/* ─────────────────────────────────────────────────────────────
   Skillful Alhazen — technical seminar deck
   Visual language inspired by the Alhazen jobhunt prototype:
   "Starry Night" dark palette, DM Serif Display + DM Sans + JetBrains Mono,
   geometric icons, schema-tag motifs, panel chrome with thin borders.
   ───────────────────────────────────────────────────────────── */

:root {
  /* type scale (1920×1080) */
  --type-display:   116px;
  --type-title:     72px;
  --type-subtitle:  44px;
  --type-lead:      36px;
  --type-body:      30px;
  --type-small:     24px;
  --type-meta:      18px;
  --type-mono:      22px;

  /* spacing */
  --pad-top:        96px;
  --pad-bottom:     96px;
  --pad-x:          120px;
  --gap-title:      52px;
  --gap-item:       28px;

  /* palette — Starry Night */
  --bg:        #070d1c;
  --bg-raised: #0c1628;
  --bg-sunken: #050a16;
  --panel:     rgba(12, 22, 40, 0.72);
  --panel-hi:  rgba(20, 34, 58, 0.85);
  --border:    rgba(90, 173, 175, 0.22);
  --border-hi: rgba(90, 173, 175, 0.42);
  --border-dim:rgba(200, 221, 232, 0.08);
  --fg:        #c8dde8;
  --fg-dim:    #aec4d4;
  --fg-faint:  #8ba4b8;

  --teal:   #5aadaf;
  --teal-d: rgba(90, 173, 175, 0.18);
  --blue:   #5b8ab8;
  --blue-d: rgba(91, 138, 184, 0.18);
  --olive:  #b8c84a;
  --olive-d:rgba(184, 200, 74, 0.18);
  --mint:   #62c4bc;
  --rust:   #c87a4a;
  --rust-d: rgba(200, 122, 74, 0.18);

  --mono:  ui-monospace, "JetBrains Mono", "SF Mono", Menlo, monospace;
  --serif: "DM Serif Display", "Iowan Old Style", Georgia, serif;
  --sans:  "DM Sans", -apple-system, system-ui, sans-serif;
}

/* "light" variant — for tweaks toggle */
:root[data-mode="light"] {
  --bg:        #f3efe6;
  --bg-raised: #eae5d8;
  --bg-sunken: #e3ddcd;
  --panel:     rgba(255, 252, 244, 0.72);
  --panel-hi:  rgba(255, 252, 244, 0.95);
  --border:    rgba(40, 90, 92, 0.28);
  --border-hi: rgba(40, 90, 92, 0.5);
  --border-dim:rgba(40, 60, 80, 0.12);
  --fg:        #1c2436;
  --fg-dim:    #5b6b80;
  --fg-faint:  #8a96a8;
  --teal:   #2a7273;
  --olive:  #6e7a1f;
  --blue:   #355c87;
  --rust:   #9a4a1d;
}

/* density variant */
:root[data-density="comfy"] {
  --pad-top: 120px; --pad-bottom: 120px; --pad-x: 140px;
  --gap-title: 64px; --gap-item: 36px;
}
:root[data-density="dense"] {
  --pad-top: 72px; --pad-bottom: 72px; --pad-x: 96px;
  --gap-title: 36px; --gap-item: 20px;
}

html, body {
  margin: 0; padding: 0;
  background: var(--bg); color: var(--fg);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}
* { box-sizing: border-box; }
::selection { background: var(--olive-d); color: var(--fg); }

/* ── slide framing ──────────────────────────────────────────── */
deck-stage section {
  width: 1920px; height: 1080px;
  background: var(--bg);
  position: relative;
  display: flex; flex-direction: column;
  padding: var(--pad-top) var(--pad-x) var(--pad-bottom);
  overflow: hidden;
}

/* watermark grid — faint dots, subtle starfield */
deck-stage section::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(200,221,232,0.05) 1px, transparent 0);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}
deck-stage section > * { position: relative; z-index: 1; }

/* ── chrome bar — slide identifier + accent rule ───────────── */
.chrome {
  position: absolute;
  top: 48px; left: var(--pad-x); right: var(--pad-x);
  display: flex; align-items: center; gap: 18px;
  font-family: var(--mono);
  font-size: var(--type-meta);
  color: var(--fg-faint);
  letter-spacing: 1.6px;
  text-transform: uppercase;
}
.chrome .rule { flex: 1; height: 1px; background: var(--border-dim); }
.chrome .accent { color: var(--teal); }
.chrome .num { color: var(--fg-dim); }

