/* MediaHub Official Site — Glassmorphism Design System
   Primary: #26273E | Style: Glassmorphism | Font: Inter */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --primary: #26273E;
  --primary-light: #3d3e5c;
  --primary-dark: #1a1b2e;
  --accent: #5b5faa;
  --accent-bright: #7c81d4;
  --cta: #4f9cf9;
  --cta-hover: #6bafff;
  --glass-bg: rgba(255, 255, 255, 0.08);
  --glass-bg-strong: rgba(255, 255, 255, 0.15);
  --glass-border: 1px solid rgba(255, 255, 255, 0.18);
  --blur-amount: 16px;
  --text: #f1f3f9;
  --text-muted: rgba(241, 243, 249, 0.75);
  --text-soft: rgba(241, 243, 249, 0.55);
  --surface: rgba(38, 39, 62, 0.6);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: 180ms ease;
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text);
  background: var(--primary);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(91, 95, 170, 0.35), transparent),
    radial-gradient(ellipse 60% 40% at 100% 50%, rgba(79, 156, 249, 0.15), transparent),
    radial-gradient(ellipse 50% 30% at 0% 80%, rgba(124, 129, 212, 0.2), transparent);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

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

a:focus-visible {
  outline: 2px solid var(--cta);
  outline-offset: 3px;
}

/* ─── Glass panel ─── */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur-amount));
  -webkit-backdrop-filter: blur(var(--blur-amount));
  border: var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.glass-strong {
  background: var(--glass-bg-strong);
  backdrop-filter: blur(var(--blur-amount));
  -webkit-backdrop-filter: blur(var(--blur-amount));
  border: var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* ─── Layout ─── */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

@media (min-width: 768px) {
  .container { padding: 0 32px; }
}

@media (min-width: 1024px) {
  .container { padding: 0 40px; }
}

/* ─── Nav ─── */
.site-nav {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  width: calc(100% - 32px);
  max-width: 640px;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: box-shadow var(--transition), background var(--transition);
}

.site-nav.scrolled {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur-amount));
  -webkit-backdrop-filter: blur(var(--blur-amount));
  border: var(--glass-border);
  box-shadow: var(--shadow);
}

.site-nav .logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.9375rem;
  font-weight: 500;
}

.nav-links a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
  font-size: 0.875rem;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.lang-toggle:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.18);
}

.lang-toggle[aria-pressed="true"] {
  color: var(--text);
  background: var(--glass-bg-strong);
  border-color: rgba(255, 255, 255, 0.2);
}

/* ─── Hero ─── */
.hero {
  padding: 140px 0 80px;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  padding: 6px 14px;
  margin-bottom: 20px;
  border-radius: 999px;
  background: var(--glass-bg);
  border: var(--glass-border);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-muted);
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 16px;
  color: var(--text);
}

.hero p {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 520px;
  margin: 0 auto 32px;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 48px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9375rem;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
  border: none;
  text-decoration: none;
}

.btn:focus-visible {
  outline: 2px solid var(--cta);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--cta);
  color: #fff;
  box-shadow: 0 4px 20px rgba(79, 156, 249, 0.4);
}

.btn-primary:hover {
  background: var(--cta-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(79, 156, 249, 0.45);
}

.btn-secondary {
  background: var(--glass-bg);
  color: var(--text);
  border: var(--glass-border);
}

.btn-secondary:hover {
  background: var(--glass-bg-strong);
  border-color: rgba(255, 255, 255, 0.25);
}

/* Device mockup placeholder */
.hero-mockup {
  max-width: 320px;
  margin: 0 auto;
  padding: 24px;
  border-radius: 24px;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--blur-amount));
  -webkit-backdrop-filter: blur(var(--blur-amount));
  border: var(--glass-border);
  box-shadow: var(--shadow), 0 0 0 1px rgba(0,0,0,0.05) inset;
}

.hero-mockup-inner {
  aspect-ratio: 9 / 19;
  border-radius: 12px;
  background: var(--primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-soft);
  font-size: 0.875rem;
}

/* ─── Sections ─── */
.section {
  padding: 64px 0;
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  text-align: center;
  margin-bottom: 12px;
  color: var(--text);
}

.section-desc {
  text-align: center;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto 40px;
  font-size: 1rem;
}

/* Features grid */
.features {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 640px) {
  .features { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .features { grid-template-columns: repeat(3, 1fr); }
}

.feature-card {
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
  cursor: default;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.feature-card:hover {
  background: var(--glass-bg-strong);
  border-color: rgba(255, 255, 255, 0.22);
  transform: translateY(-2px);
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(79, 156, 249, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cta);
}

.feature-icon svg {
  width: 22px;
  height: 22px;
}

.feature-card h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text);
}

.feature-card p {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* ─── CTA block ─── */
.cta-block {
  padding: 72px 0;
  text-align: center;
}

.cta-block .glass {
  padding: 48px 24px;
  max-width: 560px;
  margin: 0 auto;
}

.cta-block h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}

.cta-block p {
  color: var(--text-muted);
  margin-bottom: 24px;
  font-size: 1rem;
}

/* ─── Footer ─── */
.site-footer {
  padding: 32px 0 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  text-align: center;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 20px;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.footer-links a:hover {
  color: var(--text);
}

.footer-copy {
  font-size: 0.875rem;
  color: var(--text-soft);
}

/* ─── Legal pages (shared) ─── */
.legal-page {
  padding: 100px 0 60px;
  min-height: 100vh;
}

.legal-page .container {
  max-width: 720px;
}

.legal-page h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.legal-page h2 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-top: 28px;
  margin-bottom: 8px;
  color: var(--text);
}

.legal-page p,
.legal-page li {
  color: var(--text-muted);
  margin-bottom: 10px;
  font-size: 0.9375rem;
  line-height: 1.65;
}

.legal-page ul {
  padding-left: 1.25rem;
  margin-bottom: 12px;
}

.legal-page .back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 24px;
  color: var(--text-muted);
  font-size: 0.9375rem;
  cursor: pointer;
}

.legal-page .back-link:hover {
  color: var(--text);
}

.legal-page .updated {
  margin-top: 32px;
  font-size: 0.875rem;
  color: var(--text-soft);
}

.legal-page table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 0.875rem;
}

.legal-page th,
.legal-page td {
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 12px 14px;
  text-align: left;
  color: var(--text-muted);
}

.legal-page th {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  font-weight: 600;
}

.legal-page tr:nth-child(even) td {
  background: rgba(255, 255, 255, 0.03);
}

.legal-page .permission-list {
  list-style: none;
  padding-left: 0;
}

.legal-page .permission-list li {
  margin: 14px 0;
}

.legal-page .permission-list strong {
  display: block;
  margin-bottom: 4px;
  color: var(--text);
}

.legal-page .permission-list span {
  color: var(--text-muted);
  font-size: 0.9em;
}

.legal-page .highlight {
  background: rgba(79, 156, 249, 0.15);
  padding: 0.15em 0.4em;
  border-radius: 4px;
}

/* Utility: hide by lang */
[data-lang="en"] .lang-zh,
[data-lang="zh"] .lang-en {
  display: none;
}