/* ========== HEADER STYLES ========== */

.site-header {
    top: 0;
    background: linear-gradient(135deg, var(--header-bg-start) 0%, var(--header-bg-middle) 50%, var(--header-bg-end) 100%);
    /*position: relative;*/
    position: sticky;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--header-container-padding);
    max-width: 1200px;
    margin: 0 auto;
}

.header-branding {
    flex: 0 1 auto;
}

.logo-wrapper {
    display: flex;
    align-items: center;
    gap: 25px;
    flex-wrap: wrap;
}

.logo-new img {
    height: var(--header-logo-susu-size);
    width: auto;
    transition: transform 0.3s ease;
    border-radius: 10px;
}

.logo-university img {
    height: var(--header-logo-isit-size);
    width: auto;
    transition: transform 0.3s ease;
    border-radius: 30px;
}

.logo-new:hover img,
.logo-university:hover img {
    transform: scale(1.05);
}

.site-identity {
    display: flex;
    flex-direction: column;
}

.site-title {
    margin: 0;
    font-size: var(--header-site-title-size);
    font-weight: 700;
    line-height: 1.2;
    color: var(--white);
}

.site-title a {
    color: var(--white);
    text-decoration: none;
    transition: color 0.3s ease;
}

.site-title a:hover {
    color: var(--light-blue);
}

.site-description {
    margin: 3px 0 0;
    font-size: var(--header-site-desc-size);
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.3;
}

.university-name {
    font-size: var(--header-university-size);
    color: rgba(255, 255, 255, 0.7);
}

.main-navigation {
    display: flex;
    align-items: center;
    gap: 25px;
    position: relative;
}

.primary-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 5px;
}

.primary-menu > li {
    position: relative;
}

.primary-menu > li > a {
    display: block;
    padding: 12px 18px;
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--header-menu-size);
    border-radius: 6px;
    transition: all 0.3s ease;
    position: relative;
}

.primary-menu > li > a:hover {
    color: var(--white);
    background-color: var(--header-text-hover-bg);
}

.primary-menu > li.current-menu-item > a,
.primary-menu > li.current-page-ancestor > a {
    color: var(--white);
    font-weight: 600;
    background-color: rgba(255, 255, 255, 0.1);
}

.primary-menu > li.current-menu-item > a::after {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 18px;
    right: 18px;
    height: 2px;
    background-color: var(--white);
    border-radius: 2px;
}

.primary-menu .sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--primary-blue);
    min-width: 220px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    border-radius: 8px;
    padding: 10px 0;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    z-index: 100;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.primary-menu li:hover > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.primary-menu .sub-menu a {
    padding: 10px 20px;
    color: rgba(255, 255, 255, 0.9);
    display: block;
    transition: all 0.2s ease;
}

.primary-menu .sub-menu a:hover {
    background-color: rgba(255, 255, 255, 0.15);
    color: var(--white);
    padding-left: 25px;
}

.header-cta {
    margin-left: 10px;
}

.cta-button {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--header-cta-bg-start), var(--header-cta-bg-end));
    color: var(--header-cta-text-color);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: var(--header-cta-size);
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
    border: none;
    cursor: pointer;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(255, 107, 53, 0.4);
    background: linear-gradient(135deg, #FF7B45, #FF6B35);
    color: var(--header-cta-text-color);
}

.cta-icon {
    font-size: 1.5rem;
}

.header-search {
    position: relative;
}

.search-toggle {
    background: var(--header-search-bg);
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--white);
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    width: 36px;
    height: 36px;
}

.search-toggle:hover {
    color: var(--white);
    background-color: var(--header-search-hover-bg);
}

.search-form-container {
    position: absolute;
    top: 100%;
    right: 0;
    width: 300px;
    background: var(--primary-blue);
    padding: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    border-radius: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    z-index: 200;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.search-toggle:focus + .search-form-container,
.search-form-container:hover {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.header-notice {
    background-color: var(--header-notice-bg);
    padding: 8px 0;
    text-align: center;
    font-size: var(--header-notice-size);
}

.header-notice span {
    color: var(--header-notice-text);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 6px;
}

.hamburger-line {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--white);
    margin: 3px 0;
    transition: all 0.3s ease;
    border-radius: 2px;
}

.breadcrumbs-container {
    background: linear-gradient(135deg, var(--breadcrumbs-bg-start) 0%, var(--breadcrumbs-bg-middle) 50%, var(--breadcrumbs-bg-end) 100%);
    padding: 0 0 15px 0;
}

.breadcrumbs {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.breadcrumbs-nav {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.breadcrumbs-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.breadcrumbs-link {
    color: var(--breadcrumbs-link);
    text-decoration: none;
    font-size: var(--breadcrumbs-link-size);
    font-weight: 500;
    padding: 6px 12px;
    border-radius: 6px;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.breadcrumbs-link:hover {
    color: var(--breadcrumbs-hover-text);
    background-color: var(--breadcrumbs-hover-bg);
    transform: translateY(-1px);
}

.breadcrumbs-separator {
    color: rgba(255, 255, 255, 0.5);
    font-size: var(--breadcrumbs-separator-size);
    user-select: none;
}

