:root {
  --guide-bg: linear-gradient(160deg, #0a1628 0%, #05080c 45%, #0d2137 100%);
  --guide-surface: rgba(0, 0, 0, 0.55);
  --guide-border: rgba(0, 195, 255, 0.35);
  --guide-accent: #00c3ff;
  --guide-text: #ddeaf7;
  --guide-muted: #b0c4ff;
  --guide-radius: 12px;
  --guide-header-h: 56px;
  --guide-drawer-w: 280px;
}

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

body.guide-page {
  margin: 0;
  min-height: 100vh;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  color: var(--guide-text);
  background: var(--guide-bg) fixed;
  background-size: cover;
}

.guide-overlay {
  position: fixed;
  inset: 0;
  z-index: 30;
  background: rgba(0, 0, 0, 0.45);
}

.guide-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: var(--guide-header-h);
  padding: 8px 16px;
  background: rgba(0, 0, 0, 0.72);
  border-bottom: 1px solid var(--guide-border);
  backdrop-filter: blur(10px);
}

.guide-burger {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--guide-border);
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.5);
  cursor: pointer;
}

.guide-burger__bar {
  display: block;
  width: 20px;
  height: 2px;
  margin: 0 auto;
  background: var(--guide-accent);
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

body.guide-menu-open .guide-burger__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

body.guide-menu-open .guide-burger__bar:nth-child(2) {
  opacity: 0;
}

body.guide-menu-open .guide-burger__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.guide-brand {
  flex: 1;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--guide-accent);
  text-decoration: none;
  font-size: 0.95rem;
}

.guide-register {
  padding: 6px 14px;
  border: 1px solid var(--guide-border);
  border-radius: 8px;
  color: var(--guide-accent);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  white-space: nowrap;
}

.guide-register:hover {
  background: rgba(0, 195, 255, 0.12);
}

.guide-lang {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.guide-lang__link {
  padding: 6px 10px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 8px;
  color: var(--guide-muted);
  text-decoration: none;
  font-size: 0.85rem;
}

.guide-lang__link--active {
  color: var(--guide-accent);
  border-color: var(--guide-border);
  background: rgba(0, 195, 255, 0.12);
}

.guide-layout {
  display: block;
  min-height: calc(100vh - var(--guide-header-h));
}

.guide-drawer {
  position: fixed;
  top: var(--guide-header-h);
  left: 0;
  bottom: 0;
  z-index: 35;
  width: min(var(--guide-drawer-w), 88vw);
  max-height: none;
  overflow-y: auto;
  padding: 16px 12px 24px;
  background: rgba(0, 0, 0, 0.92);
  border-right: 1px solid var(--guide-border);
  transform: translateX(-105%);
  transition: transform 0.22s ease;
  box-shadow: 8px 0 32px rgba(0, 0, 0, 0.45);
}

.guide-drawer--open {
  transform: translateX(0);
}

body.guide-menu-open {
  overflow: hidden;
}

.guide-nav__section {
  margin: 0 0 8px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--guide-muted);
}

.guide-site-nav {
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.guide-site-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.guide-site-nav__link {
  display: block;
  padding: 8px 10px;
  margin-bottom: 4px;
  border-radius: 8px;
  color: var(--guide-muted);
  text-decoration: none;
  font-size: 0.92rem;
}

.guide-site-nav__link:hover {
  color: var(--guide-accent);
  background: rgba(0, 195, 255, 0.1);
}

.guide-site-nav__link--active {
  color: var(--guide-accent);
  background: rgba(0, 195, 255, 0.15);
  border: 1px solid rgba(0, 195, 255, 0.25);
}

.guide-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.guide-nav__link {
  display: block;
  padding: 8px 10px;
  margin-bottom: 4px;
  border-radius: 8px;
  color: var(--guide-text);
  text-decoration: none;
  font-size: 0.92rem;
  line-height: 1.35;
}

.guide-nav__link:hover {
  background: rgba(0, 195, 255, 0.1);
}

.guide-nav__link--active {
  color: var(--guide-accent);
  background: rgba(0, 195, 255, 0.15);
  border: 1px solid rgba(0, 195, 255, 0.25);
}

.guide-main {
  padding: 24px 20px 48px;
}

.guide-content {
  max-width: 52rem;
  margin: 0 auto;
  padding: 24px 28px;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--guide-border);
  border-radius: var(--guide-radius);
  line-height: 1.65;
}

.guide-content h1 {
  margin: 0 0 12px;
  color: var(--guide-accent);
  font-size: 1.75rem;
  line-height: 1.25;
}

.guide-content h2 {
  margin: 1.75rem 0 0.75rem;
  color: var(--guide-accent);
  font-size: 1.25rem;
}

.guide-content h3 {
  margin: 1.25rem 0 0.5rem;
  font-size: 1.05rem;
}

.guide-content p {
  margin: 0 0 1rem;
}

.guide-content ul,
.guide-content ol {
  margin: 0 0 1rem;
  padding-left: 1.4rem;
}

.guide-content li {
  margin-bottom: 0.35rem;
}

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

.guide-lead {
  font-size: 1.05rem;
  color: var(--guide-muted);
}

.guide-back {
  margin: 0 0 1.25rem;
  font-size: 0.9rem;
}

.guide-fallback-notice {
  margin: 0 0 1rem;
  padding: 10px 14px;
  border-radius: 8px;
  background: rgba(255, 180, 60, 0.15);
  border: 1px solid rgba(255, 180, 60, 0.35);
  color: #ffd89a;
  font-size: 0.9rem;
}

.guide-card-grid {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.guide-card a {
  display: block;
  padding: 16px 18px;
  border-radius: var(--guide-radius);
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(0, 0, 0, 0.25);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.guide-card a:hover {
  border-color: var(--guide-border);
  background: rgba(0, 195, 255, 0.08);
}

.guide-card h2 {
  margin: 0 0 6px;
  font-size: 1.1rem;
  color: var(--guide-accent);
}

.guide-card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--guide-muted);
}

.guide-card__badge {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 6px;
  font-size: 0.65rem;
  vertical-align: middle;
  border-radius: 4px;
  background: rgba(255, 180, 60, 0.2);
  color: #ffd89a;
}

/* Illustrations — transparent PNG/WebP, alternating float */
.guide-content img {
  max-width: min(220px, 42%);
  height: auto;
  margin: 0 0 1rem;
  filter: drop-shadow(0 8px 24px rgba(0, 0, 0, 0.45));
}

.guide-content img:nth-of-type(odd) {
  float: left;
  margin: 0.25rem 1.25rem 1rem 0;
}

.guide-content img:nth-of-type(even) {
  float: right;
  margin: 0.25rem 0 1rem 1.25rem;
}

.guide-content::after {
  content: '';
  display: table;
  clear: both;
}

@media (max-width: 900px) {
  .guide-content {
    padding: 18px 16px;
  }

  .guide-content img {
    float: none !important;
    display: block;
    max-width: min(240px, 80%);
    margin: 0 auto 1rem;
  }
}