/* ============================================================
   FULL PLAYER OVERLAY
   ============================================================ */
.full-overlay {
    position: fixed;
    inset: 0;
    z-index: 200;
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    opacity: 0;
    pointer-events: none;
    transform: translateY(30px) scale(0.96);
    transition: opacity 0.55s var(--smooth), transform 0.6s var(--spring);
    overflow: hidden;
}
.full-overlay.active {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0) scale(1);
}
.full-overlay .bg-glow {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background: radial-gradient(ellipse at 50% 20%, var(--glow-color), transparent 70%);
    transition: background 0.8s var(--smooth);
}
.full-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px 8px;
    position: relative;
    z-index: 1;
    flex-shrink: 0;
}
.full-header button {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.4rem;
    cursor: pointer;
    transition: transform 0.25s var(--spring), color 0.2s;
    padding: 8px;
}
.full-header button:active { transform: scale(0.85); }
.full-header .title {
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.9rem;
}
.full-body {
    flex: 1;
    position: relative;
    overflow: hidden;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0 24px 20px;
}
.player-view {
    width: 100%;
    max-width: 400px;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: opacity 0.4s var(--smooth), transform 0.4s var(--spring);
}
.player-view.hidden {
    opacity: 0;
    transform: scale(0.92);
    pointer-events: none;
    position: absolute;
}
.full-cover-wrap {
    position: relative;
    margin-bottom: 20px;
    cursor: pointer;
}
.full-cover-wrap:active { transform: scale(0.97); }
.full-cover {
    width: 200px;
    height: 200px;
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 60px var(--shadow-color), 0 0 0 1px rgba(255,255,255,0.05) inset;
    object-fit: cover;
    background: var(--card-border);
    display: block;
    position: relative;
    z-index: 1;
    transition: transform 0.4s var(--spring), box-shadow 0.4s;
    animation: discSpin 20s linear infinite;
    animation-play-state: paused;
    will-change: transform;
}
.full-cover.playing { animation-play-state: running; }
.full-cover:hover { transform: scale(1.02); animation-play-state: paused; }
.cover-glow-ring {
    position: absolute;
    inset: -12px;
    border-radius: calc(var(--radius-lg) + 12px);
    pointer-events: none;
    z-index: 0;
}
.cover-glow-ring.active { animation: ringPulseBig 2.4s ease-out infinite; }
@keyframes ringPulseBig {
    0% { box-shadow: 0 0 0 0 var(--glow-color); }
    100% { box-shadow: 0 0 0 40px transparent; }
}
.full-title {
    font-size: 1.4rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 2px;
    transition: color 0.3s;
}
.full-artist {
    color: var(--text-muted);
    text-align: center;
    margin-bottom: 16px;
    font-size: 0.9rem;
}
.full-actions {
    display: flex;
    gap: 10px;
    margin-bottom: 12px;
}
.full-actions button {
    background: transparent;
    border: 1px solid var(--card-border);
    padding: 6px 18px;
    border-radius: 100px;
    color: var(--text-secondary);
    font-size: 0.8rem;
    cursor: pointer;
    transition: transform 0.2s var(--spring), background 0.3s, border-color 0.3s, color 0.3s;
    display: flex;
    align-items: center;
    gap: 6px;
}
.full-actions button:active { transform: scale(0.93); }
.full-actions button:hover { background: var(--card-hover); }
.full-actions button.faved {
    color: var(--accent);
    border-color: var(--accent);
    background: rgba(253,121,168,0.08);
}
.full-actions button .fa-heart {
    transition: transform 0.4s var(--spring);
}
.full-actions button .fa-heart.bounce {
    animation: heartBounce 0.7s var(--spring);
}
@keyframes heartBounce {
    0% { transform: scale(1); }
    30% { transform: scale(1.8); }
    60% { transform: scale(0.85); }
    100% { transform: scale(1); }
}
.progress-area {
    width: 100%;
    max-width: 340px;
    margin: 4px 0 12px;
}
.progress-track {
    height: 4px;
    background: var(--card-border);
    border-radius: 2px;
    cursor: pointer;
    touch-action: none;
    position: relative;
    transition: height 0.2s;
}
.progress-track:hover { height: 6px; }
.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent), var(--primary));
