:root {
    --primary-color: #5a67d8;
    --primary-color-hover: #434ce8;
    --secondary-color: #2b6cb0;
    --bg-color: #f5f8ff;
    --text-main: #1f2937;
    --text-muted: #6b7280;
    --white: #ffffff;
    --footer-bg: #111827;
    
    --container-max-width: 1200px;
    --base-spacing: 1rem;
    --section-spacing: 5rem;
    
    --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);
    --border-radius: 8px;
    --border-radius-lg: 16px;
    --transition: all 0.3s ease;
}

/* Base Reset & Typography */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--text-main);
    background-color: var(--white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

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

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

section {
    padding: var(--section-spacing) 0;
}

/* Typography SEO */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--text-main);
}
h1 { font-size: 3rem; font-weight: 800; letter-spacing: -0.05em; }
h2 { font-size: 2.25rem; font-weight: 700; text-align: center; }
h3 { font-size: 1.5rem; font-weight: 600; }
p { margin-bottom: 1rem; color: var(--text-muted); }

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: var(--border-radius);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}
.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
    box-shadow: var(--shadow-md);
}
.btn-primary:hover {
    background-color: var(--primary-color-hover);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}
.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}
.btn-outline:hover {
    background-color: var(--primary-color);
    color: var(--white);
}
.btn-block {
    display: block;
    width: 100%;
}

/* Header */
.site-header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}
.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}
.site-logo {
    font-size: 1.5rem;
    font-weight: 800;
}
.site-logo a { color: var(--primary-color); }
.primary-navigation ul {
    list-style: none;
    display: flex;
    gap: 2rem;
}
.primary-navigation a {
    color: var(--text-main);
    font-weight: 500;
}
.primary-navigation a:hover { color: var(--primary-color); }
.header-actions { display: flex; gap: 1rem; align-items: center; }
.mobile-menu-toggle { display: none; background: none; border: none; cursor: pointer; }
.mobile-menu-toggle .bar { display: block; width: 25px; height: 3px; background-color: var(--text-main); margin: 5px 0; }

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #e0e7ff 0%, #f5f8ff 100%);
    padding: calc(var(--section-spacing) * 1.5) 0;
    overflow: hidden;
}
.hero-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}
.hero-content h1 span { color: var(--primary-color); }
.hero-content p { font-size: 1.125rem; margin-bottom: 2rem; }
.hero-actions { display: flex; gap: 1rem; }
.hero-image img {
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    transform: perspective(1000px) rotateY(-5deg);
}

/* Section Headings */
.section-header { text-align: center; max-width: 600px; margin: 0 auto 3rem auto; }
.section-header p { font-size: 1.125rem; }

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}
.feature-card {
    background: var(--white);
    padding: 2.5rem 2rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    text-align: center;
    border: 1px solid #e5e7eb;
    transition: var(--transition);
}
.feature-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: var(--primary-color); }
.feature-icon {
    width: 64px; height: 64px;
    background: #e0e7ff;
    color: var(--primary-color);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 1.5rem auto; font-size: 1.5rem;
}
.feature-card h3 { margin-bottom: 1rem; }

/* Pricing */
.pricing-section { background-color: var(--bg-color); }
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    align-items: center;
}
.pricing-card {
    background: var(--white);
    padding: 3rem 2rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    position: relative;
    border: 1px solid #e5e7eb;
}
.pricing-card.popular {
    transform: scale(1.05);
    border: 2px solid var(--primary-color);
    box-shadow: var(--shadow-lg);
    z-index: 10;
}
.popular-badge {
    position: absolute; top: 0; left: 50%;
    transform: translate(-50%, -50%);
    background: var(--primary-color); color: var(--white);
    padding: 0.25rem 1rem; border-radius: 20px; font-size: 0.875rem; font-weight: 600;
}
.pricing-price { font-size: 3rem; font-weight: 800; color: var(--text-main); margin: 1.5rem 0; }
.pricing-price span { font-size: 1rem; color: var(--text-muted); font-weight: 500; }
.pricing-features { list-style: none; margin: 2rem 0; text-align: left; }
.pricing-features li { padding: 0.5rem 0; border-bottom: 1px solid #e5e7eb; display: flex; align-items: center; }
.pricing-features li::before {
    content: "✓"; color: var(--primary-color); font-weight: bold; margin-right: 0.75rem;
}

/* Detailed Info Columns - Alternating */
.info-row {
    display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center;
    margin-bottom: 5rem;
}
.info-row:nth-child(even) .info-content { order: 2; }
.info-row:nth-child(even) .info-image { order: 1; }
.info-content ul { list-style: disc; margin-left: 1.5rem; margin-top: 1.5rem; }
.info-image img { border-radius: var(--border-radius-lg); box-shadow: var(--shadow-lg); }

/* FAQ Section */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid #e5e7eb; padding: 1.5rem 0; }
.faq-question { font-size: 1.25rem; font-weight: 600; color: var(--text-main); margin-bottom: 0.5rem; cursor: pointer; display: flex; justify-content: space-between;}
.faq-answer { color: var(--text-muted); }

/* Footer */
.site-footer { background-color: var(--footer-bg); color: #9ca3af; padding-top: 4rem; }
.footer-title { color: var(--white); margin-bottom: 1.5rem; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 3rem; margin-bottom: 3rem; }
.footer-logo { font-size: 1.5rem; font-weight: 800; color: var(--white); margin-bottom: 1rem; display: block; }
.brand-desc { margin-bottom: 1.5rem; }
.social-links a {
    display: inline-flex; align-items: center; justify-content: center;
    width: 36px; height: 36px; background: rgba(255,255,255,0.1); border-radius: 50%;
    color: var(--white); margin-right: 0.5rem; transition: var(--transition);
}
.social-links a:hover { background: var(--primary-color); }
.links-col ul { list-style: none; }
.links-col li { margin-bottom: 0.75rem; }
.links-col a { color: #9ca3af; transition: var(--transition); }
.links-col a:hover { color: var(--white); padding-left: 5px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 1.5rem 0; text-align: center; font-size: 0.875rem; }

/* Internal Pages (Single, Page, Search) */
.page-header { background: var(--bg-color); padding: 4rem 0; text-align: center; border-bottom: 1px solid #e5e7eb;}
.page-header h1 { margin-bottom: 0.5rem; }
.site-content { padding: var(--section-spacing) 0; }
.content-area { max-width: 800px; margin: 0 auto; }
.article-content { font-size: 1.125rem; line-height: 1.8; }
.article-content h2, .article-content h3 { margin-top: 2rem; }
.article-content img { border-radius: var(--border-radius); margin: 2rem 0; }

/* Responsive Media Queries */
@media (max-width: 992px) {
    .pricing-grid { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
    .pricing-card.popular { transform: none; }
}

@media (max-width: 768px) {
    .hero-inner { grid-template-columns: 1fr; text-align: center; }
    .hero-actions { justify-content: center; }
    .info-row { grid-template-columns: 1fr; gap: 2rem; }
    .info-row:nth-child(even) .info-content { order: 1; }
    .info-row:nth-child(even) .info-image { order: 2; }
    .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
    
    .primary-navigation { display: none; } /* Requires JS mobile menu toggle */
    .mobile-menu-toggle { display: block; }
    .header-actions .btn { display: none; }
}