/* =========================
   SwiftReader - Styles
   Privacy-first, responsive, accessible
   ========================= */

/* ---------- Reset / Base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  line-height: 1.4;
  background: var(--bg);
  color: var(--text);
}

body.modal-open {
  overflow: hidden;
}

img, svg, video {
  max-width: 100%;
  height: auto;
}

button, input, textarea, select {
  font: inherit;
}

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.skip-link {
  position: absolute;
  left: 12px;
  top: -48px;
  background: var(--card);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  z-index: 9999;
}
.skip-link:focus {
  top: 12px;
}

/* ---------- Theme Tokens ---------- */
:root {
  --bg: #0b0d10;
  --card: #12161c;
  --card2: #0f1318;
  --text: #e9eef5;
  --muted: #a7b3c4;
  --border: rgba(255, 255, 255, 0.10);
  --shadow: 0 10px 30px rgba(0,0,0,0.35);
  --focus: #66a6ff;

  /* Subtle accent glow for a more colorful, Apple-like polish. */
  --primary: #4c8dff;
  --primary2: #2f6cf0;
  --primaryGlow: rgba(76, 141, 255, 0.35);
  --danger: #ff4b55;
  --warning: #ffcc66;

  --chip: rgba(76, 141, 255, 0.14);
  --chipText: #b9d2ff;

  --radius: 16px;
  --radius2: 22px;

  --gap: 16px;
  --gap2: 22px;

  --maxLeft: 18ch;  /* RSVP left segment width */
  --maxRight: 26ch; /* RSVP right segment width */
  --rsvpFontSize: 52px;
  --rsvpFontWeight: 700;
  --rsvpPivot: #ff4b55; /* red letter */
  --readerFontFamily: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
}

/* Light mode (auto) */
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f9fc;
    --card: #ffffff;
    --card2: #f3f6fb;
    --text: #0c1624;
    --muted: #4b5a70;
    --border: rgba(12, 22, 36, 0.10);
    --shadow: 0 10px 30px rgba(10, 20, 30, 0.12);
    --focus: #1f5eff;

    --primary: #1f5eff;
    --primary2: #1748c3;
    --primaryGlow: rgba(31, 94, 255, 0.28);
    --danger: #d92f3a;
    --warning: #9a6b00;

    --chip: rgba(31, 94, 255, 0.10);
    --chipText: #1c4fe3;

    --rsvpPivot: #d92f3a;
  }
}

/* Optional: allow JS to force theme */
[data-theme="dark"] {
  --bg: #0b0d10;
  --card: #12161c;
  --card2: #0f1318;
  --text: #e9eef5;
  --muted: #a7b3c4;
  --border: rgba(255, 255, 255, 0.10);
  --shadow: 0 10px 30px rgba(0,0,0,0.35);
  --focus: #66a6ff;

  --primary: #4c8dff;
  --primary2: #2f6cf0;
  --primaryGlow: rgba(76, 141, 255, 0.35);
  --danger: #ff4b55;
  --warning: #ffcc66;

  --chip: rgba(76, 141, 255, 0.14);
  --chipText: #b9d2ff;

  --rsvpPivot: #ff4b55;
}

[data-theme="light"] {
  --bg: #f7f9fc;
  --card: #ffffff;
  --card2: #f3f6fb;
  --text: #0c1624;
  --muted: #4b5a70;
  --border: rgba(12, 22, 36, 0.10);
  --shadow: 0 10px 30px rgba(10, 20, 30, 0.12);
  --focus: #1f5eff;

  --primary: #1f5eff;
  --primary2: #1748c3;
  --primaryGlow: rgba(31, 94, 255, 0.28);
  --danger: #d92f3a;
  --warning: #9a6b00;

  --chip: rgba(31, 94, 255, 0.10);
  --chipText: #1c4fe3;

  --rsvpPivot: #d92f3a;
}

/* ---------- Layout ---------- */
.app-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  /* Add a subtle gradient tint to make the header feel more lively without layout changes. */
  background: linear-gradient(135deg, color-mix(in srgb, var(--bg) 86%, transparent), color-mix(in srgb, var(--primary) 12%, transparent));
  backdrop-filter: blur(10px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.logo {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), color-mix(in srgb, var(--primary2) 60%, black));
  display: grid;
  place-items: center;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: white;
  box-shadow: var(--shadow);
}

