:root{--blue: #2563eb;--blue-deep: #1d4ed8;--blue-soft: #dbeafe;--amber: #f59e0b;--amber-deep: #b45309;--amber-soft: #fef3c7;--pink: #ec4899;--pink-soft: #fce7f3;--mint: #0f9f76;--mint-soft: #d1fae5;--bg: #eff6ff;--ink: #0f172a;--muted: #56698a;--card: #ffffff;--border: #e0eafb;--radius-lg: 28px;--radius: 20px;--radius-sm: 14px;--shadow-soft: 0 22px 45px -30px rgba(37, 99, 235, .45), 0 2px 8px rgba(15, 23, 42, .04);--shadow-clay: 0 18px 32px -20px rgba(37, 99, 235, .5), inset 0 -5px 0 rgba(37, 99, 235, .06), inset 0 2px 0 #ffffff;--font-head: "Baloo Bhaijaan 2", "Tajawal", system-ui, sans-serif;--font-body: "Tajawal", "Segoe UI", system-ui, sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-body);font-size:17px;line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}h1,h2,h3,h4{font-family:var(--font-head);line-height:1.25;margin:0;font-weight:700;letter-spacing:0}p{margin:0}button{font-family:inherit}a{color:inherit;text-decoration:none}.container{width:min(1140px,100% - 40px);margin-inline:auto}.app{position:relative;min-height:100vh}.blobs{position:fixed;top:0;right:0;bottom:0;left:0;z-index:-1;overflow:hidden;pointer-events:none}.blob{position:absolute;border-radius:50%;filter:blur(70px);opacity:.5}.blob-a{width:460px;height:460px;background:#bfdbfe;top:-140px;right:-120px}.blob-b{width:420px;height:420px;background:#fde68a;top:34%;left:-180px;opacity:.4}.blob-c{width:520px;height:520px;background:#fbcfe8;bottom:-200px;right:20%;opacity:.32}.nav-wrap{position:sticky;top:0;z-index:60;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:#eff6ffd1;border-bottom:1px solid rgba(224,234,251,.9)}.nav{display:flex;align-items:center;gap:18px;height:74px}.brand{display:flex;align-items:center;gap:11px}.brand-mark{display:grid;place-items:center;width:42px;height:42px;border-radius:14px;color:#fff;background:linear-gradient(145deg,#3b82f6,#1d4ed8);box-shadow:0 10px 20px -8px #2563ebcc,inset 0 -3px #00000029}.brand-text{display:flex;flex-direction:column;line-height:1.15}.brand-text strong{font-family:var(--font-head);font-size:1.28rem}.brand-text small{font-size:.72rem;color:var(--muted);letter-spacing:.02em}.nav-links{display:flex;align-items:center;gap:6px;list-style:none;margin:0;padding:0;margin-inline-start:auto}.nav-links a{display:inline-block;padding:9px 14px;border-radius:999px;font-size:.95rem;font-weight:500;color:#33456b;transition:background .2s ease,color .2s ease,transform .2s ease}.nav-links a:hover{background:#fff;color:var(--blue-deep);transform:translateY(-1px)}.nav-cta{margin-inline-start:6px}.nav-toggle{display:none;border:1px solid var(--border);background:#fff;color:var(--ink);border-radius:12px;width:42px;height:42px;place-items:center;cursor:pointer}.btn{display:inline-flex;align-items:center;gap:8px;border:0;border-radius:999px;padding:12px 20px;font-family:var(--font-body);font-weight:700;font-size:.98rem;cursor:pointer;transition:transform .18s 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34px;text-align:center}.eyebrow,.section-tag{display:inline-flex;align-items:center;gap:7px;padding:7px 15px;border-radius:999px;background:#fff;border:1px solid var(--border);color:var(--blue-deep);font-size:.85rem;font-weight:700;box-shadow:0 8px 18px -14px #2563ebcc}h1{font-size:clamp(2.4rem,6.4vw,4.3rem);margin:18px 0 14px;font-weight:800;letter-spacing:-.01em}.grad{background:linear-gradient(120deg,#f59e0b,#ec4899 55%,#2563eb);-webkit-background-clip:text;background-clip:text;color:transparent;padding-inline:2px}.lead{color:var(--muted);font-size:clamp(1rem,2vw,1.14rem);max-width:620px;margin-inline:auto}.lead strong{color:var(--ink);font-variant-numeric:tabular-nums}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-clay)}.highlights{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:26px}.highlight{display:flex;align-items:center;gap:12px;background:#ffffffb8;border:1px solid