/*
 * AudioBoard Design System
 * Built on Bootstrap 5.3.7 — CSS custom properties layered on top.
 */

/* ===== Design Tokens ===== */
:root {
  /* Primary */
  --ab-primary: #6366f1;
  --ab-primary-hover: #4f46e5;
  --ab-primary-subtle: rgba(99,102,241,.08);

  /* Secondary */
  --ab-secondary: #334155;
  --ab-secondary-hover: #1e293b;

  /* Text */
  --ab-text: #1e293b;
  --ab-text-muted: #64748b;
  --ab-text-faint: #94a3b8;

  /* Backgrounds */
  --ab-bg: #f8f9fb;
  --ab-bg-surface: #ffffff;
  --ab-bg-sidebar: #0f1117;

  /* Borders */
  --ab-border: rgba(0,0,0,.08);
  --ab-border-strong: rgba(0,0,0,.15);

  /* Semantic */
  --ab-success: #16a34a;
  --ab-warning: #d97706;
  --ab-error: #dc2626;
  --ab-info: #0ea5e9;

  /* Stat card accents */
  --ab-accent-folders: #6366f1;
  --ab-accent-files: #334155;
  --ab-accent-boards: #0ea5e9;
  --ab-accent-plays: #10b981;

  /* Typography */
  --ab-text-base: 0.9375rem;
  --ab-text-sm: 0.8125rem;
  --ab-text-xs: 0.75rem;

  /* Spacing */
  --ab-space-1: 4px;
  --ab-space-2: 8px;
  --ab-space-3: 12px;
  --ab-space-4: 16px;
  --ab-space-5: 24px;
  --ab-space-6: 32px;
  --ab-space-8: 48px;

  /* Radii */
  --ab-radius-sm: 0.375rem;
  --ab-radius: 0.5rem;
  --ab-radius-lg: 0.75rem;
}

/* ===== Global ===== */
html, body {
  height: 100%;
}

body {
  display: flex;
  background: var(--ab-bg);
  color: var(--ab-text);
  font-size: var(--ab-text-base);
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  letter-spacing: -.01em;
  color: var(--ab-text);
}

.page-title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: var(--ab-space-3);
}

.section-label {
  font-size: var(--ab-text-xs);
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--ab-text-faint);
}

/* ===== Page Layout Primitives ===== */
.page-shell {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  width: 100%;
}

.page-header {
  margin-bottom: var(--ab-space-6);
}

.page-breadcrumbs {
  margin-bottom: var(--ab-space-1);
}

.page-breadcrumbs .breadcrumb {
  margin-bottom: 0;
  font-size: var(--ab-text-sm);
}

.page-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--ab-space-4);
  flex-wrap: wrap;
}

.page-title-group {
  display: flex;
  flex-direction: column;
}

.page-title-group h1 {
  margin-bottom: 0;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.page-section {
  margin-bottom: var(--ab-space-8);
}

.section-intro {
  margin-bottom: var(--ab-space-4);
}

.section-intro h2,
.section-intro h3 {
  font-weight: 700;
  margin-bottom: var(--ab-space-1);
}

.section-intro p {
  color: var(--ab-text-muted);
  font-size: var(--ab-text-sm);
  margin-bottom: 0;
}

.section-card {
  background: var(--ab-bg-surface);
  border-radius: var(--ab-radius-lg);
  border: 1px solid var(--ab-border);
  box-shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  overflow: hidden;
}

.section-card-header {
  padding: var(--ab-space-4) var(--ab-space-5);
  border-bottom: 1px solid var(--ab-border);
}

.section-card-body {
  padding: var(--ab-space-5);
}

.section-card-actions {
  padding: var(--ab-space-4) var(--ab-space-5);
  background: rgba(0,0,0,.02);
  border-top: 1px solid var(--ab-border);
  display: flex;
  align-items: center;
  gap: var(--ab-space-3);
}

.meta-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--ab-space-4);
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: var(--ab-text-sm);
  color: var(--ab-text-muted);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: var(--ab-space-2);
}

.content-stack {
  display: flex;
  flex-direction: column;
  gap: var(--ab-space-5);
}

