* {
  box-sizing: border-box;
}

:root {
  --tr-bg: #f0f4ff;
  --tr-card: #ffffff;
  --tr-text: #0f172a;
  --tr-muted: #475569;
  --tr-accent: #4338ca;
  --tr-accent-hover: #3730a3;
  --tr-border: #e2e8f0;
  --tr-folder: #6366f1;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--tr-bg);
  color: var(--tr-text);
}

h1 {
  margin: 0 0 4px;
  font-size: 1.5rem;
}

.subtitle {
  margin: 0;
  color: var(--tr-muted);
  font-size: 0.9rem;
}

.card {
  background: var(--tr-card);
  border: 1px solid var(--tr-border);
  border-radius: 14px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
}

.login-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-card {
  width: min(520px, 100%);
  padding: 28px;
}

.app-shell {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px;
  display: grid;
  gap: 14px;
}

.app-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 20px;
  background: linear-gradient(135deg, #312e81, #6366f1);
  color: #fff;
  border-radius: 16px;
}

.app-header .subtitle {
  color: rgba(255, 255, 255, 0.85);
}

.header-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 10px;
  border: 1px solid var(--tr-accent);
  background: var(--tr-accent);
  color: #fff;
  font-size: 0.9rem;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover {
  background: var(--tr-accent-hover);
  border-color: var(--tr-accent-hover);
}

.btn.secondary {
  background: #fff;
  color: var(--tr-accent);
  border-color: #c7d2fe;
}

.btn.secondary:hover {
  background: #eef2ff;
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.upload-label {
  cursor: pointer;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
}

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

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  align-items: center;
  font-size: 0.9rem;
}

.breadcrumbs button {
  background: none;
  border: none;
  color: var(--tr-accent);
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 6px;
  font: inherit;
}

.breadcrumbs button:hover {
  background: #eef2ff;
}

.breadcrumbs span.sep {
  color: var(--tr-muted);
}

.storage {
  padding: 10px 16px;
  font-size: 0.85rem;
  color: var(--tr-muted);
}

.storage-meter {
  height: 8px;
  background: #e2e8f0;
  border-radius: 999px;
  overflow: hidden;
  margin-top: 6px;
}

.storage-meter > span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, #6366f1, #818cf8);
  border-radius: 999px;
}

.drive {
  padding: 16px;
  min-height: 320px;
}

.drive-message {
  padding: 10px 12px;
  margin-bottom: 12px;
  border-radius: 10px;
  background: #fef3c7;
  color: #92400e;
  font-size: 0.9rem;
}

.drive-message.error {
  background: #fee2e2;
  color: #991b1b;
}

.drive-message.hidden {
  display: none;
}

.drive-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
}

.drive-item {
  border: 1px solid var(--tr-border);
  border-radius: 12px;
  padding: 14px 12px 10px;
  transition: box-shadow 0.15s, border-color 0.15s;
  position: relative;
  background: #fafbff;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.drive-item:hover {
  border-color: #c7d2fe;
  box-shadow: 0 6px 16px rgba(67, 56, 202, 0.12);
}

.drive-item .item-open {
  cursor: pointer;
  flex: 1;
  min-width: 0;
}

.drive-item .icon {
  font-size: 2rem;
  line-height: 1;
  margin-bottom: 8px;
}

.drive-item .name {
  font-size: 0.9rem;
  font-weight: 600;
  word-break: break-word;
}

.drive-item .meta {
  font-size: 0.75rem;
  color: var(--tr-muted);
  margin-top: 4px;
}

.drive-item .item-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  justify-content: center;
  padding-top: 4px;
  border-top: 1px solid var(--tr-border);
}

.btn-icon {
  min-width: 32px;
  height: 28px;
  padding: 0 6px;
  border: 1px solid var(--tr-border);
  border-radius: 8px;
  background: #fff;
  color: var(--tr-text);
  font-size: 0.85rem;
  line-height: 1;
  cursor: pointer;
}

.btn-icon:hover:not(:disabled) {
  background: #eef2ff;
  border-color: #c7d2fe;
}

.btn-icon:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.btn-icon.danger:hover:not(:disabled) {
  background: #fee2e2;
  border-color: #fecaca;
  color: #991b1b;
}

.dialog-hint {
  margin: 0;
  font-size: 0.85rem;
  color: var(--tr-muted);
}

dialog select {
  padding: 10px 12px;
  border: 1px solid var(--tr-border);
  border-radius: 10px;
  font: inherit;
  background: #fff;
}

.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--tr-muted);
  padding: 48px 16px;
}

dialog {
  border: none;
  border-radius: 14px;
  padding: 0;
  max-width: 420px;
  width: calc(100% - 32px);
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.2);
}

dialog form {
  padding: 20px;
  display: grid;
  gap: 12px;
}

dialog label {
  display: grid;
  gap: 6px;
  font-size: 0.9rem;
}

dialog input {
  padding: 10px 12px;
  border: 1px solid var(--tr-border);
  border-radius: 10px;
  font: inherit;
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 4px;
}

@media (max-width: 640px) {
  .app-shell {
    padding: 12px;
  }

  .drive-grid {
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  }
}