:root {
  --color-primary: #4f46e5;
  --color-primary-dark: #4338ca;
  --color-success: #16a34a;
  --color-danger: #dc2626;
  --color-warning: #d97706;
  --color-bg: #f6f7fb;
  --color-surface: #ffffff;
  --color-border: #e5e7eb;
  --color-text: #1f2937;
  --color-text-muted: #6b7280;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  font-size: 16px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Header ---------- */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 20;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  padding: 14px 20px;
  gap: 10px;
}
.brand {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}
.brand-mark { color: var(--color-primary); }
.main-nav { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.main-nav a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-weight: 600;
  font-size: 0.92rem;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
}
.main-nav a.active, .main-nav a:hover { color: var(--color-primary); border-bottom-color: var(--color-primary); }
.cart-link { display: flex; align-items: center; gap: 6px; }
.badge {
  background: var(--color-primary);
  color: #fff;
  border-radius: 999px;
  font-size: 0.72rem;
  padding: 1px 8px;
  font-weight: 700;
}

/* ---------- Layout ---------- */
.page-main { padding: 28px 20px 60px; }
.page-header { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; margin-bottom: 20px; }
.page-header h1 { margin: 0; font-size: 1.6rem; }
.page-header p.subtitle { color: var(--color-text-muted); margin: 4px 0 0; }

/* ---------- Cards / Surfaces ---------- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
}
.card + .card { margin-top: 16px; }
.section-title { font-size: 1rem; font-weight: 700; margin: 0 0 14px; }

/* ---------- Currency Selector ---------- */
.currency-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.currency-bar select { padding: 8px 10px; border-radius: 8px; border: 1px solid var(--color-border); background: #fff; font-weight: 600; }

/* ---------- Product Grid ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 18px;
}
.product-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
}
.product-card img { width: 100%; height: 150px; object-fit: cover; background: #eee; }
.product-body { padding: 14px 16px 16px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.product-body h3 { margin: 0; font-size: 1rem; }
.product-body p.desc { color: var(--color-text-muted); font-size: 0.85rem; margin: 0; flex: 1; }
.product-price { font-weight: 700; font-size: 1.05rem; }
.tag {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  background: #eef2ff;
  color: var(--color-primary);
  padding: 2px 8px;
  border-radius: 999px;
  width: fit-content;
}

/* ---------- Buttons / Forms ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: none;
  border-radius: 8px;
  padding: 10px 16px;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  text-decoration: none;
  background: var(--color-primary);
  color: #fff;
  transition: background 0.15s ease;
}
.btn:hover { background: var(--color-primary-dark); }
.btn.btn-block { width: 100%; }
.btn.btn-secondary { background: #fff; color: var(--color-text); border: 1px solid var(--color-border); }
.btn.btn-secondary:hover { background: #f3f4f6; }
.btn.btn-danger { background: var(--color-danger); }
.btn.btn-sm { padding: 6px 10px; font-size: 0.8rem; }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }

label { display: block; font-weight: 600; font-size: 0.85rem; margin-bottom: 4px; }
input[type="text"], input[type="email"], input[type="tel"], input[type="number"],
input[type="password"], select, textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  font-size: 0.92rem;
  background: #fff;
  color: var(--color-text);
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--color-primary); outline-offset: 1px; }
.form-row { margin-bottom: 14px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 640px) { .form-grid { grid-template-columns: 1fr; } }
.help-text { color: var(--color-text-muted); font-size: 0.78rem; margin-top: 4px; }
fieldset { border: 1px solid var(--color-border); border-radius: 8px; padding: 14px; margin: 0 0 16px; }
legend { font-weight: 700; font-size: 0.85rem; padding: 0 6px; }
.radio-group, .checkbox-group { display: flex; flex-direction: column; gap: 8px; }
.radio-option, .checkbox-option {
  display: flex; align-items: flex-start; gap: 8px;
  border: 1px solid var(--color-border); border-radius: 8px; padding: 10px 12px;
  cursor: pointer;
}
.radio-option:has(input:checked), .checkbox-option:has(input:checked) {
  border-color: var(--color-primary); background: #eef2ff;
}
.radio-option input, .checkbox-option input { margin-top: 3px; }
.radio-option .opt-title { font-weight: 700; font-size: 0.9rem; }
.radio-option .opt-desc { font-size: 0.78rem; color: var(--color-text-muted); }

