:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --surface-2: #243044;
  --border: #2f3f56;
  --text: #e8eef7;
  --muted: #93a4bd;
  --accent: #4da3ff;
  --accent-hover: #79bbff;
  --danger: #ff6b6b;
  --success: #5fd38d;
  --radius: 10px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  font-family: "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.25rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.brand { font-weight: 700; font-size: 1.1rem; }
.brand .sep { color: var(--muted); margin: 0 0.4rem; }

.topbar-actions { display: flex; gap: 0.75rem; align-items: center; }
.user-badge, .usage-badge {
  color: var(--muted);
  font-size: 0.9rem;
}

.btn {
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  border-radius: 8px;
  padding: 0.45rem 0.85rem;
  cursor: pointer;
  font: inherit;
}

.btn:hover { border-color: var(--accent); }
.btn-primary { background: var(--accent); color: #04101f; border-color: transparent; font-weight: 600; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { background: transparent; }
.btn-danger { background: rgba(255, 107, 107, 0.15); border-color: var(--danger); color: #ffb4b4; }
.btn-icon { min-width: 2.2rem; padding: 0.45rem; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.auth-page {
  display: grid;
  place-items: center;
  padding: 2rem;
}

.auth-card {
  width: min(420px, 100%);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
}

.auth-card h1 { margin: 0 0 0.25rem; }
.subtitle { color: var(--muted); margin-top: 0; }

.auth-form { display: grid; gap: 0.75rem; margin-top: 1.5rem; }
.auth-form label { display: grid; gap: 0.35rem; color: var(--muted); font-size: 0.9rem; }
.auth-form input {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 0.65rem 0.75rem;
  font: inherit;
}

.alert {
  padding: 0.75rem 0.9rem;
  border-radius: 8px;
  margin-top: 1rem;
}
.alert-error { background: rgba(255, 107, 107, 0.15); border: 1px solid var(--danger); color: #ffb4b4; }

.dashboard { padding: 1.25rem; max-width: 1200px; margin: 0 auto; }
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.folders-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.folder-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  display: grid;
  gap: 0.75rem;
}

.folder-card h3 { margin: 0; font-size: 1rem; }
.folder-meta { color: var(--muted); font-size: 0.85rem; }
.storage-summary .over-limit,
.folder-usage.over-limit,
.usage-badge.over-limit,
#folder-size-hint.over-limit {
  color: var(--danger);
  font-weight: 600;
}

.file-browser.upload-blocked {
  cursor: not-allowed;
}
.folder-actions { display: flex; flex-wrap: wrap; gap: 0.5rem; }

.links-list { display: grid; gap: 0.35rem; margin-top: 0.5rem; }
.link-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--muted);
}

dialog {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  padding: 1.25rem;
  min-width: min(480px, 90vw);
}

dialog::backdrop { background: rgba(0, 0, 0, 0.55); }
dialog form { display: grid; gap: 0.85rem; }
dialog label { display: grid; gap: 0.35rem; color: var(--muted); }
dialog input[type="text"],
dialog input[type="number"] {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  padding: 0.55rem 0.65rem;
  font: inherit;
}

.folder-size-text-wrap {
  display: grid;
  gap: 0.35rem;
  color: var(--muted);
}

.folder-size-text-wrap input[type="number"] {
  width: 100%;
}

.folder-size-control {
  display: grid;
  gap: 0.35rem;
}

.folder-size-control > label {
  color: var(--muted);
}

.size-slider-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
  align-items: center;
}

.size-slider-row output {
  min-width: 6.5rem;
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  font-weight: 600;
}

dialog input[type="range"] {
  width: 100%;
  accent-color: var(--accent, #4f8cff);
  cursor: pointer;
}

dialog input[type="range"]:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.dialog-actions { display: flex; gap: 0.5rem; justify-content: flex-end; flex-wrap: wrap; }
.hint { color: var(--muted); font-size: 0.9rem; margin: 0; }

.permission-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.5rem;
}

.permission-grid label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text);
}

.browser-toolbar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-wrap: wrap;
  min-width: 0;
}

.breadcrumb button {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  padding: 0.2rem 0.35rem;
  font: inherit;
}

.breadcrumb span { color: var(--muted); }

.toolbar-spacer { flex: 1; }

.file-browser {
  position: relative;
  min-height: calc(100vh - 110px);
  padding: 1rem;
}

.file-browser.drag-over {
  outline: 2px dashed var(--accent);
  outline-offset: -8px;
  background: rgba(77, 163, 255, 0.05);
}

.file-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.75rem;
  outline: none;
}

.file-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.85rem 0.65rem;
  text-align: center;
  cursor: default;
  user-select: none;
  transition: border-color 0.15s, background 0.15s;
}

.file-item:hover { border-color: var(--accent); }
.file-item.selected {
  border-color: var(--accent);
  background: rgba(77, 163, 255, 0.12);
}

.file-item.dragging { opacity: 0.5; }
.file-item.drop-target { border-color: var(--success); background: rgba(95, 211, 141, 0.12); }

.file-icon { font-size: 2rem; line-height: 1; margin-bottom: 0.45rem; }
.file-name {
  font-size: 0.85rem;
  word-break: break-word;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.empty-state, .loading {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  color: var(--muted);
  pointer-events: none;
}

.hidden { display: none !important; }

.context-menu {
  position: fixed;
  z-index: 1000;
  min-width: 160px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 0.35rem;
  display: grid;
}

.context-menu button {
  background: none;
  border: none;
  color: var(--text);
  text-align: left;
  padding: 0.5rem 0.65rem;
  border-radius: 6px;
  cursor: pointer;
  font: inherit;
}

.context-menu button:hover { background: var(--surface-2); }
.context-menu button:disabled { opacity: 0.4; cursor: not-allowed; }

#properties-content {
  margin: 0;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.35rem 1rem;
}

#properties-content dt { color: var(--muted); }
#properties-content dd { margin: 0; word-break: break-all; }

@media (max-width: 700px) {
  .browser-toolbar { flex-wrap: wrap; }
  .file-list { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); }
}