:root {
  --bg: #f4f1ea;
  --surface: #ffffff;
  --ink: #1f2a44;
  --ink-soft: #5b6478;
  --accent: #3a5a9b;
  --accent-soft: #e8edf9;
  --know: #2f9e63;
  --know-soft: #e4f6ec;
  --learning: #c9822c;
  --learning-soft: #fbeedd;
  --danger: #c0392b;
  --danger-soft: #fbe8e6;
  --border: #e4dfd3;
  --shadow: 0 10px 30px rgba(31, 42, 68, 0.12);
  --radius: 18px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14181f;
    --surface: #1d2330;
    --ink: #eef1f8;
    --ink-soft: #a6adc0;
    --accent: #7fa0e0;
    --accent-soft: #26314a;
    --know: #57c98b;
    --know-soft: #1c3327;
    --learning: #e0a054;
    --learning-soft: #3a2c1a;
    --danger: #e5786a;
    --danger-soft: #3a2320;
    --border: #2b3242;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #14181f;
  --surface: #1d2330;
  --ink: #eef1f8;
  --ink-soft: #a6adc0;
  --accent: #7fa0e0;
  --accent-soft: #26314a;
  --know: #57c98b;
  --know-soft: #1c3327;
  --learning: #e0a054;
  --learning-soft: #3a2c1a;
  --danger: #e5786a;
  --danger-soft: #3a2320;
  --border: #2b3242;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.app {
  max-width: 640px;
  margin: 0 auto;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  padding: env(safe-area-inset-top) 16px env(safe-area-inset-bottom);
}

.topbar {
  padding: 20px 4px 12px;
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 5;
}

.topbar-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 0 0 12px;
}

.topbar h1 {
  margin: 0;
  font-size: 1.4rem;
  letter-spacing: -0.01em;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.icon-btn {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink);
  border-radius: 999px;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  line-height: 1;
}

.icon-btn:active {
  transform: scale(0.94);
}

.profile-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin: 0 4px 10px;
}

.profile-label {
  font-size: 0.82rem;
  color: var(--ink-soft);
}

.profile-label strong {
  color: var(--ink);
}

.profile-switch-btn {
  flex-shrink: 0;
  border: none;
  background: none;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  padding: 2px 4px;
}

.profile-list {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 200px;
  overflow-y: auto;
}

.profile-list:empty {
  display: none;
}

.profile-list-item {
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--ink);
  font-size: 0.92rem;
  cursor: pointer;
}

.profile-list-item.is-active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
}

.tabs {
  display: flex;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px;
}

.tab-btn {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--ink-soft);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 9px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

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

main { flex: 1; padding-bottom: 24px; }

.view[hidden] { display: none; }

.progress-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 4px 4px 18px;
}

.progress-bar {
  flex: 1;
  height: 8px;
  background: var(--accent-soft);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: var(--know);
  border-radius: 999px;
  transition: width 0.3s ease;
}

.progress-label {
  font-size: 0.82rem;
  color: var(--ink-soft);
  white-space: nowrap;
}

.card {
  perspective: 1400px;
  height: 340px;
  margin: 0 4px 18px;
  cursor: pointer;
  outline: none;
}

.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.5s cubic-bezier(0.2, 0.8, 0.3, 1);
}

.card.is-flipped .card-inner {
  transform: rotateY(180deg);
}

.card-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 32px 26px;
  gap: 14px;
}

.card-back {
  transform: rotateY(180deg);
  overflow-y: auto;
}

.card-hint {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent);
}

.card-reference {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0;
  line-height: 1.3;
}

.card-tap-hint {
  color: var(--ink-soft);
  font-size: 0.82rem;
}

.card-text {
  font-size: 1.08rem;
  line-height: 1.55;
  margin: 0;
}

.card-reference-back {
  color: var(--accent);
  font-weight: 700;
  margin: 4px 0 0;
  font-size: 0.95rem;
}

.progress-panel {
  margin: 0 4px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
}

.progress-panel[hidden] { display: none; }

.progress-phase-label {
  margin: 0;
  font-weight: 700;
  color: var(--accent);
  font-size: 0.95rem;
}

.progress-action {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  width: 100%;
}

.tally-count {
  display: inline-block;
  margin-left: 4px;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.35);
  font-size: 0.85rem;
  font-weight: 700;
}

.progress-done-msg {
  margin: 0;
  font-size: 0.95rem;
  color: var(--ink-soft);
}

.btn {
  border: none;
  border-radius: 14px;
  padding: 14px 16px;
  font-size: 0.98rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.1s ease, opacity 0.15s ease;
}

.btn:active { transform: scale(0.97); }

.btn-tally {
  width: 100%;
  background: var(--accent-soft);
  color: var(--accent);
}

