:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #1a1d21;
  --muted: #6b7280;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --danger: #ef4444;
  --border: #e5e7eb;
  --radius: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --panel: #171a20;
    --text: #e5e7eb;
    --muted: #9ca3af;
    --accent: #60a5fa;
    --accent-hover: #3b82f6;
    --danger: #f87171;
    --border: #2a2f3a;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
}

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

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.center-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.auth-card {
  width: 100%;
  max-width: 380px;
}

.auth-card h1 {
  margin: 0 0 8px;
  font-size: 22px;
}

.auth-card p {
  margin: 0 0 20px;
  font-size: 13px;
}

.field {
  display: block;
  margin-bottom: 14px;
}

.field span {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 4px;
}

input {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
}

input:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
}

button {
  font: inherit;
  cursor: pointer;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  padding: 9px 14px;
}

button:hover {
  border-color: var(--muted);
}

button:disabled {
  opacity: 0.6;
  cursor: default;
}

.btn-primary {
  width: 100%;
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}

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

.error {
  color: var(--danger);
  font-size: 13px;
  min-height: 18px;
  margin: 0 0 10px;
}

/* layout (signed-in) */

.layout {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}

.brand {
  font-weight: 700;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.user-badge {
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--muted);
}

.content {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 20px;
}

/* ---- file browser ---- */

.browser {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.icon {
  width: 20px;
  height: 20px;
  display: inline-block;
  vertical-align: middle;
}

.ic-folder {
  color: var(--accent);
}

.ic-muted {
  color: var(--muted);
}

.crumbs {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 6px 0 12px;
  font-size: 15px;
  flex-wrap: wrap;
}

.crumb {
  cursor: pointer;
  color: var(--muted);
  padding: 3px 6px;
  border-radius: 6px;
}

.crumb:hover {
  color: var(--text);
  background: var(--panel);
}

.crumb.current {
  color: var(--text);
  font-weight: 600;
  cursor: default;
  background: none;
}

.crumb-sep {
  color: var(--muted);
  padding: 0 1px;
}

.toolbar {
  display: flex;
  justify-content: flex-end;
  gap: 6px;
  padding-bottom: 12px;
}

.icon-btn {
  padding: 7px 9px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--muted);
  display: inline-flex;
  align-items: center;
}

.icon-btn:hover {
  border-color: var(--muted);
}

.icon-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.ic-btn {
  width: 18px;
  height: 18px;
  color: inherit;
}

.entries-area {
  flex: 1;
  min-height: 240px;
}

.center-note {
  text-align: center;
  padding: 48px 0;
}

.error-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--danger);
  font-size: 14px;
}

/* root picker */

.root-picker {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}

.root-tile {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}

.root-tile:hover {
  border-color: var(--muted);
}

.icon-big {
  width: 44px;
  height: 44px;
}

.root-tile-name {
  font-weight: 600;
  font-size: 15px;
}

.root-tile-path {
  font-size: 13px;
  flex: 1;
}

/* grid view */

.entries-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 10px;
}

.tile {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 10px 12px;
  text-align: center;
  cursor: pointer;
}

.tile:hover {
  border-color: var(--muted);
}

.tile-icon {
  width: 42px;
  height: 42px;
  margin: 0 auto 10px;
  display: block;
}

.tile-name {
  font-size: 13px;
  line-height: 1.3;
  word-break: break-word;
}

/* list view */

.entries-list {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

.row {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr) 90px 150px;
  gap: 12px;
  align-items: center;
  padding: 9px 14px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  font-size: 14px;
}

.row:last-child {
  border-bottom: none;
}

.row:hover {
  background: var(--bg);
}

.row-icon {
  width: 20px;
  height: 20px;
}

.row-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.row-size,
.row-date {
  font-size: 13px;
  text-align: right;
}

@media (max-width: 640px) {
  .row {
    grid-template-columns: 28px minmax(0, 1fr) 90px;
  }

  .row-date {
    display: none;
  }
}

/* context menu */

.ctx-menu {
  position: fixed;
  z-index: 100;
  min-width: 190px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 5px;
  box-shadow: 0 8px 24px rgb(0 0 0 / 18%);
}

.ctx-item {
  padding: 8px 12px;
  border-radius: 7px;
  font-size: 14px;
  cursor: pointer;
}

.ctx-item:hover {
  background: var(--bg);
}

.ctx-item.disabled {
  opacity: 0.45;
  cursor: default;
}

.ctx-item.disabled:hover {
  background: none;
}

/* toast */

.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 200;
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 11px 16px;
  font-size: 14px;
  box-shadow: 0 8px 24px rgb(0 0 0 / 18%);
  max-width: 320px;
}


/* ---- modals ---- */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgb(0 0 0 / 45%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal {
  width: 440px;
  max-width: calc(100vw - 32px);
  padding: 20px;
}

.modal.picker {
  width: 520px;
}

.modal-title {
  margin: 0 0 12px;
  font-size: 16px;
}

.modal-label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
}

.modal .input {
  width: 100%;
  box-sizing: border-box;
  margin-bottom: 16px;
}

.modal-message {
  white-space: pre-line;
  font-size: 14px;
  margin: 0 0 8px;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 16px;
}

.btn-danger {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}

.btn-danger:hover {
  background: color-mix(in srgb, var(--danger) 85%, black);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.conflict-list {
  max-height: 200px;
  overflow-y: auto;
  margin: 8px 0;
  padding-left: 20px;
  font-size: 13px;
}

.picker-roots {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.root-opt {
  font-size: 13px;
}

.root-opt.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.picker-current {
  font-size: 13px;
  margin: 0 0 8px;
}

.picker-crumbs {
  margin-bottom: 8px;
}

.picker-entries {
  max-height: 240px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.picker-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  cursor: pointer;
}

.picker-row:hover {
  background: var(--bg);
}