/* ── Global nav vars ── */
:root {
    --nav-bg: #0d1017;
    --nav-border: rgba(77, 166, 255, .18);
    --nav-text: #9aa3b2;
    --nav-hover: #4da6ff;
    --nav-drop-bg: #1a1d27;
    --nav-drop-bd: #2e3050;
}

/* ── Header ── */
header {
    background: var(--nav-bg);
    font-family: 'Segoe UI', Arial, sans-serif;
    height: 64px;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--nav-border);
    box-shadow: 0 2px 24px rgba(0, 0, 0, .5);
}

.nav-height {
    height: 64px;
    padding: 0;
    padding-right: 23px;
}

/* ── Logo ── */
.logo-nav {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-grow: 1;
    height: 36px;
    width: 10%;
    flex-wrap: nowrap;
    background: #ffffff;
    border-radius: 6px;
    transition: box-shadow .2s;
}

.logo-nav:hover {
    box-shadow: 0 0 14px rgba(77, 166, 255, .35);
}

/* ── Main nav links ── */
.start-nav {
    display: flex;
    list-style: none;
    justify-content: flex-start;
    align-items: center;
    flex-grow: 1;
    width: 80%;
    margin: 0;
    padding: 0;
    gap: .2rem;
}

.start-nav > li,
.end-nav > li {
    position: relative;
    list-style: none;
}

.start-nav > li > a,
.end-nav > li > a {
    display: flex;
    align-items: center;
    gap: .35rem;
    padding: .45rem .85rem;
    color: var(--nav-text);
    text-decoration: none;
    font-size: .8rem;
    font-weight: 600;
    letter-spacing: .04em;
    border-radius: 6px;
    transition: color .2s, background .2s;
    cursor: pointer;
}

.start-nav > li > a:hover,
.end-nav > li > a:hover {
    color: var(--nav-hover);
    background: rgba(77, 166, 255, .08);
}

.start-nav > li > .fas,
.end-nav > li > .fas {
    color: var(--nav-text);
    font-size: .65rem;
    margin-left: .2rem;
    pointer-events: none;
}

/* ── Dropdowns ── */
.end-nav {
    width: 10%;
    display: flex;
    flex-direction: row-reverse;
    justify-content: flex-start;
    align-items: center;
    margin: 0;
    padding: 0;
}

.nav-pull-down {
    visibility: hidden;
    opacity: 0;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 160px;
    background: var(--nav-drop-bg);
    background-clip: padding-box;
    border: 1px solid var(--nav-drop-bd);
    border-top: 6px solid transparent;
    border-radius: 8px;
    padding: .4rem 0;
    list-style: none;
    margin: 0;
    box-shadow: 0 8px 32px rgba(0, 0, 0, .6);
    z-index: 2000;
    transition: opacity 0.15s ease, visibility 0.15s ease;
    transition-delay: 0.5s;
}

.end-nav .nav-pull-down {
    left: auto;
    right: 0;
}

.start-nav > li:hover .nav-pull-down,
.end-nav > li:hover .nav-pull-down,
.start-nav > li.nav-dropdown-pinned .nav-pull-down,
.end-nav > li.nav-dropdown-pinned .nav-pull-down {
    visibility: visible;
    opacity: 1;
    transition-delay: 0s;
}

.nav-pull-down li a {
    display: block;
    padding: .45rem 1rem;
    color: var(--nav-text);
    text-decoration: none;
    font-size: .8rem;
    font-weight: 500;
    transition: color .18s, background .18s;
}

.nav-pull-down li a:hover {
    color: var(--nav-hover);
    background: rgba(77, 166, 255, .07);
}

/* ── Tools mega-menu ── */
.nav-mega {
    min-width: 560px;
    padding: .6rem 0;
}

.nav-mega-columns {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0 .5rem;
    padding: 0 .5rem;
}

.nav-mega-col-title {
    display: block;
    padding: .3rem 1rem .25rem;
    color: var(--nav-hover);
    font-size: .68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .08em;
}