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

body {
    font-family: 'Courier New', monospace;
    background-color: #FFFFFF;
    color: #17191b;
    line-height: 1.6;
}

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

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-bottom: 2px solid #313c48;
    margin-bottom: 30px;
}

.logo-container {
    flex-shrink: 0;
}

.security-badge {
    background: #17191b;
    color: #FFFFFF;
    padding: 8px 16px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: bold;
    text-transform: uppercase;
}

.main-nav {
    margin: 30px 0;
    border-bottom: 1px solid #e9ecef;
    border-top: 1px solid #e9ecef;
    padding: 15px 0;
}

.main-nav ul {
    display: flex;
    justify-content: center;
    list-style: none;
    gap: 40px;
}

.main-nav a {
    text-decoration: none;
    color: #17191b;
    font-weight: bold;
    text-transform: uppercase;
    font-size: 14px;
    letter-spacing: 1px;
    transition: color 0.3s ease;
}

.main-nav a:hover {
    color: #313c48;
}

.hero {
    text-align: center;
    padding: 60px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    border-radius: 12px;
    margin-bottom: 60px;
}

.hero-title {
    font-size: 2.8rem;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: #17191b;
}

.hero-subtitle {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto 40px;
    color: #313c48;
    line-height: 1.8;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    max-width: 900px;
    margin: 0 auto;
}

.stat-item {
    text-align: center;
    padding: 20px;
}

.stat-number {
    display: block;
    font-size: 2.2rem;
    font-weight: bold;
    color: #313c48;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: #17191b;
}

.links-section, .validator-section, .features, .security-section, .guide-section, .faq-section {
    margin: 80px 0;
}

h2 {
    text-align: center;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: #17191b;
    font-size: 2rem;
}

.section-description {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 40px;
    color: #313c48;
    font-size: 1.1rem;
    line-height: 1.8;
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.link-item {
    background: #f8f9fa;
    border: 1px solid #313c48;
    padding: 20px;
    border-radius: 8px;
    transition: all 0.3s ease;
    cursor: pointer;
    word-break: break-all;
    text-align: center;
    font-weight: bold;
}

.link-item:hover {
    background: #313c48;
    color: #FFFFFF;
    transform: translateY(-2px);
}

.security-notice {
    background: #fff3cd;
    border: 1px solid #ffeaa7;
    padding: 25px;
    border-radius: 8px;
    margin-top: 30px;
}

.security-notice h3 {
    color: #856404;
    margin-bottom: 15px;
    text-transform: uppercase;
}

.validator-container {
    display: flex;
    max-width: 700px;
    margin: 0 auto;
    gap: 15px;
}

.validator-input {
    flex: 1;
    padding: 18px;
    border: 2px solid #17191b;
    border-radius: 6px;
    font-family: 'Courier New', monospace;
    font-size: 16px;
}

.validator-btn {
    background: #17191b;
    color: #FFFFFF;
    border: none;
    padding: 18px 35px;
    border-radius: 6px;
    cursor: pointer;
    text-transform: uppercase;
    font-weight: bold;
    letter-spacing: 1px;
    transition: background 0.3s ease;
    white-space: nowrap;
}

.validator-btn:hover {
    background: #313c48;
}

.validation-result {
    text-align: center;
    margin-top: 25px;
    font-weight: bold;
    min-height: 30px;
    font-size: 1.1rem;
    padding: 15px;
    border-radius: 6px;
}

.valid {
    color: #155724;
    background: #d4edda;
    border: 1px solid #c3e6cb;
}

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

.feature-grid, .protocol-grid, .guide-steps, .faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature-card, .protocol-item, .step, .faq-item {
    background: #f8f9fa;
    padding: 35px;
    border-radius: 10px;
    border: 1px solid #e9ecef;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover, .protocol-item:hover, .step:hover, .faq-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.feature-card h3, .protocol-item h3, .step h3, .faq-item h3 {
    margin-bottom: 20px;
    color: #17191b;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-size: 1.2rem;
}

.faq-item h3 {
    color: #313c48;
}

footer {
    margin-top: 80px;
    padding: 60px 0 30px;
    border-top: 2px solid #313c48;
    background: #f8f9fa;
}

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

.footer-section h4 {
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: #17191b;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: 10px;
    padding-left: 15px;
    position: relative;
}

.footer-section li:before {
    content: "■";
    position: absolute;
    left: 0;
    color: #313c48;
    font-size: 8px;
    top: 6px;
}

.footer-warning {
    background: #17191b;
    color: #FFFFFF;
    padding: 25px;
    border-radius: 8px;
    text-align: center;
    font-weight: bold;
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
        padding: 0 20px;
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .validator-container {
        flex-direction: column;
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    header {
        flex-direction: column;
        gap: 20px;
    }
    
    .feature-grid, .protocol-grid, .guide-steps, .faq-grid {
        grid-template-columns: 1fr;
    }
    
    h2 {
        font-size: 1.6rem;
    }
}