:root{--pvh:36px;--bg:#FFF;--surface:#F5F5F7;--surface-hover:#EBEBED;--text:#000;--muted:#6E6E73;--line:rgba(0,0,0,.08);--focus:#000;--focus-soft:rgba(0,0,0,.1);--icon:rgba(0,0,0,.08);--blob:rgba(0,0,0,.12);--glass:rgba(255,255,255,.45);--glass-hover:rgba(255,255,255,.65);--glass-edge:rgba(0,0,0,.07);--glass-shine:rgba(255,255,255,.9);--shadow:0 8px 32px rgba(0,0,0,.08);--font-display:-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI",Roboto,system-ui,sans-serif;--font-body:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,system-ui,sans-serif}
@media(prefers-color-scheme:dark){:root{--bg:#000;--surface:#1C1C1E;--surface-hover:#2C2C2E;--text:#FFF;--muted:#8E8E93;--line:rgba(255,255,255,.1);--focus:#FFF;--focus-soft:rgba(255,255,255,.16);--icon:rgba(255,255,255,.1);--blob:rgba(255,255,255,.14);--glass:rgba(255,255,255,.07);--glass-hover:rgba(255,255,255,.12);--glass-edge:rgba(255,255,255,.12);--glass-shine:rgba(255,255,255,.22);--shadow:0 8px 32px rgba(0,0,0,.5)}}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;min-height:100svh;background:var(--bg);color:var(--text);font-family:var(--font-body);line-height:1.6;padding:env(safe-area-inset-top,0px) env(safe-area-inset-right,0px) env(safe-area-inset-bottom,0px) env(safe-area-inset-left,0px)}
body::before{content:"";position:fixed;inset:0;z-index:-1;background:radial-gradient(circle at 18% 22%,var(--blob) 0,transparent 38%),radial-gradient(circle at 82% 34%,var(--blob) 0,transparent 34%),radial-gradient(circle at 50% 88%,var(--blob) 0,transparent 40%)}
a{color:inherit}
.sr{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;inset-inline-start:8px;top:-60px;z-index:9;background:var(--text);color:var(--bg);padding:8px 14px;border-radius:999px}
.skip:focus{top:8px}
.logo{position:absolute;top:calc(env(safe-area-inset-top,0px) + var(--pvh) + 20px);inset-inline-start:calc(env(safe-area-inset-left,0px) + 24px);z-index:2;display:block;color:var(--text)}
.logo svg{display:block;width:118px;height:auto}
.top-r{position:absolute;top:calc(env(safe-area-inset-top,0px) + var(--pvh) + 18px);inset-inline-end:calc(env(safe-area-inset-right,0px) + 20px);z-index:4;display:flex;gap:8px;align-items:center}
.pill,.lang summary{display:inline-flex;align-items:center;gap:6px;height:36px;padding:0 14px;border-radius:999px;font-size:.85rem;text-decoration:none;cursor:pointer;list-style:none;background:var(--glass);border:1px solid var(--glass-edge);-webkit-backdrop-filter:blur(24px) saturate(180%);backdrop-filter:blur(24px) saturate(180%)}
.lang{position:relative}.lang summary::-webkit-details-marker{display:none}
.lang ul{position:absolute;inset-inline-end:0;top:44px;margin:0;padding:8px;list-style:none;min-width:200px;background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);display:grid;grid-template-columns:1fr 1fr;gap:2px;max-height:70svh;overflow:auto}
.lang li a{display:block;padding:7px 10px;border-radius:10px;text-decoration:none;font-size:.88rem}
.lang li a:hover,.lang li a[aria-current]{background:var(--surface-hover)}
a:focus-visible,summary:focus-visible,button:focus-visible,select:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--focus);outline-offset:3px}
.hero{display:flex;flex-direction:column;align-items:center;padding:max(96px,17svh) 20px 0}
.greeting{display:grid;margin:0 0 24px;width:100%;font-family:var(--font-display);font-weight:500;font-size:clamp(1.9rem,5.5vw,3.1rem);line-height:1.15;text-align:center;letter-spacing:-.01em}
.greeting span{grid-area:1/1;opacity:0;transform:translateY(8px);filter:blur(6px);transition:opacity 1.1s ease,transform 1.1s ease,filter 1.1s ease;pointer-events:none}
.greeting span.is-active{opacity:1;transform:none;filter:none}
.search{position:relative;width:min(680px,100%)}
.search svg{position:absolute;inset-inline-start:20px;top:30px;width:20px;height:20px;transform:translateY(-50%);color:var(--muted);z-index:1;pointer-events:none}
