:root {
    --bg: #f6f7fb;
    --fg: #1f2937;
    --muted: #6b7280;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --border: #e5e7eb;
    --danger: #b91c1c;
    --danger-bg: #fee2e2;
    --card: #ffffff;
}

* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
       background: var(--bg); color: var(--fg); line-height: 1.5; }
.container { max-width: 960px; margin: 0 auto; padding: 0 20px; }
.topbar { background: #fff; border-bottom: 1px solid var(--border); padding: 14px 0; }
.topbar .container { display: flex; justify-content: space-between; align-items: center; }
.brand { font-weight: 700; text-decoration: none; color: var(--fg); }
.topbar nav a { color: var(--primary); text-decoration: none; }
.footer { margin-top: 60px; padding: 20px 0; border-top: 1px solid var(--border); background: #fff; }
.muted { color: var(--muted); }

h1 { margin-top: 28px; }

.cards { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); margin-top: 20px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 18px; }
.card h2 { margin: 0 0 6px; font-size: 1.15rem; }

.btn { display: inline-block; padding: 9px 16px; border-radius: 6px; background: #fff;
       border: 1px solid var(--border); color: var(--fg); text-decoration: none; cursor: pointer; font-size: 1rem; }
.btn:hover { background: #f3f4f6; }
.btn.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn.primary:hover { background: var(--primary-hover); }

.back { display: inline-block; margin-top: 14px; color: var(--primary); text-decoration: none; }

.form { background: #fff; border: 1px solid var(--border); border-radius: 10px; padding: 22px; margin-top: 16px; }
.form fieldset { border: none; padding: 0; margin: 0 0 18px; }
.form legend { font-weight: 600; margin-bottom: 10px; }
.form label { display: block; margin-bottom: 12px; font-size: 0.95rem; }
.form input[type=text], .form input[type=email], .form input[type=tel],
.form input[type=number], .form textarea, .form input[type=file] {
    display: block; width: 100%; padding: 9px 12px; margin-top: 4px;
    border: 1px solid var(--border); border-radius: 6px; font-size: 1rem; background: #fff;
}
.form input:focus, .form textarea:focus { outline: 2px solid var(--primary); border-color: var(--primary); }
.form .checkbox { display: flex; gap: 10px; align-items: flex-start; }
.form .checkbox input { margin-top: 4px; }

.alert { padding: 12px 14px; border-radius: 6px; margin-top: 14px; }
.alert.error { background: var(--danger-bg); color: var(--danger); }