:root {
  --ink: #17212c;
  --soft: #5c6a79;
  --line: rgba(23, 33, 44, 0.16);
  --panel: rgba(255, 255, 255, 0.9);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 15%, rgba(60, 126, 255, 0.2), transparent 28%),
    radial-gradient(circle at 90% 85%, rgba(250, 113, 95, 0.22), transparent 30%),
    linear-gradient(180deg, #f2f4ee, #e8ebdf);
}

.shell {
  width: min(980px, calc(100vw - 28px));
  margin: 24px auto;
  display: grid;
  gap: 12px;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
  padding: 14px;
}

h1,
h2 {
  margin: 0;
}

p {
  color: var(--soft);
}

.slider-grid {
  margin-top: 10px;
  display: grid;
  gap: 10px;
}

label {
  display: grid;
  gap: 5px;
  font-weight: 700;
}

input[type="range"] {
  width: 100%;
}

button {
  margin-top: 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 14px;
  background: #fff;
  font-weight: 700;
  cursor: pointer;
}

.actions {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.86rem;
  color: var(--soft);
}

.profile-actions {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.profile-actions input,
.profile-actions select {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 10px;
  background: #fff;
}

.profile {
  margin-top: 10px;
  font-family: Consolas, monospace;
  font-size: 0.85rem;
}

.playlist {
  margin: 10px 0 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
}

.track {
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  padding: 9px;
}

.track h3 {
  margin: 0;
  font-size: 1rem;
}

.track p {
  margin: 6px 0 0;
}

.track button {
  margin-top: 8px;
}

.fav-btn {
  border-color: rgba(250, 113, 95, 0.3);
  color: #9b3c31;
}