/* ============================================
   Zero Hour: D-Day — Global Stylesheet
   ============================================ */

/* --- Font Import (Pretendard) --- */
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/variable/pretendardvariable-dynamic-subset.min.css');

/* --- CSS Custom Properties --- */
:root {
  /* Colors */
  --color-white: #FFFFFF;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F8F9FB;
  --color-bg-warm: #FFFDF8;
  --color-gold: #D4A853;
  --color-gold-light: #F0E1C0;
  --color-gold-dark: #B8912E;
  --color-blue: #A8C8E8;
  --color-blue-light: #D6E8F7;
  --color-blue-pale: #EDF4FA;
  --color-text: #2D2D2D;
  --color-text-sub: #6B7280;
  --color-text-light: #9CA3AF;
  --color-border: #E5E7EB;
  --color-shadow: rgba(0, 0, 0, 0.06);

  /* Typography */
  --font-family: 'Pretendard Variable', 'Pretendard', -apple-system, BlinkMacSystemFont,
    'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3.25rem;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Layout */
  --max-width: 1120px;
  --border-radius: 16px;
  --border-radius-sm: 10px;
  --border-radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.35s ease;
  --transition-slow: 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 400;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: var(--color-gold-dark);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

ul,
ol {
  list-style: none;
}

/* --- Utility --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

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

/* --- Animation Classes --- */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

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

.fade-in-delay-1 {
  transition-delay: 0.1s;
}

.fade-in-delay-2 {
  transition-delay: 0.2s;
}

.fade-in-delay-3 {
  transition-delay: 0.3s;
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: var(--space-md) 0;
  transition: background-color var(--transition-base),
    box-shadow var(--transition-base),
    padding var(--transition-base);
}

.navbar.is-scrolled {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 12px var(--color-shadow);
  padding: var(--space-sm) 0;
}

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

.navbar__logo {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.navbar__logo span {
  color: var(--color-gold);
}

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

.navbar__links a {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-sub);
  transition: color var(--transition-fast);
}

.navbar__links a:hover {
  color: var(--color-gold-dark);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(80px + var(--space-3xl)) var(--space-lg) var(--space-3xl);
  background: linear-gradient(
    170deg,
    var(--color-bg) 0%,
    var(--color-blue-pale) 40%,
    var(--color-bg-warm) 100%
  );
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -120px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--color-gold-light) 0%, transparent 70%);
  opacity: 0.4;
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -80px;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, var(--color-blue-light) 0%, transparent 70%);
  opacity: 0.35;
  border-radius: 50%;
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 640px;
}

.hero__badge {
  display: inline-block;
  padding: 6px 18px;
  background-color: var(--color-gold-light);
  color: var(--color-gold-dark);
  font-size: var(--font-size-xs);
  font-weight: 600;
  border-radius: var(--border-radius-full);
  letter-spacing: 0.04em;
  margin-bottom: var(--space-lg);
  text-transform: uppercase;
}

.hero__title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

.hero__title .highlight {
  background: linear-gradient(135deg, var(--color-gold) 0%, var(--color-gold-dark) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: var(--font-size-lg);
  font-weight: 400;
  color: var(--color-text-sub);
  line-height: 1.8;
  margin-bottom: var(--space-2xl);
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 16px 36px;
  background: linear-gradient(135deg, #000000 0%, #1a1a1a 100%);
  color: var(--color-white);
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: var(--border-radius-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.hero__cta:hover {
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.hero__cta svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

/* ============================================
   Features Section
   ============================================ */
.features {
  padding: var(--space-4xl) var(--space-lg);
  background-color: var(--color-bg);
}

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

.section-label {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-gold);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

.section-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.section-title br {
  display: none;
}

.features__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  max-width: 960px;
  margin: 0 auto;
}

.feature-card {
  background-color: var(--color-bg-alt);
  border-radius: var(--border-radius);
  padding: var(--space-2xl);
  border: 1px solid var(--color-border);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px var(--color-shadow);
}

.feature-card__icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: var(--space-lg);
}

.feature-card__icon--gold {
  background: linear-gradient(135deg, var(--color-gold-light) 0%, #fdf3df 100%);
}

.feature-card__icon--blue {
  background: linear-gradient(135deg, var(--color-blue-light) 0%, #edf4fb 100%);
}

.feature-card__icon--warm {
  background: linear-gradient(135deg, #fce8d5 0%, #fef5ee 100%);
}

.feature-card__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
  letter-spacing: -0.01em;
}

