.t1-header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: calc(var(--t1-header-h) + var(--t1-safe-top));
    padding-top: var(--t1-safe-top);
    transition: var(--t1-transition);
}

.t1-header.is-scrolled {
    backdrop-filter: blur(20px) saturate(1.4);
    background: var(--t1-overlay-strong);
    border-bottom: 1px solid var(--t1-border);
}

.t1-header__inner {
    width: min(1180px, calc(100% - (var(--t1-container-pad) * 2)));
    margin-inline: auto;
    height: var(--t1-header-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.t1-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 0;
}

.t1-brand__logo {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    object-fit: cover;
    border: 2px solid var(--t1-border);
    flex-shrink: 0;
}

.t1-brand__text {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.t1-brand__name {
    font-weight: 800;
    font-size: 1rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.t1-brand__slogan {
    font-size: 0.75rem;
    color: var(--t1-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.t1-nav-backdrop {
    display: none;
}

.t1-nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: var(--t1-touch-min);
    height: var(--t1-touch-min);
    flex-shrink: 0;
    padding: 0;
    border: 1px solid var(--t1-border);
    border-radius: 12px;
    background: var(--t1-surface);
    cursor: pointer;
}

.t1-nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    margin-inline: auto;
    background: var(--t1-text);
    border-radius: 2px;
    transition: var(--t1-transition);
}

.t1-nav {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.t1-nav__link {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: var(--t1-touch-min);
    padding: 0.55rem 1rem;
    border-radius: 999px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--t1-text-muted);
    transition: var(--t1-transition);
}

.t1-nav__link:hover,
.t1-nav__link.is-active {
    color: var(--t1-text);
    background: var(--t1-surface);
}

.t1-nav__link.is-active {
    box-shadow: inset 0 0 0 1px var(--t1-accent-border);
    color: var(--t1-accent);
}

.t1-nav__cta {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.55rem 1.1rem;
    margin-inline-start: 0.5rem;
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--t1-accent), var(--t1-accent-2));
    color: var(--t1-text-on-accent);
}

@media (max-width: 768px) {
    .t1-nav-toggle { display: flex; }

    .t1-nav-backdrop {
        display: block;
        position: fixed;
        inset: 0;
        z-index: 98;
        background: var(--t1-backdrop);
        backdrop-filter: blur(4px);
        animation: t1-fade-in 0.25s ease;
    }

    .t1-nav-backdrop[hidden] {
        display: none;
    }

    .t1-nav {
        position: fixed;
        top: calc(var(--t1-header-h) + var(--t1-safe-top) + 0.5rem);
        inset-inline: var(--t1-container-pad);
        max-height: calc(100dvh - var(--t1-header-h) - var(--t1-safe-top) - var(--t1-safe-bottom) - 1rem);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        flex-direction: column;
        align-items: stretch;
        padding: 0.75rem;
        border-radius: var(--t1-radius);
        background: var(--t1-overlay-nav);
        border: 1px solid var(--t1-border);
        backdrop-filter: blur(24px);
        box-shadow: var(--t1-shadow);
        z-index: 99;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-8px) scale(0.98);
        transition: var(--t1-transition);
    }

    .t1-nav.is-open {
        opacity: 1;
        visibility: visible;
        transform: translateY(0) scale(1);
    }

    .t1-nav__link {
        width: 100%;
        font-size: 1rem;
    }

    .t1-nav__cta {
        margin-inline-start: 0;
        justify-content: center;
        min-height: var(--t1-touch-min);
        margin-top: 0.25rem;
    }

    .t1-brand__logo {
        width: 42px;
        height: 42px;
        border-radius: 12px;
    }

    .t1-brand__name { font-size: 0.92rem; }
    .t1-brand__slogan { display: none; }
}

@keyframes t1-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}