:root {
  --color-bg: #f1f5f9;
  --color-surface: #ffffff;
  --color-border: #e2e8f0;
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-header: #0f172a;
  --color-success: #059669;
  --color-success-hover: #047857;
  --color-warning: #d97706;
  --toolbar-bg: rgba(255, 255, 255, 0.92);
  --color-placeholder: #94a3b8;
  --color-card-hover-border: #cbd5e1;
  --focus-ring-accent: rgba(37, 99, 235, 0.2);
  --btn-source-hover-bg: #f8fafc;
  --modal-shadow: 0 24px 48px rgba(15, 23, 42, 0.15);
  --btn-queue-share-bg: #0f172a;
  --btn-queue-share-text: #ffffff;
  --btn-queue-share-hover: #334155;
  --btn-queue-clear-hover-bg: #fef2f2;
  --btn-queue-clear-hover-border: #fecaca;
  --btn-queue-clear-hover-text: #991b1b;
  --btn-remove-hover-bg: #fef2f2;
  --btn-remove-hover-text: #b91c1c;
  --dropdown-item-hover-bg: #f1f5f9;
  --radius-sm: 8px;
  --radius-md: 12px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
  --font: 'DM Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  /* Align Bootstrap reboot with our theme (Bootstrap loads before this file) */
  --bs-body-bg: var(--color-bg);
  --bs-body-color: var(--color-text);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #06080c;
    --color-surface: #1a2332;
    --color-border: #2d3a4d;
    --color-text: #e8eef7;
    --color-text-muted: #94a3b8;
    --color-accent: #60a5fa;
    --color-accent-hover: #93c5fd;
    --color-header: #0a0e14;
    --color-success: #34d399;
    --color-success-hover: #10b981;
    --toolbar-bg: rgba(15, 20, 28, 0.92);
    --color-placeholder: #7c8c9e;
    --color-card-hover-border: #3d4f66;
    --focus-ring-accent: rgba(96, 165, 250, 0.35);
    --btn-source-hover-bg: #243044;
    --modal-shadow: 0 24px 48px rgba(0, 0, 0, 0.55);
    --btn-queue-share-bg: #334155;
    --btn-queue-share-text: #f8fafc;
    --btn-queue-share-hover: #475569;
    --btn-queue-clear-hover-bg: rgba(239, 68, 68, 0.12);
    --btn-queue-clear-hover-border: #7f1d1d;
    --btn-queue-clear-hover-text: #fecaca;
    --btn-remove-hover-bg: rgba(239, 68, 68, 0.12);
    --btn-remove-hover-text: #fca5a5;
    --dropdown-item-hover-bg: #243044;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.45);
  }
}

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

html {
  scroll-behavior: smooth;
  color-scheme: light dark;
  background-color: var(--color-bg);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-bg);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0.5rem;
  z-index: 10000;
  padding: 0.5rem 1rem;
  background: var(--color-accent);
  color: #fff;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
}

.skip-link:focus {
  left: 0.5rem;
  outline: 2px solid #fff;
  outline-offset: 2px;
}

/* Header */
.app-header {
  background: var(--color-header);
  color: #f8fafc;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.app-header__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 1.25rem;
}

.app-brand {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.app-brand__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.1);
  color: #93c5fd;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.app-brand__title {
  margin: 0 0 0.25rem;
  font-size: clamp(1.35rem, 4vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: inherit;
}

.app-brand__tagline {
  margin: 0;
  font-size: 0.9rem;
  color: #94a3b8;
  font-weight: 400;
  max-width: 36rem;
}

/* Toolbar */
.toolbar {
  position: sticky;
  top: 0;
  /* Above song list / stacking contexts so dropdown menus paint on top */
  z-index: 1030;
  background: var(--toolbar-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.toolbar__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.875rem 1.25rem;
  min-width: 0;
  overflow: visible;
}

.sticky-search {
  padding: 0;
}

.search-bar {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
}

/* Scroll only the search + icon buttons; library dropdown stays outside (avoids clipping the menu) */
.search-bar__scroll {
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 0.5rem;
  overflow-x: auto;
  overflow-y: visible;
  -webkit-overflow-scrolling: touch;
}

.search-bar__scroll > .btn-icon {
  flex-shrink: 0;
}

/* Not using Bootstrap’s .input-group (it flattens corners when only one control is left) */
.search-bar__field {
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  align-items: stretch;
}