/* ── footer — author, venue ────────────────────────────────── */
.footer {
  position: absolute;
  bottom: 48px; left: var(--pad-x); right: var(--pad-x);
  display: flex; align-items: center; gap: 18px;
  font-family: var(--mono);
  font-size: var(--type-meta);
  color: var(--fg-faint);
  letter-spacing: 1.4px;
}
.footer .rule { flex: 1; height: 1px; background: var(--border-dim); }

/* ── typographic primitives ────────────────────────────────── */
.eyebrow {
  font-family: var(--mono);
  font-size: var(--type-small);
  letter-spacing: 2.6px;
  text-transform: uppercase;
  color: var(--fg-faint);
  margin: 0;
}
.title {
  font-family: var(--serif);
  font-size: var(--type-title);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin: 0;
  text-wrap: balance;
}
.title-display {
  font-family: var(--serif);
  font-size: var(--type-display);
  font-weight: 400;
  line-height: 0.98;
  letter-spacing: -0.025em;
  color: var(--fg);
  margin: 0;
  text-wrap: balance;
}
.subtitle {
  font-family: var(--serif);
  font-size: var(--type-subtitle);
  font-weight: 400;
  line-height: 1.18;
  color: var(--fg-dim);
  margin: 0;
  text-wrap: pretty;
}
.lead {
  font-family: var(--sans);
  font-size: var(--type-lead);
  font-weight: 400;
  line-height: 1.35;
  color: var(--fg);
  margin: 0;
  text-wrap: pretty;
}
.body {
  font-family: var(--sans);
  font-size: var(--type-body);
  font-weight: 400;
  line-height: 1.42;
  color: var(--fg-dim);
  margin: 0;
  text-wrap: pretty;
}
.mono {
  font-family: var(--mono);
  font-size: var(--type-mono);
  letter-spacing: 0.4px;
  color: var(--fg-dim);
}
.italic {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  color: var(--fg-dim);
}

.fg     { color: var(--fg) !important; }
.fg-dim { color: var(--fg-dim) !important; }
.fg-faint { color: var(--fg-faint) !important; }
.teal   { color: var(--teal) !important; }
.olive  { color: var(--olive) !important; }
.blue   { color: var(--blue) !important; }
.mint   { color: var(--mint) !important; }
.rust   { color: var(--rust) !important; }

a { color: var(--rust); text-decoration: underline; text-underline-offset: 3px; }
a:hover { color: var(--fg); }

/* ── schema-tag motif (lifted from atoms.jsx) ──────────────── */
.schema-tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono);
  font-size: var(--type-small);
  letter-spacing: 0.6px;
  color: var(--fg-faint);
  padding: 4px 10px;
  border: 1px dashed var(--border-dim);
  border-radius: 4px;
  background: transparent;
}
.schema-tag .bracket { opacity: 0.55; }

.kind-chip {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--mono);
  font-size: var(--type-small);
  letter-spacing: 1.4px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 4px;
  background: transparent;
  border: 1px solid currentColor;
}
.kind-chip .glyph { width: 14px; height: 14px; }

.kbd {
  font-family: var(--mono);
  font-size: 22px;
  padding: 4px 12px;
  border: 1px solid var(--border-dim);
  border-radius: 5px;
  color: var(--fg-dim);
  background: rgba(255,255,255,0.02);
  letter-spacing: 1px;
}

/* ── panel motif ───────────────────────────────────────────── */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 28px 32px;
  display: flex; flex-direction: column; gap: 18px;
}
.panel.elevated {
  border-color: rgba(184,200,74,0.32);
  background: rgba(184,200,74,0.04);
}
.panel-label {
  font-family: var(--mono);
  font-size: var(--type-small);
  letter-spacing: 1.8px;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin: 0;
}

/* ── KV ────────────────────────────────────────────────────── */
.kv { display: flex; flex-direction: column; gap: 6px; }
.kv .k {
  font-family: var(--mono);
  font-size: 18px;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--fg-faint);
}
.kv .v {
  font-family: var(--sans);
  font-size: var(--type-body);
  color: var(--fg);
}

