:root {
  --bg: #f8f8fc;
  --surface: #ffffff;
  --surface-2: #f0f0f6;
  --border: #e0e0ea;
  --primary: #7c6aff;
  --primary-end: #a78bfa;
  --text-primary: #1a1a24;
  --text-secondary: #5c5c6e;
  --seg-track-bg: #f0f0f6;
  --seg-inactive-bg: rgba(124, 106, 255, 0.14);
  --seg-inactive-text: #6b4fe0;
  --seg-active-text: #ffffff;
  --nav-bg: rgba(248, 248, 252, 0.88);
  --focus-ring: rgba(124, 106, 255, 0.12);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 40px rgba(124, 106, 255, 0.12);
  --transition: 300ms ease;
}

[data-theme="dark"] {
  --bg: #0a0a0f;
  --surface: #13131a;
  --surface-2: #1c1c26;
  --border: #2a2a3a;
  --text-primary: #e8e8f0;
  --text-secondary: #888899;
  --seg-track-bg: #1c1c26;
  --seg-inactive-bg: rgba(124, 106, 255, 0.18);
  --seg-inactive-text: #a78bfa;
  --nav-bg: rgba(10, 10, 15, 0.85);
  --focus-ring: rgba(124, 106, 255, 0.15);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 12px 40px rgba(124, 106, 255, 0.2);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-primary);
  background: var(--bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

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

.terms-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.terms-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 24px;
  margin: 0 10px;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.terms-header__actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}

.logo span {
  color: var(--primary-end);
}

.logo__icon {
  border-radius: 8px;
}

.theme-toggle,
.lang-toggle {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--border);
  border-radius: 100px;
  background: var(--seg-track-bg);
}

.theme-toggle__btn,
.lang-toggle__pill {
  border: none;
  background: var(--seg-inactive-bg);
  color: var(--seg-inactive-text);
  border-radius: 100px;
  cursor: pointer;
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
}

.theme-toggle__btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 10px;
}

.lang-toggle__pill {
  padding: 8px 16px;
  font-size: 13px;
}

.theme-toggle__btn--active,
.lang-toggle__pill--active {
  background: linear-gradient(135deg, var(--primary), var(--primary-end));
  color: var(--seg-active-text);
  box-shadow: var(--shadow-lg);
}

.terms-hero {
  padding: 60px 24px 40px;
  text-align: center;
  background: linear-gradient(180deg, var(--bg) 0%, var(--surface-2) 100%);
  border-bottom: 1px solid var(--border);
}

.terms-hero__eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary-end);
  margin-bottom: 12px;
}

.terms-hero__title {
  font-size: clamp(32px, 6vw, 48px);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
}

.terms-hero__subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.terms-hero__effective {
  font-size: 14px;
  color: var(--text-secondary);
  opacity: 0.75;
}

.terms-layout {
  flex: 1;
  display: grid;
  grid-template-columns: 250px minmax(0, 900px) 220px;
  gap: 0;
  max-width: 1440px;
  margin: 0 auto;
  width: 100%;
  padding: 0 24px 80px;
}

.toc {
  position: sticky;
  top: 100px;
  align-self: start;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
  padding: 24px 24px 24px 0;
  border-right: 1px solid var(--border);
}

.toc__title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.toc__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.toc__link {
  display: block;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition), background var(--transition);
}

.toc__link:hover {
  color: var(--primary);
  background: var(--focus-ring);
  text-decoration: none;
}

.toc__link--active {
  color: var(--primary);
  font-weight: 600;
  background: var(--focus-ring);
}

.toc-mobile {
  display: none;
  margin-bottom: 24px;
}

.toc-mobile summary {
  cursor: pointer;
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  font-weight: 600;
  color: var(--text-primary);
  list-style: none;
}

.toc-mobile summary::-webkit-details-marker {
  display: none;
}

.toc-mobile[open] summary {
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
}

.toc-mobile .toc__list {
  padding: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 12px 12px;
}

.terms-main {
  padding: 40px 40px 40px 32px;
  opacity: 1;
  transition: opacity var(--transition);
}

.terms-main--fading {
  opacity: 0.6;
}

.terms-section {
  scroll-margin-top: 100px;
  padding-bottom: 32px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--border);
}

.terms-section:last-of-type {
  border-bottom: none;
  margin-bottom: 0;
}

.terms-section h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.terms-section p,
.terms-section li {
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.8;
}

.terms-section p + p,
.terms-section ul {
  margin-top: 12px;
}

.terms-section ul {
  padding-left: 24px;
}

.terms-section li + li {
  margin-top: 8px;
}

.terms-meta {
  position: sticky;
  top: 100px;
  align-self: start;
  padding: 24px 0 24px 24px;
}

.meta-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  box-shadow: var(--shadow-md);
}

.meta-card + .meta-card {
  margin-top: 16px;
}

.meta-card__label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.meta-card__value {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.meta-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 10px 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-2);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.meta-btn:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
  text-decoration: none;
}

.meta-btn + .meta-btn {
  margin-top: 10px;
}

.meta-btn--primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-end));
  border-color: transparent;
  color: #fff;
}

.terms-footer {
  margin-top: auto;
  padding: 32px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 13px;
  color: var(--text-secondary);
}

.terms-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 90;
  width: 48px;
  height: 48px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--surface);
  color: var(--primary);
  font-size: 20px;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition), box-shadow var(--transition);
}

.back-to-top--visible {
  opacity: 1;
  pointer-events: auto;
}

.back-to-top:hover {
  box-shadow: var(--shadow-lg);
}

@media (max-width: 1023px) {
  .terms-layout {
    grid-template-columns: 1fr;
    padding: 0 20px 60px;
  }

  .toc,
  .terms-meta {
    display: none;
  }

  .toc-mobile {
    display: block;
  }

  .terms-main {
    padding: 24px 0;
  }

  .terms-header {
    padding: 12px 16px;
  }

  .lang-toggle__pill {
    padding: 6px 12px;
  }

  .terms-hero {
    padding: 40px 20px 32px;
  }
}

@media print {
  .terms-header,
  .toc,
  .toc-mobile,
  .terms-meta,
  .back-to-top,
  .terms-footer {
    display: none !important;
  }

  .terms-layout {
    display: block;
    padding: 0;
  }

  .terms-main {
    padding: 0;
  }

  body {
    background: #fff;
    color: #000;
  }

  .terms-section p,
  .terms-section li {
    color: #333;
  }
}