@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --secondary-color: #0ea5e9;
    --bg-gradient: linear-gradient(135deg, #0f172a, #1e293b, #0f172a);
    --text-color: #f8fafc;
    --text-muted: #94a3b8;
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-border: rgba(255, 255, 255, 0.1);
    --glass-bg: rgba(0, 0, 0, 0.2);
    --glass-blur: blur(12px);
}

*, *::before, *::after {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg-gradient);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 3rem;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--card-border);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    letter-spacing: -0.025em;
}

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

.nav-links {
    display: flex;
    gap: 1rem;
    align-items: center;
}

/* Buttons */
.btn {
    padding: 0.75rem 2rem;
    border-radius: 9999px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: 1px solid transparent;
}

.btn-sm {
    padding: 0.5rem 1.25rem;
    font-size: 0.875rem;
}

.btn-primary {
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
    border: none;
}

.btn-secondary {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn-primary:hover {
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.6);
}

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

/* Hero Section */
.hero {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 160px 20px 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, rgba(0, 0, 0, 0) 70%);
    pointer-events: none;
    z-index: -1;
}

.hero h1 {
    font-size: 4.5rem;
    font-weight: 800;
    margin: 0 0 1.5rem;
    background: linear-gradient(to right, #ffffff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.05em;
    line-height: 1.1;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 3rem;
    color: var(--text-muted);
    max-width: 600px;
    line-height: 1.6;
}

.btn-group {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
}

/* Features Section */
.features {
    padding: 100px 20px;
    background: rgba(0, 0, 0, 0.2);
    border-top: 1px solid var(--card-border);
}

.features-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 2.5rem;
    border-radius: 1.5rem;
    text-align: left;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.feature-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.2);
}

.feature-icon {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 1rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 1rem;
    color: #fff;
    letter-spacing: -0.025em;
}

.feature-card p {
    color: var(--text-muted);
    line-height: 1.6;
    margin: 0;
}

/* Footer */
footer {
    padding: 3rem 1.5rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    border-top: 1px solid var(--card-border);
    background: rgba(0, 0, 0, 0.3);
}

footer a {
    color: var(--text-color);
    text-decoration: none;
    opacity: 0.7;
    transition: opacity 0.2s;
}

footer a:hover {
    opacity: 1;
}

.footer-links {
    margin-top: 1rem;
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

.footer-icp {
    margin-top: 1rem;
    color: rgba(255, 255, 255, 0.3);
}

.cert-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.8rem;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white !important;
    border-radius: 0.5rem;
    font-size: 0.75rem;
    text-decoration: none !important;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 1.5rem;
    font-weight: 500;
    box-shadow: 0 2px 4px rgba(16, 185, 129, 0.2);
    opacity: 1 !important;
}

.cert-link:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 6px rgba(16, 185, 129, 0.3);
}

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

.cert-container {
    text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
    .navbar {
        padding: 1rem 1.5rem;
    }
    
    .hero {
        padding-top: 120px;
    }
    
    .hero h1 {
        font-size: 3rem;
    }
    
    .hero p {
        font-size: 1.125rem;
        padding: 0 1rem;
    }
    
    .btn-group {
        flex-direction: column;
        width: 100%;
        max-width: 300px;
        gap: 1rem;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
        box-sizing: border-box;
    }

    .features-container {
        grid-template-columns: 1fr;
    }
}