.t2k-header {
    background: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid var(--border-color, #d5e0eb);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.t2k-header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.t2k-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    gap: 0.85rem;
    color: var(--accent-secondary, #07133c);
}

.t2k-logo-img {
    height: 54px;
    width: 54px;
    display: block;
    flex-shrink: 0;
}

.t2k-logo-copy {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.t2k-logo-text {
    font-weight: 800;
    font-size: 1.15rem;
    color: var(--accent-secondary, #07133c);
    letter-spacing: -0.02em;
    line-height: 1;
}

.t2k-logo-subtext {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--text-muted, #7f8fa7);
    line-height: 1;
}

.t2k-nav-tabs {
    display: flex;
    gap: 0.25rem;
    background: var(--bg-tertiary, #edf3f9);
    padding: 4px;
    border-radius: 12px;
    overflow-x: auto;
    scrollbar-width: none;
}

.t2k-nav-tabs::-webkit-scrollbar {
    display: none;
}

.t2k-nav-tab {
    flex: 0 0 auto;
    padding: 0.5rem 1.05rem;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary, #4a5b75);
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    background: none;
    text-decoration: none;
    line-height: 1.4;
    white-space: nowrap;
    font-family: inherit;
}

.t2k-nav-tab:hover {
    color: var(--text-primary, #091633);
    background: var(--bg-hover, #e2ebf5);
    text-decoration: none;
}

.t2k-nav-tab.active {
    background: var(--gradient-accent, linear-gradient(135deg, #07133c 0%, #10dce8 100%));
    color: #ffffff;
    box-shadow: 0 8px 24px rgba(7, 19, 60, 0.18);
}

.t2k-header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.t2k-header-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.58rem 0.9rem;
    border: 1px solid var(--border-color, #d5e0eb);
    border-radius: 10px;
    background: var(--bg-primary, #ffffff);
    color: var(--text-primary, #091633);
    font-size: 0.86rem;
    font-weight: 700;
    text-decoration: none;
    white-space: nowrap;
}

.t2k-header-link.primary {
    background: var(--gradient-accent, linear-gradient(135deg, #07133c 0%, #10dce8 100%));
    color: #ffffff;
    border: none;
}

@media (max-width: 1180px) {
    .t2k-header-content {
        flex-wrap: wrap;
        gap: 1rem;
    }

    .t2k-nav-tabs {
        order: 3;
        width: 100%;
    }
}

@media (max-width: 760px) {
    .t2k-header {
        padding: 0.85rem 1rem;
    }

    .t2k-logo-img {
        height: 42px;
        width: 42px;
    }

    .t2k-logo-subtext {
        display: none;
    }

    .t2k-header-right {
        display: none;
    }

    .t2k-nav-tab {
        padding: 0.5rem 0.85rem;
    }
}