* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #1a1a2e;
  --accent: #4a90d9;
  --bg: #ffffff;
  --bg-alt: #f7f8fa;
  --text: #1a1a2e;
  --text-secondary: #6b7280;
  --border: #e5e7eb;
  --radius: 12px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  text-decoration: none;
}

.logo:hover {
  text-decoration: none;
}

.logo img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.logo-placeholder {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: image("/img/logo.png");
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  flex-shrink: 0;
}

.lang-switch {
  display: flex;
  gap: 4px;
  background: var(--bg-alt);
  border-radius: 8px;
  padding: 3px;
}

.lang-switch button {
  border: none;
  background: transparent;
  padding: 5px 14px;
  border-radius: 6px;
  font-size: 13px;
  cursor: pointer;
  color: var(--text-secondary);
  font-weight: 500;
  transition: all 0.2s;
}

.lang-switch button.active {
  background: #fff;
  color: var(--text);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

/* Hero */
.hero {
  text-align: center;
  padding: 80px 24px 40px;
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 42px;
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}

.hero p {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 32px;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary);
  color: #fff;
  padding: 14px 32px;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 600;
  transition: opacity 0.2s;
}

.download-btn:hover {
  opacity: 0.88;
  text-decoration: none;
}

.download-btn svg {
  width: 20px;
  height: 20px;
}

/* Carousel */
.carousel {
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

.carousel-viewport {
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-alt);
}

.carousel-track {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

.carousel-slide {
  min-width: 100%;
  position: relative;
}

.carousel-slide img {
  display: block;
  width: 100%;
  height: auto;
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-calc(50% + 20px));
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  transition: background 0.2s, box-shadow 0.2s;
  z-index: 2;
}

.carousel-btn:hover {
  background: #fff;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.carousel-prev {
  left: 36px;
}

.carousel-next {
  right: 36px;
}

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: none;
  background: var(--border);
  cursor: pointer;
  padding: 0;
  transition: background 0.2s, transform 0.2s;
}

.carousel-dot.active {
  background: var(--primary);
  transform: scale(1.25);
}

/* Footer */
.footer {
  margin-top: auto;
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-copyright {
  font-size: 13px;
  color: var(--text-secondary);
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 13px;
  color: var(--text-secondary);
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--text);
  text-decoration: none;
}

/* Subpage Content */
.page-content {
  max-width: 720px;
  margin: 0 auto;
  padding: 60px 24px 80px;
  flex: 1;
}

.page-content h1 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 8px;
}

.page-content .update-date {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 40px;
}

.page-content h2 {
  font-size: 20px;
  font-weight: 600;
  margin-top: 36px;
  margin-bottom: 12px;
}

.page-content p {
  margin-bottom: 16px;
  color: var(--text);
  line-height: 1.75;
}

.page-content ul {
  margin-bottom: 16px;
  padding-left: 20px;
}

.page-content li {
  margin-bottom: 8px;
  line-height: 1.75;
}

/* Support page */
.support-card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  margin: 40px 0;
}

.support-card .email {
  font-size: 22px;
  font-weight: 600;
  color: var(--accent);
  margin: 16px 0;
}

.support-card p {
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 30px;
  }

  .hero p {
    font-size: 16px;
  }

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

  .carousel-btn {
    width: 36px;
    height: 36px;
  }

  .carousel-prev {
    left: 28px;
  }

  .carousel-next {
    right: 28px;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}