/* ── numbered marker (for problem slides) ──────────────────── */
.marker {
  display: inline-flex; align-items: baseline; gap: 14px;
  font-family: var(--mono);
  font-size: var(--type-small);
  letter-spacing: 2.4px;
  text-transform: uppercase;
  color: var(--olive);
}
.marker .n {
  font-family: var(--serif);
  font-size: 84px;
  letter-spacing: -0.02em;
  color: var(--olive);
  line-height: 1;
}

/* ── tables ────────────────────────────────────────────────── */
table.skill-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: var(--type-small);
  color: var(--fg);
}
table.skill-table thead th {
  text-align: left;
  font-family: var(--mono);
  font-size: 18px;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  color: var(--fg-faint);
  font-weight: 600;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border-dim);
}
table.skill-table tbody td {
  padding: 18px 16px;
  border-bottom: 1px solid var(--border-dim);
  vertical-align: top;
  line-height: 1.4;
}
table.skill-table tbody tr:last-child td { border-bottom: none; }
table.skill-table .skill-name {
  font-family: var(--mono);
  color: var(--teal);
  letter-spacing: 0.5px;
}
.tag-pill {
  display: inline-block;
  font-family: var(--mono);
  font-size: 16px;
  padding: 3px 10px;
  border: 1px solid var(--border-dim);
  border-radius: 3px;
  color: var(--fg-dim);
  letter-spacing: 0.6px;
}
.tag-pill.core { color: var(--teal); border-color: rgba(90,173,175,0.4); }
.tag-pill.ext  { color: var(--olive); border-color: rgba(184,200,74,0.4); }

/* ── timeline / arrow primitives ───────────────────────────── */
.arrow {
  font-family: var(--mono);
  color: var(--teal);
  letter-spacing: 0.5px;
}

/* ── image placeholder ─────────────────────────────────────── */
.image-slot {
  background:
    repeating-linear-gradient(
      135deg,
      rgba(200,221,232,0.03) 0 8px,
      rgba(200,221,232,0.06) 8px 16px
    ),
    var(--bg-raised);
  border: 1px solid var(--border-dim);
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono);
  font-size: 18px;
  color: var(--fg-faint);
  letter-spacing: 1.2px;
  text-transform: uppercase;
  text-align: center;
  padding: 24px;
}

/* ── full-bleed cover slide ────────────────────────────────── */
.cover {
  padding: var(--pad-top) var(--pad-x) var(--pad-bottom);
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 80px;
  align-items: center;
}

/* ── two-column slot ───────────────────────────────────────── */
.cols-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; }
.cols-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 60px; }

/* ── thin rule ─────────────────────────────────────────────── */
hr.rule {
  border: none; height: 1px; background: var(--border-dim); margin: 0;
}

/* ── code block ────────────────────────────────────────────── */
pre.code {
  font-family: var(--mono);
  font-size: 22px;
  line-height: 1.5;
  color: var(--fg);
  background: var(--bg-sunken);
  border: 1px solid var(--border-dim);
  border-radius: 6px;
  padding: 24px 28px;
  margin: 0;
  overflow: hidden;
  white-space: pre;
}
pre.code .c { color: var(--fg-faint); }
pre.code .k { color: var(--olive); }
pre.code .s { color: var(--mint); }
pre.code .n { color: var(--blue); }

/* ── architecture diagram block ────────────────────────────── */
.box {
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
  padding: 22px 24px;
  display: flex; flex-direction: column; gap: 8px;
}
.box.olive { border-color: rgba(184,200,74,0.42); background: rgba(184,200,74,0.04); }
.box.teal  { border-color: rgba(90,173,175,0.42); background: rgba(90,173,175,0.04); }
.box.blue  { border-color: rgba(91,138,184,0.42); background: rgba(91,138,184,0.04); }
.box .box-label {
  font-family: var(--mono);
  font-size: 18px;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  color: var(--fg-faint);
}
.box .box-title {
  font-family: var(--sans);
  font-size: 26px;
  font-weight: 500;
  color: var(--fg);
  letter-spacing: -0.005em;
}
.box .box-sub {
  font-family: var(--mono);
  font-size: 18px;
  color: var(--fg-dim);
  line-height: 1.4;
}