/* ============================================================
   Agentic Software Engineering — Complete Course
   Visual language: Nocturnal Logic (TokenOwl design system)
   ============================================================ */

:root {
  /* color */
  --bg: #131313;
  --surface: #1c1b1b;
  --surface-1: #201f1f;
  --surface-2: #2a2a2a;
  --surface-3: #353534;
  --border: #333333;
  --border-soft: #2a2a2a;

  --gold: #FFC107;
  --gold-dim: #ffe4af;
  --gold-deep: #3f2e00;

  --teal: #03c6b2;
  --teal-bright: #44e2cd;

  --red: #ffb4ab;
  --red-deep: #93000a;

  --text: #e5e2e1;
  --text-dim: #d4c5ab;
  --text-mute: #9c8f78;
  --text-white: #ffffff;

  /* type scale (1920x1080) */
  --type-display: 96px;
  --type-title: 64px;
  --type-h2: 48px;
  --type-h3: 36px;
  --type-subtitle: 32px;
  --type-body: 28px;
  --type-body-sm: 24px;
  --type-small: 24px;
  --type-caps: 24px;
  --type-code: 22px;
  --type-code-sm: 20px;

  /* spacing */
  --pad-x: 96px;
  --pad-y: 80px;
  --gap-title: 40px;
  --gap-item: 24px;

  /* fonts */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;
  --tracking-caps: 0.12em;
  --tracking-tight: -0.02em;
  --tracking-snug: -0.01em;
}

/* ------------------------------------------------------------
   Base
   ------------------------------------------------------------ */
* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: #000;
  font-family: var(--font-sans);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  font-feature-settings: 'cv11', 'ss03', 'ss04';
}

deck-stage > section {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 24px;
  overflow: hidden;
  position: relative;
}

.mono { font-family: var(--font-mono); }

.gold { color: var(--gold); }
.gold-dim { color: var(--gold-dim); }
.teal { color: var(--teal); }
.teal-b { color: var(--teal-bright); }
.red { color: var(--red); }
.dim { color: var(--text-dim); }
.mute { color: var(--text-mute); }
.white { color: var(--text-white); }

/* ------------------------------------------------------------
   Slide chrome
   ------------------------------------------------------------ */
.slide {
  width: 100%; height: 100%;
  padding: 56px var(--pad-x) 84px var(--pad-x);
  display: flex; flex-direction: column;
  position: relative;
}

.slide-meta {
  position: absolute;
  top: 36px; left: var(--pad-x); right: var(--pad-x);
  display: flex; justify-content: space-between;
  align-items: center;
  font-family: var(--font-sans);
  font-size: 24px;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--text-mute);
  font-weight: 600;
}
.slide-meta .gold { color: var(--gold); }

.slide-foot {
  position: absolute;
  bottom: 28px; left: var(--pad-x); right: var(--pad-x);
  display: flex; justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 24px;
  color: var(--text-mute);
}

.slide-body {
  margin-top: 40px;
  flex: 1;
  display: flex; flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

h1.slide-title {
  font-size: var(--type-title);
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  line-height: 1.05;
  margin: 0 0 28px 0;
  color: var(--text-white);
}

.slide-lede {
  font-size: var(--type-subtitle);
  font-weight: 400;
  line-height: 1.3;
  color: var(--text-dim);
  letter-spacing: var(--tracking-snug);
  margin: 0 0 32px 0;
  max-width: 1500px;
}

.label-caps {
  font-family: var(--font-sans);
  font-size: var(--type-caps);
  font-weight: 700;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--text-mute);
}

.label-caps.gold { color: var(--gold); }
.label-caps.teal { color: var(--teal); }
.label-caps.red  { color: var(--red); }

/* ------------------------------------------------------------
   Cards / panels
   ------------------------------------------------------------ */
.card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 32px;
}
.card.tight { padding: 20px; }
.card-h {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-white);
  margin: 0 0 12px 0;
  letter-spacing: var(--tracking-snug);
}
.card-num {
  font-family: var(--font-mono);
  font-size: 24px;
  color: var(--gold);
  font-weight: 600;
}
.card-kick {
  font-size: var(--type-body-sm);
  color: var(--text-dim);
  line-height: 1.45;
  font-weight: 400;
}
.card-foot {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 24px;
  color: var(--text-mute);
  font-style: normal;
}

