:root{
    --bg:#f6f8fb;
    --text:#102033;
    --muted:#64748b;
    --primary:#0f766e;
    --primary-dark:#115e59;
    --accent:#f59e0b;
    --card:#ffffff;
    --line:#e2e8f0;
    --shadow:0 20px 60px rgba(15,23,42,.10);
    --radius:24px;
}
*{box-sizing:border-box}
body{
    margin:0;
    font-family:'Cairo',system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
    background:var(--bg);
    color:var(--text);
    line-height:1.8;
}
a{color:inherit;text-decoration:none}
.topbar{
    position:sticky;
    top:0;
    z-index:20;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
    padding:14px 6vw;
    background:rgba(255,255,255,.92);
    backdrop-filter:blur(16px);
    border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;color:var(--primary-dark);max-width:520px}
.brand-mark{display:inline-grid;place-items:center;width:46px;height:46px;border-radius:16px;background:linear-gradient(135deg,var(--primary),#22c55e);color:white;letter-spacing:.5px}
.nav{display:flex;align-items:center;gap:4px;flex-wrap:wrap}
.nav a{padding:9px 13px;border-radius:999px;color:#334155;font-weight:700;font-size:14px}
.nav a:hover{background:#ecfdf5;color:var(--primary-dark)}
.menu-toggle{display:none;border:0;background:var(--primary);color:#fff;border-radius:12px;padding:8px 12px;font-size:20px}
.hero{
    display:grid;
    grid-template-columns:1.2fr .8fr;
    gap:34px;
    padding:80px 6vw 55px;
    background:
        radial-gradient(circle at 10% 10%,rgba(15,118,110,.16),transparent 32%),
        linear-gradient(140deg,#ffffff 0%,#ecfeff 55%,#f8fafc 100%);
}
.hero h1,.page-head h1{font-size:clamp(32px,4vw,58px);line-height:1.25;margin:0 0 18px;font-weight:800;color:#0f172a}
.lead,.page-head p{font-size:19px;color:var(--muted);max-width:850px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--primary);font-weight:800;margin:0 0 10px}
.eyebrow:before{content:'';width:34px;height:3px;background:var(--accent);border-radius:99px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;padding:12px 22px;font-weight:800;border:1px solid transparent;cursor:pointer;transition:.2s ease;font-family:inherit}
.btn.primary{background:var(--primary);color:#fff;box-shadow:0 14px 35px rgba(15,118,110,.25)}
.btn.primary:hover{background:var(--primary-dark);transform:translateY(-2px)}
.btn.ghost{border-color:var(--line);background:#fff;color:var(--primary-dark)}
.btn.small{padding:9px 16px;background:#ecfdf5;color:var(--primary-dark)}
.btn.full{width:100%;margin-top:20px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:28px 0}
.center-actions{justify-content:center}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;max-width:650px}
.stats div,.hero-card,.card,.module-card,.team-card,.quiz-card,.lesson,.table-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.stats div{padding:16px;text-align:center}.stats strong{display:block;font-size:26px;color:var(--primary-dark)}.stats span{color:var(--muted);font-weight:700;font-size:14px}
.hero-card{position:relative;padding:34px;overflow:hidden;align-self:center}.hero-card h2{margin-top:0;font-size:28px}.pulse{position:absolute;inset:auto -80px -80px auto;width:220px;height:220px;border-radius:50%;background:rgba(20,184,166,.15)}
.steps{padding-right:20px}.steps li{margin:10px 0;color:#334155;font-weight:700}
.section{padding:54px 6vw}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.card{padding:28px}.card h3,.card h2{margin-top:0}.icon{display:inline-grid;place-items:center;width:50px;height:50px;border-radius:17px;background:#ecfdf5;color:var(--primary);font-weight:800;margin-bottom:12px}
.split{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start}.wide-left{grid-template-columns:1.5fr .7fr}.feature-list{display:grid;gap:12px}.feature-list div{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;font-weight:800;color:#334155}
.page-head{padding:70px 6vw 30px;background:linear-gradient(135deg,#ecfdf5,#fff)}.page-head.centered{text-align:center}.page-head.centered p{margin-inline:auto}