.brand-text {
  min-width: 0;
}

.brand-name {
  font-weight: 800;
  letter-spacing: -0.3px;
}

.brand-tagline {
  font-size: 12px;
  color: var(--muted);
  margin-top: 2px;
}

.header-actions {
  display: flex;
  gap: 10px;
}

.app-shell {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: calc(100vh - 68px);
}

.sidebar {
  border-right: 1px solid var(--border);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  background: color-mix(in srgb, var(--bg) 90%, var(--card2));
}

.sidebar-top {
  display: grid;
  gap: 8px;
}

.sidebar-bottom {
  margin-top: auto;
  display: grid;
  gap: 10px;
}

.main {
  padding: 18px;
}

/* Responsive: collapse sidebar */
@media (max-width: 980px) {
  .app-shell {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: fixed;
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 10;
    border-right: none;
    border-bottom: none;
    border-top: 1px solid var(--border);
    padding: 8px 10px;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 10px;
    background: color-mix(in srgb, var(--bg) 94%, var(--card2));
    box-shadow: 0 -8px 24px color-mix(in srgb, var(--shadow) 60%, transparent);
  }
  .sidebar-bottom {
    display: none;
  }
  .sidebar-top {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
    width: 100%;
  }
  .nav-item {
    flex: 1 1 0;
    width: 100%;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 8px 6px;
    border-radius: 12px;
    gap: 6px;
  }
  .nav-icon {
    width: auto;
  }
  .nav-label {
    font-size: 11px;
  }
  .main {
    padding: 14px 14px 96px;
  }
}

/* ---------- Typography ---------- */
.h1 {
  font-size: 28px;
  margin: 0;
  letter-spacing: -0.6px;
}
.h2 {
  font-size: 16px;
  margin: 0;
  letter-spacing: -0.2px;
}
.subhead {
  font-size: 12px;
  color: var(--muted);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 10px;
}

.subtle {
  color: var(--muted);
  margin: 6px 0 0;
}

/* ---------- Buttons / Inputs ---------- */
.btn {
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 14px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: transform 0.04s ease, background 0.15s ease, border-color 0.15s ease;
  user-select: none;
}

.btn:hover {
  background: color-mix(in srgb, var(--card) 88%, white 12%);
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: linear-gradient(180deg, var(--primary), var(--primary2));
  border-color: color-mix(in srgb, var(--primary2) 70%, black 30%);
  color: white;
  box-shadow: 0 10px 24px color-mix(in srgb, var(--primaryGlow) 60%, transparent);
}

.btn-primary:hover {
  filter: brightness(1.03);
}

.btn-secondary {
  background: color-mix(in srgb, var(--primary) 15%, var(--card));
  border-color: color-mix(in srgb, var(--primary) 30%, var(--border));
}

.btn-danger {
  background: color-mix(in srgb, var(--danger) 16%, var(--card));
  border-color: color-mix(in srgb, var(--danger) 35%, var(--border));
  color: var(--text);
}

.btn-ghost {
  background: transparent;
}

.btn-icon {
  padding: 8px 10px;
  border-radius: 12px;
  min-width: 44px;
  min-height: 44px;
  justify-content: center;
  font-size: 18px;
}

.btn-wide {
  padding-left: 18px;
  padding-right: 18px;
}

.btn-sm {
  padding: 8px 10px;
  border-radius: 12px;
  font-size: 13px;
}

.btn-block {
  width: 100%;
  justify-content: center;
}

.icon {
  font-size: 15px;
  line-height: 1;
}

.btn-text {
  font-size: 14px;
}

.label {
  font-size: 13px;
  font-weight: 700;
  color: var(--muted);
  margin-bottom: 6px;
  display: inline-block;
}

