:root {
  --bg: linear-gradient(135deg, #0f172a, #1e293b, #0f172a);
  --card: #0b1224;
  --muted: #9fb3c8;
  --text: #e5edf5;
  --accent: #22c55e;
  --accent-2: #38bdf8;
  --danger: #ef4444;
  --shadow: 0 15px 45px rgba(0, 0, 0, 0.25);
  --radius: 16px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}
header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(10, 15, 28, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.nav {
  max-width: 1100px;
  margin: 0 auto;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.brand {
  font-weight: 700;
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
  box-shadow: 0 0 16px rgba(34, 197, 94, 0.6);
}
.nav-actions {
  display: flex;
  gap: 10px;
}
.nav button {
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: var(--text);
  padding: 10px 14px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  font-weight: 600;
}
.nav button.active {
  background: var(--accent-2);
  color: #07111f;
  border-color: transparent;
}
main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 16px 64px;
  display: grid;
  gap: 24px;
}
.view {
  background: rgba(10, 15, 28, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
}
.hidden { display: none; }
h1, h2, h3 {
  margin: 0 0 10px;
  letter-spacing: 0.01em;
}
p { color: var(--muted); line-height: 1.6; }
.grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.04);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
  display: grid;
  gap: 10px;
  transition: transform 0.2s, border-color 0.2s;
  cursor: pointer;
}
.card:hover {
  transform: translateY(-3px);
  border-color: rgba(56, 189, 248, 0.6);
}
.price {
  font-weight: 700;
  color: var(--accent);
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.12);
  color: var(--text);
  font-size: 14px;
  border: 1px solid rgba(56, 189, 248, 0.25);
}
.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.btn {
  border: none;
  border-radius: 12px;
  padding: 12px 14px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, background 0.2s;
}
.btn-primary {
  background: var(--accent-2);
  color: #07111f;
  box-shadow: 0 10px 24px rgba(56, 189, 248, 0.35);
}
.btn-primary:hover { transform: translateY(-1px); }
.btn-ghost {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.06);
}
form {
  display: grid;
  gap: 12px;
  margin-top: 12px;
}
label {
  font-weight: 600;
}
input, select, textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font-size: 15px;
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid rgba(56, 189, 248, 0.5);
  border-color: transparent;
}
.inline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
}
.summary {
  background: rgba(255, 255, 255, 0.03);
  padding: 12px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}
.muted { color: var(--muted); }
.list {
  display: grid;
  gap: 10px;
  margin-top: 10px;
}
.list-item {
  padding: 12px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
}
.alert {
  padding: 12px;
  border-radius: 12px;
  background: rgba(34, 197, 94, 0.12);
  border: 1px solid rgba(34, 197, 94, 0.3);
  color: #befae1;
  margin-top: 10px;
}
.error {
  background: rgba(239, 68, 68, 0.12);
  border-color: rgba(239, 68, 68, 0.35);
  color: #fed7d7;
}
@media (max-width: 640px) {
  .nav { flex-direction: column; align-items: flex-start; }
  .nav-actions { width: 100%; }
  .nav button { flex: 1; text-align: center; }
}