.search-bar .search-input {
  flex: 1;
  min-width: 0;
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.65rem 1rem;
  font-size: 1rem;
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  /* Even corners + avoid WebKit search field flattening one side */
  -webkit-appearance: none;
  appearance: none;
}

.search-bar .search-input.form-control {
  border-top-left-radius: var(--radius-md);
  border-top-right-radius: var(--radius-md);
  border-bottom-left-radius: var(--radius-md);
  border-bottom-right-radius: var(--radius-md);
}

.search-bar .search-input::placeholder {
  color: var(--color-placeholder);
}

.search-bar .search-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--focus-ring-accent);
}

.btn-icon {
  box-sizing: border-box;
  min-width: 44px;
  width: auto;
  height: 44px;
  min-height: 44px;
  max-height: 44px;
  padding: 0 0.75rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-weight: 600;
  line-height: 1;
}

.search-bar .btn-primary {
  background: var(--color-accent);
  border: none;
  color: #fff;
}

.search-bar .btn-primary:hover {
  background: var(--color-accent-hover);
  color: #fff;
}

.search-bar .btn-primary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Library dropdown (two independent checkboxes; merged list when both on) */
.library-dropdown-wrap {
  position: relative;
  flex: 0 0 auto;
  min-width: 0;
  z-index: 1;
}

.library-dropdown-wrap .dropdown-menu {
  z-index: 1060;
}

.btn-library {
  border: 1px solid var(--color-border) !important;
  background: var(--color-surface) !important;
  color: var(--color-text) !important;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0 0.5rem 0 0.65rem !important;
  font-weight: 600;
  font-size: 0.875rem;
  max-width: 11rem;
  min-height: 44px;
}

.btn-library:hover,
.btn-library:focus {
  background: var(--btn-source-hover-bg) !important;
  color: var(--color-text) !important;
}

.search-bar .btn-library.dropdown-toggle::after {
  margin-top: 0;
  margin-bottom: 0;
  flex-shrink: 0;
}

.btn-library__summary {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.library-dropdown {
  min-width: 14rem;
  padding: 0.5rem !important;
  background: var(--color-surface);
}

.library-dropdown__row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  padding: 0.5rem 0.65rem;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  border: 1px solid transparent;
  width: 100%;
  box-sizing: border-box;
}

.library-dropdown__row:hover {
  background: var(--dropdown-item-hover-bg);
}

.library-dropdown__row .form-check-input {
  margin: 0;
  flex-shrink: 0;
  accent-color: var(--color-accent);
}

.library-dropdown li + li {
  margin-top: 0.25rem;
}

.empty-libraries {
  text-align: center;
  padding: 2.5rem 1.5rem;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  font-weight: 500;
  max-width: 24rem;
  margin: 0 auto;
}

.main-wrap {
  position: relative;
  z-index: 0;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem 2rem;
}

/* Song list */
.song-grid {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
  padding: 1rem 0 0;
}

.song-card {
  display: grid;
  grid-template-columns: 72px 1fr auto;
  align-items: center;
  gap: 0.75rem 1rem;
  padding: 0.75rem 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.song-card:hover {
  border-color: var(--color-card-hover-border);
  box-shadow: var(--shadow-md);
}

.song-number {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 0.8125rem;
  color: var(--color-accent);
  letter-spacing: 0.02em;
}

.song-name {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  word-break: break-word;
}

.btn-add {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: none;
  background: var(--color-success);
  color: #fff;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.15s ease, transform 0.15s ease;
}

.btn-add:hover {
  background: var(--color-success-hover);
}

.btn-add:focus-visible {
  outline: 2px solid var(--color-success);
  outline-offset: 2px;
}

.btn-add.added {
  animation: btnAdded 0.35s ease;
}

@keyframes btnAdded {
  50% {
    transform: scale(1.06);
  }
}

.loading {
  text-align: center;
  padding: 1.5rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

/* Modal */
.modal {
  --bs-modal-bg: var(--color-surface);
  --bs-modal-color: var(--color-text);
  --bs-modal-border-color: var(--color-border);
}

.modal-content {
  border: none;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: var(--modal-shadow);
}

@media (prefers-color-scheme: dark) {
  .modal-header .btn-close {
    filter: invert(1);
    opacity: 0.85;
  }

  .modal-header .btn-close:hover {
    opacity: 1;
  }
}

.modal-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.modal-title {
  font-weight: 700;
  color: var(--color-text);
}

