:root {
    color-scheme: dark;
    --bg: #030303;
    --panel: rgba(15, 15, 17, .92);
    --panel-strong: #111114;
    --line: rgba(120, 120, 128, .24);
    --logo: #2b2b2f;
    --text: #f4f4f5;
    --muted: #a6a6ad;
    --accent: #d7d7d9;
    --accent-dark: #1f1f23;
    --danger: #b91c1c;
    --danger-light: #ef4444;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: Inter, Montserrat, system-ui, Arial, sans-serif;
    background:
        radial-gradient(circle at 50% 8%, rgba(85, 85, 92, .26), transparent 30rem),
        radial-gradient(circle at 16% 28%, rgba(60, 60, 66, .22), transparent 22rem),
        linear-gradient(145deg, #000 0%, #070708 46%, #151519 100%);
    color: var(--text);
    min-height: 100vh;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image: linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
    background-size: 44px 44px;
    mask-image: radial-gradient(circle at center, black, transparent 78%);
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 2;
    display: flex;
    gap: 1rem;
    align-items: center;
    justify-content: space-between;
    padding: .8rem 1.5rem;
    background: rgba(0, 0, 0, .86);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
}

.brand {
    display: flex;
    align-items: center;
    gap: .9rem;
    color: var(--text);
    text-decoration: none;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.brand img {
    width: 74px;
    height: 74px;
    object-fit: contain;
    filter: drop-shadow(0 0 18px rgba(180, 180, 190, .14));
}

.brand strong,
.info strong { display: block; }

.brand small {
    display: block;
    margin-top: .2rem;
    color: var(--muted);
    font-size: .72rem;
    letter-spacing: .28em;
}

.switch {
    display: flex;
    align-items: center;
    gap: .6rem;
    color: var(--muted);
    font-weight: 800;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.switch input { display: none; }

.switch span {
    width: 4rem;
    height: 2rem;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: #111114;
    position: relative;
    box-shadow: inset 0 0 20px rgba(255,255,255,.06);
}

.switch span::before {
    content: "";
    position: absolute;
    width: 1.55rem;
    height: 1.55rem;
    left: .22rem;
    top: .17rem;
    border-radius: 50%;
    background: linear-gradient(145deg, #f7f7f8, #8b8b92);
    transition: .2s;
}

.switch input:checked + span { background: #2b2b2f; }
.switch input:checked + span::before { transform: translateX(2rem); }

main {
    max-width: 1120px;
    margin: 0 auto;
    padding: 2rem 1rem 3rem;
}

.panel {
    position: relative;
    overflow: hidden;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 28px;
    padding: 1.5rem;
    box-shadow: 0 24px 80px rgba(0,0,0,.55), inset 0 1px rgba(255,255,255,.05);
}

.panel::before {
    content: "";
    position: absolute;
    inset: -18rem auto auto 50%;
    width: 34rem;
    height: 34rem;
    transform: translateX(-50%);
    background: url("fe-logo.svg") center / contain no-repeat;
    opacity: .05;
    pointer-events: none;
}

.panel > * { position: relative; }

h1 {
    margin: .1rem 0 .7rem;
    font-size: clamp(2rem, 5vw, 4rem);
    line-height: .95;
    letter-spacing: -.04em;
}

h2 { margin-top: 2rem; }

.eyebrow {
    margin: 0 0 .4rem;
    color: var(--accent);
    font-weight: 900;
    letter-spacing: .22em;
    text-transform: uppercase;
}

.hidden { display: none !important; }
.muted { color: var(--muted); }

.searchbox {
    display: flex;
    gap: .75rem;
    margin: 1.2rem 0;
}

.searchbox input,
.login input,
.edit input {
    flex: 1;
    background: #050506;
    border: 1px solid var(--line);
    color: var(--text);
    border-radius: 14px;
    padding: .95rem 1rem;
    outline: none;
}

.searchbox input:focus,
.login input:focus,
.edit input:focus {
    border-color: rgba(215,215,217,.72);
    box-shadow: 0 0 0 4px rgba(215,215,217,.08);
}

button {
    border: 0;
    border-radius: 14px;
    padding: .85rem 1.05rem;
    background: linear-gradient(145deg, #f1f1f2, #a7a7ae);
    color: #08080a;
    font-weight: 900;
    cursor: pointer;
    letter-spacing: .04em;
}

button:disabled { opacity: .42; cursor: not-allowed; }
.ghost { background: #24242a; color: var(--text); border: 1px solid var(--line); }
.danger { width: 100%; margin-top: 2rem; background: linear-gradient(145deg, var(--danger-light), var(--danger)); color: #fff; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1rem; }

.card,
.song {
    display: flex;
    gap: 1rem;
    align-items: center;
    background: rgba(5, 5, 6, .84);
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 1rem;
    margin: .75rem 0;
}

.cover { width: 58px; height: 58px; border-radius: 14px; object-fit: cover; background: #25252a; }
.info { flex: 1; }
.meta { color: var(--muted); font-size: .85rem; margin-top: .25rem; }
.badge { background: #24242a; border: 1px solid var(--line); border-radius: 999px; padding: .35rem .7rem; font-weight: 900; }
.played { opacity: .52; }
.controls { display: flex; gap: .4rem; flex-wrap: wrap; }
.controls button { padding: .55rem .75rem; }
.login { max-width: 430px; margin: auto; }
.error { color: #fca5a5; }

.edit {
    display: grid;
    grid-template-columns: 1fr 1fr 90px auto;
    gap: .5rem;
    width: 100%;
    margin-top: .75rem;
}

@media (max-width: 760px) {
    .topbar { flex-wrap: wrap; padding: .75rem 1rem; }
    .brand img { width: 58px; height: 58px; }
    .brand small { letter-spacing: .16em; }
    .searchbox,
    .song { align-items: stretch; flex-direction: column; }
    .edit { grid-template-columns: 1fr; }
    .controls { width: 100%; }
}