:root{--ink:#163b35;--green:#147763;--mint:#eaf7f1;--paper:#f7faf8;--muted:#60736e;--line:#dce9e3;--white:#fff;--shadow:0 12px 35px rgba(22,59,53,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:#20332f;font:16px/1.6 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:var(--green);text-decoration:none}a:hover{text-decoration:underline}.wrap{width:min(1120px,92%);margin:auto}.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:74px}.brand{font-size:1.45rem;font-weight:850;letter-spacing:-.04em;color:var(--ink)}.brand span{color:var(--green)}.navlinks{display:flex;align-items:center;gap:20px;flex-wrap:wrap}.navlinks a{color:#35534b;font-weight:650;font-size:.95rem}.navlinks a.active{color:var(--green)}.hero{padding:64px 0 44px;background:radial-gradient(circle at 85% 15%,#d6f0e4 0,transparent 30%),linear-gradient(135deg,#f4fbf7,#eaf7f1)}.hero-grid{display:grid;grid-template-columns:1.2fr .8fr;align-items:center;gap:38px}.eyebrow{color:var(--green);font-weight:800;text-transform:uppercase;letter-spacing:.12em;font-size:.78rem}.hero h1{font-size:clamp(2.2rem,5vw,4rem);line-height:1.08;letter-spacing:-.055em;color:var(--ink);margin:12px 0 18px}.hero p{max-width:650px;color:#536c64;font-size:1.08rem}.hero-art{min-height:230px;border:1px solid #cce5d9;border-radius:28px;background:rgba(255,255,255,.75);box-shadow:var(--shadow);padding:26px;display:grid;place-items:center}.hero-art-inner{width:100%;max-width:300px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;transform:rotate(2deg)}.searchbar{display:flex;gap:10px;max-width:620px;margin-top:24px}.searchbar input{flex:1;min-width:0}.field,input,select,textarea{font:inherit}.field,input,select{width:100%;padding:12px 13px;border:1px solid #cadbd3;border-radius:10px;background:#fff;color:#213c34;outline:none}.field:focus,input:focus,select:focus{border-color:var(--green);box-shadow:0 0 0 3px #1477631a}.btn{display:inline-flex;justify-content:center;align-items:center;border:0;border-radius:10px;background:var(--green);color:#fff;padding:12px 18px;font-weight:750;cursor:pointer;font:inherit;font-weight:750}.btn:hover{background:#105e4e;text-decoration:none}.btn.secondary{background:#e3f2eb;color:var(--ink)}.section{padding:48px 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:22px}.section h2{color:var(--ink);font-size:clamp(1.6rem,3vw,2.2rem);line-height:1.2;margin:0 0 8px;letter-spacing:-.035em}.muted{color:var(--muted)}.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.tool-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:0 5px 20px rgba(22,59,53,.035);transition:transform .18s,box-shadow .18s}.tool-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);text-decoration:none}.tool-icon{width:46px;height:46px;border-radius:13px;display:grid;place-items:center;background:var(--mint);font-size:1.4rem;margin-bottom:14px}.tool-card h3{margin:0 0 7px;color:var(--ink);font-size:1.12rem}.tool-card p{margin:0;color:var(--muted);font-size:.94rem}.feature-row{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.feature{background:#fff;border:1px solid var(--line);padding:18px;border-radius:14px}.feature strong{display:block;color:var(--ink)}.tool-hero{padding:38px 0 18px}.crumb{font-size:.9rem;color:var(--muted)}.tool-hero h1{color:var(--ink);font-size:clamp(2rem,4vw,3rem);line-height:1.15;letter-spacing:-.045em;margin:12px 0}.tool-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:22px;align-items:start;padding-bottom:60px}.panel{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:0 5px 20px rgba(22,59,53,.035)}.panel h2,.panel h3{color:var(--ink);margin-top:0}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.form-group label{display:block;font-weight:700;font-size:.92rem;margin-bottom:7px;color:#29483f}.form-group.full{grid-column:1/-1}.result{margin-top:18px;padding:18px;background:var(--mint);border:1px solid #cce7d9;border-radius:12px;display:none}.result.show{display:block}.result strong{font-size:1.35rem;color:var(--ink);display:block}.result small{color:var(--muted)}.side-links{display:grid;gap:10px}.side-links a{padding:10px 12px;border:1px solid var(--line);border-radius:10px;color:var(--ink);font-weight:650}.side-links a:hover{background:var(--mint);text-decoration:none}.note{background:#fff9e8;border:1px solid #f0dfad;border-radius:12px;padding:14px;color:#6b5a2e;font-size:.9rem;margin-top:18px}.content-copy{max-width:800px;color:#53665f}.site-footer{background:#153e35;color:#e8f4ef;padding:34px 0}.site-footer a{color:#e8f4ef}.site-footer p{margin:4px 0;color:#c1d8ce;font-size:.92rem}.empty{padding:24px;color:var(--muted);text-align:center;display:none}
@media(max-width:820px){.hero-grid{grid-template-columns:1fr}.hero-art{display:none}.tool-grid{grid-template-columns:repeat(2,1fr)}.tool-layout{grid-template-columns:1fr}.feature-row{grid-template-columns:repeat(2,1fr)}.nav{align-items:flex-start;padding:16px 0;flex-direction:column;gap:10px}.navlinks{gap:14px}}
@media(max-width:520px){.tool-grid,.form-grid{grid-template-columns:1fr}.form-group.full{grid-column:auto}.hero{padding:42px 0 32px}.searchbar{flex-direction:column}.section{padding:34px 0}.panel{padding:18px}.tool-card{padding:18px}.navlinks{gap:11px}.navlinks a{font-size:.9rem}}

