/* ═══════════════════════════════════════════════════════════════════════════
   OUECH WEBSITE STYLES
   Design tokens from DesignTokens.md
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─────────────────────────────────────────────────────────────────────────────
   CSS CUSTOM PROPERTIES (Design Tokens)
   ───────────────────────────────────────────────────────────────────────────── */
:root {
  /* Primary Palette */
  --color-primary: #5B13EC;
  --color-primary-container: #EDE9FE;
  --color-primary-border: #DDD6FE;
  --color-primary-hover: #F5F3FF;

  /* Backgrounds */
  --color-background: #F6F6F8;
  --color-background-dark: #161022;
  --color-surface: #FFFFFF;
  --color-surface-dark: #1F1A2E;

  /* Text Colors */
  --color-text-primary: #131118;
  --color-text-secondary: #6B7280;
  --color-text-disabled: #9CA3AF;
  --color-text-light: #F3F4F6;

  /* Accent Colors */
  --color-accent-amber: #F59E0B;
  --color-accent-teal: #0F766E;

  /* Semantic Colors */
  --color-success: #22C55E;
  --color-warning: #F59E0B;
  --color-danger: #DC2626;

  /* Gray Scale */
  --gray-50: #F9FAFB;
  --gray-100: #F3F4F6;
  --gray-200: #E5E7EB;
  --gray-300: #D1D5DB;
  --gray-400: #9CA3AF;
  --gray-500: #6B7280;
  --gray-600: #4B5563;
  --gray-700: #374151;
  --gray-800: #1F2937;
  --gray-900: #111827;

  /* Spacing Scale */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 16px;
  --spacing-xl: 24px;
  --spacing-xxl: 32px;
  --spacing-xxxl: 48px;

  /* Border Radius */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Typography */
  --font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  /* Animation */
  --duration-fast: 100ms;
  --duration-normal: 200ms;
  --duration-slow: 300ms;
  --duration-page: 400ms;
  --ease-standard: ease-in-out;
  --ease-decelerate: ease-out;
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* ─────────────────────────────────────────────────────────────────────────────
   RESET & BASE
   ───────────────────────────────────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-weight: var(--font-weight-regular);
  line-height: 1.625;
  color: var(--color-text-primary);
  background-color: var(--color-background);
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--duration-normal) var(--ease-standard);
}

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

/* ─────────────────────────────────────────────────────────────────────────────
   TYPOGRAPHY
   ───────────────────────────────────────────────────────────────────────────── */
.display-large {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: var(--font-weight-extrabold);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.display-medium {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: var(--font-weight-extrabold);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.display-small {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: var(--font-weight-extrabold);
  line-height: 1.25;
  letter-spacing: -0.015em;
}

.headline-large {
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  line-height: 1.3;
  letter-spacing: -0.015em;
}

.headline-medium {
  font-size: 1.125rem;
  font-weight: var(--font-weight-bold);
  line-height: 1.35;
  letter-spacing: -0.015em;
}

.body-large {
  font-size: 1.125rem;
  font-weight: var(--font-weight-regular);
  line-height: 1.625;
}

.body-medium {
  font-size: 1rem;
  font-weight: var(--font-weight-regular);
  line-height: 1.5;
}

.body-small {
  font-size: 0.875rem;
  font-weight: var(--font-weight-regular);
  line-height: 1.5;
}

.label-large {
  font-size: 0.875rem;
  font-weight: var(--font-weight-bold);
  line-height: 1.4;
  letter-spacing: 0.01em;
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-primary) 0%, #8B5CF6 50%, var(--color-accent-amber) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-primary-color {
  color: var(--color-primary);
}

.text-amber {
  color: var(--color-accent-amber);
}

.text-light {
  color: var(--color-text-light);
}

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

/* ─────────────────────────────────────────────────────────────────────────────
   LAYOUT
   ───────────────────────────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container--narrow {
  max-width: 800px;
}

