:root{--bg:#f5f7f9;--paper:#fff;--ink:#24313a;--muted:#66737d;--navy:#18354a;--teal:#2f706c;--gold:#9f7c46;--line:#d8e0e6;--soft:#edf3f5;--warn:#945553;--ok:#3f7f5c;--shadow:0 8px 28px rgba(27,48,63,.07)}
*{box-sizing:border-box} html{scroll-behavior:smooth} body{margin:0;background:var(--bg);color:var(--ink);font-family:"Noto Sans Arabic","Tahoma",Arial,sans-serif;direction:rtl;line-height:1.85} a{color:inherit;text-decoration:none}
.layout{display:grid;grid-template-columns:310px minmax(0,1fr);min-height:100vh}.sidebar{position:sticky;top:0;height:100vh;background:#fff;border-left:1px solid var(--line);padding:24px 18px;overflow:auto}.brand{padding:8px 10px 20px;border-bottom:1px solid var(--line);margin-bottom:16px}.brand h1{font-size:20px;margin:0;color:var(--navy)}.brand p{font-size:12px;color:var(--muted);margin:4px 0 0}.nav a{display:flex;gap:10px;align-items:flex-start;padding:8px 10px;border-radius:8px;font-size:13px;color:#52616c}.nav a:hover{background:var(--soft);color:var(--navy)}.nav .num{font-family:Arial,sans-serif;color:var(--teal);font-weight:700;min-width:23px;direction:ltr}.content{min-width:0}.hero{background:linear-gradient(180deg,#fff 0%,#f2f6f8 100%);border-bottom:1px solid var(--line);padding:64px clamp(24px,5vw,78px) 44px}.eyebrow{font-family:Arial,sans-serif;direction:ltr;display:inline-block;color:var(--teal);font-size:12px;font-weight:700;letter-spacing:.12em;border:1px solid #cbdadd;padding:5px 10px;border-radius:999px;background:#fff}.hero h2{font-size:clamp(34px,4.5vw,62px);line-height:1.18;color:var(--navy);margin:18px 0 12px;max-width:1050px}.hero .lead{font-size:18px;max-width:960px;color:#52616b}.chain{direction:ltr;text-align:left;background:#fff;border:1px solid var(--line);border-right:5px solid var(--teal);padding:18px 20px;margin-top:26px;border-radius:10px;font:700 14px/1.7 Arial,sans-serif;color:var(--navy);box-shadow:var(--shadow)}
main{max-width:1240px;margin:auto;padding:36px clamp(20px,4vw,56px) 80px}.research-note{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:28px}.metric{background:#fff;border:1px solid var(--line);padding:18px;border-radius:12px}.metric b{display:block;color:var(--navy);font-size:22px;font-family:Arial,sans-serif}.metric span{font-size:12px;color:var(--muted)}
.figure{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;margin:24px 0;box-shadow:var(--shadow)}.figure img{width:100%;display:block;border-radius:10px}.caption{font-size:12px;color:var(--muted);padding:10px 2px 0}.section{scroll-margin-top:24px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:30px;margin:20px 0;box-shadow:0 3px 15px rgba(20,38,52,.035)}.section-head{display:flex;gap:16px;align-items:center;border-bottom:1px solid var(--line);padding-bottom:12px;margin-bottom:18px}.section-no{direction:ltr;font:700 14px Arial,sans-serif;color:var(--teal);border:1px solid #b9d1cf;background:#f4faf9;border-radius:8px;padding:6px 9px}.section h3{margin:0;color:var(--navy);font-size:24px}.section p{margin:0 0 13px}.callout{border-right:4px solid var(--gold);background:#fcfaf6;padding:14px 18px;border-radius:8px;margin:18px 0}.callout strong{color:var(--navy)}
.flow{direction:ltr;display:flex;gap:8px;align-items:stretch;overflow:auto;padding:18px 2px}.flow .node{min-width:145px;border:1px solid #c7d4dd;background:#fff;border-radius:10px;padding:13px;text-align:center;font:700 12px/1.4 Arial,sans-serif;color:var(--navy)}.flow .arr{align-self:center;color:var(--gold);font:700 22px Arial,sans-serif}.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.grid3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.card{border:1px solid var(--line);background:#fbfcfd;border-radius:10px;padding:16px}.card h4{margin:0 0 8px;color:var(--navy);font-size:15px}.card p{font-size:13px;color:#52616b;margin:0}.tag{display:inline-block;border:1px solid #cad6de;border-radius:999px;padding:2px 8px;font:700 11px Arial,sans-serif;color:var(--teal);background:#fff}
table{border-collapse:collapse;width:100%;font-size:13px;margin:14px 0}th,td{border:1px solid var(--line);padding:10px;vertical-align:top}th{background:#eef3f5;color:var(--navy);font-weight:700}.english{font-family:Arial,sans-serif;direction:ltr;unicode-bidi:embed}.danger{color:var(--warn);font-weight:700}.ok{color:var(--ok);font-weight:700}.bar-chart{display:grid;gap:10px;margin:16px 0}.bar-row{display:grid;grid-template-columns:170px 1fr 60px;gap:10px;align-items:center;direction:ltr;font-family:Arial,sans-serif;font-size:12px}.bar-track{height:12px;background:#edf1f4;border-radius:999px;overflow:hidden}.bar{height:100%;background:linear-gradient(90deg,var(--teal),#6e9f9c);border-radius:999px}.diagram{direction:ltr;display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:16px 0}.diagram .box{border:1px solid var(--line);padding:14px;border-radius:10px;background:#fafcfd;text-align:center;font-family:Arial,sans-serif;font-size:12px}.diagram .box strong{display:block;color:var(--navy);margin-bottom:4px}.status{font-size:11px;border-radius:999px;padding:3px 8px;display:inline-block;margin-right:6px}.verified{background:#edf7f1;color:var(--ok);border:1px solid #b9d8c4}.method{background:#f4f1e9;color:#806637;border:1px solid #dccca9}.proposed{background:#f8eeee;color:var(--warn);border:1px solid #e0c0c0}.footer{padding:36px;color:var(--muted);font-size:12px;text-align:center;border-top:1px solid var(--line);background:#fff}
@media(max-width:980px){.layout{display:block}.sidebar{position:relative;height:auto;border-left:0;border-bottom:1px solid var(--line)}.nav{columns:2}.research-note,.grid3{grid-template-columns:1fr}.grid2{grid-template-columns:1fr}.hero{padding-top:38px}}
@media(max-width:620px){.nav{columns:1}.hero h2{font-size:34px}.section{padding:20px}.bar-row{grid-template-columns:120px 1fr 45px}.diagram{grid-template-columns:1fr}}
@media print{.sidebar{display:none}.layout{display:block}.section{break-inside:avoid;box-shadow:none}.hero{padding:30px}.content{width:100%}}