:root {
  --ink: #f5f1ea;
  --ink-dim: rgba(245, 241, 234, 0.72);
  --ink-faint: rgba(245, 241, 234, 0.48);
  --ink-bright: #fffbf3;
  --accent: #ff9f45;
  --accent-ink: #241205;
  --accent-glow: rgba(255, 159, 69, 0.35);
  --glass-bg: rgba(16, 13, 34, 0.5);
  --glass-border: rgba(255, 255, 255, 0.14);
  --page-bg: #01123c;
  --radius-lg: 22px;
  --radius-md: 14px;
  --maxw: 1120px;
  --font-display: Georgia, "Iowan Old Style", "Palatino Linotype", "Times New Roman", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "SF Pro Text", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--page-bg);
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  background: var(--page-bg);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
}

.wrap {
  position: relative;
  z-index: 1;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 clamp(20px, 5vw, 48px);
}

/* ---------- Night sky, same starfield gradient as the homepage's night phase ---------- */
.night-sky {
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(1px 1px at 33.1% 10.7%, rgba(255, 255, 255, 0.39), transparent 100%),
    radial-gradient(1px 1px at 53.4% 23.2%, rgba(255, 255, 255, 0.85), transparent 100%),
    radial-gradient(2px 2px at 22.6% 7%, rgba(255, 255, 255, 0.39), transparent 100%),
    radial-gradient(1px 1px at 10.7% 26.6%, rgba(255, 255, 255, 0.87), transparent 100%),
    radial-gradient(1px 1px at 62.5% 35.8%, rgba(255, 255, 255, 0.67), transparent 100%),
    radial-gradient(1px 1px at 40.1% 58.6%, rgba(255, 255, 255, 0.66), transparent 100%),
    radial-gradient(1px 1px at 14.8% 46.3%, rgba(255, 255, 255, 0.66), transparent 100%),
    radial-gradient(1px 1px at 55.8% 71.6%, rgba(255, 255, 255, 0.67), transparent 100%),
    radial-gradient(1px 1px at 63.3% 53.6%, rgba(255, 255, 255, 0.66), transparent 100%),
    radial-gradient(2px 2px at 61.4% 60.8%, rgba(255, 255, 255, 0.78), transparent 100%),
    radial-gradient(1.5px 1.5px at 46.7% 85.6%, rgba(255, 255, 255, 0.51), transparent 100%),
    radial-gradient(1px 1px at 78.3% 42.5%, rgba(255, 255, 255, 0.4), transparent 100%),
    radial-gradient(1.5px 1.5px at 30.8% 30.7%, rgba(255, 255, 255, 0.75), transparent 100%),
    radial-gradient(1px 1px at 29.6% 68.9%, rgba(255, 255, 255, 0.63), transparent 100%),
    radial-gradient(2px 2px at 17.8% 61.8%, rgba(255, 255, 255, 0.58), transparent 100%),
    radial-gradient(1.5px 1.5px at 94.4% 16.5%, rgba(255, 255, 255, 0.54), transparent 100%),
    radial-gradient(2px 2px at 85.6% 55.8%, rgba(255, 255, 255, 0.39), transparent 100%),
    radial-gradient(1px 1px at 91% 37.7%, rgba(255, 255, 255, 0.38), transparent 100%),
    radial-gradient(2px 2px at 69.3% 19.5%, rgba(255, 255, 255, 0.51), transparent 100%),
    radial-gradient(1px 1px at 39% 40.8%, rgba(255, 255, 255, 0.87), transparent 100%),
    radial-gradient(2px 2px at 6.1% 77.4%, rgba(255, 255, 255, 0.38), transparent 100%),
    radial-gradient(1px 1px at 75.8% 79.5%, rgba(255, 255, 255, 0.57), transparent 100%),
    radial-gradient(ellipse 50% 30% at 82% 15%, rgba(120, 140, 220, 0.25), transparent 60%),
    linear-gradient(180deg, #011141 0%, #031853 15%, #0a2466 35%, #102c75 55%, #082155 75%, #01123c 100%);
}

.night-sky::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.12), rgba(0, 0, 0, 0.02) 30%, rgba(0, 0, 0, 0.02) 70%, rgba(0, 0, 0, 0.3));
}

/* ---------- Trail nav (same dot-and-dashed-line language as the homepage) ---------- */
.trail-nav {
  position: fixed;
  top: clamp(20px, 4vh, 36px);
  left: clamp(16px, 3vw, 32px);
  z-index: 50;
  display: flex;
  flex-direction: column;
}

.trail-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 8px 0;
  text-decoration: none;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.trail-item:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 4.5px;
  top: 24px;
  width: 0;
  height: calc(100% + 2px);
  border-left: 2px dashed rgba(255, 255, 255, 0.28);
}

.trail-item.visited:not(:last-child)::after {
  border-left-style: solid;
  border-left-color: var(--accent);
  opacity: 0.7;
}

.trail-dot {
  flex-shrink: 0;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: rgba(11, 15, 36, 0.6);
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.trail-label {
  color: var(--ink-dim);
  opacity: 0.9;
  text-shadow: 0 1px 10px rgba(0, 0, 0, 0.45);
}

.trail-item:hover .trail-label {
  color: var(--ink-bright);
  opacity: 1;
}

.trail-item.active .trail-dot {
  background: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 0 0 5px var(--accent-glow);
  transform: scale(1.2);
}

.trail-item.active .trail-label {
  color: var(--ink-bright);
  opacity: 1;
  font-weight: 700;
}

