:root{--p:#1e40af;--p2:#3b82f6;--p-dark:#172554;--acc:#f59e0b;--ink:#0f172a;--muted:#64748b;--line:#e2e8f0;--bg:#f8fafc;--ok:#059669;--r:14px}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:Tajawal,"Segoe UI",Tahoma,Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.9;font-size:17px}
.container{max-width:1120px;margin:0 auto;padding:0 18px}
a{color:var(--p);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto}
/* ---------- header ---------- */
header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 1px 3px rgba(15,23,42,.04)}
.nav{display:flex;align-items:center;justify-content:space-between;min-height:64px;gap:14px}
.logo{font-size:1.3rem;font-weight:800;color:var(--p-dark);display:flex;align-items:center;gap:9px;white-space:nowrap}
.logo:hover{text-decoration:none}
.logo em{font-style:normal;font-weight:500;color:var(--muted);font-size:.8rem}
.logo-mark{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:9px;background:linear-gradient(135deg,var(--p),var(--p2));color:#fff;font-size:1.05rem;font-weight:700}
.nav-links{display:flex;gap:20px;list-style:none;align-items:center}
.nav-links a{color:var(--ink);font-weight:500;font-size:.94rem}
.nav-links a:hover,.nav-links a.active{color:var(--p);text-decoration:none}
.nav-links a.active{font-weight:700}
.menu-btn{display:none;background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--p-dark);line-height:1}
/* ---------- breadcrumbs ---------- */
.breadcrumbs{background:var(--bg);border-bottom:1px solid var(--line);font-size:.86rem;color:var(--muted);padding:9px 0}
.breadcrumbs a{color:var(--muted)}
.breadcrumbs .sep{margin:0 3px;opacity:.6}
/* ---------- hero ---------- */
.hero{background:linear-gradient(160deg,var(--p-dark) 0%,var(--p) 60%,#1d4ed8 100%);color:#fff;padding:44px 0 46px;text-align:center;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background-image:radial-gradient(circle at 12% 18%,rgba(255,255,255,.10) 2px,transparent 2px),radial-gradient(circle at 82% 72%,rgba(255,255,255,.08) 2px,transparent 2px);background-size:120px 120px;pointer-events:none}
.hero h1{font-size:2.15rem;font-weight:800;margin-bottom:12px;line-height:1.45;position:relative}
.hero p.lead{font-size:1.05rem;max-width:760px;margin:0 auto;color:#dbeafe;position:relative}
.hero .today-badge{display:inline-block;margin-top:20px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);border-radius:12px;padding:12px 22px;position:relative}
.hero .today-badge b{display:block;font-size:1.15rem;color:var(--acc)}
.hero .today-badge span{font-size:.92rem;color:#dbeafe}
.page-head{padding:34px 0 8px}
.page-head h1{font-size:1.85rem;font-weight:800;line-height:1.5;margin-bottom:10px}
.page-head .lead{color:var(--muted);font-size:1.02rem;max-width:820px}
/* ---------- tool card ---------- */
.tool{background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 14px 40px rgba(30,64,175,.10);padding:26px;margin:26px 0}
.tool h2{font-size:1.2rem;margin-bottom:16px;font-weight:800}
.switch{display:flex;gap:8px;background:var(--bg);padding:5px;border-radius:12px;margin-bottom:20px;flex-wrap:wrap}
.switch button{flex:1 1 150px;padding:11px 8px;border:none;background:none;border-radius:9px;font-family:inherit;font-size:.95rem;font-weight:700;color:var(--muted);cursor:pointer}
.switch button.on{background:var(--p);color:#fff;box-shadow:0 3px 10px rgba(30,64,175,.28)}
.row{display:grid;gap:14px;margin-bottom:16px}
.row.c2{grid-template-columns:repeat(2,1fr)}
.row.c3{grid-template-columns:repeat(3,1fr)}
.row.c4{grid-template-columns:repeat(4,1fr)}
.fld{display:flex;flex-direction:column;gap:6px}
.fld label{font-size:.88rem;font-weight:700;color:var(--muted)}
select,input[type=text],input[type=number],input[type=date],input[type=email],textarea{width:100%;padding:12px 13px;border:1.5px solid var(--line);border-radius:11px;font-family:inherit;font-size:1rem;background:#fff;color:var(--ink);outline:none}
select:focus,input:focus,textarea:focus{border-color:var(--p2);box-shadow:0 0 0 3px rgba(59,130,246,.16)}
.btn{display:inline-block;width:100%;padding:14px 22px;border:none;border-radius:12px;background:linear-gradient(135deg,var(--p),var(--p2));color:#fff;font-family:inherit;font-size:1.05rem;font-weight:800;cursor:pointer;box-shadow:0 6px 18px rgba(30,64,175,.28)}
.btn:hover{filter:brightness(1.07)}