.input, .textarea, .select, .search-input {
  width: 100%;
  border: 1px solid var(--border);
  background: var(--card2);
  color: var(--text);
  border-radius: 14px;
  padding: 10px 12px;
  outline: none;
}

.textarea {
  resize: vertical;
  min-height: 110px;
}

.select {
  cursor: pointer;
}

.range {
  width: 100%;
  accent-color: var(--primary);
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  color: var(--text);
}
.checkbox input {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
}

.inline-actions {
  display: flex;
  gap: 10px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.form-row {
  margin-top: 12px;
}

.form-helper {
  margin-top: 6px;
  font-size: 0.85rem;
}

/* ---------- Nav ---------- */
.nav-item {
  width: 100%;
  text-align: left;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  border-radius: 16px;
  padding: 10px 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: background 0.15s ease, border-color 0.15s ease;
}
.nav-item:hover {
  background: color-mix(in srgb, var(--card) 70%, transparent);
}
.nav-item.is-active {
  background: color-mix(in srgb, var(--primary) 14%, var(--card));
  border-color: color-mix(in srgb, var(--primary) 35%, var(--border));
  box-shadow: 0 8px 20px color-mix(in srgb, var(--primaryGlow) 45%, transparent);
}
.nav-icon {
  width: 22px;
  display: inline-flex;
  justify-content: center;
}

/* ---------- Cards / Grid ---------- */
.grid {
  display: grid;
  gap: var(--gap2);
}

.grid-2 {
  grid-template-columns: 1fr 1fr;
}

.library-layout {
  grid-template-columns: 1fr;
  gap: var(--gap);
  grid-auto-flow: row;
}

.library-layout .card {
  box-shadow: none;
}

#import-section {
  scroll-margin-top: 110px;
}

@media (max-width: 1100px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius2);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.card-header {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.card-header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.card-body {
  padding: 16px;
}

.card-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

/* ---------- Chips / Pills / Tags ---------- */
.chip {
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 12px;
  border: 1px solid color-mix(in srgb, var(--primary) 30%, var(--border));
  background: var(--chip);
  color: var(--chipText);
  white-space: nowrap;
}

.pill {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--card2) 90%, transparent);
}

.pill-label {
  font-size: 11px;
  color: var(--muted);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.pill-value {
  font-weight: 800;
}

/* ---------- View switching ---------- */
.view {
  display: none;
}

.view.is-active {
  display: block;
}

.view-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 16px;
}

.view-header-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* ---------- Import Tabs ---------- */
.import-tabs {
  display: inline-flex;
  gap: 8px;
  margin-bottom: 10px;
}

.tab {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  padding: 8px 10px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 13px;
}
.tab.is-active {
  background: color-mix(in srgb, var(--primary) 14%, var(--card2));
  border-color: color-mix(in srgb, var(--primary) 32%, var(--border));
}

.tab-panel {
  margin-top: 10px;
}

/* ---------- File Drop ---------- */
.file-drop {
  border: 1px dashed color-mix(in srgb, var(--border) 70%, var(--muted));
  border-radius: var(--radius2);
  background: color-mix(in srgb, var(--card2) 86%, transparent);
  padding: 16px;
  cursor: pointer;
  min-height: 150px;
}

.file-drop:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.file-drop-inner {
  display: grid;
  gap: 10px;
  text-align: center;
}

.file-drop-title {
  font-weight: 900;
  letter-spacing: -0.2px;
}

.file-drop-sub {
  color: var(--muted);
  font-size: 13px;
}

.file-drop-actions {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.hint {
  margin-top: 12px;
  font-size: 13px;
  color: var(--muted);
}

/* ---------- Search ---------- */
.search {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 10px;
  color: var(--muted);
  font-size: 13px;
}

.search-input {
  padding-left: 28px;
  width: min(340px, 64vw);
}

/* ---------- Library List ---------- */
.book-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}

.book-item {
  margin: 0;
}

.book-card {
  width: 100%;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--card2) 88%, transparent);
  border-radius: 18px;
  padding: 12px;
  cursor: pointer;
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  text-align: left;
}

.book-card:hover {
  background: color-mix(in srgb, var(--card2) 78%, white 12%);
}

