:root {
    color-scheme: dark;
}

.nav-container {
    width: min(1280px, 94vw);
    position: relative;
    margin: 0 auto 1.5rem;
    padding: 0.5rem 0.85rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.9rem;
    background: linear-gradient(150deg, rgba(8, 13, 26, 0.94), rgba(16, 28, 52, 0.78));
    border: 1px solid rgba(59, 130, 246, 0.26);
    border-radius: 10px;
    box-shadow: 0 26px 56px rgba(5, 9, 22, 0.55);
    backdrop-filter: blur(16px);
    overflow: visible;
    z-index: 1000;
}

.nav-container::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top left, rgba(59, 130, 246, 0.2), transparent 60%),
                radial-gradient(circle at bottom right, rgba(30, 64, 175, 0.18), transparent 55%);
    pointer-events: none;
    opacity: 0.9;
    border-radius: inherit;
}

.nav-bar {
    position: relative;
    z-index: 1;
    flex: 1 1 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.nav-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text);
    letter-spacing: 0.16em;
    text-transform: uppercase;
    white-space: nowrap;
}

.nav-toggle {
    position: relative;
    z-index: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.35rem;
    height: 2.35rem;
    border-radius: 999px;
    border: 1px solid rgba(59, 130, 246, 0.45);
    background: rgba(59, 130, 246, 0.2);
    color: var(--text);
    cursor: pointer;
    transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
    box-shadow: 0 14px 28px rgba(5, 9, 22, 0.35);
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
    background: rgba(59, 130, 246, 0.3);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 20px 36px rgba(5, 9, 22, 0.45);
    outline: none;
}

.nav-toggle .icon {
    pointer-events: none;
    font-size: 1.2rem;
}

.nav-toggle .icon-close { display: none; }
.nav-toggle.open .icon-close { display: inline; }
.nav-toggle.open .icon-hamburger { display: none; }

.navigation {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.nav-drawer {
    position: fixed;
    inset: 0 auto 0 0;
    height: 100vh;
    width: min(280px, 82%);
    padding: 1.4rem 1.25rem;
    background: rgba(6, 12, 24, 0.96);
    border-right: 1px solid rgba(59, 130, 246, 0.24);
    box-shadow: 0 30px 60px rgba(4, 9, 22, 0.55);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    z-index: 1001;
    overflow-y: auto;
    backdrop-filter: blur(16px);
}

.nav-drawer.open { transform: translateX(0); }

.nav-link {
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.7rem;
    padding: 0.6rem 1rem;
    background: rgba(14, 22, 40, 0.78);
    border: 1px solid rgba(148, 163, 184, 0.24);
    border-radius: 10px;
    color: rgba(226, 232, 240, 0.9);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    line-height: 1.2;
    letter-spacing: 0.01em;
    transition: color var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition), background var(--transition);
    overflow: hidden;
    white-space: nowrap;
}

.nav-link.nav-group-toggle {
    border: 1px solid rgba(148, 163, 184, 0.24);
    width: 100%;
    text-align: left;
    cursor: pointer;
}

.nav-link.nav-group-toggle .nav-link-text {
    flex: 1;
}

.nav-group {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.nav-submenu {
    display: none;
    flex-direction: column;
    gap: 0.45rem;
    padding-left: 0.35rem;
}

.nav-group.open .nav-submenu {
    display: flex;
}

.nav-sublink {
    background: rgba(12, 20, 36, 0.58);
    border-color: rgba(59, 130, 246, 0.18);
}

.nav-caret {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.35rem;
    height: 1.35rem;
    border-radius: 50%;
    background: rgba(148, 163, 184, 0.12);
    transition: transform var(--transition), background var(--transition);
}

.nav-group.open .nav-caret {
    transform: rotate(180deg);
    background: rgba(59, 130, 246, 0.16);
}

.nav-link::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.24), rgba(99, 102, 241, 0.1));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.nav-link > * { position: relative; z-index: 1; }

.nav-link-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.nav-link:hover {
    color: var(--text);
    border-color: rgba(59, 130, 246, 0.45);
    box-shadow: 0 20px 38px rgba(5, 9, 22, 0.45);
    transform: translateY(-1px);
}

.nav-link:hover::before { opacity: 1; }

.nav-link.active {
    color: #0b1120;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.95), rgba(37, 99, 235, 0.9));
    border-color: rgba(59, 130, 246, 0.7);
    box-shadow: 0 24px 40px rgba(5, 9, 22, 0.5);
    transform: translateY(-1px);
}

.nav-group-toggle.active {
    box-shadow: 0 24px 40px rgba(5, 9, 22, 0.5);
}

.nav-link.active::before {
    opacity: 1;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.32), rgba(37, 99, 235, 0.18));
}

.nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(4, 7, 18, 0.55);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 1000;
}

.nav-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

@media (min-width: 768px) {
    .nav-container {
        width: min(1360px, 90vw);
        padding: 0.6rem 1rem;
        gap: 1.2rem;
    }

    .nav-bar { flex: 0 0 auto; }
    .nav-toggle { display: none; }
    .nav-overlay { display: none !important; }

    .nav-drawer {
        position: static;
        transform: none;
        height: auto;
        width: auto;
        padding: 0;
        background: transparent;
        border: none;
        box-shadow: none;
        overflow: visible;
    }

    .navigation {
        flex-direction: row;
        align-items: center;
        justify-content: flex-end;
        gap: 0.65rem;
        flex-wrap: nowrap;
    }

    .nav-link {
        padding: 0.55rem 1.15rem;
        border-radius: 10px;
        background: rgba(12, 20, 36, 0.58);
        border-color: rgba(59, 130, 246, 0.3);
        box-shadow: none;
    }

    .nav-group { position: relative; }

    .nav-submenu {
        position: absolute;
        top: calc(100% + 0.4rem);
        left: 0;
        min-width: 230px;
        padding: 0.55rem 0.45rem;
        background: rgba(8, 13, 26, 0.96);
        border: 1px solid rgba(59, 130, 246, 0.26);
        border-radius: 10px;
        box-shadow: 0 20px 40px rgba(5, 9, 22, 0.6);
        z-index: 10;
    }

    .nav-link:hover { box-shadow: 0 18px 36px rgba(5, 9, 22, 0.45); }
    .nav-link.active { box-shadow: 0 22px 40px rgba(5, 9, 22, 0.5); }
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}