:root {
  --bg: #0f0a1a;
  --bg-card: #1a1330;
  --bg-card-hover: #211a3c;
  --purple: #a855f7;
  --purple-dark: #7c3aed;
  --purple-light: #c084fc;
  --text: #f3f0fa;
  --text-dim: #a99fc2;
  --border: #35285c;
  --error: #f87171;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: radial-gradient(circle at top, #1b1233 0%, var(--bg) 60%);
  color: var(--text);
  min-height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.brand {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.brand span { color: var(--purple); }
.brand-logo { height: 32px; width: auto; border-radius: 6px; }

.hero-logo {
  height: 96px;
  width: auto;
  margin-bottom: 1rem;
  filter: drop-shadow(0 0 24px rgba(168, 85, 247, 0.45));
}

.topbar-link {
  color: var(--purple-light);
  text-decoration: none;
  font-weight: 600;
}
.topbar-link:hover { text-decoration: underline; }

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

.hero { text-align: center; margin-bottom: 2.5rem; }
.hero h1 {
  font-size: 2.4rem;
  margin: 0 0 0.5rem;
  background: linear-gradient(135deg, var(--purple-light), var(--purple-dark));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p { color: var(--text-dim); margin: 0; }

.username-box {
  max-width: 420px;
  margin: 0 auto 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.username-box label { font-size: 0.85rem; color: var(--text-dim); }
.username-box input {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.7rem 0.9rem;
  color: var(--text);
  font-size: 1rem;
}
.username-box input:focus {
  outline: none;
  border-color: var(--purple);
}
.error { color: var(--error); font-size: 0.82rem; margin: 0; }
.hidden { display: none; }

.products {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.25rem;
}

.loading { text-align: center; color: var(--text-dim); grid-column: 1 / -1; }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}
.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--purple-dark);
  transform: translateY(-2px);
}

.card h3 { margin: 0; font-size: 1.1rem; }
.card p { margin: 0; color: var(--text-dim); font-size: 0.9rem; flex-grow: 1; }

.price {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--purple-light);
}

.buy-btn {
  background: linear-gradient(135deg, var(--purple), var(--purple-dark));
  color: white;
  border: none;
  border-radius: 8px;
  padding: 0.7rem 1rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s ease;
}
.buy-btn:hover { opacity: 0.9; }
.buy-btn:disabled { opacity: 0.5; cursor: not-allowed; }

footer {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.8rem;
  padding: 1.5rem;
  border-top: 1px solid var(--border);
}