:root {
    --glass: #14141c73;
    --text: #f2f2f7;
    --muted: #b7b7c3;
    --accent: #8b5cf6;
    --accent-2: #22d3ee;
}

*{box-sizing: border-box; }
html, body {height: 100%; }
body {
    margin: 0;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Inter, Helvetica, Arial, sans-serif;
    color: var(--text);
    background: #0b0b12;
    overflow: hidden;
}

.bg-layer {
    position: fixed; inset: 0; z-index: 0;
    background: #0b0b12 center/cover no-repeat;
}
.bg-layer::after {
    content: ""; position: absolute; inset: 0; z-index: 1;
    background: radial-gradient(80% 100% at 50% 20%, #0000001a, #000000a6),
                linear-gradient(to bottom, #00000033, #000000bf);
}
#bgVideo, #bgImage {
    position: absolute; inset: 0; z-index: 0;
    width: 100%; height: 100%; object-fit: cover;
}
#bgImage { display: none; }

.app { position: relative; z-index: 2; height: 100vh; display: grid; grid-template-rows: auto 1fr auto; }

header {
    display: grid; grid-template-columns: 1fr auto; gap: 16px;
    align-items: center; padding: 12px 16px;
    background: linear-gradient(to bottom, #00000073, #00000000);
}
.header-inner { display:flex; align-items: center; gap: 14px; }

.glass {
    background: var(--glass);
    backdrop-filter: blur(10px) saturate(120%);
    -webkit-backdrop-filter: blur(10px) saturate(120%);
    border: 1px solid #ffffff1f;
    border-radius: 16px;
    box-shadow: 0 10px 30px #00000040;
}

.player {display: grid; grid-template-columns: 56px 1fr auto; gap: 10px; align-items: center; padding: 10px; min-width: 260px; }
.mv-thumb {width: 56px; height: 56px; border-radius: 10px; overflow: hidden; border: 1px solid #ffffff1f; }
.mv-thumb video {width: 100%; height: 100%; object-fit: cover; }
.track-meta {line-height: 1.2;}
.track-title {font-weight:700; font-size: 14px; }
.track-artist {font-size: 12px; color: var(--muted); }

.controls {display: flex; align-items: center; gap: 8px; }
.btn {
    appearance: none; border: none; outline: none; cursor: pointer; user-select: none;
    padding: 8px 10px; border-radius: 12px; color: var(--text); background: #ffffff1a;
    transition: transform .08s ease, background .2s ease;
}
.btn:hover { background: #ffffff2e; transform: scale(1.1); }
.btn:active { transform: translateY(1px) scale(0.98); }

.avatar {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    object-fit: cover;
    display: block;
}

main {position: relative; display: grid; place-items: center; padding: 12px; }

.content {
    width: min(100%, 1100px);
    display: grid; grid-template-columns: 1fr; gap: 14px; padding: 16px;
}

.card {
    padding: 18px; border-radius: 18px; position: relative;
}

.chip {display: inline-flex; gap: 8px; align-items: center; font-size: 12px; color: #eaeaf1; opacity: 0.9; #ffffff17; border: 1px solid #ffffff1a; padding: 6px 10px; border-radius: 999px; }

.title {font-size: clamp (22px, 3.6vw, 36px); margin: 6px 0 4px; font-weight: 900; }
.subtitle {font-size: clamp(14px, 2.4vw, 18px); color: var(--muted); margin: 0 0 8px; }
.copy {font-size: clamp (14px, 2.2vw, 17px); line-height: 1.6; color: #f1f1f5; }

.nav-arrow {
    position: absolute; top: 50%; transform: translateY(-50%); z-index: 3;
    width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center;
    background: #00000059;
    border: 1px solid #ffffff26;
    backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
    color: var(--text);
}

.nav-arrow.left {left: 10px; }
.nav-arrow.right {right: 10px; }

footer {padding: 14px 16px; display: grid; gap: 8px; background: linear-gradient(to top, #0000008c, #00000000); }
.footer-inner {display: grid; grid-template-columns: 1fr auto; gap: 12px; align-items: center; }
.socials {display:flex; flex-wrap: wrap; gap: 8px; }
.socials a { text-decoration: none; color: var(--text); font-size: 14px; padding: 8px 12px; border: 1px solid #ffffff1f; border-radius: 999px; background: #ffffff0f; }
.contact {font-size: 14px; color: var(--muted); }

@media (max-width: 640px) {
    header {grid-template-columns: 1fr; gap: 10px; }
    .player {grid-template-columns: 48px 1fr auto; }
    .mv-thumb {width: 48px; height: 48px; }
    .nav-arrow {width: 40px; height: 40px; }
}