/* ===== Collection Controls ===== */
.collection-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--ab-space-4);
  padding: var(--ab-space-4) var(--ab-space-5);
  background: var(--ab-bg-surface);
  border: 1px solid var(--ab-border);
  border-radius: var(--ab-radius-lg);
  box-shadow: 0 1px 2px rgba(0,0,0,.04);
}

.collection-controls-group {
  display: flex;
  align-items: center;
  gap: var(--ab-space-3);
}

/* ===== Spacing helpers ===== */
.stack-sm > * + * { margin-top: .5rem; }
.stack-md > * + * { margin-top: 1rem; }
.stack-lg > * + * { margin-top: 1.5rem; }

/* ===== Cards ===== */
.card {
  border-radius: var(--ab-radius-lg);
  transition: box-shadow 0.2s ease;
}

.card-elevated {
  border: none;
  box-shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
}

.card-elevated:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,.08), 0 2px 4px rgba(0,0,0,.04);
}

/* ===== Stat cards (dashboard) ===== */
.stat-card {
  border: none;
  border-radius: var(--ab-radius-lg);
  overflow: hidden;
  position: relative;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.stat-card--folders::before { background: var(--ab-accent-folders); }
.stat-card--files::before   { background: var(--ab-accent-files); }
.stat-card--boards::before  { background: var(--ab-accent-boards); }
.stat-card--plays::before   { background: var(--ab-accent-plays); }

.stat-card .stat-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--ab-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.stat-card--folders .stat-icon { background: rgba(99,102,241,.1);  color: var(--ab-accent-folders); }
.stat-card--files .stat-icon   { background: rgba(51,65,85,.1);    color: var(--ab-accent-files); }
.stat-card--boards .stat-icon  { background: rgba(14,165,233,.1);  color: var(--ab-accent-boards); }
.stat-card--plays .stat-icon   { background: rgba(16,185,129,.1);  color: var(--ab-accent-plays); }

/* ===== Feature cards (home page) ===== */
.feature-card {
  border: 1px solid var(--ab-border);
  border-radius: var(--ab-radius-lg);
  padding: 1.5rem;
  text-align: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  background: var(--ab-bg-surface);
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,.06);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--ab-radius-lg);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: .75rem;
}

.feature-icon--primary   { background: rgba(99,102,241,.1);  color: var(--ab-primary); }
.feature-icon--info      { background: rgba(14,165,233,.1);  color: var(--ab-info); }
.feature-icon--success   { background: rgba(16,185,129,.1);  color: var(--ab-accent-plays); }
.feature-icon--secondary { background: rgba(51,65,85,.1);    color: var(--ab-secondary); }

/* ===== Buttons ===== */
.btn {
  border-radius: var(--ab-radius);
  font-weight: 500;
}

.btn-primary {
  --bs-btn-bg: var(--ab-primary);
  --bs-btn-border-color: var(--ab-primary);
  --bs-btn-hover-bg: var(--ab-primary-hover);
  --bs-btn-hover-border-color: var(--ab-primary-hover);
  --bs-btn-active-bg: var(--ab-primary-hover);
  --bs-btn-active-border-color: var(--ab-primary-hover);
  --bs-btn-focus-shadow-rgb: 99,102,241;
}

.btn-dark-gray {
  background-color: #2b2b2b;
  border-color: #2b2b2b;
  color: #fff;
}

.btn-dark-gray:hover {
  background-color: #1a1a1a;
  border-color: #1a1a1a;
  color: #fff;
}

.btn-dark-gray:active, .btn-dark-gray:focus {
  background-color: #0d0d0d;
  border-color: #0d0d0d;
  color: #fff;
  box-shadow: 0 0 0 0.25rem rgba(43, 43, 43, 0.5);
}

/* Quick action buttons */
.quick-action-btn {
  border: 1px solid rgba(255,255,255,.15);
  border-radius: .625rem;
  padding: .875rem 1rem;
  transition: background-color 0.15s ease, border-color 0.15s ease;
  color: #fff;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: .75rem;
}

.quick-action-btn:hover {
  background-color: rgba(255,255,255,.08);
  border-color: rgba(255,255,255,.25);
  color: #fff;
}

