:root {
    --background: #000000;
    --card-background: rgba(255, 255, 255, 0.08);
    --card-background-hover: rgba(255, 255, 255, 0.12);
    --accent: #fa233b;
    --accent-secondary: #fa5a4e;
    --accent-light: rgba(250, 35, 59, 0.15);
    --accent-ultra-light: rgba(250, 35, 59, 0.05);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);
    --border: rgba(255, 255, 255, 0.12);
    --border-subtle: rgba(255, 255, 255, 0.06);
    --danger: #ff3b30;
    --success: #34c759;
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    --shadow-large: 0 20px 60px rgba(0, 0, 0, 0.6);
    --shadow-subtle: 0 4px 12px rgba(0, 0, 0, 0.2);
    --panel-radius: 20px;
    --dynamic-bg-start: #1c1c2e;
    --dynamic-bg-end: #121220;
    --dynamic-bg-highlight: rgba(255, 255, 255, 0.12);
    --max-layout-width: 1180px;
    --glass-border-strong: rgba(255, 255, 255, 0.18);
    --glass-background: rgba(16, 16, 28, 0.45);
    --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

@media (min-width: 1400px) {
    :root {
        --max-layout-width: 1280px;
    }
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', 'Roboto', sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    height: 100%;
    transition: background 1s cubic-bezier(0.4, 0, 0.2, 1);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    display: flex;
    justify-content: center;
    align-items: stretch;
    padding: clamp(1.5rem, 2.5vw, 2.75rem);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
    overflow-y: auto;
}

.dynamic-backdrop {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background:
        radial-gradient(130% 130% at 18% 12%, var(--dynamic-bg-highlight), transparent 68%),
        radial-gradient(115% 115% at 82% 20%, rgba(255, 255, 255, 0.18), transparent 65%),
        conic-gradient(from 180deg at 50% 50%, rgba(255, 255, 255, 0.12), transparent 45%),
        linear-gradient(135deg, var(--dynamic-bg-start) 0%, var(--dynamic-bg-end) 100%);
    filter: saturate(160%) brightness(1.05);
    transition: background 1.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.6s ease;
    will-change: background, opacity;
}

.dynamic-backdrop::before {
    content: "";
    position: absolute;
    inset: -20%;
    background: radial-gradient(60% 60% at 30% 25%, rgba(255, 255, 255, 0.22), transparent 70%);
    filter: blur(120px) saturate(140%);
    opacity: 0.65;
    transition: opacity 0.8s ease;
    mix-blend-mode: screen;
}

.dynamic-backdrop__layer {
    position: absolute;
    inset: 0;
    background: inherit;
    opacity: 0;
    transition: opacity 1.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.dynamic-backdrop__layer.is-active {
    opacity: 1;
}

.dynamic-backdrop::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.55) 0%, rgba(0, 0, 0, 0.25) 55%, rgba(0, 0, 0, 0.65) 100%);
    mix-blend-mode: multiply;
}

@media (prefers-reduced-motion: reduce) {
    .dynamic-backdrop {
        transition: none;
    }
    .lyrics-container {
        scroll-behavior: auto;
    }
}

.app {
    width: min(var(--max-layout-width), 100%);
    display: flex;
    flex-direction: column;
    gap: clamp(1.75rem, 2.5vw, 2.75rem);
    position: relative;
    z-index: 1;
    margin: 0 auto;
    padding: clamp(1.75rem, 3vw, 2.75rem);
    border-radius: 36px;
    background: var(--glass-background);
    backdrop-filter: blur(42px) saturate(180%);
    -webkit-backdrop-filter: blur(42px) saturate(180%);
    border: 1px solid var(--border);
    box-shadow: 0 32px 90px rgba(0, 0, 0, 0.45);
    isolation: isolate;
    overflow: hidden;
}

.app::before {
    content: "";
    position: absolute;
    inset: 1px;
    border-radius: inherit;
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.08), transparent 55%);
    opacity: 0.65;
    pointer-events: none;
}

.app::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    border: 1px solid rgba(255, 255, 255, 0.05);
    pointer-events: none;
}

