:root {
    color-scheme: light dark;
    --bg: #0f172a;
    --card: rgba(15, 23, 42, 0.85);
    --accent: #22d3ee;
    --text: #e2e8f0;
    --muted: #94a3b8;
}

body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #0f172a, #1e293b);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 2rem 1rem 4rem;
}

.container {
    width: min(960px, 100%);
    background: var(--card);
    border-radius: 18px;
    padding: 2.5rem 2rem;
    box-shadow: 0 25px 50px -12px rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(18px);
}

h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin: 0 0 1rem;
    text-align: center;
}

p.subtitle {
    text-align: center;
    color: var(--muted);
    margin-bottom: 2rem;
}

form {
    display: grid;
    gap: 1rem;
    margin-bottom: 2rem;
}

.artist-controls .form-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

label {
    font-weight: 600;
    letter-spacing: 0.02em;
}

input, button, select {
    font: inherit;
    padding: 0.85rem 1rem;
    border-radius: 12px;
    border: 1px solid rgba(148, 163, 184, 0.2);
    background: rgba(15, 23, 42, 0.6);
    color: inherit;
    outline: none;
    transition: border-color 0.2s ease, transform 0.2s ease;
}

input:focus, button:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.3);
}

input.locked {
    background: rgba(34, 211, 238, 0.15);
    border-color: rgba(34, 211, 238, 0.65);
    color: #0f172a;
    font-weight: 600;
    cursor: not-allowed;
}

button {
    cursor: pointer;
    background: linear-gradient(135deg, #22d3ee, #0ea5e9);
    color: #0f172a;
    font-weight: 700;
    border: none;
}

button:hover {
    transform: translateY(-1px);
}

button.secondary {
    background: transparent;
    color: var(--text);
    border: 1px solid rgba(148, 163, 184, 0.35);
}

button.secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
}

button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.status {
    padding: 1rem 1.25rem;
    border-radius: 12px;
    background: rgba(14, 165, 233, 0.15);
    border: 1px solid rgba(56, 189, 248, 0.35);
    color: #bae6fd;
    margin-bottom: 1.5rem;
}

.error {
    background: rgba(239, 68, 68, 0.12);
    border-color: rgba(248, 113, 113, 0.4);
    color: #fecaca;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: rgba(15, 23, 42, 0.7);
    border-radius: 14px;
    overflow: hidden;
}

th, td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid rgba(148, 163, 184, 0.1);
}

thead {
    background: rgba(15, 23, 42, 0.85);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.8rem;
}

tbody tr:last-child td {
    border-bottom: none;
}

.track-list {
    max-height: 200px;
    overflow-y: auto;
    border-radius: 12px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid rgba(148, 163, 184, 0.15);
    padding: 1rem;
    display: grid;
    gap: 0.4rem;
}

.track-list span {
    color: var(--muted);
    font-size: 0.85rem;
}

.guess-field {
    position: relative;
}

.suggestions {
    position: absolute;
    top: calc(100% + 0.25rem);
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.95);
    border: 1px solid rgba(148, 163, 184, 0.25);
    border-radius: 12px;
    padding: 0.35rem 0;
    box-shadow: 0 15px 30px rgba(15, 23, 42, 0.45);
    z-index: 10;
    max-height: 240px;
    overflow-y: auto;
}

.suggestions button {
    width: 100%;
    text-align: left;
    padding: 0.65rem 1rem;
    background: transparent;
    color: inherit;
    border: none;
    border-radius: 0;
    font-weight: 500;
}

.suggestions button:hover,
.suggestions button:focus,
.suggestions button.active {
    background: rgba(34, 211, 238, 0.15);
    border: none;
    color: var(--accent);
}

.suggestions-empty {
    padding: 0.65rem 1rem;
    color: var(--muted);
    font-size: 0.85rem;
}

.hidden {
    display: none !important;
}

@media (max-width: 720px) {
    body {
        padding: 1.5rem 1rem;
    }
    table {
        font-size: 0.85rem;
    }
    th, td {
        padding: 0.6rem 0.75rem;
    }
}