:root {
    --primary: #1d4ed8; /* Vibrant Blue */
    --primary-hover: #1e40af;
    --bg-dark: #f0f9ff; /* Light Sky Blue */
    --bg-card: rgba(255, 255, 255, 0.8); /* Translucent white */
    --text-main: #0f172a; /* Deep Navy for contrast */
    --text-muted: #475569;
    --accent: #f59e0b; /* Amber/Gold */
    --gradient: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    --dynamic-bg: linear-gradient(-45deg, #f0f9ff, #e0f2fe, #bae6fd, #f0f9ff);
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
    background: var(--dynamic-bg);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
    color: var(--text-main);
    font-family: var(--font-main);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

@keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

strong, b {
    color: var(--text-main);
    font-weight: 700;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes glow {
    0% { box-shadow: 0 0 5px rgba(255, 215, 0, 0.2); }
    50% { box-shadow: 0 0 20px rgba(255, 215, 0, 0.4); }
    100% { box-shadow: 0 0 5px rgba(255, 215, 0, 0.2); }
}

.animate-fade-in {
    animation: fadeInUp 0.8s ease-out forwards;
}

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

section {
    padding: 80px 0;
}

/* Header */
header {
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(15px);
    z-index: 1000;
    border-bottom: 1px solid rgba(59, 130, 246, 0.1);
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links a {
    margin-left: 30px;
    font-weight: 500;
    font-size: 0.9rem;
}

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

/* Hero Section */
.hero {
    height: 90vh;
    display: flex;
    align-items: center;
    text-align: center;
    position: relative;
    background: radial-gradient(circle at center, rgba(59, 130, 246, 0.1) 0%, transparent 80%);
}

.hero h1 {
    font-size: 4rem;
    font-weight: 900;
    margin-bottom: 20px;
    letter-spacing: -2px;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto 40px;
}

.btn-primary {
    background: var(--gradient);
    color: #fff;
    padding: 16px 40px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.1rem;
    display: inline-block;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.2);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(59, 130, 246, 0.4);
}

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

.feature-card {
    background: var(--bg-card);
    padding: 40px;
    border-radius: 24px;
    border: 1px solid rgba(59, 130, 246, 0.1);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.feature-card:hover {
    border-color: rgba(255, 215, 0, 0.3);
    transform: translateY(-5px);
}

.feature-card i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 20px;
    display: block;
}

.feature-card h3 {
    margin-bottom: 15px;
    font-size: 1.5rem;
}

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

.pricing-card {
    background: var(--bg-card);
    padding: 50px 40px;
    border-radius: 32px;
    border: 1px solid rgba(59, 130, 246, 0.1);
    backdrop-filter: blur(10px);
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.05);
}

.pricing-card.popular {
    border: 2px solid var(--primary);
    transform: scale(1.05);
    z-index: 10;
    box-shadow: 0 30px 60px rgba(59, 130, 246, 0.15);
}

.popular-tag {
    position: absolute;
    top: 20px;
    right: -35px;
    background: var(--primary);
    color: #fff;
    padding: 5px 40px;
    transform: rotate(45deg);
    font-size: 0.8rem;
    font-weight: 700;
}

.price {
    font-size: 3rem;
    font-weight: 800;
    margin: 20px 0;
}

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

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

.pricing-features li {
    margin-bottom: 15px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
}

.pricing-features li::before {
    content: "✓";
    color: var(--primary);
    margin-right: 10px;
    font-weight: bold;
}

/* Testimonials */
.testimonial-card {
    background: white;
    padding: 30px;
    border-radius: 20px;
    margin-bottom: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.03);
}

.user-info {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.user-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: #e2e8f0;
    margin-right: 15px;
}

/* FAQ */
.faq-item {
    margin-bottom: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 20px;
}

.faq-question {
    font-weight: 700;
    font-size: 1.1rem;
    cursor: pointer;
    margin-bottom: 10px;
}

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

/* Footer */
footer {
    padding: 60px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    margin-top: 80px;
    text-align: center;
}

.footer-links {
    margin: 30px 0;
}

.footer-links a {
    margin: 0 15px;
    color: var(--text-muted);
}

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