/* =============================================
   Claude Code Report — Final Presentation Theme
   ============================================= */

/* ---------- Design Tokens ---------- */
:root {
  /* Background */
  --bg-primary:   #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary:  #1c2128;
  --bg-card:      #1c2333;
  --bg-card-hover:#222d3d;

  /* Borders */
  --border:       #30363d;
  --border-light: #3b4450;

  /* Text */
  --text-primary:   #e6edf3;
  --text-secondary: #8b949e;
  --text-tertiary:  #6e7681;
  --text-link:      #58a6ff;

  /* Accent Palette */
  --accent:       #58a6ff;
  --accent-dim:   rgba(88,166,255,.15);
  --green:        #3fb950;
  --green-dim:    rgba(63,185,80,.15);
  --orange:       #d29922;
  --orange-dim:   rgba(210,153,34,.15);
  --red:          #f85149;
  --red-dim:      rgba(248,81,73,.15);
  --purple:       #bc8cff;
  --purple-dim:   rgba(188,140,255,.15);
  --cyan:         #39d353;
  --yellow:       #e3b341;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  /* Sizing */
  --slide-max-w: 1120px;
  --radius:      8px;
  --radius-lg:   12px;
  --radius-sm:   4px;

  /* Animation */
  --ease-out: cubic-bezier(.22,1,.36,1);
  --duration: .45s;
}

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

html, body {
  height: 100%;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

/* ---------- Presentation Layout ---------- */
#presentation {
  display: flex;
  height: calc(100vh - 52px);
}

#slide-viewport {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  padding: 32px 40px;
  position: relative;
}

#slide-container {
  width: 100%;
  max-width: var(--slide-max-w);
  max-height: 100%;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

#slide-container::-webkit-scrollbar { width: 5px; }
#slide-container::-webkit-scrollbar-track { background: transparent; }
#slide-container::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ---------- Notes Panel ---------- */
#notes-panel {
  width: 300px;
  min-width: 240px;
  max-width: 360px;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  transition: width .3s var(--ease-out), opacity .3s var(--ease-out);
  overflow: hidden;
}

#notes-panel.hidden {
  width: 0;
  min-width: 0;
  opacity: 0;
  border-left: none;
}

.notes-header {
  padding: 14px 18px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  text-transform: uppercase;
  letter-spacing: .5px;
}

/* notes-icon removed — no emoji in UI */

#notes-content {
  padding: 18px;
  overflow-y: auto;
  flex: 1;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

#notes-content p { margin-bottom: 10px; }
#notes-content strong { color: var(--text-primary); }
#notes-content code {
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--bg-tertiary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

/* ---------- Navigation Bar ---------- */
#nav-bar {
  height: 52px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 0 20px;
  user-select: none;
}

.nav-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  width: 34px;
  height: 34px;
  border-radius: var(--radius);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .2s ease;
}

.nav-btn:hover { color: var(--text-primary); border-color: var(--border-light); background: var(--bg-tertiary); }
.nav-btn:disabled { opacity: .3; cursor: default; }
.nav-btn:disabled:hover { background: none; color: var(--text-secondary); border-color: var(--border); }

#nav-dots {
  display: flex;
  gap: 6px;
  align-items: center;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border);
  cursor: pointer;
  transition: all .25s var(--ease-out);
}

.dot:hover { background: var(--text-secondary); }
.dot.active {
  background: var(--accent);
  box-shadow: 0 0 8px rgba(88,166,255,.4);
  transform: scale(1.25);
}

#slide-counter {
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--text-tertiary);
  min-width: 48px;
  text-align: center;
}

/* ---------- Slide Entry Animation ---------- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.slide-enter {
  animation: fadeIn var(--duration) var(--ease-out);
}

.anim {
  opacity: 0;
  animation: fadeInUp var(--duration) var(--ease-out) forwards;
}