.book-meta {
  min-width: 0;
}

.book-title {
  font-weight: 900;
  letter-spacing: -0.2px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.book-title-row {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.book-badge {
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--danger) 18%, transparent);
  color: var(--danger);
  border: 1px solid color-mix(in srgb, var(--danger) 45%, transparent);
  white-space: nowrap;
}

.book-sub {
  font-size: 13px;
  color: var(--muted);
  margin-top: 2px;
}

.book-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.tag {
  font-size: 12px;
  padding: 4px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  background: transparent;
}

.book-progress {
  width: 120px;
  flex: 0 0 auto;
  display: grid;
  gap: 6px;
  align-items: end;
}

.progress-label {
  font-size: 12px;
  color: var(--muted);
  text-align: right;
}

.progress-bar {
  height: 10px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--border) 60%, transparent);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--primary2));
  border-radius: 999px;
}

/* ---------- Empty State ---------- */
.empty-state {
  border: 1px dashed color-mix(in srgb, var(--border) 70%, var(--muted));
  background: color-mix(in srgb, var(--card2) 86%, transparent);
  border-radius: var(--radius2);
  padding: 20px;
  margin-bottom: 14px;
  text-align: center;
}

.empty-title {
  font-weight: 900;
  font-size: 16px;
}

.empty-text {
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
}

.empty-actions {
  margin-top: 14px;
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- Mini Card ---------- */
.mini-card {
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--card2) 88%, transparent);
  border-radius: 18px;
  padding: 12px;
}

.mini-title {
  font-weight: 900;
  font-size: 13px;
}

.mini-text {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}

/* ---------- Reader Layout ---------- */
.reader-shell {
  display: flex;
  flex-direction: column;
  gap: calc(var(--gap2) + 8px);
}

.reader-main {
  display: grid;
  grid-template-columns: 1fr;
  gap: calc(var(--gap2) + 8px);
}

.reader-side {
  width: 100%;
}

.reader-stage-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.reader-book-title {
  font-weight: 950;
  letter-spacing: -0.3px;
}

.reader-stage-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.reader-stage-body {
  display: grid;
  gap: 14px;
}

.reader-page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.viewer-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.viewer-nav,
.viewer-zoom {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.viewer-page-input {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.viewer-page-total {
  font-size: 12px;
  color: var(--muted);
}

.viewer-scrub {
  flex: 1 1 200px;
  min-width: 180px;
}

.viewer-sync {
  font-size: 12px;
}

.input-xs {
  padding: 6px 8px;
  font-size: 13px;
  max-width: 80px;
}

.range-xs {
  height: 26px;
}

.document-viewer {
  display: grid;
  gap: 10px;
}

.viewer-status {
  font-size: 13px;
}

.viewer-stage {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 12px;
  background: color-mix(in srgb, var(--card2) 92%, transparent);
  min-height: 260px;
  position: relative;
}

.pdf-viewer,
.epub-viewer {
  width: 100%;
  min-height: 220px;
}

.pdf-viewer {
  display: block;
  position: relative;
  max-height: 75vh;
  /* Allow scroll/pan in zoomed PDFs while keeping touch gestures usable. */
  overflow: auto;
  touch-action: pan-x pan-y;
  cursor: grab;
  overscroll-behavior: contain;
}

.pdf-viewer.is-dragging {
  cursor: grabbing;
}

.pdf-overlay-controls {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-left: calc(12px + env(safe-area-inset-left));
  padding-right: calc(12px + env(safe-area-inset-right));
  pointer-events: none;
  z-index: 2;
}

.pdf-viewer[hidden] ~ .pdf-overlay-controls {
  display: none;
}

.pdf-overlay-btn {
  pointer-events: auto;
  min-width: 44px;
  min-height: 44px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--card) 85%, transparent);
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.18);
}

.pdf-overlay-btn:disabled {
  opacity: 0.4;
  box-shadow: none;
}

.pdf-canvas-wrap {
  display: inline-block;
  transform-origin: 0 0;
}

.pdf-canvas {
  width: auto;
  height: auto;
  max-width: none;
  border-radius: 12px;
  background: var(--card);
}

