subtitle {
  text-align: center;
  color: var(--md-sys-color-on-surface-variant);
  margin-bottom: var(--spacing-xl);
}

.form-container {
  background-color: var(--md-sys-color-surface-container-low);
  border-radius: var(--md-sys-shape-corner-extra-large);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.google-form {
  border-radius: var(--md-sys-shape-corner-large);
}

.manual-feedback-card {
  text-align: center;
  padding: var(--spacing-lg);
  background-color: var(--md-sys-color-surface-container);
  border-radius: var(--md-sys-shape-corner-large);
}

.email-link {
  font-weight: 500;
  color: var(--md-sys-color-primary);
}

.alternatives-section {
  margin-top: var(--spacing-3xl);
}

.alternatives-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.alt-card {
  padding: var(--spacing-lg);
  background-color: var(--md-sys-color-surface-container);
  border-radius: var(--md-sys-shape-corner-large);
  text-align: center;
}

.alt-card .material-symbols-outlined {
  font-size: 48px;
  color: var(--md-sys-color-primary);
  margin-bottom: var(--spacing-md);
}

.alt-card h4 {
  margin-bottom: var(--spacing-sm);
}

.alt-card p {
  color: var(--md-sys-color-on-surface-variant);
  font-size: var(--md-sys-typescale-body-small);
  margin-bottom: var(--spacing-md);
}

.link-arrow {
  color: var(--md-sys-color-primary);
  font-weight: 500;
  text-decoration: none;
}

.link-arrow:hover {
  text-decoration: underline;
}

/* ===== Support Page ===== */
.guide-steps {
  margin: var(--spacing-2xl) 0;
}

.guide-step {
  display: flex;
  gap: var(--spacing-lg);
  padding: var(--spacing-lg);
  background-color: var(--md-sys-color-surface-container);
  border-radius: var(--md-sys-shape-corner-large);
  margin-bottom: var(--spacing-md);
}

@media (max-width: 768px) {
  .guide-step {
    flex-direction: column;
    text-align: center;
  }
}

.guide-step .step-number {
  width: 48px;
  height: 48px;
  margin: 0;
}

.step-content h3 {
  margin-bottom: var(--spacing-xs);
}

.step-content p {
  margin: 0;
  color: var(--md-sys-color-on-surface-variant);
}

/* Keyboard Shortcuts */
.shortcuts-section {
  margin: var(--spacing-3xl) 0;
}

.shortcuts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.shortcut-card {
  padding: var(--spacing-lg);
  background-color: var(--md-sys-color-surface-container);
  border-radius: var(--md-sys-shape-corner-medium);
  text-align: center;
}

.shortcut-keys {
  margin-bottom: var(--spacing-sm);
}

kbd {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: var(--md-sys-color-surface-container-highest);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-extra-small);
  font-family: monospace;
  font-size: var(--md-sys-typescale-body-small);
  font-weight: 500;
  box-shadow: 0 2px 0 var(--md-sys-color-outline-variant);
}

.shortcut-card p {
  margin: 0;
  font-size: var(--md-sys-typescale-body-small);
  color: var(--md-sys-color-on-surface-variant);
}

/* FAQ */
.faq-section {
  margin: var(--spacing-3xl) 0;
}

.faq-list {
  margin-top: var(--spacing-lg);
}

.faq-item {
  background-color: var(--md-sys-color-surface-container);
  border-radius: var(--md-sys-shape-corner-large);
  margin-bottom: var(--spacing-md);
  overflow: hidden;
  transition: all var(--md-sys-motion-duration-medium) var(--md-sys-motion-easing-standard);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg);
  cursor: pointer;
  font-weight: 500;
  font-size: var(--md-sys-typescale-title-medium);
  user-select: none;
  transition: background-color var(--md-sys-motion-duration-short);
}

.faq-question:hover {
  background-color: var(--md-sys-color-surface-container-high);
}

.faq-question .material-symbols-outlined {
  transition: transform var(--md-sys-motion-duration-medium) var(--md-sys-motion-easing-emphasized);
}

.faq-item[open] .faq-question .material-symbols-outlined {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 var(--spacing-lg) var(--spacing-lg);
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.6;
  padding-top: var(--spacing-md);
  animation: fadeIn var(--md-sys-motion-duration-medium) var(--md-sys-motion-easing-standard);
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.faq-answer p {
  margin-bottom: var(--spacing-sm);
}

/* Contact Section */
.contact-section {
  margin-top: var(--spacing-3xl);
  padding-top: var(--spacing-3xl);
  border-top: 1px solid var(--md-sys-color-outline-variant);
}

.contact-simple {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
  padding: var(--spacing-2xl);
  background: linear-gradient(135deg, 
    var(--md-sys-color-surface-container-low) 0%, 
    var(--md-sys-color-surface-container) 100%);
  border-radius: var(--md-sys-shape-corner-extra-large);
  border: 1px solid var(--md-sys-color-outline-variant);
}

.contact-icon {
  font-size: 56px !important;
  color: var(--md-sys-color-primary);
  display: block;
  margin-bottom: var(--spacing-md);
  opacity: 0.9;
}

