:root {
  --et-bg: #0f1419;
  --et-bg-elevated: #1a222c;
  --et-border: #2a3544;
  --et-text: #f0f3f6;
  --et-muted: #8b9aab;
  --et-accent: #3d8bfd;
  --et-accent-soft: #1e3a5f;
  --et-success: #3d9a6a;
  --et-warning: #d4a017;
  --et-danger: #d64545;
  --et-font-display: "DM Sans", system-ui, sans-serif;
  --et-font-body: "Source Sans 3", system-ui, sans-serif;
  --et-radius: 12px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--et-accent-soft), transparent),
    var(--et-bg);
  color: var(--et-text);
  font-family: var(--et-font-body);
  -webkit-font-smoothing: antialiased;
}

.et-display {
  font-family: var(--et-font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.et-nav {
  border-bottom: 1px solid var(--et-border);
  background: color-mix(in srgb, var(--et-bg) 90%, transparent);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 40;
  padding: 1rem 1.5rem;
}

.et-nav-inner {
  max-width: 64rem;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.et-brand {
  font-family: var(--et-font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--et-text);
  text-decoration: none;
}

.et-link {
  color: var(--et-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.et-link:hover { color: var(--et-text); }

.et-main {
  max-width: 64rem;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

.et-card {
  background: var(--et-bg-elevated);
  border: 1px solid var(--et-border);
  border-radius: var(--et-radius);
  padding: 1.5rem;
}

.et-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border: none;
  border-radius: 8px;
  padding: 0.85rem 1.25rem;
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  cursor: pointer;
  text-decoration: none;
  color: #fff;
  background: var(--et-accent);
  transition: opacity 0.15s ease;
}
.et-btn:hover { opacity: 0.9; }
.et-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.et-btn-ghost {
  background: transparent;
  border: 1px solid var(--et-border);
  color: var(--et-text);
}

.et-input {
  width: 100%;
  background: #0a0e12;
  border: 1px solid var(--et-border);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  color: var(--et-text);
  font-size: 0.9rem;
}
.et-input:focus {
  outline: none;
  border-color: var(--et-accent);
}

.et-muted { color: var(--et-muted); }
.et-success { color: var(--et-success); }
.et-danger { color: var(--et-danger); }
.et-accent { color: var(--et-accent); }

.hidden { display: none !important; }

.et-grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
@media (min-width: 900px) {
  .et-grid-2 { grid-template-columns: 1fr 1fr; }
}

.et-product {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--et-border);
}
.et-product:last-child { border-bottom: none; }

.et-badge {
  display: inline-block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  background: var(--et-accent-soft);
  color: var(--et-accent);
  margin-bottom: 0.35rem;
}

.qr-box canvas, .qr-box img { border-radius: 8px; }