:root {
  --bg: #0f0f10;
  --panel: #121316;
  --ink: #e5e7eb;
  --muted: #a1a1aa;
  --line: #32343a;
  --wrap: 1100px;
  --radius: 14px;
  --star: #fbbf24;
  --btn: #2563eb;
  --btn-hover: #1d4ed8;
}

* {
  box-sizing: border-box
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 Inter, system-ui, Segoe UI, Roboto, Arial, sans-serif
}

/* Header */
.header {
  background: #0b0c0e;
  border-bottom: 1px solid var(--line)
}

.container {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 16px
}

.topbar {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 10px 0
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 20px
}

.logo-square {
  width: 36px;
  height: 36px;
  border: 1px solid #9ca3af;
  border-radius: 6px;
  display: grid;
  place-items: center;
  font-size: 12px;
  color: #d1d5db
}

.nav {
  margin-left: auto
}

.nav ul {
  list-style: none;
  display: flex;
  gap: 16px;
  margin: 0;
  padding: 0
}

.nav a {
  color: #e5e7eb;
  text-decoration: none;
  padding: 8px 10px;
  border-radius: 8px
}

.nav a:hover {
  background: #1b1c21
}

.login {
  color: #c7c9cf;
  font-size: 14px
}

/* Panel */
.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  padding: 22px;
  margin: 28px 0
}

.album-title {
  margin: 0 0 12px;
  font-size: 22px
}

.controls {
  margin-bottom: 12px
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid #d1d5db;
  border-radius: 10px;
  background: #0f0f10;
  color: #e5e7eb;
  cursor: pointer
}

.btn:before {
  content: "▶";
  font-size: 12px
}

/* Album description */
.album-desc {
  margin: 0 0 14px;
  color: #d9dbe1
}

.picture {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: repeating-linear-gradient(135deg, #16181d 0 14px, #121418 14px 28px);
  height: 260px;
  display: grid;
  place-items: center;
  color: #9aa0a6;
  font-size: 36px;
  margin: 14px 0
}

/* Meta */
.meta {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 16px;
  align-items: center;
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 16px
}

.meta .tags span {
  margin-left: 6px
}

.duration {
  justify-self: center
}

.rating {
  justify-self: end
}

/* Extra info */
.extra {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 16px;
  align-items: center;
  margin-top: 12px;
  color: #cfd3da
}

.release {
  text-align: left
}

.cart {
  text-align: center
}

.author {
  text-align: right
}

.btn-cart {
  display: inline-block;
  padding: 10px 18px;
  background: var(--btn);
  color: #fff;
  border-radius: 12px;
  font-weight: 700;
  text-decoration: none
}

.btn-cart:hover {
  background: var(--btn-hover)
}

/* Footer */
.footer {
  max-width: var(--wrap);
  margin: 28px auto 40px;
  padding: 12px 16px;
  color: var(--muted);
  text-align: center;
  border-top: 1px solid var(--line)
}

/* Responsive */
@media (max-width:720px) {
  .meta {
    grid-template-columns: 1fr;
    gap: 8px
  }

  .duration,
  .rating {
    justify-self: start
  }

  .extra {
    grid-template-columns: 1fr;
    gap: 8px;
    text-align: left
  }
}