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

:root {
    /* Основные цвета фона */
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-card: rgba(22, 27, 34, 0.85);
    --bg-surface: rgba(33, 38, 45, 0.7);
    
    /* Акцентные цвета */
    --accent-teal: #2ea8cc;
    --accent-gold: #e3b341;
    --accent-wine: #c92a2a;
    --accent-blue: #4493f8;
    --accent-orange: #f68d42;
    --accent-red: #f85149;
    --accent-purple: #a371f7;
    --accent-green: #3fb950;
    --accent-pink: #f778ba;
    
    /* Текст */
    --text-primary: #f0f6fc;
    --text-secondary: #c9d1d9;
    --text-muted: #8b949e;
    
    /* Градиенты */
    --gradient-teal: linear-gradient(135deg, #2ea8cc, #1f6feb);
    --gradient-gold: linear-gradient(135deg, #e3b341, #d29922);
    --gradient-wine: linear-gradient(135deg, #c92a2a, #9e1e63);
    --gradient-blue: linear-gradient(135deg, #4493f8, #1f6feb);
    
    /* Границы */
    --border-color: #30363d;
    --border-hover: #4493f8;
    
    /* Тени */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(68, 147, 248, 0.3);
    
    /* Радиусы */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    
    /* Анимации */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Навигация */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: center; /* Центрируем */
    position: relative;
    min-height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--text-primary);
    position: absolute;
    left: 2rem;
    top: 50%;
    transform: translateY(-50%);
}

.logo-accent {
    color: var(--accent-blue);
}

.nav-menu {
    display: flex;
    gap: 2rem;
    margin: 0 auto; /* Центрируем меню */
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    background-color: var(--bg-surface);
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

.theme-toggle:hover {
    color: var(--text-primary);
    background-color: var(--bg-surface);
}

.mobile-menu-btn {
    display: none; /* Скрыт на десктопе */
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    position: absolute;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
}

.mobile-menu {
    display: none;
    flex-direction: column;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 1rem;
}

.mobile-menu-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    text-decoration: none;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

.mobile-menu-link:hover,
.mobile-menu-link.active {
    color: var(--text-primary);
    background-color: var(--bg-surface);
}

/* Основной контент */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Hero секция */
.hero-section {
    padding: 4rem 0;
    text-align: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto 2rem;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

/* Кнопки */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-base);
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-size: 1rem;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: transparent;
    color: var(--accent-blue);
    border: 1px solid var(--accent-blue);
}

.btn-outline:hover {
    background-color: rgba(68, 147, 248, 0.1);
    transform: translateY(-2px);
}

/* Секции */
.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Таймлайн */
.timeline-section {
    padding: 4rem 0;
}

.timeline-container {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding-left: 2rem;
}

.timeline-line {
    position: absolute;
    left: 0;
    top: 130px;
    bottom: 115px;
    width: 4px;
    background: linear-gradient(to bottom, 
        var(--accent-teal),
        var(--accent-gold),
        var(--accent-wine),
        var(--accent-blue),
        var(--accent-orange),
        var(--accent-red),
        /* var(--accent-purple), */
        var(--accent-green),
        var(--accent-pink)
    );
}

.timeline-items {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.timeline-item {
    position: relative;
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
}

.timeline-marker {
    position: absolute;
    left: -2.5rem;
    top: 50%;
    width: 1rem;
    height: 1rem;
    border-radius: 50%;
    border: 3px solid var(--bg-primary);
    z-index: 2;
}

.timeline-date {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.timeline-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.timeline-description {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.timeline-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-blue);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-base);
}

.timeline-link:hover {
    gap: 1rem;
}

/* Методы */
.methods-section {
    padding: 4rem 0;
}

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

.method-card {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 2rem;
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.method-card:hover {
    transform: translateY(-5px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-glow);
}

.method-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-blue);
}

.method-card.scytale::before { background: var(--gradient-teal); }
.method-card.caesar::before { background: var(--gradient-gold); }
.method-card.vigenere::before { background: var(--gradient-wine); }
.method-card.enigma::before { background: var(--gradient-blue); }
.method-card.des::before { background: linear-gradient(135deg, var(--accent-orange), #e67e22); }
.method-card.rsa::before { background: linear-gradient(135deg, var(--accent-red), #e74c3c); }
/* .method-card.pgp::before { background: linear-gradient(135deg, var(--accent-purple), #8e44ad); } */
.method-card.aes::before { background: linear-gradient(135deg, var(--accent-green), #27ae60); }
.method-card.quantum::before { background: linear-gradient(135deg, var(--accent-pink), #e84393); }

