:root {
  /* LoreLight (reader and app) */
  --font-family: 'EB Garamond', Georgia, serif;
  --font-size: 18px;
  --line-height: 1.6;
  --paragraph-spacing: 1em;
  --content-max-width: 680px;
  --margin-size: 2rem;
  --bg-color: #fefefe;
  --text-color: #1a1a1a;
  --accent-color: #4a6fa5;
  --active-paragraph-border: 2px solid var(--accent-color);
  --active-paragraph-tint: rgba(74, 111, 165, 0.06);
  --reader-gutter-height: 4.75rem;
  --reader-overlay-width: 24rem;
  --text-alignment: left;
  --safe-area-top: env(safe-area-inset-top, 0);
  --safe-area-right: env(safe-area-inset-right, 0);
  --safe-area-bottom: env(safe-area-inset-bottom, 0);
  --safe-area-left: env(safe-area-inset-left, 0);

  /* App shell: smaller, scannable UI (library/settings) */
  --app-font-size: 15px;
  --app-line-height: 1.45;

  /* Surface & text (light defaults) */
  --ll-bg: #fefefe;
  --ll-bg-raised: #fff;
  --ll-text: #1a1a1a;
  --ll-text-muted: #5a5a5a;

  /* Borders */
  --ll-border: rgba(0,0,0,0.12);
  --ll-border-muted: rgba(0,0,0,0.06);
  --ll-radius: 0.25rem;

  /* Interactive */
  --ll-accent: #1a1a1a;
  --ll-accent-hover: #000000;
  --ll-accent-focus: rgba(0,0,0,0.15);
  --ll-btn-text: #fff;
  --ll-btn-secondary-bg: transparent;
  --ll-btn-secondary-text: var(--ll-text);
  --ll-btn-secondary-hover: rgba(0,0,0,0.04);

  /* Status */
  --ll-success-color: #0f5d3f;
  --ll-error-color: #a13232;
  --ll-warning-color: #7a430e;
  --ll-warning-bg: rgba(170, 97, 33, 0.08);

  /* Panel (drawers, dropdowns, overlays) */
  --ll-panel-bg: var(--ll-bg-raised);
  --ll-panel-border: var(--ll-border);
  --ll-panel-radius: var(--ll-radius);
  --ll-panel-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);

  /* Card */
  --ll-card-hover-bg: color-mix(in srgb, var(--ll-accent) 4%, var(--ll-bg-raised));

  /* Reader */
  --ll-reader-highlight-bg: rgba(0,0,0,0.05);
  --ll-reader-highlight-border: rgba(0,0,0,0.2);
  --ll-reader-highlight-hover: rgba(0,0,0,0.1);
  --ll-reader-card-bg: rgba(0,0,0,0.02);
  --ll-reader-card-border: rgba(0,0,0,0.1);
  --ll-reader-meta-color: rgba(0,0,0,0.4);
  --ll-reader-separator: rgba(0,0,0,0.1);
  --ll-reader-heading-underline: rgba(0,0,0,0.05);
}

/* Explicit light theme when user sets it (overrides prefers-color-scheme) */
html[data-theme="light"] {
  --bg-color: #fefefe;
  --text-color: #1a1a1a;
  --accent-color: #4a6fa5;
  --active-paragraph-tint: rgba(74, 111, 165, 0.06);

  --ll-bg: #fefefe;
  --ll-bg-raised: #fff;
  --ll-text: #1a1a1a;
  --ll-text-muted: #5a5a5a;
  --ll-border: rgba(0,0,0,0.12);
  --ll-border-muted: rgba(0,0,0,0.06);
  --ll-accent: #1a1a1a;
  --ll-accent-hover: #000000;
  --ll-accent-focus: rgba(0,0,0,0.15);
  --ll-btn-text: #fff;
  --ll-btn-secondary-hover: rgba(0,0,0,0.04);
  --ll-success-color: #0f5d3f;
  --ll-error-color: #a13232;
  --ll-warning-color: #7a430e;
  --ll-warning-bg: rgba(170, 97, 33, 0.08);
  --ll-reader-highlight-bg: rgba(0,0,0,0.05);
  --ll-reader-highlight-border: rgba(0,0,0,0.2);
  --ll-reader-highlight-hover: rgba(0,0,0,0.1);
  --ll-reader-card-bg: rgba(0,0,0,0.02);
  --ll-reader-card-border: rgba(0,0,0,0.1);
  --ll-reader-meta-color: rgba(0,0,0,0.4);
  --ll-reader-separator: rgba(0,0,0,0.1);
  --ll-reader-heading-underline: rgba(0,0,0,0.05);
}

