/* ============================================================
   Reactive Presentation - Dark Theme (16:9)
   ============================================================ */

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

:root {
  /* Palette */
  --bg-primary:    #0f1117;
  --bg-secondary:  #1a1d2e;
  --bg-tertiary:   #232740;
  --bg-card:       #1e2235;
  --surface:       #282d45;
  --border:        #2d3250;
  --border-focus:  #5b6abf;

  --text-primary:  #e8eaf0;
  --text-secondary:#9ba1b8;
  --text-muted:    #6b7194;
  --text-accent:   #7b8cff;

  --accent:        #6c5ce7;
  --accent-light:  #a29bfe;
  --accent-glow:   rgba(108, 92, 231, .3);

  --green:  #00b894;
  --green-bg: rgba(0, 184, 148, .15);
  --yellow: #fdcb6e;
  --yellow-bg: rgba(253, 203, 110, .15);
  --red:    #e17055;
  --red-bg: rgba(225, 112, 85, .15);
  --blue:   #74b9ff;
  --blue-bg: rgba(116, 185, 255, .15);
  --orange: #f39c12;
  --cyan:   #00cec9;
  --pink:   #fd79a8;

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

  /* Sizing */
  --slide-width:  1280px;
  --slide-height: 720px;

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow:   500ms ease;
}

/* --- Font Loading --- */
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/variable/pretendardvariable-dynamic-subset.min.css');
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&display=swap');

html, body {
  width: 100%; height: 100%;
  font-family: var(--font-main);
  background: var(--bg-primary);
  color: var(--text-primary);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* --- Slide Container --- */
.slide-deck {
  width: 100vw; height: 100vh;
  position: relative;
  overflow: hidden;
}

.slide {
  position: absolute;
  inset: 0;
  display: none;
  flex-direction: column;
  padding: 48px 64px;
  opacity: 0;
  transition: opacity var(--transition-normal);
}
.slide.active {
  display: flex;
  opacity: 1;
}
.slide.entering { display: flex; animation: fadeSlideIn .4s ease forwards; }
.slide.leaving  { display: flex; animation: fadeSlideOut .3s ease forwards; }

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateX(30px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes fadeSlideOut {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(-30px); }
}

/* --- Typography --- */
.slide h1 {
  font-size: 2.4rem; font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.2;
}
.slide h2 {
  font-size: 1.8rem; font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
}
.slide h3 {
  font-size: 1.3rem; font-weight: 600;
  color: var(--text-accent);
  margin-bottom: 8px;
}
.slide p, .slide li {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text-secondary);
}
.slide .subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

/* --- Layout Helpers --- */
.slide-header {
  margin-bottom: 24px;
}
.slide-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow-y: auto;
}
.columns { display: flex; gap: 32px; flex: 1; }
.columns > * { flex: 1; }
.col-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.col-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }
.center-content {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center; flex: 1;
}

/* --- Cards --- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.card:hover {
  border-color: var(--border-focus);
  box-shadow: 0 4px 20px rgba(0,0,0,.3);
}
.card.highlight {
  border-color: var(--accent);
  box-shadow: 0 0 20px var(--accent-glow);
}
.card-title {
  font-size: 1.1rem; font-weight: 600;
  color: var(--text-accent);
  margin-bottom: 8px;
}

/* --- Badges / Tags --- */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .02em;
}
.badge-green  { background: var(--green-bg);  color: var(--green); }
.badge-yellow { background: var(--yellow-bg); color: var(--yellow); }
.badge-red    { background: var(--red-bg);    color: var(--red); }
.badge-blue   { background: var(--blue-bg);   color: var(--blue); }

/* --- Buttons --- */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 18px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: .9rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.btn:hover { border-color: var(--accent); background: var(--surface); }
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent-light);
  border-color: var(--accent-light);
}
.btn-sm { padding: 5px 12px; font-size: .82rem; }
.btn-group { display: flex; gap: 8px; flex-wrap: wrap; }

