/* ===== Reset & Base ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --color-bg: #0a0e14;
    --color-surface: #121821;
    --color-surface-2: #1a2330;
    --color-primary: #00b4d8;
    --color-primary-dark: #0090b5;
    --color-accent: #2ec4b6;
    --color-text: #e6edf3;
    --color-text-muted: #8b9bb0;
    --color-border: #2a3744;
    --color-white: #ffffff;
    --radius: 12px;
    --max-width: 1200px;
    --font: 'Vazirmatn', 'Segoe UI', Tahoma, sans-serif;
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.8;
    font-size: 16px;
    overflow-x: hidden;
}

a { color: var(--color-primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--color-accent); }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* ===== Header ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 14, 20, .92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--color-white);
    letter-spacing: -1px;
}

.nav-brand span { color: var(--color-primary); }
.brand-logo { display: block; width: auto; height: 42px; max-width: 180px; object-fit: contain; }
.footer-logo { height: 48px; margin-bottom: 12px; }

.nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
    list-style: none;
}

.nav-links a {
    color: var(--color-text-muted);
    font-size: .95rem;
    font-weight: 500;
    transition: color .2s;
}

.nav-links a:hover, .nav-links a.active { color: var(--color-white); }

.nav-cta {
    background: var(--color-primary);
    color: var(--color-bg) !important;
    padding: 8px 22px;
    border-radius: 50px;
    font-weight: 700;
    font-size: .9rem;
    transition: background .2s, transform .2s;
}

.nav-cta:hover { background: var(--color-accent); transform: translateY(-1px); }

.nav-toggle { display: none; font-size: 1.5rem; background: none; border: none; color: var(--color-white); cursor: pointer; }

/* ===== Hero ===== */
.hero {
    position: relative;
    padding: 100px 0 80px;
    text-align: center;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0,180,216,.12) 0%, transparent 70%);
    pointer-events: none;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 20px;
    color: var(--color-white);
}

.hero h1 .highlight { color: var(--color-primary); }

.hero p {
    font-size: 1.2rem;
    color: var(--color-text-muted);
    max-width: 700px;
    margin: 0 auto 36px;
}

.hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.btn {
    display: inline-block;
    padding: 14px 36px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1rem;
    transition: all .25s;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-bg);
}

.btn-primary:hover { background: var(--color-accent); color: var(--color-bg); transform: translateY(-2px); }

.btn-outline {
    background: transparent;
    color: var(--color-text);
    border: 1.5px solid var(--color-border);
}

.btn-outline:hover { border-color: var(--color-primary); color: var(--color-primary); }

/* ===== Sections ===== */
.section { padding: 80px 0; }

.section-title {
    text-align: center;
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--color-white);
    margin-bottom: 16px;
}

.section-desc {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 1.1rem;
    max-width: 650px;
    margin: 0 auto 50px;
}

/* ===== Cards Grid ===== */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 28px;
}

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 32px;
    transition: border-color .25s, transform .25s;
}

.card:hover { border-color: var(--color-primary); transform: translateY(-4px); }

.card-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    background: rgba(0,180,216,.1);
    border-radius: 14px;
    margin-bottom: 20px;
}

.card h3 { font-size: 1.25rem; color: var(--color-white); margin-bottom: 12px; }

.card p { color: var(--color-text-muted); font-size: .95rem; }

/* ===== Feature List ===== */
.feature-list { list-style: none; display: grid; gap: 16px; }

.feature-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    color: var(--color-text);
    font-size: 1rem;
}

.feature-list li::before {
    content: '\2713';
    color: var(--color-primary);
    font-weight: 800;
    flex-shrink: 0;
    margin-top: 2px;
}

/* ===== Two Column ===== */
.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.two-col h2 {
    font-size: 2rem;
    color: var(--color-white);
    margin-bottom: 20px;
}

.two-col p { color: var(--color-text-muted); margin-bottom: 24px; }

/* ===== Forms ===== */
.form-wrap { max-width: 560px; margin: 0 auto; }

.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.contact-layout .form-wrap { width: 100%; margin: 0; }
.contact-details h2 { color: var(--color-white); font-size: 1.5rem; margin-bottom: 8px; }
.contact-details > p { color: var(--color-text-muted); margin-bottom: 24px; }
.contact-details dl { display: grid; gap: 18px; }
.contact-details dt { color: var(--color-text-muted); font-size: .9rem; }
.contact-details dd { color: var(--color-text); }

