/* Основные переменные */
:root {
    --bg-primary: #0a192f;
    --bg-secondary: #112240;
    --bg-tertiary: #1e3a5f;
    --accent-primary: #4cc9f0;
    --accent-secondary: #3a86ff;
    --text-primary: #ffffff;
    --text-secondary: #8892b0;
    --success: #00c853;
    --warning: #ffc107;
    --danger: #ff5252;
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Montserrat', 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--accent-secondary);
}

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

/* Хедер */
.header {
    background-color: var(--bg-secondary);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.header__content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header__logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.header__logo span {
    color: var(--accent-primary);
}

.header__nav {
    display: flex;
    gap: 2rem;
}

.header__nav a {
    color: var(--text-secondary);
    font-weight: 500;
}

.header__nav a:hover,
.header__nav a.active {
    color: var(--accent-primary);
}

.header__contact {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header__phone {
    font-weight: 600;
    color: var(--text-primary);
}

/* Герой секция */
.hero {
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-tertiary) 100%);
    padding: 6rem 0;
    text-align: center;
}

.hero__title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.hero__title span {
    color: var(--accent-primary);
}

.hero__subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero__btn {
    display: inline-block;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--bg-primary);
    font-weight: 600;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.hero__btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(76, 201, 240, 0.3);
    color: var(--bg-primary);
}

/* Секция */
.section {
    padding: 4rem 0;
}

.section__title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
}

.section__title span {
    color: var(--accent-primary);
}

/* Услуги */
.services {
    background-color: var(--bg-secondary);
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.services__card {
    background-color: var(--bg-tertiary);
    padding: 2rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.services__card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.services__icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.services__title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.services__description {
    color: var(--text-secondary);
}

/* Портфолио */
.portfolio__filters {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.portfolio__filter {
    padding: 0.5rem 1.5rem;
    background-color: var(--bg-secondary);
    border: 2px solid var(--accent-primary);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
}

.portfolio__filter:hover,
.portfolio__filter.active {
    background-color: var(--accent-primary);
    color: var(--bg-primary);
}

.portfolio__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.portfolio__item {
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
}

.portfolio__item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.portfolio__item {
    text-decoration: none;
    color: inherit;
    display: block;
}

.portfolio__image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.portfolio__content {
    padding: 1.5rem;
}

.portfolio__title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.portfolio__category {
    color: var(--accent-primary);
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.portfolio__description {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Форма */
.form {
    background-color: var(--bg-secondary);
    padding: 2rem;
    border-radius: var(--border-radius);
    max-width: 500px;
    margin: 0 auto;
}

.form__group {
    margin-bottom: 1.5rem;
}

.form__label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form__input,
.form__textarea {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--bg-tertiary);
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-family: inherit;
    transition: var(--transition);
}

.form__input:focus,
.form__textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.form__textarea {
    min-height: 120px;
    resize: vertical;
}

.form__file {
    position: relative;
    overflow: hidden;
    display: inline-block;
}

.form__file input[type="file"] {
    position: absolute;
    left: 0;
    top: 0;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.form__file-label {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: var(--bg-tertiary);
    border: 2px dashed var(--accent-primary);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.form__file-label:hover {
    background-color: var(--accent-primary);
    color: var(--bg-primary);
}

.form__checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form__checkbox input {
    width: auto;
}

.form__checkbox label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.form__btn {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border: none;
    border-radius: var(--border-radius);
    color: var(--bg-primary);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
}

.form__btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(76, 201, 240, 0.3);
}

.form__btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Отзывы */
.reviews {
    background-color: var(--bg-secondary);
}

.reviews__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.reviews__card {
    background-color: var(--bg-tertiary);
    padding: 1.5rem;
    border-radius: var(--border-radius);
}

.reviews__header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.reviews__avatar {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
}

.reviews__name {
    font-weight: 600;
}

.reviews__rating {
    color: var(--warning);
}

.reviews__text {
    color: var(--text-secondary);
}

/* Преимущества */
.advantages {
    background-color: var(--bg-tertiary);
}

.advantages__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.advantages__item {
    text-align: center;
}

.advantages__icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.advantages__title {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.advantages__text {
    color: var(--text-secondary);
}

/* Футер */
.footer {
    background-color: var(--bg-secondary);
    padding: 3rem 0 1.5rem;
    margin-top: auto;
}

.footer__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer__title {
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--accent-primary);
}

.footer__links {
    list-style: none;
}

.footer__links li {
    margin-bottom: 0.5rem;
}

.footer__links a {
    color: var(--text-secondary);
}

.footer__links a:hover {
    color: var(--accent-primary);
}

.footer__contact-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
}

.footer__bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--bg-tertiary);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Модальное окно */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal.active {
    display: flex;
}

.modal__content {
    background-color: var(--bg-secondary);
    padding: 2rem;
    border-radius: var(--border-radius);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal__close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
}

/* Уведомления */
.alert {
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
}

.alert--success {
    background-color: rgba(0, 200, 83, 0.2);
    border: 1px solid var(--success);
    color: var(--success);
}

.alert--error {
    background-color: rgba(255, 82, 82, 0.2);
    border: 1px solid var(--danger);
    color: var(--danger);
}

/* Адаптивность */
@media (max-width: 768px) {
    .hero__title {
        font-size: 2rem;
    }
    
    .header__nav {
        display: none;
    }
    
    .section {
        padding: 3rem 0;
    }
}