:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --accent: #10b981;
    --bg: #f8fafc;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --card-bg: #ffffff;
}

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

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    color: var(--text-main);
    background: var(--bg);
    line-height: 1.6;
}

a {
    text-decoration: none;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    box-shadow: 0 8px 24px rgba(31, 45, 92, 0.08);
}

.navbar,
.about-hero,
.intro-section,
.mission-grid,
.team-section,
.site-footer {
    width: min(1120px, 92%);
    margin: auto;
}

.navbar {
    min-height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo,
.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: #333333;
    font-size: 22px;
    font-weight: 800;
}

.logo-icon {
    width: 40px;
    height: 40px;
    display: grid;
    place-items: center;
    color: #ffffff;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
}

.nav-links {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 24px;
}

.nav-links a {
    color: #333333;
    font-weight: 700;
}

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

.menu-button {
    display: none;
    width: 42px;
    height: 42px;
    border: 0;
    border-radius: 8px;
    background: #f4f7fc;
    cursor: pointer;
}

.menu-button span {
    display: block;
    width: 20px;
    height: 2px;
    margin: 5px auto;
    background: #333333;
}

.about-hero {
    padding: 86px 0 48px;
    text-align: center;
}

.section-label {
    color: var(--primary);
    font-size: 14px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
}

.about-hero h1 {
    max-width: 860px;
    margin: 0 auto 18px;
    font-size: clamp(38px, 5vw, 62px);
    line-height: 1.08;
}

.about-hero p,
.intro-section p,
.info-card p,
.team-card p,
.site-footer p {
    color: #333333;
}

.about-hero p {
    max-width: 760px;
    margin: auto;
    font-size: 18px;
}

.intro-section {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 32px;
    align-items: center;
    padding: 42px 0;
}

.intro-section h2,
.section-heading h2 {
    font-size: clamp(30px, 4vw, 46px);
    line-height: 1.15;
}

.mission-grid,
.team-grid {
    display: grid;
    gap: 22px;
}

.mission-grid {
    grid-template-columns: repeat(3, 1fr);
    padding: 42px 0;
}

.info-card,
.team-card {
    padding: 26px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--card-bg);
    box-shadow: 0 16px 34px rgba(37, 99, 235, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.info-card:hover,
.team-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 42px rgba(31, 45, 92, 0.14);
}

.info-card span {
    width: 44px;
    height: 44px;
    display: grid;
    place-items: center;
    color: #ffffff;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    font-weight: 800;
    margin-bottom: 18px;
}

.info-card h3,
.team-card h3 {
    margin-bottom: 8px;
}

.team-section {
    padding: 54px 0 76px;
}

.section-heading {
    margin-bottom: 32px;
}

.team-grid {
    grid-template-columns: repeat(4, 1fr);
}

.avatar {
    width: 58px;
    height: 58px;
    display: grid;
    place-items: center;
    color: #ffffff;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    font-weight: 800;
    margin-bottom: 16px;
}

.site-footer {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    padding: 34px 0;
    border-top: 1px solid #e2e8f0;
}

.site-footer p {
    margin-top: 8px;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    align-items: center;
}

.footer-links a {
    color: #333333;
    font-weight: 700;
}

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

@media (max-width: 900px) {
    .intro-section,
    .mission-grid,
    .team-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 720px) {
    .menu-button {
        display: block;
    }

    .nav-links {
        position: absolute;
        top: 76px;
        left: 0;
        right: 0;
        display: none;
        flex-direction: column;
        gap: 0;
        background: #ffffff;
        box-shadow: 0 16px 30px rgba(27, 58, 106, 0.08);
    }

    .nav-links.show {
        display: flex;
    }

    .nav-links li {
        width: 100%;
        text-align: center;
        border-top: 1px solid #e2e8f0;
    }

    .nav-links a {
        display: block;
        padding: 16px;
    }

    .intro-section,
    .mission-grid,
    .team-grid {
        grid-template-columns: 1fr;
    }

    .site-footer {
        flex-direction: column;
    }
}