/* Auto dark when no theme set and system prefers dark */
@media (prefers-color-scheme: dark) {
  html:not([data-theme]) {
    --bg-color: #13161e;
    --text-color: #c2c7d0;
    --accent-color: #7fa7d4;
    --active-paragraph-tint: rgba(127, 167, 212, 0.08);

    --ll-bg: #13161e;
    --ll-bg-raised: #1c2028;
    --ll-text: #c2c7d0;
    --ll-text-muted: #7b8495;
    --ll-border: hsl(210, 15%, 28%);
    --ll-border-muted: hsl(210, 15%, 22%);
    --ll-accent: #7fa7d4;
    --ll-accent-hover: #9fbde0;
    --ll-accent-focus: rgba(127, 167, 212, 0.3);
    --ll-btn-text: #13161e;
    --ll-btn-secondary-hover: hsl(210, 15%, 25%);
    --ll-success-color: #4ade80;
    --ll-error-color: #f87171;
    --ll-warning-color: #fbbf24;
    --ll-warning-bg: rgba(251, 191, 36, 0.1);
    --ll-reader-highlight-bg: rgba(255,255,255,0.06);
    --ll-reader-highlight-border: rgba(255,255,255,0.2);
    --ll-reader-highlight-hover: rgba(255,255,255,0.1);
    --ll-reader-card-bg: rgba(255,255,255,0.03);
    --ll-reader-card-border: rgba(255,255,255,0.1);
    --ll-reader-meta-color: rgba(255,255,255,0.4);
    --ll-reader-separator: rgba(255,255,255,0.1);
    --ll-reader-heading-underline: rgba(255,255,255,0.06);
  }
}

html[data-theme="dark"] {
  --bg-color: #13161e;
  --text-color: #c2c7d0;
  --accent-color: #7fa7d4;
  --active-paragraph-tint: rgba(127, 167, 212, 0.08);

  --ll-bg: #13161e;
  --ll-bg-raised: #1c2028;
  --ll-text: #c2c7d0;
  --ll-text-muted: #7b8495;
  --ll-border: hsl(210, 15%, 28%);
  --ll-border-muted: hsl(210, 15%, 22%);
  --ll-accent: #7fa7d4;
  --ll-accent-hover: #9fbde0;
  --ll-accent-focus: rgba(127, 167, 212, 0.3);
  --ll-btn-text: #13161e;
  --ll-btn-secondary-hover: hsl(210, 15%, 25%);
  --ll-success-color: #4ade80;
  --ll-error-color: #f87171;
  --ll-warning-color: #fbbf24;
  --ll-warning-bg: rgba(251, 191, 36, 0.1);
  --ll-reader-highlight-bg: rgba(255,255,255,0.06);
  --ll-reader-highlight-border: rgba(255,255,255,0.2);
  --ll-reader-highlight-hover: rgba(255,255,255,0.1);
  --ll-reader-card-bg: rgba(255,255,255,0.03);
  --ll-reader-card-border: rgba(255,255,255,0.1);
  --ll-reader-meta-color: rgba(255,255,255,0.4);
  --ll-reader-separator: rgba(255,255,255,0.1);
  --ll-reader-heading-underline: rgba(255,255,255,0.06);
}

html[data-theme="sepia"] {
  --bg-color: #f5f0e8;
  --text-color: #3d3229;
  --accent-color: #6b7f5e;
  --active-paragraph-tint: rgba(107, 127, 94, 0.06);

