* {
  box-sizing: border-box;
}

:root {
  color-scheme: light;
  --td-bg: #f8fafc;
  --td-card: #ffffff;
  --td-surface: #ffffff;
  --td-surface-hover: #e2e8f0;
  --td-text: #0f172a;
  --td-muted: #64748b;
  --td-accent: #2563eb;
  --td-accent-hover: #1d4ed8;
  --td-border: #e2e8f0;
  --td-header: linear-gradient(135deg, #1e3a8a, #3b82f6);
  --td-on-accent: #ffffff;
  --td-header-input-bg: rgba(255, 255, 255, 0.12);
  --td-header-input-border: rgba(255, 255, 255, 0.35);
  --td-header-input-placeholder: rgba(255, 255, 255, 0.65);
  --td-header-btn-secondary-bg: rgba(255, 255, 255, 0.2);
  --td-header-btn-secondary-hover: rgba(255, 255, 255, 0.32);
  --td-shadow-card: 0 8px 24px rgba(15, 23, 42, 0.06);
  --td-shadow-editor: 0 4px 20px rgba(15, 23, 42, 0.06);
  --td-shadow-dialog: 0 20px 50px rgba(15, 23, 42, 0.2);
  --td-save-error: #b91c1c;
  --td-quill-picker-bg: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --td-bg: #0b1120;
    --td-card: #1e293b;
    --td-surface: #1e293b;
    --td-surface-hover: #334155;
    --td-text: #f1f5f9;
    --td-muted: #94a3b8;
    --td-accent: #3b82f6;
    --td-accent-hover: #60a5fa;
    --td-border: #334155;
    --td-header: linear-gradient(135deg, #0f172a, #1e40af);
    --td-on-accent: #ffffff;
    --td-header-input-bg: rgba(15, 23, 42, 0.45);
    --td-header-input-border: rgba(148, 163, 184, 0.4);
    --td-header-input-placeholder: rgba(203, 213, 225, 0.65);
    --td-header-btn-secondary-bg: rgba(15, 23, 42, 0.35);
    --td-header-btn-secondary-hover: rgba(15, 23, 42, 0.55);
    --td-shadow-card: 0 8px 24px rgba(0, 0, 0, 0.32);
    --td-shadow-editor: 0 4px 20px rgba(0, 0, 0, 0.28);
    --td-shadow-dialog: 0 20px 50px rgba(0, 0, 0, 0.45);
    --td-save-error: #fecaca;
    --td-quill-picker-bg: #1e293b;
  }
}

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

.btn {
  border: none;
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  background: var(--td-accent);
  color: var(--td-on-accent);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn:hover {
  background: var(--td-accent-hover);
}

.btn.secondary {
  background: var(--td-surface-hover);
  color: var(--td-text);
}

.btn.secondary:hover {
  background: var(--td-border);
}

.card {
  background: var(--td-card);
  border: 1px solid var(--td-border);
  border-radius: 12px;
  box-shadow: var(--td-shadow-card);
}

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

.login-card {
  max-width: 420px;
  width: 100%;
  padding: 28px;
}

.login-card h1 {
  margin: 0 0 8px;
  font-size: 1.5rem;
  color: var(--td-text);
}

.subtitle {
  color: var(--td-muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

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

.editor-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 16px;
  background: var(--td-header);
  color: var(--td-on-accent);
}

.editor-header .btn.secondary {
  background: var(--td-header-btn-secondary-bg);
  color: var(--td-on-accent);
}

.editor-header .btn.secondary:hover {
  background: var(--td-header-btn-secondary-hover);
}

.editor-header-left,
.editor-header-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.doc-title-input {
  min-width: 200px;
  max-width: min(520px, 50vw);
  border: 1px solid var(--td-header-input-border);
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 1rem;
  font-weight: 600;
  background: var(--td-header-input-bg);
  color: var(--td-on-accent);
}

.doc-title-input::placeholder {
  color: var(--td-header-input-placeholder);
}

.save-status {
  font-size: 13px;
  opacity: 0.9;
}

.save-status.error {
  color: var(--td-save-error);
}

.ql-toolbar-host {
  background: var(--td-card);
  border-bottom: 1px solid var(--td-border);
}

.ql-toolbar-host .ql-toolbar {
  border: none;
}

.editor-mount {
  flex: 1;
  display: flex;
  flex-direction: column;
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  padding: 0 16px 32px;
}

.editor-mount .ql-container {
  flex: 1;
  font-size: 16px;
  border: none;
  background: var(--td-card);
  border-radius: 0 0 12px 12px;
  box-shadow: var(--td-shadow-editor);
  color: var(--td-text);
}

.editor-mount .ql-editor {
  min-height: calc(100vh - 180px);
  padding: 24px 28px;
  color: var(--td-text);
}

/* Quill snow — follow device theme */
.ql-toolbar.ql-snow,
.ql-container.ql-snow {
  border-color: var(--td-border);
}

.ql-snow .ql-stroke {
  stroke: var(--td-muted);
}

.ql-snow .ql-fill {
  fill: var(--td-muted);
}

.ql-snow .ql-picker-label {
  color: var(--td-text);
}

.ql-snow .ql-picker-label:hover,
.ql-snow .ql-picker-item:hover {
  color: var(--td-accent);
}

.ql-snow .ql-picker-options {
  background: var(--td-quill-picker-bg);
  border-color: var(--td-border);
  color: var(--td-text);
}

.ql-snow .ql-picker.ql-expanded .ql-picker-label {
  border-color: var(--td-border);
}

.ql-snow .ql-tooltip {
  background: var(--td-card);
  border-color: var(--td-border);
  color: var(--td-text);
  box-shadow: var(--td-shadow-dialog);
}

.ql-snow .ql-tooltip input[type="text"] {
  background: var(--td-surface);
  border-color: var(--td-border);
  color: var(--td-text);
}

.ql-editor.ql-blank::before {
  color: var(--td-muted);
  font-style: normal;
}

dialog {
  border: none;
  border-radius: 12px;
  padding: 0;
  max-width: 520px;
  width: calc(100% - 32px);
  box-shadow: var(--td-shadow-dialog);
  background: var(--td-card);
  color: var(--td-text);
}

dialog::backdrop {
  background: rgba(15, 23, 42, 0.45);
}

@media (prefers-color-scheme: dark) {
  dialog::backdrop {
    background: rgba(0, 0, 0, 0.62);
  }
}

dialog form {
  padding: 20px;
}

dialog h2 {
  margin: 0 0 8px;
  font-size: 1.15rem;
  color: var(--td-text);
}

.dialog-hint {
  color: var(--td-muted);
  font-size: 0.9rem;
  margin: 0 0 12px;
}

dialog label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--td-text);
}

dialog input[type="text"] {
  width: 100%;
  margin-top: 6px;
  padding: 8px 10px;
  border: 1px solid var(--td-border);
  border-radius: 8px;
  font-size: 14px;
  background: var(--td-surface);
  color: var(--td-text);
}

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