:root {
    --primary-color: #4f46e5;
    --primary-dark: #4338ca;
    --secondary-color: #10b981;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --white: #ffffff;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header__desktop {
    display: none;
}

@media (min-width: 768px) {
    .header__desktop {
        display: block;
    }
    .header__mobile {
        display: none;
    }
}

.header__container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

/* Логотип */
.header__logo a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1.25rem;
}

.header__logo-icon {
    width: 32px;
    height: 32px;
    animation: rotateLogo 20s linear infinite;
}

@keyframes rotateLogo {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Поиск */
.header__search {
    flex: 1;
    max-width: 400px;
}

.search-form__wrapper {
    display: flex;
    position: relative;
}

.search-form__input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: var(--transition);
}

.search-form__input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.search-form__button {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.search-form__icon {
    width: 20px;
    height: 20px;
    color: var(--text-light);
    transition: var(--transition);
}

.search-form__button:hover .search-form__icon {
    color: var(--primary-color);
}

/* Десктопное меню */
.nav-menu {
    display: flex;
    list-style: none;
    gap: 1.5rem;
}

.nav-menu__link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 0;
}

.nav-menu__link:hover {
    color: var(--primary-color);
}

.nav-menu__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

.nav-menu__link:hover::after {
    width: 100%;
}

.nav-menu__item--dropdown {
    position: relative;
}

.nav-menu__dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: var(--white);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    z-index: 100;
}

.nav-menu__item--dropdown:hover .nav-menu__dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-menu__dropdown li {
    position: relative;
}

.nav-menu__dropdown a {
    display: block;
    padding: 0.75rem 1rem;
    text-decoration: none;
    color: var(--text-dark);
    transition: var(--transition);
}

.nav-menu__dropdown a:hover {
    background: var(--bg-light);
    color: var(--primary-color);
    padding-left: 1.5rem;
}

.nav-menu__submenu {
    position: relative;
}

.nav-menu__subdropdown {
    position: absolute;
    left: 100%;
    top: 0;
    min-width: 200px;
    background: var(--white);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateX(10px);
    transition: var(--transition);
}

.nav-menu__submenu:hover .nav-menu__subdropdown {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

/* Профиль пользователя */
.user-menu {
    position: relative;
}

.user-menu__button {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    color: var(--text-dark);
    font-size: 1rem;
}

.user-menu__icon {
    width: 24px;
    height: 24px;
}

.user-menu__dropdown {
    position: absolute;
    right: 0;
    top: 100%;
    min-width: 200px;
    background: var(--white);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    z-index: 100;
}

.user-menu:hover .user-menu__dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-menu__link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    text-decoration: none;
    color: var(--text-dark);
    transition: var(--transition);
}

.user-menu__link svg {
    width: 18px;
    height: 18px;
}

.user-menu__link:hover {
    background: var(--bg-light);
    color: var(--primary-color);
}

.user-menu__link--logout {
    color: #ef4444;
}

.user-menu__link--logout:hover {
    background: #fee2e2;
    color: #dc2626;
}

.auth-buttons {
    display: flex;
    gap: 1rem;
}

.auth-buttons__login {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition);
}

.auth-buttons__register {
    text-decoration: none;
    background: var(--primary-color);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-weight: 500;
    transition: var(--transition);
}

.auth-buttons__register:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* Мобильная версия */
.header__mobile {
    display: block;
}

@media (min-width: 768px) {
    .header__mobile {
        display: none;
    }
}

.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-around;
    padding: 0.5rem;
    z-index: 1000;
}

.bottom-nav__item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    background: none;
    border: none;
    color: var(--text-light);
    text-decoration: none;
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
}

.bottom-nav__item svg {
    width: 24px;
    height: 24px;
}

.bottom-nav__item:hover,
.bottom-nav__item.active {
    color: var(--primary-color);
}

/* Мобильное меню */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white);
    height: 100vh;
    transform: translateY(-100%);
    transition: transform 0.3s ease;
    z-index: 1001;
    overflow-y: auto;
}

.mobile-menu.active {
    transform: translateY(0);
}

.mobile-menu__header {
    padding: 1rem;
    display: flex;
    justify-content: flex-end;
}

.mobile-menu__close {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu__close svg {
    width: 24px;
    height: 24px;
    color: var(--text-dark);
}

.mobile-nav-list {
    list-style: none;
    padding: 1rem;
}

.mobile-nav-list__item {
    border-bottom: 1px solid #e5e7eb;
}

.mobile-nav-list__item a {
    display: block;
    padding: 1rem;
    text-decoration: none;
    color: var(--text-dark);
    transition: var(--transition);
}

.mobile-nav-list__toggle {
    width: 100%;
    padding: 1rem;
    background: none;
    border: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    font-size: 1rem;
    color: var(--text-dark);
    transition: var(--transition);
}

.mobile-nav-list__toggle svg {
    width: 16px;
    height: 16px;
    transition: transform 0.3s ease;
}

.mobile-nav-list__toggle.active svg {
    transform: rotate(90deg);
}

.mobile-nav-list__submenu {
    list-style: none;
    background: var(--bg-light);
    display: none;
    padding-left: 1rem;
}

.mobile-nav-list__submenu.active {
    display: block;
}

.mobile-nav-list__submenu a {
    padding-left: 2rem;
}

/* Мобильный поиск */
.mobile-search {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white);
    padding: 1rem;
    transform: translateY(-100%);
    transition: transform 0.3s ease;
    z-index: 1002;
    box-shadow: var(--shadow);
}

.mobile-search.active {
    transform: translateY(0);
}

.mobile-search__container {
    display: flex;
    gap: 0.5rem;
}

.mobile-search__form {
    flex: 1;
    display: flex;
    gap: 0.5rem;
}

.mobile-search__input {
    flex: 1;
    padding: 0.75rem;
    border: 2px solid #e5e7eb;
    border-radius: 0.5rem;
    font-size: 1rem;
}

.mobile-search__input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.mobile-search__button {
    padding: 0.75rem 1.5rem;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: var(--transition);
}

.mobile-search__button:hover {
    background: var(--primary-dark);
}

.mobile-search__close {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-search__close svg {
    width: 24px;
    height: 24px;
    color: var(--text-dark);
}