:root {
    --bg: #121212;
    --bg-elevated: #181818;
    --bg-hover: #282828;
    --text: #ffffff;
    --text-muted: #b3b3b3;
    --accent: #1db954;
    --border: #2a2a2a;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}

a { color: inherit; }

#app {
    display: grid;
    grid-template-columns: 240px 1fr;
    grid-template-rows: 1fr auto;
    height: 100vh;
}

.sidebar {
    grid-row: 1 / 2;
    background: #000;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.logo { font-size: 22px; margin: 0 0 16px 8px; cursor: pointer; }

.sidebar-nav { display: flex; flex-direction: column; gap: 4px; margin-bottom: 20px; }

.nav-btn {
    text-align: left;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 14px;
    padding: 8px;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    display: block;
}
.nav-btn:hover, .nav-btn.active { color: var(--text); background: var(--bg-hover); }

.sidebar-section-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-muted);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0 8px;
    margin-bottom: 8px;
}
.sidebar-section-head button {
    background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 16px;
}

#playlist-list { list-style: none; margin: 0; padding: 0; flex: 1; overflow-y: auto; }
#playlist-list li {
    padding: 6px 8px;
    border-radius: 4px;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 14px;
    display: flex;
    justify-content: space-between;
}
#playlist-list li:hover { background: var(--bg-hover); color: var(--text); }
#playlist-list li.active { color: var(--accent); }
.playlist-delete {
    background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 13px; padding: 0 4px; opacity: 0; transition: opacity 0.15s;
}
#playlist-list li:hover .playlist-delete { opacity: 1; }
.playlist-delete:hover { color: #f15e6c; }

.sidebar-footer {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 12px;
    color: var(--text-muted);
    padding-top: 12px;
    border-top: 1px solid var(--border);
}
.sidebar-footer button {
    background: var(--bg-hover);
    border: none;
    color: var(--text);
    padding: 6px 8px;
    border-radius: 4px;
    cursor: pointer;
}
.username { color: var(--text); font-weight: 600; }

.main {
    grid-row: 1 / 2;
    overflow-y: auto;
    padding: 24px 32px 100px;
}

.topbar { display: flex; justify-content: flex-end; margin-bottom: 16px; }
#search {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 8px 14px;
    border-radius: 20px;
    width: 320px;
    max-width: 100%;
}

.view-title { font-size: 24px; font-weight: 700; margin-bottom: 16px; }

.artist-block { margin-bottom: 4px; }
.artist-name { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.artist-toggle {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
    cursor: pointer;
    padding: 8px;
    border-radius: 4px;
}
.artist-toggle:hover { background: var(--bg-hover); }
.artist-toggle::before {
    content: '▸';
    display: inline-block;
    margin-right: 8px;
    color: var(--text-muted);
    transition: transform 0.15s;
}
.artist-block.open > .artist-toggle::before { transform: rotate(90deg); }
.artist-count { font-size: 12px; font-weight: 400; color: var(--text-muted); white-space: nowrap; }
.artist-albums { padding-left: 8px; margin: 8px 0 20px; }
.album-block { margin-bottom: 4px; padding-left: 8px; }
.album-title { font-size: 15px; font-weight: 600; color: var(--text-muted); margin-bottom: 4px; }
.album-toggle {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 12px;
    cursor: pointer;
    padding: 6px 8px;
    border-radius: 4px;
    margin-bottom: 0;
}
.album-toggle:hover { background: var(--bg-hover); }
.album-toggle::before {
    content: '▸';
    display: inline-block;
    margin-right: 8px;
    transition: transform 0.15s;
}
.album-block.open > .album-toggle::before { transform: rotate(90deg); }
.album-count { font-size: 11px; font-weight: 400; color: var(--text-muted); white-space: nowrap; }
.album-tracks { padding-left: 8px; margin: 4px 0 12px; }

.track-row {
    display: grid;
    grid-template-columns: 32px 1fr auto auto;
    align-items: center;
    gap: 12px;
    padding: 6px 8px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
}
.track-row:hover { background: var(--bg-hover); }
.track-row.playing { color: var(--accent); }
.track-no { color: var(--text-muted); text-align: right; }
.track-title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.track-meta { color: var(--text-muted); font-size: 12px; }
.track-duration { color: var(--text-muted); font-variant-numeric: tabular-nums; }
.track-add {
    background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 16px; padding: 0 6px;
}
.track-add:hover { color: var(--accent); }