/* ===== Forms ===== */
.form-control,
.form-select {
  border-radius: var(--ab-radius);
  border-color: var(--ab-border-strong);
}

.form-control:focus,
.form-select:focus {
  border-color: var(--ab-primary);
  box-shadow: 0 0 0 0.25rem var(--ab-primary-subtle);
}

.form-label {
  font-weight: 500;
  font-size: var(--ab-text-sm);
}

/* ===== Alerts ===== */
.alert {
  border-radius: var(--ab-radius);
}

/* ===== Tables & forms rounding ===== */
.table {
  border-radius: var(--ab-radius);
}

/* ===== Layout ===== */
main.container {
  flex: 1 0 auto;
}

.mr-md-300 {
  margin-right: 0;
}

/* Footer subtle background */
.bg-light-subtle {
  background-color: rgba(248, 249, 250, 0.7);
}

/* ===== Sort carets in table headers ===== */
.fs-table [data-table-sort-target="icon"] {
  font-size: 0.75em;
  line-height: 1;
  color: var(--ab-text-faint);
}

/* ===== Audio player (inline) ===== */
.file-item-line {
  display: flex;
  align-items: center;
  gap: .75rem;
  flex-wrap: wrap;
}

.file-item-name {
  flex: 0 1 auto;
}

.audio-player {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
}

.audio-player__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.8rem;
  height: 1.8rem;
  line-height: 1;
  border: 1px solid var(--ab-border-strong);
  background: var(--ab-bg-surface);
  border-radius: 999px;
  cursor: pointer;
  font-size: .9rem;
  padding: 0;
}

.audio-player__btn:hover {
  background: var(--ab-bg);
}

.audio-player__progress {
  appearance: none;
  -webkit-appearance: none;
  height: .35rem;
  background: var(--ab-border-strong);
  border-radius: 999px;
  outline: none;
  width: clamp(120px, 24vw, 260px);
  min-width: 0;
}

.audio-player.flex-column .audio-player__progress {
  display: block;
}

@media (max-width: 991.98px) {
  .audio-player:not(.flex-column) .audio-player__progress {
    display: none;
  }
}

/* Chrome/Safari slider styling */
.audio-player__progress::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: .8rem;
  height: .8rem;
  background: var(--ab-primary);
  border-radius: 50%;
  cursor: pointer;
  margin-top: -0.225rem;
}

/* Firefox slider styling */
.audio-player__progress::-moz-range-thumb {
  width: .8rem;
  height: .8rem;
  background: var(--ab-primary);
  border: none;
  border-radius: 50%;
  cursor: pointer;
}

.audio-player__progress::-moz-range-track {
  height: .35rem;
  background: var(--ab-border-strong);
  border-radius: 999px;
}

/* ===== Dropzone (simple) ===== */
.dz-box {
  border: 2px dashed var(--ab-border-strong);
  background: var(--ab-bg-surface);
  padding: 1rem;
  text-align: center;
  color: var(--ab-text-muted);
  border-radius: var(--ab-radius);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.dz-box.dz-over {
  border-color: var(--ab-primary);
  background: var(--ab-primary-subtle);
  color: var(--ab-primary);
}

.dz-box.dz-over .dz-overlay {
  opacity: 1;
}

.dz-quadratic-container {
  position: relative;
  width: 220px;
}

.dz-quadratic {
  width: 220px;
  height: 220px;
  position: relative;
}

.dz-preview {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: .4rem;
}

.dz-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(99,102,241, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 2rem;
  opacity: 0;
  transition: opacity 0.2s;
  border-radius: .4rem;
}

.dz-box:hover .dz-overlay {
  opacity: 1;
}

.dz-preview-container {
  position: relative;
  display: inline-block;
}

.dz-preview-container form,
.dz-preview-container a.btn-delete-image {
  position: absolute;
  top: 0;
  right: 0;
  transform: translate(50%, -50%);
  z-index: 10;
  line-height: 1;
}

.dz-preview-container .btn-delete-image {
  background: rgba(255, 255, 255, 0.8);
  border: none;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  color: var(--ab-error);
  font-size: 16px;
  cursor: pointer;
  box-shadow: 0 0 4px rgba(0,0,0,0.2);
}