.breadcrumbs-current {
    color: var(--white);
    font-size: 1.5rem;
    font-weight: 600;
    padding: 6px 12px;
    background-color: rgba(255, 255, 255, 0.15);
    border-radius: 6px;
    border-left: 3px solid var(--header-cta-bg-start);
}

/* Адаптивность */
@media (max-width: 900px) {
    .primary-menu > li > a {
        padding: 10px 14px;
        font-size: var(--header-mobile-menu-size);
    }

    .cta-text {
        display: none;
    }

    .cta-button {
        padding: 10px 15px;
        min-width: auto;
    }

    .cta-icon {
        margin: 0;
        font-size: var(--header-mobile-cta-size);
    }
}

@media (max-width: 900px) {
    .menu-toggle {
        display: flex;
        order: 2;
    }

    .primary-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 300px;
        height: 100vh;
        background: var(--primary-blue);
        flex-direction: column;
        padding: 80px 20px 30px;
        box-shadow: -5px 0 25px rgba(0, 0, 0, 0.2);
        transition: right 0.4s ease;
        overflow-y: auto;
        z-index: 999;
    }

    .primary-menu.active {
        right: 0;
    }

    .primary-menu > li {
        width: 100%;
    }

    .primary-menu > li > a {
        padding: 15px;
        border-radius: 6px;
        margin-bottom: 5px;
        color: white;
    }

    .primary-menu .sub-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        padding-left: 15px;
        background: rgba(255, 255, 255, 0.05);
        border-radius: 6px;
        margin-top: 5px;
        display: none;
    }

    .primary-menu .sub-menu.active {
        display: block;
    }

    .primary-menu .sub-menu a {
        padding: 10px 15px;
        color: rgba(255, 255, 255, 0.9);
    }

    .menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .header-search .search-form-container {
        display: none;
    }

    .mobile-search-container {
        display: block;
        padding: 15px 20px;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
    }

    .header-cta {
        order: 1;
        margin-left: 0;
    }
}

@media (max-width: 600px) {
    .header-container {
        padding: 12px 16px !important;
        flex-wrap: nowrap;
        gap: 12px;
    }

    .logo-wrapper {
        gap: 10px;
        flex: 1;
        min-width: 0;
    }

    .logo-university img {
        height: var(--header-logo-isit-size-mobile);
        width: auto;
    }

    .logo-new img {
        height: var(--header-logo-susu-size-mobile);
        width: auto;
    }

    .site-title {
        font-size: var(--header-mobile-site-title-size);
        line-height: 1.2;
        white-space: nowrap;
    }

    .site-description {
        display: none;
    }

    .cta-button {
        padding: 8px 12px;
    }
}

header.site-header {
    color: white;
}

@media (max-width: 768px) {
    .breadcrumbs-container {
        padding: 0 0 8px 0;
    }

    .breadcrumbs {
        padding: 0 12px;
    }

    .breadcrumbs-link,
    .breadcrumbs-current {
        font-size: var(--breadcrumbs-link-size-mobile);
        padding: 4px 8px;
        white-space: nowrap;
    }

    .breadcrumbs-nav {
        gap: 4px;
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 4px;
        -webkit-overflow-scrolling: touch;
    }

    .breadcrumbs-separator {
        font-size: var(--breadcrumbs-separator-size);
        margin: 0 0;
    }
}

@media (max-width: 600px) {
    .site-description {
        display: none !important;
    }
}

/* ========== ПЛАНШЕТЫ (600px - 900px) ========== */
@media (min-width: 601px) and (max-width: 900px) {
    /* Показываем описание, но делаем компактнее */
    .site-description {
        display: block !important;  /* Возвращаем на планшетах */
        font-size: 1rem !important;  /* Уменьшаем шрифт */
        line-height: 1.2 !important;
    }
    
    /* Название университета на планшетах — компактно */
    .university-name {
        font-size: 0.9rem !important;
        display: inline-block !important;
    }
    
    /* Хлебные крошки — более компактные */
    .breadcrumbs-nav {
        gap: 4px !important;
        flex-wrap: wrap !important;
        justify-content: center !important;
    }
    
    .breadcrumbs-link {
        font-size: 1.2rem !important;
        padding: 4px 8px !important;
        white-space: nowrap !important;
    }
    
    .breadcrumbs-separator {
        font-size: 1rem !important;
    }
    
    /* Отступы контейнера на планшетах */
    .header-container {
        padding: 12px 16px !important;
        gap: 15px !important;
    }
    
    /* Логотипы на планшетах — средний размер */
    .logo-new img {
        height: 65px !important;
    }
    
    .logo-university img {
        height: 55px !important;
    }
    
    /* Заголовок кафедры на планшетах */
    .site-title {
        font-size: 1.4rem !important;
        white-space: nowrap !important;
    }
    
    /* Кнопка CTA на планшетах — полный текст */
    .cta-text {
        display: inline !important;
    }
    
    .cta-button {
        padding: 8px 16px !important;
        font-size: 1.3rem !important;
    }
}