/* --- Tabs --- */
.tab-bar {
  display: flex; gap: 4px;
  background: var(--bg-secondary);
  border-radius: 10px;
  padding: 4px;
  margin-bottom: 16px;
  width: fit-content;
}
.tab-btn {
  padding: 7px 16px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-main);
  font-size: .88rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.tab-btn.active {
  background: var(--accent);
  color: #fff;
}
.tab-content { display: none; }
.tab-content.active { display: block; }

/* --- Code Blocks --- */
.code-block {
  background: #0d1117;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 20px;
  font-family: var(--font-mono);
  font-size: .85rem;
  line-height: 1.65;
  color: #c9d1d9;
  overflow-x: auto;
  white-space: pre;
  position: relative;
}
.code-block .comment { color: #8b949e; }
.code-block .keyword { color: #ff7b72; }
.code-block .string  { color: #a5d6ff; }
.code-block .key     { color: #79c0ff; }
.code-block .value   { color: #7ee787; }
.code-block .number  { color: #fdcb6e; }
.code-label {
  position: absolute; top: 8px; right: 12px;
  font-size: .7rem;
  color: var(--text-muted);
  background: var(--bg-secondary);
  padding: 2px 8px;
  border-radius: 4px;
}

/* --- Canvas Container --- */
.canvas-container {
  position: relative;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}
.canvas-container canvas {
  display: block;
  width: 100%;
  height: 100%;
}
.canvas-controls {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  display: flex; gap: 8px;
  z-index: 10;
}

/* --- Progress Bar --- */
.progress-bar {
  position: fixed;
  bottom: 0; left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  transition: width var(--transition-normal);
  z-index: 1000;
}

/* --- Slide Counter --- */
.slide-counter {
  position: fixed;
  bottom: 12px; right: 20px;
  font-size: .8rem;
  color: var(--text-muted);
  z-index: 1000;
  font-family: var(--font-mono);
}

/* --- Navigation --- */
.nav-hint {
  position: fixed;
  bottom: 12px; left: 20px;
  font-size: .75rem;
  color: var(--text-muted);
  z-index: 1000;
  opacity: .6;
}

/* --- Lists --- */
.slide ul, .slide ol {
  padding-left: 24px;
}
.slide ul li, .slide ol li {
  margin-bottom: 6px;
}
.slide ul li::marker { color: var(--accent); }

/* Checklist */
.checklist { list-style: none; padding-left: 0; }
.checklist li {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  transition: background var(--transition-fast);
}
.checklist li:hover { background: var(--bg-tertiary); }
.checklist li .check {
  width: 20px; height: 20px;
  border: 2px solid var(--border);
  border-radius: 5px;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}
.checklist li.checked .check {
  background: var(--green);
  border-color: var(--green);
}
.checklist li.checked .check::after {
  content: '\2713';
  color: #fff;
  font-size: .75rem;
}

/* --- Tables --- */
.slide table {
  width: 100%;
  border-collapse: collapse;
  font-size: .92rem;
}
.slide th, .slide td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.slide th {
  color: var(--text-accent);
  font-weight: 600;
  font-size: .85rem;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.slide tr:hover td { background: var(--bg-tertiary); }

/* --- Callout Boxes --- */
.callout {
  padding: 14px 18px;
  border-radius: 10px;
  border-left: 4px solid;
  font-size: .95rem;
}
.callout-info    { border-color: var(--blue);   background: var(--blue-bg); }
.callout-warning { border-color: var(--yellow); background: var(--yellow-bg); }
.callout-danger  { border-color: var(--red);    background: var(--red-bg); }
.callout-success { border-color: var(--green);  background: var(--green-bg); }

/* --- Timeline --- */
.timeline {
  display: flex;
  align-items: center;
  gap: 0;
  padding: 12px 0;
}
.timeline-step {
  display: flex; flex-direction: column;
  align-items: center; text-align: center;
  flex: 1;
  position: relative;
}
.timeline-dot {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--bg-tertiary);
  border: 2px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: .75rem; font-weight: 700;
  color: var(--text-muted);
  z-index: 1;
  transition: all var(--transition-normal);
}
.timeline-step.active .timeline-dot {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 0 12px var(--accent-glow);
}
.timeline-step.done .timeline-dot {
  background: var(--green);
  border-color: var(--green);
  color: #fff;
}
.timeline-label {
  margin-top: 8px;
  font-size: .78rem;
  color: var(--text-muted);
  max-width: 100px;
}
.timeline-connector {
  flex: 1;
  height: 2px;
  background: var(--border);
  margin: 0 -4px;
  position: relative;
  top: -16px;
}
.timeline-connector.done { background: var(--green); }

