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

:root {
    --primary-color: #007bff;
    --primary-hover: #0056b3;
    --bg-color: #f8fbff;
    --card-bg: rgba(255, 255, 255, 0.8);
    --text-main: #1d1d1f;
    --text-muted: #6e6e73;
    --border-color: rgba(0, 123, 255, 0.1);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.05);
    --radius: 20px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
    background: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

.bg-accent {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
    background: #f8fbff;
}

.bg-accent::before,
.bg-accent::after {
    content: "";
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    z-index: -1;
    animation: move 20s infinite alternate ease-in-out;
}

.bg-accent::before {
    background: radial-gradient(circle, #007bff 0%, transparent 70%);
    top: -10%;
    left: -10%;
}

.bg-accent::after {
    background: radial-gradient(circle, #00c6ff 0%, transparent 70%);
    bottom: -10%;
    right: -10%;
    animation-delay: -10s;
}

@keyframes move {
    0% {
        transform: translate(0, 0) scale(1);
    }

    50% {
        transform: translate(100px, 50px) scale(1.1);
    }

    100% {
        transform: translate(-50px, 100px) scale(0.9);
    }
}

.bg-mesh {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    background-image:
        radial-gradient(at 0% 0%, hsla(210, 100%, 93%, 1) 0, transparent 50%),
        radial-gradient(at 50% 0%, hsla(200, 100%, 95%, 1) 0, transparent 50%),
        radial-gradient(at 100% 0%, hsla(190, 100%, 93%, 1) 0, transparent 50%);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
header {
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    letter-spacing: -0.5px;
    text-decoration: none;
}

.nav-links a {
    margin-left: 32px;
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    transition: color 0.3s;
}

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

/* Hero Section */
.hero {
    padding: 100px 0 60px;
    text-align: center;
}

.hero h1 {
    font-size: clamp(40px, 8vw, 64px);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #1d1d1f 0%, #007bff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 20px;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto 40px;
}

.btn-primary {
    display: inline-block;
    padding: 16px 40px;
    background: var(--primary-color);
    color: white;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 18px;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: 0 10px 20px rgba(0, 123, 255, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 30px rgba(0, 123, 255, 0.3);
}

/* Pricing Section */
.pricing {
    padding: 80px 0;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.pricing-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 40px;
    text-align: center;
    transition: transform 0.3s, border-color 0.3s;
    backdrop-filter: blur(10px);
}

.pricing-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.pricing-card h3 {
    font-size: 24px;
    margin-bottom: 16px;
}

.price {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 8px;
}

.price span {
    font-size: 16px;
    font-weight: 400;
    color: var(--text-muted);
}

.features-list {
    list-style: none;
    margin: 30px 0;
    text-align: left;
}

.features-list li {
    margin-bottom: 12px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
}

.features-list li::before {
    content: "✓";
    color: var(--primary-color);
    margin-right: 12px;
    font-weight: bold;
}

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

/* Footer */
footer {
    padding: 60px 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-nav {
    margin-bottom: 24px;
}

.footer-nav a {
    margin: 0 15px;
    text-decoration: none;
    color: var(--text-muted);
    font-size: 14px;
}

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

.copyright {
    color: var(--text-muted);
    font-size: 14px;
}

/* SEO Content Section */
.seo-section {
    padding: 80px 0;
    background: white;
    border-radius: var(--radius);
    margin: 40px 0;
}

.seo-section h2 {
    text-align: center;
    margin-bottom: 40px;
}

.article-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.article-item {
    padding: 20px;
    border-bottom: 1px solid #eee;
}

.article-item a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    transition: color 0.3s;
}

.article-item a:hover {
    color: var(--primary-color);
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 48px;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
    }

    .pricing-card.featured {
        scale: 1;
    }
}