:root{
  --bg:#f6f7fb;--surface:#ffffff;--surface-2:#eef0f7;--text:#151a2e;--muted:#5a6072;
  --border:#e3e6f0;--brand:#4f46e5;--brand-2:#7c3aed;--brand-3:#0ea5e9;
  --accent:#10b981;--warn:#f59e0b;--danger:#ef4444;
  --shadow:0 1px 2px rgba(16,24,40,.05),0 8px 24px -12px rgba(16,24,40,.18);
  --radius:16px;
}
html.dark{
  --bg:#0b0d16; --surface:#141827; --surface-2:#1b2136; --text:#eef1fb; --muted:#9aa3bd;
  --border:#262d47; --shadow:0 1px 2px rgba(0,0,0,.4),0 10px 30px -12px rgba(0,0,0,.6);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);
  font-family:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  line-height:1.6;-webkit-font-smoothing:antialiased;min-height:100vh}
h1,h2,h3,h4{line-height:1.2;margin:0 0 .5rem;letter-spacing:-.02em}
h1{font-size:clamp(1.7rem,4.5vw,2.6rem);font-weight:800}
h2{font-size:clamp(1.25rem,3vw,1.6rem);font-weight:700}
h3{font-size:1.05rem;font-weight:700}
p{margin:0 0 .9rem}
a{color:var(--brand);text-decoration:none}
img{max-width:100%}
.container{max-width:1120px;margin:0 auto;padding:0 20px}
.sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- header ---------- */
header{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 82%,transparent);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;gap:18px;height:62px}
.logo{font-weight:800;font-size:1.15rem;display:flex;align-items:center;gap:9px;color:var(--text)}
.logo-mark{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;color:#fff;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));font-weight:900;flex:none}
.nav-search{flex:1;max-width:440px;position:relative}
.nav-search input{width:100%;padding:10px 14px 10px 38px;border-radius:12px;border:1px solid var(--border);
  background:var(--surface);color:var(--text);font-size:.92rem;outline:none}
.nav-search input:focus{border-color:var(--brand);box-shadow:0 0 0 3px color-mix(in srgb,var(--brand) 18%,transparent)}
.nav-search .srch-ic{position:absolute;left:13px;top:50%;translate:0 -50%;width:18px;height:18px;stroke:var(--muted);pointer-events:none}
.nav-search svg{position:absolute;left:12px;top:50%;translate:0 -50%;opacity:.5;pointer-events:none}
.nav-links{display:flex;align-items:center;gap:16px;margin-left:auto}
.nav-links a{color:var(--muted);font-size:.92rem;font-weight:600}
.nav-links a:hover{color:var(--text)}
.ghost-btn{background:transparent;border:1px solid var(--border);color:var(--text);padding:8px 14px;border-radius:11px;font-weight:600;cursor:pointer;font-size:.9rem}
.ghost-btn:hover{border-color:var(--brand);color:var(--brand)}
.theme-btn{width:38px;border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:11px;cursor:pointer;display:grid;place-items:center}
.menu-btn{display:none}
@keyframes slidein{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}

/* ---------- hero (home) ---------- */
.hero{padding:56px 0 40px;text-align:center;background:
  radial-gradient(600px 250px at 20% 0%,color-mix(in srgb,var(--brand) 16%,transparent),transparent),
  radial-gradient(600px 260px at 85% 10%,color-mix(in srgb,var(--brand-2) 14%,transparent),transparent)}
.hero h1{max-width:820px;margin:0 auto 14px}
.hero p{max-width:640px;margin:0 auto 26px;color:var(--muted);font-size:1.06rem}
.hero .badge{display:inline-flex;align-items:center;gap:8px;font-size:.78rem;font-weight:700;color:var(--brand);
  background:color-mix(in srgb,var(--brand) 10%,var(--surface));border:1px solid color-mix(in srgb,var(--brand) 28%,transparent);
  padding:6px 12px;border-radius:999px;margin-bottom:18px}
.hero-tools{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;max-width:920px;margin:34px auto 0}
.hero-tools a{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:16px 12px;font-weight:650;
  color:var(--text);transition:.18s;box-shadow:var(--shadow);display:flex;flex-direction:column;align-items:center;gap:9px;font-size:.92rem}
.hero-tools a:hover{transform:translateY(-3px);border-color:var(--brand);box-shadow:0 12px 26px -14px color-mix(in srgb,var(--brand) 55%,transparent)}
.hero-tools .ic{width:42px;height:42px}

