/* ==========================================================================
   The Racetimer Website - Main Stylesheet
   Design system matching iOS app aesthetic
   ========================================================================== */

/* CSS Variables - Design System
   ========================================================================== */

:root {
  /* Modern Ocean-Inspired Palette */
  --gradient-title: linear-gradient(135deg, #0a1128 0%, #001f54 50%, #034078 100%);
  --gradient-start: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 100%);
  --gradient-finish: linear-gradient(135deg, #1e3a8a 0%, #0ea5e9 50%, #06b6d4 100%);
  --gradient-history: linear-gradient(135deg, #06ffa5 0%, #00d4aa 100%);
  --gradient-hero: linear-gradient(135deg, #0a1128 0%, #001f54 30%, #0284c7 70%, #06b6d4 100%);
  --gradient-card: linear-gradient(135deg, #fef3c7 0%, #fcd34d 100%);

  /* Accent Gradients */
  --gradient-accent-1: linear-gradient(135deg, #ff6b6b 0%, #feca57 100%);
  --gradient-accent-2: linear-gradient(135deg, #0ea5e9 0%, #06b6d4 100%);
  --gradient-accent-3: linear-gradient(135deg, #34d399 0%, #10b981 100%);

  --color-primary: #0284c7;
  --color-secondary: #0ea5e9;
  --color-accent: #ff6b6b;
  --color-cyan: #06b6d4;
  --color-teal: #14b8a6;
  --color-coral: #ff6b6b;

  --color-bg-light: #fafbff;
  --color-bg-dark: #0f0c29;
  --color-bg-card: rgba(255, 255, 255, 0.9);
  --color-text-primary: #FFFFFF;
  --color-text-secondary: rgba(255, 255, 255, 0.85);
  --color-text-dark: #2d3748;
  --color-text-muted: #4a5568;

  /* Typography */
  --font-system: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Courier New', monospace;

  /* Spacing */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 40px;
  --spacing-xl: 64px;

  /* Border Radius */
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --radius-button: 50px;
  --radius-icon: 50%;

  /* Modern Shadows with Ocean Tints */
  --shadow-sm: 0 2px 10px rgba(2, 132, 199, 0.08);
  --shadow-md: 0 8px 30px rgba(2, 132, 199, 0.12);
  --shadow-lg: 0 20px 60px rgba(6, 182, 212, 0.2);
  --shadow-colored: 0 10px 40px rgba(255, 107, 107, 0.3);

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Styles
   ========================================================================== */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-system);
  line-height: 1.6;
  color: var(--color-text-dark);
  background: var(--color-bg-light);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--spacing-sm) 0;
  font-weight: 700;
  line-height: 1.2;
}

h1 {
  font-size: 3rem;
  font-weight: 800;
}

h2 {
  font-size: 2.5rem;
  font-weight: 700;
}

h3 {
  font-size: 2rem;
  font-weight: 700;
}

h4 {
  font-size: 1.5rem;
  font-weight: 600;
}

p {
  margin: 0 0 var(--spacing-sm) 0;
}

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

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

/* Container & Layout
   ========================================================================== */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-narrow {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

section {
  padding: var(--spacing-xl) 0;
  position: relative;
}

section h2 {
  background: var(--gradient-title);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Header & Navigation
   ========================================================================== */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 4px 30px rgba(2, 132, 199, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  z-index: 1000;
  transition: transform var(--transition-normal), background var(--transition-normal);
}

.site-header.hidden {
  transform: translateY(-100%);
}

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

.site-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-title);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.site-logo img {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
}

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

.nav-menu a {
  color: var(--color-text-dark);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-menu a:hover {
  background: linear-gradient(135deg, rgba(2, 132, 199, 0.1), rgba(6, 182, 212, 0.1));
  transform: translateY(-1px);
  opacity: 1;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  color: var(--color-text-dark);
  z-index: 1001;
}

