/* ============ RESET & VARIJABLE ============ */
* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0f1420;
  --bg-panel: #161c2b;
  --bg-elev: #1e2536;
  --bg-hover: #252d42;
  --border: #2a3348;
  --border-soft: #1f2739;
  --text: #e4e8f0;
  --text-dim: #8b95ad;
  --text-faint: #5a6580;
  --accent: #4d8dff;
  --accent-hover: #6ba0ff;
  --success: #2ecc71;
  --success-hover: #48d685;
  --warning: #f5a623;
  --danger: #e74c3c;
  --mono: 'Cascadia Code', 'Consolas', 'Monaco', monospace;
}

html, body {
  height: 100%;
  font-family: -apple-system, 'Segoe UI', Roboto, sans-serif;
  font-size: 13px;
  color: var(--text);
  background: var(--bg);
  overflow: hidden;
  user-select: none;
}

body {
  display: flex;
  flex-direction: column;
}

/* ============ TOPBAR ============ */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.brand { display: flex; align-items: center; gap: 12px; }
.logo { font-size: 26px; }
.title { font-size: 15px; font-weight: 600; letter-spacing: 0.3px; }
.subtitle { font-size: 11px; color: var(--text-dim); margin-top: 2px; }

.actions { display: flex; gap: 8px; }

/* ============ BUTTONS ============ */
.btn {
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-elev);
  color: var(--text);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.btn:hover:not(:disabled) { background: var(--bg-hover); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
  font-weight: 500;
}
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); border-color: var(--accent-hover); }

.btn-success {
  background: var(--success);
  border-color: var(--success);
  color: #0a1a10;
  font-weight: 600;
}
.btn-success:hover:not(:disabled) { background: var(--success-hover); border-color: var(--success-hover); }

.btn-sm { padding: 4px 10px; font-size: 11px; }

/* ============ LAYOUT ============ */
.layout {
  flex: 1;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1px;
  background: var(--border);
  min-height: 0;
  overflow: hidden;
}

.panel {
  background: var(--bg-panel);
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.3px;
  color: var(--text);
  text-transform: uppercase;
  flex-shrink: 0;
}

.stats {
  font-size: 11px;
  color: var(--text-dim);
  font-weight: 400;
  text-transform: none;
}

.toolbar {
  display: flex;
  gap: 6px;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border-soft);
  flex-shrink: 0;
  align-items: center;
}

.toolbar input {
  flex: 1;
  padding: 5px 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text);
  font-family: var(--mono);
  font-size: 11px;
  outline: none;
}
.toolbar input:focus { border-color: var(--accent); }

/* ============ TREE ============ */
.tree {
  flex: 1;
  overflow-y: auto;
  padding: 4px 0;
  user-select: text;
}

.tree::-webkit-scrollbar { width: 10px; }
.tree::-webkit-scrollbar-track { background: transparent; }
.tree::-webkit-scrollbar-thumb { background: var(--border); border-radius: 5px; }
.tree::-webkit-scrollbar-thumb:hover { background: #3a465e; }

.row {
  display: flex;
  align-items: center;
  padding: 3px 10px;
  font-family: var(--mono);
  font-size: 12px;
  cursor: pointer;
  line-height: 1.5;
  border-left: 2px solid transparent;
}
.row:hover { background: var(--bg-elev); }
.row.is-file { padding-left: 24px; }
.row.is-folder { font-weight: 600; }

.row input[type="checkbox"] {
  margin-right: 8px;
  width: 14px;
  height: 14px;
  cursor: pointer;
  accent-color: var(--accent);
  flex-shrink: 0;
}

.row .icon { margin-right: 6px; flex-shrink: 0; }
.row .name { flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.row .size { color: var(--text-faint); font-size: 11px; margin-left: 8px; flex-shrink: 0; }

.row.is-secret { color: var(--danger); }
.row.is-secret .name::after { content: " ⚠️"; }
.row.is-binary { color: var(--text-faint); }

.empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-dim);
}
.empty-icon { font-size: 48px; opacity: 0.4; margin-bottom: 12px; }

/* ============ PREVIEW ============ */
.preview {
  flex: 1;
  overflow-y: auto;
  padding: 10px;
}

.preview::-webkit-scrollbar { width: 10px; }
.preview::-webkit-scrollbar-track { background: transparent; }
.preview::-webkit-scrollbar-thumb { background: var(--border); border-radius: 5px; }

.group {
  background: var(--bg-elev);
  border: 1px solid var(--border-soft);
  border-radius: 6px;
  padding: 10px 12px;
  margin-bottom: 8px;
}

.group-name {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 4px;
}

.group-stats {
  font-size: 11px;
  color: var(--text-dim);
}

.group-stats .warn { color: var(--warning); }
.group-stats .danger { color: var(--danger); }

/* ============ STATUS BAR ============ */
.statusbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 14px;
  background: var(--bg-panel);
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-dim);
  flex-shrink: 0;
}

#progress { font-family: var(--mono); }