/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

/* Header Styles */
.header {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: white;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.nav-brand h1 {
    font-size: 2rem;
    font-weight: bold;
    color: #ffd700;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: #ffd700;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    display: inline-block;
}

.btn-primary {
    background: #ffd700;
    color: #1e3c72;
}

.btn-primary:hover {
    background: #ffed4e;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 215, 0, 0.4);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: #667eea;
    transform: translateY(-2px);
}

/* Services Section */
.services {
    padding: 4rem 0;
    background: white;
}

.services h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #1e3c72;
}

.section-subtitle {
    text-align: center;
    font-size: 1.2rem;
    color: #666;
    margin-bottom: 3rem;
}

.services-table {
    overflow-x: auto;
    margin-top: 2rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    border-radius: 10px;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 10px;
    overflow: hidden;
}

th {
    background: #1e3c72;
    color: white;
    padding: 1rem;
    text-align: left;
    font-weight: 600;
}

td {
    padding: 1rem;
    border-bottom: 1px solid #eee;
    vertical-align: top;
}

tr:hover {
    background-color: #f8f9fa;
}

table a {
    color: #1e3c72;
    text-decoration: none;
    font-weight: 600;
    padding: 8px 16px;
    background: #e3f2fd;
    border-radius: 20px;
    transition: all 0.3s ease;
}

table a:hover {
    background: #1e3c72;
    color: white;
}

/* About Bitcoin Section */
.about-bitcoin {
    padding: 4rem 0;
    background: #f8f9fa;
}

.about-bitcoin h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #1e3c72;
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.content-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.content-card:hover {
    transform: translateY(-5px);
}

.content-card h3 {
    color: #1e3c72;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.content-card h4 {
    color: #2a5298;
    margin: 1.5rem 0 0.5rem 0;
    font-size: 1.2rem;
}

.content-card ul, .content-card ol {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.content-card li {
    margin-bottom: 0.5rem;
}

/* Security Section */
.security {
    padding: 4rem 0;
    background: white;
}

.security h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #1e3c72;
}

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

.security-item {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    border-left: 4px solid #1e3c72;
    transition: transform 0.3s ease;
}

.security-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.security-item h3 {
    color: #1e3c72;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

/* Ad Section */
.ad-section {
    padding: 2rem 0;
    background: #f8f9fa;
    text-align: center;
}

/* Footer */
.footer {
    background: #1e3c72;
    color: white;
    padding: 3rem 0 1rem 0;
}

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

.footer-section h3, .footer-section h4 {
    margin-bottom: 1rem;
    color: #ffd700;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #ffd700;
}

.footer-bottom {
    border-top: 1px solid #2a5298;
    padding-top: 1rem;
    text-align: center;
    color: #ccc;
}

.footer-bottom a {
    color: #ffd700;
    text-decoration: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-menu {
        gap: 1rem;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .content-grid {
        grid-template-columns: 1fr;
    }
    
    .security-grid {
        grid-template-columns: 1fr;
    }
    
    .services-table {
        font-size: 0.9rem;
    }
    
    th, td {
        padding: 0.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 10px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 1rem;
    }
    
    .services h2, .about-bitcoin h2, .security h2 {
        font-size: 2rem;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

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

.content-card, .security-item {
    animation: fadeInUp 0.6s ease-out;
}

/* Focus States for Accessibility */
.btn:focus, a:focus {
    outline: 2px solid #ffd700;
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .header, .footer, .ad-section {
        display: none;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
    }
    
    .hero {
        background: none;
        color: black;
    }
}