.presentation-controls {
    display: flex;
    flex: 0 0 auto;
    align-items: center;
    gap: 0.25rem;
    padding: 0.15rem 0;
}

.presentation-switch {
    display: inline-flex;
    gap: 0.15rem;
}

.presentation-switch .btn {
    min-width: 0;
    min-height: 0;
    padding: 0.18rem 0.32rem;
    border-radius: 6px !important;
    font-size: 0.65rem;
    font-weight: 700;
    line-height: 1.1;
    box-shadow: none;
}

.presentation-switch .btn.active {
    color: #fff;
    background: var(--brand-navy);
    border-color: var(--brand-navy);
}

.presentation-unit-hint {
    color: var(--ink-soft);
    font-size: 0.86em;
    font-weight: 600;
    white-space: nowrap;
}

@media (min-width: 992px) {
    .site-header .nav-link {
        padding: 0.5rem 0.52rem !important;
        font-size: 0.82rem;
        white-space: nowrap;
    }

    .site-header .navbar-nav {
        flex-wrap: nowrap;
    }
}

.site-main > .container h1,
.site-main > .calculator-page h1 {
    font-size: clamp(2rem, 3vw, 2.8rem);
    line-height: 1.1;
}

.site-main > .container .lead,
.site-main > .calculator-page .lead {
    font-size: 1.05rem;
}

.home-hero h1 {
    max-width: 720px;
    font-size: clamp(1.9rem, 2.8vw, 2.55rem);
    line-height: 1.08;
}

.home-hero .hero-copy {
    max-width: 680px;
    margin-top: 0.9rem;
    margin-bottom: 1.2rem;
    font-size: clamp(0.95rem, 1.2vw, 1.03rem);
}

.home-hero .hero-tools-grid {
    max-width: 640px;
    gap: 0.5rem;
}

.home-hero .hero-tools-grid .btn {
    min-height: 44px;
    padding: 0.42rem 0.85rem;
    font-size: 1rem;
    line-height: 1.2;
}

@media (max-width: 991.98px) {
    .presentation-controls {
        padding: 0.45rem 0 0.15rem;
    }
}

@media (max-width: 767.98px) {
    .site-main > .container h1,
    .site-main > .calculator-page h1 {
        font-size: 2rem;
    }

    .home-hero h1 {
        font-size: 1.9rem;
    }

    .home-hero .hero-tools-grid {
        max-width: none;
    }

    .home-hero .hero-tools-grid .btn {
        min-height: 44px;
        padding: 0.4rem 0.72rem;
        font-size: 0.95rem;
    }
}