/* ---------- icon ---------- */
.ic{width:24px;height:24px;stroke:var(--brand);stroke-width:1.8;fill:none;stroke-linecap:round;stroke-linejoin:round}
.ic.lg{width:46px;height:46px;stroke-width:1.6}
.tool-icon{width:52px;height:52px;flex:none;display:grid;place-items:center;border-radius:14px;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff}
.tool-icon svg{width:26px;height:26px}
.tool-icon.tag2{background:linear-gradient(135deg,#0ea5e9,#6366f1)}
.tool-icon.tag3{background:linear-gradient(135deg,#10b981,#0ea5e9)}
.tool-icon.tag4{background:linear-gradient(135deg,#f59e0b,#ef4444)}
.tool-icon.tag5{background:linear-gradient(135deg,#ec4899,#8b5cf6)}

/* ---------- sections home ---------- */
.section{padding:34px 0}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:18px}
.section-head p{color:var(--muted);margin:0;font-size:.93rem}
.cat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px}
.cat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.cat-card h3{margin-top:14px}
.cat-card .desc{color:var(--muted);font-size:.9rem}
.cat-card ul{list-style:none;margin:14px 0 4px;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.cat-card li a{font-size:.82rem;font-weight:600;background:var(--surface-2);border:1px solid var(--border);
  padding:5px 10px;border-radius:999px;color:var(--text)}
.cat-card li a:hover{background:color-mix(in srgb,var(--brand) 12%,transparent);color:var(--brand)}
.feature-band{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:16px;margin-top:8px}
.feature{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.feature .ic{width:30px;height:30px;margin-bottom:12px;stroke-width:1.6}
.feature h3{margin-bottom:4px}
.feature p{color:var(--muted);font-size:.9rem;margin:0}

/* ---------- tool page ---------- */
.crumb{font-size:.82rem;color:var(--muted);padding:20px 0 0;display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.crumb a{color:var(--muted);text-decoration:none}
.crumb a:hover{color:var(--brand)}
.crumb span{opacity:.5}
.tool-hero{display:flex;gap:20px;align-items:flex-start;padding:26px 0 8px}
.tool-title h1{font-size:clamp(1.6rem,4vw,2.2rem)}
.tool-title .sub{color:var(--muted);margin-top:6px;max-width:760px}
.tool-title .metrics{margin-top:14px;display:flex;flex-wrap:wrap;gap:10px}
.metric{font-size:.76rem;font-weight:600;color:var(--muted);background:var(--surface-2);border:1px solid var(--border);
  padding:5px 11px;border-radius:999px;display:inline-flex;gap:6px;align-items:center}

.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);
  padding:clamp(18px,3.4vw,30px);margin:10px 0 26px;animation:slidein .3s ease}
.panel h2{display:flex;align-items:center;gap:10px;margin-bottom:18px}
.panel h2 .ic{width:20px;height:20px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.grid-2.gap-lg{gap:20px}
.label{display:block;font-size:.82rem;font-weight:650;margin:0 0 6px;color:var(--muted)}
.field{margin-bottom:16px}
.out{background:var(--text);color:var(--bg);border-radius:14px;padding:18px;font-weight:700;font-size:1.5rem;min-height:76px;
  display:flex;align-items:center;gap:12px;flex-wrap:wrap;word-break:break-all}
.out small{font-weight:500;opacity:.6;font-size:.85rem}
.out .copy{width:34px;height:34px;flex:none;margin-left:auto;border-radius:9px;background:color-mix(in srgb,var(--bg) 12%,transparent);
  border:none;color:var(--bg);cursor:pointer;display:grid;place-items:center}
.out .copy:hover{background:color-mix(in srgb,var(--bg) 22%,transparent)}
.out .copy svg{width:17px;height:17px}
.out.col{flex-direction:column;align-items:stretch;font-size:1.05rem;gap:6px;font-weight:600}
.out .dots{display:flex;gap:4px}
.out .dot{width:9px;height:9px;border-radius:50%;background:var(--brand)}
.green{color:#10b981}
.blue{color:#38bdf8}
.pink{color:#f472b6}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.95em}
.grid-3{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:18px}
select,input[type=text],input[type=number],input[type=date],input[type=password],select,textarea{
  width:100%;padding:11px 13px;border-radius:11px;border:1px solid var(--border);background:var(--bg);color:var(--text);
  font-size:.95rem;font-family:inherit;outline:none;transition:.15s}
select:focus,input:focus,textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px color-mix(in srgb,var(--brand) 16%,transparent)}
textarea{resize:vertical;min-height:110px}
.btn{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;border:none;border-radius:11px;padding:12px 20px;
  font-weight:700;font-size:.95rem;cursor:pointer;transition:.15s;display:inline-flex;align-items:center;gap:8px;font-family:inherit}
.btn:hover{transform:translateY(-1px);box-shadow:0 10px 22px -10px color-mix(in srgb,var(--brand) 70%,transparent)}
.btn.btn-sm{padding:8px 13px;font-size:.85rem}
.btn[data-ghost]{background:transparent;border:1px solid var(--border);color:var(--text)}
.btn[data-ghost]:hover{color:var(--brand);border-color:var(--brand);box-shadow:none}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.row .grow{flex:1}
.result-note{font-size:.92rem;color:var(--muted);background:var(--surface-2);border-radius:10px;padding:10px 14px;margin-top:14px}
.result-note b{color:var(--text)}
input[type=range]{width:100%;accent-color:var(--brand)}
.range-wrap .val{font-weight:750;color:var(--brand);font-size:1.05rem}
.tool-nav{margin-top:14px}
.tabs-badges{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.tab{background:var(--surface-2);border:1px solid var(--border);color:var(--text);border-radius:999px;padding:7px 14px;
  font-size:.84rem;font-weight:600;cursor:pointer}
.tab.active{background:var(--brand);border-color:var(--brand);color:#fff}
.tab-pane{display:none}
.tab-pane.active{display:block;animation:slidein .25s ease}
pre.out{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.95rem;white-space:pre-wrap;word-break:break-word}
.hint{font-size:.8rem;color:var(--muted);margin-top:6px}
.footer-off{height:14px}

