:root {
    --bg: #0f0f1a;
    --surface: #1a1a2e;
    --surface-light: #252540;
    --primary: #ff2d95;
    --primary-hover: #ff5cae;
    --secondary: #7b2dff;
    --secondary-hover: #9a5fff;
    --text: #f0f0f5;
    --text-muted: #a0a0b5;
    --radius: 16px;
    --radius-sm: 10px;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    --shadow-glow: 0 0 20px rgba(255, 45, 149, 0.25);
    --transition: 0.2s ease;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.app {
    max-width: 520px;
    margin: 0 auto;
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.app__header {
    text-align: center;
    margin-bottom: 28px;
}

.app__logo {
    width: min(220px, 70vw);
    height: auto;
    filter: drop-shadow(0 4px 12px rgba(255, 45, 149, 0.25));
}

.app__tagline {
    color: var(--text-muted);
    font-size: 1rem;
    margin: 8px 0 0;
    letter-spacing: 0.03em;
}

.app__main {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

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

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
    color: white;
    padding: 14px 22px;
}

.button:hover { transform: translateY(-2px); }
.button:active { transform: translateY(0); }

.button__icon {
    font-size: 1.2em;
    line-height: 1;
}

.button--primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    box-shadow: var(--shadow-glow);
}

.button--primary:hover {
    box-shadow: 0 0 28px rgba(255, 45, 149, 0.4);
}

.button--secondary {
    background: var(--surface);
    border: 1px solid var(--surface-light);
}

.button--secondary:hover { background: var(--surface-light); }

.button--ghost {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--text);
}

.button--ghost:hover { background: rgba(255, 255, 255, 0.14); }

.button--large {
    width: 100%;
    padding: 18px 24px;
    font-size: 1.1rem;
}

.button--small {
    padding: 10px 16px;
    font-size: 0.9rem;
    background: var(--surface-light);
    margin-top: 8px;
}

.scanner {
    position: relative;
    display: none;
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--surface);
    box-shadow: var(--shadow);
}

.scanner--active { display: block; }

.scanner__video {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    background: #000;
}

.scanner .button {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(6px);
}

.song-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.info-card {
    background: var(--surface);
    border-radius: var(--radius-sm);
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    box-shadow: var(--shadow);
}

.info-card__label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
}

.info-card__value {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text);
    word-break: break-word;
}

.settings {
    background: var(--surface);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.settings__toggle-input:checked ~ .settings__panel { display: block; }

.settings__toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px;
    cursor: pointer;
    font-weight: 600;
    user-select: none;
    transition: background var(--transition);
}

.settings__toggle:hover { background: var(--surface-light); }

.settings__icon {
    font-size: 1.2rem;
    transition: transform var(--transition);
}

.settings__toggle-input:checked + .settings__toggle .settings__icon { transform: rotate(90deg); }

.settings__panel {
    display: none;
    padding: 0 16px 16px;
}

.settings__group {
    padding: 16px 0;
    border-top: 1px solid var(--surface-light);
}

.settings__group:first-of-type { border-top: none; }

.settings__heading {
    margin: 0 0 12px;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--primary);
}

.checkbox {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    margin-bottom: 12px;
    font-size: 0.95rem;
}

.checkbox input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.checkbox__box {
    width: 22px;
    height: 22px;
    border-radius: 6px;
    background: var(--surface-light);
    border: 2px solid var(--text-muted);
    display: grid;
    place-items: center;
    transition: background var(--transition), border-color var(--transition);
    flex-shrink: 0;
}

.checkbox input:checked + .checkbox__box {
    background: var(--primary);
    border-color: var(--primary);
}

.checkbox input:checked + .checkbox__box::after {
    content: "✓";
    color: white;
    font-size: 0.85rem;
    font-weight: 700;
}

.input-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 0.95rem;
    color: var(--text-muted);
}

.input-field input {
    padding: 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--surface-light);
    background: var(--bg);
    color: var(--text);
    font-size: 1rem;
    outline: none;
}

.input-field input:focus { border-color: var(--primary); }

.settings__cookies {
    display: block;
    margin: 8px 0;
    font-size: 0.85rem;
    color: var(--text-muted);
    word-break: break-all;
}

.player {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    min-height: 220px;
    background: var(--surface);
    display: grid;
    place-items: center;
    color: var(--text-muted);
}

.player__placeholder {
    font-size: 0.95rem;
}

.app__footer {
    text-align: center;
    margin-top: 32px;
    padding-top: 24px;
    color: var(--text-muted);
    font-size: 0.8rem;
    line-height: 1.6;
}

.app__footer p { margin: 4px 0; }

@media (min-width: 480px) {
    .actions { flex-direction: row; }
    .button--large { flex: 1; }
}
.button--ready {
    background: #22c55e;
}

.button--playing {
    background: #ef4444;
}

.button--buffering {
    background: #f59e0b;
    cursor: wait;
}