/* === Font Import: Colus === */
@font-face {
  font-family: 'Colus';
  src: url('../fonts/Colus-Regular.ttf') format('truetype'),
       url('../fonts/Colus-Regular.otf') format('opentype');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

/* === Root Theme Variables === */
:root {
  --bg: #0f0f10;
  --bg-2: #151517;
  --elev: #1b1c1f;
  --overlay: rgba(0, 0, 0, .55);
  --surface: #111214;
  --line: #2a2b31;
  --text: #fafafa;
  --muted: #b6bcc6;
  --muted2: #9aa1ab;
  --accent: #1DB954;
  --accent-2: #7cffb5;
  --danger: #ff5c5c;
  --warn: #ffd166;
  --radius: 16px;
  --density: 1;
  --header-h: 72px;
}

/* === Base Reset === */
* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  background: linear-gradient(180deg, var(--bg), #0c0c0d 60%, #0a0a0b);
  color: var(--text);
  font: calc(15px * var(--density)) / 1.55 'Colus', ui-serif, Georgia, Times, 'Times New Roman', serif;
  letter-spacing: 0.3px;
}

/* === Header === */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: saturate(140%) blur(10px);
  background: rgba(10, 10, 12, .75);
  border-bottom: 1px solid var(--line);
  height: var(--header-h);
}

.wrap {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 16px;
  height: 100%;
}

.header .bar {
  display: flex;
  align-items: center;
  gap: 14px;
  height: 100%;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  letter-spacing: 0.5px;
  font-size: 18px;
  font-family: 'Colus', serif;
}

.brand .dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 18px color-mix(in srgb, var(--accent) 70%, transparent);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

.search {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 999px;
  background: var(--elev);
  border: 1px solid var(--line);
}

.search input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  color: var(--text);
  font-size: 15px;
  font-family: 'Colus', serif;
}

.kbd {
  font-size: 12px;
  color: var(--muted);
  border: 1px solid var(--line);
  padding: 2px 6px;
  border-radius: 6px;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  background: var(--elev);
  padding: 10px 14px;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 800;
  color: #eaeaea;
  transition: transform .06s ease, background .2s ease, box-shadow .2s ease;
  font-family: 'Colus', serif;
}

.btn:hover {
  background: color-mix(in srgb, var(--elev) 70%, #2a2a2a);
}

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

.btn.accent {
  background: var(--accent);
  color: #0b0c0d;
  border-color: transparent;
}

.btn.accent:hover {
  background: color-mix(in srgb, var(--accent) 85%, #73ffb1 15%);
}

.btn.danger {
  background: var(--danger);
  color: #fff;
  border-color: transparent;
}

.btn.danger:hover {
  background: #ff7272;
}

/* === Sidebar + Main Layout === */
.mainwrap {
  padding: 0;
}

.shell {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 16px;
  padding: 16px;
  min-height: calc(100vh - var(--header-h) - 90px);
}

@media (min-width: 1200px) {
  .shell { grid-template-columns: 420px 1fr; }
}
@media (max-width: 920px) {
  .shell { grid-template-columns: 1fr; gap: 10px; padding: 10px; }
}

/* === Sidebar === */
.sidebar {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 300px;
  max-height: calc(100vh - var(--header-h) - 110px);
}

.side-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
}

.side-title {
  font-weight: 900;
  font-family: 'Colus', serif;
}

/* === Tree View (Enhanced UX) === */
.tree {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 8px 12px 12px 12px;
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}

.tree::-webkit-scrollbar {
  width: 6px;
}
.tree::-webkit-scrollbar-thumb {
  background: var(--line);
  border-radius: 4px;
}

.folder, .file {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  margin: 2px 4px;
  border-radius: 10px;
  cursor: pointer;
  line-height: 1.3;
  transition: background 0.15s ease;
}

.folder:hover, .file:hover {
  background: #232429;
}

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

.file {
  cursor: default;
  font-weight: 500;
  background: rgba(255, 255, 255, 0.02);
}

.file-name, .folder-name {
  flex: 1;
  white-space: normal !important;
  word-break: break-word;
  overflow: visible;
  color: var(--text);
}

.file .meta {
  color: var(--muted2);
  font-size: 12px;
}

.file .play {
  margin-left: auto;
  border: 1px solid var(--line);
  padding: 6px 10px;
  border-radius: 999px;
  cursor: pointer;
  background: #202125;
  font-weight: 700;
  transition: background 0.2s, transform 0.1s;
}

.file .play:hover {
  background: var(--accent);
  color: #0b0c0d;
  transform: translateY(-1px);
}

.folder::before {
  content: "📁";
  opacity: 0.8;
  font-size: 15px;
}

.file::before {
  content: "🎵";
  opacity: 0.7;
  font-size: 14px;
}

/* Nested indentation */
.tree .folder > .node,
.tree .file {
  margin-left: 14px;
}

/* === Panel === */
.panel {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  min-height: 300px;
  overflow: hidden;
}

.panel .inner {
  padding: 14px;
}

.now {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px;
  background: var(--elev);
  border: 1px solid var(--line);
  border-radius: 12px;
  margin-bottom: 12px;
}

.title {
  font-weight: 900;
  font-size: 16px;
  font-family: 'Colus', serif;
}

.path {
  color: var(--muted);
  font-size: 13px;
}

/* === Controls === */
.controls-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin: 12px 0 14px;
}

/* === EQ === */
.eq-wrap { margin-top: 8px; }
.eq-header { display: flex; align-items: center; justify-content: space-between; }
#eq {
  display: block;
  width: 100%;
  height: 170px;
  border-radius: 12px;
  background: #0d0f12;
  border: 1px solid var(--line);
}
@media (max-width: 920px) { #eq { height: 130px; } }

/* === Player === */
.player {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 90;
  background: linear-gradient(180deg, rgba(0, 0, 0, .0), rgba(0, 0, 0, .4)), var(--surface);
  border-top: 1px solid var(--line);
}

.player .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  padding: 10px 14px;
}

.track-mini {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 190px;
}

.track-mini .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px color-mix(in srgb, var(--accent) 70%, transparent);
}

.track-mini .name {
  font-weight: 800;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 40vw;
}

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

.range {
  width: 160px;
}

@media (min-width: 1100px) {
  .range { width: 260px; }
}

.progress {
  flex: 1;
  display: flex;
  gap: 10px;
  align-items: center;
  min-width: 180px;
}

.bar {
  position: relative;
  height: 8px;
  flex: 1;
  background: #1a1d21;
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  overflow: hidden;
}

.fill {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

/* === Settings === */
.settings {
  position: fixed;
  right: 14px;
  top: calc(var(--header-h) + 10px);
  z-index: 95;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 16px;
  width: 320px;
  max-width: calc(100vw - 28px);
  padding: 12px;
  display: none;
  box-shadow: 0 18px 44px rgba(0, 0, 0, .45);
}

.settings.open { display: block; }

.settings h3 {
  margin: 6px 0 10px;
  font-size: 14px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .08em;
}

.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 0;
}

.row input[type="color"] {
  width: 44px;
  height: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
}

.row input[type="range"] { width: 160px; }

.row .mini {
  font-size: 12px;
  color: var(--muted2);
}