:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface2: #242836;
  --surface3: #2d3248;
  --border: #2d3248;
  --border-light: #3a3f58;
  --text: #e8eaed;
  --text2: #9aa0b4;
  --text3: #6b7394;
  --accent: #4fc3f7;
  --accent2: #81d4fa;
  --accent-dim: rgba(79,195,247,.12);
  --green: #66bb6a;
  --green-dim: rgba(102,187,106,.12);
  --red: #ef5350;
  --red-dim: rgba(239,83,80,.12);
  --yellow: #ffd54f;
  --orange: #ffa726;
  --purple: #ab47bc;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,.4);
  --shadow-lg: 0 8px 40px rgba(0,0,0,.5);
  --transition: all .25s cubic-bezier(.4,0,.2,1);
}

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

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

/* ── SETUP PHASE ── */
.setup-container {
  max-width: 780px;
  margin: 0 auto;
  padding: 40px 24px;
}

.brand-header {
  text-align: center;
  margin-bottom: 40px;
}

.brand-header .brand-icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

.brand-header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-header p {
  color: var(--text2);
  font-size: .92rem;
  margin-top: 8px;
}

/* Cards */
.config-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}

.config-card h2 {
  font-size: .95rem;
  font-weight: 600;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: .78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--text2);
  margin-bottom: 6px;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 10px 14px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-size: .88rem;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.form-group textarea {
  min-height: 60px;
  resize: vertical;
}

.form-group .hint {
  font-size: .72rem;
  color: var(--text3);
  margin-top: 4px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }

.form-group input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  background: var(--surface3);
  border-radius: 3px;
  outline: none;
  border: none;
  cursor: pointer;
}

.form-group input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(79,195,247,.4);
}

/* Generate button */
.btn-generate {
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, var(--accent), #29b6f6);
  border: none;
  border-radius: var(--radius);
  color: #0f1117;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  letter-spacing: .3px;
}

.btn-generate:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(79,195,247,.3); }
.btn-generate:active { transform: translateY(0); }
.btn-generate:disabled { opacity: .5; cursor: not-allowed; transform: none; }

/* Progress */
.progress-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  display: none;
}

.progress-panel.active { display: block; }

.progress-panel h2 {
  font-size: .95rem;
  color: var(--accent);
  margin-bottom: 16px;
}

.progress-steps {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.progress-step {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: .85rem;
  transition: var(--transition);
}

.progress-step.pending { color: var(--text3); }
.progress-step.active { color: var(--accent); background: var(--accent-dim); }
.progress-step.done { color: var(--green); }
.progress-step.error { color: var(--red); }

.progress-step .step-icon { font-size: 1.1rem; width: 24px; text-align: center; }

.spinner-sm {
  width: 16px; height: 16px;
  border: 2px solid transparent;
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── VIEWER PHASE ── */
.viewer-container {
  display: none;
  height: 100vh;
  flex-direction: column;
  background: #000;
}

.viewer-container.active { display: flex; }

/* Toolbar */
.viewer-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  z-index: 10;
  flex-shrink: 0;
}

.toolbar-left, .toolbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.toolbar-title {
  font-size: .85rem;
  font-weight: 600;
  color: var(--text);
  max-width: 300px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.toolbar-counter {
  font-size: .8rem;
  color: var(--text2);
  padding: 4px 10px;
  background: var(--surface2);
  border-radius: 12px;
}

.toolbar-btn {
  padding: 6px 12px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: .78rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 5px;
}

.toolbar-btn:hover { border-color: var(--accent); color: var(--accent); }

/* Slide area */
.slide-viewport {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
  background: #0a0a0a;
}

.slide-frame {
  width: min(90vw, 1200px);
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #0f172a, #1e293b);
  border-radius: 8px;
  box-shadow: 0 20px 60px rgba(0,0,0,.6);
  padding: 48px 56px;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.slide-frame.has-image {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.slide-number {
  position: absolute;
  top: 16px;
  right: 20px;
  font-size: .7rem;
  color: rgba(255,255,255,.3);
  font-weight: 600;
}