.anim:nth-child(1)  { animation-delay: .05s; }
.anim:nth-child(2)  { animation-delay: .10s; }
.anim:nth-child(3)  { animation-delay: .15s; }
.anim:nth-child(4)  { animation-delay: .20s; }
.anim:nth-child(5)  { animation-delay: .25s; }
.anim:nth-child(6)  { animation-delay: .30s; }
.anim:nth-child(7)  { animation-delay: .35s; }
.anim:nth-child(8)  { animation-delay: .40s; }
.anim:nth-child(9)  { animation-delay: .45s; }
.anim:nth-child(10) { animation-delay: .50s; }
.anim:nth-child(11) { animation-delay: .55s; }
.anim:nth-child(12) { animation-delay: .60s; }

/* ---------- Title Slide ---------- */
.title-slide {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 70vh;
  gap: 20px;
}

.title-slide h1 {
  font-size: 2.8em;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.02em;
  background: linear-gradient(135deg, var(--accent) 0%, var(--purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.title-slide .subtitle {
  font-size: 1.3em;
  color: var(--text-secondary);
  font-weight: 400;
  max-width: 600px;
}

.title-slide .meta {
  font-size: .9em;
  color: var(--text-tertiary);
  margin-top: 12px;
}

.title-slide .tag-row {
  display: flex;
  gap: 10px;
  margin-top: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.tag {
  font-size: 12px;
  font-weight: 500;
  padding: 4px 14px;
  border-radius: 20px;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  background: var(--bg-tertiary);
}

.tag.blue   { color: var(--accent); border-color: var(--accent); background: var(--accent-dim); }
.tag.green  { color: var(--green);  border-color: var(--green);  background: var(--green-dim); }
.tag.orange { color: var(--orange); border-color: var(--orange); background: var(--orange-dim); }
.tag.purple { color: var(--purple); border-color: var(--purple); background: var(--purple-dim); }
.tag.red    { color: var(--red);    border-color: var(--red);    background: var(--red-dim); }

/* ---------- Section Title Slide ---------- */
.section-slide {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  text-align: center;
  gap: 16px;
}

.section-slide .section-number {
  font-size: 4em;
  font-weight: 800;
  color: var(--accent);
  opacity: .2;
  line-height: 1;
}

.section-slide h2 {
  font-size: 2.2em;
  font-weight: 700;
  color: var(--text-primary);
}

.section-slide .section-desc {
  font-size: 1.1em;
  color: var(--text-secondary);
  max-width: 500px;
}

/* ---------- Content Slide ---------- */
.slide h2 {
  font-size: 1.6em;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 12px;
}

.slide h2 .icon {
  font-size: .75em;
  font-weight: 700;
  font-family: var(--font-mono);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: var(--radius);
  flex-shrink: 0;
}

.slide h3 {
  font-size: 1.15em;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
  margin-top: 20px;
}

.slide p {
  color: var(--text-secondary);
  margin-bottom: 12px;
  font-size: .95em;
}

/* ---------- Card Grid ---------- */
.card-grid {
  display: grid;
  gap: 14px;
}

.card-grid.cols-2 { grid-template-columns: 1fr 1fr; }
.card-grid.cols-3 { grid-template-columns: 1fr 1fr 1fr; }
.card-grid.cols-4 { grid-template-columns: 1fr 1fr 1fr 1fr; }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: border-color .2s ease, background .2s ease;
}

.card:hover {
  border-color: var(--border-light);
  background: var(--bg-card-hover);
}

.card .card-icon {
  font-size: 1.5em;
  margin-bottom: 10px;
  display: block;
}

.card .card-label-tag {
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 10px;
  display: inline-block;
  padding: 2px 8px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.card .card-title {
  font-size: .95em;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.card .card-desc {
  font-size: .85em;
  color: var(--text-secondary);
  line-height: 1.5;
}

.card.accent-border  { border-left: 3px solid var(--accent); }
.card.green-border   { border-left: 3px solid var(--green); }
.card.orange-border  { border-left: 3px solid var(--orange); }
.card.purple-border  { border-left: 3px solid var(--purple); }
.card.red-border     { border-left: 3px solid var(--red); }

/* ---------- Code Block ---------- */
.code-block {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  overflow-x: auto;
  margin: 12px 0;
  position: relative;
}

.code-block .code-label {
  position: absolute;
  top: 0;
  right: 0;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .5px;
  padding: 4px 10px;
  background: var(--border);
  color: var(--text-secondary);
  border-radius: 0 var(--radius) 0 var(--radius);
}

