* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: #181818;
    color: #fff;
}

button,
select,
input {
    font: inherit;
}

button {
    border: 0;
    border-radius: 0.4rem;
    padding: 0.65rem 1rem;
    cursor: pointer;
    background: #222;
    color: #fff;
}

button.secondary {
    background: #ddd;
    color: #222;
}

#player-panel {
    position: relative;
    min-height: 38vh;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    background-color: #242424;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}

.player-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.42);
}

.player-content {
    position: relative;
    z-index: 1;
}

#now-category {
    font-size: 0.95rem;
    opacity: 0.85;
}

#now-title {
    margin: 0.2rem 0 1rem;
    font-size: clamp(1.4rem, 3vw, 2rem);
    font-weight: 700;
}

audio {
    width: 100%;
}

#selection-panel {
    flex: 1;
    padding: 1.5rem;
    overflow-y: auto;
    background: #f5f5f5;
    color: #222;
}

.selection-header {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: center;
    margin-bottom: 1rem;
}

.category-bar {
    display: flex;
    gap: 0.6rem;
    align-items: center;
}

.category-bar select {
    min-width: 14rem;
    max-width: 60vw;
    padding: 0.45rem;
}

.track {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    padding: 0.65rem 0.25rem;
    cursor: pointer;
    border-bottom: 1px solid #ddd;
}

.track:hover {
    background: #e9e9e9;
}

.playlist-summary {
    margin-top: 1.5rem;
    font-weight: 700;
}

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1rem;
}

#empty-state {
    padding: 1rem 0;
    color: #555;
}

.login-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    background: #181818;
}

.login-card {
    width: min(92vw, 24rem);
    padding: 2rem;
    border-radius: 0.6rem;
    background: #f5f5f5;
    color: #222;
}

.login-card form {
    display: grid;
    gap: 0.8rem;
}

.login-card input {
    padding: 0.6rem;
}

.error {
    color: #8b0000;
}

@media (max-width: 640px) {
    #player-panel {
        min-height: 30vh;
        padding: 1rem;
    }

    #selection-panel {
        padding: 1rem;
    }

    .selection-header {
        align-items: flex-start;
    }

    .category-bar {
        align-items: flex-start;
        flex-direction: column;
    }

    .category-bar select {
        min-width: 0;
        width: 100%;
        max-width: 100%;
    }
}