rgba(224,234,251,.9);border-radius:var(--radius);padding:14px 16px}.highlight-icon{display:grid;place-items:center;width:40px;height:40px;border-radius:13px;background:var(--blue-soft);color:var(--blue-deep);flex:none}.highlight strong{display:block;font-family:var(--font-head);font-size:1rem}.highlight div span{display:block;font-size:.85rem;color:var(--muted)}.explorer{padding:26px;position:relative;overflow:hidden}.explorer:before{content:"";position:absolute;inset:0 0 auto 0;height:4px;background:linear-gradient(90deg,#f59e0b,#ec4899 40%,#2563eb 80%,#10b981)}.explorer-head{display:flex;gap:22px;align-items:flex-end;justify-content:space-between;flex-wrap:wrap}.field{display:flex;flex-direction:column;gap:7px}.field>label{font-family:var(--font-head);font-weight:700;font-size:.95rem;color:#33456b}.input-shell{display:flex;align-items:center;gap:8px;background:#f6f9ff;border:2px solid #dbe6f9;border-radius:16px;padding:4px 8px 4px 14px;transition:border-color .2s ease,box-shadow .2s ease}.input-shell:focus-within{border-color:#93b8f8;box-shadow:0 0 0 4px #2563eb1f}.input-shell input{background:transparent;border:0;outline:none;width:240px;font-family:var(--font-head);font-size:1.6rem;font-weight:700;color:var(--ink);font-variant-numeric:tabular-nums;direction:ltr;text-align:left;padding:6px 2px}.hint{font-size:.82rem;color:var(--muted)}.icon-btn{display:grid;place-items:center;width:36px;height:36px;border-radius:11px;border:1px solid var(--border);background:#fff;color:var(--muted);cursor:pointer;transition:all .18s ease;flex:none}.icon-btn:hover{color:var(--blue-deep);border-color:#bcd2f7;background:#f2f7ff}.icon-btn-solid{background:var(--blue-soft);color:var(--blue-deep);border-color:transparent}.gender-block{display:flex;flex-direction:column;gap:7px;align-items:flex-start}.segmented{display:inline-flex;padding:4px;gap:4px;background:#f1f6ff;border:1px solid var(--border);border-radius:999px}.segmented button{border:0;background:transparent;color:#4b5f83;font-size:.88rem;font-weight:700;padding:8px 16px;border-radius:999px;cursor:pointer;transition:all .18s ease}.segmented button.is-active{background:#fff;color:var(--blue-deep);box-shadow:0 6px 14px -8px #2563ebcc}.stage{margin-top:22px;padding:30px 24px 26px;border-radius:var(--radius);background:radial-gradient(120% 140% at 85% -20%,#eef5ff 0%,transparent 60%),linear-gradient(180deg,#fbfdff,#f3f8ff);border:1px solid #e7f0fe;text-align:center}.digits{font-family:var(--font-head);font-weight:800;font-size:clamp(2.6rem,8.5vw,5rem);line-height:1.05;letter-spacing:.01em;direction:ltr;background:linear-gradient(135deg,#1e40af,#2563eb 45%,#7c3aed);-webkit-background-clip:text;background-clip:text;color:transparent;font-variant-numeric:tabular-nums}.spoken{margin-top:12px;font-family:var(--font-head);font-weight:600;font-size:clamp(1.3rem,3.4vw,2.1rem);color:#16233d;line-height:1.6;animation:fadeUp .4s ease both}.stage-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.breakdown{margin-top:18px}.breakdown-title{display:flex;align-items:center;gap:6px;font-size:.82rem;font-weight:700;color:var(--muted);margin-bottom:9px}.chips{display:flex;flex-wrap:wrap;align-items:center;gap:8px}.chip-wrap{display:inline-flex;align-items:center;gap:8px}.join{color:#64748b;font-family:var(--font-head);font-weight:700}.chip{display:inline-flex;flex-direction:column;align-items:flex-start;gap:1px;padding:8px 14px;border-radius:14px;border:1.5px solid #dbe6f9;background:#fff;cursor:pointer;text-align:right;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}.chip:hover{transform:translateY(-2px);box-shadow:0 12px 22px -16px #2563ebcc}.chip-label{font-size:.68rem;font-weight:700;color:var(--muted)}.chip-text{font-family:var(--font-head);font-weight:700;font-size:1rem;color:var(--ink)}.chip-millions{background:var(--pink-soft);border-color:#f7c6df}.chip-thousands{background:var(--amber-soft);border-color:#fbe0a6}.chip-hundreds{background:#e8f0ff;border-color:#cadcfb}.chip-small{background:var(--mint-soft);border-color:#b7ecd7}.slider-block{margin-top:22px}.slider-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}.slider-value{font-family:var(--font-head);font-weight:700;color:var(--blue-deep);font-variant-numeric:tabular-nums}.slider{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:100%;height:12px;border-radius:999px;background:linear-gradient(90deg,#bfdbfe,#93c5fd 40%,#6366f1 75%,#ec4899);outline:none;cursor:pointer;border:1px solid #dbe6f9}.slider::-webkit-slider-thumb{-webkit-appearance:none;width:26px;height:26px;border-radius:50%;background:#fff;border:4px solid var(--blue);box-shadow:0 6px 14px -6px #2563ebe6;cursor:grab;transition:transform .15s ease}.slider::-webkit-slider-thumb:hover{transform:scale(1.08)}.slider::-moz-range-thumb{width:22px;height:22px;border-radius:50%;background:#fff;border:4px solid var(--blue);cursor:grab}.slider-ends{display:flex;justify-content:space-between;font-size:.76rem;color:var(--muted);margin-top:5px}.presets{margin-top:20px;padding-top:18px;border-top:1px dashed #dfe9f8}.preset-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}.preset{padding:7px 14px;border-radius:999px;border:1.5px solid #dbe6f9;background:#fff;font-weight:700;font-size:.85rem;color:#3d5177;cursor:pointer;font-variant-numeric:tabular-nums;transition:all .18s ease}.preset:hover{border-color:#93b8f8;color:var(--blue-deep);transform:translateY(-1px)}.preset.is-active{background:var(--blue);border-color:var(--blue);color:#fff}.explorer-note{margin-top:16px;font-size:.85rem;color:var(--muted);background:#f7faff;border-radius:14px;padding:11px 14px}.explorer-note strong{color:var(--blue-deep);font-family:var(--font-head)}.section{padding:68px 0 0}.section-head{max-width:660px;margin-bottom:26px}.section-head h2{font-size:clamp(1.6rem,3.6vw,2.4rem);margin:14px 0 8px}.section-head p{color:var(--muted)}.rules-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.rule-card{padding:20px;display:flex;flex-direction:column;gap:9px;transition:transform .22s ease,box-shadow .22s ease}.rule-card:hover{transform:translateY(-4px);box-shadow:0 30px 50px -30px #2563eb99,inset 0 -5px 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ease}.link-btn:hover{gap:9px;color:var(--blue-deep)}.journey{background:#fff;border:1px solid var(--border);border-radius:var(--radius-lg);padding:12px;box-shadow:var(--shadow-soft);display:flex;flex-direction:column;gap:6px}.journey-row{display:grid;grid-template-columns:118px 1fr auto 22px;align-items:center;gap:16px;text-align:right;border:0;background:transparent;border-radius:16px;padding:12px 14px;cursor:pointer;transition:background .18s ease,transform .18s ease;color:inherit;font-family:inherit}.journey-row:hover{background:#f5f9ff;transform:translate(-3px)}.journey-rank{font-size:.8rem;font-weight:700;color:var(--muted)}.journey-mid{display:flex;flex-direction:column;gap:6px;min-width:0}.journey-words{font-family:var(--font-head);font-weight:700;font-size:1.05rem}.journey-bar{height:7px;border-radius:999px;background:#eef4ff;overflow:hidden}.journey-fill{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,#f59e0b,#ec4899 55%,#2563eb);transition:width .4s ease}.journey-digits{font-family:var(--font-head);font-weight:800;font-size:1.15rem;color:var(--blue-deep);direction:ltr;font-variant-numeric:tabular-nums}.journey-arrow{color:#a9bcd8}.journey-row:hover .journey-arrow{color:var(--blue)}.tables-card{padding:20px}.tabs{display:flex;flex-wrap:wrap;gap:7px;padding-bottom:14px;border-bottom:1px solid #eef3fc}.tab{border:1.5px solid transparent;background:#f4f8ff;color:#46608c;border-radius:999px;padding:8px 16px;font-size:.88rem;font-weight:700;cursor:pointer;transition:all .18s ease}.tab:hover{background:#e9f1ff;color:var(--blue-deep)}.tab.is-active{background:#1e293b;color:#fff;box-shadow:0 