/* ── Themes ── */
:root[data-theme="dark"] {
  --bg:            #0d0d10;
  --surface:       #16161c;
  --surface-hover: #1e1e28;
  --text:          #e2e2ea;
  --text-muted:    #9090a8;   /* 6:1 on surface — WCAG AA */
  --accent:        #7b68ee;
  --accent-dim:    #5548c8;
  --accent-glow:   rgba(123,104,238,0.15);
  --border:        #252530;
  --error:         #e05c5c;
  --success:       #5cb870;
  --range-track:   #35354a;   /* lifted so bar is visible at rest */
}
:root[data-theme="light"] {
  --bg:            #f5f5f7;
  --surface:       #ffffff;
  --surface-hover: #ededf5;
  --text:          #1a1a2e;
  --text-muted:    #656580;   /* 5.6:1 on white — WCAG AA */
  --accent:        #6c5ce7;
  --accent-dim:    #5048c0;
  --accent-glow:   rgba(108,92,231,0.12);
  --border:        #dedee8;
  --error:         #d63031;
  --success:       #00b894;
  --range-track:   #c0c0d0;
}
:root[data-theme="ocean"] {
  --bg:            #0a1628;
  --surface:       #0f2040;
  --surface-hover: #162a50;
  --text:          #c8e6f5;
  --text-muted:    #5d9ab8;   /* 5.3:1 on surface — WCAG AA */
  --accent:        #00cec9;
  --accent-dim:    #00a8a4;
  --accent-glow:   rgba(0,206,201,0.12);
  --border:        #1a3050;
  --error:         #ff7675;
  --success:       #55efc4;
  --range-track:   #2a4060;
}
:root[data-theme="sunset"] {
  --bg:            #1a0a10;
  --surface:       #26101a;
  --surface-hover: #321525;
  --text:          #f5e0d0;
  --text-muted:    #c09080;   /* 6.5:1 on surface — WCAG AA */
  --accent:        #fd7c6e;
  --accent-dim:    #e05a4e;
  --accent-glow:   rgba(253,124,110,0.12);
  --border:        #3a1820;
  --error:         #ff4757;
  --success:       #7bed9f;
  --range-track:   #4a2530;
}

:root {
  --space-1: 4px;  --space-2: 8px;  --space-3: 12px;
  --space-4: 16px; --space-5: 24px; --space-6: 32px;
  --radius: 8px;
  --player-h: 84px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }

/* Access-denied / sign-in-required notice shown on privileged pages. */
.access-denied {
  max-width: 28rem;
  margin: var(--space-7, 4rem) auto;
  padding: var(--space-6, 2rem);
  text-align: center;
  display: grid;
  gap: var(--space-4);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.access-denied h1 { margin: 0; font-size: 1.4rem; }
.access-denied p { margin: 0; color: var(--text-muted); }
.access-denied .btn { justify-self: center; text-decoration: none; }

body {
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding-bottom: calc(var(--player-h) + var(--space-4));
}

/* ── Header ── */
header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.logo {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
}
.logo span { color: var(--accent); }   /* accent on "Mad" — the differentiator */

/* ── Site nav (shared between upload and library pages) ── */
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
  /* Push everything after the nav to the right so the logo + nav stay grouped
     on the left on every page. On the library page the search bar's flex-grow
     consumes the free space first, so this auto margin resolves to ~0 there;
     on pages without a search bar (upload, admin) it keeps the nav from
     drifting to the center under justify-content: space-between. */
  margin-right: auto;
}

.nav-link {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  padding: 4px 8px;
  border-bottom: 2px solid transparent;
  transition: color 150ms ease, border-color 150ms ease;
  line-height: 1;
  margin-bottom: -1px; /* align underline with header bottom border */
}
.nav-link:hover { color: var(--text); }
.nav-link--active {
  color: var(--text);
  border-bottom-color: var(--accent);
}
.nav-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}

