.site-header {
    position: relative;
    z-index: 20;
    padding: 24px 0 18px;
}

.header-inner {
    min-height: 66px;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 42px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 13px;
    flex-shrink: 0;
    color: var(--text);
    text-decoration: none;
}

.brand-mark {
    position: relative;
    display: block;
    width: 34px;
    height: 38px;
    flex: 0 0 auto;
}

.brand-shape {
    position: absolute;
    left: 0;
    display: block;
    border-radius: 999px 12px 999px 12px;
    transform: skewX(-15deg);
}

.brand-shape-one {
    top: 0;
    width: 32px;
    height: 11px;
    background: linear-gradient(
        90deg,
        var(--accent),
        var(--primary),
        var(--secondary)
    );
}

.brand-shape-two {
    top: 12px;
    width: 25px;
    height: 10px;
    background: linear-gradient(
        90deg,
        var(--primary),
        var(--secondary)
    );
}

.brand-shape-three {
    top: 24px;
    width: 15px;
    height: 10px;
    background: linear-gradient(
        90deg,
        var(--secondary),
        #a78bfa
    );
}

.brand-name {
    font-family: "Inter", sans-serif;
    font-size: 1.52rem;
    line-height: 1;
    letter-spacing: 0.14em;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
}

.main-navigation {
    justify-self: center;
    display: flex;
    align-items: center;
    gap: clamp(24px, 3vw, 48px);
}

.main-navigation a {
    position: relative;
    color: var(--text);
    font-size: 0.95rem;
    font-weight: 600;
    white-space: nowrap;
    text-decoration: none;
    transition:
        color 180ms ease,
        transform 180ms ease;
}

.main-navigation a::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -9px;
    height: 2px;
    border-radius: 999px;
    background: linear-gradient(
        90deg,
        var(--primary),
        var(--secondary)
    );
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 180ms ease;
}

.main-navigation a:hover,
.main-navigation a:focus-visible {
    color: var(--primary);
    transform: translateY(-1px);
}

.main-navigation a:hover::after,
.main-navigation a:focus-visible::after {
    transform: scaleX(1);
}

.nav-with-icon {
    display: inline-flex;
    align-items: center;
    gap: 7px;
}

.nav-with-icon span {
    position: relative;
    top: -1px;
    font-size: 0.88rem;
}

.header-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
}

.icon-button {
    width: 42px;
    height: 42px;
    display: inline-grid;
    place-items: center;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: transparent;
    color: var(--text);
    line-height: 1;
    cursor: pointer;
    transition:
        background-color 180ms ease,
        color 180ms ease,
        transform 180ms ease;
}

.icon-button svg {
    width: 22px;
    height: 22px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.7;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.icon-button:hover,
.icon-button:focus-visible {
    color: var(--primary);
    background: rgba(77, 115, 255, 0.08);
    transform: translateY(-1px);
}

.login-button {
    margin-left: 4px;
    padding: 13px 23px;
    border: 1px solid rgba(123, 97, 255, 0.12);
    border-radius: 999px;
    background:
        linear-gradient(
            135deg,
            rgba(77, 115, 255, 0.08),
            rgba(123, 97, 255, 0.13)
        );
    color: #4f46e5;
    font-size: 0.93rem;
    font-weight: 700;
    text-decoration: none;
    box-shadow: 0 10px 28px rgba(77, 115, 255, 0.09);
    transition:
        transform 180ms ease,
        box-shadow 180ms ease,
        background 180ms ease;
}

.login-button:hover,
.login-button:focus-visible {
    transform: translateY(-2px);
    background:
        linear-gradient(
            135deg,
            rgba(77, 115, 255, 0.14),
            rgba(123, 97, 255, 0.19)
        );
    box-shadow: 0 14px 34px rgba(77, 115, 255, 0.14);
}

.mobile-menu-button {
    display: none;
    width: 44px;
    height: 44px;
    padding: 11px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--surface);
    cursor: pointer;
}

.mobile-menu-button span {
    display: block;
    width: 100%;
    height: 2px;
    margin: 4px 0;
    border-radius: 999px;
    background: var(--text);
}

@media (max-width: 980px) {
    .header-inner {
        grid-template-columns: auto auto;
        justify-content: space-between;
    }

    .main-navigation,
    .header-actions {
        display: none;
    }

    .mobile-menu-button {
        display: block;
    }
}

@media (max-width: 560px) {
    .site-header {
        padding-top: 18px;
    }

    .header-inner {
        gap: 20px;
    }

    .brand {
        gap: 10px;
    }

    .brand-mark {
        width: 29px;
        height: 34px;
    }

    .brand-shape-one {
        width: 28px;
    }

    .brand-shape-two {
        width: 22px;
    }

    .brand-name {
        font-size: 1.28rem;
    }
}