:root {
    --bg: #f0f7fc;
    --surface: #ffffff;
    --surface-alt: #e8f4fa;
    --ink: #2d3748;
    --ink-soft: #4a5568;
    --brand: #4a9fd4;
    --brand-2: #5ba8d9;
    --accent: #3d8ab8;
    --line: rgba(45, 55, 72, 0.12);
    --line-strong: rgba(45, 55, 72, 0.2);
    --shadow: 0 22px 55px rgba(45, 55, 72, 0.13);
    --shadow-soft: 0 12px 30px rgba(45, 55, 72, 0.09);
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 10px;
    --container: 1180px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: var(--ink);
    background:
        radial-gradient(1200px 500px at -10% -10%, rgba(74, 159, 212, 0.15), transparent),
        radial-gradient(900px 420px at 110% 0%, rgba(91, 168, 217, 0.14), transparent),
        var(--bg);
    line-height: 1.65;
}

main {
    min-height: 60vh;
}

.header-container,
.footer-container,
.section-container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 1.2rem;
}

.main-header {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background: rgba(240, 247, 252, 0.88);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-soft);
}

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

.logo {
    text-decoration: none;
    color: var(--ink);
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
}

.logo::before {
    content: "";
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: linear-gradient(140deg, var(--brand), var(--brand-2));
    box-shadow: 0 0 0 4px rgba(74, 159, 212, 0.2);
}

.logo-text {
    font-family: "Outfit", sans-serif;
    font-weight: 700;
    font-size: 1.4rem;
    letter-spacing: -0.03em;
}

.logo-text .logo-pure {
    color: #2d3748;
}

.logo-text .logo-sight {
    color: #4a9fd4;
}

.main-nav {
    display: flex;
    align-items: center;
}

.nav-menu {
    list-style: none;
    display: flex;
    gap: 0.35rem;
}

.nav-link {
    text-decoration: none;
    color: var(--ink-soft);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.55rem 0.9rem;
    border-radius: 999px;
    transition: 0.2s ease;
    border: 1px solid transparent;
}

.nav-link:hover {
    color: var(--ink);
    background: rgba(74, 159, 212, 0.12);
    border-color: rgba(74, 159, 212, 0.26);
}

.mobile-menu-toggle {
    display: none;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 0.5rem;
    cursor: pointer;
    flex-direction: column;
    gap: 4px;
}

.mobile-menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--ink);
}

.main-footer {
    margin-top: 3rem;
    padding: 3rem 0;
    border-top: 1px solid var(--line);
    background: linear-gradient(180deg, #ffffff 0%, #e8f4fa 45%, #dceef8 100%);
    position: relative;
}

.main-footer::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, #4a9fd4, #5ba8d9, #3d8ab8);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
}

.footer-text,
.footer-links {
    color: var(--ink-soft);
    font-size: 0.95rem;
    line-height: 1.9;
}

.footer-link,
.contact-link {
    color: #2b6cb0;
    text-decoration: none;
}

.footer-link:hover,
.contact-link:hover {
    text-decoration: underline;
}

@media (max-width: 820px) {
    .mobile-menu-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 76px;
        left: 0;
        right: 0;
        transform: translateY(-130%);
        transition: 0.25s ease;
        flex-direction: column;
        background: var(--surface);
        border-bottom: 1px solid var(--line);
        padding: 1rem 1.2rem 1.2rem;
        box-shadow: var(--shadow);
    }

    .nav-menu.active {
        transform: translateY(0);
    }

    .nav-link {
        display: block;
        padding: 0.75rem 0.9rem;
    }

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