/* ─── THE DADDY PROJECT — DEEP DIVES ────────────────────────────────────────
   Reading-optimized stylesheet. Shared by all deep dive pages.
   Components: callout, steps, ref-table, pull-quote, figure, author-note
   ─────────────────────────────────────────────────────────────────────────── */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #12120f;
  --bg-card:   rgba(20, 20, 16, 0.95);
  --bg-raised: rgba(30, 28, 22, 0.9);
  --border:    #2a2820;
  --text:      #e0ddd5;
  --text-dim:  #8a8070;
  --text-mute: #554f44;
  --amber:     #c8902a;
  --amber-dim: #7a5518;
  --amber-lt:  #f0c060;
  --green:     #5a9a5a;
  --red:       #9a4040;
  --blue:      #4a80a0;
  --purple:    #7060a0;
  --gold:      #d4aa40;
  --radius:    6px;
}

/* ── Base ─────────────────────────────────────────────────────────────────── */

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.85;
  font-size: 1rem;
  min-height: 100vh;
}

/* ── Site nav bar ─────────────────────────────────────────────────────────── */

.dd-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(18, 18, 15, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  padding: 0.65rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.dd-nav-brand {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
  text-decoration: none;
}

.dd-nav-links {
  display: flex;
  gap: 1.25rem;
  list-style: none;
  flex-wrap: wrap;
}

.dd-nav-links a {
  font-size: 0.78rem;
  color: var(--text-dim);
  text-decoration: none;
  letter-spacing: 0.05em;
  transition: color 0.15s;
}

.dd-nav-links a:hover { color: var(--text); }
.dd-nav-links a.active { color: var(--amber); }

/* ── Reading progress bar ─────────────────────────────────────────────────── */

#dd-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  background: var(--amber);
  width: 0%;
  z-index: 200;
  transition: width 0.1s linear;
}

/* ── Page layout ──────────────────────────────────────────────────────────── */

.dd-container {
  max-width: 760px;
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem;
}

/* ── Article header ───────────────────────────────────────────────────────── */

.dd-header {
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 2rem;
}

.dd-back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--text-mute);
  text-decoration: none;
  margin-bottom: 1.5rem;
  transition: color 0.15s;
}

.dd-back:hover { color: var(--amber); }

.dd-category {
  display: inline-block;
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border-radius: 3px;
  margin-bottom: 0.75rem;
  font-weight: 600;
}

.dd-category.tech     { background: rgba(74,128,160,0.15); color: var(--blue); border: 1px solid rgba(74,128,160,0.3); }
.dd-category.faith    { background: rgba(212,170,64,0.12);  color: var(--gold); border: 1px solid rgba(212,170,64,0.3); }
.dd-category.cars     { background: rgba(154,64,64,0.15);   color: #c07070; border: 1px solid rgba(154,64,64,0.3); }
.dd-category.life     { background: rgba(90,154,90,0.12);   color: var(--green); border: 1px solid rgba(90,154,90,0.3); }
.dd-category.history  { background: rgba(112,96,160,0.15);  color: #a090d0; border: 1px solid rgba(112,96,160,0.3); }
.dd-category.food     { background: rgba(180,120,60,0.15);  color: #d09060; border: 1px solid rgba(180,120,60,0.3); }

.dd-title {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--amber-lt);
  margin-bottom: 0.75rem;
}

.dd-subtitle {
  font-size: 1.1rem;
  color: var(--text-dim);
  font-weight: 300;
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

.dd-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.78rem;
  color: var(--text-mute);
}

.dd-meta span { display: flex; align-items: center; gap: 0.3rem; }

/* ── Article body typography ─────────────────────────────────────────────── */

.dd-body h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--amber-lt);
  margin: 2.5rem 0 0.85rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
}

.dd-body h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  margin: 1.75rem 0 0.6rem;
}

.dd-body h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--amber);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin: 1.5rem 0 0.5rem;
}

.dd-body p {
  margin-bottom: 1.15rem;
  max-width: 68ch;
}

.dd-body ul, .dd-body ol {
  margin: 0.75rem 0 1.15rem 1.5rem;
  max-width: 68ch;
}