/* ── Header search ── */
.header__search {
  position: relative;
  flex: 1;
  min-width: 120px;
  max-width: 400px;
  margin: 0 16px;
}

.header__search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.header__search-input {
  width: 100%;
  height: 36px;
  padding: 0 36px 0 36px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  transition: border-color 150ms ease, box-shadow 150ms ease;
}
.header__search-input::placeholder { color: var(--text-muted); }
.header__search-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
/* Hide the browser's native clear button — we render our own */
.header__search-input::-webkit-search-cancel-button { display: none; }

.header__search-clear {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  padding: 2px 4px;
  border-radius: 50%;
  transition: color 120ms ease, background 120ms ease;
}
.header__search-clear:hover { color: var(--text); background: var(--surface-hover); }
.header__search-clear:focus-visible { outline: 2px solid var(--accent); }

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.theme-switcher {
  display: flex;
  gap: 3px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 3px;
}

.theme-dot {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 120ms ease, border-color 120ms ease;
}
.theme-dot:hover { transform: scale(1.15); }
.theme-dot[data-theme="dark"]   { background: linear-gradient(135deg, #0d0d10 50%, #7b68ee 50%); }
.theme-dot[data-theme="light"]  { background: linear-gradient(135deg, #f5f5f7 50%, #6c5ce7 50%); }
.theme-dot[data-theme="ocean"]  { background: linear-gradient(135deg, #0a1628 50%, #00cec9 50%); }
.theme-dot[data-theme="sunset"] { background: linear-gradient(135deg, #1a0a10 50%, #fd7c6e 50%); }
.theme-dot.active { border-color: var(--accent); }
.theme-dot:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ── Library ── */
main { padding: var(--space-5); max-width: 860px; margin: 0 auto; }

.section-title {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: var(--space-4);
}

.track-list { list-style: none; }

.track-row {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 120ms ease;
}
.track-row:hover  { background: var(--surface-hover); }
.track-row:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
.track-row.playing { background: var(--surface-hover); }
.track-row.playing .track-title { color: var(--accent); }

.track-num {
  flex-shrink: 0;
  width: 22px;
  text-align: right;
  font-size: 13px;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}
.track-row.playing .track-num { display: none; }
.track-icon-playing {
  display: none;
  flex-shrink: 0;
  width: 22px;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}
.track-row.playing .track-icon-playing { display: flex; }

.track-info { flex: 1; min-width: 0; }
.track-title {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-weight: 500;
}
.track-meta {
  font-size: 13px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.track-dur {
  flex-shrink: 0;
  width: 40px;
  text-align: right;
  font-size: 12px;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.track-row.playing .track-dur { color: var(--accent); }

.empty-state {
  text-align: center;
  padding: 48px var(--space-5);
  color: var(--text-muted);
}
.empty-state p { margin-top: var(--space-2); font-size: 14px; }
.btn-upload-empty {
  margin-top: var(--space-4);
  padding: var(--space-2) var(--space-5);
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 150ms ease;
}
.btn-upload-empty:hover { background: var(--accent-dim); }
.btn-upload-empty:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* ── Player bar ── */
#player-bar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  z-index: 10;
  display: flex;
  flex-direction: column;
}
#player-bar.hidden { display: none; }

/* Progress bar */
.progress-wrap {
  position: relative;
  width: 100%;
  height: 4px;
  background: var(--range-track);
  cursor: pointer;
  transition: height 100ms ease;
}
.progress-wrap:hover { height: 6px; }
.progress-fill {
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 0%;
  background: var(--accent);
  pointer-events: none;
}

/* Three-column grid: track info | controls | time+volume */
.player-main {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-2) var(--space-5);
  height: 80px;
}

.player-track { min-width: 0; }
.player-title {
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.player-artist {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.player-controls {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.ctrl-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 50%;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 120ms ease, background 120ms ease;
  padding: 0;
  flex-shrink: 0;
}
.ctrl-btn:hover  { color: var(--text); background: var(--surface-hover); }
.ctrl-btn.active { color: var(--accent); }
.ctrl-btn:focus-visible { outline: 2px solid var(--accent); }

