/* CSS Variables for Light / Dark Mode */
:root {
  --bg-primary: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-subtle: #f1f5f9;
  --bg-input: #ffffff;
  --border-color: #e2e8f0;
  --border-focus: #3b82f6;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --brand-primary: #2563eb;
  --brand-primary-hover: #1d4ed8;
  --brand-light: #eff6ff;
  --brand-text: #1e40af;

  --verse-num-bg: #e0e7ff;
  --verse-num-text: #3730a3;
  --verse-highlight: #fef08a;

  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.08), 0 2px 4px -2px rgb(0 0 0 / 0.06);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.08), 0 4px 6px -4px rgb(0 0 0 / 0.04);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --font-sans: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
  --font-serif: 'Noto Serif KR', serif;

  --verse-font-size: 1.125rem;
  --verse-line-height: 1.85;
}

[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-surface: #1e293b;
  --bg-surface-subtle: #334155;
  --bg-input: #1e293b;
  --border-color: #334155;
  --border-focus: #60a5fa;

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;

  --brand-primary: #3b82f6;
  --brand-primary-hover: #60a5fa;
  --brand-light: #1e3a5f;
  --brand-text: #bfdbfe;

  --verse-num-bg: #312e81;
  --verse-num-text: #c7d2fe;
  --verse-highlight: #854d0e;

  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4);
}

/* Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  transition: background-color 0.25s ease, color 0.25s ease;
  -webkit-font-smoothing: antialiased;
}

/* Layout */
.app-container {
  max-width: 860px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

/* Header */
.header {
  margin-bottom: 24px;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  font-size: 2rem;
  line-height: 1;
}

.logo-title {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.logo-desc {
  font-size: 0.825rem;
  color: var(--text-muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

.icon-btn:hover {
  background: var(--bg-surface-subtle);
  border-color: var(--brand-primary);
}

/* Card */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  margin-bottom: 24px;
  overflow: hidden;
  transition: all 0.2s ease;
}

/* Tabs */
.tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-surface-subtle);
}

.tab-btn {
  flex: 1;
  padding: 14px 16px;
  background: transparent;
  border: none;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
  border-bottom: 2px solid transparent;
}

.tab-btn.active {
  background: var(--bg-surface);
  color: var(--brand-primary);
  border-bottom: 2px solid var(--brand-primary);
}

.tab-pane {
  display: none;
  padding: 20px;
}

.tab-pane.active {
  display: block;
}

/* Forms */
.search-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.input-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.search-input-wrapper {
  position: relative;
  flex: 1;
  min-width: 240px;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 14px;
  color: var(--text-muted);
  pointer-events: none;
  font-size: 1rem;
}

.search-input-wrapper input {
  width: 100%;
  padding: 12px 38px 12px 42px;
  font-family: inherit;
  font-size: 1rem;
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.search-input-wrapper input:focus {
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.clear-btn {
  position: absolute;
  right: 12px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.9rem;
  padding: 4px;
}

.clear-btn:hover {
  color: var(--text-primary);
}

.styled-select, .styled-input {
  font-family: inherit;
  font-size: 0.95rem;
  padding: 12px 14px;
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color 0.2s;
}

.styled-select:focus, .styled-input:focus {
  border-color: var(--brand-primary);
}

.version-select-wrapper select {
  min-width: 140px;
}

/* Primary Button */
.primary-btn {
  background: var(--brand-primary);
  color: #ffffff;
  border: none;
  padding: 12px 22px;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: background-color 0.2s, transform 0.1s;
  white-space: nowrap;
}

.primary-btn:hover {
  background: var(--brand-primary-hover);
}

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

/* Dropdown Selector Grid */
.selector-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 12px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.verse-range-inputs {
  display: flex;
  align-items: center;
  gap: 6px;
}

.styled-input.small {
  width: 100%;
  padding: 10px 8px;
  text-align: center;
}

.range-sep {
  color: var(--text-muted);
  font-weight: bold;
}

.selector-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 12px;
}

/* Quick Chips */
.quick-chips-wrapper {
  padding: 14px 20px 18px;
  border-top: 1px solid var(--border-color);
  background: var(--bg-surface-subtle);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.chips-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.chips-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.chip-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 5px 10px;
  font-size: 0.825rem;
  font-family: inherit;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.15s;
}

.chip-btn:hover {
  border-color: var(--brand-primary);
  color: var(--brand-primary);
  background: var(--brand-light);
}

/* Status Views */
.status-box {
  padding: 36px 20px;
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  text-align: center;
  margin-bottom: 24px;
}