.dz-preview-container .btn-delete-image:hover {
  background: #fff;
  color: var(--ab-error);
}

/* ===== Dropzone (drag & drop upload area) ===== */
.dropzone {
  border: 2px dashed rgba(99,102,241,.35);
  background: var(--ab-primary-subtle);
  border-radius: var(--ab-radius-lg);
  padding: 1rem;
}

.dropzone__inner {
  display: flex;
  align-items: center;
  gap: .75rem;
  color: var(--ab-secondary);
}

.dropzone i {
  font-size: 1.5rem;
  color: var(--ab-primary);
}

.dropzone__text {
  display: flex;
  flex-direction: column;
}

.dropzone--over {
  border-color: var(--ab-primary);
  background: rgba(99,102,241,.12) !important;
}

tr.dropzone--over {
  outline: 2px solid var(--ab-primary);
  outline-offset: -2px;
}

.dropzone__progress[data-tone="error"]   { color: var(--ab-error); }
.dropzone__progress[data-tone="warning"] { color: var(--ab-warning); }

/* ===== File item form row ===== */
.file-item-form-row {
  display: flex;
  flex-direction: column;
  gap: .75rem 1rem;
}

.file-item-form-row .form-group {
  min-width: 0;
}

.file-item-form-row .form-group--submit {
  align-self: flex-start;
}

@media (min-width: 992px) {
  .file-item-form-row {
    flex-direction: row;
    align-items: flex-end;
  }

  .file-item-form-row .form-group {
    flex: 1 1 auto;
  }

  .file-item-form-row .form-group--submit {
    flex: 0 0 auto;
    align-self: auto;
  }
}

/* ===== Filesystem browser ===== */
.fs-browser {
  width: 100%;
}

.fs-table {
  width: 100%;
  margin-bottom: 1rem;
  vertical-align: top;
  --bs-table-bg: transparent;
  --bs-table-border-color: var(--ab-border);
}

.fs-table > :not(caption) > * > * {
  background-color: transparent !important;
}

.fs-table.table-hover > tbody > tr:hover > * {
  background-color: var(--ab-primary-subtle) !important;
}

.fs-table thead th {
  color: var(--ab-secondary);
  font-weight: 600;
  font-size: var(--ab-text-sm);
  border-bottom-color: var(--ab-border);
}

.fs-table .fs-name {
  min-width: 0;
}

.fs-table .fs-name a {
  display: inline-block;
  max-width: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--ab-secondary);
}

.fs-table .fs-name .fs-name__label {
  display: flex;
  align-items: center;
  gap: .35rem;
  font-weight: 500;
  max-width: 100%;
}

.fs-table .fs-name .fs-name__icon {
  color: var(--ab-text-muted);
  opacity: .9;
  flex-shrink: 0;
}

@media (max-width: 767.98px) {
  .fs-table .fs-name {
    max-width: 60vw;
  }
}

@media (min-width: 768px) {
  .fs-table .fs-name a { max-width: 50vw; }
}

/* ===== Upload overlay ===== */
.upload-list::-webkit-scrollbar {
  width: 6px;
}

.upload-list::-webkit-scrollbar-track {
  background: var(--ab-bg);
}

.upload-list::-webkit-scrollbar-thumb {
  background: var(--ab-border-strong);
  border-radius: 3px;
}

.upload-item:last-child {
  border-bottom: none !important;
  margin-bottom: 0 !important;
  padding-bottom: 0 !important;
}

.transition-all {
  transition: all 0.3s ease-in-out;
}

/* ===== Folder player UI ===== */
.folder-player-ui {
  background-color: transparent;
  border: 1px solid var(--ab-border);
  box-shadow: 0 4px 12px rgba(0,0,0,.05);
  overflow: hidden;
}

.folder-player-ui .card-body {
  padding: 1.25rem;
}

.folder-player-ui__header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.folder-player-ui__controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.folder-player-ui__title-area {
  flex-grow: 1;
  min-width: 0;
}

.folder-player-ui__now-playing {
  font-size: var(--ab-text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ab-text-muted);
  font-weight: 600;
  margin-bottom: 0.1rem;
}