.app > * {
    position: relative;
    z-index: 1;
}

.app-header {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
}

.app-title {
    margin: 0;
    font-weight: 800;
    font-size: clamp(2rem, 4.5vw, 3rem);
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, #ffffff 0%, rgba(255, 255, 255, 0.85) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 2px 20px rgba(255, 255, 255, 0.15);
}

.app-subtitle {
    margin: 0 0 0.75rem 0;
    color: var(--text-secondary);
    font-size: clamp(0.875rem, 1.5vw, 1rem);
    font-weight: 500;
    letter-spacing: -0.01em;
}

.search-form {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    justify-content: center;
    margin: 0 auto;
    padding: 0.5rem 0.5rem 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 999px;
    border: 1px solid var(--border-subtle);
    backdrop-filter: blur(24px) saturate(140%);
    -webkit-backdrop-filter: blur(24px) saturate(140%);
    max-width: min(560px, 92%);
    box-shadow: var(--shadow-subtle);
    transition: var(--transition-smooth);
}

.search-form:focus-within {
    border-color: rgba(255, 255, 255, 0.32);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.12);
}

.search-input {
    flex: 1;
    min-width: 200px;
    border: none;
    background: transparent;
    padding: 0.35rem 0;
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.01em;
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-input:focus {
    outline: none;
    box-shadow: none;
}

.search-button {
    background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
    border: none;
    border-radius: 999px;
    padding: 0.7rem 1.6rem;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition-fast);
    box-shadow: 0 10px 24px rgba(250, 35, 59, 0.35);
}

.search-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 28px rgba(250, 35, 59, 0.4);
}

.search-button:active {
    transform: translateY(0);
}

.search-feedback {
    padding: 0.75rem 1rem;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.08);
    text-align: center;
    font-size: 0.95rem;
    transition: opacity 0.3s ease;
    border: 1px solid transparent;
}

.search-feedback.info {
    border-color: rgba(124, 92, 255, 0.35);
    color: var(--accent);
}

.search-feedback.success {
    border-color: rgba(76, 217, 100, 0.35);
    color: var(--success);
}

.search-feedback.error {
    border-color: rgba(255, 107, 129, 0.35);
    color: var(--danger);
}

.hidden {
    display: none !important;
}

.content {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: clamp(1.5rem, 3vw, 2.5rem);
    align-items: start;
    width: 100%;
}

.player-panel,
.lyrics-panel {
    background: linear-gradient(160deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0.03) 55%, rgba(12, 12, 20, 0.65) 100%);
    border-radius: var(--panel-radius);
    backdrop-filter: blur(50px) saturate(200%);
    -webkit-backdrop-filter: blur(50px) saturate(200%);
    padding: 2.25rem;
    border: 1px solid var(--glass-border-strong);
    box-shadow: 0 26px 60px rgba(0, 0, 0, 0.45);
    min-height: clamp(420px, 52vh, 560px);
    transition: var(--transition-smooth);
    overflow: hidden;
    position: relative;
    width: 100%;
    max-width: 100%;
    min-width: 0;
}

.player-panel:hover,
.lyrics-panel:hover {
    background: linear-gradient(160deg, rgba(255, 255, 255, 0.12) 0%, rgba(255, 255, 255, 0.06) 40%, rgba(12, 12, 20, 0.7) 100%);
    border-color: rgba(255, 255, 255, 0.25);
}

.now-playing-card {
    display: grid;
    grid-template-columns: minmax(0, clamp(160px, 24vw, 240px)) minmax(0, 1fr);
    gap: clamp(1.5rem, 3vw, 2rem);
    align-items: center;
    width: 100%;
}

.artwork-wrapper {
    position: relative;
    width: clamp(160px, 24vw, 240px);
    aspect-ratio: 1 / 1;
}

.cover-art {
    width: 100%;
    height: 100%;
    border-radius: 20px;
    object-fit: cover;
    box-shadow: 0 24px 45px rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.12);
    transition: transform 0.45s cubic-bezier(0.21, 0.72, 0.28, 0.99), box-shadow 0.45s cubic-bezier(0.21, 0.72, 0.28, 0.99);
    transform-origin: center;
}

