/* ============================================================
   ХЕДЕР — ФИНАЛЬНАЯ ВЕРСИЯ С АНИМАЦИЯМИ
   ============================================================ */

.header-premium {
    --header-dark-progress: 0;
    --header-transform-origin: bottom;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: padding 0.3s ease;
    background: #ffffff;
    isolation: isolate;
    overflow: hidden;
    border-bottom: none !important;
    box-shadow: none !important;
}

.header-premium::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #191720;
    z-index: 0;
    pointer-events: none;
    transform: scaleY(var(--header-dark-progress, 0));
    transform-origin: var(--header-transform-origin, bottom);
    transition: none;
    border-bottom: none !important;
    box-shadow: none !important;
}

.header-premium .container,
.header-premium .header-inner {
    position: relative;
    z-index: 1;
}

.admin-bar .header-premium {
    top: 32px;
}

@media (max-width: 782px) {
    .admin-bar .header-premium {
        top: 46px;
    }
}

@media (max-width: 600px) {
    .admin-bar .header-premium {
        top: 0;
    }
}

.header-premium .container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 24px;
}

.header-premium .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    gap: 20px;
}

.header-premium .header-nav {
    display: flex;
    align-items: center;
    gap: 24px;
}

/* ============================================================
   ЛОГОТИПЫ В ХЕДЕРЕ
   ============================================================ */

.logo-link {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    flex-shrink: 0;
}

.logo-link img {
    flex-shrink: 0;
    height: 32px;
    width: auto;
    transition: opacity 0.5s cubic-bezier(0.34, 1.56, 0.64, 1),
                transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Светлый логотип (logo3.png) виден по умолчанию */
.logo-light {
    display: block !important;
    opacity: 1;
    transform: scale(1);
}

.logo-dark {
    display: none !important;
    opacity: 0;
    transform: scale(0.9);
}

/* В темном режиме меняем логотипы */
.header-premium.header-dark .logo-light {
    display: none !important;
    opacity: 0;
    transform: scale(0.9);
}

.header-premium.header-dark .logo-dark {
    display: block !important;
    opacity: 1;
    transform: scale(1);
}

.site-title-premium {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "SF Pro Display", sans-serif;
    font-weight: 700;
    font-size: 1.3rem;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, #6d36d9 0%, #b58aff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    white-space: nowrap;
}

/* В темном режиме текст становится белым */
.header-premium.header-dark .site-title-premium {
    background: linear-gradient(135deg, #FFFFFF 0%, rgba(255, 255, 255, 0.7) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ============================================================
   АНИМАЦИИ ССЫЛОК
   ============================================================ */

.header-nav a {
    color: rgba(11, 28, 46, 0.65);
    font-weight: 500;
    font-size: 0.9rem;
    transition: color 0.3s ease, transform 0.25s ease;
    position: relative;
    text-decoration: none;
    white-space: nowrap;
    display: inline-block;
}

/* Подчеркивание при ховере */
.header-nav a:not(.btn-nav)::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #6d36d9, #b58aff);
    transition: width 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    border-radius: 2px;
}

.header-nav a:not(.btn-nav):hover::after {
    width: 100%;
}

.header-nav a:not(.btn-nav):hover {
    color: #191720;
    transform: translateY(-2px);
}

/* ============================================================
   КНОПКА С АНИМАЦИЕЙ
   ============================================================ */

.header-nav .btn-nav {
    background: linear-gradient(135deg, #6d36d9 0%, #b58aff 100%);
    color: white !important;
    padding: 10px 24px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    box-shadow: 0 4px 15px rgba(109, 54, 217, 0.25);
    transition: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1) !important;
    position: relative;
    overflow: hidden;
}

/* Эффект свечения */
.header-nav .btn-nav::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.25) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.5s ease;
    pointer-events: none;
}

.header-nav .btn-nav:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 8px 30px rgba(109, 54, 217, 0.4);
}

.header-nav .btn-nav:hover::before {
    opacity: 1;
}

.header-nav .btn-nav:active {
    transform: translateY(-1px) scale(0.96);
}

/* ============================================================
   ТЕМНАЯ ТЕМА
   ============================================================ */

.header-premium.header-dark .header-nav a:not(.btn-nav) {
    color: rgba(255, 255, 255, 0.7);
}

.header-premium.header-dark .header-nav a:not(.btn-nav):hover {
    color: rgba(255, 255, 255, 1);
}

.header-premium.header-dark .header-nav a:not(.btn-nav)::after {
    background: linear-gradient(90deg, #b58aff, #6d36d9);
}