.modal-body {
  padding: 1.25rem;
  background: var(--color-bg);
}

.queue-hint {
  margin: 0 0 1rem;
  font-size: 0.8125rem;
  line-height: 1.45;
  color: var(--color-text-muted);
}

.queue-toolbar {
  display: flex;
  flex-direction: row;
  align-items: stretch;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.queue-toolbar__btn {
  flex: 1 1 0;
  min-width: 0;
}

.queue-toolbar .dropdown {
  display: flex;
}

.queue-toolbar .dropdown > .btn-queue-action {
  width: 100%;
}

.btn-queue-action {
  box-sizing: border-box;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 0.75rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.9375rem;
  line-height: 1.2;
  border: 1px solid transparent;
}

.btn-queue-action--share {
  background: var(--btn-queue-share-bg);
  color: var(--btn-queue-share-text);
  border-color: var(--btn-queue-share-bg);
}

.btn-queue-action--share:hover,
.btn-queue-action--share:focus-visible {
  background: var(--btn-queue-share-hover);
  border-color: var(--btn-queue-share-hover);
  color: var(--btn-queue-share-text);
}

.btn-queue-action--clear {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.btn-queue-action--clear:hover,
.btn-queue-action--clear:focus-visible {
  background: var(--btn-queue-clear-hover-bg);
  border-color: var(--btn-queue-clear-hover-border);
  color: var(--btn-queue-clear-hover-text);
}

@media (max-width: 380px) {
  .queue-toolbar {
    flex-direction: column;
  }

  .queue-toolbar__btn {
    flex: none;
    width: 100%;
  }
}

.queue-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: min(52vh, 420px);
  overflow-y: auto;
  padding: 0.125rem;
}

.queue-card {
  display: grid;
  grid-template-columns: 64px 1fr auto;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.queue-number {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 0.8125rem;
  color: var(--color-accent);
}

.queue-name {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  word-break: break-word;
}

.btn-remove {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color 0.15s ease, background 0.15s ease;
}

.btn-remove:hover {
  background: var(--btn-remove-hover-bg);
  color: var(--btn-remove-hover-text);
}

.btn-remove:focus-visible {
  outline: 2px solid var(--btn-remove-hover-text);
  outline-offset: 2px;
}

.empty-queue {
  text-align: center;
  padding: 2.5rem 1rem;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(120%);
  max-width: min(90vw, 360px);
  padding: 0.875rem 1.25rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 600;
  font-size: 0.9375rem;
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  box-shadow: var(--shadow-md);
}

.toast--success {
  background: #065f46;
  color: #ecfdf5;
}

.toast--warning {
  background: #92400e;
  color: #fffbeb;
}

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

.toast i {
  font-size: 1.125rem;
  flex-shrink: 0;
}

/* Dropdown */
.dropdown-menu {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  padding: 0.375rem;
}

.dropdown-item {
  border-radius: 6px;
  padding: 0.5rem 0.75rem;
  font-size: 0.9375rem;
  border: none;
  background: transparent;
  width: 100%;
  text-align: left;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text);
  cursor: pointer;
}

.dropdown-item:hover,
.dropdown-item:focus {
  background: var(--dropdown-item-hover-bg);
  color: var(--color-text);
}

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

@media (max-width: 768px) {
  .app-header__inner {
    padding: 1.25rem 1rem 1rem;
  }

  .toolbar__inner {
    padding: 0.75rem 1rem;
  }

  /* Compact library control: icon + dropdown caret (no long label) */
  .btn-library__summary {
    display: none;
  }

  .btn-library {
    max-width: none;
    width: auto;
    min-width: 56px;
    height: 44px;
    padding: 0 0.35rem 0 0.45rem !important;
    gap: 0.2rem;
    justify-content: center;
  }

  .search-bar .btn-library.dropdown-toggle::after {
    display: inline-block;
    flex-shrink: 0;
    margin-inline-start: 0.05rem;
    vertical-align: 0.12em;
  }

  .btn-library .fa-database {
    margin: 0;
  }

  .song-card {
    grid-template-columns: 56px 1fr auto;
    padding: 0.625rem 0.75rem;
    gap: 0.5rem;
  }

  .song-number {
    font-size: 0.75rem;
  }

  .song-name {
    font-size: 0.875rem;
  }

  .btn-add {
    width: 36px;
    height: 36px;
  }
}