.app-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 253, 251, 0.78);
    -webkit-backdrop-filter: saturate(160%) blur(14px);
    backdrop-filter: saturate(160%) blur(14px);
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease), background-color 0.3s var(--ease);
}

.app-bar.is-scrolled {
    background: rgba(255, 253, 251, 0.92);
    border-bottom-color: var(--c-line);
    box-shadow: 0 8px 30px -18px rgba(67, 17, 7, 0.35);
}

.app-bar__inner {
    display: flex;
    align-items: center;
    gap: 40px;
    height: var(--header-h);
}

.app-bar__logo {
    display: block;
    flex-shrink: 0;
    transition: transform 0.4s var(--ease-out);
}

.app-bar__logo:hover {
    transform: rotate(-6deg) scale(1.05);
}

.app-bar__logo img {
    width: 44px;
    height: 44px;
}

.app-bar__nav {
    display: flex;
    align-items: center;
    gap: clamp(18px, 2.4vw, 36px);
    margin-right: auto;
}

.app-bar__link {
    position: relative;
    padding: 6px 0;
    font-size: 15px;
    font-weight: 500;
    color: var(--c-text);
    text-decoration: none;
    transition: color 0.25s var(--ease);
}

.app-bar__link::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 1.5px;
    background: var(--c-primary);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.4s var(--ease-out);
}

.app-bar__link:hover,
.app-bar__link.is-active {
    color: var(--c-primary);
}

.app-bar__link:hover::after,
.app-bar__link.is-active::after {
    transform: scaleX(1);
    transform-origin: left;
}

.burger-icon {
    display: none;
    position: relative;
    width: 44px;
    height: 44px;
    margin-left: auto;
    border-radius: 50%;
}

.burger-icon span,
.mobile-menu__close span {
    position: absolute;
    left: 11px;
    width: 22px;
    height: 1.5px;
    background: var(--c-text);
    border-radius: 2px;
    transition: transform 0.3s var(--ease);
}

.burger-icon span:nth-child(1) {
    top: 15px;
}

.burger-icon span:nth-child(2) {
    top: 21px;
    width: 16px;
}

.burger-icon span:nth-child(3) {
    top: 27px;
}

.mobile-menu {
    position: fixed;
    inset: 0;
    z-index: 1001;
    display: flex;
    flex-direction: column;
    padding: 16px var(--gutter) 32px;
    background: var(--c-bg);
    overflow-y: auto;
    visibility: hidden;
    clip-path: circle(0% at calc(100% - 38px) 38px);
    transition: clip-path 0.6s var(--ease-out), visibility 0s linear 0.6s;
}

.mobile-menu.open {
    visibility: visible;
    clip-path: circle(150% at calc(100% - 38px) 38px);
    transition: clip-path 0.7s var(--ease-out), visibility 0s;
}

.mobile-menu__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 44px;
}

.mobile-menu__logo {
    width: 44px;
    height: 44px;
}

.mobile-menu__close {
    position: relative;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--c-surface);
}

.mobile-menu__close span {
    top: 21px;
}

.mobile-menu__close span:nth-child(1) {
    transform: rotate(45deg);
}

.mobile-menu__close span:nth-child(2) {
    transform: rotate(-45deg);
}

.mobile-menu__nav {
    display: flex;
    flex-direction: column;
    margin-top: 40px;
}

.mobile-link {
    padding: 14px 0;
    border-bottom: 1px solid var(--c-line);
    font-family: var(--font-serif);
    font-size: clamp(28px, 8vw, 40px);
    font-weight: 500;
    line-height: 1.2;
    color: var(--c-text);
    text-decoration: none;
}

.mobile-menu__cta {
    margin-top: 32px;
}

.mobile-menu__socials {
    display: flex;
    justify-content: center;
    gap: 14px;
    margin-top: auto;
    padding-top: 32px;
}

.mobile-menu__social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--c-surface);
    transition: transform 0.25s var(--ease);
}

.mobile-menu__social-link:active {
    transform: scale(0.92);
}

.mobile-menu__social-link img {
    width: 24px;
    height: 24px;
}

@media (max-width: 900px) {
    :root {
        --header-h: 64px;
    }

    .app-bar__nav,
    .app-bar__button {
        display: none;
    }

    .burger-icon {
        display: block;
    }
}