.dd-body li { margin-bottom: 0.4rem; }

.dd-body a { color: var(--amber); text-decoration: none; border-bottom: 1px solid var(--amber-dim); }
.dd-body a:hover { color: var(--amber-lt); }

.dd-body code {
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  font-size: 0.85em;
  background: rgba(200,144,42,0.1);
  color: var(--amber-lt);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

.dd-body pre {
  background: #0a0a08;
  border: 1px solid var(--border);
  border-left: 3px solid var(--amber);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  margin: 1.25rem 0;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--amber-lt);
}

strong { color: var(--text); font-weight: 600; }
em { color: var(--text-dim); }

/* ── Callout blocks ───────────────────────────────────────────────────────── */

.dp-callout {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-left: 4px solid var(--amber);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  font-size: 0.92rem;
}

.dp-callout.note   { border-left-color: var(--blue); }
.dp-callout.tip    { border-left-color: var(--green); }
.dp-callout.warn   { border-left-color: var(--red); }
.dp-callout.faith  { border-left-color: var(--gold); }

.dp-callout-label {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
  color: var(--amber);
}

.dp-callout.note  .dp-callout-label { color: var(--blue); }
.dp-callout.tip   .dp-callout-label { color: var(--green); }
.dp-callout.warn  .dp-callout-label { color: #c07070; }
.dp-callout.faith .dp-callout-label { color: var(--gold); }

/* ── Pull quote ───────────────────────────────────────────────────────────── */

.dp-quote {
  margin: 2rem 0;
  padding: 1.25rem 1.5rem;
  border-left: 4px solid var(--amber);
  font-size: 1.15rem;
  font-style: italic;
  color: var(--amber-lt);
  line-height: 1.6;
}

.dp-quote cite {
  display: block;
  font-size: 0.75rem;
  font-style: normal;
  color: var(--text-mute);
  margin-top: 0.5rem;
  letter-spacing: 0.05em;
}

/* ── Step-by-step procedure ───────────────────────────────────────────────── */

.dp-steps {
  counter-reset: step-counter;
  list-style: none;
  margin: 1.25rem 0 1.5rem;
  padding: 0;
}

.dp-steps li {
  counter-increment: step-counter;
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
  align-items: flex-start;
}

.dp-steps li::before {
  content: counter(step-counter);
  background: var(--amber);
  color: var(--bg);
  font-size: 0.7rem;
  font-weight: 800;
  min-width: 1.6rem;
  height: 1.6rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 0.15rem;
}

/* ── Reference table ──────────────────────────────────────────────────────── */

.dp-table-wrap {
  overflow-x: auto;
  margin: 1.5rem 0;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.dp-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  min-width: 480px;
}

.dp-table th {
  background: rgba(200,144,42,0.12);
  color: var(--amber);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.7rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
}

.dp-table td {
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  vertical-align: top;
}

.dp-table tr:last-child td { border-bottom: none; }
.dp-table tr:nth-child(even) td { background: rgba(255,255,255,0.02); }
.dp-table tr:hover td { background: rgba(200,144,42,0.05); }

.dp-table .td-dim { color: var(--text-dim); font-size: 0.82rem; }
.dp-table .td-code { font-family: monospace; color: var(--amber-lt); font-size: 0.82rem; }
.dp-table .td-tag {
  display: inline-block;
  font-size: 0.65rem;
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  background: rgba(200,144,42,0.15);
  color: var(--amber);
  font-weight: 600;
  letter-spacing: 0.05em;
}

/* ── Layer cards (OSI / numbered stacks) ──────────────────────────────────── */

.dp-layer-stack { margin: 1.5rem 0; }

.dp-layer {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: 0;
  border: 1px solid var(--border);
  border-bottom: none;
  background: var(--bg-card);
  transition: background 0.15s;
}

.dp-layer:first-child { border-radius: var(--radius) var(--radius) 0 0; }
.dp-layer:last-child  { border-bottom: 1px solid var(--border); border-radius: 0 0 var(--radius) var(--radius); }
.dp-layer:hover { background: var(--bg-raised); }

.dp-layer-num {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--bg);
  background: var(--layer-color, var(--amber));
  min-height: 3.5rem;
}

.dp-layer-body {
  padding: 0.75rem 1rem;
  border-left: 1px solid var(--border);
}

