/* ── Reset & Base ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #03050a;
  --surface:   #080d18;
  --surface2:  #0d1525;
  --border:    #18253a;
  --green:     #00e855;
  --blue:      #2a90ff;
  --red:       #ff2244;
  --orange:    #ff8c00;
  --purple:    #b040e0;
  --yellow:    #ffd600;
  --cyan:      #00dcd8;
  --text:      #c8d8ee;
  --dim:       #4a5e78;
  --sidebar-w: 260px;
  --header-h:  52px;
  --font-mono: 'Share Tech Mono', monospace;
  --font-orb:  'Orbitron', monospace;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.7;
  display: flex;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── Scanlines overlay ────────────────────────────────────────────────────── */
.scanlines {
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg, transparent, transparent 2px,
    rgba(0,0,0,0.06) 2px, rgba(0,0,0,0.06) 4px
  );
  pointer-events: none;
  z-index: 9999;
}

/* ── Scrollbar ────────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: #0a1525; border: 1px solid var(--blue); }
::-webkit-scrollbar-thumb:hover { background: var(--blue); }

/* ── Sidebar ──────────────────────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  min-height: 100vh;
  background: rgba(3,5,10,0.97);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 200;
  overflow-y: auto;
  transition: transform 0.25s ease;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 20px 16px 10px;
  border-bottom: 1px solid var(--border);
}

.logo-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 8px var(--blue);
  animation: pulse 2s ease-in-out infinite;
  flex-shrink: 0;
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 6px var(--blue); }
  50%       { opacity: 0.5; box-shadow: 0 0 14px var(--blue); }
}

.logo-text {
  font-family: var(--font-orb);
  font-weight: 900;
  font-size: 13px;
  letter-spacing: 3px;
  color: var(--blue);
  text-shadow: 0 0 10px rgba(42,144,255,0.4);
}

.logo-sub {
  color: var(--dim);
  font-weight: 400;
  margin-left: 5px;
}

.sidebar-version {
  font-size: 10px;
  color: var(--dim);
  letter-spacing: 2px;
  padding: 6px 16px 14px;
  border-bottom: 1px solid var(--border);
}

.nav-list {
  list-style: none;
  padding: 12px 0;
  flex: 1;
}

.nav-section {
  font-size: 9px;
  letter-spacing: 3px;
  color: var(--dim);
  padding: 14px 16px 5px;
  text-transform: uppercase;
}

.nav-link {
  display: block;
  padding: 7px 16px;
  color: var(--dim);
  text-decoration: none;
  font-size: 12px;
  letter-spacing: 1px;
  border-left: 2px solid transparent;
  transition: all 0.15s;
}

.nav-link:hover {
  color: var(--text);
  border-left-color: var(--border);
  background: rgba(255,255,255,0.02);
}

.nav-link.active {
  color: var(--blue);
  border-left-color: var(--blue);
  background: rgba(42,144,255,0.05);
  text-shadow: 0 0 6px rgba(42,144,255,0.3);
}

/* ── Main content ─────────────────────────────────────────────────────────── */
.content {
  margin-left: var(--sidebar-w);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.page-header {
  position: sticky;
  top: 0;
  height: var(--header-h);
  background: rgba(3,5,10,0.97);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0 28px;
  gap: 16px;
}

.menu-btn {
  background: none;
  border: none;
  color: var(--dim);
  font-size: 20px;
  cursor: pointer;
  display: none;
  padding: 4px 8px;
}

.breadcrumb {
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--dim);
  text-transform: uppercase;
  flex: 1;
}

.header-right { display: flex; gap: 8px; }

.doc-body {
  flex: 1;
  padding: 40px 48px;
  max-width: 900px;
}

/* ── Sections ─────────────────────────────────────────────────────────────── */
.doc-section { display: none; animation: fadeIn 0.2s ease; }
.doc-section.active { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.section-label {
  font-size: 9px;
  letter-spacing: 4px;
  color: var(--dim);
  text-transform: uppercase;
  margin-bottom: 8px;
}

h1 {
  font-family: var(--font-orb);
  font-size: 26px;
  font-weight: 900;
  color: var(--text);
  letter-spacing: 3px;
  margin-bottom: 16px;
  text-transform: uppercase;
}

h2 {
  font-family: var(--font-orb);
  font-size: 13px;
  font-weight: 700;
  color: var(--dim);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin: 32px 0 12px;
}

p { margin-bottom: 14px; }

.lead {
  font-size: 15px;
  color: var(--text);
  line-height: 1.8;
  margin-bottom: 28px;
}

/* ── Cards ────────────────────────────────────────────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 14px;
  margin: 24px 0;
}

.info-card {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 18px 16px;
  transition: all 0.2s;
}

.info-card:hover { transform: translateY(-2px); }

.info-card.accent-blue  { border-top: 2px solid var(--blue); }
.info-card.accent-green { border-top: 2px solid var(--green); }
.info-card.accent-orange{ border-top: 2px solid var(--orange); }
.info-card.accent-purple{ border-top: 2px solid var(--purple); }

.card-icon { font-size: 24px; margin-bottom: 8px; }

.card-title {
  font-family: var(--font-orb);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--text);
  margin-bottom: 6px;
}

.card-desc { font-size: 11px; color: var(--dim); line-height: 1.6; }

/* ── Tech badges ──────────────────────────────────────────────────────────── */
.tech-row { display: flex; gap: 8px; flex-wrap: wrap; margin: 12px 0 24px; }

