:root {
  --bg: #12141a;
  --panel: #1b1e27;
  --panel-2: #21242e;
  --border: #2c3040;
  --text: #ededef;
  --muted: #8a8f9c;
  --mv: #e8a33d;
  --travel: #3fa9a4;
  --accent: var(--mv);
  --danger: #d9634a;
  --radius: 10px;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', 'Noto Sans Myanmar', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.5;
}

.app { display: flex; min-height: 100vh; }

.rail {
  width: 260px;
  flex-shrink: 0;
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 20px 16px;
  gap: 20px;
}
.rail-brand {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-display); font-weight: 700; letter-spacing: 0.08em;
  font-size: 13px;
}
.rail-brand-mark { color: var(--accent); }

.mode-switch { display: flex; flex-direction: column; gap: 6px; }
.mode-btn {
  display: flex; align-items: center; gap: 10px;
  background: transparent; border: 1px solid var(--border);
  color: var(--muted); padding: 10px 12px; border-radius: var(--radius);
  cursor: pointer; font-family: var(--font-body); font-size: 13px;
  text-align: left; transition: all .15s ease;
}
.mode-btn:hover { border-color: var(--accent); color: var(--text); }
.mode-btn.active { background: var(--panel-2); color: var(--text); border-color: var(--accent); }
.mode-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.mode-dot.mv { background: var(--mv); }
.mode-dot.travel { background: var(--travel); }

.rail-section-label {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.1em;
  color: var(--muted); margin-top: 8px;
}
.library-list { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 6px; }
.library-empty { color: var(--muted); font-size: 12px; padding: 8px 0; }
.library-item {
  background: var(--panel-2); border: 1px solid var(--border); border-left: 3px solid var(--accent);
  border-radius: 6px; padding: 8px 10px; cursor: pointer; font-size: 12px;
}
.library-item:hover { border-color: var(--accent); }
.library-item .lib-title { font-weight: 600; }
.library-item .lib-meta { color: var(--muted); font-family: var(--font-mono); font-size: 10px; margin-top: 2px; }

.settings-btn {
  background: transparent; border: 1px solid var(--border); color: var(--muted);
  border-radius: var(--radius); padding: 10px; cursor: pointer; font-size: 13px;
}
.settings-btn:hover { color: var(--text); border-color: var(--accent); }

.main { flex: 1; padding: 28px 36px 60px; max-width: 980px; }
.topbar { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 20px; }
.topbar h1 { font-family: var(--font-display); font-size: 22px; margin: 0; }
.timecode { font-family: var(--font-mono); color: var(--muted); font-size: 12px; }

.form-panel {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; display: flex; flex-direction: column; gap: 18px;
}
.field-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.field-grid.controls-row { grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--border); padding-top: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field.wide { grid-column: 1 / -1; }
.field span { font-size: 11px; color: var(--muted); font-family: var(--font-mono); letter-spacing: .03em; }
.field input[type=text], .field input[type=number], .field select, .field textarea {
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 6px;
  color: var(--text); padding: 9px 10px; font-family: var(--font-body); font-size: 13px; resize: vertical;
}
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--accent); }
.checkbox-field { flex-direction: row; align-items: center; gap: 8px; }
.checkbox-field input { width: 16px; height: 16px; }

.action-row { display: flex; gap: 10px; }
.btn-primary, .btn-secondary, .btn-ghost {
  font-family: var(--font-body); font-weight: 600; font-size: 13px;
  border-radius: 8px; padding: 10px 18px; cursor: pointer; border: 1px solid transparent;
}
.btn-primary { background: var(--accent); color: #16171b; }
.btn-primary:hover { filter: brightness(1.08); }
.btn-secondary { background: transparent; border-color: var(--border); color: var(--text); }
.btn-secondary:disabled { color: var(--muted); cursor: not-allowed; }
.btn-ghost { background: transparent; border-color: var(--border); color: var(--muted); font-weight: 500; }
.btn-ghost:hover { color: var(--text); border-color: var(--accent); }

.result-panel {
  margin-top: 20px; background: var(--panel); border: 1px solid var(--border);
  border-left: 3px solid var(--accent); border-radius: var(--radius); padding: 20px;
}
.result-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.result-header > span { font-family: var(--font-mono); font-size: 11px; color: var(--muted); letter-spacing: .1em; }
.result-content {
  white-space: pre-wrap; font-family: var(--font-body); font-size: 13.5px; line-height: 1.7;
  background: var(--panel-2); border-radius: 8px; padding: 16px; max-height: 480px; overflow-y: auto;
}
.visual-prompt-box, .upload-box {
  margin-top: 16px; border-top: 1px solid var(--border); padding-top: 14px;
}
.vp-label { font-family: var(--font-mono); font-size: 10px; color: var(--muted); letter-spacing: .05em; margin-bottom: 8px; }
.vp-text {
  width: 100%; background: var(--panel-2); border: 1px solid var(--border); border-radius: 6px;
  color: var(--text); padding: 10px; font-family: var(--font-body); font-size: 13px; margin-bottom: 8px;
}
.vp-actions { display: flex; gap: 8px; }
.upload-hint { color: var(--muted); font-size: 11px; margin-top: 4px; }
.ref-thumbs { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.ref-thumbs img { width: 80px; height: 80px; object-fit: cover; border-radius: 6px; border: 1px solid var(--border); }

.modal-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,.6);
  display: flex; align-items: center; justify-content: center; z-index: 50;
}
.modal {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; width: 420px; display: flex; flex-direction: column; gap: 14px;
}
.modal h2 { font-family: var(--font-display); margin: 0 0 4px; font-size: 18px; }
.modal-note { font-size: 11px; color: var(--muted); line-height: 1.6; }
.modal-note code { color: var(--accent); }

@media (max-width: 800px) {
  .app { flex-direction: column; }
  .rail { width: 100%; }
  .field-grid, .field-grid.controls-row { grid-template-columns: 1fr; }
}