.nav-toggle svg {
  width: 24px;
  height: 24px;
  transition: transform var(--transition-fast);
}

.nav-toggle .icon-close {
  display: none;
}

.nav-toggle[aria-expanded="true"] .icon-menu {
  display: none;
}

.nav-toggle[aria-expanded="true"] .icon-close {
  display: block;
}

/* Hero Section
   ========================================================================== */

.hero {
  background: var(--gradient-hero);
  color: var(--color-text-primary);
  text-align: center;
  padding: calc(80px + var(--spacing-xl)) 0 var(--spacing-xl) 0;
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  50% { transform: translate(-20px, 20px) rotate(5deg); }
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-content h1 {
  font-size: 3.5rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-text-primary);
  font-weight: 800;
  letter-spacing: -0.02em;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.hero-content p {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  max-width: 700px;
  margin: 0 auto var(--spacing-lg) auto;
  line-height: 1.8;
}

/* Buttons
   ========================================================================== */

.btn {
  display: inline-block;
  padding: 18px 40px;
  border-radius: var(--radius-button);
  font-weight: 600;
  font-size: 1rem;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
  text-decoration: none;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.5s;
}

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

.btn:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: var(--shadow-lg);
  opacity: 1;
}

.btn-primary {
  background: var(--gradient-finish);
  color: var(--color-text-primary);
}

.btn-primary:hover {
  box-shadow: 0 15px 50px rgba(6, 182, 212, 0.5);
}

.btn-secondary {
  background: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 100%);
  color: var(--color-text-primary);
}

.btn-secondary:hover {
  box-shadow: 0 15px 50px rgba(255, 107, 107, 0.4);
}

.app-store-badge {
  display: inline-block;
  transition: transform var(--transition-fast);
}

.app-store-badge:hover {
  transform: scale(1.05);
  opacity: 1;
}

.app-store-badge img {
  height: 60px;
  width: auto;
}

/* Feature Cards
   ========================================================================== */

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.feature-card {
  background: var(--color-bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(255, 255, 255, 0.5);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-title);
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-lg);
  border-color: rgba(6, 182, 212, 0.4);
}

.feature-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal);
  color: #fff;
}

.feature-icon svg {
  width: 28px;
  height: 28px;
  stroke: #fff;
}

.feature-card:hover .feature-icon {
  transform: scale(1.1) rotate(5deg);
}

.feature-icon.blue {
  background: var(--gradient-finish);
}

.feature-icon.orange {
  background: var(--gradient-start);
}

.feature-icon.purple {
  background: var(--gradient-accent-3);
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
}

.feature-card p {
  color: #4a5568;
  margin-bottom: 0;
  line-height: 1.6;
}

/* Mode Cards
   ========================================================================== */

.modes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.mode-card {
  background: var(--color-bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  border: 2px solid rgba(255, 255, 255, 0.5);
  transition: all var(--transition-normal);
  position: relative;
}

.mode-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  padding: 2px;
  background: var(--gradient-title);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.mode-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.mode-card:hover::after {
  opacity: 1;
}

.mode-card h3 {
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
}

.mode-card ul {
  list-style: none;
  padding: 0;
  margin: var(--spacing-md) 0;
}

.mode-card li {
  padding: var(--spacing-xs) 0;
  padding-left: 28px;
  position: relative;
}

.mode-card li:before {
  content: "✓";
  position: absolute;
  left: 0;
  background: var(--gradient-title);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: bold;
  font-size: 1.1rem;
}

/* Video Section
   ========================================================================== */

.video-container {
  max-width: 900px;
  margin: var(--spacing-lg) auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.video-container video {
  width: 100%;
  display: block;
}

.video-placeholder {
  background: var(--gradient-accent-2);
  color: var(--color-text-primary);
  padding: var(--spacing-xl);
  text-align: center;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.video-placeholder::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1), transparent);
  transform: translate(-50%, -50%);
  animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.5; }
  50% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.3; }
}

/* Guide Page
   ========================================================================== */