.reader-page:fullscreen {
  background: var(--bg);
  padding: 18px;
  overflow: auto;
}

.reader-page:fullscreen .reader-page-header,
body.viewer-fullscreen .reader-page-header {
  position: sticky;
  top: 0;
  z-index: 5;
  padding-top: 10px;
  padding-bottom: 10px;
  background: var(--bg);
  border-bottom: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
}

.reader-page:fullscreen .viewer-controls,
body.viewer-fullscreen .viewer-controls {
  width: 100%;
  justify-content: space-between;
  background: color-mix(in srgb, var(--card) 88%, transparent);
  padding: 8px 10px;
  border-radius: 14px;
  border: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
}

.reader-page:fullscreen .viewer-stage {
  max-height: none;
}

.reader-page:fullscreen .pdf-viewer {
  max-height: none;
  height: calc(100vh - 160px);
}

/* Pseudo-fullscreen for mobile browsers that block the Fullscreen API. */
body.viewer-fullscreen {
  overflow: hidden;
}

body.viewer-fullscreen .app-header,
body.viewer-fullscreen .sidebar,
body.viewer-fullscreen .app-footer,
body.viewer-fullscreen .reader-side {
  display: none;
}

body.viewer-fullscreen .reader-shell {
  grid-template-columns: 1fr;
}

body.viewer-fullscreen .reader-page {
  position: fixed;
  inset: 0;
  z-index: 200;
  margin: 0;
  border-radius: 0;
  box-shadow: none;
  background: var(--bg);
}

body.viewer-fullscreen .viewer-stage,
body.viewer-fullscreen .pdf-viewer {
  max-height: none;
  height: calc(100vh - 160px);
}

body.viewer-fullscreen .viewer-stage {
  padding-bottom: 8px;
}

.epub-viewer {
  height: 60vh;
  overflow: auto;
  font-family: var(--readerFontFamily);
}

.page-view {
  max-height: 60vh;
  overflow-y: auto;
  padding-right: 6px;
  font-size: 17px;
  line-height: 1.65;
  color: var(--text);
  font-family: var(--readerFontFamily);
}

.page-view p {
  margin: 0 0 14px;
}

.page-view p:last-child {
  margin-bottom: 0;
}

.reader-mode-toggle {
  display: inline-flex;
  align-items: center;
  background: color-mix(in srgb, var(--card2) 70%, transparent);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px;
  gap: 4px;
}

.segmented {
  border: none;
  background: transparent;
  color: var(--muted);
  padding: 6px 14px;
  border-radius: 999px;
  font-weight: 700;
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease, transform 160ms ease;
}

.segmented.is-active {
  background: var(--primary);
  color: white;
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.rsvp-frame {
  position: relative;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, color-mix(in srgb, var(--card2) 94%, white 6%), color-mix(in srgb, var(--card2) 92%, transparent));
  border-radius: var(--radius2);
  padding: 36px 32px;
  min-height: 320px;
  display: grid;
  place-items: center;
  overflow: hidden;
  max-width: 100%;
  width: 100%;
  margin: 0 auto;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  --rsvpMaxLeft: var(--maxLeft);
  --rsvpMaxRight: var(--maxRight);
  --rsvpWordScale: 1;
}

.pivot-line {
  position: absolute;
  top: 14px;
  bottom: 14px;
  left: 50%;
  width: 2px;
  background: color-mix(in srgb, var(--border) 70%, transparent);
  transform: translateX(-1px);
  opacity: 0.6;
}

.rsvp-word {
  display: flex;
  align-items: baseline;
  justify-content: center;
  width: 100%;
  max-width: 100%;
  font-size: var(--rsvpFontSize);
  font-weight: var(--rsvpFontWeight);
  font-family: var(--readerFontFamily);
  letter-spacing: -0.6px;
  line-height: 1.2;
  user-select: none;
  overflow: visible;
  white-space: nowrap;
  transform: scale(var(--rsvpWordScale));
  transform-origin: center;
  will-change: transform;
}