.folder-player-ui__title {
  font-weight: 600;
  color: var(--ab-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.folder-player-ui__list {
  max-height: 250px;
  overflow-y: auto;
  margin-top: 1.25rem;
  border-top: 1px solid rgba(0,0,0,.05);
  padding-top: 0.5rem;
  scrollbar-width: thin;
}

.folder-player-ui__list::-webkit-scrollbar {
  width: 6px;
}

.folder-player-ui__list::-webkit-scrollbar-thumb {
  background-color: rgba(0,0,0,.1);
  border-radius: 3px;
}

.folder-player-ui__item {
  display: flex;
  align-items: center;
  padding: 0.5rem 0.75rem;
  font-size: 0.9rem;
  color: var(--ab-text-muted);
  cursor: pointer;
  border-radius: var(--ab-radius-sm);
  margin-bottom: 1px;
  transition: background-color 0.15s ease;
}

.folder-player-ui__item:hover {
  background-color: var(--ab-primary-subtle);
  color: var(--ab-primary);
}

.folder-player-ui__item.active {
  background-color: var(--bs-secondary-bg, #e9ecef);
  color: var(--bs-secondary-color, #6c757d);
  font-weight: 500;
}

.folder-player-ui__item.disabled {
  color: var(--ab-text-faint);
  cursor: not-allowed;
  pointer-events: none;
}

.folder-player-ui__item-index {
  width: 1.5rem;
  font-size: 0.8rem;
  color: var(--ab-text-faint);
  margin-right: 0.5rem;
}

.folder-player-ui .btn-close {
  padding: 0.5rem;
  margin: -0.5rem -0.5rem -0.5rem auto;
}

.folder-player-indent {
  padding-left: 2rem;
  padding-right: 1rem;
  padding-bottom: 1rem;
}

@media (min-width: 768px) {
  .folder-player-indent {
    padding-left: 3rem;
    padding-right: 15%;
  }
}

/* Hide Trix attachment buttons */
.trix-button-group--file-tools {
  display: none !important;
}

/* ===== Callouts ===== */
.callout {
  padding: 1rem;
  margin-bottom: 1rem;
  border: 1px solid var(--ab-border-strong);
  border-left-width: .3rem;
  border-radius: var(--ab-radius-sm);
  background-color: var(--ab-bg-surface);
}

.callout-primary   { border-left-color: var(--ab-primary); }
.callout-secondary { border-left-color: var(--ab-text-muted); }
.callout-success   { border-left-color: var(--ab-success); }
.callout-info      { border-left-color: var(--ab-info); }
.callout-warning   { border-left-color: var(--ab-warning); }
.callout-danger    { border-left-color: var(--ab-error); }

/* ===== Audio inspector ===== */
.audio-inspector-viewport {
  height: 128px;
}

@media (min-width: 992px) {
  .audio-inspector-viewport {
    height: 256px;
  }
}

/* ===== Avatar circle ===== */
.avatar-circle {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--ab-text-muted);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.avatar-circle--lg {
  width: 96px;
  height: 96px;
  font-size: 2rem;
  background: var(--ab-bg);
}

.avatar-circle img,
.avatar-circle__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ===== Public profile ===== */
.pp-columns { display: block; gap: var(--ab-space-5); }
.pp-col { margin-bottom: var(--ab-space-5); }

@media (min-width: 900px) {
  .pp-columns { display: grid; grid-template-columns: 2fr 1fr 1fr; align-items: start; }
  .pp-col { margin-bottom: 0; }
}

.pp-list { list-style: none; padding: 0; margin: 0; }
.pp-list li { margin: var(--ab-space-2) 0; }
.pp-img { width: 100%; height: auto; display: block; border-radius: var(--ab-radius); }

/* ===== Back link ===== */
.back-link {
  text-decoration: none;
  color: var(--ab-text-muted);
  font-size: var(--ab-text-sm);
}

.back-link:hover {
  color: var(--ab-text);
}

.text-inherit {
  color: inherit;
  text-decoration: inherit;
}

.text-inherit:hover {
  color: inherit;
  opacity: 0.8;
}

.font-size-inherit {
  font-size: inherit;
}

.font-size-reduced {
  font-size: 0.6em;
}