.form-group { margin-bottom: 20px; }

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--color-text);
    font-weight: 500;
    font-size: .95rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    color: var(--color-text);
    font-family: var(--font);
    font-size: .95rem;
    transition: border-color .2s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-group textarea { resize: vertical; min-height: 130px; }

.alert-success {
    background: rgba(46,196,182,.12);
    border: 1px solid var(--color-accent);
    color: var(--color-accent);
    padding: 16px 20px;
    border-radius: 10px;
    margin-bottom: 24px;
    text-align: center;
    font-weight: 600;
}

/* ===== Article Cards ===== */
.article-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: border-color .25s, transform .25s;
}

.article-card:hover { border-color: var(--color-primary); transform: translateY(-4px); }

.article-card .article-body { padding: 24px; }

.article-card h3 { font-size: 1.2rem; color: var(--color-white); margin-bottom: 10px; }

.article-card p { color: var(--color-text-muted); font-size: .92rem; margin-bottom: 16px; }

.article-meta { font-size: .82rem; color: var(--color-text-muted); }

/* ===== Single Article ===== */
.article-detail { max-width: 760px; margin: 0 auto; }

.article-detail h1 { font-size: 2.2rem; color: var(--color-white); margin-bottom: 12px; }

.article-detail .article-meta { margin-bottom: 28px; }

.article-detail .article-body { font-size: 1.05rem; color: var(--color-text); line-height: 2; }

/* ===== CTA Banner ===== */
.cta-banner {
    background: linear-gradient(135deg, var(--color-surface), var(--color-surface-2));
    border: 1px solid var(--color-border);
    border-radius: 20px;
    padding: 56px;
    text-align: center;
    margin-top: 40px;
}

.cta-banner h2 { font-size: 2rem; color: var(--color-white); margin-bottom: 16px; }

.cta-banner p { color: var(--color-text-muted); margin-bottom: 30px; font-size: 1.1rem; }

/* ===== Footer ===== */
.site-footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: 60px 0 30px;
    margin-top: 80px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand h3 { color: var(--color-white); font-size: 1.3rem; margin-bottom: 12px; }
.footer-brand p { color: var(--color-text-muted); font-size: .92rem; }

.footer-col h4 { color: var(--color-white); font-size: 1rem; margin-bottom: 16px; }

.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }

.footer-col ul a { color: var(--color-text-muted); font-size: .92rem; }
.footer-col ul a:hover { color: var(--color-primary); }

.footer-social { display: flex; gap: 14px; margin-top: 16px; }

.footer-social a {
    width: 40px; height: 40px;
    display: flex; align-items: center; justify-content: center;
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    color: var(--color-text-muted);
    font-size: 1.1rem;
    transition: all .2s;
}

.footer-social a:hover { color: var(--color-primary); border-color: var(--color-primary); }

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding-top: 20px;
    text-align: center;
    color: var(--color-text-muted);
    font-size: .85rem;
}

/* ===== Page Header ===== */
.page-header {
    padding: 60px 0 40px;
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    color: var(--color-white);
    margin-bottom: 12px;
}

.page-header p { color: var(--color-text-muted); font-size: 1.1rem; max-width: 600px; margin: 0 auto; }

/* ===== Responsive ===== */
@media (max-width: 900px) {
    .two-col { grid-template-columns: 1fr; gap: 30px; }
    .contact-layout { grid-template-columns: 1fr; gap: 36px; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
}

@media (max-width: 640px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 68px;
        right: 0;
        left: 0;
        background: var(--color-surface);
        flex-direction: column;
        padding: 20px 24px;
        gap: 16px;
        border-bottom: 1px solid var(--color-border);
    }
    .nav-links.open { display: flex; }
    .nav-toggle { display: block; }
    .nav-cta { display: none; }
    .nav-links .nav-cta-mobile { display: inline-block; }

    .hero h1 { font-size: 2rem; }
    .hero p { font-size: 1rem; }

    .section-title { font-size: 1.7rem; }

    .cta-banner { padding: 36px 24px; }

    .footer-grid { grid-template-columns: 1fr; }
}