:root {
  --bg: #070914;
  --panel: rgba(18, 24, 48, 0.78);
  --panel-strong: rgba(28, 35, 70, 0.92);
  --border: rgba(164, 177, 255, 0.18);
  --text: #f5f7ff;
  --muted: #aeb7d8;
  --purple: #8b5cf6;
  --blue: #22d3ee;
  --green: #34d399;
  --danger: #fb7185;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.38);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 15% 10%, rgba(139, 92, 246, 0.24), transparent 32rem),
    radial-gradient(circle at 85% 5%, rgba(34, 211, 238, 0.17), transparent 28rem),
    linear-gradient(135deg, #070914, #11172b 52%, #090b18);
}

a { color: inherit; text-decoration: none; }
code { color: var(--blue); }
.page-shell { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.navbar {
  position: sticky;
  top: 14px;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  margin: 14px 0 34px;
  padding: 14px 18px;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: rgba(10, 14, 31, 0.78);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}
.brand { display: flex; align-items: center; gap: 10px; font-size: 1.25rem; font-weight: 900; letter-spacing: .02em; }
.brand-gem { color: var(--blue); filter: drop-shadow(0 0 12px var(--blue)); }
.nav-user { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; justify-content: flex-end; }
.avatar { width: 38px; height: 38px; border-radius: 10px; image-rendering: pixelated; border: 1px solid var(--border); }
.username { font-weight: 800; }
.balance-pill, .cart-badge, .status {
  padding: 7px 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(139, 92, 246, .28), rgba(34, 211, 238, .22));
  border: 1px solid var(--border);
  font-weight: 800;
}
.nav-link, .cart-link { color: var(--muted); font-weight: 700; }
.nav-link:hover, .cart-link:hover { color: var(--text); }
.hero { min-height: 55vh; display: grid; place-items: center; }
.hero-card, .auth-card, .glass-card, .summary-card, .item-card, .cart-row {
  border: 1px solid var(--border);
  border-radius: 28px;
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}
.hero-card { padding: clamp(30px, 6vw, 72px); text-align: center; max-width: 850px; }
h1 { margin: 0 0 14px; font-size: clamp(2rem, 5vw, 4.5rem); line-height: .98; }
h2 { margin: 0 0 8px; }
p { color: var(--muted); line-height: 1.6; }
.eyebrow { color: var(--blue); text-transform: uppercase; letter-spacing: .2em; font-size: .78rem; font-weight: 900; }
.hero-text { max-width: 680px; margin: 0 auto 28px; font-size: 1.08rem; }
.hero-actions, .filters, .section-head { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.hero-actions { justify-content: center; }
.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  border: 0;
  border-radius: 14px;
  padding: 12px 18px;
  color: white;
  background: linear-gradient(135deg, var(--purple), var(--blue));
  font-weight: 900;
  cursor: pointer;
  box-shadow: 0 12px 30px rgba(34, 211, 238, .18);
}
.btn:hover { transform: translateY(-1px); }
.btn:disabled { opacity: .58; cursor: not-allowed; transform: none; }
.btn-secondary { background: rgba(255,255,255,.08); border: 1px solid var(--border); box-shadow: none; }
.btn-danger { background: rgba(251, 113, 133, .22); border: 1px solid rgba(251, 113, 133, .4); box-shadow: none; }
.btn-small { padding: 9px 13px; border-radius: 12px; }
.full { width: 100%; }
.feature-grid, .shop-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.glass-card { padding: 24px; }
.auth-wrap { min-height: 65vh; display: grid; place-items: center; }
.auth-card { width: min(460px, 100%); padding: 30px; }
label { display: grid; gap: 8px; margin: 16px 0; color: var(--muted); font-weight: 800; }
input, select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 13px 14px;
  color: var(--text);
  background: rgba(3, 6, 18, .55);
  outline: none;
}
input:focus { border-color: var(--blue); box-shadow: 0 0 0 4px rgba(34, 211, 238, .12); }
.alert { margin: 16px 0; padding: 14px 16px; border-radius: 16px; background: rgba(34, 211, 238, .12); border: 1px solid var(--border); }
.alert-error { background: rgba(251, 113, 133, .13); border-color: rgba(251, 113, 133, .36); }
.alert-success { background: rgba(52, 211, 153, .13); border-color: rgba(52, 211, 153, .34); }
.section-head { justify-content: space-between; margin-bottom: 22px; }
.section-head h1 { font-size: clamp(2rem, 4vw, 3.5rem); }
.filters { margin-bottom: 22px; }
.chip { padding: 10px 14px; border-radius: 999px; background: rgba(255,255,255,.07); color: var(--muted); border: 1px solid var(--border); font-weight: 800; }
.chip.active, .chip:hover { color: var(--text); background: rgba(139, 92, 246, .24); }
.item-card { overflow: hidden; display: grid; grid-template-rows: 170px 1fr; }
.item-image { display: grid; place-items: center; background: linear-gradient(135deg, rgba(139,92,246,.24), rgba(34,211,238,.16)); }
.item-image span { font-size: 4rem; color: var(--blue); filter: drop-shadow(0 0 20px var(--blue)); }
.item-image img { width: 100%; height: 100%; object-fit: cover; }
.item-content { padding: 20px; display: grid; gap: 10px; }
.category { color: var(--blue); font-size: .78rem; font-weight: 900; text-transform: uppercase; letter-spacing: .12em; }
.item-bottom, .summary-line, .order-top { display: flex; justify-content: space-between; align-items: center; gap: 14px; }
.item-bottom strong, .summary-line strong { font-size: 1.2rem; color: var(--blue); }
.cart-layout { display: grid; grid-template-columns: 1fr 330px; gap: 22px; align-items: start; }
.cart-list { display: grid; gap: 14px; }
.cart-row { padding: 16px; display: grid; grid-template-columns: auto 1fr auto auto auto; align-items: center; gap: 16px; }
.mini-icon { width: 48px; height: 48px; display: grid; place-items: center; border-radius: 14px; background: rgba(34,211,238,.14); color: var(--blue); font-size: 1.5rem; }
.summary-card { padding: 22px; position: sticky; top: 105px; display: grid; gap: 14px; }
.orders-list { display: grid; gap: 16px; }
.order-card ul { color: var(--muted); }
.center { text-align: center; }
.toast { position: fixed; right: 20px; bottom: 20px; z-index: 50; max-width: 360px; padding: 14px 16px; border-radius: 16px; border: 1px solid var(--border); background: var(--panel-strong); box-shadow: var(--shadow); }
.toast-ok { border-color: rgba(52, 211, 153, .4); }
.toast-error { border-color: rgba(251, 113, 133, .5); }

@media (max-width: 860px) {
  .navbar, .section-head { align-items: flex-start; }
  .navbar { flex-direction: column; }
  .nav-user { justify-content: flex-start; }
  .feature-grid, .shop-grid, .cart-layout { grid-template-columns: 1fr; }
  .cart-row { grid-template-columns: auto 1fr; }
  .summary-card { position: static; }
}