.ctrl-btn.primary {
  background: var(--accent);
  color: #fff;
  width: 42px;
  height: 42px;
}
.ctrl-btn.primary:hover { background: var(--accent-dim); color: #fff; }

.player-right {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
}

.player-time {
  font-size: 11px;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.player-volume {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-muted);
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  border-radius: 2px;
  background: var(--range-track);
  cursor: pointer;
  outline: none;
}
input[type="range"]:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--accent);
}
input[type="range"]::-moz-range-thumb {
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
}

#volume-slider { width: 76px; }

/* ── Upload modal ── */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.65);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal-backdrop.hidden { display: none; }

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: var(--space-5);
  width: min(420px, calc(100vw - 2 * var(--space-5)));
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-5);
}
.modal-header h2 { font-size: 16px; font-weight: 600; }

.btn-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  padding: var(--space-1);
  border-radius: 4px;
}
.btn-close:hover { color: var(--text); background: var(--surface-hover); }
.btn-close:focus-visible { outline: 2px solid var(--accent); }

.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 40px var(--space-5);
  text-align: center;
  color: var(--text-muted);
  cursor: pointer;
  transition: border-color 150ms ease, background 150ms ease;
  position: relative;
}
.drop-zone.dragover {
  border-color: var(--accent);
  background: var(--accent-glow);
  color: var(--text);
}
.drop-zone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}
.drop-zone .drop-icon { font-size: 40px; margin-bottom: var(--space-3); }
.drop-zone p { font-size: 14px; pointer-events: none; color: var(--text); }
.drop-zone small { font-size: 12px; color: var(--text-muted); pointer-events: none; }

.upload-status {
  margin-top: var(--space-4);
  font-size: 13px;
  min-height: 20px;
}
.upload-status.error   { color: var(--error); }
.upload-status.success { color: var(--success); }

/* ── Library drill-down ── */
.library-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--border);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  min-width: 0;
}

.bc-item {
  font-size: 13px;
  white-space: nowrap;
}
.bc-link {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0;
  font-size: 13px;
  font-weight: 500;
  transition: color 100ms ease;
}
.bc-link:hover { color: var(--text); }
.bc-link:focus-visible { outline: 2px solid var(--accent); border-radius: 3px; }
.bc-current {
  color: var(--text);
  font-weight: 600;
}
.bc-sep {
  color: var(--text-muted);
  font-size: 13px;
  opacity: 0.5;
}

/* ── View panels (SPA) ── */
.view-panel--hidden { display: none; }
.view-panel--active { display: block; }

.library-panel { min-height: 120px; }

@keyframes panelFadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}
.panel-fade-in {
  animation: panelFadeIn 150ms ease-out both;
}

.panel-empty {
  padding: 40px var(--space-5);
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
}
.panel-empty a {
  color: var(--accent);
  text-decoration: none;
}
.panel-empty a:hover { text-decoration: underline; }

/* Artist and album rows share base */
.panel-row {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 120ms ease;
}
.panel-row:hover { background: var(--surface-hover); }
.panel-row:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }

.row-name {
  font-size: 15px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.row-meta {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.row-chevron {
  margin-left: auto;
  flex-shrink: 0;
  color: var(--text-muted);
  font-size: 18px;
  opacity: 0.5;
}
.panel-row:hover .row-chevron { opacity: 1; }

/* Artist row: name fills space, meta right-aligned before chevron */
.artist-row { gap: var(--space-3); }
.artist-row .row-name { flex: 1; min-width: 0; }
.artist-row .row-meta { flex-shrink: 0; }

/* Album row: art + text block */
.album-row { gap: var(--space-4); }
.row-art {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 6px;
  background: var(--surface-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  overflow: hidden;
}
.row-art img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: inherit;
}
.row-body { flex: 1; min-width: 0; }

