/* ═══════════════════════════════════════════════════════════════
   rdbl MISSION CONTROL — 1960s NASA Documentation Theme
   Base: 1rem = 17px (set on html)
   ═══════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Space+Mono:ital,wght@0,400;0,700;1,400&display=swap');

:root {
  --bg:          #080b08;
  --bg2:         #0d110d;
  --bg3:         #111611;
  --bg4:         #161c16;
  --amber:       #ffb000;
  --amber-dim:   #cc8800;
  --amber-dark:  #7a5000;
  --green:       #33ff66;
  --green-dim:   #22bb44;
  --green-dark:  #0a3318;
  --cream:       #f0e4c0;
  --text:        #e9e7e0;
  --text-dim:    #cac5bc;
  --border:      #1e281e;
  --border2:     #2a3c2a;
  --red:         #ff4455;
  --red-dim:     #992233;
  --blue:        #44aaff;

  --glow-amber:  0 0 10px rgba(255, 176, 0, 0.4), 0 0 30px rgba(255, 176, 0, 0.1);
  --glow-green:  0 0 10px rgba(51, 255, 102, 0.3), 0 0 30px rgba(51, 255, 102, 0.08);
  --glow-red:    0 0 10px rgba(255, 68, 85, 0.4);

  --font:        'Space Mono', 'Courier New', Courier, monospace;
  --sidebar-w:   260px;
  --header-h:    56px;

  /* Glass */
  --glass-header:  rgba(8, 11, 8, 0.72);
  --glass-sidebar: rgba(10, 14, 10, 0.80);
  --glass-panel:   rgba(13, 17, 13, 0.60);
  --glass-deep:    rgba(10, 14, 10, 0.75);
  --glass-border:  rgba(42, 60, 42, 0.35);
  --glass-blur:    blur(18px) saturate(160%);
  --glass-blur-sm: blur(10px) saturate(140%);
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  font-size: 17px;
  scroll-behavior: smooth;
}

/* ── Base ── */
body {
  background:
    radial-gradient(ellipse 60% 40% at 15% 10%,  rgba(255, 176,   0, 0.055) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at 85% 80%,  rgba( 51, 255, 102, 0.040) 0%, transparent 60%),
    radial-gradient(ellipse 40% 60% at 80% 10%,  rgba( 68, 170, 255, 0.025) 0%, transparent 55%),
    radial-gradient(ellipse 70% 40% at 30% 90%,  rgba(255, 176,   0, 0.020) 0%, transparent 50%),
    var(--bg);
  background-attachment: fixed;
  color: var(--text);
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

/* CRT scanline overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 3px,
    rgba(0, 0, 0, 0.02) 3px,
    rgba(0, 0, 0, 0.02) 4px
  );
  pointer-events: none;
  z-index: 9999;
}

/* Subtle vignette */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 60%, rgba(0,0,0,0.4) 100%);
  pointer-events: none;
  z-index: 9998;
}

/* ── Animations ── */
@keyframes blink    { 0%, 100% { opacity: 1 } 50% { opacity: 0 } }
@keyframes glow-pulse {
  0%, 100% { text-shadow: var(--glow-amber) }
  50%      { text-shadow: 0 0 20px rgba(255, 176, 0, 0.7), 0 0 50px rgba(255, 176, 0, 0.2) }
}
@keyframes slide-in {
  from { opacity: 0; transform: translateY(-8px) }
  to   { opacity: 1; transform: translateY(0) }
}
@keyframes scan {
  0%   { background-position: 0 0 }
  100% { background-position: 0 100% }
}
@keyframes boot-flash {
  0%   { opacity: 0 }
  10%  { opacity: 1 }
  90%  { opacity: 1 }
  100% { opacity: 0 }
}

/* ── Header ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  height: var(--header-h);
  background: var(--glass-header);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  gap: 16px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-patch {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  color: var(--amber);
  font-weight: 700;
  box-shadow: var(--glow-amber);
  flex-shrink: 0;
}

.logo-text {
  color: var(--amber);
  font-size: 1.06rem;
  font-weight: 700;
  letter-spacing: 6px;
  text-transform: uppercase;
  text-shadow: var(--glow-amber);
}

.logo-sub {
  color: var(--text-dim);
  letter-spacing: 3px;
  text-transform: uppercase;
  display: block;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav a {
  color: var(--text-dim);
  text-decoration: none;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 6px 12px;
  border: 1px solid transparent;
  transition: all 0.15s;
  white-space: nowrap;
}
.site-nav a:hover,
.site-nav a.active {
  color: var(--amber);
  border-color: var(--amber-dark);
  text-shadow: var(--glow-amber);
}