/* Syntax highlighting classes */
.kw  { color: #ff7b72; }   /* keyword */
.fn  { color: #d2a8ff; }   /* function */
.str { color: #a5d6ff; }   /* string */
.cm  { color: #6e7681; font-style: italic; }  /* comment */
.num { color: #79c0ff; }   /* number */
.op  { color: #ff7b72; }   /* operator */
.ty  { color: #ffa657; }   /* type */
.pr  { color: #7ee787; }   /* property */
.at  { color: #d2a8ff; }   /* attribute/decorator */
.vr  { color: #ffa657; }   /* variable */
.bool { color: #79c0ff; }  /* boolean */
.imp { color: #ff7b72; }   /* import */
.param { color: #ffa657; } /* parameter */

/* ---------- Flow Diagrams (Horizontal) ---------- */
.flow-diagram {
  display: flex;
  align-items: center;
  gap: 0;
  margin: 16px 0;
  flex-wrap: wrap;
  justify-content: center;
}

.flow-node {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 18px;
  text-align: center;
  font-size: .85em;
  min-width: 100px;
}

.flow-node .flow-label {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.flow-node .flow-desc {
  font-size: .8em;
  color: var(--text-secondary);
}

.flow-node.blue   { border-color: var(--accent); background: var(--accent-dim); }
.flow-node.green  { border-color: var(--green);  background: var(--green-dim); }
.flow-node.orange { border-color: var(--orange); background: var(--orange-dim); }
.flow-node.purple { border-color: var(--purple); background: var(--purple-dim); }
.flow-node.red    { border-color: var(--red);    background: var(--red-dim); }

.flow-arrow {
  color: var(--text-tertiary);
  font-size: 1.2em;
  padding: 0 6px;
  flex-shrink: 0;
}

/* ---------- Vertical Flow ---------- */
.vflow {
  display: flex;
  flex-direction: column;
  gap: 0;
  align-items: center;
  margin: 16px 0;
}

.vflow-node {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 24px;
  text-align: center;
  width: 100%;
  max-width: 600px;
}

.vflow-arrow {
  color: var(--text-tertiary);
  font-size: 1.2em;
  padding: 4px 0;
}

/* ---------- Table ---------- */
.table-wrap {
  overflow-x: auto;
  margin: 12px 0;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: .85em;
}

thead {
  background: var(--bg-tertiary);
}

th {
  padding: 10px 16px;
  text-align: left;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
}

tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--bg-card); }

td code, th code {
  font-family: var(--font-mono);
  font-size: .9em;
  background: var(--bg-tertiary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  color: var(--accent);
}

/* ---------- Highlight Boxes ---------- */
.highlight-box {
  border-radius: var(--radius);
  padding: 16px 20px;
  margin: 12px 0;
  font-size: .9em;
  line-height: 1.6;
  border-left: 3px solid;
}

.highlight-box.blue   { border-color: var(--accent); background: var(--accent-dim); color: var(--accent); }
.highlight-box.green  { border-color: var(--green);  background: var(--green-dim);  color: var(--green); }
.highlight-box.orange { border-color: var(--orange); background: var(--orange-dim); color: var(--orange); }
.highlight-box.red    { border-color: var(--red);    background: var(--red-dim);    color: var(--red); }
.highlight-box.purple { border-color: var(--purple); background: var(--purple-dim); color: var(--purple); }

.highlight-box strong { color: inherit; }

/* ---------- Comparison Layout ---------- */
.compare-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 16px 0;
}

.compare-col {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.compare-col h4 {
  font-size: .95em;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.compare-col ul {
  list-style: none;
  font-size: .85em;
}

.compare-col li {
  padding: 4px 0;
  color: var(--text-secondary);
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.compare-col li::before {
  content: '•';
  color: var(--text-tertiary);
  flex-shrink: 0;
}

/* ---------- Phase Timeline ---------- */
.phase-timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 16px 0;
}

.phase-timeline.cols-3 { grid-template-columns: repeat(3, 1fr); }
.phase-timeline.cols-5 { grid-template-columns: repeat(5, 1fr); }

.phase {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
  position: relative;
}

