:root{--bg:#f7f9fd;--surface:#fff;--ink:#17233d;--muted:#68758d;--line:#e5eaf3;--blue:#2864e8;--blue2:#eaf1ff;--navy:#122548;--shadow:0 18px 50px rgba(31,56,102,.08);--green:#16896a}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;line-height:1.6}a{color:inherit;text-decoration:none}.blue{color:var(--blue)}.topbar{height:76px;display:flex;align-items:center;justify-content:space-between;padding:0 max(5vw,24px);background:rgba(255,255,255,.94);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(12px)}.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.5px;font-size:18px}.brand-mark{width:34px;height:34px;display:grid;place-items:center;background:var(--blue);color:#fff;border-radius:11px;font-size:23px}.topbar nav{display:flex;gap:27px;font-size:13px;font-weight:650;color:#56647b}.topbar nav a:hover,footer a:hover{color:var(--blue)}.theme-btn{border:1px solid var(--line);background:#fff;border-radius:10px;width:38px;height:38px;font-size:20px;cursor:pointer}.hero{min-height:535px;padding:80px max(7vw,28px) 65px;display:grid;grid-template-columns:1fr .9fr;align-items:center;gap:40px;background:linear-gradient(120deg,#f8faff 0%,#f2f6ff 55%,#edf3ff 100%);overflow:hidden}.eyebrow{font-size:11px;letter-spacing:2px;color:var(--blue);font-weight:800}.hero h1{font-size:clamp(42px,5vw,68px);letter-spacing:-3px;line-height:1.06;margin:16px 0}.hero-copy>p{max-width:570px;color:var(--muted);font-size:17px}.hero-actions{display:flex;gap:12px;margin:27px 0}.btn{border:0;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;gap:13px;padding:13px 19px;font-weight:750;font-size:13px;cursor:pointer;transition:.18s}.btn:hover{transform:translateY(-1px)}.primary{background:var(--blue);color:#fff;box-shadow:0 7px 18px #2864e82b}.secondary{background:#fff;border:1px solid var(--line);color:var(--ink)}.small{padding:10px 14px;font-size:12px;margin-top:12px}.trust-row{display:flex;flex-wrap:wrap;gap:18px;color:#64718a;font-size:11px;font-weight:650}.hero-art{height:370px;position:relative;display:grid;place-items:center}.calc-preview{position:relative;z-index:2;width:285px;padding:19px;background:#fff;border:1px solid #e3eafa;border-radius:22px;box-shadow:0 30px 70px #203c7526;transform:rotate(2deg)}.mini-top{display:flex;align-items:center;gap:5px;margin-bottom:24px}.mini-top span{width:6px;height:6px;border-radius:50%;background:#d5dfef}.mini-top b{margin-left:auto;color:var(--blue);font-size:10px}.mini-expression{font-size:12px;color:#7a879e}.mini-result{font-size:36px;font-weight:800;text-align:right;margin:4px 0 22px}.mini-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.mini-grid i{font-style:normal;text-align:center;padding:10px 0;background:#f2f6fd;border-radius:7px;color:#52627e;font-size:12px}.orbit{position:absolute;border:1px solid #cad9fb;border-radius:50%;width:330px;height:330px}.orbit-b{width:410px;height:410px;border-color:#dce6fa}.floating{position:absolute;background:#fff;border:1px solid #e5eaf5;box-shadow:var(--shadow);border-radius:10px;padding:10px 15px;font-size:13px;font-weight:750;color:#465a7e;z-index:3}.f1{top:42px;left:8%}.f2{right:0;top:125px}.f3{left:4%;bottom:45px}.stats-strip{display:grid;grid-template-columns:repeat(4,1fr);padding:24px max(7vw,28px);background:#fff;border-bottom:1px solid var(--line)}.stats-strip div{display:flex;align-items:center;gap:12px;border-right:1px solid var(--line);padding:0 20px}.stats-strip div:first-child{padding-left:0}.stats-strip div:last-child{border:0}.stats-strip strong{color:var(--blue);font-size:18px}.stats-strip span{font-size:12px;color:#64718a;font-weight:650}.section{padding:82px max(7vw,28px)}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:32px}.section-heading h2{font-size:34px;letter-spacing:-1.2px;margin:7px 0}.section-heading p{color:var(--muted);margin:0;max-width:680px;font-size:14px}.pill{border:1px solid #d7e3ff;color:var(--blue);background:#fff;padding:7px 12px;border-radius:30px;font-size:11px;font-weight:750}.calculator-layout{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(260px,.75fr);gap:22px}.calc-panel,.history-panel{background:var(--surface);border:1px solid var(--line);border-radius:17px;box-shadow:var(--shadow);padding:20px}.calc-toolbar{display:flex;align-items:center;gap:16px;flex-wrap:wrap;padding-bottom:14px}.calc-toolbar label{display:flex;align-items:center;gap:7px;color:var(--muted);font-size:11px;font-weight:700}.calc-toolbar