:root {
    --sky-50:  #f0f9ff;
    --sky-100: #e0f2fe;
    --sky-200: #bae6fd;
    --sky-300: #7dd3fc;
    --sky-400: #38bdf8;
    --sky-500: #0ea5e9;
    --sky-600: #0284c7;
    --sky-700: #0369a1;
    --sky-800: #075985;
    --sky-900: #0c4a6e;
    --white:   #ffffff;
    --gray-50: #f9fafb;
    --gray-600:#4b5563;
    --shadow:  0 8px 30px rgba(14, 165, 233, 0.15);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
    --radius:  16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html {
    scroll-behavior: smooth;
    scroll-padding-top: 120px;
}

body {
    font-family: 'Vazirmatn', system-ui, -apple-system, sans-serif;
    background-color: var(--sky-50);
    color: var(--sky-900);
    line-height: 1.8;
    overflow-x: hidden;
}

/* ────────────── هدر ────────────── */
header {
    background: linear-gradient(135deg, var(--sky-100), var(--white));
    padding: 1.2rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 3px solid var(--sky-300);
}

.logo {
    width: 60px; height: 60px;
    background: var(--sky-500);
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    box-shadow: var(--shadow-sm);
}
.logo svg { width: 36px; height: 36px; fill: var(--white); }

.brand-center { text-align: center; flex: 1; }
.brand-center h1 { font-size: 1.8rem; color: var(--sky-800); font-weight: 800; }
.brand-center .slogan { font-size: 0.95rem; color: var(--sky-600); margin-top: 4px; font-weight: 500; }

.support-box {
    display: flex; align-items: center; gap: 10px;
    background: var(--white); padding: 8px 16px; border-radius: 50px;
    box-shadow: var(--shadow-sm); border: 1px solid var(--sky-200);
}
.support-box svg { width: 22px; height: 22px; fill: var(--sky-500); }
.support-box span { font-weight: 700; color: var(--sky-700); font-size: 0.95rem; }

/* ────────────── منوی اصلی ────────────── */
nav {
    background: var(--sky-700);
    position: sticky; top: 0; z-index: 1000;
    box-shadow: 0 4px 12px rgba(3, 105, 161, 0.2);
}
nav ul {
    list-style: none; display: flex; justify-content: center;
    flex-wrap: wrap; padding: 0.6rem 0; max-width: 1400px; margin: 0 auto;
}
nav a {
    text-decoration: none; color: var(--sky-100);
    padding: 10px 24px; border-radius: 12px;
    border: 2px solid transparent;
    transition: var(--transition);
    font-weight: 600; font-size: 0.95rem; margin: 0 4px; display: inline-block;
}
nav a:hover {
    border-color: var(--sky-300);
    border-radius: 50px;
    background: rgba(255, 255, 255, 0.15);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(125, 211, 252, 0.3);
}

/* ────────────── اسلایدر اصلی ────────────── */
.hero-slider {
    width: 100%; height: 550px; position: relative;
    overflow: hidden; background: var(--sky-900);
}
.slide {
    position: absolute; inset: 0; background-size: cover; background-position: center;
    opacity: 0; transition: opacity 1.2s ease-in-out;
}
.slide.active { opacity: 1; }
.slide-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(to bottom, rgba(14,165,233,0.3), rgba(12,74,110,0.7));
    display: flex; align-items: center; justify-content: center;
}
.slide-text {
    color: white; font-size: 2.5rem; font-weight: 800;
    text-shadow: 0 4px 12px rgba(0,0,0,0.3); text-align: center; padding: 0 20px;
}

/* ────────────── استایل مشترک بخش‌ها ────────────── */
.section-container { max-width: 1200px; margin: 0 auto; padding: 4rem 5%; }
section {
    background: var(--white); margin: 2rem auto; border-radius: var(--radius);
    box-shadow: var(--shadow); padding: 3rem 5%;
}
section h2 {
    font-size: 2rem; color: var(--sky-800); margin-bottom: 1.5rem;
    position: relative; padding-bottom: 0.8rem; display: inline-block;
}
section h2::after {
    content: ''; position: absolute; bottom: 0; right: 0; width: 60%; height: 4px;
    background: linear-gradient(to left, var(--sky-400), transparent); border-radius: 4px;
}

