/* Base Styles */
:root {
    --primary-color: #4a90e2;
    --primary-dark: #357abd;
    --bg-color: #f5f7fa;
    --text-main: #333333;
    --text-muted: #666666;
    --card-bg: rgba(255, 255, 255, 0.9);
    --border-color: #eaeaea;
    --gradient-bg: linear-gradient(135deg, #4a90e2 0%, #003973 100%);
    --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 20px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 15px 30px rgba(74, 144, 226, 0.2);
}

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

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

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: color 0.3s ease;
}

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

ul {
    list-style: none;
}

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

/* Glassmorphism utility */
.glass {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 16px;
}

/* Navbar */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(15px);
    box-shadow: var(--shadow-sm);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    color: var(--text-main);
    font-weight: 500;
}

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

.auth-buttons {
    display: flex;
    gap: 15px;
}

.btn {
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #fff;
    border: none;
    box-shadow: 0 4px 10px rgba(74, 144, 226, 0.3);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

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

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

/* Hero Section */
.hero {
    margin-top: 80px;
    padding: 100px 0;
    background: var(--gradient-bg);
    color: #fff;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"><polygon points="0,100 100,0 100,100" fill="rgba(255,255,255,0.05)"/></svg>') no-repeat center center/cover;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.hero p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.hero .tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
}

.hero .tags span {
    background: rgba(255, 255, 255, 0.2);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 14px;
    backdrop-filter: blur(5px);
}

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

.section-title {
    text-align: center;
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 50px;
    color: var(--text-main);
}

.features-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, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    font-size: 40px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
}

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

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

.pricing-card:hover {
    transform: scale(1.02);
}

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

.pricing-card.popular:hover {
    transform: scale(1.07);
}

.popular-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: #fff;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: bold;
}

.price {
    font-size: 48px;
    font-weight: 800;
    color: var(--primary-color);
    margin: 20px 0;
}

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

.pricing-features {
    text-align: left;
    margin: 30px 0;
}

.pricing-features li {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.pricing-features li::before {
    content: '✓';
    color: #10b981;
    font-weight: bold;
}

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

.review-card {
    padding: 30px;
}

.reviewer {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.reviewer-avatar {
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: bold;
}

.stars {
    color: #fbbf24;
    margin-bottom: 10px;
}

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

.faq-item {
    margin-bottom: 20px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
}

.faq-question {
    font-weight: 600;
    font-size: 18px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-answer {
    margin-top: 15px;
    color: var(--text-muted);
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
}

/* Blog Section */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.blog-card {
    padding: 20px;
    transition: transform 0.3s ease;
}

.blog-card:hover {
    transform: translateY(-5px);
}

.blog-card h4 {
    margin-bottom: 10px;
    font-size: 18px;
}

/* Footer */
footer {
    background: #1f2937;
    color: #fff;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    margin-bottom: 20px;
    font-size: 18px;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col a {
    color: #9ca3af;
}

.footer-col a:hover {
    color: #fff;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #374151;
    color: #9ca3af;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .hero h1 {
        font-size: 36px;
    }
}