.search input{width:100%;height:60px;padding:0 22px 0 52px;padding-inline:52px 22px;border-radius:999px;color:var(--text);font:inherit;font-size:1.05rem;-webkit-appearance:none;appearance:none;transition:box-shadow .2s,border-color .2s,background .2s}
.search input::placeholder{color:var(--muted);opacity:1}
.search input:focus{outline:none;border-color:var(--focus);box-shadow:0 0 0 4px var(--focus-soft),inset 0 1px 0 var(--glass-shine),var(--shadow)}
.search input::-webkit-search-cancel-button{-webkit-appearance:none}
.search input,.card,.tool,.drop{background:var(--glass);-webkit-backdrop-filter:blur(24px) saturate(180%);backdrop-filter:blur(24px) saturate(180%);border:1px solid var(--glass-edge);box-shadow:inset 0 1px 0 var(--glass-shine),inset 0 -1px 0 var(--glass-edge),var(--shadow)}
.sugg{position:absolute;inset-inline:0;top:66px;margin:0;padding:8px;list-style:none;background:var(--surface);border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);z-index:5;max-height:60svh;overflow:auto}
.sugg a{display:block;padding:10px 14px;border-radius:14px;text-decoration:none}
.sugg a:hover,.sugg a:focus{background:var(--surface-hover)}
.sugg[hidden]{display:none}
.tools{width:min(1280px,100%);margin:56px auto 0;padding:0 20px 24px}
.tools h2,.wrap h2{margin:0 0 16px 4px;font-family:var(--font-display);font-weight:500;font-size:1.1rem;color:var(--muted)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,172px),1fr));gap:16px}
.card{display:flex;flex-direction:column;gap:18px;padding:22px;border-radius:24px;color:inherit;text-decoration:none;transition:background .2s,transform .2s}
.card:hover{background:var(--glass-hover);transform:translateY(-2px)}
.icon{width:44px;height:44px;border-radius:12px;background:var(--icon);display:grid;place-items:center}
.icon svg{width:22px;height:22px}
.card strong{font-size:.98rem;font-weight:600;line-height:1.3}
.card span{display:block;margin-top:3px;font-size:.84rem;color:var(--muted)}
@media(min-width:900px){.grid{grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:22px}.card{padding:28px;gap:28px;border-radius:28px;min-height:190px}.icon{width:56px;height:56px;border-radius:15px}.icon svg{width:26px;height:26px}.card strong{font-size:1.08rem}.card span{font-size:.92rem;margin-top:4px}.tools{margin-top:72px}}
@media(min-width:1500px){.tools{width:min(1440px,100%)}.grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}}
.wrap{width:min(960px,100%);margin:0 auto;padding:88px 20px 40px}
.wrap.wide{width:min(1280px,100%)}
h1{font-family:var(--font-display);font-weight:600;font-size:clamp(1.7rem,4.5vw,2.6rem);letter-spacing:-.015em;line-height:1.15;margin:.35em 0 .3em}
.wrap h2{color:var(--text);font-weight:600;font-size:1.25rem;margin:2em 0 .6em}
.lead{color:var(--muted);margin:0 0 20px}
.crumbs ol{display:flex;flex-wrap:wrap;gap:4px 8px;list-style:none;margin:0;padding:0;font-size:.85rem;color:var(--muted)}
.crumbs li+li::before{content:"/";margin-inline-end:8px}
.crumbs a{text-decoration:none}.crumbs a:hover{text-decoration:underline}
.tool{padding:20px;border-radius:28px;margin:8px 0 8px}
.drop{position:relative;display:flex;flex-direction:column;gap:8px;align-items:center;justify-content:center;min-height:170px;text-align:center;border:2px dashed var(--line);border-radius:22px;color:var(--muted);cursor:pointer;padding:20px;box-shadow:none}
.drop:hover,.drop.over{border-color:var(--focus);background:var(--glass-hover)}
.drop:focus-within{outline:2px solid var(--focus);outline-offset:3px}
.drop input{position:absolute;width:1px;height:1px;opacity:0}
.drop svg{width:34px;height:34px}
.fields{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));margin:16px 0}
.full{grid-column:1/-1}
.f span{display:block;font-size:.85rem;color:var(--muted);margin-bottom:4px}
.f.ck{display:flex;align-items:center;gap:8px}.f.ck span{margin:0;color:var(--text)}.f.ck input{width:auto}