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

.section--hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

/* ─────────────────────────────────────────────────────────────────────────────
   HERO SECTION
   ───────────────────────────────────────────────────────────────────────────── */
.hero {
  background: linear-gradient(135deg, var(--color-background-dark) 0%, var(--color-primary) 50%, var(--color-background-dark) 100%);
  background-size: 200% 200%;
  animation: gradientShift 15s ease infinite;
  color: var(--color-text-light);
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 30% 70%, rgba(91, 19, 236, 0.3) 0%, transparent 50%),
              radial-gradient(circle at 70% 30%, rgba(245, 158, 11, 0.15) 0%, transparent 40%);
  pointer-events: none;
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: var(--spacing-xxxl) 0;
}

.hero__logo {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-xl);
}

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

.hero__subtitle {
  max-width: 600px;
  margin: 0 auto var(--spacing-xxl);
  opacity: 0.9;
}

/* ─────────────────────────────────────────────────────────────────────────────
   APP PREVIEW
   ───────────────────────────────────────────────────────────────────────────── */
.app-preview {
  position: relative;
  margin: var(--spacing-xxl) auto;
  max-width: 300px;
}

.app-preview__device {
  position: relative;
  background: linear-gradient(145deg, var(--gray-800), var(--gray-900));
  border-radius: 40px;
  padding: 12px;
  box-shadow: 
    0 25px 50px -12px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(255, 255, 255, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.app-preview__screen {
  background: var(--color-background);
  border-radius: 32px;
  overflow: hidden;
  aspect-ratio: 9 / 19.5;
  display: flex;
  align-items: center;
  justify-content: center;
}

.app-preview__placeholder {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--color-text-secondary);
}

.app-preview__placeholder-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

/* ─────────────────────────────────────────────────────────────────────────────
   MISSION TEASERS SECTION
   ───────────────────────────────────────────────────────────────────────────── */
.mission {
  background: var(--color-surface);
  position: relative;
}

.mission__block {
  padding: var(--spacing-xxxl) 0;
  border-bottom: 1px solid var(--gray-100);
}

.mission__block:last-child {
  border-bottom: none;
}

.mission__label {
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
  font-weight: var(--font-weight-semibold);
}

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

.mission__quote blockquote {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: var(--font-weight-medium);
  line-height: 1.4;
  color: var(--color-text-primary);
  position: relative;
  padding-left: var(--spacing-xl);
  border-left: 4px solid var(--color-primary);
}

.mission__quote--highlight {
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
}

/* Animation for mission blocks */
.mission__block {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s var(--ease-decelerate), transform 0.6s var(--ease-decelerate);
}

.mission__block.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─────────────────────────────────────────────────────────────────────────────
   DOWNLOAD CTA
   ───────────────────────────────────────────────────────────────────────────── */
.download {
  background: var(--color-background);
  text-align: center;
}

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

.download__buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  justify-content: center;
  margin-bottom: var(--spacing-xl);
}

.store-button {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-md);
  background: var(--color-text-primary);
  color: var(--color-text-light);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-md);
  transition: all var(--duration-normal) var(--ease-standard);
  text-decoration: none;
}

.store-button:hover {
  background: var(--color-primary);
  color: var(--color-text-light);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px -5px rgba(91, 19, 236, 0.3);
}

.store-button__icon {
  width: 28px;
  height: 28px;
}

.store-button__text {
  text-align: left;
}

.store-button__label {
  font-size: 0.7rem;
  opacity: 0.8;
  display: block;
}

.store-button__store {
  font-size: 1.1rem;
  font-weight: var(--font-weight-semibold);
}

/* ─────────────────────────────────────────────────────────────────────────────
   HEADER / NAVIGATION
   ───────────────────────────────────────────────────────────────────────────── */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--spacing-lg) 0;
  transition: background var(--duration-normal) var(--ease-standard);
}

.header.is-scrolled {
  background: rgba(22, 16, 34, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

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

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

.header__brand {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
}

.header__name {
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-light);
  letter-spacing: -0.02em;
  white-space: nowrap;
}

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

.header__link {
  color: var(--color-text-light);
  font-weight: var(--font-weight-medium);
  font-size: 0.875rem;
  opacity: 0.9;
  transition: opacity var(--duration-normal) var(--ease-standard);
}

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

/* ─────────────────────────────────────────────────────────────────────────────
   FOOTER
   ───────────────────────────────────────────────────────────────────────────── */
.footer {
  background: var(--color-background-dark);
  color: var(--color-text-light);
  padding: var(--spacing-xxxl) 0 var(--spacing-xl);
}

