:root {
  --bg-dark: #070a13;
  --panel-bg: #0d1322;
  --panel-alt: #131b2e;
  --card-bg: #18233c;
  --card-hover: #1e2c4a;
  --border-color: #24324f;
  --border-highlight: #38bdf8;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --accent: #f59e0b;
  --accent-cyan: #38bdf8;
  --accent-emerald: #10b981;
  --accent-purple: #c084fc;
  --accent-orange: #fb923c;
  --accent-rose: #f43f5e;
}

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

body, html {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
}

.sd-app {
  display: flex;
  flex-direction: column;
  width: 100vw;
  height: 100vh;
}

/* Top Navigation Bar */
.sd-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 52px;
  padding: 0 16px;
  background-color: var(--panel-bg);
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
  z-index: 50;
}

.sd-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
}

.sd-brand-badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(245, 158, 11, 0.18);
  border: 1px solid rgba(245, 158, 11, 0.4);
  color: var(--accent);
}

.sd-project-tag {
  font-size: 0.75rem;
  font-family: monospace;
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.12);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid rgba(56, 189, 248, 0.25);
}

.sd-nav-tools {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  background: var(--card-bg);
  color: var(--text-main);
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
}
.btn:hover {
  background: var(--card-hover);
  border-color: var(--accent-cyan);
}
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.btn-primary {
  background: linear-gradient(135deg, #d97706, #b45309);
  border-color: #f59e0b;
  color: #fff;
}
.btn-primary:hover {
  background: linear-gradient(135deg, #f59e0b, #d97706);
}
.btn-cyan {
  background: linear-gradient(135deg, #0284c7, #0369a1);
  border-color: #38bdf8;
  color: #fff;
}
.btn-cyan:hover {
  background: linear-gradient(135deg, #38bdf8, #0284c7);
}
.btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--text-muted);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-main);
}
.btn-small {
  padding: 3px 8px;
  font-size: 0.72rem;
}
.btn-full {
  width: 100%;
}

/* Three-column Workspace */
.sd-workspace {
  display: grid;
  grid-template-columns: 340px 1fr 340px;
  flex: 1;
  overflow: hidden;
}

/* Panels */
.sd-panel {
  display: flex;
  flex-direction: column;
  background: var(--panel-bg);
  border-right: 1px solid var(--border-color);
  overflow: hidden;
}
.sd-panel:last-child {
  border-right: none;
  border-left: 1px solid var(--border-color);
}

.sd-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  background: var(--panel-alt);
  border-bottom: 1px solid var(--border-color);
  flex-shrink: 0;
}
.sd-panel-title {
  font-size: 0.85rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
}
.sd-panel-hint {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.sd-panel-body {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Form Controls */
.sd-form-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.sd-label {
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.sd-input, .sd-select, .sd-textarea {
  width: 100%;
  font-size: 0.82rem;
  background: #090e1a;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-main);
  padding: 7px 10px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s;
}
.sd-input:focus, .sd-select:focus, .sd-textarea:focus {
  border-color: var(--accent-cyan);
}
.sd-textarea {
  resize: vertical;
  line-height: 1.45;
}
.sd-monospace {
  font-family: "Consolas", "Courier New", monospace;
  font-size: 0.76rem;
}

/* Collapsible */
.sd-collapsible {
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background: #090e1a;
  overflow: hidden;
}
.sd-collapsible-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  cursor: pointer;
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--text-muted);
  background: rgba(255,255,255,0.02);
}
.sd-collapsible-header:hover {
  color: var(--text-main);
}
.sd-collapsible-body {
  padding: 10px;
  border-top: 1px solid var(--border-color);
}

/* Director Log & Summaries */
.sd-log {
  background: #050811;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 0.74rem;
  font-family: monospace;
  color: var(--accent-cyan);
  max-height: 100px;
  overflow-y: auto;
  line-height: 1.4;
  white-space: pre-wrap;
}

.sd-summary-box {
  background: #090e1a;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.sd-summary-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.74rem;
  padding: 4px 8px;
  border-radius: 4px;
  background: rgba(255,255,255,0.04);
}

/* Second Layer: Asset Cards (Left) */
.sd-asset-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: relative;
  transition: border-color 0.2s;
}
.sd-asset-card:hover {
  border-color: rgba(56, 189, 248, 0.4);
}
.sd-asset-card[data-type="character"] {
  border-left: 3px solid var(--accent-purple);
}
.sd-asset-card[data-type="scene"] {
  border-left: 3px solid var(--accent-emerald);
}
.sd-asset-card[data-type="prop"] {
  border-left: 3px solid var(--accent-orange);
}

.sd-asset-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.sd-asset-id-badge {
  font-family: monospace;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
}
.sd-asset-id-badge.character {
  background: rgba(192, 132, 252, 0.15);
  color: var(--accent-purple);
  border: 1px solid rgba(192, 132, 252, 0.3);
}
.sd-asset-id-badge.scene {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.3);
}
.sd-asset-id-badge.prop {
  background: rgba(251, 146, 60, 0.15);
  color: var(--accent-orange);
  border: 1px solid rgba(251, 146, 60, 0.3);
}

.sd-asset-title {
  font-size: 0.82rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 4px;
}

