:root {
    --primary-color: #0ea5e9; /* Sky Blue */
    --primary-dark: #0284c7;
    --accent-color: #38bdf8;
    --bg-gradient: linear-gradient(135deg, #e0f2fe 0%, #bae6fd 100%);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.5);
    --text-main: #0f172a;
    --text-muted: #475569;
    --white: #ffffff;
}

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

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

/* Particles Background */
#particles-js {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -1;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

/* Glassmorphism Utility */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: 0 8px 32px 0 rgba(14, 165, 233, 0.1);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    text-align: center;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
    border: none;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(14, 165, 233, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: var(--white);
}

.btn-large {
    padding: 16px 40px;
    font-size: 1.1rem;
}

.btn-glow {
    background: var(--primary-color);
    color: var(--white);
    box-shadow: 0 0 20px rgba(14, 165, 233, 0.5);
    animation: glow 2s infinite alternate;
}

@keyframes glow {
    from { box-shadow: 0 0 10px rgba(14, 165, 233, 0.5); }
    to { box-shadow: 0 0 25px rgba(14, 165, 233, 0.8), 0 0 10px var(--accent-color); }
}

/* Header */
header {
    padding: 20px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-dark);
}

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

nav ul {
    list-style: none;
    display: flex;
    gap: 30px;
}

nav a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 600;
    transition: color 0.3s;
}

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

/* Typography */
.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: var(--primary-dark);
}

/* Hero Section */
.hero {
    padding: 150px 0 100px;
    text-align: center;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 20px;
}

.highlight {
    color: var(--primary-color);
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 800px;
    margin: 0 auto 40px;
}

/* Features */
.features {
    padding: 80px 0;
}

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

.feature-card {
    padding: 40px 30px;
    text-align: center;
    transition: transform 0.3s ease;
}

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

.feature-card .icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-bottom: 15px;
    color: var(--primary-dark);
}

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

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

.pricing-card {
    padding: 40px;
    text-align: center;
    position: relative;
    transition: transform 0.3s;
}

.pricing-card:hover {
    transform: scale(1.03);
}

.pricing-card.popular {
    border: 2px solid var(--primary-color);
    background: rgba(255, 255, 255, 0.9);
    padding: 50px 40px;
}

.popular-badge {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #f97316;
    color: white;
    padding: 8px 20px;
    border-radius: 20px;
    font-weight: bold;
    font-size: 0.9rem;
}

.pricing-card h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.price {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 30px;
}

.price .currency {
    font-size: 1.5rem;
    vertical-align: top;
    margin-right: 5px;
}

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

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

.features-list li {
    margin-bottom: 15px;
    color: var(--text-muted);
}

/* Reviews */
.reviews {
    padding: 80px 0;
}

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

.review-card {
    padding: 30px;
}

.stars {
    margin-bottom: 15px;
}

.review-card p {
    font-style: italic;
    margin-bottom: 20px;
    color: var(--text-muted);
}

.user-info {
    font-weight: 600;
    color: var(--primary-dark);
}

/* FAQ */
.faq {
    padding: 80px 0;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 15px;
    overflow: hidden;
}

.faq-question {
    padding: 20px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--primary-dark);
}

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    color: var(--text-muted);
}

.faq-item.active .faq-answer {
    padding: 0 20px 20px;
    max-height: 200px;
}

.faq-item.active .toggle {
    transform: rotate(45deg);
}

.toggle {
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

/* SEO Articles Section */
.seo-articles {
    padding: 60px 0 100px;
}

.article-links {
    list-style: none;
    padding: 30px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 15px;
}

.article-links li a {
    color: var(--primary-dark);
    text-decoration: none;
    transition: color 0.3s;
    display: block;
    padding: 10px;
    border-radius: 8px;
}

.article-links li a:hover {
    color: var(--primary-color);
    background: rgba(255, 255, 255, 0.5);
}

/* Footer */
footer {
    background: var(--text-main);
    color: rgba(255,255,255,0.7);
    padding: 40px 0;
    text-align: center;
}

footer .disclaimer {
    margin-top: 10px;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
}

/* Responsive */
@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        gap: 15px;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .pricing-card.popular {
        padding: 40px;
    }
}