/* ---------- Mobile nav: hamburger + full-screen overlay ---------- */
.nav-toggle {
  display: none;
  position: fixed;
  top: 18px;
  right: 18px;
  z-index: 60;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 1px;
  background: var(--ink-bright);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 55;
  background:
    linear-gradient(180deg, rgba(1, 8, 30, 0.55), rgba(1, 8, 30, 0.75)),
    radial-gradient(1px 1px at 33.1% 10.7%, rgba(255, 255, 255, 0.39), transparent 100%),
    radial-gradient(1px 1px at 53.4% 23.2%, rgba(255, 255, 255, 0.85), transparent 100%),
    radial-gradient(2px 2px at 22.6% 7%, rgba(255, 255, 255, 0.39), transparent 100%),
    radial-gradient(1px 1px at 10.7% 26.6%, rgba(255, 255, 255, 0.87), transparent 100%),
    radial-gradient(1px 1px at 62.5% 35.8%, rgba(255, 255, 255, 0.67), transparent 100%),
    radial-gradient(1px 1px at 40.1% 58.6%, rgba(255, 255, 255, 0.66), transparent 100%),
    radial-gradient(1px 1px at 14.8% 46.3%, rgba(255, 255, 255, 0.66), transparent 100%),
    radial-gradient(1px 1px at 55.8% 71.6%, rgba(255, 255, 255, 0.67), transparent 100%),
    radial-gradient(1px 1px at 63.3% 53.6%, rgba(255, 255, 255, 0.66), transparent 100%),
    radial-gradient(2px 2px at 61.4% 60.8%, rgba(255, 255, 255, 0.78), transparent 100%),
    radial-gradient(1.5px 1.5px at 46.7% 85.6%, rgba(255, 255, 255, 0.51), transparent 100%),
    radial-gradient(1px 1px at 78.3% 42.5%, rgba(255, 255, 255, 0.4), transparent 100%),
    radial-gradient(1.5px 1.5px at 30.8% 30.7%, rgba(255, 255, 255, 0.75), transparent 100%),
    radial-gradient(1px 1px at 29.6% 68.9%, rgba(255, 255, 255, 0.63), transparent 100%),
    radial-gradient(2px 2px at 17.8% 61.8%, rgba(255, 255, 255, 0.58), transparent 100%),
    radial-gradient(1.5px 1.5px at 94.4% 16.5%, rgba(255, 255, 255, 0.54), transparent 100%),
    radial-gradient(2px 2px at 85.6% 55.8%, rgba(255, 255, 255, 0.39), transparent 100%),
    radial-gradient(1px 1px at 91% 37.7%, rgba(255, 255, 255, 0.38), transparent 100%),
    radial-gradient(2px 2px at 69.3% 19.5%, rgba(255, 255, 255, 0.51), transparent 100%),
    radial-gradient(1px 1px at 39% 40.8%, rgba(255, 255, 255, 0.87), transparent 100%),
    radial-gradient(2px 2px at 6.1% 77.4%, rgba(255, 255, 255, 0.38), transparent 100%),
    radial-gradient(1px 1px at 75.8% 79.5%, rgba(255, 255, 255, 0.57), transparent 100%),
    radial-gradient(ellipse 50% 30% at 82% 15%, rgba(120, 140, 220, 0.25), transparent 60%),
    linear-gradient(180deg, #011141 0%, #031853 15%, #0a2466 35%, #102c75 55%, #082155 75%, #01123c 100%);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 22px;
  padding: 90px 24px 40px;
  overflow-y: auto;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.nav-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.nav-overlay a {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--ink-bright);
  text-decoration: none;
}

.nav-overlay .nav-secondary {
  display: flex;
  gap: 28px;
  margin-top: 8px;
}

.nav-overlay .nav-secondary a {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink-dim);
}

@media (max-width: 620px) {
  .trail-nav {
    display: none;
  }

  .nav-toggle,
  .nav-overlay {
    display: flex;
  }
}

/* ---------- Typography ---------- */
.eyebrow {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 14px;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  text-wrap: balance;
  margin: 0;
  color: var(--ink-bright);
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.08;
  font-weight: 700;
  text-shadow: 0 4px 30px rgba(0, 0, 0, 0.35);
}

h2 {
  font-size: 19px;
  font-weight: 700;
  margin: 36px 0 12px;
}

h3 {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 6px;
}

.lede {
  font-size: clamp(1rem, 1.4vw, 1.1rem);
  color: var(--ink-dim);
  max-width: 640px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease;
  flex-shrink: 0;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
  box-shadow: 0 12px 30px var(--accent-glow);
}

/* ---------- Page intro ---------- */
.page-hero {
  position: relative;
  z-index: 1;
  padding-top: clamp(120px, 18vh, 170px);
  padding-bottom: 8px;
}

.page-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.updated {
  color: var(--ink-faint);
  font-size: 13px;
  margin: 10px 0 0;
}

/* ---------- Content card ---------- */
.doc {
  position: relative;
  z-index: 1;
  padding-top: 40px;
  padding-bottom: 100px;
}

.card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.28);
  padding: clamp(28px, 4vw, 44px);
}

.card > h2:first-child {
  margin-top: 0;
}

.card p,
.card li {
  color: var(--ink-dim);
  font-size: 15px;
  line-height: 1.7;
}

.card ul {
  padding-left: 20px;
  margin: 8px 0;
}

.card a {
  color: var(--accent);
}

.faq-item + .faq-item {
  margin-top: 28px;
}

.faq-item p {
  margin: 0;
}

/* ---------- Footer ---------- */
footer {
  position: relative;
  z-index: 1;
  padding: 32px 0 44px;
}

.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12px;
  color: var(--ink-faint);
}

.footer-links {
  display: flex;
  gap: 20px;
}

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

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