  --ll-bg: #f5f0e8;
  --ll-bg-raised: #ece4d4;
  --ll-text: #3d3229;
  --ll-text-muted: #6b5d4f;
  --ll-border: hsl(30, 20%, 75%);
  --ll-border-muted: hsl(30, 15%, 82%);
  --ll-accent: #6b7f5e;
  --ll-accent-hover: #586b4d;
  --ll-accent-focus: rgba(107, 127, 94, 0.25);
  --ll-btn-text: #fff;
  --ll-btn-secondary-hover: hsl(30, 15%, 86%);
  --ll-success-color: #0f5d3f;
  --ll-error-color: #a13232;
  --ll-warning-color: #7a430e;
  --ll-warning-bg: rgba(170, 97, 33, 0.08);
  --ll-reader-highlight-bg: rgba(80,60,30,0.06);
  --ll-reader-highlight-border: rgba(80,60,30,0.2);
  --ll-reader-highlight-hover: rgba(80,60,30,0.1);
  --ll-reader-card-bg: rgba(80,60,30,0.03);
  --ll-reader-card-border: rgba(80,60,30,0.1);
  --ll-reader-meta-color: rgba(61,50,41,0.45);
  --ll-reader-separator: rgba(80,60,30,0.1);
  --ll-reader-heading-underline: rgba(80,60,30,0.06);
}

/* Root base so rem-based elements match app scale (15px) */
html {
  font-size: 93.75%;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  font-size: var(--app-font-size);
  line-height: var(--app-line-height);
  text-align: var(--text-alignment);
  color: var(--ll-text);
  background: var(--ll-bg);
}

/* Headings in app shell (library/settings) */
.ll-container h1,
.ll-container h2 {
  font-size: 1.35rem;
  line-height: 1.25;
  margin-bottom: 0.35rem;
  color: var(--ll-text);
}
.ll-container h3 {
  font-size: 1.1rem;
  line-height: 1.3;
  color: var(--ll-text);
}
.ll-container p {
  font-size: 0.9375rem;
  margin-bottom: 0.5rem;
  color: var(--ll-text);
}
.ll-container small {
  font-size: 0.8125rem;
  color: var(--ll-text-muted);
  opacity: 1;
}

a {
  color: var(--ll-accent);
  text-decoration: underline;
}
a:hover {
  color: var(--ll-accent-hover);
}

/* Buttons */
button, [type="submit"] {
  font: inherit;
  cursor: pointer;
  border: 1px solid transparent;
  border-radius: var(--ll-radius);
  padding: 0.55rem 1rem;
  background: var(--ll-accent);
  color: var(--ll-btn-text);
  transition: background-color 120ms ease;
}
button:hover { background: var(--ll-accent-hover); }
button:focus-visible { outline: 2px solid var(--ll-accent-focus); outline-offset: 2px; }
button:disabled { opacity: 0.5; cursor: not-allowed; }
button.secondary {
  background: var(--ll-btn-secondary-bg);
  color: var(--ll-btn-secondary-text);
  border-color: var(--ll-border);
}
button.secondary:hover { background: var(--ll-btn-secondary-hover); }

/* Toggle/pressed state for tab-like buttons (non-tab contexts only) */
button[aria-pressed="true"]:not(.ll-btn-tab),
button[aria-current="true"]:not(.ll-btn-tab) {
  background: color-mix(in srgb, var(--ll-accent) 14%, transparent);
  border-color: var(--ll-border);
  font-weight: 600;
}

/* Tab toggle buttons (light DOM) */
.ll-btn-tab {
  background: transparent;
  color: var(--ll-btn-secondary-text);
  border: 1px solid var(--ll-border);
  border-radius: var(--ll-radius);
  padding: 0.35rem 0.7rem;
  font-size: 0.9rem;
  cursor: pointer;
}
.ll-btn-tab:hover {
  background: var(--ll-btn-secondary-hover);
}
.ll-btn-tab[aria-pressed='true'],
.ll-btn-tab[aria-current='true'] {
  background: var(--ll-text);
  color: #fff;
  border-color: var(--ll-text);
  font-weight: 600;
}