.header-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.59rem;
  color: var(--text-dim);
  letter-spacing: 2px;
  text-transform: uppercase;
  flex-shrink: 0;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: var(--glow-green);
  animation: blink 2.5s ease-in-out infinite;
}

#mission-clock {
  color: var(--green);
  font-size: 0.65rem;
  letter-spacing: 2px;
  text-shadow: var(--glow-green);
}

/* ── Layout ── */
.page-layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  min-height: calc(100vh - var(--header-h));
}

/* ── Sidebar ── */
.sidebar {
  background: var(--glass-sidebar);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-right: 1px solid var(--glass-border);
  position: sticky;
  top: var(--header-h);
  height: calc(100vh - var(--header-h));
  overflow-y: auto;
  padding: 24px 0 40px;
  scrollbar-width: thin;
  scrollbar-color: var(--border2) transparent;
}

.sidebar-section-label {
  color: var(--text-dim);
  letter-spacing: 4px;
  text-transform: uppercase;
  padding: 16px 20px 6px;
  border-top: 1px solid var(--border);
  margin-top: 8px;
}
.sidebar-section-label:first-child { border-top: none; margin-top: 0; }

.sidebar a {
  display: block;
  color: var(--text);
  text-decoration: none;
  padding: 7px 20px;
  border-left: 2px solid transparent;
  transition: all 0.15s;
  letter-spacing: 0.5px;
}
.sidebar a:hover { color: var(--cream); border-left-color: var(--text-dim); }
.sidebar a.active { color: var(--amber); border-left-color: var(--amber); text-shadow: 0 0 6px rgba(255,176,0,0.3); }

.sidebar-sub {
  padding-left: 36px !important;
  color: var(--text-dim) !important;
}
.sidebar-sub:hover { color: var(--text) !important; }
.sidebar-sub.active { color: var(--amber) !important; }

/* ── Main content ── */
.main-content {
  padding: 40px 56px 80px;
  max-width: 900px;
}

/* ── Footer ── */
.site-footer {
  grid-column: 1 / -1;
  background: var(--glass-header);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-top: 1px solid var(--glass-border);
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.59rem;
  color: var(--text-dim);
  letter-spacing: 2px;
  text-transform: uppercase;
}
.footer-status { color: var(--green); text-shadow: var(--glow-green); }

/* ── Typography ── */
h1 {
  color: var(--amber);
  font-size: 1.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 6px;
  text-shadow: var(--glow-amber);
  line-height: 1.2;
  margin-bottom: 8px;
}
h2 {
  color: var(--amber);
  font-size: 0.94rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 4px;
  margin: 48px 0 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border2);
}
h2::before {
  content: '▸ ';
  color: var(--amber-dim);
}
h3 {
  color: var(--cream);
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 3px;
  margin: 28px 0 12px;
}
h4 {
  font-size: 0.71rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin: 20px 0 8px;
  color: var(--green-dim);
}

p { margin: 12px 0; }
a { color: var(--amber); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

strong { color: var(--cream); }
em { color: var(--amber-dim); font-style: normal; }

/* ── Code ── */
pre {
  background: var(--glass-deep);
  backdrop-filter: var(--glass-blur-sm);
  -webkit-backdrop-filter: var(--glass-blur-sm);
  border: 1px solid var(--glass-border);
  border-left: 3px solid var(--green-dim);
  padding: 20px 20px 20px 24px;
  overflow-x: auto;
  margin: 16px 0;
  font-family: var(--font);
  font-size: 0.76rem;
  line-height: 1.6;
  color: var(--green);
  position: relative;
}

pre .label {
  position: absolute;
  top: -1px;
  right: 16px;
  background: var(--bg3);
  color: var(--text-dim);
  font-size: 0.53rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  padding: 0 8px;
  border: 1px solid var(--border2);
  border-top: none;
}

code {
  font-family: var(--font);
  font-size: 0.71rem;
  color: var(--amber);
  background: var(--bg3);
  border: 1px solid var(--border);
  padding: 1px 6px;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

/* Syntax coloring inside pre */
pre .kw  { color: var(--amber); }
pre .str { color: var(--green); }
pre .com { color: var(--text-dim); font-style: italic; }
pre .fn  { color: var(--cream); }
pre .num { color: var(--blue); }
pre .attr { color: var(--amber); }
pre .val  { color: var(--green); }