.contact-simple h2 {
  font-size: var(--md-sys-typescale-headline-medium);
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
  color: var(--md-sys-color-on-surface);
}

.contact-description {
  font-size: var(--md-sys-typescale-body-large);
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.6;
  margin-bottom: var(--spacing-lg);
}

.contact-email {
  display: inline-block;
  font-size: var(--md-sys-typescale-title-large);
  font-weight: 500;
  color: var(--md-sys-color-primary);
  text-decoration: none;
  padding: var(--spacing-md) var(--spacing-xl);
  background-color: var(--md-sys-color-primary-container);
  border-radius: var(--md-sys-shape-corner-medium);
  transition: all 0.2s ease;
  margin-bottom: var(--spacing-md);
}

.contact-email:hover {
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(103, 80, 164, 0.2);
}

.contact-note {
  font-size: var(--md-sys-typescale-body-small);
  color: var(--md-sys-color-on-surface-variant);
  margin-top: var(--spacing-md);
  margin-bottom: 0;
}

/* ===== Utility Classes ===== */
.hidden {
  display: none !important;
}

.text-center {
  text-align: center;
}

.navbar-minimal {
  position: relative;
}

.footer-minimal {
  padding: var(--spacing-lg) 0;
}

.cta-simple {
  padding: var(--spacing-2xl) 0;
}

/* ===== Animated Highlight Title ===== */
.hero-title {
  position: relative;
  display: inline-block;
}

/* Realistic text selection - applies to each line separately */
.hero-title .highlight-word {
  position: relative;
  display: inline-block;
  padding: 4px 0;
  z-index: 1;
}

.hero-title .highlight-word::before {
  content: '';
  position: absolute;
  top: 0px;
  left: -4px;
  right: -4px;
  bottom: 0;
  width: 0;
  background-color: var(--theme-color);
  opacity: 0;
  border-radius: 0;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

/* First line: "Read Faster." */
.hero-title .highlight-word:first-child::before {
  animation: selectLine1 5s ease-in-out infinite;
}

/* Second line: "Comprehend Better." */
.hero-title .highlight-word:last-child::before {
  animation: selectLine2 5s ease-in-out infinite;
}

/* Line 1 selection animation - VERY visible */
@keyframes selectLine1 {
  0% {
    width: 0;
    opacity: 0;
  }
  5% {
    width: 0;
    opacity: 0.4;
  }
  20% {
    width: calc(100% + 8px);
    opacity: 0.4;
  }
  55% {
    width: calc(100% + 8px);
    opacity: 0.4;
  }
  65% {
    width: calc(100% + 8px);
    opacity: 0;
  }
  100% {
    width: calc(100% + 8px);
    opacity: 0;
  }
}

/* Line 2 selection animation - starts after line 1 */
@keyframes selectLine2 {
  0% {
    width: 0;
    opacity: 0;
  }
  20% {
    width: 0;
    opacity: 0;
  }
  25% {
    width: 0;
    opacity: 0.4;
  }
  40% {
    width: calc(100% + 8px);
    opacity: 0.4;
  }
  55% {
    width: calc(100% + 8px);
    opacity: 0.4;
  }
  65% {
    width: calc(100% + 8px);
    opacity: 0;
  }
  100% {
    width: calc(100% + 8px);
    opacity: 0;
  }
}

/* Dynamic theme colors based on selection */
:root {
  --theme-color: #6750A4;
  --theme-color-light: rgba(103, 80, 164, 0.1);
  --theme-color-container: #EADDFF;
}

/* Theme colors are applied via --theme-color variable */
/* No need for individual color classes anymore */

/* Theme-dependent elements (apply to both html and body for instant loading) */
html.theme-purple,
body.theme-purple {
  --theme-color: #6750A4;
  --theme-color-light: rgba(103, 80, 164, 0.1);
  --theme-color-container: #EADDFF;
}

html.theme-green,
body.theme-green {
  --theme-color: #00C853;
  --theme-color-light: rgba(0, 200, 83, 0.1);
  --theme-color-container: #C8E6C9;
}

html.theme-blue,
body.theme-blue {
  --theme-color: #2196F3;
  --theme-color-light: rgba(33, 150, 243, 0.1);
  --theme-color-container: #BBDEFB;
}

html.theme-orange,
body.theme-orange {
  --theme-color: #F57C00;
  --theme-color-light: rgba(245, 124, 0, 0.1);
  --theme-color-container: #FFE0B2;
}

/* Apply theme color to all primary elements */
html .btn-primary,
body .btn-primary {
  background-color: var(--theme-color) !important;
  color: var(--md-sys-color-on-primary) !important;
  box-shadow: var(--md-sys-elevation-level2) !important;
}

html .btn-primary:hover,
body .btn-primary:hover {
  box-shadow: var(--md-sys-elevation-level4) !important;
}

.btn-outlined {
  border-color: var(--theme-color) !important;
  color: var(--theme-color) !important;
}