.rsvp-left {
  width: min(var(--rsvpMaxLeft), 50vw);
  min-width: 0;
  flex: 0 0 auto;
  text-align: right;
  padding-right: 0.25ch;
  opacity: 0.95;
  overflow: hidden;
}

.rsvp-pivot {
  color: var(--rsvpPivot);
  display: inline-block;
  min-width: 0.65ch;
  text-align: center;
  transform: translateY(1px);
  text-shadow: 0 0 14px color-mix(in srgb, var(--rsvpPivot) 30%, transparent);
}

.rsvp-right {
  width: min(var(--rsvpMaxRight), 50vw);
  min-width: 0;
  flex: 0 0 auto;
  text-align: left;
  padding-left: 0.25ch;
  opacity: 0.95;
  overflow: hidden;
}

.rsvp-subline {
  margin-top: 10px;
  font-size: 13px;
  text-align: center;
}

.reader-progress {
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--card2) 90%, transparent);
  border-radius: 18px;
  padding: 12px;
  display: grid;
  gap: 8px;
}

.range-scrub {
  height: 36px;
}

.progress-meta {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.bookmark-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
}

.bookmark-item {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 10px;
  background: color-mix(in srgb, var(--card2) 85%, transparent);
}

.bookmark-button {
  border: none;
  background: transparent;
  color: inherit;
  text-align: left;
  width: 100%;
  cursor: pointer;
  display: grid;
  gap: 4px;
}

.bookmark-meta {
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
}

@media (max-width: 1100px) {
  .viewer-controls {
    justify-content: flex-start;
  }
}

.btn.is-loading::after {
  content: "";
  display: inline-block;
  width: 14px;
  height: 14px;
  margin-left: 8px;
  border-radius: 50%;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-top-color: transparent;
  animation: button-spin 0.8s linear infinite;
  vertical-align: middle;
}

@keyframes button-spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.reader-controls {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.reader-sliders {
  display: grid;
  gap: 10px;
}

.slider-row {
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--card2) 90%, transparent);
  border-radius: 18px;
  padding: 12px;
}

.slider-meta {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
}

.reader-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

@media (max-width: 720px) {
  .reader-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .reader-controls .btn-primary {
    min-width: 180px;
    min-height: 52px;
    font-size: 17px;
    padding: 12px 20px;
  }
  .reader-page-header {
    flex-direction: column;
    align-items: flex-start;
  }
  .viewer-controls {
    width: 100%;
  }
  :root {
    --rsvpFontSize: 42px;
    --maxLeft: 13ch;
    --maxRight: 20ch;
  }

  .page-view {
    max-height: 55vh;
    font-size: 16px;
  }

  .viewer-controls {
    justify-content: flex-start;
  }

  .viewer-scrub {
    order: 3;
    flex-basis: 100%;
  }

  .rsvp-word {
    justify-content: center;
  }

  .rsvp-left,
  .rsvp-right {
    width: auto;
    max-width: 45vw;
    flex: 0 1 auto;
  }
}

@media (max-width: 480px) {
  :root {
    --rsvpFontSize: 36px;
    --maxLeft: 12ch;
    --maxRight: 16ch;
  }
}

@media (max-width: 360px) {
  :root {
    --rsvpFontSize: 32px;
    --maxLeft: 10ch;
    --maxRight: 14ch;
  }
}

.stat {
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--card2) 92%, transparent);
  border-radius: 18px;
  padding: 12px;
}

.stat-label {
  font-size: 12px;
  color: var(--muted);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.stat-value {
  margin-top: 8px;
  font-weight: 950;
  letter-spacing: -0.2px;
}

.reader-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

/* Keyboard hint tags */
kbd {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--card2) 88%, transparent);
  padding: 2px 6px;
  border-radius: 8px;
  font-size: 12px;
}

/* ---------- Notes ---------- */
.note-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}

.note-item {
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--card2) 92%, transparent);
  border-radius: 18px;
  padding: 12px;
}

