:root {
  --bg: #090c14;
  --surface: #131826;
  --surface-2: #1a2031;
  --text: #f1f3f8;
  --muted: #9aa3b8;
  --accent: #6c8cff;
  --danger: #ff6b8a;
  --success: #48d597;
  --border: #2a334a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, Segoe UI, Arial, sans-serif;
  background: radial-gradient(circle at top, #111833 0%, var(--bg) 60%);
  color: var(--text);
}

a {
  color: var(--accent);
  text-decoration: none;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  background: rgba(9, 12, 20, 0.85);
  position: sticky;
  top: 0;
  backdrop-filter: blur(8px);
}

.brand {
  font-weight: 700;
  font-size: 1.1rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
}

.container {
  width: min(1100px, 94vw);
  margin: 1.5rem auto 3rem;
  display: grid;
  gap: 1rem;
}

.card {
  background: linear-gradient(180deg, var(--surface) 0%, var(--surface-2) 100%);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.2rem;
}

.hero h1,
h1,
h2 {
  margin-top: 0;
}

.song-grid {
  display: grid;
  gap: 0.85rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.song-card {
  background: #101626;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.9rem;
}

.audio-player {
  width: 100%;
  margin-top: 0.6rem;
}

.btn {
  border: 1px solid var(--accent);
  background: var(--accent);
  color: white;
  border-radius: 10px;
  padding: 0.55rem 0.9rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-block;
}

.btn.ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}

.btn.small {
  padding: 0.45rem 0.75rem;
  font-size: 0.9rem;
}

.input {
  width: 100%;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #0f1422;
  color: var(--text);
  padding: 0.65rem 0.75rem;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.auth-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1rem;
}

.auth-form,
.upload-form {
  display: grid;
  gap: 0.55rem;
}

.auth-form {
  width: min(450px, 95vw);
}

.muted {
  color: var(--muted);
}

.notice {
  color: #bfd0ff;
}

.error {
  color: var(--danger);
}

.success {
  color: var(--success);
}

@media (max-width: 680px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .container {
    width: min(100%, 96vw);
    margin-top: 0.8rem;
  }
}