/* SEO Performance CSS - ExplainMe Premium Update */
:root {
    --primary: #2563EB;
    --primary-light: #DBEAFE;
    --accent: #10B981;
    --accent-light: #D1FAE5;
    --text-dark: #0F172A;
    --text-muted: #64748B;
    --bg-main: #F8FAFC;
    --glass: rgba(255, 255, 255, 0.85);
    --border: #E2E8F0;
    --radius: 16px;
    --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--text-dark);
    line-height: 1.7;
    background: radial-gradient(circle at 10% 20%, rgba(37, 99, 235, 0.03) 0%, transparent 40%),
                radial-gradient(circle at 90% 80%, rgba(16, 185, 129, 0.03) 0%, transparent 40%),
                var(--bg-main);
    margin: 0;
    padding: 0;
    min-height: 100vh;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Breadcrumbs */
.breadcrumbs {
    display: flex;
    gap: 8px;
    font-size: 14px;
    color: var(--text-muted);
    padding: 32px 0;
    align-items: center;
}
.breadcrumbs a { color: var(--primary); text-decoration: none; font-weight: 500; }
.breadcrumbs i { font-size: 18px; opacity: 0.5; }

/* Header Section */
.seo-header { margin-bottom: 56px; text-align: left; }
.seo-header h1 { font-size: 48px; font-weight: 800; letter-spacing: -0.025em; line-height: 1.1; margin-bottom: 20px; color: var(--text-dark); }
.seo-header .meta { font-size: 16px; color: var(--text-muted); display: flex; align-items: center; gap: 12px; }
.seo-header .meta strong { color: var(--text-dark); }

/* Main Content Grid */
.card-grid { display: grid; gap: 32px; margin-bottom: 64px; }
.card {
    background: var(--glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1); }
.card h2 { font-size: 26px; font-weight: 700; margin-top: 0; margin-bottom: 24px; color: var(--text-dark); display: flex; align-items: center; gap: 16px; }
.card h2 i { background: var(--primary-light); color: var(--primary); padding: 10px; border-radius: 12px; font-size: 24px; }

/* Stylized Boxes */
.highlight-box {
    background: #F0F9FF;
    border-radius: 12px;
    padding: 24px;
    margin: 24px 0;
    display: flex;
    gap: 16px;
    color: #0369A1;
    font-weight: 500;
}
.highlight-box.action { background: #ECFDF5; color: #065F46; }

/* Step List */
.step-list { display: flex; flex-direction: column; gap: 20px; }
.step-item { display: flex; gap: 20px; align-items: flex-start; }
.step-number {
    width: 32px; height: 32px; border-radius: 10px; background: var(--primary); color: #fff;
    display: flex; align-items: center; justify-content: center; font-size: 16px; font-weight: 700;
    flex-shrink: 0; box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.3);
}
.step-text { font-size: 17px; font-weight: 500; color: #334155; }

/* CTA Unit */
.cta-section {
    background: linear-gradient(135deg, #1E293B 0%, #0F172A 100%);
    color: #fff;
    border-radius: 24px;
    padding: 72px 48px;
    text-align: center;
    margin-bottom: 80px;
    position: relative;
    overflow: hidden;
}
.cta-section::before {
    content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
}
.cta-section h2 { font-size: 36px; margin-bottom: 16px; position: relative; z-index: 1; }
.cta-section p { font-size: 18px; margin-bottom: 32px; opacity: 0.8; max-width: 600px; margin-left: auto; margin-right: auto; position: relative; z-index: 1; }
.cta-btns { display: flex; justify-content: center; gap: 20px; position: relative; z-index: 1; }

.btn-cta {
    display: inline-flex; align-items: center; gap: 8px; background: var(--primary); color: #fff;
    padding: 18px 36px; border-radius: 14px; font-weight: 700; text-decoration: none;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}
.btn-cta:hover { transform: translateY(-2px) scale(1.02); background: #1d4ed8; box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.4); }

/* Related Grid */
.related-section { border-top: 1px solid var(--border); padding: 56px 0; }
.related-links { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }
.related-links a {
    background: #fff; border: 1px solid var(--border); padding: 16px 20px; border-radius: 12px;
    color: var(--text-dark); font-weight: 500; text-decoration: none; transition: 0.2s;
}
.related-links a:hover { border-color: var(--primary); color: var(--primary); transform: translateX(4px); }

/* Sticky Language Switcher */
.lang-switcher {
    position: fixed; bottom: 32px; right: 32px; background: var(--text-dark); color: #fff;
    padding: 12px 24px; border-radius: 99px; box-shadow: 0 10px 15px -3px rgba(0,0,0,0.2);
    display: flex; gap: 10px; align-items: center; font-size: 15px; font-weight: 600;
    z-index: 100; cursor: pointer; transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.lang-switcher:hover { transform: translateY(-4px); box-shadow: 0 20px 25px -5px rgba(0,0,0,0.3); }

@media (max-width: 768px) {
    .seo-header h1 { font-size: 36px; }
    .card { padding: 32px 24px; }
    .cta-section { padding: 56px 24px; }
    .cta-btns { flex-direction: column; }
}

/* Feature Grid Styles */
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 32px; }
.feature-item { display: flex; gap: 20px; align-items: flex-start; }
.feature-item i { font-size: 28px; color: var(--accent); background: var(--accent-light); padding: 12px; border-radius: 12px; }
.feature-item strong { display: block; font-size: 18px; margin-bottom: 4px; }
.feature-item p { margin: 0; color: var(--text-muted); font-size: 15px; }

/* FAQ Styles */
.faq-list { display: flex; flex-direction: column; gap: 24px; }
.faq-item { border-bottom: 1px solid var(--border); padding-bottom: 24px; }
.faq-item:last-child { border-bottom: none; }
.faq-item h4 { font-size: 18px; font-weight: 700; margin: 0 0 12px 0; color: var(--text-dark); }
.faq-item p { margin: 0; color: #475569; font-size: 16px; }

@media (max-width: 640px) {
    .features-grid { grid-template-columns: 1fr; }
}