/* ═══════════════════════════════════════════════════════════
   style.css — Agent Learning Roadmap (personal tracker, not a chapter)
   Tokens from design-system/tokens.css + chrome from chapters/02-agentic-loops
═══════════════════════════════════════════════════════════ */

/* ── Tokens (canonical, not the chapters' stripped copy) ── */
:root {
  --bg:        #0A0A0F;
  --surface:   #12121A;
  --surface-2: #1A1A24;

  --border:    #1E1E2E;
  --border-2:  #2A2A3E;

  --text:      #E2E8F0;
  --muted:     #64748B;
  --muted-2:   #94A3B8;

  --blue:      #4F8EF7;
  --teal:      #2DD4BF;
  --amber:     #F59E0B;
  --green:     #22C55E;
  --red:       #EF4444;
  --purple:    #A78BFA;

  --blue-dim:   rgba(79, 142, 247, 0.12);
  --teal-dim:   rgba(45, 212, 191, 0.12);
  --amber-dim:  rgba(245, 158, 11, 0.12);
  --green-dim:  rgba(34, 197, 94, 0.12);
  --red-dim:    rgba(239, 68, 68, 0.12);
  --purple-dim: rgba(167, 139, 250, 0.12);

  --radius-card: 12px;
  --radius-el:   8px;
  --radius-pill: 999px;

  --font-display: 'Bricolage Grotesque', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', monospace;
  --font-body:    'Inter', system-ui, sans-serif;

  --max-w: 860px;
}

[data-theme="light"] {
  --bg:        #F8FAFC;
  --surface:   #FFFFFF;
  --surface-2: #F1F5F9;

  --border:    #E2E8F0;
  --border-2:  #CBD5E1;

  --text:      #0F172A;
  --muted:     #64748B;
  --muted-2:   #94A3B8;

  --blue:   #2563EB;
  --teal:   #0D9488;
  --amber:  #D97706;
  --green:  #16A34A;
  --red:    #DC2626;
  --purple: #7C3AED;

  --blue-dim:   rgba(37, 99, 235, 0.08);
  --teal-dim:   rgba(13, 148, 136, 0.08);
  --amber-dim:  rgba(217, 119, 6, 0.08);
  --green-dim:  rgba(22, 163, 74, 0.08);
  --red-dim:    rgba(220, 38, 38, 0.08);
  --purple-dim: rgba(124, 58, 237, 0.08);
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  transition: background 0.2s ease, color 0.2s ease;
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Theme toggle ── */
.theme-toggle {
  position: fixed;
  top: 16px;
  right: 20px;
  z-index: 200;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease, background 0.2s ease;
}
.theme-toggle:hover { color: var(--text); border-color: var(--muted); }

/* ── Top nav ── */
.top-nav { border-bottom: 1px solid var(--border); }
.top-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
}
.top-nav a { color: var(--muted); transition: color 0.15s ease; }
.top-nav a:hover { color: var(--text); }

/* ── Header ── */
.site-header {
  padding: 56px 0 32px;
  border-bottom: 1px solid var(--border);
}

.site-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 5vw, 44px);
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--text);
  margin-bottom: 12px;
}

.site-attribution {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.04em;
  max-width: 560px;
  line-height: 1.6;
}

/* ── Progress dashboard ── */
.dash-section {
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
}

.stat-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.stat-item {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 16px 20px;
  flex: 1;
  min-width: 140px;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--blue);
  line-height: 1;
  margin-bottom: 6px;
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.stat-item-overall {
  background: var(--surface-2);
  border-color: var(--blue);
}
.stat-item-overall .stat-value { color: var(--blue); }

/* ── The journey (overview section) ── */
.journey-section { padding: 8px 0 8px; }

.subnav {
  display: flex;
  gap: 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}
.subnav a { color: var(--muted); transition: color 0.15s ease; }
.subnav a:hover { color: var(--blue); }

/* ── Roadmap sections ── */
.main-content { padding-bottom: 40px; }

.roadmap-section { padding: 48px 0 16px; }

.roadmap-h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 3vw, 26px);
  letter-spacing: -0.01em;
  color: var(--text);
  margin-bottom: 8px;
}

.roadmap-intro {
  font-size: 14px;
  color: var(--muted-2);
  line-height: 1.6;
  max-width: 640px;
  margin-bottom: 24px;
}

/* ── Why this page exists ── */
.why-section { padding: 40px 0 8px; }
.why-body { max-width: 640px; }
.why-body p {
  font-size: 15px;
  color: var(--text);
  line-height: 1.7;
  margin-bottom: 16px;
}
.why-body p:last-child { margin-bottom: 0; }

/* ── Resource links (shared: wedge cards, tier groups, feature tracker) ── */
.resource-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  margin: 4px 0 16px;
}
.resource-links a {
  font-size: 12px;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s ease;
}
.resource-links a:hover { color: var(--blue); }

