:root {
    --primary-color: #4f46e5;
    --secondary-color: #7c3aed;
    --accent-color: #10b981;
    --light-color: #f9fafb;
    --dark-color: #111827;
    --gray-color: #6b7280;
    --border-color: #e5e7eb;
    --shadow-color: rgba(0, 0, 0, 0.05);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: var(--light-color);
}

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

/* Header */
.header {
    background-color: white;
    box-shadow: 0 2px 10px var(--shadow-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header__inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary-color);
    text-decoration: none;
}

.logo__icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
}

.nav {
    display: flex;
    gap: 20px;
}

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

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

.language-selector {
    position: relative;
}

.language-selector__button {
    background: none;
    border: none;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    color: var(--dark-color);
}

.language-selector__dropdown {
    position: absolute;
    right: 0;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 4px 12px var(--shadow-color);
    min-width: 100px;
    display: none;
    z-index: 10;
}

.language-selector__dropdown.show {
    display: block;
}

.language-selector__option {
    padding: 10px 15px;
    cursor: pointer;
    transition: var(--transition);
}

.language-selector__option:hover {
    background-color: var(--primary-color);
    color: white;
}

/* Hero Section */
.hero {
    padding: 60px 0 40px;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4ecf7 100%);
    text-align: center;
}

.hero__title {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.hero__subtitle {
    font-size: 1.1rem;
    color: var(--gray-color);
    margin-bottom: 30px;
}

.search-form {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

.search-form__input {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
}

.search-form__input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.search-form__button {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--gray-color);
    transition: var(--transition);
}

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

/* Categories */
.categories {
    padding: 40px 0;
}

.categories__title {
    text-align: center;
    margin-bottom: 30px;
    font-size: 2rem;
}

.categories__list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.category-item {
    padding: 10px 15px;
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    text-decoration: none;
}

.category-item:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.category-item__icon {
    font-size: 1.2rem;
}

/* Tools Grid */
.tools-grid {
    padding: 40px 0;
}

.tools-grid__title {
    text-align: center;
    margin-bottom: 30px;
    font-size: 2rem;
}

.tools-grid__container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.tool-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 12px var(--shadow-color);
    transition: var(--transition);
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px var(--shadow-color);
}

.tool-card__header {
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.tool-card__icon {
    width: 30px;
    height: 30px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 0.8rem;
}

.tool-card__title {
    font-weight: 600;
    font-size: 1.1rem;
}

.tool-card__content {
    padding: 20px;
}

.tool-card__list {
    list-style: none;
    margin-bottom: 20px;
}

.tool-card__item a {
    text-decoration: none;
}
.tool-card__item {
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.tool-card__item:last-child {
    border-bottom: none;
}

.tool-card__item-number {
    font-weight: bold;
    color: var(--primary-color);
    min-width: 20px;
}

.tool-card__footer {
    padding: 15px 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.tool-card__link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.tool-card__link:hover {
    text-decoration: underline;
}

.view-all-button {
    display: block;
    margin: 30px auto;
    padding: 12px 24px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    text-align: center;
    width: 250px;
}

.view-all-button:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.3);
}

/* Features Section */
.features {
    padding: 60px 0;
    background-color: white;
}

.features__title {
    text-align: center;
    margin-bottom: 40px;
    font-size: 2rem;
}

.features__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--light-color);
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 4px 12px var(--shadow-color);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px var(--shadow-color);
}

.feature-card__icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.feature-card__title {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.feature-card__list {
    list-style: none;
}

.feature-card__item {
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

.feature-card__item a {
    text-decoration: none;
}

.feature-card__item:last-child {
    border-bottom: none;
}

.feature-card__footer {
    margin-top: 20px;
    text-align: center;
}

.feature-card__button {
    display: inline-block;
    padding: 8px 16px;
    background: var(--primary-color);
    color: white;
    border-radius: 20px;
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.feature-card__button:hover {
    background: var(--secondary-color);
}

/* Courses Section */
.courses {
    padding: 60px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4ecf7 100%);
}

.courses__title {
    text-align: center;
    margin-bottom: 40px;
    font-size: 2rem;
}

.courses__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.course-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 12px var(--shadow-color);
    transition: var(--transition);
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px var(--shadow-color);
}

.course-card__image {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.course-card__content {
    padding: 20px;
}

.course-card__tags {
    display: flex;
    gap: 8px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.course-card__tag {
    padding: 4px 8px;
    background: var(--light-color);
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--gray-color);
    text-decoration: none;
}

.course-card__title {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.course-card__price {
    color: var(--gray-color);
    margin-bottom: 20px;
    font-weight: 500;
}

.course-card__button {
    display: block;
    width: 100%;
    padding: 12px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    transition: var(--transition);
}

