@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes navDrawerItemIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.navbar {
    position: fixed;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 48px);
    max-width: 1200px;
    z-index: 1000;
    background: rgba(255,255,255,0.82);
    backdrop-filter: blur(20px) saturate(1.8);
    -webkit-backdrop-filter: blur(20px) saturate(1.8);
    border: 1px solid rgba(255,255,255,0.6);
    border-radius: var(--radius-full);
    padding: 12px 28px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.06);
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background 0.35s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.35s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.3s ease, top 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    animation: fadeIn 0.8s ease-out;
}

.navbar.scrolled {
    background: rgba(255,255,255,0.95);
    box-shadow: 0 4px 32px rgba(0,0,0,0.1);
    top: 8px;
}

.navbar__brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--blue-600);
}

.navbar__brand-icon {
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
    background: transparent;
    border-radius: 0;
    overflow: visible;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1rem;
    flex-shrink: 0;
}

.navbar__links {
    display: flex;
    align-items: center;
    gap: 4px;
}

.navbar__actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.navbar__top { display: contents; }
.navbar__panel { display: contents; }

.navbar__toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--gray-700);
    align-items: center;
    justify-content: center;
    -webkit-tap-highlight-color: transparent;
}

.navbar__burger {
    display: block;
    width: 22px;
    height: 14px;
    position: relative;
}

.navbar__burger-line {
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    height: 2px;
    border-radius: 2px;
    background: var(--gray-700);
    transition: transform 0.38s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.28s ease, top 0.38s cubic-bezier(0.22, 1, 0.36, 1);
}

.navbar__burger-line:nth-child(1) { top: 0; }
.navbar__burger-line:nth-child(2) { top: 6px; }
.navbar__burger-line:nth-child(3) { top: 12px; }

.navbar.open .navbar__burger-line:nth-child(1) { top: 6px; transform: rotate(45deg); }
.navbar.open .navbar__burger-line:nth-child(2) { opacity: 0; transform: scaleX(0.2); }
.navbar.open .navbar__burger-line:nth-child(3) { top: 6px; transform: rotate(-45deg); }

.section { padding: 100px 0; background: transparent; }
.section--alt { background: transparent; }

.section__header {
    text-align: center;
    margin-bottom: 64px;
}

.footer {
    background: transparent;
    color: var(--gray-600);
    padding: 64px 0 32px;
    border-top: 1px solid rgba(148, 163, 184, 0.22);
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 48px;
    margin-bottom: 48px;
}

.footer__bottom {
    border-top: 1px solid rgba(148, 163, 184, 0.2);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    flex-wrap: wrap;
    gap: 16px;
}

@media (min-width: 901px) {
    .navbar__toggle { display: none !important; }
}

@media (max-width: 900px) {
    .navbar {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        transform: none;
        width: 100%;
        max-width: none;
        margin: 0;
        padding: 10px 18px;
        padding-top: calc(env(safe-area-inset-top, 0px) + 10px);
        padding-bottom: 10px;
        border-radius: 0;
        border-left: none;
        border-right: none;
        border-top: none;
        border-bottom: 1px solid rgba(241, 245, 249, 0.9);
        backdrop-filter: blur(14px) saturate(1.4);
        -webkit-backdrop-filter: blur(14px) saturate(1.4);
        background: rgba(255, 255, 255, 0.94);
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        box-shadow: 0 1px 0 rgba(255, 255, 255, 0.75) inset, 0 4px 20px rgba(15, 23, 42, 0.06);
    }
    .navbar.scrolled {
        top: 0;
        background: rgba(255, 255, 255, 0.98);
        box-shadow: 0 1px 0 rgba(255, 255, 255, 0.65) inset, 0 10px 36px rgba(15, 23, 42, 0.11), 0 1px 0 rgba(226, 232, 240, 0.95);
        border-bottom-color: rgba(226, 232, 240, 0.98);
    }
    .navbar__top {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        gap: 12px;
    }
    .navbar__panel {
        display: block;
        position: absolute;
        left: 0;
        right: 0;
        top: calc(100% + 10px);
        padding: 12px 14px 18px;
        background: rgba(255, 255, 255, 0.98);
        border: 1px solid rgba(226, 232, 240, 0.95);
        border-radius: var(--radius-xl);
        box-shadow: 0 22px 56px rgba(15, 23, 42, 0.12), 0 8px 24px rgba(15, 23, 42, 0.06);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transform: translateY(-12px) scale(0.98);
        transform-origin: 50% 0;
        transition: opacity 0.42s cubic-bezier(0.22, 1, 0.36, 1), transform 0.45s cubic-bezier(0.22, 1, 0.36, 1), visibility 0s linear 0.42s;
    }
    .navbar.open .navbar__panel {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transform: translateY(0) scale(1);
        transition: opacity 0.42s cubic-bezier(0.22, 1, 0.36, 1), transform 0.45s cubic-bezier(0.22, 1, 0.36, 1), visibility 0s;
    }
    .navbar__toggle {
        display: inline-flex;
        flex-shrink: 0;
        margin-left: auto;
    }
    .navbar__links { flex-direction: column; gap: 4px; }
    .navbar__actions {
        flex-direction: column;
        gap: 10px;
        align-items: stretch;
        margin-top: 8px;
        padding-top: 14px;
        border-top: 1px solid var(--gray-100);
    }
    .navbar__actions .btn {
        width: 100%;
        justify-content: center;
        min-height: 48px;
    }
    .navbar:not(.open) .navbar__panel .navbar__link,
    .navbar:not(.open) .navbar__panel .navbar__actions .btn {
        opacity: 0;
        transform: translateY(8px);
        animation: none;
    }
    .navbar.open .navbar__panel .navbar__link {
        animation: navDrawerItemIn 0.44s cubic-bezier(0.22, 1, 0.36, 1) both;
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 10px 16px;
        padding-top: calc(env(safe-area-inset-top, 0px) + 10px);
        padding-bottom: 10px;
        backdrop-filter: blur(12px) saturate(1.35);
        -webkit-backdrop-filter: blur(12px) saturate(1.35);
    }
    .navbar__brand { font-size: 1.12rem; gap: 8px; min-width: 0; }
    .navbar__brand span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    .navbar__brand-icon { width: 40px; height: 40px; min-width: 40px; min-height: 40px; font-size: 0.95rem; }
    .navbar__toggle { min-width: 44px; min-height: 44px; border-radius: var(--radius-md); }
    .section { padding: 76px 0; }
    .section__header { margin-bottom: 40px; }
}

@media (max-width: 500px) {
    .footer__grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .footer__grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}