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

.footer__logo {
  height: 48px;
  width: auto;
}

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

.footer__link {
  color: var(--gray-400);
  font-size: 0.875rem;
  transition: color var(--duration-normal) var(--ease-standard);
}

.footer__link:hover {
  color: var(--color-text-light);
}

.footer__company {
  color: var(--gray-500);
  font-size: 0.75rem;
}

.footer__company a {
  color: var(--gray-400);
}

.footer__company a:hover {
  color: var(--color-text-light);
}

.footer__copyright {
  color: var(--gray-600);
  font-size: 0.75rem;
  margin-top: var(--spacing-lg);
}

/* ─────────────────────────────────────────────────────────────────────────────
   LEGAL PAGES (Privacy Policy & Terms)
   ───────────────────────────────────────────────────────────────────────────── */
.legal {
  padding-top: 100px;
  min-height: 100vh;
}

.legal__header {
  background: linear-gradient(135deg, var(--color-background-dark) 0%, var(--color-primary) 100%);
  color: var(--color-text-light);
  padding: var(--spacing-xxxl) 0;
  text-align: center;
}

.legal__content {
  padding: var(--spacing-xxxl) 0;
  background: var(--color-surface);
}

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

.legal__body h2 {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  margin-top: var(--spacing-xxl);
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-primary);
}

.legal__body h3 {
  font-size: 1.125rem;
  font-weight: var(--font-weight-semibold);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  color: var(--color-text-primary);
}

.legal__body p {
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-secondary);
}

.legal__body ul, .legal__body ol {
  margin-bottom: var(--spacing-lg);
  padding-left: var(--spacing-xl);
  color: var(--color-text-secondary);
}

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

.legal__body a {
  color: var(--color-primary);
  text-decoration: underline;
}

.legal__meta {
  margin-top: var(--spacing-xxl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--gray-200);
  font-size: 0.875rem;
  color: var(--gray-500);
}

/* ─────────────────────────────────────────────────────────────────────────────
   BUTTONS
   ───────────────────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-family: var(--font-family);
  font-size: 0.875rem;
  font-weight: var(--font-weight-bold);
  line-height: 1.4;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-standard);
  text-decoration: none;
}

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

.btn--primary:hover {
  background: #4A0FBF;
  color: var(--color-text-light);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px -5px rgba(91, 19, 236, 0.4);
}

.btn--outline {
  background: transparent;
  color: var(--color-text-light);
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn--outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
  color: var(--color-text-light);
}

/* ─────────────────────────────────────────────────────────────────────────────
   UTILITY CLASSES
   ───────────────────────────────────────────────────────────────────────────── */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mt-xxl { margin-top: var(--spacing-xxl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.mb-xxl { margin-bottom: var(--spacing-xxl); }

/* ─────────────────────────────────────────────────────────────────────────────
   RESPONSIVE
   ───────────────────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .section {
    padding: var(--spacing-xxl) 0;
  }

  .hero__content {
    padding: var(--spacing-xxl) 0;
  }

  .header__nav {
    display: none;
  }

  .mission__block {
    padding: var(--spacing-xxl) 0;
  }

  .mission__quote blockquote {
    padding-left: var(--spacing-lg);
  }

  .download__buttons {
    flex-direction: column;
    align-items: center;
  }

  .store-button {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }

  .footer__links {
    flex-direction: column;
    gap: var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-md);
  }

  .hero__logo {
    width: 60px;
    height: 60px;
  }

  .app-preview {
    max-width: 240px;
  }

  .app-preview__device {
    border-radius: 32px;
    padding: 8px;
  }

  .app-preview__screen {
    border-radius: 26px;
  }
}

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

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.animate-fade-in-up {
  animation: fadeInUp 0.8s var(--ease-decelerate) forwards;
}

.animate-fade-in {
  animation: fadeIn 0.6s var(--ease-decelerate) forwards;
}

.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }
.animate-delay-4 { animation-delay: 0.4s; }
.animate-delay-5 { animation-delay: 0.5s; }

/* Initial state for animated elements */
[class*="animate-fade"] {
  opacity: 0;
}