.empty-state { color: var(--text-muted); padding: 40px 0; text-align: center; }

.player-bar {
    grid-column: 1 / 3;
    grid-row: 2 / 3;
    background: var(--bg-elevated);
    border-top: 1px solid var(--border);
    display: grid;
    grid-template-columns: 240px 1fr 160px;
    align-items: center;
    padding: 10px 16px;
    gap: 16px;
}

.now-playing { min-width: 0; }
.now-title { font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.now-sub { font-size: 12px; color: var(--text-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.player-controls { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.transport { display: flex; gap: 16px; }
.transport button {
    background: none; border: none; color: var(--text); font-size: 18px; cursor: pointer;
}
#play-btn { font-size: 22px; }

.seek-row { display: flex; align-items: center; gap: 8px; width: 100%; max-width: 520px; }
.seek-row input[type=range] { flex: 1; }
#time-current, #time-total { font-size: 11px; color: var(--text-muted); font-variant-numeric: tabular-nums; }

.volume-row { display: flex; justify-content: flex-end; }
.volume-row input { width: 100px; }

/* Auth pages */
.auth-page, .upload-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--bg); color: var(--text); }
.upload-page { display: block; padding: 24px; }
.auth-form {
    background: var(--bg-elevated);
    padding: 32px;
    border-radius: 8px;
    width: 320px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.auth-form h1 { text-align: center; margin: 0 0 8px; }
.auth-form label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--text-muted); }
.auth-form input {
    background: #2a2a2a; border: 1px solid var(--border); color: var(--text); padding: 10px; border-radius: 4px; font-size: 14px;
}
.auth-form button {
    background: var(--accent); border: none; color: #000; font-weight: 700; padding: 10px; border-radius: 20px; cursor: pointer; margin-top: 8px;
}
.auth-alt { text-align: center; font-size: 13px; color: var(--text-muted); }
.error { color: #f15e6c; font-size: 13px; }
.success { color: var(--accent); font-size: 13px; }
.account-page { width: 100%; max-width: 320px; display: flex; flex-direction: column; gap: 12px; }
.account-page .auth-alt { text-align: left; }

.upload-header { max-width: 640px; margin: 0 auto 16px; }
.upload-main { max-width: 640px; margin: 0 auto; }
.upload-view { max-width: 640px; }
.upload-picker { margin: 20px 0; display: flex; gap: 12px; flex-wrap: wrap; }
.upload-main button, .upload-view button {
    background: var(--accent); border: none; color: #000; font-weight: 700; padding: 8px 16px; border-radius: 20px; cursor: pointer;
}
.upload-main button:disabled, .upload-view button:disabled { opacity: 0.5; cursor: default; }
.upload-clear-btn { background: var(--bg-hover); color: var(--text); }
.upload-start-btn { margin-bottom: 8px; }
.upload-summary { color: var(--text-muted); font-size: 13px; }
.upload-results { list-style: none; padding: 0; }
.upload-results li { padding: 8px; border-radius: 4px; margin-bottom: 4px; font-size: 14px; }
.upload-results li.ok { background: rgba(29,185,84,0.15); }
.upload-results li.fail { background: rgba(241,94,108,0.15); }
.upload-results li.skip { background: rgba(255,255,255,0.06); color: var(--text-muted); }

.user-list { list-style: none; padding: 0; margin: 20px 0 0; }
.user-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    padding: 12px;
    border-radius: 4px;
    background: var(--bg-elevated);
    margin-bottom: 8px;
}
.user-info { display: flex; align-items: center; gap: 8px; }
.badge {
    background: var(--bg-hover);
    color: var(--text-muted);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 2px 8px;
    border-radius: 10px;
}
.user-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.inline-form { display: flex; gap: 6px; align-items: center; }
.inline-form input {
    background: #2a2a2a; border: 1px solid var(--border); color: var(--text); padding: 6px 8px; border-radius: 4px; font-size: 13px; width: 140px;
}
.inline-form button {
    background: var(--bg-hover); border: none; color: var(--text); font-weight: 600; padding: 6px 12px; border-radius: 16px; cursor: pointer; font-size: 13px; white-space: nowrap;
}
.inline-form button.danger { background: rgba(241,94,108,0.15); color: #f15e6c; }
.inline-form button.danger:hover { background: rgba(241,94,108,0.3); }

@media (max-width: 720px) {
    #app { grid-template-columns: 1fr; }
    .sidebar { display: none; }
    .player-bar { grid-template-columns: 1fr; }
    .volume-row { display: none; }
}