:root {
    --primary: #4F46E5;
    --primary-dark: #4338CA;
    --bg: #f8fafc;
    --card-bg: #fff;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --danger: #ef4444;
    --success: #22c55e;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.15);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: system-ui, -apple-system, sans-serif; background: var(--bg); color: var(--text); line-height: 1.6; }
a { color: var(--primary); text-decoration: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Кнопки */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 22px; border: none; border-radius: 8px; font-size: 15px; font-weight: 600; cursor: pointer; transition: 0.2s; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline { background: transparent; border: 2px solid var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-sm { padding: 6px 14px; font-size: 13px; }

/* Шапка сайта */
.site-header { background: var(--card-bg); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; }
.site-header .container { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { font-size: 20px; font-weight: 800; color: var(--text); }
.logo span { color: var(--primary); }
.nav-links { display: flex; gap: 24px; align-items: center; }
.nav-links a { color: var(--text-muted); font-weight: 500; }
.nav-links a:hover { color: var(--primary); }
.lang-switcher { display: flex; gap: 6px; }
.lang-switcher a { font-size: 13px; padding: 4px 10px; border-radius: 6px; border: 1px solid var(--border); }
.lang-switcher a.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* Алерты */
.alert { padding: 12px 18px; border-radius: 8px; margin-bottom: 20px; font-size: 14px; }
.alert-error { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.alert-success { background: #f0fdf4; color: #166534; border: 1px solid #bbf7d0; }
.alert-info { background: #eff6ff; color: #1e40af; border: 1px solid #bfdbfe; }

/* Формы */
.form-card { max-width: 420px; margin: 60px auto; background: var(--card-bg); border-radius: var(--radius); box-shadow: var(--shadow); padding: 36px; }
.form-card h1 { font-size: 24px; margin-bottom: 8px; }
.form-card .subtitle { color: var(--text-muted); margin-bottom: 24px; font-size: 15px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-weight: 500; margin-bottom: 6px; font-size: 14px; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 10px 14px; border: 1px solid var(--border); border-radius: 8px; font-size: 15px; font-family: inherit;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: 2px solid var(--primary); border-color: var(--primary); }
.form-group textarea { resize: vertical; min-height: 70px; }
.form-card .btn { width: 100%; justify-content: center; margin-top: 6px; }
.form-footer { text-align: center; margin-top: 18px; color: var(--text-muted); font-size: 14px; }

/* Футер */
.site-footer { border-top: 1px solid var(--border); padding: 30px 0; text-align: center; color: var(--text-muted); font-size: 14px; margin-top: 60px; }