:root {
    --color-primary: #0056b3;
    --color-accent: #ff6b00;
    --color-text: #1a1a1a;
    --color-bg: #ffffff;
    --color-bg-alt: #f8f9fa;
    --color-border: #e5e7eb;
    --radius: 8px;
    --shadow: 0 4px 12px rgba(0,0,0,0.08);
    --font-main: system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--font-main); color: var(--color-text); line-height: 1.6; background: var(--color-bg); }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* Header */
.header { border-bottom: 1px solid var(--color-border); padding: 15px 0; position: sticky; top: 0; background: #fff; z-index: 100; }
.header__inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 15px; }
.logo { font-weight: 800; font-size: 1.25rem; color: var(--color-primary); }
.nav__list { display: flex; gap: 20px; }
.header__actions { display: flex; align-items: center; gap: 15px; }
.burger { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; }

/* Buttons */
.btn { display: inline-block; padding: 10px 20px; border-radius: var(--radius); font-weight: 600; text-align: center; cursor: pointer; border: none; }
.btn--primary { background: var(--color-primary); color: #fff; }
.btn--outline { border: 2px solid var(--color-primary); color: var(--color-primary); }
.btn--lg { padding: 14px 28px; font-size: 1.1rem; }
.btn-link { color: var(--color-primary); font-weight: 600; margin-top: 10px; display: inline-block; }

/* Sections */
section { padding: 60px 0; }
.hero__inner, .models-grid, .cards-grid, .catalog-grid, .reviews-grid, .why-grid, .footer__inner, .contacts__grid { display: grid; gap: 30px; }
.hero__inner { grid-template-columns: 1fr 1fr; align-items: center; }
.models-grid, .cards-grid { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.catalog-grid { grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }
.reviews-grid, .why-grid { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.contacts__grid { grid-template-columns: 1fr 1fr; gap: 40px; }

/* Cards & Items */
.card, .model-card, .cat-item, .review, .why-card { background: var(--color-bg-alt); padding: 25px; border-radius: var(--radius); box-shadow: var(--shadow); }
.card h3, .model-card h3, .cat-item h4, .review p { margin-bottom: 12px; }
.badge { background: #e0f2fe; color: #0369a1; padding: 4px 8px; border-radius: 4px; font-size: 0.8rem; font-weight: 600; display: inline-block; margin-bottom: 10px; }
.badge--accent { background: #fff7ed; color: #c2410c; }

/* Steps */
.steps { display: flex; flex-wrap: wrap; gap: 20px; margin-top: 30px; }
.step { flex: 1 1 220px; background: var(--color-bg-alt); padding: 20px; border-radius: var(--radius); }
.step__num { display: flex; align-items: center; justify-content: center; width: 36px; height: 36px; background: var(--color-primary); color: #fff; border-radius: 50%; font-weight: bold; margin-bottom: 10px; }

/* Form */
.contact-form { display: flex; flex-direction: column; gap: 12px; }
.contact-form input, .contact-form textarea { padding: 10px; border: 1px solid var(--color-border); border-radius: var(--radius); font-family: inherit; }
.contact-form button { margin-top: 10px; }

/* Footer */
.footer { background: #111827; color: #f9fafb; padding: 40px 0 20px; margin-top: 40px; }
.footer__inner { display: grid; grid-template-columns: 1.5fr 2fr; gap: 40px; }
.footer__nav { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.footer__nav h4 { margin-bottom: 10px; color: #9ca3af; }
.footer__nav a { color: #d1d5db; }
.footer__bottom { border-top: 1px solid #374151; padding-top: 20px; margin-top: 30px; text-align: center; font-size: 0.9rem; color: #9ca3af; }
.footer__legal { display: flex; justify-content: center; gap: 15px; flex-wrap: wrap; margin-top: 10px; }

/* Responsive */
@media (max-width: 768px) {
    .nav { display: none; width: 100%; padding-top: 15px; }
    .nav.active { display: block; }
    .nav__list { flex-direction: column; }
    .burger { display: block; }
    .hero__inner, .contacts__grid, .footer__inner { grid-template-columns: 1fr; }
    .footer__nav { grid-template-columns: 1fr; }
}