.feature-card__desc {
  font-size: var(--font-size-base);
  color: var(--color-text-sub);
  line-height: 1.75;
  margin-bottom: var(--space-lg);
}

/* Progress Bar */
.progress-bar {
  width: 100%;
  height: 10px;
  background-color: var(--color-border);
  border-radius: var(--border-radius-full);
  overflow: hidden;
}

.progress-bar__fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-gold-light) 0%, var(--color-gold) 100%);
  border-radius: var(--border-radius-full);
  transition: width 1.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.progress-bar__fill.is-animated {
  width: 72%;
}

.progress-label {
  display: flex;
  justify-content: space-between;
  margin-top: var(--space-xs);
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  font-weight: 500;
}

/* Feature Tags */
.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.feature-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 14px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-text-sub);
}

/* ============================================
   CTA Section
   ============================================ */
.cta-section {
  padding: var(--space-4xl) var(--space-lg);
  background: linear-gradient(
    170deg,
    var(--color-bg-warm) 0%,
    var(--color-blue-pale) 100%
  );
  text-align: center;
}

.cta-section__title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

.cta-section__desc {
  font-size: var(--font-size-base);
  color: var(--color-text-sub);
  margin-bottom: var(--space-2xl);
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  padding: var(--space-2xl) var(--space-lg);
  background-color: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
}

.footer .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
  text-align: center;
}

.footer__links {
  display: flex;
  gap: var(--space-lg);
}

.footer__links a {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-sub);
}

.footer__links a:hover {
  color: var(--color-gold-dark);
}

.footer__contact {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

.footer__contact a {
  color: var(--color-text-sub);
  font-weight: 500;
}

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

/* ============================================
   Legal Pages (Privacy & Terms)
   ============================================ */
.legal-page {
  padding-top: calc(80px + var(--space-2xl));
  padding-bottom: var(--space-4xl);
}

.legal-page .container {
  max-width: 780px;
}

.legal-header {
  margin-bottom: var(--space-3xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-border);
}

.legal-header__title {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.legal-header__meta {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

.legal-content h2 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-xs);
  border-bottom: 2px solid var(--color-gold-light);
  letter-spacing: -0.01em;
}

.legal-content h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
}

.legal-content p {
  font-size: var(--font-size-base);
  color: var(--color-text-sub);
  line-height: 1.85;
  margin-bottom: var(--space-md);
}

.legal-content ul,
.legal-content ol {
  margin-bottom: var(--space-md);
  padding-left: var(--space-xl);
}

.legal-content ul {
  list-style: disc;
}

.legal-content ol {
  list-style: decimal;
}

.legal-content li {
  font-size: var(--font-size-base);
  color: var(--color-text-sub);
  line-height: 1.85;
  margin-bottom: var(--space-xs);
}

.legal-content .en {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  font-style: italic;
  margin-top: -0.5rem;
  margin-bottom: var(--space-md);
}

.legal-content .highlight-box {
  background-color: var(--color-bg-alt);
  border-left: 4px solid var(--color-gold);
  padding: var(--space-lg);
  border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
  margin-bottom: var(--space-lg);
}

.legal-content .highlight-box p {
  margin-bottom: 0;
  color: var(--color-text);
  font-weight: 500;
}

.legal-back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-sub);
  margin-bottom: var(--space-xl);
  transition: color var(--transition-fast);
}

.legal-back:hover {
  color: var(--color-gold-dark);
}

/* ============================================
   Responsive — Tablet (768px+)
   ============================================ */
@media (min-width: 768px) {
  .hero__title {
    font-size: var(--font-size-4xl);
  }

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

  .section-title {
    font-size: var(--font-size-3xl);
  }

  .section-title br {
    display: block;
  }

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

  .features__grid .feature-card:last-child {
    grid-column: 1 / -1;
    max-width: 480px;
    justify-self: center;
  }

  .footer .container {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }

  .cta-section__title {
    font-size: var(--font-size-3xl);
  }
}

/* ============================================
   Responsive — Desktop (1024px+)
   ============================================ */
@media (min-width: 1024px) {
  .hero {
    padding-top: calc(80px + var(--space-4xl));
    padding-bottom: var(--space-4xl);
  }

  .hero__title {
    font-size: var(--font-size-5xl);
  }

  .features__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .features__grid .feature-card:last-child {
    grid-column: auto;
    max-width: none;
    justify-self: auto;
  }

  .feature-card {
    padding: var(--space-2xl) var(--space-xl);
  }
}