.dp-layer-name {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--layer-color, var(--amber));
  margin-bottom: 0.15rem;
}

.dp-layer-sub {
  font-size: 0.75rem;
  color: var(--text-mute);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 0.3rem;
}

.dp-layer-desc {
  font-size: 0.85rem;
  color: var(--text-dim);
  line-height: 1.55;
}

.dp-layer-examples {
  margin-top: 0.3rem;
  font-size: 0.75rem;
  color: var(--text-mute);
}

/* ── Figure / photo caption ───────────────────────────────────────────────── */

.dp-figure {
  margin: 2rem 0;
}

.dp-figure img {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  display: block;
}

.dp-figure figcaption {
  font-size: 0.78rem;
  color: var(--text-mute);
  margin-top: 0.5rem;
  font-style: italic;
  text-align: center;
}

/* ── Author note (first-person aside) ────────────────────────────────────── */

.dp-author-note {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin: 1.75rem 0;
  font-size: 0.9rem;
  font-style: italic;
  color: var(--text-dim);
  position: relative;
}

.dp-author-note::before {
  content: 'PERSONAL NOTE';
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  font-style: normal;
  color: var(--text-mute);
  display: block;
  margin-bottom: 0.4rem;
}

/* ── Author bio card ──────────────────────────────────────────────────────── */

.dd-author-card {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.dd-author-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--amber-dim);
  border: 2px solid var(--border);
  object-fit: cover;
  flex-shrink: 0;
}

.dd-author-avatar-placeholder {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--amber-dim);
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.dd-author-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.2rem;
}

.dd-author-bio {
  font-size: 0.8rem;
  color: var(--text-dim);
  line-height: 1.6;
}

/* ── Index page ───────────────────────────────────────────────────────────── */

.dd-index-header {
  text-align: center;
  padding: 3rem 1.5rem 2rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
}

.dd-index-title {
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  font-weight: 700;
  color: var(--amber-lt);
  margin-bottom: 0.5rem;
}

.dd-index-sub {
  font-size: 1rem;
  color: var(--text-dim);
  max-width: 52ch;
  margin: 0 auto;
  line-height: 1.6;
}

.dd-filter-bar {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
  padding: 0 1.5rem;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

.dd-filter-pill {
  font-size: 0.72rem;
  padding: 0.3rem 0.75rem;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: none;
  color: var(--text-dim);
  cursor: pointer;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: all 0.15s;
}

.dd-filter-pill:hover  { border-color: var(--amber-dim); color: var(--text); }
.dd-filter-pill.active { border-color: var(--amber); color: var(--amber); background: rgba(200,144,42,0.08); }

.dd-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
  padding: 0 1.5rem 4rem;
  max-width: 1100px;
  margin: 0 auto;
}

.dd-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  transition: border-color 0.15s, background 0.15s;
  cursor: pointer;
}

.dd-card:hover {
  border-color: var(--amber-dim);
  background: var(--bg-raised);
}

.dd-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}

.dd-card-desc {
  font-size: 0.83rem;
  color: var(--text-dim);
  line-height: 1.55;
  flex: 1;
}

.dd-card-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.72rem;
  color: var(--text-mute);
  margin-top: 0.25rem;
}

.dd-card-stub {
  opacity: 0.45;
  pointer-events: none;
}

.dd-card-stub .dd-card-title::after {
  content: ' — coming soon';
  font-weight: 400;
  font-size: 0.75rem;
  color: var(--text-mute);
}

/* ── Footer ───────────────────────────────────────────────────────────────── */

.dd-footer {
  text-align: center;
  padding: 2rem 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--text-mute);
}

.dd-footer a { color: var(--amber-dim); text-decoration: none; }
.dd-footer a:hover { color: var(--amber); }

/* ── Responsive ───────────────────────────────────────────────────────────── */

@media (max-width: 600px) {
  .dd-container { padding: 2rem 1rem 4rem; }
  .dd-title     { font-size: 1.4rem; }
  .dd-nav       { padding: 0.5rem 1rem; }
  .dd-card-grid { padding: 0 1rem 3rem; grid-template-columns: 1fr; }
  .dd-filter-bar { padding: 0 1rem; }
  .dp-layer     { grid-template-columns: 2.5rem 1fr; }
}