.btn-outlined:hover {
  background-color: var(--theme-color-light) !important;
}

.feature-icon {
  background-color: var(--theme-color-container) !important;
}

.feature-icon .material-symbols-outlined {
  color: var(--theme-color) !important;
}

.step-number {
  background-color: var(--theme-color) !important;
}

.stat-value {
  color: var(--theme-color) !important;
}

.nav-link.active,
.link-arrow,
.email-link,
.footer-link,
a {
  color: var(--theme-color) !important;
}

.footer-link:hover {
  border-bottom-color: var(--theme-color) !important;
}

.summary-card {
  border-left-color: var(--theme-color) !important;
}

.summary-card .material-symbols-outlined,
.contact-icon,
.contact-email,
.alt-card .material-symbols-outlined {
  color: var(--theme-color) !important;
}

.contact-email:hover {
  background-color: var(--theme-color) !important;
  color: white !important;
}

.cta {
  background: linear-gradient(135deg, var(--theme-color-container) 0%, var(--theme-color-light) 100%) !important;
}

.page-hero {
  background: linear-gradient(135deg, var(--theme-color-container) 0%, var(--theme-color-light) 100%) !important;
}

.hero-icon {
  background-color: var(--theme-color) !important;
}

.reinstall-card {
  background: linear-gradient(135deg, var(--theme-color-container) 0%, var(--theme-color-light) 100%) !important;
}

.card-icon {
  background-color: var(--theme-color) !important;
}

.speed-value {
  color: var(--theme-color) !important;
}

.slider-fill {
  background-color: var(--theme-color) !important;
}

.status-dot.status-playing {
  background-color: var(--theme-color) !important;
}

/* Smooth preview card animations */
.preview-card {
  animation: floatUp 3s ease-in-out infinite;
}

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

/* Color button interaction */
.color-btn {
  position: relative;
  overflow: hidden;
}

.color-btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.4);
  transform: translate(-50%, -50%);
  transition: width 0.4s, height 0.4s;
}

.color-btn:active::after {
  width: 100px;
  height: 100px;
}

/* Feature cards entrance animation */
.feature-card {
  animation: fadeInUp 0.6s ease-out backwards;
}

.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }
.feature-card:nth-child(5) { animation-delay: 0.5s; }
.feature-card:nth-child(6) { animation-delay: 0.6s; }

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Step cards stagger animation */
.step-card {
  animation: scaleIn 0.5s ease-out backwards;
}

.step-card:nth-child(1) { animation-delay: 0.1s; }
.step-card:nth-child(2) { animation-delay: 0.3s; }
.step-card:nth-child(3) { animation-delay: 0.5s; }

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Button hover effects */
.btn-primary {
  position: relative;
  transition: all var(--md-sys-motion-duration-medium);
}

.btn-primary .material-symbols-outlined,
.btn-primary span {
  position: relative;
  z-index: 2;
}

.btn-primary:hover {
  filter: brightness(1.1);
  box-shadow: var(--md-sys-elevation-level4);
}

.btn-primary:active {
  transform: scale(0.98);
  box-shadow: var(--md-sys-elevation-level1);
}

/* Feedback Form Styles */
.feedback-form {
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-weight: 500;
  color: var(--md-sys-color-on-surface);
  margin-bottom: var(--spacing-sm);
  font-size: var(--md-sys-typescale-body-large);
}

.radio-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.radio-option {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  border: 2px solid var(--md-sys-color-outline);
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition: all 0.2s ease;
}

.radio-option:hover {
  border-color: var(--md-sys-color-primary);
  background-color: rgba(103, 80, 164, 0.05);
}

.radio-option input[type="radio"] {
  width: 20px;
  height: 20px;
  cursor: pointer;
  accent-color: var(--md-sys-color-primary);
}

.radio-option input[type="radio"]:checked {
  background-color: var(--md-sys-color-primary);
}

.radio-option span {
  flex: 1;
  color: var(--md-sys-color-on-surface);
  font-size: var(--md-sys-typescale-body-medium);
}

.form-textarea,
.form-input {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px solid var(--md-sys-color-outline);
  border-radius: var(--border-radius-md);
  font-family: inherit;
  font-size: var(--md-sys-typescale-body-medium);
  color: var(--md-sys-color-on-surface);
  background-color: var(--md-sys-color-surface);
  transition: border-color 0.2s ease;
  resize: vertical;
}

.form-textarea:focus,
.form-input:focus {
  outline: none;
  border-color: var(--md-sys-color-primary);
  box-shadow: 0 0 0 3px rgba(103, 80, 164, 0.1);
}

.form-hint {
  display: block;
  margin-top: var(--spacing-xs);
  color: var(--md-sys-color-on-surface-variant);
  font-size: var(--md-sys-typescale-body-small);
}

.form-message {
  padding: var(--spacing-md);
  border-radius: var(--border-radius-md);
  margin-bottom: var(--spacing-md);
  font-size: var(--md-sys-typescale-body-medium);
  display: none;
}

.form-message.success {
  display: block;
  background-color: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.form-message.error {
  display: block;
  background-color: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

.submit-btn {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--md-sys-typescale-body-large);
}

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