    background-size: 300% 100%;
    border-radius: 2px;
    width: 0%;
    box-shadow: 0 0 12px var(--glow-color);
    transition: width 0.05s linear;
    animation: progressSheen 4s linear infinite;
    will-change: background-position;
}
.time-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 6px;
}
.play-controls {
    display: flex;
    align-items: center;
    gap: 28px;
    margin: 12px 0 8px;
}
.play-controls button {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.6rem;
    cursor: pointer;
    transition: transform 0.25s var(--spring), color 0.3s;
    padding: 4px;
}
.play-controls button:active { transform: scale(0.85); }
.play-controls .btn-play {
    background: var(--primary);
    width: 60px; height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.6rem;
    border: none;
    box-shadow: 0 8px 32px var(--glow-color);
    transition: transform 0.3s var(--spring), box-shadow 0.3s, background 0.3s;
}
.play-controls .btn-play:active {
    transform: scale(0.88);
    box-shadow: 0 4px 16px var(--glow-color);
}
.play-controls .btn-play .fa-icon {
    transition: transform 0.5s var(--spring);
}
.play-controls .btn-play.paused .fa-icon {
    transform: rotate(180deg);
}
.mode-toggle {
    background: transparent;
    border: 1px solid var(--card-border);
    width: 40px; height: 40px;
    border-radius: 50%;
    color: var(--text-muted);
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform 0.25s var(--spring), background 0.3s, border-color 0.3s, color 0.3s;
    margin-top: 4px;
}
.mode-toggle:active { transform: scale(0.88); }
.mode-toggle:hover { border-color: var(--primary); color: var(--primary-light); }
.mode-toggle .fa-icon {
    transition: transform 0.6s var(--spring);
}
.mode-toggle .fa-icon.spin {
    transform: rotate(360deg);
}

/* ============================================================
   LYRICS PANEL
   ============================================================ */
.lyrics-panel {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    padding: 20px 16px 30px;
    opacity: 0;
    transform: translateY(16px);
    pointer-events: none;
    transition: opacity 0.4s var(--smooth), transform 0.4s var(--spring);
    z-index: 3;
    background: var(--lyrics-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 0;
}
.lyrics-panel.active {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}
.lyrics-container {
    flex: 1;
    overflow-y: auto;
    text-align: center;
    padding: 8px 0;
    scroll-behavior: smooth;
}
.lyric-line {
    padding: 10px 16px;
    font-size: 0.9rem;
    color: var(--lyrics-text);
    border-radius: var(--radius-sm);
    transition: all 0.3s var(--smooth);
    cursor: pointer;
    position: relative;
    will-change: transform, background;
}
.lyric-line:active { transform: scale(0.97); }
.lyric-line.active {
    color: var(--text-primary);
    font-weight: 500;
    background: var(--glow-color);
    transform: scale(1.02);
}
.lyric-line .dot {
    display: none;
    position: absolute;
    left: 4px;
    top: 50%;
    transform: translateY(-50%) scale(0.6);
    width: 4px;
    height: 16px;
    background: var(--primary);
    border-radius: 2px;
    transition: transform 0.3s var(--spring);
}
.lyric-line.active .dot {
    display: block;
    transform: translateY(-50%) scale(1);
}
.lyrics-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    padding: 12px 0 4px;
    flex-shrink: 0;
}
.lyrics-actions button {
    background: transparent;
    border: 1px solid var(--card-border);
    padding: 8px 20px;
    border-radius: 100px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: transform 0.2s var(--spring), background 0.3s, border-color 0.3s;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 6px;
}
.lyrics-actions button:active { transform: scale(0.93); }
.lyrics-actions button:hover { background: var(--card-hover); border-color: var(--primary); }

/* ============================================================
   SETTINGS MODAL
   ============================================================ */
.settings-overlay {
    position: fixed;
    inset: 0;
    z-index: 250;
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: none;
    justify-content: center;
    align-items: flex-end;
    animation: overlayIn 0.3s var(--smooth);
}
.settings-overlay.active { display: flex; }