.lead{font-size:1.08rem;max-width:760px}.stack>*+*{margin-top:22px}.tool-layout aside{position:sticky;top:92px}.tool-layout aside .ad-slot.on{margin-top:18px}
.article h2,.faq h2{font-size:1.35rem;margin:26px 0 10px;color:var(--ink)}.article h2:first-child,.faq h2{margin-top:0}.article p,.article li{color:#42574f}.steps{padding-left:22px;margin:0}.steps li{margin:6px 0}
.faq details{border:1px solid var(--line);border-radius:12px;padding:12px 16px;background:#fff;margin-bottom:10px}.faq summary{cursor:pointer;font-weight:700;color:var(--ink)}.faq details p{margin:10px 0 2px;color:#42574f}
.cat-block{margin-bottom:34px;scroll-margin-top:90px}.cat-head h2{margin:0 0 2px;font-size:1.45rem}.cat-head p{margin:0 0 14px}
.pop{display:block;padding:11px 14px;margin-top:10px;border:1px solid var(--line);border-radius:11px;font-weight:700;color:var(--ink);background:#fff}.pop:hover{background:var(--mint);text-decoration:none}
.footer-grid{display:grid;grid-template-columns:1.3fr repeat(4,1fr);gap:24px}.footer-grid h4{margin:0 0 8px;color:#fff;font-size:.95rem}.footer-grid a{display:block;margin:5px 0;font-size:.9rem}.site-footer .legal{margin-top:24px;border-top:1px solid #2c5a4e;padding-top:16px}
.content-copy h2{color:var(--ink);font-size:1.25rem;margin:22px 0 6px}.content-copy{padding-bottom:40px}
textarea{width:100%;padding:12px 13px;border:1px solid #cadbd3;border-radius:10px;background:#fff;color:#213c34;outline:none;resize:vertical}textarea:focus{border-color:var(--green);box-shadow:0 0 0 3px #1477631a}.draw-list{margin:10px 0 0;padding-left:24px}.draw-list li{margin:4px 0}.draw-list small{color:var(--muted)}
.wheel-wrap{max-width:540px;margin:18px auto 0}.wheel-wrap canvas{width:100%;height:auto;display:block;cursor:pointer}.wheel-actions{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-top:14px}.wheel-actions .btn:first-child{padding:14px 34px;font-size:1.1rem}.btn:disabled{opacity:.6;cursor:not-allowed}.winner-line{display:block;font-size:1.6rem;color:var(--ink)}
.ad-slot{display:none}.ad-slot.on{display:block;min-height:100px;text-align:center;overflow:hidden}
@media(max-width:820px){.footer-grid{grid-template-columns:1fr 1fr}.tool-layout aside{position:static}}
@media(max-width:520px){.footer-grid{grid-template-columns:1fr}}

/* accessibility */
.skip{position:absolute;left:-9999px;top:8px;background:var(--ink);color:#fff;padding:10px 16px;border-radius:8px;z-index:100;font-weight:700}.skip:focus{left:8px;text-decoration:none}
a:focus-visible,.btn:focus-visible,summary:focus-visible{outline:3px solid #1477634d;outline-offset:2px;border-radius:6px}
.navlinks a[aria-current=page]{color:var(--green);border-bottom:2px solid var(--green)}
.form-group input[type=checkbox]{width:auto}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.tool-card{transition:none}.tool-card:hover{transform:none}}
/* compact mobile header: not sticky, links scroll sideways instead of stacking */
@media(max-width:820px){.site-header{position:static}.nav{min-height:0;padding:12px 0;gap:6px}.navlinks{flex-wrap:nowrap;overflow-x:auto;width:100%;gap:16px;padding-bottom:4px;-webkit-overflow-scrolling:touch}.navlinks a{white-space:nowrap}}
@media print{.site-header,.site-footer,aside,.ad-slot,.searchbar{display:none}.tool-layout{grid-template-columns:1fr}}

/* basic calculator */
.calc{max-width:360px;margin:0 auto}.calc-screen{background:#153e35;color:#fff;border-radius:14px;padding:14px 18px;text-align:right;min-height:104px;display:flex;flex-direction:column;justify-content:flex-end;overflow:hidden}
.calc-expr{min-height:1.4em;color:#9cc7b9;font-size:.95rem;overflow-x:auto;white-space:nowrap}.calc-display{font-size:2.3rem;font-weight:700;line-height:1.2;overflow-x:auto;white-space:nowrap;font-variant-numeric:tabular-nums}
.calc-keys{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:14px}.ck{font:inherit;font-size:1.3rem;font-weight:700;padding:16px 0;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--ink);cursor:pointer;touch-action:manipulation}
.ck:hover{background:var(--mint)}.ck:active{transform:scale(.97)}.ck.fn{background:#e3f2eb}.ck.op{background:#d9efe5;color:var(--green)}.ck.eq{background:var(--green);color:#fff;border-color:var(--green)}.ck.eq:hover{background:#105e4e}
.ck:focus-visible{outline:3px solid #1477634d;outline-offset:2px}.calc-hist{margin-top:16px;font-size:.92rem;color:var(--muted)}.calc-hist ol{margin:6px 0 0;padding-left:20px}