.cover-art:hover {
    transform: scale(1.035);
    box-shadow: 0 28px 55px rgba(0, 0, 0, 0.5);
}

.cover-art.placeholder {
    background: linear-gradient(135deg, var(--accent-ultra-light), rgba(255, 255, 255, 0.04));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-weight: 500;
}

.artwork-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9375rem;
}

.track-meta {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 0.75rem;
    flex: 1;
    min-width: 0;
    overflow: hidden;
}

.track-title {
    margin: 0;
    font-size: clamp(2rem, 3.2vw, 2.6rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.15;
    text-shadow: 0 2px 24px rgba(0, 0, 0, 0.4);
    overflow: hidden;
    text-overflow: ellipsis;
    word-wrap: break-word;
}

.track-artist {
    margin: 0.25rem 0 0 0;
    color: var(--text-secondary);
    font-size: 1.15rem;
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    word-wrap: break-word;
}

.track-album {
    margin: 0;
    color: var(--text-muted);
    font-size: 1rem;
    overflow: hidden;
    text-overflow: ellipsis;
    word-wrap: break-word;
}

.track-details,
.track-extra {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
}

.track-details span:not(:last-child)::after,
.track-extra span:not(:last-child)::after {
    content: "•";
    margin-left: 1rem;
    color: rgba(255, 255, 255, 0.3);
}

.audio-controls {
    margin-top: 2rem;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    padding: 1.75rem;
    border-radius: 18px;
    border: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    width: 100%;
    box-sizing: border-box;
}

.controls-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.controls-row.primary-controls {
    justify-content: space-between;
    gap: 1.5rem;
}

.transport-buttons {
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

.control-button {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(145deg, var(--accent), var(--accent-secondary));
    color: var(--text-primary);
    font-size: 1.65rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.35s cubic-bezier(0.21, 0.72, 0.28, 0.99), box-shadow 0.35s cubic-bezier(0.21, 0.72, 0.28, 0.99);
    box-shadow: 0 18px 30px rgba(250, 35, 59, 0.35);
}

.control-button:disabled {
    opacity: 0.35;
    cursor: not-allowed;
    box-shadow: none;
}

.control-button.secondary {
    width: 58px;
    height: 58px;
    background: rgba(255, 255, 255, 0.12);
    color: var(--text-primary);
    box-shadow: none;
    border: 1px solid rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: var(--transition-smooth);
}

.control-button.secondary.utility {
    width: 52px;
    height: 52px;
    font-size: 1.3rem;
    border-radius: 20px;
    border-color: rgba(255, 255, 255, 0.18);
    background: rgba(255, 255, 255, 0.14);
}

.control-button.secondary.utility:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.22);
}

.control-button.secondary.utility .icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

.control-button.secondary.utility .control-icon {
    width: 22px;
    height: 22px;
    fill: currentColor;
}

.control-button.secondary.utility.is-loading::after {
    width: 20px;
    height: 20px;
    border-width: 2px;
}

.control-button.secondary:hover:not(:disabled) {
    transform: translateY(-2px) scale(1.04);
    background: rgba(255, 255, 255, 0.18);
    box-shadow: 0 14px 28px rgba(0, 0, 0, 0.35);
}

.control-button.secondary:active:not(:disabled) {
    transform: scale(0.94);
}

.control-button:not(.secondary):hover:not(:disabled) {
    transform: translateY(-3px) scale(1.06);
    box-shadow: 0 24px 40px rgba(250, 35, 59, 0.45);
}

.control-button:not(.secondary):active:not(:disabled) {
    transform: scale(0.96);
}

.control-button .icon {
    transition: opacity 0.25s ease;
}

.control-button.is-loading {
    position: relative;
    pointer-events: none;
}

.control-button.is-loading .icon {
    opacity: 0;
}

.control-button.is-loading::after {
    content: "";
    position: absolute;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 3px solid rgba(255, 255, 255, 0.35);
    border-top-color: #ffffff;
    animation: spin 0.9s linear infinite;
}

.progress-wrapper {
    flex: 1 1 220px;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 220px;
}

.time-display {
    font-variant-numeric: tabular-nums;
    color: var(--text-secondary);
    min-width: 44px;
    text-align: center;
    font-size: 0.9rem;
    font-weight: 600;
}