.btn.sec{background:#fff;color:var(--p);border:1.5px solid var(--line);box-shadow:none}
.btn-row{display:grid;grid-template-columns:2fr 1fr;gap:10px}
.err{display:none;background:#fef2f2;border:1px solid #fecaca;color:#b91c1c;padding:11px 14px;border-radius:11px;margin-top:12px;font-size:.94rem}
.err.show{display:block}
/* ---------- result ---------- */
.result{display:none;margin-top:20px;background:linear-gradient(160deg,#eff6ff,#f8fafc);border:1.5px solid #bfdbfe;border-radius:16px;padding:22px;text-align:center}
.result.show{display:block}
.result .big{font-size:1.7rem;font-weight:800;color:var(--p-dark);line-height:1.6}
.result .sub{color:var(--muted);margin-top:6px;font-size:1rem}
.chips{display:flex;flex-wrap:wrap;gap:9px;justify-content:center;margin-top:16px}
.chip{background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 15px;font-size:.9rem;color:var(--ink)}
.chip b{color:var(--p)}
.res-table{margin-top:16px}
/* ---------- sections ---------- */
main section{padding:30px 0}
main section.alt{background:var(--bg);border-block:1px solid var(--line)}
h2{font-size:1.5rem;font-weight:800;margin-bottom:14px;line-height:1.6}
h3{font-size:1.16rem;font-weight:700;margin:22px 0 8px}
p{margin-bottom:14px}
ul.dots,ol.nums{margin:0 22px 16px 0;padding:0}
ul.dots li,ol.nums li{margin-bottom:9px}
.note{background:#fffbeb;border-right:4px solid var(--acc);border-radius:0 12px 12px 0;padding:14px 18px;margin:18px 0;color:#78350f}
table{width:100%;border-collapse:collapse;margin:16px 0;font-size:.95rem;background:#fff}
th,td{border:1px solid var(--line);padding:10px 12px;text-align:right}
th{background:var(--bg);font-weight:700}
tbody tr:nth-child(even){background:#fafbfc}
.tbl-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
/* ---------- tool grids ---------- */
.cat{margin-bottom:30px}
.cat h2{display:flex;align-items:center;gap:10px;font-size:1.35rem}
.cat h2 .ic{width:38px;height:38px;border-radius:11px;background:#eff6ff;display:inline-flex;align-items:center;justify-content:center;font-size:1.1rem}
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:13px}
.tool-link{display:flex;align-items:center;gap:11px;background:#fff;border:1px solid var(--line);border-radius:13px;padding:14px 16px;color:var(--ink);font-weight:600;font-size:.97rem;transition:.16s}
.tool-link:hover{text-decoration:none;border-color:var(--p2);box-shadow:0 6px 18px rgba(30,64,175,.10);transform:translateY(-2px)}
.tool-link .e{font-size:1.25rem;flex-shrink:0}
.tool-link .ar{margin-inline-start:auto;color:var(--muted)}
.feat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;margin-top:20px}
.feat{background:#fff;border:1px solid var(--line);border-radius:15px;padding:22px}
.feat .e{font-size:1.7rem;display:block;margin-bottom:8px}
.feat h3{margin:0 0 6px;font-size:1.05rem}
.feat p{color:var(--muted);font-size:.94rem;margin:0}
.steps{counter-reset:s;margin-top:18px}
.step{display:flex;gap:14px;margin-bottom:16px;align-items:flex-start}
.step .n{flex-shrink:0;width:34px;height:34px;border-radius:50%;background:var(--p);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.95rem}
.step p{margin:0}
.step b{display:block}
/* ---------- faq ---------- */
.faq details{background:#fff;border:1px solid var(--line);border-radius:13px;margin-bottom:10px;overflow:hidden}
.faq summary{padding:15px 18px;font-weight:700;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px;font-size:1rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--p);font-size:1.4rem;font-weight:400;flex-shrink:0}
.faq details[open] summary::after{content:"−"}
.faq .a{padding:0 18px 16px;color:var(--muted)}
.faq .a p:last-child{margin-bottom:0}
/* ---------- related ---------- */
.related{background:var(--bg);border:1px solid var(--line);border-radius:15px;padding:20px;margin:26px 0}
.related h3{margin:0 0 12px;font-size:1.08rem}
.related .tool-grid{grid-template-columns:repeat(auto-fill,minmax(215px,1fr));gap:10px}
/* ---------- footer ---------- */
footer{background:var(--p-dark);color:#cbd5e1;padding:44px 0 22px;margin-top:44px;font-size:.94rem}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr 1fr;gap:28px;margin-bottom:28px}
.f-logo{color:#fff;margin-bottom:10px;font-size:1.2rem}
.f-about p{color:#94a3b8;font-size:.9rem;line-height:1.8}