.kicker {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 24px;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  font-weight: 700;
  color: var(--text-dim);
}
.kicker.gold { color: var(--gold); border-color: rgba(255,193,7,0.4); }
.kicker.teal { color: var(--teal); border-color: rgba(3,198,178,0.4); }
.kicker.red  { color: var(--red);  border-color: rgba(255,180,171,0.4); }

/* Grids */
.grid { display: grid; gap: 24px; }
.cols-2 { grid-template-columns: 1fr 1fr; }
.cols-3 { grid-template-columns: repeat(3, 1fr); }
.cols-4 { grid-template-columns: repeat(4, 1fr); }
.cols-5 { grid-template-columns: repeat(5, 1fr); }

.row { display: flex; align-items: center; gap: 16px; }

/* Phase pipeline */
.pipeline {
  display: flex; align-items: stretch; gap: 10px;
  font-family: var(--font-mono);
  font-size: 24px;
}
.pipeline .step {
  flex: 1; padding: 10px 14px;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 4px;
  text-align: center;
  color: var(--text-dim);
  line-height: 1.2;
}
.pipeline .step.here {
  border-color: var(--gold);
  color: var(--gold);
  background: rgba(255,193,7,0.06);
}
.pipeline .step .n {
  display: block; color: var(--text-mute); font-size: 24px;
  letter-spacing: var(--tracking-caps); margin-bottom: 2px;
  font-weight: 600;
}
.pipeline.compact {
  font-size: 24px;
}
.pipeline.compact .step {
  padding: 8px 10px;
}
.pipeline.compact .step .n {
  font-size: 24px; margin-bottom: 0;
}
.pipeline .arrow {
  display: flex; align-items: center;
  color: var(--text-mute);
  font-size: 24px;
}

/* Tables */
table.deck {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--type-body-sm);
}
table.deck th {
  text-align: left;
  font-size: var(--type-caps);
  font-weight: 700;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--text-mute);
  padding: 12px 18px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
table.deck td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  vertical-align: top;
  line-height: 1.35;
}
table.deck tr:last-child td { border-bottom: none; }
table.deck td.mono { font-family: var(--font-mono); font-size: 24px; }
table.deck td.gold { color: var(--gold); font-weight: 600; }
table.deck td.num  {
  font-family: var(--font-mono); color: var(--gold);
  width: 64px; font-weight: 600;
}

/* Code block */
.code {
  background: #0e0e0e;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 1.35;
  color: var(--text-dim);
  padding: 18px 22px;
  overflow: hidden;
  white-space: pre;
}
.code .cmt { color: var(--text-mute); }
.code .kw  { color: var(--teal-bright); }
.code .str { color: #e0c98e; }
.code .gold { color: var(--gold); }
.code .red  { color: var(--red); }

/* Reflection list */
ol.reflection {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: 22px;
  counter-reset: r;
}
ol.reflection li {
  counter-increment: r;
  position: relative;
  padding-left: 88px;
  font-size: var(--type-body);
  line-height: 1.45;
  color: var(--text);
}
ol.reflection li::before {
  content: counter(r, decimal-leading-zero);
  position: absolute;
  left: 0; top: 0;
  width: 64px;
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--gold);
}

/* Bullets */
ul.bullets {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: 14px;
}
ul.bullets li {
  position: relative;
  padding-left: 28px;
  font-size: var(--type-body-sm);
  line-height: 1.45;
  color: var(--text);
}
ul.bullets li::before {
  content: '';
  position: absolute;
  left: 0; top: 14px;
  width: 12px; height: 1px;
  background: var(--gold);
}

/* Takeaway strip */
.takeaway {
  margin-top: auto;
  padding: 18px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--gold);
  border-radius: 4px;
  font-size: 24px;
  color: var(--text);
  line-height: 1.4;
}
.takeaway .arrow { color: var(--gold); font-weight: 700; margin-right: 10px; }