.tech-badge {
  padding: 4px 12px;
  font-size: 11px;
  letter-spacing: 2px;
  border: 1px solid;
}

.tech-badge.blue   { color: var(--blue);   border-color: var(--blue);   background: rgba(42,144,255,0.08); }
.tech-badge.pink   { color: #ff4dab;       border-color: #ff4dab;       background: rgba(255,77,171,0.08); }
.tech-badge.orange { color: var(--orange); border-color: var(--orange); background: rgba(255,140,0,0.08); }
.tech-badge.green  { color: var(--blue);  border-color: var(--blue);  background: rgba(0,232,85,0.08); }

/* ── Callouts ─────────────────────────────────────────────────────────────── */
.callout {
  padding: 14px 18px;
  border-left: 3px solid;
  margin: 20px 0;
  font-size: 13px;
  line-height: 1.7;
}

.callout-info { border-color: var(--blue);   background: rgba(42,144,255,0.06); }
.callout-warn { border-color: var(--yellow);  background: rgba(255,214,0,0.05); }
.callout-warn strong { color: var(--yellow); }
.callout-info strong { color: var(--blue); }

/* ── Tables ───────────────────────────────────────────────────────────────── */
.doc-table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0 24px;
  font-size: 13px;
}

.doc-table th {
  background: var(--surface2);
  color: var(--dim);
  font-size: 9px;
  letter-spacing: 2px;
  text-transform: uppercase;
  text-align: left;
  padding: 9px 12px;
  border-bottom: 1px solid var(--border);
}

.doc-table td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  vertical-align: top;
}

.doc-table tr:hover td { background: rgba(255,255,255,0.02); }

/* ── Code ─────────────────────────────────────────────────────────────────── */
.code {
  background: var(--surface2);
  border: 1px solid var(--border);
  padding: 1px 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
}

.code-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--blue);
  padding: 16px 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--blue);
  line-height: 1.8;
  white-space: pre;
  overflow-x: auto;
  margin: 14px 0;
}

/* ── Lists ────────────────────────────────────────────────────────────────── */
.doc-list {
  margin: 10px 0 18px 20px;
  line-height: 1.9;
}

.doc-list.numbered { list-style: decimal; }
.doc-list li { margin-bottom: 4px; }
.doc-list strong { color: var(--text); }

/* ── Badges ───────────────────────────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 2px 8px;
  font-size: 10px;
  letter-spacing: 1px;
  border: 1px solid var(--border);
  color: var(--dim);
  background: var(--surface2);
}

.badge.yellow { color: var(--yellow); border-color: rgba(255,214,0,0.4); background: rgba(255,214,0,0.06); }
.badge.blue   { color: var(--blue);   border-color: rgba(42,144,255,0.4); background: rgba(42,144,255,0.06); }
.badge.red    { color: var(--red);    border-color: rgba(255,34,68,0.4);  background: rgba(255,34,68,0.06); }

/* ── Keys ─────────────────────────────────────────────────────────────────── */
.key {
  display: inline-block;
  padding: 2px 8px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-bottom: 2px solid var(--border);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text);
  border-radius: 3px;
}

/* ── Game header ──────────────────────────────────────────────────────────── */
.game-header { margin-bottom: 20px; }

.game-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding: 12px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.meta-item { font-size: 12px; color: var(--dim); }
.meta-label { color: var(--text); margin-right: 4px; }

/* ── Mechanic grid ────────────────────────────────────────────────────────── */
.mechanic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
  margin: 14px 0 24px;
}

.mechanic {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 16px;
}

.mechanic-title {
  font-family: var(--font-orb);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--blue);
  margin-bottom: 8px;
}

.mechanic p { font-size: 12px; color: var(--dim); margin: 0; line-height: 1.6; }

/* ── Mission badges ───────────────────────────────────────────────────────── */
.mission-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 24px;
}

.mission-badge {
  padding: 5px 14px;
  font-size: 11px;
  letter-spacing: 1px;
  border: 1px solid;
}

.mission-badge.earth  { color: var(--blue);   border-color: rgba(42,144,255,0.4);  background: rgba(42,144,255,0.08); }
.mission-badge.moon   { color: var(--yellow);  border-color: rgba(255,214,0,0.4);   background: rgba(255,214,0,0.06); }
.mission-badge.mars   { color: var(--red);     border-color: rgba(255,34,68,0.4);   background: rgba(255,34,68,0.06); }
.mission-badge.deep   { color: var(--purple);  border-color: rgba(176,64,224,0.4);  background: rgba(176,64,224,0.06); }

/* ── Accent colours ───────────────────────────────────────────────────────── */
.accent-red    { color: var(--red); }
.accent-blue   { color: var(--blue); }
.accent-green  { color: var(--blue); }
.accent-orange { color: var(--orange); }
.accent-purple { color: var(--purple); }

/* ── Trouble items ────────────────────────────────────────────────────────── */
.trouble-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--red);
  padding: 18px 20px;
  margin-bottom: 18px;
}

.trouble-title {
  font-family: var(--font-orb);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--red);
  margin-bottom: 10px;
  text-transform: uppercase;
}

/* ── Responsive ───────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .content {
    margin-left: 0;
  }
  .menu-btn {
    display: block;
  }
  .doc-body {
    padding: 24px 20px;
  }
}