/* ── Panels / Cards ── */
.panel {
  border: 1px solid var(--border2);
  background: var(--bg2);
  padding: 24px;
  margin: 20px 0;
  position: relative;
}

.panel-title {
  color: var(--text-dim);
  font-size: 0.53rem;
  letter-spacing: 4px;
  text-transform: uppercase;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

/* ── Live Demo box ── */
.demo-container {
  margin: 24px 0;
}

.demo-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.53rem;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--green-dim);
  margin-bottom: 0;
  padding: 4px 12px;
  background: var(--bg3);
  border: 1px solid var(--green-dark);
  border-bottom: none;
}
.demo-label::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: var(--glow-green);
  animation: blink 1.5s ease-in-out infinite;
}

.demo {
  background: var(--bg3);
  border: 1px solid var(--green-dark);
  padding: 28px;
}

/* ── Buttons ── */
button, .btn {
  background: transparent;
  border: 1px solid var(--amber-dark);
  color: var(--amber);
  font-family: var(--font);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  padding: 8px 18px;
  cursor: pointer;
  transition: all 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
button:hover, .btn:hover {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--bg);
  box-shadow: var(--glow-amber);
}
button:active { transform: translateY(1px); }

button.danger { border-color: var(--red-dim); color: var(--red); }
button.danger:hover { background: var(--red); border-color: var(--red); color: var(--bg); box-shadow: var(--glow-red); }

button.ghost { border-color: var(--border2); color: var(--text-dim); }
button.ghost:hover { border-color: var(--text-dim); color: var(--text); background: transparent; box-shadow: none; }

/* ── Form inputs ── */
input[type="text"],
input[type="search"],
input:not([type]),
textarea,
select {
  background: var(--bg3);
  border: 1px solid var(--border2);
  color: var(--green);
  font-family: var(--font);
  font-size: 0.76rem;
  padding: 9px 14px;
  outline: none;
  width: 100%;
  transition: border-color 0.15s, box-shadow 0.15s;
  -webkit-appearance: none;
}
input[type="text"]:focus,
input[type="search"]:focus,
input:not([type]):focus,
textarea:focus,
select:focus {
  border-color: var(--green-dim);
  box-shadow: 0 0 0 1px var(--green-dark), var(--glow-green);
}

input::placeholder { color: var(--text-dim); }

input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--amber);
  cursor: pointer;
  flex-shrink: 0;
}

/* ── Tables ── */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.76rem;
  margin: 16px 0;
}
th {
  text-align: left;
  color: var(--text-dim);
  font-size: 0.53rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border2);
}
td {
  padding: 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
td:first-child { color: var(--amber); white-space: nowrap; }
tr:hover td { background: var(--bg2); }

/* ── Hero ── */
.hero {
  padding: 40px 0 44px;
  border-bottom: 1px solid var(--border2);
  margin-bottom: 40px;
  position: relative;
  overflow: hidden;
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.4;
  pointer-events: none;
}

.hero-eyebrow {
  color: var(--text-dim);
  font-size: 0.59rem;
  letter-spacing: 5px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.hero h1 { font-size: 2.82rem; letter-spacing: 10px; animation: glow-pulse 4s ease-in-out infinite; }

.hero-tagline {
  color: var(--green);
  font-size: 0.88rem;
  letter-spacing: 1px;
  margin: 16px 0 20px;
  text-shadow: var(--glow-green);
  line-height: 1.5;
}

.hero-desc {
  color: var(--cream);
  max-width: 540px;
  line-height: 1.9;
  font-size: 0.82rem;
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.btn-primary {
  background: var(--amber);
  border-color: var(--amber);
  color: var(--bg);
  font-size: 0.71rem;
  padding: 10px 24px;
  box-shadow: var(--glow-amber);
}
.btn-primary:hover {
  background: var(--cream);
  border-color: var(--cream);
  box-shadow: 0 0 20px rgba(232, 213, 163, 0.4);
}

.hero-stats {
  display: flex;
  gap: 32px;
  font-size: 0.65rem;
  color: var(--text-dim);
  letter-spacing: 2px;
}
.hero-stat-value {
  color: var(--green);
  font-size: 0.82rem;
  font-weight: 700;
  display: block;
  text-shadow: var(--glow-green);
}