.method-card-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.method-card.scytale .method-card-icon { color: var(--accent-teal); }
.method-card.caesar .method-card-icon { color: var(--accent-gold); }
.method-card.vigenere .method-card-icon { color: var(--accent-wine); }
.method-card.enigma .method-card-icon { color: var(--accent-blue); }
.method-card.des .method-card-icon { color: var(--accent-orange); }
.method-card.rsa .method-card-icon { color: var(--accent-red); }
/* .method-card.pgp .method-card-icon { color: var(--accent-purple); } */
.method-card.aes .method-card-icon { color: var(--accent-green); }
.method-card.quantum .method-card-icon { color: var(--accent-pink); }

.method-card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.method-card-period {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.method-card-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.method-card-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-blue);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-base);
}

.method-card.scytale .method-card-link { color: var(--accent-teal); }
.method-card.caesar .method-card-link { color: var(--accent-gold); }
.method-card.vigenere .method-card-link { color: var(--accent-wine); }
.method-card.enigma .method-card-link { color: var(--accent-blue); }
.method-card.des .method-card-link { color: var(--accent-orange); }
.method-card.rsa .method-card-link { color: var(--accent-red); }
/* .method-card.pgp .method-card-link { color: var(--accent-purple); } */
.method-card.aes .method-card-link { color: var(--accent-green); }
.method-card.quantum .method-card-link { color: var(--accent-pink); }

.method-card-link:hover {
    gap: 1rem;
}

/* О проекте */
.about-section {
    padding: 4rem 0;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-text {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

.about-text ul {
    margin: 1.5rem 0;
    padding-left: 1.5rem;
}

.about-text li {
    margin-bottom: 0.5rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.stat-card {
    background-color: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
}

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

.stat-icon {
    font-size: 2rem;
    color: var(--accent-blue);
    margin-bottom: 1rem;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* Футер */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 4rem 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    /* max-height: 300px; */
}

.footer-section h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.footer-section p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--bg-surface);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-base);
}

.social-link:hover {
    color: var(--text-primary);
    background-color: var(--bg-card);
    transform: translateY(-2px);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-base);
}

.footer-links a:hover {
    color: var(--text-primary);
}

.footer-bottom {
    text-align: center;
    padding: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.875rem;
}

.footer-note {
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

/* Адаптивность */
@media (max-width: 768px) {
    .nav-container {
        justify-content: space-between;
    }

    .logo {
        position: static;
        transform: none;
    }

    .nav-menu {
        display: none; /* Скрываем основное меню */
    }
    
    .mobile-menu-btn {
        display: block;
        position: static;
        transform: none;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.25rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .timeline-container {
        padding-left: 1.5rem;
    }
    
    .timeline-marker {
        left: -1.75rem;
    }
    
    .methods-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

.cta-buttons {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.warning-note, .historical-note {
    margin: 1.5rem 0;
    padding: 1.5rem;
    border-radius: var(--radius-md);
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.warning-note {
    background: rgba(248, 81, 73, 0.05);
    border-left: 4px solid var(--accent-red);
}

.warning-note i {
    color: var(--accent-red);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.historical-note {
    background: rgba(227, 179, 65, 0.05);
    border-left: 4px solid var(--accent-gold);
}

.historical-note i {
    color: var(--accent-gold);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.about-text h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.about-text ul {
    margin: 1.5rem 0;
    padding-left: 1.5rem;
}

.about-text li {
    margin-bottom: 1rem;
    line-height: 1.6;
}

.about-text li strong {
    color: var(--accent-blue);
}

@media (max-width: 768px) {
    .cta-buttons .btn {
        width: 100%;
        justify-content: center;
    }
}

.team-member-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    position: relative;
    overflow: hidden;
}

.team-member-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-blue);
    box-shadow: var(--shadow-lg);
}

.team-member-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.team-member-card:hover::before {
    opacity: 1;
}

.contact-link:hover {
    transform: translateY(-3px);
    color: var(--text-primary);
    background: var(--accent-blue);
}

.contact-link:hover i {
    color: white;
}

.member-avatar {
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.member-avatar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), transparent);
    border-radius: 50%;
}

.role-tag {
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.team-member-card:hover .role-tag {
    transform: translateY(-2px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Адаптивность */
@media (max-width: 768px) {
    .team-container {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .member-header {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .member-roles {
        justify-content: center;
    }
    
    .member-contact {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .team-member-card {
        padding: 1.5rem;
    }
    
    .member-avatar {
        width: 70px;
        height: 70px;
        font-size: 1.5rem;
    }
}