.phase .phase-num {
  font-size: 1.8em;
  font-weight: 800;
  color: var(--accent);
  opacity: .25;
  line-height: 1;
  margin-bottom: 8px;
}

.phase .phase-title {
  font-size: .9em;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.phase .phase-desc {
  font-size: .8em;
  color: var(--text-secondary);
  line-height: 1.5;
}

.phase.blue   { border-top: 3px solid var(--accent); }
.phase.green  { border-top: 3px solid var(--green); }
.phase.orange { border-top: 3px solid var(--orange); }
.phase.purple { border-top: 3px solid var(--purple); }
.phase.red    { border-top: 3px solid var(--red); }

/* ---------- Step / Gate Layout ---------- */
.gate-steps {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 16px 0;
}

.gate-step {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
}

.gate-step .step-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent-dim);
  color: var(--accent);
  font-weight: 700;
  font-size: .85em;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.gate-step .step-content {
  flex: 1;
}

.gate-step .step-title {
  font-weight: 600;
  color: var(--text-primary);
  font-size: .9em;
  margin-bottom: 4px;
}

.gate-step .step-desc {
  font-size: .85em;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ---------- File Tree ---------- */
.ftree {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.8;
  margin: 12px 0;
}

.ftree .dir  { color: var(--accent); font-weight: 500; }
.ftree .file { color: var(--text-secondary); }
.ftree .desc { color: var(--text-tertiary); font-style: italic; font-family: var(--font-sans); font-size: 12px; }

/* ---------- Layer / Architecture Diagram ---------- */
.layer-diagram {
  display: grid;
  gap: 14px;
  margin: 16px 0;
}

.layer-diagram.cols-2 { grid-template-columns: 1fr 1fr; }
.layer-diagram.cols-3 { grid-template-columns: 1fr 1fr 1fr; }

.layer-col {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px;
}

.layer-col .layer-title {
  font-weight: 600;
  font-size: .9em;
  color: var(--text-primary);
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
}

.layer-col .layer-items {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.layer-col .layer-item {
  font-size: .82em;
  color: var(--text-secondary);
  padding: 4px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.layer-col .layer-item code {
  font-family: var(--font-mono);
  font-size: .9em;
  color: var(--accent);
  background: var(--bg-tertiary);
  padding: 1px 5px;
  border-radius: var(--radius-sm);
}

/* ---------- Priority Chain ---------- */
.priority-chain {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 16px 0;
}

.priority-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: .9em;
}

.priority-item .pri-rank {
  font-weight: 700;
  color: var(--accent);
  font-family: var(--font-mono);
  min-width: 24px;
}

.priority-item .pri-label {
  font-weight: 600;
  color: var(--text-primary);
}

.priority-item .pri-desc {
  color: var(--text-secondary);
  font-size: .9em;
  margin-left: auto;
}

/* ---------- Stat Row ---------- */
.stat-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 14px;
  margin: 16px 0;
}

.stat-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  text-align: center;
}

.stat-item .stat-value {
  font-size: 1.8em;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 6px;
  font-family: var(--font-mono);
}

.stat-item .stat-label {
  font-size: .8em;
  color: var(--text-secondary);
}

.stat-item.green .stat-value  { color: var(--green); }
.stat-item.orange .stat-value { color: var(--orange); }
.stat-item.purple .stat-value { color: var(--purple); }
.stat-item.red .stat-value    { color: var(--red); }

/* ---------- List Styles ---------- */
.bullet-list {
  list-style: none;
  margin: 10px 0;
}

.bullet-list li {
  padding: 6px 0;
  font-size: .9em;
  color: var(--text-secondary);
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.bullet-list li .li-icon {
  flex-shrink: 0;
  width: 20px;
  text-align: center;
}

.bullet-list li strong { color: var(--text-primary); }

.bullet-list li code {
  font-family: var(--font-mono);
  font-size: .85em;
  color: var(--accent);
  background: var(--bg-tertiary);
  padding: 1px 5px;
  border-radius: var(--radius-sm);
}

