:root {
–primary-color: #000000;
–secondary-color: #FFFFFF;
–accent-color: #FFDE00;
–text-color: #333333;
–light-bg: #f9f9f9;
–dark-card: #1a1a1a;
–transition: all 0.3s ease;
}

.seopt-case-study { font-family: ‚Montserrat‘, sans-serif; color: var(–text-color); line-height: 1.6; background: #fff; }
.seopt-case-study * { box-sizing: border-box; }
.seopt-case-study .container { max-width: 1000px; margin: 0 auto; padding: 0 20px; }
.seopt-case-study .hero-cs { background: var(–primary-color); color: #fff; padding: 100px 0 60px; text-align: center; border-bottom: 5px solid var(–accent-color); }
.seopt-case-study .hero-cs h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 800; margin-bottom: 20px; text-transform: uppercase; color: #fff; }
.seopt-case-study .hero-cs .client-tag { display: inline-block; background: var(–accent-color); color: #000; padding: 5px 20px; border-radius: 50px; font-weight: 700; font-size: 0.9rem; margin-bottom: 20px; }
.seopt-case-study .chrono-section { padding: 60px 0; background: var(–light-bg); }
.seopt-case-study .chrono-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; margin-top: 40px; }
.seopt-case-study .chrono-card { background: #fff; padding: 30px; border-radius: 15px; box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05); border-top: 4px solid var(–primary-color); }
.seopt-case-study .chrono-card.alert { border-top-color: #ff4444; }
.seopt-case-study .chrono-card.success { border-top-color: #00c851; }
.seopt-case-study .chrono-date { font-weight: 800; color: var(–primary-color); font-size: 1.2rem; margin-bottom: 10px; }
.seopt-case-study .crash-section { padding: 80px 0; background: var(–primary-color); color: #fff; }
.seopt-case-study .crash-stats { display: flex; flex-wrap: wrap; gap: 40px; margin-top: 50px; justify-content: center; }
.seopt-case-study .stat-box-cs { text-align: center; flex: 1; min-width: 200px; padding: 30px; border: 1px solid rgba(255, 255, 255, 0.1); border-radius: 20px; }
.seopt-case-study .stat-val { font-size: 3rem; font-weight: 900; color: var(–accent-color); display: block; }
.seopt-case-study .results-table-wrap { margin-top: 50px; overflow-x: auto; }
.seopt-case-study table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 15px; overflow: hidden; }
.seopt-case-study th { background: var(–primary-color); color: #fff; padding: 20px; text-align: left; }
.seopt-case-study td { padding: 20px; border-bottom: 1px solid #eee; }
.seopt-case-study tr:last-child td { border-bottom: none; }
.seopt-case-study .cta-cs { padding: 80px 0; text-align: center; background: var(–accent-color); }
.seopt-case-study .btn-cs { display: inline-block; background: #000; color: #fff; padding: 20px 40px; border-radius: 60px; font-weight: 800; text-decoration: none; font-size: 1.2rem; transition: var(–transition); box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15); }
.seopt-case-study .btn-cs:hover { transform: scale(1.05); box-shadow: 0 15px 30px rgba(0, 0, 0, 0.25); }
@media (max-width: 768px) { .seopt-case-study .hero-cs { padding: 60px 0 40px; } .seopt-case-study .stat-val { font-size: 2.5rem; } }