:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --text: #1c1e21;
  --muted: #6b7280;
  --border: #e5e7eb;
  --primary: #111827;
  --accent: #2563eb;
  --success: #15803d;
  --success-bg: #dcfce7;
  --error: #b91c1c;
  --error-bg: #fee2e2;
  --warning: #92400e;
  --warning-bg: #fef3c7;
  --coin: #b45309;
  --coin-bg: #fef3c7;
  --radius: 10px;
}

* { box-sizing: border-box; }

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

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  background: var(--primary);
  color: #fff;
  padding: 14px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.topbar a { color: #fff; opacity: .85; }
.topbar a:hover { opacity: 1; }

.topbar-brand { font-weight: 700; letter-spacing: .02em; }

.topbar-nav { display: flex; gap: 18px; align-items: center; }

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 28px 20px 60px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 20px;
}

h1 { font-size: 1.5rem; margin: 0 0 18px; }
h2 { font-size: 1.15rem; margin: 0 0 14px; }

.stats-row { display: flex; gap: 16px; flex-wrap: wrap; }
.stat-box {
  flex: 1;
  min-width: 160px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
}
.stat-box .value { font-size: 1.8rem; font-weight: 700; }
.stat-box .label { color: var(--muted); font-size: .85rem; }

.coin-box {
  background: var(--coin-bg);
  color: var(--coin);
  border-radius: var(--radius);
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}
.coin-box .value { font-size: 2rem; font-weight: 800; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border); font-size: .92rem; }
th { color: var(--muted); font-weight: 600; font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; }

.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: .78rem;
  font-weight: 600;
}
.badge-green { background: var(--success-bg); color: var(--success); }
.badge-gray { background: #f1f5f9; color: #475569; }
.badge-amber { background: var(--warning-bg); color: var(--warning); }
.badge-red { background: var(--error-bg); color: var(--error); }

form .field { margin-bottom: 14px; }
label { display: block; font-size: .85rem; font-weight: 600; margin-bottom: 5px; color: #374151; }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=url],
input[type=date], textarea, select {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: .95rem;
  font-family: inherit;
}
textarea { min-height: 90px; resize: vertical; }

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 9px 16px;
  border-radius: 8px;
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover { background: #1d4ed8; text-decoration: none; }
.btn-secondary { background: #fff; color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: #f9fafb; }
.btn-danger { background: #fff; color: var(--error); border: 1px solid #fecaca; }
.btn-danger:hover { background: var(--error-bg); }
.btn-sm { padding: 5px 10px; font-size: .8rem; }

.row-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
.form-grid .field-full { grid-column: 1 / -1; }

.flash-list { margin-bottom: 18px; }
.flash {
  padding: 10px 14px;
  border-radius: 8px;
  margin-bottom: 8px;
  font-size: .9rem;
}
.flash-success { background: var(--success-bg); color: var(--success); }
.flash-error { background: var(--error-bg); color: var(--error); }
.flash-warning { background: var(--warning-bg); color: var(--warning); }

.muted { color: var(--muted); font-size: .85rem; }
.empty-state { color: var(--muted); padding: 30px 0; text-align: center; }

.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-card { width: 100%; max-width: 380px; }

.thumb {
  width: 44px; height: 44px; object-fit: cover; border-radius: 6px; border: 1px solid var(--border);
  vertical-align: middle;
}

.inline-form { display: inline; }

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}
.product-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.product-card-img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  background: var(--bg);
}
.product-card-body { padding: 16px; }
.product-card-body h3 { font-size: 1rem; margin: 0 0 6px; }

@media (max-width: 640px) {
  .form-grid { grid-template-columns: 1fr; }
  .container { padding: 18px 14px 50px; }
}