.guide-section {
  margin-bottom: var(--spacing-xl);
}

.guide-section h2 {
  background: var(--gradient-title);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-lg);
}

.steps {
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.05), rgba(6, 182, 212, 0.08));
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin: var(--spacing-md) 0;
  border: 1px solid rgba(6, 182, 212, 0.2);
  box-shadow: var(--shadow-sm);
}

.steps ol {
  margin: 0;
  padding-left: var(--spacing-md);
}

.steps li {
  padding: var(--spacing-xs) 0;
  font-size: 1.125rem;
  color: var(--color-text-dark);
}

.tips-box {
  background: linear-gradient(135deg, rgba(255, 107, 107, 0.08), rgba(254, 202, 87, 0.08));
  border-left: 4px solid;
  border-image: var(--gradient-start) 1;
  border-radius: var(--radius-sm);
  padding: var(--spacing-md);
  margin: var(--spacing-md) 0;
  box-shadow: var(--shadow-sm);
}

.tips-box h4 {
  background: var(--gradient-start);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-sm);
}

/* Support Page
   ========================================================================== */

.faq-item {
  background: var(--color-bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(255, 255, 255, 0.5);
  transition: all var(--transition-normal);
}

.faq-item:hover {
  transform: translateX(5px);
  box-shadow: var(--shadow-md);
  border-color: rgba(6, 182, 212, 0.4);
}

.faq-item h3 {
  background: var(--gradient-title);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

.faq-item p {
  margin-bottom: 0;
  color: #4a5568;
  line-height: 1.7;
}

.contact-box {
  background: var(--gradient-title);
  color: var(--color-text-primary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  margin: var(--spacing-xl) 0;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.contact-box::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%);
  animation: shine 3s infinite;
}

@keyframes shine {
  0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
  100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

.contact-box a {
  color: var(--color-text-primary);
  text-decoration: underline;
  font-weight: 600;
}

/* Legal Pages (Privacy, Terms)
   ========================================================================== */

.legal-content {
  background: var(--color-bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(255, 255, 255, 0.5);
  max-width: 800px;
  margin: 0 auto;
}

.legal-content h2 {
  background: var(--gradient-title);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.legal-content h3 {
  color: var(--color-text-dark);
  font-size: 1.25rem;
  margin-top: var(--spacing-md);
}

.legal-content ul {
  padding-left: var(--spacing-md);
}

.legal-content li {
  margin-bottom: var(--spacing-xs);
}

/* Footer
   ========================================================================== */

.site-footer {
  background: linear-gradient(135deg, #0a1128 0%, #001f54 50%, #034078 100%);
  color: var(--color-text-secondary);
  padding: var(--spacing-xl) 0 var(--spacing-md) 0;
  text-align: center;
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(6, 182, 212, 0.5), transparent);
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--spacing-md) 0;
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--color-text-secondary);
}

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

.copyright {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.5);
}

/* Utility Classes
   ========================================================================== */

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

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

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

/* Responsive Design
   ========================================================================== */

@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  .hero-content h1 {
    font-size: 2.5rem;
  }

  .hero-content p {
    font-size: 1.125rem;
  }

  .nav-menu {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-lg);
    border-top: 1px solid rgba(6, 182, 212, 0.1);
    gap: var(--spacing-xs);
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-menu a {
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 1.1rem;
  }

  .nav-menu a:hover {
    background: linear-gradient(135deg, rgba(2, 132, 199, 0.1), rgba(6, 182, 212, 0.1));
  }

  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .modes-grid {
    grid-template-columns: 1fr;
  }

  section {
    padding: var(--spacing-lg) 0;
  }
}

@media (max-width: 480px) {
  .hero {
    min-height: 70vh;
  }

  .hero-content h1 {
    font-size: 2rem;
  }

  .app-store-badge img {
    height: 50px;
  }

  .feature-card,
  .mode-card {
    padding: var(--spacing-md);
  }
}