select{border:1px solid var(--line);padding:7px 8px;border-radius:7px;color:var(--ink);background:#fff;font-size:11px}.text-button{margin-left:auto;border:0;background:none;color:var(--blue);font-size:11px;cursor:pointer}.display{background:#f6f8fc;border:1px solid #e7edf7;border-radius:12px;padding:15px 17px;margin-bottom:15px}.display-meta{display:flex;justify-content:space-between;font-size:10px;color:#8190a9;font-weight:800;letter-spacing:.7px}.display input{border:0;background:transparent;width:100%;font:500 17px ui-monospace,SFMono-Regular,Consolas,monospace;outline:none;margin:13px 0 8px;color:var(--ink)}.result-line{display:flex;align-items:center;justify-content:space-between;gap:12px}.result-line #status{font-size:11px;color:var(--muted)}#result{font-size:27px;font-weight:800;letter-spacing:-.5px;overflow-wrap:anywhere;text-align:right}.keypad{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:8px}.keypad button{min-height:43px;border:1px solid #e6ebf4;border-radius:8px;background:#fff;color:#40516e;font-weight:700;font-size:12px;cursor:pointer}.keypad button:hover{background:var(--blue2);border-color:#b8ccff;color:var(--blue)}.keypad button:nth-child(-n+6),.keypad button:nth-child(n+7):nth-child(-n+12){background:#f5f8ff}.keypad .equals{background:var(--blue);color:white;border-color:var(--blue);font-size:18px}.keypad .equals:hover{background:#174fc9;color:white}.keypad .zero{grid-column:span 2}.memory-row{display:flex;gap:7px;margin-top:12px;flex-wrap:wrap}.memory-row button{background:#fff;border:1px solid var(--line);border-radius:7px;padding:8px 11px;font-size:10px;font-weight:750;color:#61708a;cursor:pointer}.history-panel{display:flex;flex-direction:column;min-height:100%}.panel-heading{display:flex;justify-content:space-between;align-items:center}.panel-heading h3{font-size:14px;margin:2px 0 15px}.history-count{background:var(--blue2);color:var(--blue);padding:2px 8px;border-radius:20px;font-size:10px}.history-list{flex:1}.history-item{padding:12px 0;border-bottom:1px solid var(--line);cursor:pointer}.history-item small{display:block;color:#8a96aa;font-size:10px;overflow-wrap:anywhere}.history-item strong{display:block;text-align:right;font-size:17px}.empty-state{color:#8a96aa;font-size:12px;padding:25px 0;text-align:center}.tip-card{display:flex;gap:10px;background:#f3f7ff;border-radius:10px;padding:13px;margin-top:20px}.tip-icon{color:var(--blue);font-size:20px}.tip-card b{font-size:11px}.tip-card p{font-size:11px;color:var(--muted);margin:4px 0 0}.feature-note{margin-top:16px;color:#78859a;font-size:11px;line-height:1.7}.soft-section{background:#f0f4fb}.tool-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:17px}.tool-card{background:#fff;border:1px solid var(--line);border-radius:15px;padding:21px;box-shadow:0 7px 22px #1e376b08;min-width:0}.tool-icon{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;background:var(--blue2);color:var(--blue);font-size:19px;font-weight:800}.tool-card h3{margin:14px 0 4px;font-size:16px;letter-spacing:-.3px}.tool-card>p{color:var(--muted);font-size:12px;min-height:39px;margin:0 0 14px}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.form-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.tool-card label{display:block;color:#65728a;font-size:10px;font-weight:750;margin:7px 0}.tool-card input,.tool-card select,.tool-card textarea{display:block;width:100%;margin-top:5px;border:1px solid #e0e6f0;border-radius:7px;padding:9px 10px;background:#fbfcff;color:var(--ink);font:500 12px inherit;min-width:0}.tool-card textarea{resize:vertical;line-height:1.5}.tool-result{background:#f5f8fd;border-radius:8px;padding:12px;margin-top:12px;color:#344867;font-size:12px;overflow-wrap:anywhere;min-height:42px}.tool-result b{color:var(--blue)}.table-result table{border-collapse:collapse;width:100%;font-size:11px}.table-result td,.table-result th{padding:4px;border-bottom:1px solid var(--line);text-align:right}.article-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:17px}.article-card{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden}.article-art{height:115px;display:grid;place-items:center;font-size:43px;font-weight:800}.art-blue{background:linear-gradient(135deg,#e2ecff,#c9dcff);color:#2d63ce}.art-violet{background:linear-gradient(135deg,#eee8ff,#d9d1ff);color:#7055bd}.art-orange{background:linear-gradient(135deg,#fff0dd,#ffddb3);color:#b86b17}.art-green{background:linear-gradient(135deg,#dff8ed,#b8edd8);color:#16896a}.article-body{padding:17px}.article-tag{font-size:9px;color:var(--blue);font-weight:850;letter-spacing:1px}.article-body