.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 28px;
    transition: background 0.4s var(--ease), padding 0.4s var(--ease), border-color 0.4s, bottom 0.4s var(--ease);
    border-bottom: 1px solid transparent;
}

.nav.scrolled {
    background: rgba(10, 11, 14, 0.72);
    backdrop-filter: blur(14px) saturate(140%);
    border-bottom: 1px solid var(--border);
    padding: 13px 28px;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: 11px;
    font-weight: 600;
    letter-spacing: 0.04em;
    font-size: 15px;
    position: relative;
    z-index: 101;
}

.nav__logo .mark {
    width: 30px;
    height: 30px;
    border-radius: 8px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #fff;
    font-weight: 700;
    font-size: 13px;
    box-shadow: 0 0 18px rgba(var(--accent-rgb), 0.45);
}

.nav__logo .mark span {
    transform: translateY(-0.5px);
}

.nav__links {
    display: flex;
    align-items: center;
    gap: 34px;
}

.nav__links a {
    font-size: 14px;
    color: var(--text-dim);
    letter-spacing: 0.02em;
    position: relative;
    transition: color 0.25s;
}

.nav__links a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -6px;
    height: 1px;
    width: 0;
    background: var(--accent);
    transition: width 0.3s var(--ease);
}

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

.nav__links a:hover::after {
    width: 100%;
}

.nav__cta {
    font-size: 14px;
    padding: 9px 18px;
    border-radius: 999px;
    border: 1px solid var(--border-strong);
    color: var(--text);
    transition: border-color 0.25s, background 0.25s, box-shadow 0.25s;
}

.nav__cta:hover {
    border-color: rgba(var(--accent-rgb), 0.7);
    box-shadow: 0 0 22px rgba(var(--accent-rgb), 0.3);
}

.nav__burger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 36px;
    height: 36px;
    padding: 6px;
    background: none;
    border: none;
    cursor: pointer;
    position: relative;
    z-index: 101;
}

.nav__burger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform 0.3s var(--ease), opacity 0.25s;
}

.nav.open .nav__burger span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav.open .nav__burger span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.nav.open .nav__burger span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}