/* ===== АНИМИРОВАННАЯ ШАПКА — ТОЛЬКО ШАПКА, БЕЗ ГЛОБАЛЬНЫХ СТИЛЕЙ ===== */

/* Липкая шапка с эффектом стекла */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    height: 80px;
    background: rgba(10, 20, 40, 0.6);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(148, 180, 255, 0.08);
    transition: height 0.4s cubic-bezier(0.4, 0, 0.2, 1),
                background 0.4s,
                box-shadow 0.4s;
    overflow: hidden;
}

.site-header.scrolled {
    height: 68px;
    background: rgba(5, 10, 20, 0.9);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

/* Светящаяся анимированная линия снизу */
.site-header::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg,
        transparent 0%,
        rgba(0, 180, 255, 0.6) 30%,
        rgba(79, 140, 255, 0.8) 50%,
        rgba(0, 180, 255, 0.6) 70%,
        transparent 100%);
    background-size: 200% 100%;
    animation: lineMove 8s linear infinite;
    opacity: 0.6;
    pointer-events: none;
}

@keyframes lineMove {
    0% { background-position: 0% 50%; }
    100% { background-position: 200% 50%; }
}

/* Фоновые плавающие градиентные пятна */
.header-bg-anim {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
    z-index: 0;
}

.header-bg-anim .blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.35;
    will-change: transform;
}

.blob-1 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, #00b4ff, transparent 70%);
    top: -100px;
    left: -50px;
    animation: blobFloat1 5s ease-in-out infinite;
}
.blob-2 {
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, #4f8cff, transparent 70%);
    top: -80px;
    left: 40%;
    animation: blobFloat2 18s ease-in-out infinite;
}
.blob-3 {
    width: 280px;
    height: 280px;
    background: radial-gradient(circle, #8b5cf6, transparent 70%);
    top: -100px;
    right: -50px;
    animation: blobFloat3 20s ease-in-out infinite;
}

@keyframes blobFloat1 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(80px, 30px) scale(1.15); }
}
@keyframes blobFloat2 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-60px, 20px) scale(0.9); }
}
@keyframes blobFloat3 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-70px, 40px) scale(1.1); }
}

/* Внутренний контейнер */
.site-header .container {
    position: relative;
    z-index: 1;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
}

/* Логотип */
.site-header .logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
    transition: transform 0.3s;
}
.site-header .logo:hover {
    transform: scale(1.03);
}
.site-header .logo img {
    height: 55px;
    width: auto;
    transition: height 0.4s;
}
.site-header.scrolled .logo img {
    height: 44px;
}

/* Меню */
.site-header .main-nav ul {
    display: flex;
    gap: 6px;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
}

.site-header .nav-link {
    position: relative;
    display: inline-block;
    padding: 10px 16px;          /* горизонтальные отступы задают рамку для подсветки */
    color: #c8d6e5;
    font-weight: 600;
    font-size: 14.5px;
    border-radius: 10px;
    transition: color 0.3s, transform 0.3s;
    text-decoration: none;
    z-index: 1;
    line-height: 1.2;
}

/* Стеклянная подсветка вокруг ссылки */
.site-header .nav-link::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(0, 180, 255, 0.12), rgba(79, 140, 255, 0.12));
    border: 1px solid rgba(0, 180, 255, 0.2);
    border-radius: 10px;
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.35s, transform 0.35s;
    z-index: -1;
}

/* Подчёркивание под текстом ровно по ширине текста */
.site-header .nav-link::after {
    content: "";
    position: absolute;
    left: 16px;                  /* = горизонтальному padding */
    right: 16px;                 /* = горизонтальному padding */
    bottom: 4px;                 /* ближе к тексту */
    height: 2px;
    background: linear-gradient(90deg, #00b4ff, #4f8cff);
    border-radius: 2px;
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.3s ease;
    box-shadow: 0 0 10px rgba(0, 180, 255, 0.8);
    pointer-events: none;
}

.site-header .nav-link:hover {
    color: #ffffff;
    transform: translateY(-2px);
}
.site-header .nav-link:hover::before {
    opacity: 1;
    transform: scale(1);
}
.site-header .nav-link:hover::after {
    transform: scaleX(1);
}

.site-header .nav-link.active {
    color: #ffffff;
}
.site-header .nav-link.active::before {
    opacity: 1;
    transform: scale(1);
    background: linear-gradient(120deg, rgba(0, 180, 255, 0.18), rgba(79, 140, 255, 0.18));
    border-color: rgba(0, 180, 255, 0.4);
}
.site-header .nav-link.active::after {
    transform: scaleX(1);
}

/* Телефон */
.site-header .header-phone a {
    color: #ffffff;
    font-weight: 700;
    font-size: 15px;
    white-space: nowrap;
    text-decoration: none;
    transition: color 0.3s, text-shadow 0.3s;
}
.site-header .header-phone a:hover {
    color: #00b4ff;
    text-shadow: 0 0 15px rgba(0, 180, 255, 0.7);
}

/* Бургер */
.site-header .mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 28px;
    color: #ffffff;
    cursor: pointer;
    padding: 4px 12px;
    border-radius: 8px;
    transition: background 0.3s, transform 0.3s;
}
.site-header .mobile-menu-btn:hover {
    background: rgba(0, 180, 255, 0.15);
    transform: scale(1.05);
}

/* Адаптив */
@media (max-width: 1100px) {
    .site-header .nav-link {
        padding: 10px 12px;
        font-size: 13.5px;
    }
    .site-header .nav-link::after {
        left: 12px;
        right: 12px;
    }
    .site-header .header-phone a {
        font-size: 14px;
    }
}
@media (max-width: 900px) {
    .site-header .header-phone {
        display: none;
    }
}
@media (max-width: 768px) {
    .site-header .mobile-menu-btn {
        display: block;
    }
    .site-header .main-nav {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: rgba(5, 10, 20, 0.98);
        backdrop-filter: blur(20px);
        padding: 20px;
        transform: translateY(-120%);
        opacity: 0;
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        pointer-events: none;
        border-bottom: 1px solid rgba(0, 180, 255, 0.2);
        z-index: 999;
    }
    .site-header .main-nav.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
    .site-header .main-nav ul {
        flex-direction: column;
        gap: 10px;
    }
    .site-header .nav-link {
        width: 100%;
        padding: 14px 20px;
        font-size: 16px;
    }
    .site-header .nav-link::after {
        left: 20px;
        right: 20px;
        bottom: 8px;
    }
    .site-header .logo img {
        height: 45px;
    }
}