:root {
    --primary: #421d70;
    --secondary: #00005e;
    --accent: #de497a;
    --light: #f5f8fc;
    --dark: #1a2b3c;
    --gray: #6c757d;
    --border: #dee2e6;
}


* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Montserrat, sans-serif;
}

body {
    background-color: #f9f9f9;
    color: var(--dark);
    line-height: 1.6;
}

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

/* Шапка */
header {
    background-image: url(./bg.jpg);
    background-position: bottom;
    background-repeat: no-repeat;
    background-size: cover;
    color: white;
    padding: 65px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.header-content {
    position: relative;
    z-index: 2;
}

.university-logo {
    max-width: 350px;
}

.event-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 10px;
    color: white;
}

.event-subtitle {
    font-size: 1.8rem;
    font-weight: 300;
    margin-bottom: 15px;
    color: rgba(255, 255, 255, 0.9);
}

.event-date {
    font-size: 1.5rem;
    font-weight: 600;
    background-color: rgba(255, 255, 255, 0.15);
    display: inline-block;
    padding: 8px 20px;
    border-radius: 30px;
    margin-bottom: 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.event-cta {
    font-size: 1.3rem;
    font-style: italic;
    max-width: 700px;
    margin: 0 auto 30px;
    color: rgba(255, 255, 255, 0.9);
}

.btn-primary {
    display: inline-block;
    background-color: var(--accent);
    color: white;
    padding: 15px 40px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    box-shadow: 0 5px 15px rgba(204, 51, 51, 0.3);
}

.btn-primary:hover {
    background-color: #b02a2a;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(204, 51, 51, 0.4);
}

/* Основное содержание */
section {
    padding: 60px 0;
}

.section-title {
    text-align: center;
    font-size: 2.2rem;
    margin-bottom: 40px;
    color: var(--primary);
    position: relative;
}

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: var(--gray);
    max-width: 800px;
    margin: 0 auto 40px;
}

/* О форуме */
.about-content {
    background-color: white;
    border-radius: 15px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    margin-bottom: 30px;
}

.about-text {
    font-size: 1.1rem;
    margin-bottom: 30px;
}

.stats {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 40px;
}

.stat-item {
    text-align: center;
    flex: 1;
    min-width: 150px;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.stat-label {
    font-size: 1rem;
    color: var(--gray);
    margin-top: 10px;
}

/* Программа */
.tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 10px;
}

.tab-btn {
    padding: 12px 25px;
    background-color: white;
    border: 2px solid var(--border);
    border-radius: 30px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn:hover {
    border-color: var(--secondary);
    color: var(--secondary);
}

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

.tab-content {
    display: none;
    animation: fadeIn 0.5s;
}

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

.tab-content.active {
    display: block;
}

.program-card {
    background-color: white;
    border-radius: 10px;
    padding: 30px;
    margin-bottom: 20px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    border-left: 5px solid var(--secondary);
}

.program-time {
    display: inline-block;
    background-color: var(--light);
    color: var(--primary);
    padding: 5px 15px;
    border-radius: 20px;
    font-weight: 600;
    margin-bottom: 15px;
}

.program-title {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--primary);
}

.program-location {
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.program-description {
    color: var(--gray);
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background-color: var(--light);
    color: var(--primary);
    padding: 12px 25px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    margin-top: 20px;
    transition: all 0.3s ease;
}

.download-btn:hover {
    background-color: var(--secondary);
    color: white;
}

/* Партнеры */
.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 20px;
    margin-top: 40px;
}

.partner-card {
    background-color: white;
    border-radius: 10px;
    padding: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.partner-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.partner-name {
    font-weight: 600;
    color: var(--dark);
}

.partner-tooltip {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--primary);
    color: white;
    padding: 8px;
    font-size: 0.85rem;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.partner-card:hover .partner-tooltip {
    transform: translateY(0);
}

/* Вакансии */
.jobs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
    margin-top: 40px;
}

.job-card {
    background-color: white;
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border-top: 4px solid var(--secondary);
}

.job-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.job-company {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    color: var(--primary);
    font-weight: 700;
}

.job-company i {
    color: var(--accent);
}

.job-position {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--dark);
}

.job-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 15px;
}

.job-tag {
    background-color: var(--light);
    color: var(--primary);
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 0.85rem;
}

.view-all-btn {
    display: block;
    text-align: center;
    margin-top: 40px;
    color: var(--secondary);
    font-weight: 600;
    text-decoration: none;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

/* Дополнительные возможности */
.opportunities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 40px;
}

.opportunity-card {
    background-color: white;
    border-radius: 10px;
    padding: 25px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.opportunity-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.opportunity-icon {
    font-size: 2.5rem;
    color: var(--secondary);
    margin-bottom: 15px;
}

.opportunity-date {
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Регистрация и контакты */
.registration-section {
    background: linear-gradient(135deg, var(--light) 0%, #e8f0fc 100%);
    border-radius: 15px;
    overflow: hidden;
}

.registration-container {
    display: flex;
    flex-wrap: wrap;
}

.registration-form {
    flex: 1;
    min-width: 300px;
    padding: 40px;
    background-color: white;
}

.form-title {
    font-size: 1.5rem;
    margin-bottom: 25px;
    color: var(--primary);
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark);
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    transition: border 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--secondary);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 10px;
}

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

.hidden {
    display: none;
}

.alert {
    padding: 15px;
    margin-bottom: 15px;
    border-radius: 4px;
}

.alert-success {
    background: #d4edda;
    border: 1px solid #c3e6cb;
    color: #155724;
}

.alert-danger {
    background: #f8d7da;
    border: 1px solid #f5c6cb;
    color: #721c24;
}

.is-invalid {
    border: 1px solid red;
}

.form-group .control-label {
font-weight: 500;
}

.contacts {
    flex: 1;
    min-width: 300px;
    padding: 40px;
    background-color: var(--primary);
    color: white;
}

.contacts-title {
    font-size: 1.5rem;
    margin-bottom: 25px;
    color: white;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 25px;
}

.contact-icon {
    font-size: 1.3rem;
    color: var(--accent);
    flex-shrink: 0;
    margin-top: 5px;
}

.contact-text {
    flex: 1;
}

.contact-link {
    color: white;
    text-decoration: none;
    transition: color 0.3s ease;
    display: block;
    margin-top: 5px;
}

.contact-link:hover {
    color: #a3d5ff;
    text-decoration: underline;
}

/* Подвал */
footer {
    background-color: var(--dark);
    color: rgba(255, 255, 255, 0.8);
    padding: 40px 0;
    text-align: center;
    margin-top: 60px;
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 20px;
}

.footer-link {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.copyright {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 20px;
}

/* Адаптивность */
@media (max-width: 768px) {
    .event-title {
        font-size: 2rem;
    }

    .event-subtitle {
        font-size: 1.5rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .registration-container {
        flex-direction: column;
    }

    .partners-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }

    .jobs-grid,
    .opportunities-grid {
        grid-template-columns: 1fr;
    }
}

/* Уведомление об успешной регистрации */
.notification {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: #4caf50;
    color: white;
    padding: 15px 25px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    z-index: 1000;
    display: none;
    animation: slideIn 0.5s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}