10px 20px -12px #0f172ae6}.numbers-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:16px}.number-cell{position:relative;display:flex;align-items:center;gap:10px;text-align:right;border:1.5px solid #e6eefc;background:#fbfdff;border-radius:14px;padding:11px 14px;cursor:pointer;transition:all .18s 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ease}.option:hover:not(:disabled){border-color:#9dc0fa;transform:translateY(-2px);box-shadow:0 16px 26px -22px #2563ebe6}.option.is-correct{background:var(--mint-soft);border-color:#5fd3ac;color:#065f46}.option.is-wrong{background:#fee2e2;border-color:#f7a3a3;color:#991b1b}.option.is-dim{opacity:.55}.option:disabled{cursor:default}.quiz-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:18px;flex-wrap:wrap}.feedback{display:flex;flex-direction:column;gap:1px;border-radius:14px;padding:9px 16px;font-size:.9rem}.feedback.ok{background:var(--mint-soft);color:#065f46}.feedback.bad{background:#fee2e2;color:#991b1b}.feedback strong{font-family:var(--font-head);font-size:1rem}.footer{margin-top:84px;background:radial-gradient(120% 160% at 90% -30%,#1e3a8a,#0f172a 55%);color:#dbe6f7;padding:46px 0 22px}.footer-inner{display:grid;grid-template-columns:1.1fr 1fr;gap:30px}.footer-brand{display:flex;gap:14px;align-items:flex-start}.footer-brand strong{font-family:var(--font-head);font-size:1.3rem;color:#fff;display:block}.footer-brand p{font-size:.9rem;color:#9fb3d1;max-width:340px;margin-top:4px}.footer-cols{display:grid;grid-template-columns:1fr 1fr;gap:20px}.footer-cols strong{display:block;font-family:var(--font-head);color:#fff;margin-bottom:8px;font-size:.98rem}.footer-cols a,.footer-cols span{display:flex;align-items:center;gap:6px;font-size:.86rem;color:#9fb3d1;padding:3px 0;transition:color .18s ease}.footer-cols a:hover{color:#fff}.footer-bottom{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:30px;padding-top:16px;border-top:1px solid rgba(255,255,255,.1);font-size:.8rem;color:#8298b8;flex-wrap:wrap}.footer-bottom span{display:inline-flex;align-items:center;gap:5px}.toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%);z-index:90;background:#0f172a;color:#fff;padding:11px 22px;border-radius:999px;font-size:.9rem;font-weight:600;box-shadow:0 18px 36px -14px #0f172ab3;animation:toastIn .28s ease both;max-width:calc(100% - 32px);text-align:center}.toast-ok{background:#065f46}.toast-warn{background:#92400e}@keyframes toastIn{0%{opacity:0;transform:translate(-50%,14px)}to{opacity:1;transform:translate(-50%)}}@keyframes fadeUp{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 980px){.rules-grid,.numbers-grid{grid-template-columns:repeat(2,1fr)}.footer-inner{grid-template-columns:1fr}}@media (max-width: 820px){.nav-links{position:absolute;top:74px;inset-inline:16px;flex-direction:column;align-items:stretch;gap:4px;padding:12px;background:#fff;border:1px solid var(--border);border-radius:20px;box-shadow:0 24px 40px -22px #0f172a66;display:none}.nav-links.is-open{display:flex}.nav-links a{padding:11px 14px;border-radius:12px}.nav-toggle{display:grid;margin-inline-start:auto}.nav-cta{display:none}.highlights,.quiz-options{grid-template-columns:1fr}.journey-row{grid-template-columns:96px 1fr auto;gap:12px}.journey-arrow{display:none}}@media (max-width: 600px){body{font-size:16px}.container{width:calc(100% - 28px)}.hero{padding-top:34px}.explorer{padding:18px}.explorer-head{gap:14px}.input-shell input{width:100%;font-size:1.4rem}.field,.input-shell{width:100%}.stage{padding:22px 14px}.stage-actions .btn{flex:1;justify-content:center}.rules-grid,.numbers-grid{grid-template-columns:1fr}.tables-card,.quiz-card{padding:16px}.journey-row{grid-template-columns:1fr auto}.journey-rank{display:none}.quiz-number{font-size:2rem}.section{padding-top:52px}.footer-cols{grid-template-columns:1fr}}@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}