.progress-bar {
    flex: 1;
    appearance: none;
    height: 6px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.18);
    overflow: hidden;
    cursor: pointer;
    transition: height 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress-bar:hover {
    height: 7px;
}

.progress-bar::-webkit-slider-thumb {
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: white;
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.2), 0 3px 10px rgba(0, 0, 0, 0.4);
    cursor: pointer;
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress-bar::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.progress-bar::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: white;
    border: none;
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.2), 0 3px 10px rgba(0, 0, 0, 0.4);
    cursor: pointer;
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.progress-bar::-moz-range-thumb:hover {
    transform: scale(1.2);
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.controls-row.playlist-row {
    align-items: stretch;
}

.playlist-card {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: 100%;
    padding: 1.25rem 1.5rem;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.25);
    transition: var(--transition-smooth);
}

.playlist-card__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.playlist-card__actions {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    min-height: 44px;
    min-width: 0;
}

.playlist-action-button {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-fast);
    backdrop-filter: blur(14px) saturate(140%);
    -webkit-backdrop-filter: blur(14px) saturate(140%);
}

.playlist-action-button:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.16);
    transform: translateY(-1px);
    box-shadow: 0 12px 26px rgba(0, 0, 0, 0.28);
}

.playlist-action-button:active:not(:disabled) {
    transform: scale(0.94);
}

.playlist-action-button:disabled,
.playlist-action-button[hidden] {
    display: none;
}

.playlist-action-button.is-loading {
    position: relative;
    pointer-events: none;
}

.playlist-action-button.is-loading .playlist-action-icon {
    opacity: 0;
}

.playlist-action-button.is-loading::after {
    content: "";
    position: absolute;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.32);
    border-top-color: #ffffff;
    animation: spin 0.9s linear infinite;
}

.playlist-action-icon {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

.playlist-card__text {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.playlist-card__title {
    margin: 0;
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.playlist-status {
    margin: 0;
    font-size: 0.85rem;
    color: var(--text-muted);
    transition: color 0.3s ease;
}

.playlist-status--loading {
    color: rgba(255, 255, 255, 0.75);
}

.playlist-status--success {
    color: var(--success);
}

.playlist-status--error {
    color: var(--danger);
}

.playlist-status--info {
    color: rgba(255, 255, 255, 0.78);
}

.playlist-import-button {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.65rem 1.2rem;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.24);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.04));
    color: #ffffff;
    font-weight: 600;
    letter-spacing: -0.01em;
    cursor: pointer;
    transition: var(--transition-smooth);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    white-space: nowrap;
}

.playlist-import-button:hover {
    transform: translateY(-1px);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0.1));
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.25);
}

.playlist-import-button:active {
    transform: scale(0.97);
}

.playlist-import-button:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.playlist-import-button:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(250, 35, 59, 0.45);
}

.playlist-import-button .button-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 700;
    box-shadow: 0 10px 18px rgba(250, 35, 59, 0.4);
}

.playlist-up-next {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.85rem 1rem;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    transition: var(--transition-smooth);
}

.playlist-up-next__label {
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.6);
    font-weight: 700;
}

.playlist-up-next__value {
    font-size: 0.95rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
}

.playlist-up-next.hidden {
    display: none;
}

.playlist-clear-button {
    align-self: flex-start;
    padding: 0.35rem 0.5rem;
    background: transparent;
    border: none;
    color: rgba(255, 255, 255, 0.55);
    font-size: 0.8rem;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    font-weight: 600;
    cursor: pointer;
    transition: color 0.25s ease;
}

.playlist-clear-button:hover {
    color: rgba(255, 255, 255, 0.9);
}

.playlist-clear-button:focus-visible {
    outline: none;
    color: #ffffff;
    text-decoration: underline;
}

