:root {
  --bg: #ffffff;
  --fg: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --card: #ffffff;
  --btn: #0f172a;
  --btn-fg: #ffffff;
  --radius: 14px;
  --shadow: 0 8px 30px rgba(2,6,23,.08);
  --container: 1100px;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.5;
}
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 16px; }

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-row { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 12px; }
.logo { font-weight: 700; letter-spacing: 0.3px; }
.nav { display: flex; gap: 14px; align-items: center; }
.nav a { padding: 8px 10px; border-radius: 10px; }
.nav a:hover { background: #f8fafc; text-decoration: none; }
.admin-link { border: 1px solid var(--border); }

.nav-toggle {
  display: none;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 10px;
  padding: 8px 10px;
  cursor: pointer;
}

.site-main { min-height: calc(100vh - 140px); }

.hero { padding: 56px 0 28px; border-bottom: 1px solid var(--border); }
.hero h1 { margin: 0 0 10px; font-size: 34px; }
.hero-actions { display: flex; gap: 12px; margin-top: 16px; flex-wrap: wrap; }

.section { padding: 28px 0; }
h1 { font-size: 28px; margin: 0 0 12px; }
h2 { font-size: 20px; margin: 0 0 12px; }
.muted { color: var(--muted); }

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 14px;
}
.card {
  display: block;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow);
  padding: 14px;
  text-decoration: none;
}
.card:hover { text-decoration: none; border-color: #cbd5e1; }
.card-title { font-weight: 650; margin-bottom: 6px; }
.card-text { color: var(--muted); font-size: 14px; }
.thumb { width: 100%; height: 170px; object-fit: cover; border-radius: 12px; border: 1px solid var(--border); margin-bottom: 10px; background: #f1f5f9; }

.btn {
  display: inline-block;
  background: var(--btn);
  color: var(--btn-fg);
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid var(--btn);
  text-decoration: none;
  cursor: pointer;
  font-weight: 600;
}
.btn:hover { text-decoration: none; opacity: .95; }
.btn-ghost { background: transparent; color: var(--fg); border: 1px solid var(--border); }
.btn-sm { padding: 7px 10px; border-radius: 10px; }

.breadcrumbs { color: var(--muted); font-size: 14px; margin-bottom: 10px; }
.breadcrumbs a { color: var(--muted); }

.product { display: grid; grid-template-columns: 1fr 1.3fr; gap: 18px; margin-top: 14px; }
.product-img { width: 100%; border-radius: var(--radius); border: 1px solid var(--border); background: #f1f5f9; }
.placeholder {
  height: 320px; border-radius: var(--radius);
  border: 1px dashed var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--muted);
  background: #fafafa;
}
.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; }

.content p { margin: 0 0 10px; }
.content ul { margin: 0 0 10px 18px; }

.site-footer { border-top: 1px solid var(--border); padding: 18px 0; }
.footer-row { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

.form { display: grid; gap: 12px; max-width: 720px; }
label { display: grid; gap: 6px; font-weight: 600; }
input, textarea, select {
  font: inherit;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #fff;
}

.alert { padding: 10px 12px; border-radius: 12px; border: 1px solid var(--border); margin: 12px 0; }
.alert-danger { border-color: #fecaca; background: #fff1f2; }
.alert-ok { border-color: #bbf7d0; background: #f0fdf4; }

.table { width: 100%; border-collapse: collapse; margin-top: 12px; }
.table th, .table td { border-bottom: 1px solid var(--border); padding: 10px 8px; text-align: left; vertical-align: top; }
.row-actions { display: flex; gap: 8px; align-items: center; }
.row-actions form { margin: 0; }

.admin-top { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; }

@media (max-width: 900px) {
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .product { grid-template-columns: 1fr; }
  .thumb { height: 160px; }
}

@media (max-width: 680px) {
  .nav-toggle { display: inline-flex; }
  .nav {
    display: none;
    position: absolute;
    right: 16px;
    top: 64px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: var(--shadow);
    padding: 10px;
    flex-direction: column;
    align-items: stretch;
    min-width: 220px;
  }
  .nav a { padding: 10px 12px; }
  .nav[data-open="1"] { display: flex; }
  .hero { padding: 42px 0 22px; }
  .hero h1 { font-size: 30px; }
  .grid { grid-template-columns: 1fr; }
}