.loading-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3.5px solid var(--border-color);
  border-top-color: var(--brand-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.status-msg {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.error-box {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #991b1b;
}

[data-theme="dark"] .error-box {
  background: #450a0a;
  border-color: #7f1d1d;
  color: #fecaca;
}

.status-icon {
  font-size: 2rem;
}

.error-content h3 {
  font-size: 1.05rem;
  margin-bottom: 4px;
}

.error-content p {
  font-size: 0.9rem;
  opacity: 0.9;
}

/* Result Card */
.result-card {
  padding: 24px;
}

.result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-bottom: 18px;
  border-bottom: 1.5px solid var(--border-color);
}

.result-title-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.result-ref {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.badges {
  display: flex;
  gap: 6px;
}

.badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
}

.version-badge {
  background: var(--brand-light);
  color: var(--brand-text);
  border: 1px solid rgba(37, 99, 235, 0.2);
}

.testament-badge {
  background: var(--bg-surface-subtle);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.result-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.font-size-controls {
  display: flex;
  align-items: center;
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 2px;
}

.small-ctrl-btn {
  background: transparent;
  border: none;
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 4px 8px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s;
}

.small-ctrl-btn:hover {
  background: var(--bg-surface);
  color: var(--text-primary);
}

.font-size-text {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 0 4px;
}

/* Verses Container */
.verses-container {
  padding: 24px 4px;
  font-family: var(--font-serif);
  font-size: var(--verse-font-size);
  line-height: var(--verse-line-height);
  letter-spacing: -0.01em;
}

.verse-item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  transition: background-color 0.15s;
}

.verse-item:hover {
  background-color: var(--bg-surface-subtle);
}

.verse-num {
  font-family: var(--font-sans);
  font-size: 0.825rem;
  font-weight: 700;
  color: var(--verse-num-text);
  background: var(--verse-num-bg);
  min-width: 26px;
  height: 26px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  user-select: none;
}

.verse-text {
  flex: 1;
  color: var(--text-primary);
  word-break: keep-all;
}

/* Result Footer */
.result-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

.nav-buttons {
  display: flex;
  gap: 8px;
}

.nav-btn {
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 8px 14px;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s;
}

.nav-btn:hover:not(:disabled) {
  background: var(--bg-surface);
  border-color: var(--brand-primary);
  color: var(--brand-primary);
}

.nav-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.share-buttons {
  display: flex;
  gap: 8px;
}

.action-btn {
  border: 1px solid var(--border-color);
  background: var(--bg-surface);
  color: var(--text-primary);
  padding: 9px 16px;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
}

.action-btn:hover {
  background: var(--bg-surface-subtle);
  border-color: var(--brand-primary);
}

.action-btn.copy-btn {
  background: var(--brand-primary);
  color: #ffffff;
  border-color: var(--brand-primary);
}

.action-btn.copy-btn:hover {
  background: var(--brand-primary-hover);
}

/* Footer Info */
.footer-info {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.footer-info a {
  color: var(--brand-primary);
  text-decoration: none;
}

.footer-info a:hover {
  text-decoration: underline;
}

.footer-info .copyright {
  margin-top: 4px;
  opacity: 0.8;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: #1e293b;
  color: #f8fafc;
  padding: 10px 20px;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  pointer-events: none;
  opacity: 0;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s;
  z-index: 1000;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* Print Styles */
@media print {
  body {
    background: #ffffff !important;
    color: #000000 !important;
  }

  .header, .search-card, .result-controls, .result-footer, .footer-info, .toast {
    display: none !important;
  }

  .card {
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important;
  }

  .verses-container {
    font-size: 11pt !important;
    line-height: 1.6 !important;
  }

  .verse-num {
    background: none !important;
    color: #000000 !important;
    font-weight: bold !important;
  }
}

/* Mobile Responsiveness */
@media (max-width: 640px) {
  .app-container {
    padding: 16px 12px 36px;
  }

  .logo-title {
    font-size: 1.15rem;
  }

  .tab-btn {
    font-size: 0.875rem;
    padding: 12px 8px;
  }

  .input-row {
    flex-direction: column;
    align-items: stretch;
  }

  .search-input-wrapper {
    min-width: 100%;
  }

  .version-select-wrapper select {
    width: 100%;
  }

  .search-submit-btn {
    width: 100%;
  }

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

  .result-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .result-controls {
    width: 100%;
    justify-content: space-between;
  }

  .result-footer {
    flex-direction: column;
    align-items: stretch;
  }

  .nav-buttons, .share-buttons {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
}