h3{font-size:15px;line-height:1.35;margin:8px 0}.article-body p{font-size:11px;color:var(--muted)}details summary{cursor:pointer;font-size:11px;color:var(--blue);font-weight:750}details p{line-height:1.7}.faq-section{background:#f1f5fb}.faq-list{max-width:850px}.faq-list details{background:#fff;border:1px solid var(--line);border-radius:10px;margin:9px 0;padding:15px 18px}.faq-list summary{color:var(--ink);font-size:13px}.faq-list p{font-size:12px;color:var(--muted);margin-bottom:0}.legal-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.legal-grid article{background:#fff;border:1px solid var(--line);border-radius:12px;padding:21px}.legal-grid h3{font-size:14px;margin:0 0 8px}.legal-grid p{color:var(--muted);font-size:12px;margin:0}footer{padding:35px max(7vw,28px);background:#111f3a;color:#d8e1f2;display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:8px}footer .brand{color:#fff}footer p{font-size:12px;color:#aab8d0}footer div{justify-self:end;display:flex;gap:20px;font-size:12px}footer small{grid-column:1/-1;color:#8e9db8;font-size:10px;border-top:1px solid #2b3953;padding-top:17px;margin-top:15px}body.dark{--bg:#0e1728;--surface:#142138;--ink:#edf3ff;--muted:#a5b2c8;--line:#2a3952;--blue2:#1e3154;background:var(--bg)}body.dark .topbar,body.dark .tool-card,body.dark .article-card,body.dark .faq-list details,body.dark .legal-grid article,body.dark .calc-panel,body.dark .history-panel{background:#142138}body.dark .hero,body.dark .soft-section,body.dark .faq-section{background:#101d32}body.dark .display,body.dark .tool-result,body.dark .keypad button,body.dark .memory-row button,body.dark .secondary,body.dark .theme-btn,body.dark .calc-toolbar select,body.dark .tool-card input,body.dark .tool-card select,body.dark .tool-card textarea{background:#1a2a43;color:var(--ink);border-color:var(--line)}body.dark .floating,body.dark .calc-preview{background:#172640;border-color:var(--line)}body.dark .mini-grid i,body.dark .tip-card{background:#20324e}body.dark .display input{color:var(--ink)}@media(max-width:1050px){.tool-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.article-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hero{padding-top:60px}.topbar nav{gap:14px}}@media(max-width:760px){.topbar{height:auto;min-height:68px;flex-wrap:wrap;padding:13px 20px}.topbar nav{order:3;width:100%;overflow:auto;padding:10px 0 3px;gap:19px;white-space:nowrap}.hero{grid-template-columns:1fr;padding:54px 23px 35px}.hero-art{height:320px}.hero h1{letter-spacing:-2px}.stats-strip{grid-template-columns:repeat(2,1fr);gap:17px;padding:22px}.stats-strip div{padding:0;border:0}.section{padding:58px 20px}.calculator-layout{grid-template-columns:1fr}.calc-panel,.history-panel{padding:13px}.keypad{gap:5px}.keypad button{min-height:40px;font-size:11px}.tool-grid{grid-template-columns:1fr}.article-grid{grid-template-columns:1fr 1fr}.section-heading{align-items:start;flex-direction:column}.legal-grid{grid-template-columns:1fr}footer{grid-template-columns:1fr}footer div{justify-self:start}footer small{grid-column:auto}}@media(max-width:420px){.article-grid{grid-template-columns:1fr}.keypad button{min-height:38px}.calc-toolbar{gap:8px}.calc-toolbar label{font-size:10px}.form-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.hero-art{transform:scale(.9);margin:-10px -20px}.trust-row{gap:9px}}

/* CalculatorMath360 update: stronger key typography and readable night-mode keypad. */
.keypad button {
  font-weight: 850;
  font-size: 13px;
  color: #263a5a;
  text-shadow: 0 0 0 currentColor;
}
.display input { font-weight: 750; }
#result { font-weight: 900; }
.keypad .equals { font-weight: 900; }
body.dark .keypad button,
body.dark .keypad button:nth-child(n) {
  background: #243754 !important;
  color: #f4f7ff !important;
  border-color: #405575 !important;
  font-weight: 850;
}
body.dark .keypad button:hover,
body.dark .keypad button:nth-child(n):hover {
  background: #304b72 !important;
  color: #ffffff !important;
  border-color: #7098e8 !important;
}
body.dark .keypad .equals,
body.dark .keypad .equals:hover {
  background: #2864e8 !important;
  color: #ffffff !important;
  border-color: #2864e8 !important;
}