.playlist-modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.35s ease;
}

.playlist-modal.is-visible {
    opacity: 1;
    pointer-events: auto;
}

.playlist-modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(5, 5, 10, 0.75);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.playlist-modal__dialog {
    position: relative;
    width: min(440px, 92%);
    padding: 2rem 2.25rem;
    border-radius: 24px;
    background: rgba(12, 12, 22, 0.96);
    border: 1px solid rgba(255, 255, 255, 0.14);
    box-shadow: var(--shadow-large);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.playlist-modal__close {
    position: absolute;
    top: 18px;
    right: 18px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
    font-size: 1.25rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.playlist-modal__close:hover {
    background: rgba(255, 255, 255, 0.16);
}

.playlist-modal__close:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(250, 35, 59, 0.45);
}

.playlist-modal__subtitle {
    margin: 0;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
}

.playlist-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.playlist-form__label {
    font-size: 0.85rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.65);
    font-weight: 600;
}

.playlist-form__input {
    padding: 0.85rem 1rem;
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.playlist-form__input:focus {
    outline: none;
    border-color: rgba(250, 35, 59, 0.55);
    box-shadow: 0 0 0 3px rgba(250, 35, 59, 0.25);
}

.playlist-form__input::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

.playlist-form__error {
    margin: 0;
    min-height: 1.2rem;
    color: var(--danger);
    font-size: 0.8rem;
    font-weight: 600;
    visibility: hidden;
}

.playlist-form__actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

.playlist-form__button {
    padding: 0.65rem 1.25rem;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.24);
    font-weight: 600;
    letter-spacing: -0.01em;
    cursor: pointer;
    transition: var(--transition-fast);
    background: rgba(255, 255, 255, 0.08);
    color: #ffffff;
}

.playlist-form__button.secondary {
    background: transparent;
    border-color: rgba(255, 255, 255, 0.16);
    color: rgba(255, 255, 255, 0.72);
}

.playlist-form__button.primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
    border: none;
    box-shadow: 0 18px 36px rgba(250, 35, 59, 0.4);
}

.playlist-form__button:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.35);
}

.playlist-form__button:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    box-shadow: none;
}

.playlist-form__button:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(250, 35, 59, 0.35);
}

.playlist-modal .button-label::after {
    content: "";
}

.autoplay-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    width: 100%;
    padding: 1.25rem 1.5rem;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.25);
}

.autoplay-info {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.autoplay-heading {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    font-size: 1rem;
}

.autoplay-title {
    color: var(--text-primary);
}

.beta-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.1rem 0.55rem;
    border-radius: 999px;
    background: rgba(250, 35, 59, 0.15);
    color: var(--accent);
    border: 1px solid rgba(250, 35, 59, 0.35);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.autoplay-description {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.autoplay-next {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.8rem;
    transition: color 0.3s ease, opacity 0.3s ease;
}

.autoplay-next.highlight {
    color: var(--text-primary);
    font-weight: 600;
}

.autoplay-toggle {
    position: relative;
    width: 70px;
    height: 36px;
    border-radius: 999px;
    border: none;
    padding: 0;
    background: transparent;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.autoplay-toggle .toggle-track {
    position: absolute;
    inset: 0;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.18);
    border: 1px solid rgba(255, 255, 255, 0.18);
    transition: var(--transition-smooth);
}

.autoplay-toggle .toggle-thumb {
    position: absolute;
    top: 3px;
    left: 4px;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.65));
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
    transition: var(--transition-smooth);
}

.autoplay-toggle.is-active .toggle-track {
    background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
    border-color: transparent;
    box-shadow: 0 14px 34px rgba(250, 35, 59, 0.35);
}

.autoplay-toggle.is-active .toggle-thumb {
    left: calc(100% - 34px);
    background: linear-gradient(135deg, #ffffff, rgba(255, 255, 255, 0.85));
    box-shadow: 0 6px 18px rgba(250, 35, 59, 0.35);
}

.autoplay-toggle:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(250, 35, 59, 0.35);
}

.autoplay-toggle[aria-pressed="true"] {
    cursor: pointer;
}

.autoplay-toggle[aria-pressed="false"] .toggle-thumb {
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.45);
}

.autoplay-toggle.is-disabled,
.autoplay-toggle:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.volume-label {
    color: var(--text-secondary);
    min-width: 72px;
    font-size: 0.9375rem;
    font-weight: 500;
}