footer .f-h{color:#fff;font-size:.98rem;margin-bottom:10px;margin-top:0;font-weight:700}
footer ul{list-style:none}
footer li{margin-bottom:7px}
footer a{color:#cbd5e1}
footer a:hover{color:#fff}
.copy{border-top:1px solid #1e3a8a;padding-top:18px;text-align:center;font-size:.87rem;color:#94a3b8}
.copy a{color:#94a3b8}
/* ---------- misc ---------- */
.search-box{position:relative;margin:0 0 26px}
.search-box input{padding-inline-start:42px;font-size:1.02rem}
.search-box::before{content:"🔍";position:absolute;inset-inline-start:14px;top:50%;transform:translateY(-50%);opacity:.55}
.empty{display:none;color:var(--muted);text-align:center;padding:22px}
.empty.show{display:block}
.prose{max-width:820px}
.mono{font-variant-numeric:tabular-nums}
.center{text-align:center}
.hidden{display:none!important}
/* ---------- responsive ---------- */
@media(max-width:900px){
  .footer-grid{grid-template-columns:1fr 1fr}
  .row.c4{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  body{font-size:16px}
  .menu-btn{display:block}
  .nav-links{display:none;position:absolute;top:64px;inset-inline:0;background:#fff;flex-direction:column;align-items:stretch;padding:12px 18px 18px;border-bottom:1px solid var(--line);gap:2px;box-shadow:0 10px 24px rgba(15,23,42,.09)}
  .nav-links.open{display:flex}
  .nav-links li{border-bottom:1px solid var(--line)}
  .nav-links li:last-child{border-bottom:none}
  .nav-links a{display:block;padding:11px 2px;font-size:1rem}
  .hero h1{font-size:1.55rem}
  .hero p.lead{font-size:.98rem}
  .page-head h1{font-size:1.42rem}
  h2{font-size:1.25rem}
  .tool{padding:18px;border-radius:15px}
  .row.c2,.row.c3,.row.c4{grid-template-columns:1fr}
  .row.dt{grid-template-columns:repeat(3,1fr)}
  .btn-row{grid-template-columns:1fr}
  .result .big{font-size:1.3rem}
  table{font-size:.88rem}
  th,td{padding:8px 9px}
}
@media(max-width:520px){
  .footer-grid{grid-template-columns:1fr}
  .tool-grid{grid-template-columns:1fr}
}
/* ---------- quizzes & game ---------- */
.quiz-opts{display:grid;gap:10px;margin-top:16px}
.quiz-opts .btn{text-align:center;font-weight:600;font-size:1rem}
.quiz-opts .btn:hover{border-color:var(--p2);color:var(--p)}
.quiz-prog{font-size:.9rem;color:var(--muted);font-weight:700;margin-bottom:6px}
.quiz-q{font-size:1.15rem;font-weight:700;line-height:1.7}
.game-hud{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:16px 0}
.game-hud .box{background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:12px;text-align:center}
.game-hud .box span{display:block;font-size:.82rem;color:var(--muted)}
.game-hud .box b{font-size:1.5rem;color:var(--p-dark)}
.game-q{font-size:2rem;font-weight:800;text-align:center;margin:16px 0;color:var(--p-dark);font-variant-numeric:tabular-nums}
.game-feed{text-align:center;min-height:26px;font-weight:700;margin-top:10px}
/* ---------- guides ---------- */
.guide-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px;margin-top:22px}
.guide-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:15px;overflow:hidden;transition:.16s}
.guide-card:hover{text-decoration:none;border-color:var(--p2);box-shadow:0 8px 24px rgba(30,64,175,.10);transform:translateY(-2px)}
.guide-card .top{background:linear-gradient(135deg,var(--p-dark),var(--p2));color:#fff;padding:20px;font-size:2rem;text-align:center}
.guide-card .bd{padding:18px;flex:1}
.guide-card h3{margin:0 0 7px;font-size:1.06rem;color:var(--ink)}
.guide-card p{margin:0;color:var(--muted);font-size:.93rem}
.toc{background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:18px 22px;margin:22px 0}
.toc h2{font-size:1.05rem;margin-bottom:10px}
.toc ol{margin:0 20px 0 0;padding:0}
.toc li{margin-bottom:6px}
.meta-line{color:var(--muted);font-size:.9rem;margin-bottom:18px}
.prose h2{scroll-margin-top:80px}
.cta{background:linear-gradient(135deg,#eff6ff,#f8fafc);border:1.5px solid #bfdbfe;border-radius:15px;padding:22px;text-align:center;margin:26px 0}
.cta h3{margin:0 0 8px}
.cta p{margin:0 0 14px;color:var(--muted)}
.cta .btn{width:auto;padding:12px 30px;display:inline-block}
.hidden-h{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
/* ---------- tap targets ---------- */
.breadcrumbs a,.breadcrumbs span{display:inline-block;padding:4px 2px}
footer li a{display:inline-block;padding:3px 0}
.copy a{display:inline-block;padding:4px 2px}
.toc a{display:inline-block;padding:3px 0}