/* ── Checkbox primitive (ported from journaling-app) ── */
.hh-box {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-radius: 5px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s ease, border-color 0.15s ease;
  font-size: 12px;
  font-weight: 700;
  color: transparent;
}
.hh-box::after { content: '✓'; }

.topic-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-el);
  cursor: pointer;
  user-select: none;
  transition: background 0.15s ease;
}
.topic-row:hover { background: var(--surface-2); }
.topic-row.checked .hh-box { background: var(--green); border-color: var(--green); color: #000; }
.topic-row.checked .topic-text,
.topic-row.checked .topic-name {
  color: var(--muted);
  text-decoration: line-through;
  text-decoration-color: var(--border-2);
}

.topic-text {
  font-size: 14px;
  color: var(--text);
  line-height: 1.5;
}

.topic-row.with-desc { align-items: flex-start; }
.topic-row.with-desc .hh-box { margin-top: 2px; }
.topic-main { display: flex; flex-direction: column; gap: 3px; }
.topic-name { font-size: 14.5px; font-weight: 500; color: var(--text); }
.topic-desc { font-size: 13px; color: var(--muted-2); line-height: 1.55; }

/* ── Expand-card shell (shared by wedge-card + tier-group) ── */
.expand-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  margin-bottom: 12px;
  overflow: hidden;
}
.expand-card summary { list-style: none; cursor: pointer; }
.expand-card summary::-webkit-details-marker { display: none; }

.wedge-summary,
.tier-summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
}

.wedge-num {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--blue);
  flex-shrink: 0;
}

.wedge-action {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text);
  flex: 1;
}

.tier-label {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--teal);
  flex: 1;
}

.wedge-count,
.tier-count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  flex-shrink: 0;
}

.wedge-caret,
.tier-caret {
  color: var(--muted);
  transition: transform 0.15s ease;
  flex-shrink: 0;
}
.expand-card[open] .wedge-caret,
.expand-card[open] .tier-caret { transform: rotate(180deg); }

.wedge-body,
.tier-body {
  padding: 4px 12px 16px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.wedge-narrative {
  font-size: 13.5px;
  color: var(--muted-2);
  line-height: 1.6;
  font-style: italic;
  padding: 12px 4px 4px;
  margin: 0;
}
.wedge-body .resource-links,
.tier-body .resource-links {
  padding: 0 4px;
  margin: 0 0 12px;
}


/* ── Progress bar (Section B) ── */
.progress-bar-track {
  height: 6px;
  border-radius: 3px;
  background: var(--border);
  overflow: hidden;
  margin-bottom: 8px;
}
.progress-bar-fill {
  width: 0;
  height: 100%;
  background: var(--green);
  border-radius: 3px;
  transition: width 0.3s ease;
}
.progress-bar-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
  margin-bottom: 20px;
}

/* ── Filter bar ── */
.filter-bar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.toggle-btn {
  padding: 7px 16px;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  cursor: pointer;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  transition: all 0.15s ease;
}
.toggle-btn.active {
  background: var(--blue-dim);
  border-color: var(--blue);
  color: var(--blue);
}
.toggle-btn:hover:not(.active) { border-color: var(--muted); color: var(--text); }

/* ── Feature list (Section B) ── */
.feat-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.feat-row {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}
.feat-row:hover { border-color: var(--border-2); background: var(--surface-2); }
.feat-row .hh-box { margin-top: 2px; }
.feat-row.checked { background: var(--surface-2); }
.feat-row.checked .feat-name { color: var(--muted); text-decoration: line-through; text-decoration-color: var(--border-2); }
.feat-row.checked .hh-box { background: var(--green); border-color: var(--green); color: #000; }

.feat-main { display: flex; flex-direction: column; gap: 6px; flex: 1; min-width: 0; }
.feat-name-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.feat-name { font-size: 14.5px; font-weight: 600; color: var(--text); }
.feat-desc { font-size: 13px; color: var(--muted-2); line-height: 1.55; }
.feat-next { font-size: 12.5px; color: var(--text); line-height: 1.5; }
.feat-next-label { font-family: var(--font-mono); color: var(--muted); margin-right: 4px; }

/* ── Badges ── */
.badge {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: var(--radius-pill);
}
.badge-priority-now   { background: var(--blue-dim);   color: var(--blue); }
.badge-priority-soon  { background: var(--amber-dim);  color: var(--amber); }
.badge-priority-lower { background: var(--border);     color: var(--muted); }
.badge-priority-other { background: var(--purple-dim); color: var(--purple); }
.badge-priority-expert { background: var(--teal-dim);   color: var(--teal); }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  user-select: none;
}
.btn-ghost {
  background: transparent;
  color: var(--muted);
  border-color: var(--border);
}
.btn-ghost:hover { color: var(--red); border-color: var(--red); }

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 0 48px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}
.site-footer .container { display: flex; flex-direction: column; gap: 14px; }
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--blue); }