.header-premium.header-dark .btn-nav {
    box-shadow: 0 4px 20px rgba(109, 54, 217, 0.35);
}

.header-premium.header-dark .btn-nav:hover {
    box-shadow: 0 8px 35px rgba(109, 54, 217, 0.55);
}

/* ============================================================
   АДАПТИВ
   ============================================================ */

@media (max-width: 768px) {
    .header-premium {
        padding: 10px 0;
        min-height: 56px;
    }
    
    .header-premium .container {
        padding: 0 16px;
    }
    
    .header-premium .header-nav a:not(.btn-nav) {
        display: none;
    }
    
    .header-premium .header-nav {
        margin-left: auto;
    }
    
    .header-nav .btn-nav {
        padding: 8px 18px;
        font-size: 0.8rem;
    }
    
    .logo-link img {
        height: 28px !important;
    }
    
    .site-title-premium {
        font-size: 1.1rem;
    }
}

/* ============================================================
   ЛОГОТИП — АВТОПЕРЕКЛЮЧЕНИЕ СВЕТЛЫЙ / ТЕМНЫЙ
   ============================================================ */

.logo-link {
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    flex-shrink: 0;
}

/* Общие параметры */
.logo-link img {
    height: 32px;
    width: auto;
    flex-shrink: 0;
    transition:
        opacity 0.35s ease,
        transform 0.35s ease;
}

/* Светлый хедер:
   показываем темный логотип logo3 */
.logo-light {
    opacity: 1;
    transform: scale(1);
}

/* Второй логотип лежит поверх первого */
.logo-dark {
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%) scale(0.96);
    opacity: 0;
    pointer-events: none;
}

/* ============================================================
   ТЕМНЫЙ ХЕДЕР
   ============================================================ */

/* logo3 исчезает */
.header-premium.header-dark .logo-light {
    opacity: 0;
    transform: scale(0.96);
}

/* logo.png появляется */
.header-premium.header-dark .logo-dark {
    opacity: 1;
    transform: translateY(-50%) scale(1);
}

/* Единая композиция бренда в шапке и подвале. */
.header-premium .logo-link.inspector-brand,
.site-footer .footer-logo.inspector-brand {
    --inspector-brand-scale: .88;
    display: inline-flex; align-items: flex-end; gap: calc(7px * var(--inspector-brand-scale));
    flex: 0 0 auto; text-decoration: none;
}
.inspector-brand .inspector-brand__mark {
    position: relative; display: block; flex: 0 0 auto;
    width: calc(76px * var(--inspector-brand-scale)); height: calc(34px * var(--inspector-brand-scale)); margin-bottom: calc(1px * var(--inspector-brand-scale));
}
.inspector-brand .inspector-brand__mark img {
    position: absolute; inset: 0; display: block !important;
    width: 100%; height: 100% !important; max-width: none;
    object-fit: contain; transform: none !important;
    transition: opacity .25s ease;
}
.inspector-brand .inspector-brand__mark .logo-light { opacity: 1; }
.inspector-brand .inspector-brand__mark .logo-dark { opacity: 0; }
.header-dark .inspector-brand .inspector-brand__mark .logo-light,
.inspector-brand--dark .inspector-brand__mark .logo-light { opacity: 0; }
.header-dark .inspector-brand .inspector-brand__mark .logo-dark,
.inspector-brand--dark .inspector-brand__mark .logo-dark { opacity: 1; }
.inspector-brand .inspector-brand__word {
    display: block; margin: 0; font-family: Inter, system-ui, sans-serif;
    font-weight: 750; font-size: calc(26px * var(--inspector-brand-scale)); line-height: 1; letter-spacing: -.035em;
    white-space: nowrap; background: linear-gradient(135deg,#6d36d9,#b58aff);
    background-clip: text; -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.header-dark .inspector-brand .inspector-brand__word,
.inspector-brand--dark .inspector-brand__word {
    background-image: linear-gradient(135deg,#fff,rgba(255,255,255,.75));
}
@media (max-width: 768px) {
    .header-premium .container { padding-left: 16px; padding-right: 16px; }
    .header-premium .header-inner { gap: 12px; }
    .inspector-brand .inspector-brand__mark { width: calc(66px * var(--inspector-brand-scale)); height: calc(29.5px * var(--inspector-brand-scale)); }
    .inspector-brand .inspector-brand__word { font-size: calc(21px * var(--inspector-brand-scale)); }
    .home .bim-scroll-hero__intro { padding-top: 82px; }
}