/* Основные стили */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #7c3aed;
    --dark: #1e293b;
    --light: #f8fafc;
    --gray: #64748b;
    --light-gray: #e2e8f0;
    --success: #10b981;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', system-ui, sans-serif;
}

body {
    line-height: 1.6;
    color: var(--dark);
    background-color: #ffffff;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 80px 0;
}

h1, h2, h3 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

h1 {
    font-size: 3.5rem;
}

h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
}

h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1.5rem;
    color: var(--gray);
    font-size: 1.1rem;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    background-color: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    text-align: center;
}

.btn:hover {
    background-color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(37, 99, 235, 0.2);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-secondary:hover {
    background-color: rgba(37, 99, 235, 0.05);
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--gray);
    max-width: 800px;
    margin: 0 auto 3rem;
    text-align: center;
}

/* Стили для шапки с логотипом */
.header {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px 0;
    z-index: 100;
    background: transparent;
}

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

/* Стили для логотипа */
.logo {
    font-size: 2.4rem;
    font-weight: 800;
    letter-spacing: 1px;
    display: inline-block;
    text-decoration: underline;
    text-underline-offset: 8px;
    text-decoration-thickness: 3px;
    text-decoration-color: var(--primary); /* Подчеркивание синим цветом */
}

.logo-sozh {
    color: var(--primary);
}

.logo-dev {
    color: var(--gray);
}

/* Навигация в шапке (опционально) */
.nav-menu {
    display: flex;
    gap: 30px;
}

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

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

/* Для hero секции с учетом абсолютного header */
.hero {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    padding: 140px 0 100px; /* Увеличен верхний отступ для header */
    position: relative;
    overflow: hidden;
}

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

.hero-content {
    flex: 1;
    max-width: 700px;
}

.hero h1 {
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2.5rem;
    color: var(--gray);
}

.hero-buttons {
    display: flex;
    gap: 15px;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.hero-features {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 2rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--gray);
}

.feature-item i {
    color: var(--success);
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: flex-end;
}

.hero-image svg {
    width: 100%;
    max-width: 500px;
    height: auto;
}

/* Блок 2: Кому подходим */
.for-whom {
    background-color: var(--light);
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 3rem;
}

.card {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
    border-top: 4px solid var(--primary);
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.card-icon {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 1.5rem;
}

.card h3 {
    margin-bottom: 1rem;
}

.card ul {
    list-style-type: none;
}

.card li {
    margin-bottom: 0.8rem;
    padding-left: 24px;
    position: relative;
}

.card li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
}

.center-btn {
    text-align: center;
}

/* Блок 3: Услуги */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 3rem;
}

.service-card {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--light-gray);
    transition: var(--transition);
}

.service-card:hover {
    border-color: var(--primary);
    transform: translateY(-5px);
}

.service-icon {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 1.5rem;
}

.service-card ul {
    list-style-type: none;
    margin-bottom: 2rem;
}

.service-card li {
    margin-bottom: 0.8rem;
    padding-left: 24px;
    position: relative;
}

.service-card li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
    font-size: 1.5rem;
}

/* Блок 4: Преимущества */
.benefits {
    background-color: var(--light);
}

.benefits-list {
    max-width: 800px;
    margin: 0 auto;
}

.benefit-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 2rem;
    padding: 20px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.03);
}

.benefit-icon {
    font-size: 1.5rem;
    color: var(--primary);
    margin-right: 20px;
    margin-top: 5px;
}

/* Блок 5: Как работаем */
.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-bottom: 3rem;
}

.step {
    text-align: center;
    padding: 30px 20px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    position: relative;
}

.step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background-color: var(--primary);
    color: white;
    border-radius: 50%;
    font-weight: bold;
    font-size: 1.5rem;
    margin: 0 auto 1.5rem;
}

/* Блок 6: Форматы сотрудничества */
.cooperation-formats {
    background-color: var(--light);
}

/* Блок 7: Опыт и домены */
.domains-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    margin-bottom: 3rem;
}

.domain-tag {
    padding: 12px 25px;
    background-color: white;
    border: 2px solid var(--light-gray);
    border-radius: 50px;
    font-weight: 600;
    color: var(--dark);
    transition: var(--transition);
}

.domain-tag:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-3px);
}

/* Блок 8: CTA */
.cta {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    text-align: center;
    padding: 100px 0;
}