@keyframes overlayIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
.settings-panel {
    width: 100%;
    max-width: 480px;
    background: var(--card-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    padding: 24px 20px 36px;
    animation: slideUp 0.5s var(--spring) forwards;
    border-top: 1px solid var(--card-border);
}
.settings-panel.closing { animation: slideDown 0.4s var(--spring) forwards; }
@keyframes slideUp {
    from { transform: translateY(100%) scale(0.96); }
    to { transform: translateY(0) scale(1); }
}
@keyframes slideDown {
    from { transform: translateY(0) scale(1); }
    to { transform: translateY(100%) scale(0.96); }
}
.settings-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}
.settings-head h3 { font-weight: 500; font-size: 1.1rem; }
.settings-head button {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.3rem;
    cursor: pointer;
    transition: transform 0.25s var(--spring);
    padding: 4px;
}
.settings-head button:active { transform: scale(0.85); }
.setting-row {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 18px;
    color: var(--text-secondary);
}
.setting-row i { width: 20px; text-align: center; font-size: 1rem; }
.setting-row input[type="range"] {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    border-radius: 2px;
    background: var(--card-border);
    outline: none;
    transition: background 0.3s, height 0.2s;
}
.setting-row input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px; height: 16px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    box-shadow: 0 0 16px var(--glow-color);
    transition: transform 0.2s var(--spring), box-shadow 0.3s;
}
.setting-row input[type="range"]::-webkit-slider-thumb:active { transform: scale(1.2); }
.setting-row input[type="range"]::-moz-range-thumb {
    width: 16px; height: 16px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    border: none;
    box-shadow: 0 0 16px var(--glow-color);
}
.setting-row .val {
    min-width: 44px;
    text-align: right;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
    transition: color 0.3s;
}
.engine-switch {
    display: flex;
    background: var(--card-bg);
    border-radius: 100px;
    padding: 3px;
    border: 1px solid var(--card-border);
    position: relative;
    width: 100%;
    margin: 4px 0 12px;
}
.engine-switch .eng-indicator {
    position: absolute;
    top: 3px;
    bottom: 3px;
    width: calc(50% - 6px);
    background: var(--primary);
    border-radius: 100px;
    transition: left 0.5s var(--spring);
    box-shadow: 0 0 20px var(--glow-color);
    z-index: 0;
}
.engine-btn {
    flex: 1;
    padding: 8px 12px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    position: relative;
    z-index: 1;
    transition: color 0.3s;
    border-radius: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}
.engine-btn.active { color: #fff; }
.engine-btn i { font-size: 0.85rem; }

/* ============================================================
   TOAST
   ============================================================ */
.toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(20px) scale(0.9);
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    color: #fff;
    padding: 10px 24px;
    border-radius: 100px;
    z-index: 300;
    opacity: 0;
    transition: opacity 0.35s var(--smooth), transform 0.35s var(--spring);
    pointer-events: none;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 10px;
    white-space: nowrap;
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}
.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0) scale(1);
}
.toast i { color: var(--secondary); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 420px) {
    .full-cover { width: 160px; height: 160px; }
    .play-controls .btn-play { width: 50px; height: 50px; font-size: 1.3rem; }
    .brand h1 { font-size: 1.3rem; }
    .tab-item { font-size: 0.7rem; padding: 6px 2px; }
    .tab-item i { font-size: 0.75rem; }
    .full-title { font-size: 1.2rem; }
    .settings-panel { padding: 20px 16px 28px; }
}
@media (max-width: 360px) {
    .full-cover { width: 130px; height: 130px; }
    .full-title { font-size: 1rem; }
    .play-controls { gap: 16px; }
    .play-controls .btn-play { width: 44px; height: 44px; font-size: 1.1rem; }
}
@media (min-width: 600px) {
    .app { padding: 0 20px 20px; }
    .full-cover { width: 240px; height: 240px; }
}