input,select,textarea{font:inherit;color:var(--text);background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:10px 12px;width:100%}
textarea{min-height:150px;resize:vertical}
.out{margin-top:14px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:9px 18px;border-radius:999px;background:var(--text);color:var(--bg);border:0;font:inherit;font-size:.9rem;cursor:pointer;text-decoration:none}
.btn.ghost{background:transparent;color:var(--text);border:1px solid var(--line)}
.row{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.q{list-style:none;margin:16px 0 0;padding:0;display:grid;gap:8px}
.q li{display:flex;gap:10px;align-items:center;justify-content:space-between;padding:10px 14px;background:var(--surface);border-radius:14px;flex-wrap:wrap}
.q .n{overflow-wrap:anywhere;flex:1 1 180px}.q .s{color:var(--muted);font-size:.85rem}
.q.bad .s,.err{color:#d70015}
.res{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin:0}
.res div{background:var(--surface);padding:12px 14px;border-radius:14px}
.res dt{font-size:.8rem;color:var(--muted)}.res dd{margin:0;font-size:1.25rem;font-weight:600;overflow-wrap:anywhere}
.big{font-size:clamp(1.6rem,5vw,2.4rem);font-weight:600;font-family:var(--font-display);margin:10px 0 0;overflow-wrap:anywhere}
.uw{display:grid;grid-template-columns:1fr;gap:12px}
@media(min-width:700px){.uw{grid-template-columns:1.2fr 1fr auto 1fr;align-items:end}}
.diff ins{background:rgba(52,199,89,.28);text-decoration:none}.diff del{background:rgba(255,59,48,.28)}
.diff div{white-space:pre-wrap;font-family:ui-monospace,Menlo,monospace;font-size:.85rem;padding:0 6px}
.scroll{overflow-x:auto}
table.t{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums}
.t th,.t td{padding:8px 12px;text-align:start;border-bottom:1px solid var(--line)}
.t th{color:var(--muted);font-weight:500;font-size:.85rem}
.prose{max-width:72ch}.prose p{margin:.6em 0}.prose ol{padding-inline-start:1.3em}
.note{padding:12px 16px;border-radius:14px;background:var(--surface);margin:14px 0;font-size:.95rem}
.formula{font-family:ui-monospace,Menlo,monospace;background:var(--surface);padding:10px 14px;border-radius:14px;display:inline-block;direction:ltr}
.faq{border-bottom:1px solid var(--line);padding:12px 0}.faq summary{cursor:pointer;font-weight:600}.faq p{margin:.5em 0 0;color:var(--muted)}
.chips{display:flex;flex-wrap:wrap;gap:8px;padding:0;margin:0;list-style:none}
.chips a{display:inline-block;padding:8px 14px;border-radius:999px;background:var(--surface);text-decoration:none;font-size:.9rem}
.chips a:hover{background:var(--surface-hover)}
.list{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:4px 16px;list-style:none;margin:0;padding:0}
.list a{display:block;padding:7px 4px;text-decoration:none;border-bottom:1px solid var(--line)}.list a:hover{text-decoration:underline}
footer{border-top:1px solid var(--line);margin-top:48px;padding:28px 20px 44px;color:var(--muted);font-size:.9rem;display:flex;gap:10px 24px;flex-wrap:wrap;justify-content:center}
footer a{text-decoration:none}footer a:hover{text-decoration:underline}
.intro{width:min(780px,100%);margin:0 auto;padding:8px 20px;color:var(--muted)}
[dir=rtl] .formula,[dir=rtl] .t td.num{direction:ltr;text-align:end}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}

/* privacy marquee */
.pv{position:relative;z-index:5;height:var(--pvh);overflow:hidden;display:flex;align-items:center;background:#0a7a4b;color:#fff;font-size:.82rem;font-weight:600;letter-spacing:.01em;white-space:nowrap}
.pv-t{display:flex;flex:none;min-width:100%;justify-content:center}.pv.js .pv-t{min-width:max-content;justify-content:flex-start;animation:pvm 45s linear infinite}
.pv.js:hover .pv-t,.pv.js:focus-within .pv-t{animation-play-state:paused}
.pv-i{display:inline-flex;align-items:center;gap:8px;padding:0 28px}