.volume-slider {
    flex: 1;
    height: 6px;
    accent-color: var(--accent);
    cursor: pointer;
    transition: var(--transition-fast);
    --volume-fill: 75%;
    background: linear-gradient(
        90deg,
        var(--accent) 0%,
        var(--accent) var(--volume-fill),
        rgba(255, 255, 255, 0.16) var(--volume-fill),
        rgba(255, 255, 255, 0.16) 100%
    );
    border-radius: 999px;
    appearance: none;
    position: relative;
    overflow: hidden;
}

.volume-slider:hover {
    opacity: 0.95;
}

.volume-slider:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    background: rgba(255, 255, 255, 0.12);
}

.volume-slider:disabled::-webkit-slider-thumb,
.volume-slider:disabled::-moz-range-thumb {
    display: none;
}

.volume-slider::-webkit-slider-runnable-track {
    height: 6px;
    border-radius: 999px;
    background: transparent;
}

.volume-slider::-webkit-slider-thumb {
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #ffffff;
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.2), 0 3px 10px rgba(0, 0, 0, 0.4);
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.volume-slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

.volume-slider::-moz-range-track {
    height: 6px;
    border-radius: 999px;
    background: transparent;
}

.volume-slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #ffffff;
    border: none;
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.2), 0 3px 10px rgba(0, 0, 0, 0.4);
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.volume-slider::-moz-range-thumb:hover {
    transform: scale(1.15);
}

.volume-label--disabled {
    color: var(--text-muted);
}

.lyrics-panel {
    display: flex;
    flex-direction: column;
    max-height: 640px;
}

.lyrics-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    flex-shrink: 0;
    border-bottom: 1px solid var(--border-subtle);
    padding-bottom: 1rem;
}

.lyrics-header h2 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.lyrics-status {
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.lyrics-container {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 1.25rem 1.25rem 1.25rem 0.5rem;
    margin: -1.25rem -1.25rem -1.25rem -0.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-height: 520px;
    scroll-behavior: smooth;
    scroll-snap-type: y proximity;
    mask-image: linear-gradient(to bottom, transparent 0%, rgba(0, 0, 0, 0.85) 6%, rgba(0, 0, 0, 1) 94%, transparent 100%);
    -webkit-mask-image: linear-gradient(to bottom, transparent 0%, rgba(0, 0, 0, 0.85) 6%, rgba(0, 0, 0, 1) 94%, transparent 100%);
}

.lyrics-container::-webkit-scrollbar {
    width: 6px;
}

.lyric-line {
    font-size: clamp(1rem, 1.4vw, 1.2rem);
    font-weight: 600;
    line-height: 1.4;
    letter-spacing: -0.01em;
    color: var(--text-muted);
    transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1),
        color 0.45s cubic-bezier(0.4, 0, 0.2, 1),
        opacity 0.45s cubic-bezier(0.4, 0, 0.2, 1),
        background 0.45s cubic-bezier(0.4, 0, 0.2, 1),
        box-shadow 0.45s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0.65;
    transform-origin: center;
    text-align: center;
    padding: 0.55rem 1.5rem;
    border-radius: 18px;
    scroll-snap-align: center;
}

.lyrics-panel .lyric-line.inactive {
    opacity: 0.35;
}

.lyrics-panel .lyric-line.active {
    color: #ffffff;
    opacity: 1;
    transform: scale(1.02);
    text-shadow: 0 12px 35px rgba(0, 0, 0, 0.55);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.22), rgba(255, 255, 255, 0.05));
    box-shadow: 0 16px 45px rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(18px) saturate(160%);
    -webkit-backdrop-filter: blur(18px) saturate(160%);
}

.lyrics-container::-webkit-scrollbar-track {
    background: transparent;
}

.lyrics-container::-webkit-scrollbar-thumb {
    background: var(--accent-light);
    border-radius: 4px;
}

.lyrics-container::-webkit-scrollbar-thumb:hover {
    background: rgba(250, 35, 59, 0.35);
}

.lyrics-placeholder {
    text-align: center;
    color: var(--text-muted);
    margin-top: 35%;
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.player-panel,
.lyrics-panel,
.search-result-card {
    animation: fadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.search-results {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: clamp(1rem, 2vw, 1.5rem);
    width: 100%;
    overflow: hidden;
    margin: 0;
    padding-bottom: 0.25rem;
}

