/* ==========================================================================
   beViral Website - Design System
   Based on UX Design Specification (Dark Mode)
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables (Design Tokens)
   -------------------------------------------------------------------------- */
:root {
  /* Background Colors */
  --bg-primary: #0D0D0D;
  --bg-secondary: #1A1A1A;
  --bg-tertiary: #262626;

  /* Text Colors */
  --text-primary: #FFFFFF;
  --text-secondary: #A0A0A0;
  --text-tertiary: #666666;

  /* Accent Colors */
  --accent-primary: #FF2D55;
  --accent-gradient-start: #FF2D55;
  --accent-gradient-end: #FF6B6B;

  /* System Colors */
  --success: #34C759;
  --warning: #FF9500;
  --error: #FF3B30;

  /* Feature Colors */
  --viral-ideas-accent: #0f3460;
  --sounds-accent: #4a1c6e;
  --academy-accent: #1a4d3e;

  /* Spacing */
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 28px;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 17px;
  --font-size-lg: 20px;
  --font-size-xl: 24px;
  --font-size-2xl: 28px;
  --font-size-3xl: 34px;
  --font-size-4xl: 48px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;

  /* Container */
  --container-max: 1200px;
  --container-narrow: 800px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
  opacity: 0.8;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container--narrow {
  max-width: var(--container-narrow);
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(13, 13, 13, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--bg-tertiary);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.header__logo {
  height: 40px;
  width: auto;
}

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

.header__link {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.header__link:hover {
  color: var(--text-primary);
  opacity: 1;
}

.header__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  background: linear-gradient(135deg, var(--accent-gradient-start), var(--accent-gradient-end));
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.header__cta:hover {
  transform: scale(1.02);
  box-shadow: 0 4px 20px rgba(255, 45, 85, 0.4);
  opacity: 1;
}

/* Mobile menu toggle */
.header__menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: var(--spacing-xs);
}

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

  .header__menu-toggle {
    display: block;
  }

  .header__nav--open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    gap: var(--spacing-md);
    border-bottom: 1px solid var(--bg-tertiary);
  }
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(72px + var(--spacing-3xl)) var(--spacing-md) var(--spacing-3xl);
  background:
    radial-gradient(ellipse at 50% 0%, rgba(255, 45, 85, 0.15) 0%, transparent 50%),
    var(--bg-primary);
}

.hero__content {
  max-width: 700px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.hero__badge-dot {
  width: 8px;
  height: 8px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

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

.hero__title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__title-accent {
  background: linear-gradient(135deg, var(--accent-gradient-start), var(--accent-gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  line-height: 1.6;
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  background: linear-gradient(135deg, var(--accent-gradient-start), var(--accent-gradient-end));
  color: var(--text-primary);
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.hero__cta:hover {
  transform: scale(1.05);
  box-shadow: 0 8px 30px rgba(255, 45, 85, 0.5);
  opacity: 1;
}

.hero__cta-icon {
  width: 24px;
  height: 24px;
}

@media (max-width: 768px) {
  .hero__title {
    font-size: var(--font-size-3xl);
  }

  .hero__subtitle {
    font-size: var(--font-size-base);
  }
}

/* --------------------------------------------------------------------------
   Features Section
   -------------------------------------------------------------------------- */
.features {
  padding: var(--spacing-3xl) var(--spacing-md);
  background: var(--bg-secondary);
}

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

.features__title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.features__subtitle {
  color: var(--text-secondary);
  font-size: var(--font-size-base);
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  max-width: 900px;
  margin: 0 auto;
}

.feature-card {
  padding: var(--spacing-lg);
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: transform var(--transition-base), border-color var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.1);
}

.feature-card--viral-ideas {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
}

.feature-card--sounds {
  background: linear-gradient(135deg, #1a1a2e 0%, #2d1b4e 50%, #4a1c6e 100%);
}

.feature-card--analytics {
  background: linear-gradient(135deg, #1a1a2e 0%, #2e1a1a 50%, #4a1c1c 100%);
}

.feature-card--academy {
  background: linear-gradient(135deg, #1a1a2e 0%, #1e3a2f 50%, #1a4d3e 100%);
}

.feature-card__icon {
  font-size: 32px;
  margin-bottom: var(--spacing-sm);
}

.feature-card__title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.feature-card__description {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.5;
}

@media (max-width: 640px) {
  .features__grid {
    grid-template-columns: 1fr;
  }
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
  padding: var(--spacing-2xl) var(--spacing-md);
  background: var(--bg-primary);
  border-top: 1px solid var(--bg-tertiary);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-lg);
  text-align: center;
}

.footer__logo {
  height: 32px;
  width: auto;
  opacity: 0.8;
}

.footer__links {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
  justify-content: center;
}

.footer__link {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.footer__link:hover {
  color: var(--text-primary);
  opacity: 1;
}

.footer__copyright {
  color: var(--text-tertiary);
  font-size: var(--font-size-xs);
}

.footer__tagline {
  color: var(--text-tertiary);
  font-size: var(--font-size-sm);
}

/* --------------------------------------------------------------------------
   Legal Pages
   -------------------------------------------------------------------------- */
.legal {
  padding: calc(72px + var(--spacing-2xl)) var(--spacing-md) var(--spacing-3xl);
  min-height: 100vh;
}

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

.legal__title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.legal__updated {
  color: var(--text-tertiary);
  font-size: var(--font-size-sm);
}

.legal__content {
  color: var(--text-secondary);
  line-height: 1.7;
}

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

.legal__content h2 {
  color: var(--text-primary);
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

.legal__content ul {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
}

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

.legal__content strong {
  color: var(--text-primary);
  font-weight: 600;
}

.legal__important-box {
  background: var(--bg-tertiary);
  border-left: 4px solid var(--accent-primary);
  padding: var(--spacing-md);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: var(--spacing-lg) 0;
}

.legal__contact {
  margin-top: var(--spacing-2xl);
  padding: var(--spacing-lg);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
}

.legal__contact-title {
  color: var(--text-primary);
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.legal__contact p {
  margin-bottom: var(--spacing-xs);
}

.legal__contact a {
  color: var(--accent-primary);
}

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}