.pv-i::before{content:"";width:14px;height:14px;flex:none;background:currentColor;-webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='5' y='11' width='14' height='10' rx='2'/%3E%3Cpath d='M8 11V8a4 4 0 0 1 8 0v3'/%3E%3C/svg%3E") center/contain no-repeat;mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='5' y='11' width='14' height='10' rx='2'/%3E%3Cpath d='M8 11V8a4 4 0 0 1 8 0v3'/%3E%3C/svg%3E") center/contain no-repeat}
.pv-i::after{content:"";width:5px;height:5px;border-radius:50%;background:rgba(255,255,255,.55);margin-inline-start:28px}
@keyframes pvm{to{transform:translateX(-50%)}}
[dir=rtl] .pv.js .pv-t{animation-name:pvr}
@keyframes pvr{to{transform:translateX(50%)}}
.pv a{color:inherit;text-decoration:underline;text-underline-offset:3px}
@media(prefers-reduced-motion:reduce){.pv{height:auto;min-height:var(--pvh);white-space:normal;justify-content:center;padding:6px 12px;text-align:center}.pv-t{animation:none;min-width:0;flex-wrap:wrap;justify-content:center}.pv-t .pv-i:nth-child(n+3),.pv-t [aria-hidden]{display:none}.pv.js .pv-t{animation:none}.pv-i::after{display:none}.pv-i{padding:0 8px}}
/* colourful tool icons */
.icon{background:color-mix(in srgb,var(--ic,#888) 16%,transparent);color:var(--ic,var(--text))}
.icon svg{stroke:currentColor}
.card:hover .icon{background:color-mix(in srgb,var(--ic,#888) 26%,transparent)}
@media(prefers-color-scheme:dark){.icon{background:color-mix(in srgb,var(--ic,#888) 24%,transparent)}.card:hover .icon{background:color-mix(in srgb,var(--ic,#888) 34%,transparent)}}
/* tool extras */
progress{width:100%;height:8px;border-radius:99px;accent-color:#0a7a4b;flex:1 1 100%}
.tu{flex:1 1 100%;margin-top:8px}
.tu-cv{width:100%;max-height:60vh;object-fit:contain;touch-action:none;cursor:crosshair;border-radius:14px;background:conic-gradient(#bbb 25%,#eee 0 50%,#bbb 0 75%,#eee 0) 0 0/16px 16px}
.tu .f{flex:1 1 160px}
.pre{white-space:pre-wrap;word-break:break-all;font-family:ui-monospace,Menlo,monospace;font-size:.85rem;background:var(--surface);padding:10px 14px;border-radius:14px;user-select:all}
.kv{display:grid;gap:6px;margin:12px 0}
.tw{border-collapse:collapse;width:100%}.tw th,.tw td{padding:8px 12px;text-align:start;border-bottom:1px solid var(--line)}
.c0{--ic:#ef4444}.c1{--ic:#3b82f6}.c2{--ic:#22c55e}.c3{--ic:#f97316}.c4{--ic:#a855f7}.c5{--ic:#14b8a6}.c6{--ic:#ec4899}.c7{--ic:#f59e0b}.c8{--ic:#6366f1}.c9{--ic:#10b981}.c10{--ic:#d946ef}.c11{--ic:#0ea5e9}.c12{--ic:#84cc16}.c13{--ic:#f43f5e}.c14{--ic:#8b5cf6}.c15{--ic:#06b6d4}.c16{--ic:#e11d48}.c17{--ic:#2563eb}.c18{--ic:#16a34a}.c19{--ic:#ea580c}.c20{--ic:#9333ea}.c21{--ic:#0d9488}.c22{--ic:#db2777}.c23{--ic:#ca8a04}
.qa dt{font-weight:600;margin-top:12px}.qa dd{margin:2px 0 0;color:var(--muted)}
.privlink{margin:10px 4px 0;font-size:.85rem;color:var(--muted)}.privlink a{color:inherit}
.tools.recent{margin-top:32px}.tools.recent h2 small{margin-inline-start:10px;font-size:.78rem;font-weight:400;opacity:.85}
.chips button{font:inherit;font-size:.9rem;padding:8px 14px;border-radius:999px;background:transparent;border:1px dashed var(--line);color:var(--muted);cursor:pointer}.chips button:hover{color:var(--text)}
.pin{position:fixed;z-index:50;inset-inline:12px;bottom:calc(env(safe-area-inset-bottom,0px) + 12px);margin-inline:auto;max-width:440px;display:grid;grid-template-columns:auto 1fr;gap:6px 12px;align-items:center;padding:14px;border-radius:22px;background:var(--bg);color:var(--text);border:1px solid var(--line);box-shadow:0 12px 40px rgba(0,0,0,.22);animation:pinup .35s ease both}
.pin img{width:44px;height:44px;border-radius:11px}.pin-b{display:flex;flex-direction:column;gap:2px;min-width:0}.pin-b strong{font-size:.95rem}.pin-b span{font-size:.85rem;color:var(--muted)}
.pin-a{grid-column:1/-1;display:flex;gap:8px;justify-content:flex-end}
@keyframes pinup{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
@media(prefers-reduced-motion:reduce){.pin{animation:none}}