/* ── Install box ── */
.install-box {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg3);
  border: 1px solid var(--border2);
  padding: 12px 20px;
  margin: 20px 0;
  max-width: 420px;
}
.install-prompt {
  color: var(--green-dim);
  user-select: none;
}
.install-cmd {
  color: var(--green);
  font-size: 0.82rem;
  flex: 1;
  cursor: text;
}

/* ── Principles grid ── */
.principles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  margin: 24px 0;
}
.principle {
  background: var(--bg2);
  padding: 20px;
}
.principle-num {
  color: var(--amber-dim);
  font-size: 1.41rem;
  font-weight: 700;
  letter-spacing: 2px;
  display: block;
  margin-bottom: 8px;
}
.principle-title {
  color: var(--cream);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  display: block;
  margin-bottom: 6px;
}
.principle-desc {
  color: var(--text);
  font-size: 0.71rem;
  line-height: 1.6;
}

/* ── Directive ref table ── */
.directive-ref td:first-child {
  color: var(--green);
  font-size: 0.71rem;
}

/* ── Tabs (for demo/code toggle) ── */
.tab-group {
  margin: 24px 0;
}
.tab-bar {
  display: flex;
  border-bottom: 1px solid var(--border2);
  margin-bottom: 0;
}
.tab-btn {
  padding: 8px 20px;
  font-size: 0.59rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--text-dim);
  border: none;
  border-bottom: 2px solid transparent;
  background: transparent;
  cursor: pointer;
  transition: all 0.15s;
  box-shadow: none;
}
.tab-btn:hover { background: transparent; color: var(--text); border-bottom-color: var(--text-dim); box-shadow: none; }
.tab-btn.active { color: var(--amber); border-bottom-color: var(--amber); }

.tab-pane { display: none; }
.tab-pane.active { display: block; }

/* ── App examples ── */
.app-frame {
  background: var(--bg3);
  border: 1px solid var(--border2);
  padding: 28px;
  margin: 20px 0;
}

.app-header {
  color: var(--amber);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 4px;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border2);
  padding-bottom: 12px;
  margin-bottom: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Todo app styles */
.todo-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 20px;
}
.todo-tab {
  padding: 7px 16px;
  font-size: 0.59rem;
  letter-spacing: 3px;
  border: 1px solid var(--border2);
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.15s;
  background: transparent;
  box-shadow: none;
  text-transform: uppercase;
}
.todo-tab:hover { color: var(--text); border-color: var(--text-dim); background: transparent; box-shadow: none; }
.todo-tab.tab-active { color: var(--amber); border-color: var(--amber-dark); background: rgba(255,176,0,0.06); }

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  font-size: 0.59rem;
  background: var(--bg);
  border: 1px solid var(--border2);
  color: var(--text-dim);
  margin-left: 6px;
}
.badge.amber { background: var(--amber-dark); border-color: var(--amber-dim); color: var(--amber); }

.todo-input-row {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}
.todo-input-row input { flex: 1; }

.todo-list { list-style: none; }
.todo-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid var(--border);
  animation: slide-in 0.2s ease;
}
.todo-item:last-child { border-bottom: none; }

.todo-text {
  flex: 1;
  font-size: 0.76rem;
  color: var(--text);
}
.todo-text.done {
  color: var(--text-dim);
  text-decoration: line-through;
  text-decoration-color: var(--text-dim);
}

.todo-actions { display: flex; gap: 6px; }
.todo-actions button { padding: 4px 10px; font-size: 0.59rem; letter-spacing: 1px; }

.todo-summary {
  margin-top: 16px;
  font-size: 0.65rem;
  letter-spacing: 2px;
  color: var(--text-dim);
  text-transform: uppercase;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}

.todo-empty {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.65rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  padding: 32px;
}

/* Search example */
.search-bar {
  margin-bottom: 16px;
}
.mission-list { list-style: none; }
.mission-item {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 16px;
  padding: 12px;
  border-bottom: 1px solid var(--border);
  animation: slide-in 0.15s ease;
}
.mission-name { color: var(--cream); font-size: 0.76rem; }
.mission-year { color: var(--text-dim); font-size: 0.65rem; }
.mission-status {
  font-size: 0.53rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 3px 8px;
  border: 1px solid;
}
.status-success { color: var(--green); border-color: var(--green-dark); }
.status-failure { color: var(--red); border-color: var(--red-dim); }
.status-partial { color: var(--amber); border-color: var(--amber-dark); }