.track-row.unavailable { opacity: 0.4; }
.track-row.unavailable .track-title { color: var(--text-muted); }
.track-row.unavailable .track-title::after {
  content: ' — not found';
  font-style: italic;
  font-weight: 400;
}

/* ── Search results ── */
#view-search { padding: 24px 32px; }

.search-section + .search-section { margin-top: 32px; }

.search-section__header {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 0 0 8px 0;
}

.search-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 120ms ease;
}
.search-row:hover { background: var(--surface-hover); }
.search-row:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }

/* Artist avatar — 32px circle with first letter */
.search-row__avatar {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 13px;
}

/* Album thumbnail — 40px square */
.search-row__thumb {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 4px;
  background: var(--surface-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  overflow: hidden;
}
.search-row__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.search-row__body { flex: 1; min-width: 0; }

.search-row__title {
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.search-row__subtitle {
  font-size: 13px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.search-row__duration {
  flex-shrink: 0;
  font-size: 13px;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

/* Search empty state */
.search-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  gap: 8px;
  text-align: center;
}
.search-empty-state__query {
  font-size: 15px;
  color: var(--text);
}
.search-empty-state__hint {
  font-size: 13px;
  color: var(--text-muted);
}

/* Search loading shimmer bar */
.search-loading-bar {
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  background-size: 200% 100%;
  animation: search-shimmer 1.2s infinite;
  border-radius: 1px;
  margin-bottom: 16px;
}
@keyframes search-shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ── Button system ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  border: 1px solid transparent;
  background: none;
  color: var(--text);
  transition: background 150ms ease, border-color 150ms ease, color 150ms ease;
}
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.btn:disabled { opacity: 0.6; cursor: default; }
.btn-neutral {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
}
.btn-neutral:hover:not(:disabled) { background: var(--surface-hover); }

/* ── Header auth area ── */
.user-area {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-right: var(--space-2);
}
.user-name {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ── Auth modals ── */
.modal-body { font-size: 14px; color: var(--text); margin-bottom: var(--space-5); }
.modal-actions { display: flex; justify-content: flex-end; gap: var(--space-3); margin-top: var(--space-3); }
.login-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.login-form label {
  font-size: 0.85rem;
  color: var(--text-muted);
}
.login-form input {
  padding: var(--space-2) var(--space-3);
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font: inherit;
}
.login-form input:focus-visible {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
}
.login-error {
  color: var(--error);
  font-size: 0.9rem;
  margin: var(--space-1) 0 0;
}

/* ── Toasts ── */
.toast-stack {
  position: fixed;
  bottom: var(--space-5);
  right: var(--space-5);
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-width: min(360px, calc(100vw - 2 * var(--space-5)));
  pointer-events: none;
}
#toastAlert { bottom: auto; top: var(--space-5); }
.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: var(--space-3);
  font-size: 13px;
  color: var(--text);
  pointer-events: auto;
  box-shadow: 0 4px 16px rgba(0,0,0,0.25);
}
.toast.is-success { border-left-color: var(--success); }
.toast.is-error   { border-left-color: #e05c5c; }
.toast-icon { flex-shrink: 0; }
.toast.is-success .toast-icon { color: var(--success); }
.toast.is-error .toast-icon   { color: #e05c5c; }
.toast-msg { flex: 1; min-width: 0; }
.toast-close {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 15px;
  line-height: 1;
  padding: 0 2px;
  flex-shrink: 0;
}
.toast-close:hover { color: var(--text); }
.toast-close:focus-visible { outline: 2px solid var(--accent); }

/* ── Narrow viewport: search drops to second row ── */
@media (max-width: 599px) {
  header { flex-wrap: wrap; }
  .header__search {
    width: 100%;
    max-width: none;
    margin: var(--space-2) 0 0 0;
    order: 10;
  }
}