.note-item-title {
  font-weight: 900;
  word-break: break-word;
}

.note-item-sub {
  margin-top: 4px;
  font-size: 12px;
  color: var(--muted);
}

.note-preview {
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--card2) 92%, transparent);
  border-radius: 18px;
  padding: 12px;
  margin-bottom: 12px;
}

.note-preview-text {
  margin-top: 8px;
  font-weight: 650;
  word-break: break-word;
  font-family: var(--readerFontFamily);
}

/* ---------- Misc ---------- */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 14px 0;
}

.notice {
  border: 1px solid color-mix(in srgb, var(--primary) 25%, var(--border));
  background: color-mix(in srgb, var(--primary) 10%, var(--card2));
  border-radius: 18px;
  padding: 12px;
}

.notice-title {
  font-weight: 950;
  margin-bottom: 6px;
}

.notice-text {
  color: var(--muted);
  font-size: 13px;
}

.danger-zone {
  border: 1px solid color-mix(in srgb, var(--danger) 30%, var(--border));
  background: color-mix(in srgb, var(--danger) 8%, var(--card2));
  border-radius: 18px;
  padding: 12px;
}

.danger-title {
  font-weight: 950;
}

.app-footer {
  padding: 14px 18px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 12px;
}

.linklike {
  background: transparent;
  border: none;
  color: var(--muted);
  cursor: pointer;
  padding: 6px 8px;
  border-radius: 10px;
}
.linklike:hover {
  background: color-mix(in srgb, var(--card2) 86%, transparent);
  color: var(--text);
}

.list {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--muted);
}
.list li {
  margin: 6px 0;
}

/* ---------- Modal ---------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
   place-items: center;
  padding: 18px;
}

.modal[hidden] {
  display: none;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.55);
}

.modal-card {
  position: relative;
  width: min(720px, 96vw);
  border-radius: var(--radius2);
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.modal-header,
.modal-footer {
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.modal-header {
  border-bottom: 1px solid var(--border);
}

.modal-footer {
  border-top: 1px solid var(--border);
}

.modal-body {
  padding: 16px;
}

/* Close icon alignment */
.modal-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* ---------- Fatal Banner ---------- */
.fatal-banner {
  position: sticky;
  top: 0;
  z-index: 70;
  width: 100%;
  padding: 10px 16px;
  background: color-mix(in srgb, var(--danger) 20%, var(--card));
  border-bottom: 1px solid color-mix(in srgb, var(--danger) 45%, var(--border));
  color: var(--text);
  font-weight: 600;
}

.fatal-banner-text {
  max-width: 1200px;
  margin: 0 auto;
}

/* ---------- Toast / Status (optional hooks for JS later) ---------- */
.toast {
  position: relative;
  width: min(360px, 92vw);
  border-radius: 18px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--card) 92%, transparent);
  box-shadow: var(--shadow);
  padding: 12px 14px;
  display: grid;
  gap: 6px;
}

.toast[data-type="success"] {
  border-color: color-mix(in srgb, var(--primary) 35%, var(--border));
  background: color-mix(in srgb, var(--primary) 12%, var(--card));
}

.toast[data-type="error"] {
  border-color: color-mix(in srgb, var(--danger) 40%, var(--border));
  background: color-mix(in srgb, var(--danger) 12%, var(--card));
}

.toast[data-type="info"] {
  border-color: color-mix(in srgb, var(--warning) 30%, var(--border));
  background: color-mix(in srgb, var(--warning) 10%, var(--card));
}

.toast-region {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 60;
  display: grid;
  gap: 10px;
  justify-items: end;
}

@media (max-width: 720px) {
  .toast-region {
    right: 50%;
    transform: translateX(50%);
    bottom: 14px;
    justify-items: center;
  }
}

.toast-title {
  font-weight: 950;
}

.toast-text {
  color: var(--muted);
  font-size: 13px;
}

.toast-actions {
  display: flex;
  gap: 10px;
  margin-top: 8px;
  flex-wrap: wrap;
}

/* ---------- Small Helpers ---------- */
.row {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.spacer {
  flex: 1 1 auto;
}

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

.right {
  text-align: right;
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    transition: none !important;
    animation: none !important;
  }
}