/* --- Slider --- */
.slider-container {
  display: flex; align-items: center; gap: 12px;
}
input[type="range"] {
  -webkit-appearance: none;
  height: 6px;
  border-radius: 3px;
  background: var(--border);
  outline: none;
  flex: 1;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
}
.slider-value {
  font-family: var(--font-mono);
  font-size: .9rem;
  color: var(--accent-light);
  min-width: 60px;
  text-align: right;
}

/* --- Metric Cards --- */
.metric-card {
  text-align: center;
  padding: 16px;
}
.metric-value {
  font-size: 2rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--accent-light);
}
.metric-label {
  font-size: .82rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* --- Event Log --- */
.event-log {
  background: #0d1117;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  font-family: var(--font-mono);
  font-size: .78rem;
  line-height: 1.6;
  max-height: 240px;
  overflow-y: auto;
  color: var(--text-secondary);
}
.event-log .timestamp { color: var(--text-muted); }
.event-log .event-info   { color: var(--blue); }
.event-log .event-warn   { color: var(--yellow); }
.event-log .event-error  { color: var(--red); }
.event-log .event-ok     { color: var(--green); }

/* --- Title Slide --- */
.title-slide {
  justify-content: center;
  align-items: center;
  text-align: center;
}
.title-slide h1 {
  font-size: 3rem;
  background: linear-gradient(135deg, var(--accent-light), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
}
.title-slide .subtitle {
  font-size: 1.3rem;
  color: var(--text-secondary);
}
.title-slide .meta {
  margin-top: 32px;
  font-size: .9rem;
  color: var(--text-muted);
}

/* --- Pain Point Slide --- */
.pain-quote {
  font-size: 1.2rem;
  font-style: italic;
  color: var(--yellow);
  border-left: 3px solid var(--yellow);
  padding: 12px 20px;
  background: var(--yellow-bg);
  border-radius: 0 10px 10px 0;
  margin: 12px 0;
}

/* --- Comparison Toggle --- */
.compare-toggle {
  display: flex; gap: 0;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border);
  margin-bottom: 16px;
  width: fit-content;
}
.compare-btn {
  padding: 10px 24px;
  border: none;
  background: var(--bg-tertiary);
  color: var(--text-muted);
  font-family: var(--font-main);
  font-size: .9rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.compare-btn.active {
  background: var(--accent);
  color: #fff;
}

/* --- Node Grid (for dashboard sim) --- */
.node-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(48px, 1fr));
  gap: 6px;
}
.node-cell {
  aspect-ratio: 1;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: .7rem; font-weight: 700;
  transition: all var(--transition-normal);
  cursor: default;
}
.node-ready       { background: var(--green-bg); border: 1px solid var(--green); color: var(--green); }
.node-cordoned    { background: var(--yellow-bg); border: 1px solid var(--yellow); color: var(--yellow); }
.node-terminating { background: var(--red-bg); border: 1px solid var(--red); color: var(--red); animation: pulse 1.5s infinite; }
.node-empty       { background: var(--bg-tertiary); border: 1px solid var(--border); color: var(--text-muted); }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: .5; }
}

/* --- Fullscreen --- */
.slide-deck:-webkit-full-screen { background: var(--bg-primary); }
.slide-deck:fullscreen          { background: var(--bg-primary); }

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* --- Responsive (projector safe) --- */
@media (max-width: 1024px) {
  .slide { padding: 32px 40px; }
  .slide h1 { font-size: 2rem; }
  .title-slide h1 { font-size: 2.4rem; }
}

/* --- Print --- */
@media print {
  .slide { page-break-after: always; position: relative; display: flex !important; opacity: 1 !important; }
  .progress-bar, .slide-counter, .nav-hint { display: none; }
}