/* Section header layout */
.section-header {
  align-items: stretch !important;
  justify-content: center !important;
  padding: 0 !important;
}
.section-header-inner {
  width: 100%; height: 100%;
  padding: var(--pad-y) var(--pad-x);
  display: flex; flex-direction: column;
  justify-content: center;
  position: relative;
}
.section-num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: var(--tracking-caps);
  color: var(--gold);
  margin-bottom: 32px;
}
.section-eyebrow {
  font-size: 24px;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  font-weight: 700;
  color: var(--text-dim);
  margin-bottom: 24px;
}
.section-title {
  font-size: 128px;
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  line-height: 0.95;
  color: var(--text-white);
  margin: 0 0 48px 0;
  max-width: 1500px;
}
.section-lede {
  font-size: 30px;
  line-height: 1.4;
  color: var(--text-dim);
  max-width: 1300px;
  font-weight: 400;
}

/* Cover */
.cover {
  align-items: stretch !important;
  justify-content: center !important;
}
.cover .cover-inner {
  width: 100%; height: 100%;
  padding: var(--pad-y) var(--pad-x);
  display: flex; flex-direction: column;
  justify-content: space-between;
  position: relative;
}
.cover-mark {
  display: flex; align-items: center; gap: 18px;
  font-size: 26px;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  font-weight: 700;
  color: var(--text-dim);
}
.cover-mark .dot {
  width: 14px; height: 14px;
  background: var(--gold);
  border-radius: 50%;
}
.cover-title {
  font-size: 140px;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 0.95;
  color: var(--text-white);
  margin: 0;
}
.cover-title .accent { color: var(--gold); }
.cover-sub {
  font-size: 36px;
  line-height: 1.35;
  color: var(--text-dim);
  margin-top: 32px;
  max-width: 1400px;
}
.cover-foot {
  display: flex; justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 24px;
  color: var(--text-mute);
}

/* Decorative grid background for section headers */
.grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,193,7,0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,193,7,0.04) 1px, transparent 1px);
  background-size: 80px 80px;
  pointer-events: none;
}

/* Status pills */
.pill {
  display: inline-block;
  padding: 4px 12px;
  font-size: 24px;
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-dim);
}
.pill.gold { color: var(--gold); border-color: rgba(255,193,7,0.4); background: rgba(255,193,7,0.08); }
.pill.teal { color: var(--teal); border-color: rgba(3,198,178,0.4); background: rgba(3,198,178,0.08); }
.pill.red  { color: var(--red); border-color: rgba(255,180,171,0.4); background: rgba(255,180,171,0.08); }

/* Layout helpers */
.flex-col { display: flex; flex-direction: column; }
.flex-grow { flex: 1; min-height: 0; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: 12px; }
.gap-md { gap: 24px; }
.gap-lg { gap: 32px; }

/* big number */
.big-num {
  font-family: var(--font-mono);
  font-size: 88px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--gold);
  line-height: 1;
}

/* problem / solution badge */
.psbadge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--text-mute);
}
.psbadge.problem { color: var(--red); border-color: rgba(255,180,171,0.4); }
.psbadge.solution { color: var(--teal); border-color: rgba(3,198,178,0.4); }
.psbadge.concept { color: var(--gold); border-color: rgba(255,193,7,0.4); }

/* Sparkle marker */
.sparkle { color: var(--teal); }

/* fine-print */
.fine {
  font-size: 24px;
  color: var(--text-mute);
  line-height: 1.4;
}

/* Centered single-stat slide */
.stat-center {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center;
  height: 100%;
}

/* ascii-style boxes (for directory tree) */
.tree {
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 1.55;
  color: var(--text-dim);
  white-space: pre;
}
.tree .branch { color: var(--text-mute); }
.tree .file { color: var(--gold-dim); }
.tree .dir { color: var(--gold); font-weight: 600; }

/* Big keyword for emphasis */
.big-kw {
  font-family: var(--font-mono);
  color: var(--gold);
  font-weight: 700;
}

/* responsive code wrap inside small cards */
.card .code { font-size: 24px; padding: 18px 22px; }