.cta h2 {
    color: white;
    margin-bottom: 1.5rem;
}

.cta p {
    color: rgba(255, 255, 255, 0.9);
    max-width: 700px;
    margin: 0 auto 3rem;
    font-size: 1.2rem;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.cta .btn {
    background-color: white;
    color: var(--primary);
}

.cta .btn:hover {
    background-color: var(--light);
}

.cta .btn-secondary {
    background-color: transparent;
    color: white;
    border-color: white;
}

.cta .btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* Блок 9: Футер */
footer {
    background-color: var(--dark);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo .logo {
    color: white;
    margin-bottom: 1rem;
    font-size: 2rem;
}

.footer-logo .logo-sozh,
.footer-logo .logo-dev {
    color: white; /* В футере делаем белым для контраста */
}

.footer-logo .logo {
    text-decoration-color: white; /* Белое подчеркивание в футере */
}

.footer-description {
    color: #94a3b8;
    margin-bottom: 1.5rem;
}

.footer-contacts p {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 1rem;
    color: #94a3b8;
}

.footer-contacts a {
    color: #94a3b8;
    text-decoration: none;
}

.footer-contacts i {
    color: var(--primary);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    color: #94a3b8;
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
}

.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #334155;
    color: #94a3b8;
    font-size: 0.9rem;
}

/* ===== СТИЛИ ДЛЯ ФОРМЫ ОБРАТНОЙ СВЯЗИ ===== */
.contact-form-section {
    background-color: var(--light);
    padding: 80px 0;
}

.contact-form {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    padding: 50px;
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    border-top: 4px solid var(--primary);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
    margin-bottom: 0;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark);
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group .required {
    color: #dc2626;
    margin-left: 3px;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group textarea,
.form-group input[type="file"] {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--light-gray);
    border-radius: 10px;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
    background-color: var(--light);
}

.form-group input[type="text"]:hover,
.form-group input[type="email"]:hover,
.form-group input[type="tel"]:hover,
.form-group textarea:hover,
.form-group input[type="file"]:hover {
    border-color: var(--primary);
    background-color: white;
}

.form-group input[type="text"]:focus,
.form-group input[type="email"]:focus,
.form-group input[type="tel"]:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    background-color: white;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 140px;
}

/* Стилизация поля для файла */
.form-group input[type="file"] {
    padding: 10px;
    background-color: var(--light);
    border: 2px dashed var(--primary);
    cursor: pointer;
}

.form-group input[type="file"]::-webkit-file-upload-button {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    margin-right: 15px;
    transition: var(--transition);
}

.form-group input[type="file"]::-webkit-file-upload-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(37, 99, 235, 0.3);
}

/* Для Firefox */
.form-group input[type="file"]::file-selector-button {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    margin-right: 15px;
    transition: var(--transition);
}

.form-group input[type="file"]::file-selector-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(37, 99, 235, 0.3);
}

.form-hint {
    display: block;
    margin-top: 8px;
    font-size: 0.85rem;
    color: var(--gray);
}

/* Чекбокс */
.checkbox-group {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 30px;
    background: var(--light);
    padding: 15px 20px;
    border-radius: 10px;
}

.checkbox-group input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--primary);
}

.checkbox-group label {
    margin-bottom: 0;
    font-weight: 500;
    text-transform: none;
    letter-spacing: normal;
    font-size: 0.95rem;
}

.privacy-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.privacy-link:hover {
    color: var(--secondary);
    text-decoration: underline;
}

/* Кнопка отправки */
.submit-btn {
    width: 100%;
    padding: 16px 30px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 5px 15px rgba(37, 99, 235, 0.3);
    text-transform: uppercase;
}

.submit-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.4);
    background: linear-gradient(135deg, var(--primary-dark), #6d28d9);
}

.submit-btn:active {
    transform: translateY(0);
}

/* Сообщения об ошибках/успехе */
.form-message {
    padding: 16px 20px;
    border-radius: 12px;
    margin-bottom: 30px;
    font-weight: 600;
    text-align: center;
    animation: slideIn 0.3s ease;
}

.form-message.success {
    background: #d4edda;
    color: #155724;
    border: 2px solid #c3e6cb;
}

.form-message.error {
    background: #f8d7da;
    color: #721c24;
    border: 2px solid #f5c6cb;
}

/* Анимация для сообщений */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Стили для полей с ошибками */
.form-group.error input,
.form-group.error textarea {
    border-color: #dc2626;
    background-color: #fff5f5;
}

.form-group .error-message {
    color: #dc2626;
    font-size: 0.85rem;
    margin-top: 5px;
    font-weight: 500;
}

