:root {
    --navH: 55px;
    --dropH: 42px;
    --bg: transparent;
    --panel: rgba(20, 22, 22, 0.80);
    --border: rgba(193,255,253,0.12);
    --text: rgba(233,242,242,0.92);
    --muted: rgba(233,242,242,0.72);
    --radius: 12px;
}

* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
}

body {
    margin: 0;
    background: var(--bg);
    padding-top: var(--navH);
}

/* Sticky Nav */
.topnav {
    position: sticky;
    top: 0;
    z-index: 9999;
    height: var(--navH);
    background: var(--panel);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);

}

.topnav__inner {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 14px;
}

/* Square logo button */
.logoBtn {
    width: 42px;
    height: 42px;
    padding: 0;
    border: 0;
    background: transparent;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius);
}

.logoImg {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
    border-radius: var(--radius);
}

/* Thin dropdown */
.navDrop {
    position: absolute;
    left: 0;
    right: 0;
    top: var(--navH);
    height: var(--dropH);
    background: rgba(20,22,22,0.92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 3001;
    overflow: hidden;
    transform-origin: top;
    transform: scaleY(0);
    opacity: 0;
    pointer-events: none;
    transition: transform 160ms ease, opacity 160ms ease;
}

.topnav.is-open .navDrop {
    transform: scaleY(1);
    opacity: 1;
    pointer-events: auto;
}

.navDrop__inner {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 18px;
    padding: 0 14px;
}
/* Smooth “submenu swap” animation */
#navDropInner.is-swapping {
    opacity: 0;
    transform: translateY(-4px);
    transition: opacity 140ms ease, transform 140ms ease;
}

#navDropInner {
    transition: opacity 140ms ease, transform 140ms ease;
}

.navLink {
    color: var(--muted);
    text-decoration: none;
    font: 700 13px/1 system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 6px 8px;
    border-radius: 10px;
}

    .navLink:hover {
        color: var(--text);
    }

/* ===== Mobile: vertical dropdown menu ===== */
@media (max-width: 520px) {
    /* make the dropdown taller and allow stacking */
    .navDrop {
        height: auto; /* override thin bar */
        padding: 10px 0;
    }

    .navDrop__inner {
        height: auto;
        flex-direction: column; /* STACK */
        align-items: stretch; /* full-width rows */
        justify-content: flex-start;
        gap: 8px;
        padding: 0 14px;
    }

    .navLink {
        width: 100%;
        height: 44px; /* good tap target */
        display: flex;
        align-items: center;
        justify-content: center; /* center text; change to flex-start if you want left aligned */
        border-radius: 14px;
        border: 1px solid rgba(255,255,255,0.10);
        background: rgba(255,255,255,0.04);
        text-transform: none; /* optional: remove uppercase on mobile */
        letter-spacing: 0.02em; /* optional: calmer spacing */
    }

        .navLink:active {
            transform: scale(0.99);
        }
}