.btn-know {
  width: 100%;
  background: var(--know-soft);
  color: var(--know);
}

.deck-controls {
  display: flex;
  gap: 10px;
  margin: 0 4px 10px;
}

.deck-controls:last-child {
  margin-bottom: 0;
}

.btn-secondary {
  flex: 1;
  background: var(--accent-soft);
  color: var(--accent);
}

.btn-ghost {
  flex: 1;
  background: transparent;
  color: var(--ink-soft);
  border: 1px solid var(--border);
}

.nav-buttons {
  display: flex;
  gap: 10px;
  width: 100%;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  padding: 14px 22px;
}

.empty-state {
  margin: 40px 4px;
  text-align: center;
  padding: 40px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.empty-state p {
  font-size: 1.05rem;
  margin: 0 0 18px;
}

.browse-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 4px 4px 8px;
}

.search-input {
  flex: 1;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink);
  font-size: 1rem;
}

.add-verse-btn {
  flex: 0 0 auto;
  padding: 12px 16px;
  white-space: nowrap;
}

.form-label {
  display: block;
  margin: 14px 0 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink-soft);
  text-align: left;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--ink);
  font-size: 0.95rem;
  font-family: inherit;
  resize: vertical;
}

.form-error {
  margin: 12px 0 0;
  color: var(--danger);
  font-size: 0.85rem;
}

#add-verse-category-custom {
  margin-top: 8px;
}

.verse-list {
  list-style: none;
  margin: 0;
  padding: 0 4px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.verse-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px 16px;
  cursor: pointer;
}

.verse-item:hover,
.verse-item:focus-visible {
  border-color: var(--accent);
  outline: none;
}

.verse-item-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.verse-item-checkbox {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  accent-color: var(--accent);
  cursor: pointer;
}

.select-all-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 12px;
  margin: 0 4px 14px;
}

.select-all-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
}

.select-all-label input {
  width: 20px;
  height: 20px;
  accent-color: var(--accent);
  cursor: pointer;
}

.browse-filter-select {
  font-size: 0.82rem;
  padding: 6px 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
}

.selected-count-label {
  margin-left: auto;
  font-size: 0.8rem;
  color: var(--ink-soft);
}

.verse-item-ref {
  flex: 1;
  min-width: 0;
  font-weight: 700;
  font-size: 1rem;
  color: var(--accent);
}

.verse-item-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.verse-item-delete,
.verse-item-edit {
  border: none;
  width: 24px;
  height: 24px;
  border-radius: 999px;
  font-size: 0.8rem;
  line-height: 1;
  cursor: pointer;
  flex-shrink: 0;
}

.verse-item-delete {
  background: var(--danger-soft);
  color: var(--danger);
}

.verse-item-edit {
  background: var(--accent-soft);
  color: var(--accent);
}

.verse-item-badge {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 999px;
  white-space: nowrap;
}

.verse-item-badge.know {
  background: var(--know-soft);
  color: var(--know);
}

.verse-item-badge.learning {
  background: var(--learning-soft);
  color: var(--learning);
}

.verse-item-category {
  display: inline-block;
  margin-top: 8px;
  padding: 2px 9px;
  border-radius: 999px;
  background: var(--border);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--ink-soft);
}

.btn-danger {
  flex: 1;
  background: var(--danger-soft);
  color: var(--danger);
}

.confirm-overlay {
  position: fixed;
  inset: 0;
  background: rgba(20, 24, 31, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 20;
}

.confirm-overlay[hidden] { display: none; }

.confirm-dialog {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  max-width: 360px;
  width: 100%;
}

.confirm-dialog-title {
  margin: 0 0 8px;
  font-size: 1.05rem;
  font-weight: 700;
}

.confirm-dialog-body {
  margin: 0 0 18px;
  color: var(--ink-soft);
  font-size: 0.92rem;
  line-height: 1.45;
}

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

.radio-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 4px 0 18px;
}

.radio-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg);
  font-size: 0.92rem;
  color: var(--ink);
  cursor: pointer;
}

.radio-option input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  cursor: pointer;
  flex-shrink: 0;
}

.radio-option:has(input:checked) {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}

.btn-full {
  width: 100%;
}

.help-dialog {
  max-width: 420px;
  max-height: 82vh;
  display: flex;
  flex-direction: column;
}

.help-body {
  overflow-y: auto;
  min-height: 0;
  margin-bottom: 16px;
}

.help-body p {
  margin: 0 0 12px;
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--ink);
}

.help-body p:last-child {
  margin-bottom: 0;
}

.help-body strong {
  color: var(--accent);
}

.help-section-title {
  margin: 20px 0 12px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent);
}