.sd-asset-preview {
  width: 100%;
  aspect-ratio: 1;
  background: #090e1a;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.sd-asset-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.sd-asset-placeholder {
  font-size: 2.2rem;
  opacity: 0.35;
}

.sd-asset-prompt-box {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.sd-asset-prompt-box textarea {
  font-size: 0.74rem;
  min-height: 52px;
  padding: 6px;
}

.sd-asset-lora-row {
  display: grid;
  grid-template-columns: 1fr 65px;
  gap: 6px;
}

.sd-asset-actions {
  display: flex;
  gap: 6px;
  align-items: center;
}

.sd-asset-status {
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* Third Layer: Shot Cards (Center Canvas) */
.sd-shot-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: all 0.2s;
}
.sd-shot-card:hover {
  border-color: rgba(56, 189, 248, 0.5);
  box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}

.sd-shot-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding-bottom: 8px;
}
.sd-shot-title-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.sd-shot-id {
  font-family: monospace;
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--accent);
}
.sd-shot-badges {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}
.sd-chip {
  font-size: 0.68rem;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.2);
  color: var(--accent-cyan);
}
.sd-chip-time {
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.2);
  color: var(--accent);
}

.sd-shot-summary {
  font-size: 0.82rem;
  line-height: 1.4;
  color: #cbd5e1;
  background: rgba(0,0,0,0.25);
  padding: 6px 10px;
  border-radius: 6px;
  border-left: 2px solid var(--accent-cyan);
}

/* First Frame Row */
.sd-ff-row {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  background: #090e1a;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 8px;
}
.sd-ff-thumb {
  width: 90px;
  height: 65px;
  background: #060912;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.sd-ff-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.sd-ff-thumb-placeholder {
  font-size: 1.4rem;
  opacity: 0.4;
}
.sd-ff-controls {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* Video Prompt & Expanded Preview */
.sd-prompt-box {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.sd-prompt-box textarea {
  font-size: 0.78rem;
  min-height: 65px;
}
.sd-prompt-preview {
  display: none;
  font-size: 0.72rem;
  color: var(--text-muted);
  background: #060912;
  border: 1px dashed var(--border-color);
  border-radius: 6px;
  padding: 6px 8px;
  line-height: 1.4;
}
.sd-prompt-preview.visible {
  display: block;
}
.sd-prompt-preview strong {
  color: var(--accent-cyan);
}

/* Video Controls & Render */
.sd-shot-footer {
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}
.sd-model-controls {
  display: flex;
  gap: 6px;
  align-items: center;
  flex: 1;
}

.sd-progress {
  display: none;
  width: 100%;
  flex-direction: column;
  gap: 4px;
}
.sd-prog-track {
  width: 100%;
  height: 5px;
  background: #090e1a;
  border-radius: 3px;
  overflow: hidden;
}
.sd-prog-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #38bdf8, #f59e0b);
  transition: width 0.25s ease;
}
.sd-prog-text {
  font-size: 0.7rem;
  color: var(--accent-cyan);
  font-family: monospace;
}

.sd-video-player {
  width: 100%;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: #000;
  display: none;
  max-height: 380px;
}
.sd-video-player.visible {
  display: block;
}

/* Modal */
.sd-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
}
.sd-modal-backdrop.visible {
  display: flex;
}
.sd-modal {
  background: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  width: 500px;
  max-width: 90vw;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 10px 30px rgba(0,0,0,0.6);
}
.sd-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  font-weight: 700;
}
.sd-modal-body {
  padding: 16px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.sd-project-item {
  padding: 10px 12px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: border-color 0.15s;
}
.sd-project-item:hover {
  border-color: var(--accent-cyan);
  background: var(--card-hover);
}
.sd-project-item-title {
  font-size: 0.86rem;
  font-weight: 600;
}
.sd-project-item-sub {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: monospace;
}

.sd-empty-state {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  padding: 60px 20px;
}

/* RWD 補強 (2026-09-24):手機寬度下頂部列換行 */
@media (max-width: 720px) {
  .sd-topbar { height: auto; flex-wrap: wrap; gap: 6px; padding: 6px 10px; }
  .sd-brand, .sd-nav-tools { flex-wrap: wrap; gap: 6px; min-width: 0; }
}

/* 手機版三分頁流程 (2026-09-30):劇本／資產／分鏡,一次只顯示一個 panel */
.sd-mobile-steps { display: none; }

@media (max-width: 720px) {
  .sd-mobile-steps {
    display: flex;
    gap: 6px;
    padding: 6px 8px;
    background: var(--panel-alt);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
  }
  .sd-mobile-step {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    font-family: inherit;
    font-size: 0.78rem;
    font-weight: 600;
    padding: 8px 4px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--card-bg);
    color: var(--text-muted);
    cursor: pointer;
  }
  .sd-mobile-step.active {
    background: linear-gradient(135deg, #d97706, #b45309);
    border-color: #f59e0b;
    color: #fff;
  }

  /* 三欄 grid → 單欄,靠 JS 切換的 .mobile-hidden 決定當下顯示哪一個 panel */
  .sd-workspace {
    grid-template-columns: 1fr;
  }
  .sd-panel {
    border-right: none;
    border-left: none;
  }
  .sd-panel.mobile-hidden {
    display: none;
  }
}