/* ────────────── بخش محصولات (۸ تایل) ────────────── */
.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
}
.product-tile {
    position: relative; border-radius: 16px; overflow: hidden;
    aspect-ratio: 4/3; cursor: pointer;
    box-shadow: var(--shadow-sm); border: 2px solid var(--sky-200);
    transition: var(--transition); background: var(--white);
}
.product-tile:hover {
    border-color: var(--sky-500); transform: translateY(-4px); box-shadow: var(--shadow);
}
.product-tile img {
    width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease;
}
.product-tile:hover img { transform: scale(1.08); }

.product-overlay {
    position: absolute; bottom: 0; left: 0; right: 0;
    background: linear-gradient(to top, rgba(12, 74, 110, 0.9), transparent);
    padding: 1.2rem 1rem 0.8rem; color: white;
    transform: translateY(100%); transition: var(--transition);
}
.product-tile:hover .product-overlay { transform: translateY(0); }
.product-overlay h4 { font-size: 1.1rem; margin-bottom: 4px; }
.product-overlay p { font-size: 0.85rem; opacity: 0.9; }

/* ────────────── بخش خدمات پس از فروش ────────────── */
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; margin-top: 2rem; }
.card {
    background: var(--sky-50); padding: 1.5rem; border-radius: 12px;
    border: 1px solid var(--sky-200); transition: var(--transition);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-sm); }
.card h3 { color: var(--sky-700); margin-bottom: 0.5rem; }

/* ────────────── اسلایدر برندها ────────────── */
#brands { background: var(--sky-100); padding: 3rem 0; overflow: hidden; margin: 2rem auto; border-radius: 0; box-shadow: none; }
#brands h2 { margin: 0 5% 2rem; }
.brands-track {
    display: flex; gap: 3rem; width: max-content;
    animation: scroll-brands 25s linear infinite; padding: 0 5%;
}
.brand-item {
    width: 120px; height: 120px; background: var(--white); border-radius: 16px;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    box-shadow: var(--shadow-sm); border: 1px solid var(--sky-200); flex-shrink: 0;
    transition: var(--transition);
}
.brand-item:hover { transform: scale(1.05); border-color: var(--sky-400); }
.brand-icon { font-size: 2rem; margin-bottom: 0.5rem; color: var(--sky-600); }
.brand-name { font-size: 0.85rem; font-weight: 600; color: var(--sky-700); }
@keyframes scroll-brands { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* ────────────── فوتر ────────────── */
footer { background: var(--sky-900); color: var(--sky-100); padding: 4rem 5% 2rem; }
.footer-grid {
    max-width: 1200px; margin: 0 auto; display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 3rem; text-align: right;
}
footer h3 { color: var(--sky-300); margin-bottom: 1.2rem; font-size: 1.3rem; }
footer p, footer li { margin-bottom: 0.8rem; color: var(--sky-200); }
footer a { color: var(--sky-200); text-decoration: none; transition: 0.3s; }
footer a:hover { color: var(--white); }
.socials { display: flex; gap: 1rem; margin-top: 1rem; }
.socials a {
    width: 42px; height: 42px; background: rgba(255,255,255,0.1); border-radius: 50%;
    display: flex; align-items: center; justify-content: center; transition: var(--transition);
}
.socials a:hover { background: var(--sky-500); transform: translateY(-3px); }
.socials svg { width: 20px; height: 20px; fill: var(--white); }
.copyright {
    text-align: center; margin-top: 3rem; padding-top: 1.5rem;
    border-top: 1px solid rgba(255,255,255,0.1); font-size: 0.85rem; color: var(--sky-300);
}

/* ────────────── ریسپانسیو ────────────── */
@media (max-width: 1024px) { .products-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 768px) {
    header { flex-direction: column; gap: 1rem; text-align: center; }
    .brand-center h1 { font-size: 1.4rem; }
    nav ul { justify-content: center; gap: 0.5rem; }
    nav a { padding: 8px 16px; font-size: 0.85rem; }
    .hero-slider { height: 350px; }
    .slide-text { font-size: 1.6rem; }
    .products-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { text-align: center; }
    .socials { justify-content: center; }
}
@media (max-width: 480px) { .products-grid { grid-template-columns: 1fr; } }