/* ---------- Table ---------- */
table.data-table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
table.data-table th, table.data-table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--color-border); }
table.data-table th { color: var(--color-text-muted); font-weight: 600; font-size: 0.78rem; text-transform: uppercase; }
@media (max-width: 700px) {
  table.data-table thead { display: none; }
  table.data-table, table.data-table tbody, table.data-table tr, table.data-table td { display: block; width: 100%; }
  table.data-table tr { border: 1px solid var(--color-border); border-radius: 8px; margin-bottom: 10px; padding: 6px 4px; }
  table.data-table td { border: none; padding: 6px 12px; }
  table.data-table td::before { content: attr(data-label); font-weight: 700; display: block; font-size: 0.72rem; color: var(--color-text-muted); text-transform: uppercase; }
}

/* ---------- Status badges ---------- */
.status { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 0.75rem; font-weight: 700; }
.status-success, .status-PROCESSED, .status-CREATED, .status-ACTIVE { background: #dcfce7; color: var(--color-success); }
.status-FAILED, .status-CANCELLED { background: #fee2e2; color: var(--color-danger); }
.status-PENDING, .status-ATTEMPTED { background: #fef3c7; color: var(--color-warning); }

/* ---------- Code / JSON viewer ---------- */
pre.json-view {
  background: #0f172a;
  color: #e2e8f0;
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  font-size: 0.8rem;
  line-height: 1.55;
  max-height: 420px;
  overflow-y: auto;
}
.json-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 800px) { .json-columns { grid-template-columns: 1fr; } }
.json-col h4 { margin: 0 0 8px; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--color-text-muted); }

/* ---------- Steps / Mode picker ---------- */
.mode-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 700px) { .mode-grid { grid-template-columns: 1fr; } }
.mode-card {
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow); text-decoration: none; color: var(--color-text);
  display: flex; flex-direction: column; gap: 10px; transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.mode-card:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(0,0,0,0.08); }
.mode-icon { font-size: 1.8rem; }
.mode-card h2 { margin: 0; font-size: 1.15rem; }
.mode-card p { margin: 0; color: var(--color-text-muted); font-size: 0.9rem; }

/* ---------- Cart page ---------- */
.cart-row { display: flex; align-items: center; gap: 14px; padding: 12px 0; border-bottom: 1px solid var(--color-border); }
.cart-row img { width: 64px; height: 64px; object-fit: cover; border-radius: 8px; background: #eee; }
.cart-row .info { flex: 1; }
.cart-row .qty-input { width: 64px; }
.cart-summary-line { display: flex; justify-content: space-between; padding: 6px 0; font-size: 0.92rem; }
.cart-summary-line.total { font-weight: 800; font-size: 1.1rem; border-top: 1px solid var(--color-border); margin-top: 8px; padding-top: 12px; }

/* ---------- Alerts ---------- */
.alert { padding: 12px 16px; border-radius: 8px; font-size: 0.88rem; margin-bottom: 16px; }
.alert-success { background: #dcfce7; color: #14532d; }
.alert-danger { background: #fee2e2; color: #7f1d1d; }
.alert-info { background: #e0e7ff; color: #312e81; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--color-border); padding: 18px 0; margin-top: 40px; }
.site-footer p { color: var(--color-text-muted); font-size: 0.8rem; text-align: center; margin: 0; }

/* ---------- Utility ---------- */
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.justify-between { justify-content: space-between; }
.items-center { align-items: center; }
.mt-16 { margin-top: 16px; }
.mb-16 { margin-bottom: 16px; }
.text-muted { color: var(--color-text-muted); }
.text-sm { font-size: 0.85rem; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 700px) { .grid-2 { grid-template-columns: 1fr; } }