:root{--ink:#17202A;--ink-2:#4A5563;--ink-3:#8A94A3;--paper:#fff;--mist:#EAF3F6;--line:#DCE6EA;--teal:#0F6E8C;--teal-deep:#0A4F66;--teal-soft:#D5E9F0;--amber:#F2B94C;--r-sm:8px;--r-md:14px;--r-lg:22px}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Manrope',system-ui,sans-serif;color:var(--ink);background:var(--paper);line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button,input,textarea{font-family:inherit;font-size:inherit}
.wrap{width:min(1180px,calc(100% - 48px));margin:0 auto}
:focus-visible{outline:3px solid var(--amber);outline-offset:3px;border-radius:6px}
.nav{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center}.logo img{height:32px;width:auto}
.logo-mark{width:34px;height:34px;border-radius:10px;background:var(--teal);position:relative;overflow:hidden}
.logo-mark::before{content:"";position:absolute;left:8px;top:8px;width:18px;height:3px;background:#fff;border-radius:2px;box-shadow:0 6px 0 #fff,0 12px 0 rgba(255,255,255,.55)}
.nav-links{display:flex;gap:28px;font-weight:600;color:var(--ink-2)}
.nav-links a:hover,.nav-links a.on{color:var(--teal)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;padding:12px 22px;border-radius:999px;border:1.5px solid transparent;cursor:pointer;font-size:.98rem;transition:.15s;background:none}
.btn-primary{background:var(--teal);color:#fff}.btn-primary:hover{background:var(--teal-deep)}
.btn-ghost{color:var(--teal);border-color:var(--teal-soft)}.btn-ghost:hover{border-color:var(--teal)}
.btn-lg{padding:16px 30px;font-size:1.05rem}
footer{border-top:1px solid var(--line);padding:48px 0 32px;color:var(--ink-2);font-size:.93rem;margin-top:60px}
footer .wrap{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
footer h4{color:var(--ink);font-weight:700;margin-bottom:12px;font-size:.95rem}
footer ul{list-style:none;display:grid;gap:8px}
footer a:hover{color:var(--teal)}
.copy{margin-top:36px;padding-top:20px;border-top:1px solid var(--line);color:var(--ink-3);font-size:.85rem;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.page-head{background:linear-gradient(180deg,var(--mist) 0%,#fff 100%);padding:56px 0 36px}
.page-head h1{font-size:clamp(2rem,4vw,2.8rem);letter-spacing:-.03em;line-height:1.1;font-weight:800;max-width:20ch}
.page-head p{color:var(--ink-2);margin-top:12px;max-width:56ch;font-size:1.05rem}
.prose{max-width:72ch;font-size:1.05rem;padding:40px 0}
.prose h2{font-size:1.5rem;letter-spacing:-.02em;margin:36px 0 12px;font-weight:800}
.prose h3{font-size:1.15rem;margin:26px 0 8px;font-weight:700}
.prose p{margin:0 0 16px;color:var(--ink-2)}
.prose ul,.prose ol{margin:0 0 16px 22px;color:var(--ink-2)}
.prose li{margin-bottom:6px}
.prose em{color:var(--ink-3)}
.prose img{max-width:100%;border-radius:var(--r-md);margin:10px 0 20px}
.prose a{color:var(--teal);text-decoration:underline}
.prose blockquote{border-left:3px solid var(--teal);padding-left:16px;color:var(--ink-2);margin:0 0 16px}
.ad{margin:64px 0;min-height:90px;display:flex;align-items:center;justify-content:center;color:var(--ink-3);font-size:.8rem;border:1px dashed var(--line);border-radius:var(--r-sm)}
.empty{color:var(--ink-3);padding:60px 0;text-align:center}
@media (max-width:640px){.nav-links{display:none}footer .wrap{grid-template-columns:1fr}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* ---- shared tool page shell ---- */
.tool-wrap{width:min(1100px,calc(100% - 40px));margin:0 auto;padding:28px 0 20px}
.tool-head{padding:38px 0 10px}
.tool-head h1{font-size:clamp(1.7rem,3.4vw,2.4rem);letter-spacing:-.03em;font-weight:800;line-height:1.1;max-width:22ch}