.course-card__button:hover {
    background: linear-gradient(45deg, var(--secondary-color), var(--primary-color));
}

/* About Section */
.about {
    padding: 60px 0;
}

.about__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    align-items: center;
}

.about__content {
    padding-right: 30px;
}

.about__title {
    font-size: 2rem;
    margin-bottom: 20px;
}

.about__text {
    margin-bottom: 20px;
    line-height: 1.8;
}

.about__image {
    width: 100%;
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 8px 24px var(--shadow-color);
}

/* Footer */
.footer {
    background: var(--dark-color);
    color: white;
    padding: 60px 0 30px;
}

.footer__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer__column {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.5rem;
    color: white;
    margin-bottom: 20px;
}

.footer__logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
}

.footer__title {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: white;
}

.footer__link {
    color: #9ca3af;
    text-decoration: none;
    transition: var(--transition);
}

.footer__link:hover {
    color: white;
    text-decoration: underline;
}

.footer__social {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.footer__social-icon {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: var(--transition);
}

.footer__social-icon:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

.footer__copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #9ca3af;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header__inner {
        flex-direction: column;
        gap: 20px;
    }
    
    .nav {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero__title {
        font-size: 2rem;
    }
    
    .categories__title,
    .tools-grid__title,
    .features__title,
    .courses__title,
    .about__title {
        font-size: 1.5rem;
    }
    
    .tool-card__title {
        font-size: 1rem;
    }
    
    .course-card__title {
        font-size: 1.1rem;
    }
    
    .about__content {
        padding-right: 0;
    }
    
    .footer__grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 40px 0 20px;
    }
    
    .search-form__input {
        padding: 12px 15px;
    }
    
    .tool-card__item-number {
        min-width: 15px;
        font-size: 0.9rem;
    }
    
    .course-card__image {
        height: 150px;
    }
}


/* Search and Filters */
.search-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 30px;
    padding: 20px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 4px 12px var(--shadow-color);
}

.search-bar {
    flex: 1;
    min-width: 200px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.search-bar__input {
    flex: 1;
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
}

.search-bar__input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.search-bar__icon {
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    cursor: pointer;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    min-width: 200px;
}

.filter-select {
    flex: 1;
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
    background: white;
}

.filter-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.filter-button {
    padding: 12px 20px;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.filter-button:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

    /* Tools Grid */
    .item-tools-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 20px;
        margin-bottom: 40px;
    }

    .item-tool-card {
        background: white;
        border-radius: 15px;
        overflow: hidden;
        box-shadow: 0 4px 12px var(--shadow-color);
        transition: var(--transition);
    }

    .item-tool-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 8px 20px var(--shadow-color);
    }

    .item-tool-card__header {
        padding: 20px;
        display: flex;
        align-items: center;
        gap: 15px;
        border-bottom: 1px solid var(--border-color);
    }

    .item-tool-card__icon {
        width: 50px;
        height: 50px;
        border-radius: 10px;
        overflow: hidden;
        display: flex;
        align-items: center;
        justify-content: center;
        background: var(--light-color);
    }

    .item-tool-card__icon img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }

    .item-tool-card__title {
        font-size: 1.3rem;
        margin-bottom: 5px;
        color: var(--dark-color);
    }

    .item-tool-card__tags {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        margin-bottom: 15px;
    }

    .item-tool-card__tag {
        padding: 4px 8px;
        background: rgba(79, 70, 229, 0.1);
        border-radius: 20px;
        font-size: 0.8rem;
        color: var(--primary-color);
    }

    .item-tool-card__content {
        color: var(--gray-color);
        font-size: 0.9rem;
        line-height: 1.4;
        padding: 10px 20px;
    }

    .item-tool-card__footer {
        padding: 20px;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .item-tool-card__action {
        padding: 8px 16px;
        background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
        color: white;
        border-radius: 50px;
        font-weight: 500;
        cursor: pointer;
        text-decoration: none;
        transition: var(--transition);
        font-size: 0.9rem;
    }

    .item-tool-card__action:hover {
        transform: translateY(-2px);
    }

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 5px;
    padding: 30px 0;
}

.pagination__info {
    font-size: 0.9rem;
    color: var(--gray-color);
}

.pagination__button {
    padding: 8px 12px;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.pagination__button:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.pagination__button--active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.pagination__ellipsis {
    padding: 8px 12px;
    color: var(--gray-color);
}

.main-content {
    padding: 40px 0;
}

.page-header {
    margin-bottom: 40px;
    text-align: center;
}

.page-header__title {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: var(--dark-color);
}

.page-header__subtitle {
    color: var(--gray-color);
    margin-bottom: 20px;
}