/* Адаптивность для формы */
@media (max-width: 768px) {
    .contact-form {
        padding: 30px 20px;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .form-group input[type="file"]::-webkit-file-upload-button {
        display: block;
        margin: 0 auto 10px;
        width: 100%;
    }

    .checkbox-group {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .submit-btn {
        font-size: 1rem;
        padding: 14px 20px;
    }
}

@media (max-width: 480px) {
    .contact-form {
        padding: 20px 15px;
    }

    .form-group label {
        font-size: 0.9rem;
    }

    .form-group input[type="text"],
    .form-group input[type="email"],
    .form-group input[type="tel"],
    .form-group textarea {
        padding: 12px 15px;
    }
}

/* Дополнительные улучшения для формы */
.contact-form-section h2 {
    margin-bottom: 1rem;
}

.contact-form-section .section-subtitle {
    margin-bottom: 3rem;
    font-size: 1.2rem;
}

/* Стилизация placeholder */
.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--gray);
    opacity: 0.7;
    font-size: 0.95rem;
}

/* Фокус на всей форме */
.contact-form:focus-within {
    box-shadow: 0 20px 40px rgba(37, 99, 235, 0.15);
}

/* Анимация появления формы */
.contact-form {
    animation: fadeInUp 0.6s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Стили для иконок в полях (если захотите добавить) */
.form-group.with-icon {
    position: relative;
}

.form-group.with-icon input {
    padding-left: 45px;
}

.form-group.with-icon i {
    position: absolute;
    left: 18px;
    top: 45px;
    color: var(--gray);
    font-size: 1.2rem;
}

/* Стили для disabled состояния */
.form-group input:disabled,
.form-group textarea:disabled {
    background-color: var(--light-gray);
    cursor: not-allowed;
    opacity: 0.7;
}

/* Индикатор загрузки файла */
.file-upload-info {
    margin-top: 8px;
    font-size: 0.85rem;
    color: var(--success);
    display: flex;
    align-items: center;
    gap: 5px;
}

.file-upload-info i {
    font-size: 1rem;
}

/* Стили для счетчика символов в textarea */
.char-counter {
    text-align: right;
    font-size: 0.8rem;
    color: var(--gray);
    margin-top: 5px;
}

.char-counter.warning {
    color: #f59e0b;
}

.char-counter.danger {
    color: #dc2626;
}

/* Адаптивность */
@media (max-width: 992px) {
    h1 {
        font-size: 2.8rem;
    }

    h2 {
        font-size: 2.2rem;
    }

    .hero .container {
        flex-direction: column;
        text-align: center;
    }

    .hero-content {
        margin-bottom: 50px;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-features {
        justify-content: center;
    }

    .nav-menu {
        display: none; /* На мобильных скрываем меню */
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.3rem;
    }

    h2 {
        font-size: 1.9rem;
    }

    h3 {
        font-size: 1.5rem;
    }

    section {
        padding: 60px 0;
    }

    .hero {
        padding: 120px 0 80px; /* Уменьшаем отступы для мобильных */
    }

    .cta {
        padding: 80px 0;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

    .logo {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .cards-grid, .services-grid, .process-steps {
        grid-template-columns: 1fr;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
}

/* Стили для модального окна с сообщением */
.form-message-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    animation: fadeIn 0.3s ease;
}

.form-message-modal {
    background: white;
    padding: 40px;
    border-radius: 20px;
    max-width: 400px;
    width: 90%;
    text-align: center;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    animation: slideInUp 0.4s ease;
    border-top: 4px solid var(--primary);
}

.form-message-modal.success {
    border-top-color: var(--success);
}

.form-message-modal.error {
    border-top-color: #dc2626;
}

.modal-icon {
    font-size: 4rem;
    margin-bottom: 20px;
}

.form-message-modal.success .modal-icon i {
    color: var(--success);
}

.form-message-modal.error .modal-icon i {
    color: #dc2626;
}

.form-message-modal p {
    font-size: 1.1rem;
    margin-bottom: 25px;
    color: var(--dark);
    line-height: 1.5;
}

.modal-close-btn {
    padding: 12px 40px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 5px 15px rgba(37, 99, 235, 0.3);
}

.modal-close-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.4);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Для мобильных устройств */
@media (max-width: 480px) {
    .form-message-modal {
        padding: 30px 20px;
    }
    
    .modal-icon {
        font-size: 3rem;
    }
    
    .form-message-modal p {
        font-size: 1rem;
    }
}