/* ALOT Design - EN Site CSS */
/* Design System Reference: design-system-reference.md */

/* --- CSS Custom Properties --- */
:root {
  --magenta: #AC225C;
  --magenta-light: #FF4DA6;
  --magenta-dark: #B0176E;
  --black: #000000;
  --white: #FFFFFF;
  --gray-100: #F5F5F5;
  --gray-200: #E5E5E5;
  --gray-400: #A3A3A3;
  --gray-600: #666666;
  --gray-800: #262626;
  --rainbow-1: #FF2D92;
  --rainbow-2: #7C5CFC;
  --rainbow-3: #00D4AA;
  --rainbow-4: #FFD93D;
  --rainbow-5: #FF6B35;
  --font-display: 'Space Grotesk', 'Noto Sans TC', sans-serif;
  --font-body: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
  --space-3xl: 8rem;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 20px;
}

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

html {
  font-size: 16px;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--black);
  background: var(--white);
  line-height: 1.6;
}

/* --- Typography Tokens --- */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 var(--space-md);
}

h1 {
  font-size: clamp(2.2rem, 6vw, 4.5rem);
  letter-spacing: -0.03em;
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  letter-spacing: -0.03em;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: -0.03em;
}

h4 {
  font-size: 1.5rem;
  letter-spacing: 0;
}

p {
  margin: 0 0 var(--space-md);
}

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

a:hover {
  color: var(--magenta-dark);
  text-decoration: underline;
}

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

/* --- Header --- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
}

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

.header-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--magenta);
  text-decoration: none;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
}

.header-logo-img {
  height: 40px;
  width: auto;
  max-width: 160px;
  object-fit: contain;
}

@media (max-width: 1024px) {
  .header-logo-img {
    height: 34px;
  }
}

.header-logo:hover {
  text-decoration: none;
  color: var(--magenta-dark);
}

/* --- Navigation --- */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.nav a {
  color: var(--black);
  font-weight: 500;
  font-size: 0.95rem;
}

.nav a:hover {
  color: var(--magenta);
  text-decoration: none;
}

.nav .nav-lang {
  font-weight: 700;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
}

.nav .nav-lang.active {
  background: var(--gray-100);
  color: var(--magenta);
  border: 1px solid var(--magenta);
}

/* --- Hero --- */
.hero {
  padding: var(--space-2xl) 0;
  background: linear-gradient(135deg, var(--magenta) 0%, var(--magenta-dark) 50%, var(--magenta-light) 100%);
  color: var(--white);
  text-align: center;
}

.hero h1 {
  color: var(--white);
  margin-bottom: var(--space-md);
}

.hero p {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  margin-bottom: var(--space-xl);
}

.hero .btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: var(--white);
  color: var(--magenta);
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.hero .btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 24px rgba(172, 34, 92, 0.4);
}

/* --- Section --- */
.section {
  padding: var(--space-2xl) 0;
}

.section-light {
  background: var(--white);
}

.section-dark {
  background: var(--gray-800);
  color: var(--white);
}

.section-dark h2,
.section-dark h3,
.section-dark p {
  color: var(--white);
}

.section-dark a {
  color: var(--magenta-light);
}

.section-dark a:hover {
  color: var(--white);
}

/* --- Cards Grid --- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
}

.card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
}

.card h3 {
  margin-top: 0;
  color: var(--magenta);
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-fast);
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
}

.btn-primary {
  background: var(--magenta);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--magenta-dark);
  color: var(--white);
}

.btn-secondary {
  background: transparent;
  color: var(--magenta);
  border: 1px solid var(--magenta);
}

.btn-secondary:hover {
  background: var(--magenta);
  color: var(--white);
}

/* --- Footer --- */
.footer {
  background: var(--gray-800);
  color: var(--white);
  padding: var(--space-xl) 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
}

.footer h3 {
  color: var(--white);
  margin-bottom: var(--space-sm);
}

.footer p {
  color: var(--gray-400);
  margin: 0 0 var(--space-xs);
}

.footer a {
  color: var(--gray-400);
  text-decoration: none;
}

.footer a:hover {
  color: var(--white);
  text-decoration: underline;
}

.footer-credits {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--gray-600);
  text-align: center;
  font-size: 0.85rem;
  color: var(--gray-400);
}

/* --- Language Switcher --- */
.lang-switch {
  display: flex;
  gap: var(--space-xs);
}

/* --- Mobile Responsive --- */
@media (max-width: 1024px) {
  .header-inner {
    height: 64px;
  }
  .container {
    padding: 0 var(--space-sm);
  }
}

@media (max-width: 768px) {
  .nav {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
  }
  .hero {
    padding: var(--space-xl) 0;
  }
  .hero h1 {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
  }
}

@media (max-width: 480px) {
  .cards {
    grid-template-columns: 1fr;
  }
  .section {
    padding: var(--space-lg) 0;
  }
  .container {
    padding: 0 var(--space-xs);
  }
}

/* --- Fade Animations --- */
.fade-in {
  animation: fadeIn 0.6s ease-out forwards;
  opacity: 0;
  transform: translateY(20px);
}

@keyframes fadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}