.search-result-card {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: 1.25rem;
    padding: 1.5rem;
    background: var(--card-background);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-radius: 18px;
    border: 1px solid var(--border);
    cursor: pointer;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-subtle);
    width: 100%;
    min-width: 0;
    position: relative;
}

.search-result-card:hover {
    transform: translateY(-3px);
    background: var(--card-background-hover);
    box-shadow: var(--shadow);
    border-color: rgba(255, 255, 255, 0.18);
}

.search-result-card.active {
    border-color: var(--accent);
    background: linear-gradient(135deg, var(--accent-ultra-light), var(--card-background));
    box-shadow: 0 0 0 2px var(--accent-light), var(--shadow);
}

.search-result-card.active:hover {
    transform: translateY(-2px);
}

.result-art {
    width: 90px;
    height: 90px;
    border-radius: 14px;
    object-fit: cover;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.1);
    flex-shrink: 0;
}

.result-meta {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    flex: 1;
    min-width: 0;
    overflow: hidden;
}

.result-title {
    margin: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.result-artist,
.result-album {
    margin: 0;
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
}

.result-stats,
.result-extra {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    color: var(--text-muted);
    font-size: 0.75rem;
}

@media (max-width: 900px) {
    .search-results {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    }
}

@media (max-width: 720px) {
    .search-result-card {
        grid-template-columns: minmax(0, 1fr);
        text-align: center;
        gap: 1rem;
    }

    .result-meta {
        align-items: center;
        text-align: center;
    }

    .result-stats,
    .result-extra {
        justify-content: center;
    }
}

@media (max-width: 540px) {
    .result-art {
        width: 80px;
        height: 80px;
    }

    .search-result-card {
        padding: 1.25rem;
    }

    .search-results {
        gap: 0.9rem;
    }
}

@media (max-width: 1040px) {
    body {
        padding: 1.25rem;
    }

    .app {
        padding: clamp(1.5rem, 2vw, 2rem);
    }

    .content {
        grid-template-columns: 1fr;
        gap: clamp(1.25rem, 2.5vw, 1.75rem);
    }

    .player-panel,
    .lyrics-panel {
        min-height: auto;
    }

    .now-playing-card {
        grid-template-columns: 1fr;
        justify-items: center;
        text-align: center;
    }

    .artwork-wrapper {
        width: min(240px, 55vw);
    }

    .track-meta {
        align-items: center;
        gap: 0.5rem;
        text-align: center;
    }

    .progress-wrapper {
        flex-direction: column;
        align-items: stretch;
        min-width: 0;
    }
}

@media (max-width: 820px) {
    .app {
        padding: clamp(1.4rem, 3vw, 1.85rem);
        gap: clamp(1.25rem, 3vw, 1.75rem);
    }

    .player-panel,
    .lyrics-panel {
        padding: clamp(1.75rem, 4vw, 2rem);
    }

    .lyrics-panel {
        max-height: min(540px, 60vh);
    }

    .lyrics-container {
        max-height: min(420px, 52vh);
    }
}

@media (max-width: 640px) {
    :root {
        --mobile-header-offset: clamp(9.5rem, 32vh, 14rem);
    }

    body {
        padding: 0.85rem;
        padding-top: max(0.85rem, calc(env(safe-area-inset-top, 0px) + 0.35rem));
        padding-bottom: max(0.85rem, calc(env(safe-area-inset-bottom, 0px) + 0.35rem));
        padding-left: max(0.85rem, calc(env(safe-area-inset-left, 0px) + 0.35rem));
        padding-right: max(0.85rem, calc(env(safe-area-inset-right, 0px) + 0.35rem));
    }

    .app {
        gap: 1.25rem;
        padding: clamp(1.35rem, 5vw, 1.6rem);
        border-radius: 28px;
        border: 1px solid rgba(255, 255, 255, 0.08);
    }

    .app-title {
        font-size: 1.75rem;
    }

    .app-subtitle {
        font-size: 0.9rem;
    }

    .search-form {
        flex-direction: column;
        align-items: stretch;
        padding: 0.75rem;
        border-radius: 20px;
        max-width: 100%;
        gap: 0.5rem;
    }