/* Ghost buttons (light DOM) */
.ll-btn-ghost {
  background: transparent;
  border: none;
  padding: 0.35rem 0.6rem;
  color: inherit;
  cursor: pointer;
}
.ll-btn-ghost:hover {
  background: rgba(0,0,0,0.06);
}

/* Danger buttons */
.ll-btn-danger {
  background: transparent;
  color: var(--ll-error-color);
  border: 1px solid var(--ll-error-color);
}
.ll-btn-danger:hover {
  background: color-mix(in srgb, var(--ll-error-color) 8%, transparent);
}

/* Navigation link */
a.ll-link {
  color: var(--ll-accent);
  text-decoration: none;
}
a.ll-link:hover {
  text-decoration: underline;
  color: var(--ll-accent-hover);
}

/* Form elements */
input, select, textarea {
  font: inherit;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--ll-border);
  border-radius: var(--ll-radius);
  background: var(--ll-bg);
  color: var(--ll-text);
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid var(--ll-accent-focus);
  outline-offset: 1px;
}
input::placeholder, textarea::placeholder {
  color: var(--ll-text-muted);
  opacity: 1;
}
label { display: block; margin-bottom: 0.25rem; font-weight: 500; }

/* Article: light treatment (no heavy card look) */
article {
  padding: 1rem 0;
}

/* Progress bar */
progress {
  width: 100%;
  height: 0.5rem;
  border: none;
  border-radius: var(--ll-radius);
  background: var(--ll-border-muted);
}
progress::-webkit-progress-bar { background: var(--ll-border-muted); border-radius: var(--ll-radius); }
progress::-webkit-progress-value { background: var(--ll-accent); border-radius: var(--ll-radius); }
progress::-moz-progress-bar { background: var(--ll-accent); border-radius: var(--ll-radius); }

/* Layout utility */
.ll-container { max-width: 64rem; margin-inline: auto; }

/* Status messages (loading, empty, error) */
.ll-status {
  margin: 1rem 0;
  color: var(--ll-text-muted);
}
.ll-status--error {
  color: var(--ll-error-color);
}

/* Details/summary (for import popover) */
details summary {
  cursor: pointer;
  list-style: none;
}
details summary::-webkit-details-marker { display: none; }

/* Responsive: slightly larger touch targets on very small screens */
@media (max-width: 480px) {
  :root {
    --app-font-size: 16px;
  }
}

/* Icon button (gear, close, etc.) — large e-ink touch target */
.ll-btn-icon {
  display: inline-grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: 1px solid var(--ll-border);
  border-radius: var(--ll-radius);
  background: transparent;
  color: var(--ll-text);
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
}
.ll-btn-icon:hover {
  background: var(--ll-btn-secondary-hover);
}

/* Toast status messages */
.ll-toast {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--ll-border);
  border-radius: var(--ll-radius);
  font-size: 0.9rem;
}
.ll-toast--success {
  border-color: var(--ll-success-color);
  color: var(--ll-success-color);
}
.ll-toast--error {
  border-color: var(--ll-error-color);
  color: var(--ll-error-color);
}

/* Empty state placeholder */
.ll-empty-state {
  border: 1px dashed var(--ll-border-muted);
  border-radius: var(--ll-radius);
  padding: 2rem;
  text-align: center;
  color: var(--ll-text-muted);
  font-size: 0.9375rem;
}

/* Section divider */
.ll-divider {
  border: none;
  border-top: 1px solid var(--ll-border-muted);
  margin: 0;
}

/* Loading pulse animation */
@keyframes ll-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}
.ll-loading {
  text-align: center;
  padding: 2rem;
  color: var(--ll-text-muted);
  animation: ll-pulse 1.8s ease-in-out infinite;
}

@media (prefers-reduced-motion: reduce),
html[data-reduce-motion="true"] {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}