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

:root {
  --bg-deep: #040a14;
  --bg-mid: #0a1628;
  --card-bg: #0f1e35;
  --card-border: #1a2e4a;
  --accent: #38bdf8;
  --accent-dim: rgba(56, 189, 248, 0.15);
  --text: #e2e8f0;
  --text-muted: #7a91ad;
  --font-display: 'Orbitron', sans-serif;
  --font-body: 'Inter', sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg-deep);
  color: var(--text);
  font-family: var(--font-body);
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 500px;
  background: radial-gradient(ellipse, rgba(56, 189, 248, 0.07) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* TOP BAR */
.top-bar {
  position: fixed;
  top: 20px;
  left: 20px;
  right: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 1000;
  pointer-events: none;
}

.back-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  background: rgba(9, 18, 34, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(56, 189, 248, 0.18);
  border-radius: 12px;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  pointer-events: all;
  transition: color .2s, background .2s, border-color .2s;
}

.back-btn:hover {
  color: var(--accent);
  background: var(--accent-dim);
  border-color: rgba(56, 189, 248, 0.35);
}

.back-btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.lang-switcher {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 8px;
  background: rgba(9, 18, 34, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(56, 189, 248, 0.18);
  border-radius: 12px;
  pointer-events: all;
}

.lang-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  border-radius: 8px;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: color .2s, background .2s, border-color .2s;
}

.lang-btn:hover {
  color: var(--accent);
  background: var(--accent-dim);
}

.lang-btn.active {
  color: var(--accent);
  background: var(--accent-dim);
  border-color: rgba(56, 189, 248, 0.3);
}

.lang-sep {
  color: var(--card-border);
  font-size: 11px;
  user-select: none;
}

/* PAGE HEADER */
.page-header {
  padding: 90px 20px 60px;
  text-align: center;
  position: relative;
  z-index: 1;
}

.page-eyebrow {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(56, 189, 248, 0.25);
  padding: 5px 14px;
  border-radius: 100px;
  margin-bottom: 20px;
  animation: fadeUp .6s ease both;
}

.page-header h1 {
  font-family: var(--font-display);
  font-size: clamp(22px, 4vw, 40px);
  font-weight: 900;
  letter-spacing: -0.5px;
  line-height: 1.2;
  margin-bottom: 14px;
  animation: fadeUp .6s .1s ease both;
}

.page-header h1 span {
  color: var(--accent);
}

.page-header .meta {
  font-size: 13px;
  color: var(--text-muted);
  animation: fadeUp .6s .2s ease both;
}

/* CONTENT */
.content-wrap {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 20px 100px;
  position: relative;
  z-index: 1;
}

.toc {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 24px 26px;
  margin-bottom: 40px;
  animation: fadeUp .6s .35s ease both;
}

.toc-title {
  font-family: var(--font-display);
  font-size: 10px;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.toc ol {
  list-style: none;
  counter-reset: toc;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 6px 24px;
}

.toc ol li {
  counter-increment: toc;
}

.toc ol li a {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  text-decoration: none;
  padding: 5px 0;
  transition: color .2s;
}

.toc ol li a::before {
  content: counter(toc, decimal-leading-zero) ".";
  font-family: var(--font-display);
  font-size: 10px;
  color: var(--accent);
  opacity: .7;
  flex-shrink: 0;
}

.toc ol li a:hover {
  color: var(--accent);
}

.terms-section {
  margin-bottom: 36px;
  animation: fadeUp .6s .4s ease both;
}

.section-num {
  font-family: var(--font-display);
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--accent);
  opacity: .6;
  margin-bottom: 6px;
  display: block;
}

.terms-section h2 {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .5px;
  color: var(--text);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--card-border);
}

.terms-section p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 12px;
}

.terms-section ul, .terms-section ol {
  padding-left: 20px;
  margin-bottom: 12px;
}

.terms-section li {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 6px;
}

.terms-section li::marker {
  color: var(--accent);
}

.terms-section a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 189, 248, 0.3);
  transition: border-color .2s;
}

.terms-section a:hover {
  border-color: var(--accent);
}

.highlight-box {
  background: var(--accent-dim);
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-left: 3px solid var(--accent);
  border-radius: 0 10px 10px 0;
  padding: 14px 18px;
  margin: 16px 0;
}

.highlight-box p {
  font-size: 13px;
  color: var(--text);
  margin: 0;
  line-height: 1.7;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.terms-section:nth-child(2) { animation-delay: .45s; }
.terms-section:nth-child(3) { animation-delay: .5s; }
.terms-section:nth-child(4) { animation-delay: .55s; }
.terms-section:nth-child(5) { animation-delay: .6s; }
.terms-section:nth-child(6) { animation-delay: .65s; }
.terms-section:nth-child(7) { animation-delay: .7s; }
.terms-section:nth-child(8) { animation-delay: .75s; }
.terms-section:nth-child(9) { animation-delay: .8s; }
.terms-section:nth-child(10) { animation-delay: .85s; }

/* Fade transition for language switch */
.fade-out {
  opacity: 0;
  transition: opacity 0.18s ease;
}

.fade-in {
  opacity: 1;
  transition: opacity 0.22s ease;
}

#main-content {
  opacity: 1;
}