:root {
    --dark-navy: #0b2a58;
    --blue-start: #4a90e2;
    --blue-end: #2962ff;
    --border-light: #e8edf4;
}

.main-header {
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 10px 0;
    background: rgba(11, 42, 88, 0.08);
    backdrop-filter: blur(10px);
}

.container {
    width: min(1240px, 92vw);
    margin: 0 auto;
}

.header-shell {
    background: #ffffff;
    border-radius: 14px;
    box-shadow: 0 8px 26px rgba(7, 30, 67, 0.14);
    border: 1px solid #e6edf8;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
}

.logo {
    font-size: 38px;
    font-weight: 800;
    letter-spacing: -1.2px;
    color: #0f1116;
    text-decoration: none;
    cursor: pointer;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 34px;
}

.nav-links a,
.nav-dropdown-btn {
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
    color: #141923;
    text-transform: uppercase;
    letter-spacing: 0.25px;
    background: none;
    border: 0;
    cursor: pointer;
    font-family: 'Inter', sans-serif;
}

.nav-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 14px);
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    list-style: none;
    min-width: 190px;
    padding: 8px;
    border-radius: 12px;
    border: 1px solid var(--border-light);
    background: #fff;
    box-shadow: 0 18px 36px rgba(12, 29, 56, 0.16);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
    z-index: 200;
}

.nav-dropdown:hover .dropdown-menu,
.group:hover .dropdown-menu {
    opacity: 1 !important;
    visibility: visible !important;
    transform: translateX(-50%) translateY(0) !important;
}

.dropdown-menu a {
    display: block;
    padding: 10px 12px;
    border-radius: 8px;
    text-transform: none;
    font-size: 14px;
    color: #1d2738;
    text-decoration: none;
}

.dropdown-menu a:hover {
    background: #eef5ff;
    color: var(--blue-end);
}

.btn-primary {
    border: 0;
    text-decoration: none;
    color: #fff;
    background: linear-gradient(135deg, var(--blue-start), var(--blue-end));
    border-radius: 999px;
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 0.2px;
    padding: 12px 26px;
    box-shadow: 0 8px 22px rgba(41, 98, 255, 0.4);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: inline-block;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 26px rgba(41, 98, 255, 0.48);
}

@media (max-width: 780px) {
    .main-header { padding: 12px 0; }
    .logo { font-size: 28px; }
    .nav-links { display: none; }
    .mobile-menu-btn {
        display: flex;
        flex-direction: column;
        gap: 4px;
        width: 28px;
        height: 20px;
        cursor: pointer;
        padding: 0;
        background: none;
        border: none;
    }
    .mobile-menu-line {
        height: 3px;
        width: 100%;
        background: #141923;
        border-radius: 2px;
        transition: all 0.3s ease;
    }
    .mobile-menu-open .mobile-menu-line:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
    .mobile-menu-open .mobile-menu-line:nth-child(2) { opacity: 0; }
    .mobile-menu-open .mobile-menu-line:nth-child(3) { transform: rotate(-45deg) translate(7px, -6px); }
    .mobile-menu {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(20px);
        z-index: 999;
        opacity: 0;
        visibility: hidden;
        transform: translateX(-100%);
        transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }
    .mobile-menu-open .mobile-menu {
        opacity: 1;
        visibility: visible;
        transform: translateX(0);
    }
    .mobile-menu-overlay {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0,0,0,0.3);
        z-index: -1;
    }
    .mobile-menu-nav {
        height: 100%;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 24px;
        padding: 0 24px;
    }
    .mobile-menu-link {
        font-size: 28px;
        font-weight: 800;
        color: #141923;
        text-decoration: none;
        text-transform: uppercase;
        letter-spacing: 0.5px;
        opacity: 0;
        transform: translateY(20px);
        transition: all 0.3s ease;
    }
    .mobile-menu-open .mobile-menu-link {
        opacity: 1;
        transform: translateY(0);
    }
    .mobile-menu-open .mobile-menu-link:nth-child(1) { transition-delay: 0.1s; }
    .mobile-menu-open .mobile-menu-link:nth-child(2) { transition-delay: 0.15s; }
    .mobile-menu-open .mobile-menu-link:nth-child(3) { transition-delay: 0.2s; }
    .mobile-menu-open .mobile-menu-link:nth-child(4) { transition-delay: 0.25s; }
    .mobile-menu-cta {
        margin-top: 40px;
        padding: 16px 32px;
        background: linear-gradient(135deg, var(--blue-start), var(--blue-end));
        color: white;
        border-radius: 50px;
        font-weight: 700;
        font-size: 18px;
        text-decoration: none;
        box-shadow: 0 8px 20px rgba(41,98,255,0.4);
    }
    .btn-primary { font-size: 13px; padding: 10px 18px; }
}