:root {
  --bg: #0f1419;
  --panel: #1a2230;
  --panel-2: #222d3d;
  --border: #2d3a4f;
  --text: #e6edf3;
  --muted: #8b98a9;
  --accent: #4a9eff;
  --accent-hover: #6db0ff;
  --danger: #ff6b6b;
  --success: #51d88a;
  --admin: #ffb84a;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}
.container { max-width: 1100px; margin: 0 auto; padding: 24px; }

header {
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  padding: 14px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
header h1 { margin: 0; font-size: 18px; font-weight: 600; }
header .brand-tag { color: var(--accent); }
.user-info { display: flex; align-items: center; gap: 12px; font-size: 14px; }
.user-info .email { color: var(--muted); }
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 600;
  background: var(--admin);
  color: #1a1a1a;
}
button {
  background: var(--accent);
  color: white;
  border: none;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
  font-weight: 500;
  transition: background 0.15s;
}
button:hover { background: var(--accent-hover); }
button.secondary {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
button.secondary:hover { background: var(--panel-2); }

.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-card {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 40px;
  border-radius: 12px;
  width: 100%;
  max-width: 420px;
  text-align: center;
}
.login-card h2 { margin: 0 0 8px 0; }
.login-card p { color: var(--muted); margin: 0 0 24px 0; font-size: 14px; }
.login-card button { width: 100%; padding: 12px; }
.google-btn {
  background: white;
  color: #1a1a1a;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}
.google-btn:hover { background: #f0f0f0; }
.login-error {
  margin-top: 16px;
  padding: 10px 12px;
  background: rgba(255,107,107,0.1);
  border: 1px solid rgba(255,107,107,0.3);
  color: var(--danger);
  border-radius: 6px;
  font-size: 13px;
  text-align: left;
}
.login-foot {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--muted);
}

.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 24px;
}
.tab {
  padding: 10px 18px;
  background: transparent;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 14px;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  font-weight: 500;
}
.tab:hover { color: var(--text); background: transparent; }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }
.tab.admin-tab { color: var(--admin); }
.tab.admin-tab.active { border-bottom-color: var(--admin); }

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  font-size: 14px;
  color: var(--muted);
}
.breadcrumb .crumb {
  color: var(--accent);
  cursor: pointer;
  text-decoration: none;
}
.breadcrumb .crumb:hover { text-decoration: underline; }
.breadcrumb .sep { color: var(--border); }

.file-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.file-table th {
  text-align: left;
  padding: 12px 16px;
  background: var(--panel-2);
  color: var(--muted);
  font-weight: 500;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border);
}
.file-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.file-table tr:last-child td { border-bottom: none; }
.file-table tr:hover td { background: var(--panel-2); }
.file-table .name {
  display: flex;
  align-items: center;
  gap: 10px;
}
.file-table .icon { font-size: 18px; }
.file-table .folder-row { cursor: pointer; }
.file-table .folder-row .name { color: var(--accent); font-weight: 500; }
.file-table .size, .file-table .modified { color: var(--muted); white-space: nowrap; }
.file-table .actions { text-align: right; white-space: nowrap; }
.download-btn {
  padding: 6px 12px;
  font-size: 13px;
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
}
.download-btn:hover { background: var(--accent); color: white; }
.download-btn:disabled { opacity: 0.5; cursor: wait; }

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

.admin-banner {
  background: rgba(255, 184, 74, 0.1);
  border: 1px solid rgba(255, 184, 74, 0.3);
  color: var(--admin);
  padding: 12px 16px;
  border-radius: 6px;
  margin-bottom: 20px;
  font-size: 13px;
}
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}
.stat-card {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 16px;
  border-radius: 8px;
}
.stat-card .label {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.stat-card .value {
  font-size: 24px;
  font-weight: 600;
  margin-top: 4px;
}

.filter-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
  align-items: center;
}
.filter-bar input, .filter-bar select {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 14px;
}
.filter-bar input { flex: 1; min-width: 180px; }
.append-note {
  font-size: 12px;
  color: var(--muted);
  margin-left: auto;
}

.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--panel);
  border: 1px solid var(--success);
  color: var(--success);
  padding: 12px 16px;
  border-radius: 6px;
  font-size: 14px;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s;
  z-index: 1000;
  max-width: 380px;
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast.error { border-color: var(--danger); color: var(--danger); }

.hidden { display: none !important; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.status-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  color: var(--muted);
  font-size: 13px;
}