:root {
    --primary-color: #3b82f6;
    --secondary-color: #60a5fa;
    --bg-light: #f8fafc;
    --text-dark: #1e293b;
    --text-muted: #64748b;
    --white: #ffffff;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

/* Background Animation */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    overflow: hidden;
}

.circle {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
    animation: float 20s infinite linear;
}

@keyframes float {
    0% { transform: translateY(0) scale(1) rotate(0deg); opacity: 0.3; }
    50% { transform: translateY(-50px) scale(1.2) rotate(180deg); opacity: 0.6; }
    100% { transform: translateY(0) scale(1) rotate(360deg); opacity: 0.3; }
}

/* Navigation */
nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    padding: 1rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s;
}

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

.btn-official {
    background-color: var(--primary-color);
    color: var(--white) !important;
    padding: 0.5rem 1.5rem;
    border-radius: 9999px;
    font-weight: 600;
    transition: transform 0.3s, background-color 0.3s;
}

.btn-official:hover {
    background-color: #2563eb;
    transform: translateY(-2px);
}

/* Hero Section */
.hero {
    padding: 8rem 5% 4rem;
    text-align: center;
    max-width: 1200px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 900;
    margin-bottom: 1.5rem;
    background: linear-gradient(to right, #1d4ed8, #3b82f6);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

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

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
    border-radius: 12px;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.3s;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
    box-shadow: 0 4px 14px 0 rgba(59, 130, 246, 0.39);
}

.btn-primary:hover {
    background-color: #2563eb;
    transform: scale(1.05);
}

/* Features */
.features {
    padding: 4rem 5%;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-10px);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

/* Pricing Table */
.pricing {
    padding: 6rem 5%;
    background: rgba(255, 255, 255, 0.5);
}

.section-title {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title h2 {
    font-size: 2.5rem;
    font-weight: 800;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--white);
    border-radius: 24px;
    padding: 3rem;
    text-align: center;
    box-shadow: var(--shadow-lg);
    border: 1px solid #e2e8f0;
    position: relative;
    overflow: hidden;
}

.pricing-card.featured {
    border: 2px solid var(--primary-color);
    transform: scale(1.05);
}

.pricing-card .badge {
    position: absolute;
    top: 20px;
    right: -30px;
    background: var(--primary-color);
    color: var(--white);
    padding: 5px 40px;
    transform: rotate(45deg);
    font-size: 0.875rem;
    font-weight: 700;
}

.plan-name {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.plan-price {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.plan-price span {
    font-size: 1rem;
    color: var(--text-muted);
}

.plan-traffic {
    background: #eff6ff;
    color: var(--primary-color);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    display: inline-block;
    font-weight: 700;
    margin-bottom: 2rem;
}

.plan-details {
    list-style: none;
    margin-bottom: 2.5rem;
    text-align: left;
}

.plan-details li {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.plan-details li::before {
    content: "✓";
    color: #10b981;
    font-weight: 900;
}

/* Article List */
.articles {
    padding: 6rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

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

.article-card {
    background: var(--white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.3s;
}

.article-card:hover {
    box-shadow: var(--shadow-md);
}

.article-content {
    padding: 1.5rem;
}

.article-content h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.article-content a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

/* Footer */
footer {
    padding: 4rem 5%;
    background: var(--white);
    border-top: 1px solid #e2e8f0;
    text-align: center;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    display: block;
    text-decoration: none;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-links a {
    text-decoration: none;
    color: var(--text-muted);
}

.copyright {
    color: var(--text-muted);
}

/* Node Status Section */
.nodes {
    padding: 6rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.nodes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.node-card {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    gap: 1rem;
    border: 1px solid #f1f5f9;
}

.node-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.node-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
}

.status-dot {
    width: 10px;
    height: 10px;
    background-color: #10b981;
    border-radius: 50%;
    position: relative;
}

.status-dot.pulsing::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: #10b981;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    100% { transform: scale(3); opacity: 0; }
}

.node-stats {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.load-bar-container {
    height: 8px;
    background: #f1f5f9;
    border-radius: 4px;
    overflow: hidden;
}

.load-bar {
    height: 100%;
    background: linear-gradient(to right, #3b82f6, #60a5fa);
    width: 45%;
    transition: width 1s ease-in-out;
}

/* Tablet Optimizations */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    .pricing-card.featured {
        transform: scale(1);
    }
    .nav-links {
        display: none;
    }
}