/* ---------- Inline Utilities ---------- */
.mono { font-family: var(--font-mono); }
.dim  { color: var(--text-tertiary); }
.small { font-size: .85em; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-1 { margin-top: 8px; }
.mb-1 { margin-bottom: 8px; }
.mt-2 { margin-top: 16px; }
.mb-2 { margin-bottom: 16px; }
.text-center { text-align: center; }
.text-accent { color: var(--accent); }
.text-green  { color: var(--green); }
.text-orange { color: var(--orange); }
.text-red    { color: var(--red); }
.text-purple { color: var(--purple); }
.fw-600 { font-weight: 600; }
.fw-700 { font-weight: 700; }

.badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 10px;
  vertical-align: middle;
}

.badge.blue   { background: var(--accent-dim); color: var(--accent); }
.badge.green  { background: var(--green-dim);  color: var(--green); }
.badge.orange { background: var(--orange-dim); color: var(--orange); }
.badge.purple { background: var(--purple-dim); color: var(--purple); }
.badge.red    { background: var(--red-dim);    color: var(--red); }

/* ---------- Divider ---------- */
.divider {
  height: 1px;
  background: var(--border);
  margin: 20px 0;
}

/* ---------- Quote ---------- */
.quote {
  border-left: 3px solid var(--accent);
  padding: 12px 20px;
  margin: 16px 0;
  background: var(--accent-dim);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: .9em;
  color: var(--text-secondary);
  font-style: italic;
}

/* ---------- Connection Line (for architecture diagrams) ---------- */
.connection {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px 0;
  color: var(--text-tertiary);
  font-size: .85em;
}

.connection .conn-line {
  width: 2px;
  height: 20px;
  background: var(--border);
  margin: 0 8px;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .card-grid.cols-3,
  .card-grid.cols-4 { grid-template-columns: 1fr 1fr; }

  .phase-timeline { grid-template-columns: 1fr 1fr; }

  .compare-row { grid-template-columns: 1fr; }

  #notes-panel {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 52px; /* leave nav-bar visible */
    width: 100%;
    max-width: 100%;
    border-left: none;
    border-top: 1px solid var(--border);
    z-index: 200;
    overflow-y: auto;
  }
  #notes-panel.mobile-visible { display: flex; }

  #slide-viewport { padding: 24px 20px; }

  .title-slide h1 { font-size: 2em; }
}

@media (max-width: 600px) {
  .card-grid.cols-2,
  .card-grid.cols-3,
  .card-grid.cols-4 { grid-template-columns: 1fr; }

  .phase-timeline { grid-template-columns: 1fr; }

  .flow-diagram { flex-direction: column; }
  .flow-arrow { transform: rotate(90deg); }

  /* 导航栏：隐藏 dots，放大按钮便于触控 */
  #nav-dots { display: none; }
  .nav-btn { width: 44px; height: 44px; }
  #nav-bar { gap: 12px; height: 60px; }

  /* 小屏备注 overlay 底部对齐 60px 导航栏 */
  #notes-panel { bottom: 60px; }

  /* 最后一页：取消最小高度，允许内容自然撑开并滚动 */
  .title-slide { min-height: unset; justify-content: flex-start; padding: 20px 0; gap: 12px; }
  .title-slide h1 { font-size: 1.8em; }
  .title-slide .subtitle { font-size: 1em; }

  /* 感谢聆听页外链卡片网格：小屏单列 */
  .title-slide [style*="grid-template-columns: 1fr 1fr"] {
    grid-template-columns: 1fr !important;
  }
}

/* ---------- Mermaid Diagrams ---------- */
.mermaid {
  background: transparent !important;
  font-family: var(--font-mono);
}

.mermaid svg {
  max-width: 100%;
  height: auto;
}

.mermaid .node rect,
.mermaid .node circle,
.mermaid .node ellipse,
.mermaid .node polygon {
  fill: var(--bg-card);
  stroke: var(--border);
  stroke-width: 1.5px;
}

.mermaid .node .label {
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 12px;
}

.mermaid .edgePath .path {
  stroke: var(--text-secondary);
  stroke-width: 1.5px;
}

.mermaid .edgeLabel {
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 11px;
}

.mermaid .cluster rect {
  fill: var(--bg-tertiary);
  stroke: var(--border);
  stroke-width: 1px;
}