.module-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.module-card{padding:26px}.module-card h2{font-size:23px;line-height:1.45}.module-meta{display:inline-flex;padding:6px 12px;background:#fffbeb;color:#92400e;border-radius:999px;font-weight:800;margin-bottom:10px;font-size:13px}
.lesson{padding:34px}.lesson p{font-size:18px;color:#334155}.clean-list{list-style:none;padding:0;margin:0}.clean-list li{padding:12px 0;border-bottom:1px solid var(--line);color:#334155;font-weight:700}.activity{margin-top:28px;padding:22px;border-radius:20px;background:#f8fafc;border:1px dashed #94a3b8}.activity textarea,textarea,.input{width:100%;border:1px solid var(--line);border-radius:16px;padding:14px 16px;font-family:inherit;font-size:16px;background:#fff;color:var(--text)}textarea{min-height:130px;resize:vertical}.activity textarea{margin-top:10px}
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.timeline-item{background:white;border:1px solid var(--line);border-radius:20px;padding:22px}.timeline-item span{display:inline-grid;place-items:center;width:38px;height:38px;border-radius:12px;background:var(--primary);color:#fff;font-weight:800}.timeline-item p{font-weight:700;color:#334155}
.team-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.team-card{padding:24px}.team-card h2{font-size:22px;margin-bottom:8px}.team-card p{font-weight:800;color:#334155;margin-bottom:6px}.team-card span{display:block;color:var(--muted);margin-bottom:12px}.team-card a{display:block;color:var(--primary-dark);font-weight:800;word-break:break-word}.avatar{width:58px;height:58px;border-radius:20px;background:linear-gradient(135deg,var(--primary),#22c55e);color:#fff;display:grid;place-items:center;font-size:24px;font-weight:800;margin-bottom:16px}
.quiz-wrap{display:flex;justify-content:center}.quiz-card{width:min(900px,100%);padding:30px}.question{padding:22px 0;border-bottom:1px solid var(--line)}.question h3{font-size:19px}.option{display:flex;align-items:center;gap:10px;padding:12px;margin:8px 0;border:1px solid var(--line);border-radius:16px;cursor:pointer;background:#fff}.option:hover{border-color:var(--primary)}.option input{width:18px;height:18px}.result-box{margin-top:18px;padding:18px;border-radius:16px;background:#ecfdf5;color:var(--primary-dark);font-weight:800}.success{background:#ecfdf5;color:var(--primary-dark);border-radius:16px;padding:14px;margin-bottom:16px;font-weight:800}.form label,.quiz-card label:not(.option){display:block;margin:14px 0 6px;font-weight:800;color:#334155}
.table-card{overflow:auto;padding:0}table{width:100%;border-collapse:collapse;min-width:760px;background:white}th,td{padding:14px 16px;border-bottom:1px solid var(--line);text-align:right}th{background:#f8fafc;color:#0f172a}.references a{color:var(--primary-dark)}
.footer{display:flex;justify-content:space-between;gap:24px;padding:34px 6vw;background:#0f172a;color:white;margin-top:40px}.footer p{color:#cbd5e1;max-width:760px}.footer a{display:block;color:#ccfbf1;font-weight:800;margin:8px 0}
.reveal{opacity:0;transform:translateY(18px);transition:.6s ease}.reveal.visible{opacity:1;transform:translateY(0)}
@media (max-width:920px){.hero,.split,.wide-left{grid-template-columns:1fr}.grid-3,.module-grid,.team-grid,.timeline{grid-template-columns:1fr 1fr}.nav{display:none;position:absolute;top:76px;left:6vw;right:6vw;background:white;border:1px solid var(--line);border-radius:22px;padding:14px;box-shadow:var(--shadow)}.nav.open{display:grid}.menu-toggle{display:block}.brand{font-size:14px}.hero{padding-top:45px}.footer{display:block}}
@media (max-width:620px){.grid-3,.module-grid,.team-grid,.timeline,.stats{grid-template-columns:1fr}.hero h1,.page-head h1{font-size:30px}.section,.page-head,.hero{padding-left:20px;padding-right:20px}.topbar{padding-left:20px;padding-right:20px}.brand span:last-child{display:none}}