/* Counter example */
.counter-display {
  text-align: center;
  padding: 32px;
}
.counter-value {
  font-size: 4.24rem;
  font-weight: 700;
  color: var(--amber);
  text-shadow: var(--glow-amber);
  line-height: 1;
  margin-bottom: 8px;
  letter-spacing: 4px;
}
.counter-label {
  font-size: 0.59rem;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 24px;
}
.counter-readouts {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin: 24px 0;
  font-size: 0.65rem;
}
.readout-label {
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 2px;
  font-size: 0.53rem;
}
.readout-value { color: var(--green); font-size: 0.94rem; text-shadow: var(--glow-green); }
.counter-controls { display: flex; justify-content: center; gap: 12px; }
.counter-controls button {
  width: 123px;
  height: 48px;
  padding: 1rem;
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

button.left {
  border-top-left-radius: 200%;
  border-bottom-left-radius: 10%;
}

button.right {
  border-top-right-radius: 200%;
  border-bottom-right-radius: 10%;
}

/* ── Callouts ── */
.callout {
  border-left: 3px solid var(--amber-dim);
  background: rgba(255, 176, 0, 0.05);
  padding: 14px 18px;
  margin: 20px 0;
  font-size: 0.76rem;
  line-height: 1.7;
}
.callout.green {
  border-left-color: var(--green-dim);
  background: rgba(51, 255, 102, 0.04);
}
.callout strong {
  display: block;
  font-size: 0.59rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 4px;
}
.callout.green strong { color: var(--green); }

/* ── Section page intro ── */
.page-intro {
  border-bottom: 1px solid var(--border2);
  padding-bottom: 28px;
  margin-bottom: 32px;
}
.page-intro h1 { font-size: 1.76rem; margin-bottom: 12px; }
.page-intro p { color: var(--cream); font-size: 0.88rem; max-width: 600px; line-height: 1.8; }

/* ── Code tabs ── */
.code-block {
  position: relative;
  margin: 16px 0;
}
.code-block pre { margin: 0; }
.code-file {
  display: inline-block;
  background: var(--bg4);
  border: 1px solid var(--border2);
  border-bottom: none;
  color: var(--text-dim);
  font-size: 0.53rem;
  letter-spacing: 2px;
  padding: 4px 12px;
  text-transform: uppercase;
}

/* ── Hamburger button (hidden on desktop) ── */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 7px;
  background: transparent;
  border: 1px solid var(--border2);
  border-radius: 0;
  box-shadow: none;
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color 0.15s;
}
.hamburger:hover { border-color: var(--amber); background: transparent; box-shadow: none; }
.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--amber);
  transition: transform 0.2s ease, opacity 0.2s ease;
  transform-origin: center;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Sidebar overlay (mobile drawer backdrop) ── */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  z-index: 299;
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}
.sidebar-overlay.open { display: block; }

/* Prevent body scroll when drawer is open */
body.drawer-open { overflow: hidden; }

/* ── Responsive ── */
@media (max-width: 900px) {
  .main-content { padding: 28px 24px 60px; }
}

@media (max-width: 768px) {
  /* Stack layout to single column */
  .page-layout { grid-template-columns: 1fr; }

  /* Sidebar becomes a fixed left drawer */
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100dvh;
    width: min(var(--sidebar-w), 85vw);
    z-index: 300;
    transform: translateX(-100%);
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    padding-top: calc(var(--header-h) + 20px);
    /* keep sticky from desktop; override positioning */
    position: fixed;
  }
  .sidebar.open { transform: translateX(0); }

  /* Top nav links hidden — everything lives in the drawer */
  .site-nav { display: none; }
  .header-status { display: none; }

  /* Show hamburger */
  .hamburger { display: flex; }

  /* Hero */
  .hero h1 { font-size: 1.88rem; letter-spacing: 5px; }
  .hero-stats { flex-wrap: wrap; gap: 16px; }
  .hero-desc { font-size: 0.76rem; }

  /* Main content full width */
  .main-content { max-width: 100%; }

  /* Principles grid single column */
  .principles { grid-template-columns: 1fr; }

  /* Footer stack */
  .site-footer { flex-direction: column; gap: 6px; text-align: center; }
}

/* ── Utility ── */
.amber { color: var(--amber) !important; }
.green { color: var(--green) !important; }
.red   { color: var(--red)   !important; }
.dim   { color: var(--text-dim) !important; }
.blink { animation: blink 1s step-end infinite; }
.mt0   { margin-top: 0 !important; }
.mb0   { margin-bottom: 0 !important; }
.flex  { display: flex; }
.gap8  { gap: 8px; }
.gap16 { gap: 16px; }
.items-center { align-items: center; }