:root {
  --bg: #f7f7f8;
  --bg-elevated: #ffffff;
  --border-subtle: #e2e2e7;
  --text-main: #161616;
  --text-sub: #666a73;
  --accent: #111827;
  --accent-soft: #e5e7eb;
  --radius-lg: 18px;
  --radius-full: 999px;
  --shadow-soft: 0 14px 40px rgba(15, 23, 42, 0.08);
  --shadow-sm: 0 6px 16px rgba(15, 23, 42, 0.06);
  --transition-fast: 0.18s ease-out;
  --font-main: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
               "Segoe UI", sans-serif;
}

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

body {
  margin: 0;
  font-family: var(--font-main);
  background-color: var(--bg);
  color: var(--text-main);
}

/* Header */

.sl-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 16px 24px;
  background-color: var(--bg-elevated);
  border-bottom: 1px solid var(--border-subtle);
}

.sl-logo {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.sl-logo-main {
  font-weight: 600;
  letter-spacing: 0.16em;
  font-size: 14px;
}

.sl-logo-sub {
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--text-sub);
}

.sl-nav {
  display: flex;
  gap: 12px;
}

.nav-link {
  font-size: 14px;
  color: var(--text-sub);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: var(--radius-full);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.nav-link.active,
.nav-link:hover {
  background-color: var(--accent-soft);
  color: var(--text-main);
}

.sl-search-wrap {
  flex: 1;
  display: flex;
  justify-content: flex-end;
}

.sl-search-wrap input {
  width: 100%;
  max-width: 320px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  font-size: 14px;
  outline: none;
  background-color: #f9fafb;
}

.sl-search-wrap input:focus {
  border-color: #111827;
  background-color: #ffffff;
}

.sl-mobile-filter-toggle {
  display: none;
  border: none;
  background: #111827;
  color: #ffffff;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 13px;
}

/* Layout */

.sl-main {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 16px;
  padding: 16px 20px 84px;
  max-width: 1200px;
  margin: 0 auto;
}

/* Filters */

.sl-filters {
  background-color: var(--bg-elevated);
  border-radius: var(--radius-lg);
  padding: 16px 16px 18px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-subtle);
  align-self: flex-start;
}

.filters-section + .filters-section {
  margin-top: 16px;
}

.filters-section h3 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  margin: 0 0 8px;
  color: var(--text-sub);
}

.chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 5px 10px;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  background-color: #f3f4f6;
  color: var(--text-sub);
  font-size: 12px;
  margin: 3px 4px 3px 0;
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.chip:hover {
  background-color: #e5e7eb;
}

.chip-active {
  background-color: #111827;
  color: #ffffff;
  border-color: #111827;
}

/* Results */

.sl-results {
  min-height: 300px;
}

.tracks-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.loading {
  padding: 18px;
  font-size: 14px;
  color: var(--text-sub);
}

/* Track card */

.track-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 16px;
  padding: 12px 14px;
  border-radius: 18px;
  background-color: var(--bg-elevated);
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(148, 163, 184, 0.15);
  align-items: center;
}

.track-thumb-wrap {
  position: relative;
  width: 64px;
  height: 64px;
  border-radius: 18px;
  overflow: hidden;
  flex-shrink: 0;
}

.track-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.track-main {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.track-artist {
  font-size: 13px;
  color: var(--text-sub);
}

.track-title {
  font-size: 15px;
  font-weight: 600;
}

.track-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 11px;
  color: var(--text-sub);
}

.meta-pill {
  padding: 3px 7px;
  border-radius: 999px;
  background-color: #f3f4f6;
}

.track-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
}

.play-btn {
  border: none;
  border-radius: 999px;
  background-color: #111827;
  color: #ffffff;
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 14px;
}

.file-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  justify-content: flex-end;
}

.file-btn {
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background-color: #f9fafb;
  font-size: 11px;
  padding: 3px 8px;
  cursor: pointer;
  text-decoration: none;
  color: var(--text-sub);
}

/* Player */

.sl-player {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 16px;
  background-color: var(--bg-elevated);
  border-top: 1px solid var(--border-subtle);
}

.player-play-btn {
  border-radius: 999px;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-subtle);
  background-color: #111827;
  color: #ffffff;
  cursor: pointer;
  font-size: 14px;
}

.player-info {
  flex: 1;
  min-width: 0;
}

.player-title {
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.player-meta {
  font-size: 11px;
  color: var(--text-sub);
}

.player-progress {
  width: 160px;
}

#playerSeek {
  width: 100%;
}

.player-time {
  font-size: 11px;
  color: var(--text-sub);
}

/* Mobile */

@media (max-width: 860px) {
  .sl-main {
    grid-template-columns: 1fr;
    padding: 12px 12px 84px;
  }

  .sl-filters {
    position: fixed;
    top: 58px;
    left: 0;
    right: 0;
    max-height: calc(100vh - 58px - 70px);
    overflow-y: auto;
    transform: translateY(-110%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
    border-radius: 0 0 16px 16px;
    z-index: 25;
  }

  .sl-filters.filters-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .sl-mobile-filter-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .track-card {
    grid-template-columns: auto 1fr;
    grid-template-rows: auto auto;
  }

  .track-actions {
    grid-column: 1 / -1;
    flex-direction: row;
    justify-content: space-between;
    margin-top: 8px;
  }
}

@media (max-width: 520px) {
  .sl-header {
    flex-wrap: wrap;
  }

  .sl-search-wrap {
    order: 3;
    width: 100%;
  }
}