:root {
    --primary: #ff4757;
    --dark: #0a0a0a;
    --glass: rgba(255, 255, 255, 0.1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    height: 100vh;
    background: url('background-rock.jpg') no-repeat center center/cover fixed;
    font-family: 'Arial Black', sans-serif;
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
}

.overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(0deg, rgba(0,0,0,0.9) 20%, rgba(0,0,0,0.4) 100%);
    z-index: 1;
}

.container {
    position: relative;
    z-index: 2;
    width: 90%;
    max-width: 800px;
    background: var(--glass);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255,255,255,0.1);
    padding: 30px;
    border-radius: 20px;
    text-align: center;
}

h1 { font-size: 3.5rem; letter-spacing: -2px; color: var(--primary); }
.tagline { font-size: 0.9rem; letter-spacing: 5px; margin-bottom: 30px; opacity: 0.7; }

/* Moldura da Imagem */
.art-section { margin-bottom: 30px; }
.frame {
    position: relative;
    border: 5px solid white;
    border-bottom: 40px solid white; /* Estilo Polaroid Rock */
    box-shadow: 0 10px 30px rgba(0,0,0,0.8);
    transform: rotate(-1deg);
}
.rock-img { width: 100%; display: block; filter: grayscale(20%) contrast(120%); }
.frame-label {
    position: absolute;
    bottom: -32px; width: 100%;
    color: black; font-size: 0.8rem; font-weight: bold;
}

/* Player */
.player-container {
    background: rgba(0,0,0,0.6);
    padding: 20px;
    border-radius: 15px;
}
.track-info { margin-bottom: 15px; }
.track-name { display: block; font-size: 1.2rem; }
.artist-name { font-size: 0.8rem; color: var(--primary); }

#playPauseBtn {
    background: var(--primary);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    font-size: 1.2rem;
    transition: 0.3s;
}
#playPauseBtn:hover { transform: scale(1.1); filter: brightness(1.2); }

.timeline-box {
    display: flex; align-items: center; gap: 10px; margin-top: 15px;
    font-family: monospace;
}
input[type="range"] { flex-grow: 1; accent-color: var(--primary); cursor: pointer; }