.slide-title {
  font-size: clamp(1.2rem, 2.5vw, 2rem);
  font-weight: 700;
  color: #f8fafc;
  margin-bottom: 8px;
  line-height: 1.3;
}

.slide-accent-line {
  width: 60px;
  height: 4px;
  background: var(--accent);
  border-radius: 2px;
  margin-bottom: 24px;
}

.slide-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.slide-bullets li {
  font-size: clamp(.85rem, 1.4vw, 1.1rem);
  color: #cbd5e1;
  padding-left: 20px;
  position: relative;
  line-height: 1.6;
}

.slide-bullets li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

.slide-image-container {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  overflow: hidden;
}

.slide-image-container img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 8px;
}

.slide-image-credit {
  position: absolute;
  bottom: 12px;
  right: 20px;
  font-size: .65rem;
  color: rgba(255,255,255,.25);
  font-style: italic;
}

.slide-footer {
  position: absolute;
  bottom: 16px;
  left: 56px;
  font-size: .7rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Cover slide */
.slide-frame.cover {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px;
}

.slide-frame.cover .slide-title {
  font-size: clamp(1.5rem, 3.5vw, 2.8rem);
  margin-bottom: 16px;
}

.slide-frame.cover .slide-subtitle {
  font-size: clamp(.9rem, 1.8vw, 1.3rem);
  color: var(--accent);
  font-weight: 400;
}

/* Nav arrows */
.nav-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.12);
  color: #fff;
  font-size: 1.3rem;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5;
}

.nav-arrow:hover { background: rgba(79,195,247,.2); border-color: var(--accent); }
.nav-arrow.prev { left: 16px; }
.nav-arrow.next { right: 16px; }
.nav-arrow:disabled { opacity: .2; cursor: default; }

/* Notes panel */
.notes-panel {
  max-height: 200px;
  overflow-y: auto;
  padding: 16px 24px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  display: none;
  flex-shrink: 0;
}

.notes-panel.active { display: block; }

.notes-panel h3 {
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--text3);
  margin-bottom: 8px;
}

.notes-panel p {
  font-size: .85rem;
  color: var(--text2);
  line-height: 1.7;
}

/* Minimap */
.slide-minimap {
  display: flex;
  gap: 6px;
  padding: 8px 16px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  overflow-x: auto;
  justify-content: center;
  flex-shrink: 0;
}

.minimap-dot {
  width: 32px;
  height: 4px;
  border-radius: 2px;
  background: var(--surface3);
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}

.minimap-dot:hover { background: var(--text3); }
.minimap-dot.active { background: var(--accent); width: 48px; }

/* Export modal */
.export-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(0,0,0,.7);
  align-items: center;
  justify-content: center;
}

.export-modal.active { display: flex; }

.export-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  max-width: 500px;
  width: 90%;
  box-shadow: var(--shadow-lg);
}

.export-content h2 {
  font-size: 1.1rem;
  color: var(--accent);
  margin-bottom: 20px;
}

.export-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.export-btn {
  padding: 14px 20px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: .88rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  text-align: left;
  display: flex;
  align-items: center;
  gap: 10px;
}

.export-btn:hover { border-color: var(--accent); background: var(--accent-dim); }

.export-btn .export-icon { font-size: 1.2rem; }
.export-btn .export-info { font-size: .72rem; color: var(--text3); }

.export-close {
  margin-top: 16px;
  width: 100%;
  padding: 10px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text2);
  cursor: pointer;
  font-size: .85rem;
  transition: var(--transition);
}

.export-close:hover { border-color: var(--red); color: var(--red); }

/* Fullscreen overrides */
.viewer-container:fullscreen .viewer-toolbar { display: none; }
.viewer-container:fullscreen .slide-minimap { display: none; }
.viewer-container:fullscreen .notes-panel { display: none; }
.viewer-container:-webkit-full-screen .viewer-toolbar { display: none; }
.viewer-container:-webkit-full-screen .slide-minimap { display: none; }

/* Footer */
.footer {
  text-align: center;
  padding: 20px;
  color: var(--text3);
  font-size: .75rem;
  border-top: 1px solid var(--border);
  margin-top: 40px;
}

.hidden { display: none !important; }

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--surface3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text3); }