:root {
    --bmosc-black: #0c0c0c;
    --bmosc-gold: #d8a324;
    --bmosc-red: #9f1d20;
    --bmosc-green: #1d6b3c;
    --bmosc-white: #ffffff;
    --bmosc-muted: #efefef;
}

.bmosc-site-header {
    position: sticky;
    top: 0;
    z-index: 9999;
    width: 100%;
    background: var(--bmosc-white);
    box-shadow: 0 4px 18px rgba(0, 0, 0, .14);
}

.bmosc-shell {
    width: min(1180px, calc(100% - 32px));
    margin-inline: auto;
}

.bmosc-topbar {
    background: var(--bmosc-black);
    color: var(--bmosc-white);
    font-size: .84rem;
    letter-spacing: .03em;
}

.bmosc-topbar .bmosc-shell {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    min-height: 34px;
}

.bmosc-topbar a {
    color: var(--bmosc-gold);
    text-decoration: none;
    font-weight: 700;
}

.bmosc-mainbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
    min-height: 104px;
}

.bmosc-brand {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    min-width: 280px;
    color: var(--bmosc-black);
    text-decoration: none;
}

.bmosc-logo {
    display: block;
    width: 92px;
    height: 82px;
    object-fit: contain;
}

.bmosc-brand-copy {
    display: grid;
    gap: 4px;
}

.bmosc-brand-copy strong {
    font-size: clamp(1.05rem, 1.7vw, 1.45rem);
    line-height: 1.05;
    text-transform: uppercase;
    letter-spacing: .02em;
}

.bmosc-brand-copy small {
    color: #5c5c5c;
    font-weight: 700;
    letter-spacing: .04em;
}

.bmosc-primary-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 20px;
    flex: 1;
}

.bmosc-nav-links,
.bmosc-nav-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.bmosc-nav-links a {
    position: relative;
    padding: 12px 9px;
    color: #1c1c1c;
    text-decoration: none;
    font-size: .94rem;
    font-weight: 750;
    white-space: nowrap;
}

.bmosc-nav-links a::after {
    content: "";
    position: absolute;
    left: 9px;
    right: 9px;
    bottom: 6px;
    height: 3px;
    background: var(--bmosc-gold);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform .2s ease;
}

.bmosc-nav-links a:hover::after,
.bmosc-nav-links a:focus-visible::after,
.bmosc-nav-links a.is-active::after {
    transform: scaleX(1);
}

.bmosc-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 10px 15px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 800;
    line-height: 1.1;
    text-align: center;
    transition: transform .18s ease, box-shadow .18s ease;
}

.bmosc-button:hover,
.bmosc-button:focus-visible {
    transform: translateY(-2px);
    box-shadow: 0 8px 18px rgba(0, 0, 0, .18);
}

.bmosc-button-join {
    background: var(--bmosc-green);
    color: var(--bmosc-white);
}

.bmosc-button-donate {
    background: var(--bmosc-red);
    color: var(--bmosc-white);
}

.bmosc-nav-toggle {
    display: none;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border: 2px solid var(--bmosc-black);
    border-radius: 6px;
    background: var(--bmosc-white);
    color: var(--bmosc-black);
    font: inherit;
    font-weight: 800;
    cursor: pointer;
}

.bmosc-nav-toggle-icon,
.bmosc-nav-toggle-icon::before,
.bmosc-nav-toggle-icon::after {
    display: block;
    width: 22px;
    height: 2px;
    background: currentColor;
}

.bmosc-nav-toggle-icon {
    position: relative;
}

.bmosc-nav-toggle-icon::before,
.bmosc-nav-toggle-icon::after {
    content: "";
    position: absolute;
    left: 0;
}

.bmosc-nav-toggle-icon::before { top: -7px; }
.bmosc-nav-toggle-icon::after { top: 7px; }

@media (max-width: 1050px) {
    .bmosc-mainbar-inner {
        min-height: 92px;
    }

    .bmosc-brand {
        min-width: 0;
    }

    .bmosc-logo {
        width: 78px;
        height: 70px;
    }

    .bmosc-nav-toggle {
        display: inline-flex;
    }

    .bmosc-primary-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        padding: 18px 16px 22px;
        background: var(--bmosc-white);
        border-top: 1px solid #ddd;
        box-shadow: 0 12px 20px rgba(0, 0, 0, .16);
    }

    .bmosc-primary-nav.is-open {
        display: block;
    }

    .bmosc-nav-links,
    .bmosc-nav-actions {
        width: min(720px, 100%);
        margin-inline: auto;
        display: grid;
        gap: 8px;
    }

    .bmosc-nav-links a {
        padding: 12px;
        border-bottom: 1px solid #e6e6e6;
    }

    .bmosc-nav-actions {
        grid-template-columns: 1fr 1fr;
        margin-top: 16px;
    }
}

@media (max-width: 620px) {
    .bmosc-shell {
        width: min(100% - 20px, 1180px);
    }

    .bmosc-topbar .bmosc-shell {
        justify-content: center;
        text-align: center;
    }

    .bmosc-topbar a {
        display: none;
    }

    .bmosc-brand-copy small {
        display: none;
    }

    .bmosc-brand-copy strong {
        font-size: .98rem;
        max-width: 170px;
    }

    .bmosc-logo {
        width: 66px;
        height: 60px;
    }

    .bmosc-nav-toggle-label {
        display: none;
    }

    .bmosc-nav-actions {
        grid-template-columns: 1fr;
    }
}