    .search-input,
    .search-button {
        width: 100%;
        max-width: 100%;
    }

    .playlist-card {
        padding: 1.1rem 1.25rem;
        gap: 0.85rem;
    }

    .playlist-card__header {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
    }

    .playlist-import-button {
        width: 100%;
        justify-content: center;
    }

    .playlist-up-next {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .playlist-clear-button {
        align-self: stretch;
        text-align: center;
    }

    .transport-buttons {
        width: 100%;
        justify-content: center;
    }

    .autoplay-card {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .autoplay-toggle {
        align-self: flex-end;
    }

    .search-button {
        box-shadow: 0 8px 20px rgba(250, 35, 59, 0.35);
    }

    .content {
        display: flex;
        flex-direction: column;
        gap: 1.25rem;
        min-height: clamp(320px, calc(100dvh - var(--mobile-header-offset)), 100%);
    }

    .player-panel,
    .lyrics-panel {
        padding: 1.5rem;
    }

    .player-panel {
        position: sticky;
        top: calc(env(safe-area-inset-top, 0px) + 0.5rem);
        z-index: 3;
        box-shadow: 0 18px 36px rgba(0, 0, 0, 0.45);
    }

    .lyrics-panel {
        flex: 1 1 auto;
        display: flex;
        flex-direction: column;
        max-height: none;
        min-height: 0;
    }

    .lyrics-container {
        flex: 1 1 auto;
        max-height: none;
        min-height: 0;
        overflow-y: auto;
        padding-bottom: calc(env(safe-area-inset-bottom, 0px) + 0.75rem);
    }

    .controls-row {
        flex-direction: column;
        align-items: stretch;
    }

    .control-button {
        align-self: center;
        width: 64px;
        height: 64px;
    }

    .track-title {
        font-size: 1.65rem;
    }

    .track-artist {
        font-size: 1.05rem;
    }
}

@media (max-width: 480px) {
    body {
        padding: 0.75rem;
    }

    .app {
        padding: 1.35rem;
        border-radius: 24px;
        gap: 1rem;
    }

    .app-header {
        gap: 0.35rem;
    }

    .search-form {
        padding: 0.65rem;
    }

    .player-panel,
    .lyrics-panel {
        padding: 1.35rem;
    }

    .audio-controls {
        padding: 1.35rem;
        gap: 1.25rem;
    }

    .playlist-import-button {
        padding: 0.6rem 1rem;
    }

    .playlist-import-button .button-icon {
        width: 24px;
        height: 24px;
        font-size: 1rem;
    }

    .playlist-modal__dialog {
        padding: 1.75rem 1.5rem;
    }

    .playlist-modal__subtitle {
        font-size: 0.9rem;
    }

    .playlist-form__input {
        font-size: 0.9rem;
    }

    .autoplay-card {
        padding: 1.1rem 1.2rem;
    }

    .control-button {
        width: 58px;
        height: 58px;
        font-size: 1.4rem;
    }

    .progress-wrapper {
        width: 100%;
    }

    .track-details,
    .track-extra {
        gap: 0.75rem;
    }
}

@media (max-height: 900px) {
    body {
        align-items: flex-start;
    }

    .app {
        align-self: flex-start;
        margin-top: clamp(1rem, 3vh, 2rem);
        margin-bottom: clamp(1.5rem, 4vh, 3rem);
    }
}

@media (max-height: 720px) {
    body {
        padding: clamp(0.75rem, 2vh, 1.25rem);
    }

    .app {
        padding: clamp(1.25rem, 2.75vh, 1.75rem);
        gap: clamp(1.25rem, 3vh, 1.75rem);
    }

    .player-panel,
    .lyrics-panel {
        padding: clamp(1.25rem, 2.5vh, 1.65rem);
        min-height: auto;
    }

    .audio-controls {
        margin-top: 1.5rem;
    }
}

@media (max-height: 640px) {
    .lyrics-panel {
        max-height: none;
    }

    .lyrics-container {
        max-height: min(320px, 55vh);
    }
}