.tool-head p{color:var(--ink-2);margin-top:10px;max-width:60ch}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:start}
.box{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px}
.box h2{font-size:1rem;font-weight:800;margin-bottom:4px}
.box .sub{color:var(--ink-2);font-size:.9rem;margin-bottom:14px}
.f{display:grid;gap:12px}
.f label{display:grid;gap:5px;font-size:.82rem;font-weight:600;color:var(--ink-2)}
.f input,.f textarea,.f select{width:100%;padding:11px 12px;border:1.5px solid var(--line);border-radius:10px;background:#fff;font-family:inherit;font-size:1rem;color:var(--ink)}
.f input:focus,.f textarea:focus,.f select:focus{border-color:var(--teal);outline:none}
.f textarea{min-height:120px;resize:vertical;line-height:1.55}
.f .row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.note{background:var(--mist);border-radius:10px;padding:12px 14px;font-size:.85rem;color:var(--ink-2);line-height:1.55}
.note b{color:var(--ink)}
.warnbox{background:#FFF4D6;color:#8A5A00;border-radius:10px;padding:12px 14px;font-size:.85rem;line-height:1.55}
.hint{font-size:.78rem;color:var(--ink-3);font-weight:500}
.out{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;white-space:pre-wrap;line-height:1.7;min-height:80px}
.pillrow{display:flex;gap:8px;flex-wrap:wrap}
.pill{font-size:.82rem;font-weight:700;padding:5px 11px;border-radius:999px;background:var(--mist);color:var(--teal-deep)}
.pill.bad{background:#FDECEA;color:#A03127}
.pill.good{background:#E3F6EC;color:#1D7A52}
.score{display:flex;align-items:center;gap:16px}
.ring{width:96px;height:96px;flex:none}
.chk{display:grid;gap:10px;margin-top:6px}
.chk .it{display:flex;gap:12px;align-items:flex-start;padding:12px 14px;border:1px solid var(--line);border-radius:12px}
.chk .it .ic{width:22px;height:22px;border-radius:50%;flex:none;display:grid;place-items:center;font-size:.72rem;font-weight:800;color:#fff;margin-top:1px}
.chk .ok .ic{background:#2FB37A}.chk .warn .ic{background:#F2B94C;color:#5A4200}.chk .bad .ic{background:#C0392B}
.chk b{display:block;font-size:.95rem}
.chk p{color:var(--ink-2);font-size:.88rem;margin-top:2px}
.copybar{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
@media (max-width:860px){.grid2{grid-template-columns:1fr}.f .row{grid-template-columns:1fr}}

/* ---- tabbed tool pages ---- */
.tabbar{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 20px}
.tabbar button{border:1.5px solid var(--line);background:#fff;border-radius:999px;padding:9px 16px;font-weight:700;font-size:.88rem;color:var(--ink-2);cursor:pointer;font-family:inherit}
.tabbar button.on{background:var(--teal);border-color:var(--teal);color:#fff}
.tabpane{display:none}.tabpane.on{display:block}
.mini{font-size:.82rem;font-weight:700;padding:7px 12px;border-radius:999px;border:1.5px solid var(--line);background:#fff;color:var(--ink-2);cursor:pointer;font-family:inherit}
.mini:hover{border-color:var(--teal);color:var(--teal)}
.mini.on{background:#E3F6EC;border-color:#2FB37A;color:#1D7A52}
.rowlist{display:grid;gap:10px}
.card2{border:1.5px solid var(--line);border-radius:12px;padding:14px;background:#fff;display:grid;gap:10px;position:relative}
.card2 .rm{position:absolute;top:8px;right:8px;background:none;border:0;color:var(--ink-3);cursor:pointer;font-size:1rem}
.card2 .rm:hover{color:#C0392B}
.flag{font-size:.76rem;font-weight:700;padding:3px 9px;border-radius:999px}
.flag.no{background:#FDECEA;color:#A03127}.flag.yes{background:#E3F6EC;color:#1D7A52}