:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1e222b;
  --border: #262c37;
  --text: #e6e8ee;
  --muted: #8b93a3;
  --accent: #4ea1ff;
  --accent-dim: #2a5a99;
  --danger: #e5484d;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
}

header {
  display: flex; align-items: center; gap: 16px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}
header h1 { font-size: 15px; margin: 0; font-weight: 600; }
header nav { display: flex; gap: 12px; }
header nav a {
  color: var(--muted); text-decoration: none; padding: 4px 8px; border-radius: 6px;
}
header nav a:hover { color: var(--text); background: var(--panel-2); }
header nav a.active { color: var(--text); background: var(--panel-2); }
header .spacer { flex: 1; }

button, .btn {
  background: var(--accent-dim); color: white; border: 1px solid transparent;
  padding: 6px 12px; border-radius: 6px; cursor: pointer; font: inherit;
}
button:hover, .btn:hover { background: var(--accent); }
button:disabled { opacity: 0.5; cursor: not-allowed; }
button.ghost { background: transparent; border-color: var(--border); color: var(--text); }
button.ghost:hover { background: var(--panel-2); }
button.danger { background: transparent; border-color: var(--danger); color: var(--danger); }
button.danger:hover { background: var(--danger); color: white; }

input, select, textarea {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  padding: 6px 10px; border-radius: 6px; font: inherit;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); }

/* ---------- gallery (index) ---------- */
.split {
  display: grid;
  grid-template-columns: 380px 1fr;
  height: calc(100vh - 49px);
}
.list-pane {
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  min-height: 0;
}
.list-toolbar {
  padding: 10px; display: flex; gap: 8px; align-items: center;
  border-bottom: 1px solid var(--border);
}
.list-toolbar input[type="search"] { flex: 1; }
.list {
  flex: 1; overflow: auto;
}
.file-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px 12px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
}
.file-row:hover { background: var(--panel-2); }
.file-row.active { background: var(--accent-dim); }
.file-row .name {
  grid-column: 1 / 2;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  font-weight: 500;
}
.file-row .size {
  grid-column: 2 / 3;
  color: var(--muted); font-size: 12px; text-align: right;
}
.file-row .date {
  grid-column: 1 / 3;
  color: var(--muted); font-size: 12px;
}
.file-row.folder-row .name { color: var(--accent); }
.file-row.folder-row .date { color: var(--muted); font-style: italic; }

.folder-bar {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 8px;
  min-height: 40px; flex-wrap: wrap;
}
.folder-label { color: var(--muted); font-size: 12px; }
.crumbs { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.crumb {
  background: transparent; border: 1px solid transparent;
  color: var(--text); padding: 2px 6px; border-radius: 4px;
  font-size: 12px; cursor: pointer;
}
.crumb:hover { background: var(--panel-2); }
.crumb.new-folder { color: var(--accent); border-color: var(--border); margin-left: 4px; }
.crumb-sep { color: var(--muted); font-size: 12px; }

.drop-target { display: block; font-size: 11px; color: var(--accent); margin-top: 4px; }

.preview-pane {
  display: flex; flex-direction: column;
  min-height: 0;
  background: var(--bg);
}
.preview-toolbar {
  padding: 10px 16px; display: flex; gap: 8px; align-items: center;
  border-bottom: 1px solid var(--border); background: var(--panel);
  min-height: 47px;
}
.preview-toolbar .meta { color: var(--muted); font-size: 12px; margin-right: auto; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.dl-group {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}
.dl-group button {
  border-radius: 0;
  border: none;
  border-right: 1px solid var(--border);
  padding: 6px 10px;
  font-size: 12px;
}
.dl-group button:last-child { border-right: none; }
.preview-body {
  flex: 1; overflow: auto; padding: 16px;
  display: flex; align-items: center; justify-content: center;
  background:
    linear-gradient(45deg, #14171d 25%, transparent 25%) 0 0/20px 20px,
    linear-gradient(-45deg, #14171d 25%, transparent 25%) 0 10px/20px 20px,
    linear-gradient(45deg, transparent 75%, #14171d 75%) 10px -10px/20px 20px,
    linear-gradient(-45deg, transparent 75%, #14171d 75%) -10px 0/20px 20px,
    var(--bg);
}
.preview-body img, .preview-body video {
  max-width: 100%; max-height: 100%;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  border-radius: 4px;
  background: white;
}
.preview-body .empty { color: var(--muted); }

/* ---------- upload drop zone ---------- */
.drop {
  border: 2px dashed var(--border); border-radius: 8px;
  padding: 12px; text-align: center; color: var(--muted); margin: 10px;
  cursor: pointer;
}
.drop.hover { border-color: var(--accent); color: var(--text); }

/* ---------- generate page ---------- */
.gen-wrap {
  display: grid; grid-template-columns: 360px 1fr;
  height: calc(100vh - 49px);
}
.gen-form {
  padding: 16px; border-right: 1px solid var(--border);
  display: flex; flex-direction: column; gap: 12px;
  overflow: auto;
}
.gen-form label { display: block; font-size: 12px; color: var(--muted); margin-bottom: 4px; }
.gen-form textarea { width: 100%; min-height: 120px; resize: vertical; }
.gen-form select, .gen-form input[type="number"], .gen-form input[type="text"] { width: 100%; }
.gen-form #dynFields { display: flex; flex-direction: column; gap: 12px; }
.gen-form .row { display: flex; gap: 8px; }
.gen-form .row > * { flex: 1; }

.gen-preview {
  padding: 16px; display: flex; flex-direction: column; align-items: center; justify-content: center;
  min-height: 0;
  background:
    linear-gradient(45deg, #14171d 25%, transparent 25%) 0 0/20px 20px,
    linear-gradient(-45deg, #14171d 25%, transparent 25%) 0 10px/20px 20px,
    linear-gradient(45deg, transparent 75%, #14171d 75%) 10px -10px/20px 20px,
    linear-gradient(-45deg, transparent 75%, #14171d 75%) -10px 0/20px 20px,
    var(--bg);
}
.gen-preview img { max-width: 100%; max-height: 100%; border-radius: 4px; box-shadow: 0 10px 30px rgba(0,0,0,0.5); }
.gen-preview .msg { color: var(--muted); text-align: center; }

.spinner {
  width: 32px; height: 32px; border-radius: 50%;
  border: 3px solid var(--border); border-top-color: var(--accent);
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.toast {
  position: fixed; bottom: 16px; left: 50%; transform: translateX(-50%);
  background: var(--panel-2); border: 1px solid var(--border);
  padding: 8px 16px; border-radius: 6px; z-index: 100;
}

/* ---------- login dialog ---------- */
dialog {
  background: var(--panel); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 20px; width: min(360px, 90vw);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
dialog::backdrop { background: rgba(0,0,0,0.5); }
dialog h3 { font-size: 15px; font-weight: 600; }
dialog input[type="password"] { width: 100%; margin-bottom: 8px; }
dialog .err { color: var(--danger); font-size: 12px; min-height: 16px; margin-bottom: 8px; }
dialog .actions { display: flex; justify-content: flex-end; gap: 8px; }