/* ---------- info sections ---------- */
.info{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:clamp(20px,4vw,34px);margin:26px 0;box-shadow:var(--shadow)}
.info h2{display:flex;align-items:center;gap:10px}
.info h2 .ic{width:20px;height:20px}
.info ul{padding-left:20px;color:var(--muted)}
.info li{margin-bottom:8px}
.faq-item{border-bottom:1px solid var(--border);padding:14px 0}
.faq-item:last-of-type{border-bottom:none}
.faq-q{display:flex;justify-content:space-between;align-items:center;gap:12px;cursor:pointer;font-weight:650;padding:6px 0;background:none;border:none;color:var(--text);font-size:1rem;text-align:left;width:100%;font-family:inherit}
.faq-q svg{flex:none;width:18px;height:18px;transition:.2s;stroke:var(--muted)}
.faq-item.open .faq-q svg{rotate:180deg}
.faq-a{color:var(--muted);font-size:.95rem;max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-item.open .faq-a{max-height:400px}
.faq-a>div{padding-top:8px}

/* ---------- articles ---------- */
.art-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:16px}
.art-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);display:flex;flex-direction:column}
.art-card h3{font-size:1rem}
.art-card .meta{font-size:.76rem;color:var(--muted);margin-bottom:8px}
.art-card p{color:var(--muted);font-size:.9rem;flex:1}
.art-body{max-width:760px;margin:0 auto;padding:30px 0 20px}
.art-body h2{margin-top:40px}
.art-body p,.art-body li{color:#3a4157}
html.dark .art-body p,html.dark .art-body li{color:var(--muted)}
.art-body code{background:var(--surface-2);padding:2px 6px;border-radius:6px;font-size:.9em}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--border);margin-top:60px;background:var(--surface);padding:44px 0 26px}
.foot-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:28px;margin-bottom:30px}
.foot h4{font-size:.82rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-bottom:12px}
.foot a{display:block;color:var(--text);font-size:.9rem;padding:4px 0;opacity:.85}
.foot a:hover{color:var(--brand);opacity:1}
.foot-bottom{border-top:1px solid var(--border);padding-top:20px;font-size:.82rem;color:var(--muted);display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{font-size:.76rem;color:var(--muted)}
.chip a{color:var(--muted);text-decoration:none}
.chip a:hover{color:var(--brand);text-decoration:underline}

/* ---------- misc ---------- */
.code-pill{font-family:ui-monospace,monospace;background:var(--surface-2);border:1px solid var(--border);border-radius:6px;padding:1px 6px;font-size:.85em}
.calcbox{background:var(--bg);border:1px solid var(--border);border-radius:12px;padding:16px}
.toast{position:fixed;bottom:22px;left:50%;translate:-50%;background:var(--text);color:var(--bg);padding:10px 18px;
  border-radius:11px;font-size:.86rem;font-weight:650;box-shadow:0 12px 30px -10px rgba(0,0,0,.4);z-index:99;opacity:0;transform:translateY(8px);transition:.25s;pointer-events:none}
.toast.show{opacity:1;transform:none}
@media (max-width:720px){
  .nav-links{display:none}
  .burger{display:grid;background:transparent;border:1px solid var(--border);color:var(--text);
    width:38px;height:38px;border-radius:10px;place-items:center;cursor:pointer}
  .hero{padding-top:36px}
  .grid-2{grid-template-columns:1fr}
  .section-head{flex-direction:column;align-items:flex-start}
}
/* search results */
#suggest{position:absolute;top:calc(100% + 6px);left:0;right:0;background:var(--surface);border:1px solid var(--border);
  border-radius:12px;box-shadow:var(--shadow);z-index:60;display:none;overflow:hidden;max-height:340px;overflow-y:auto}
#suggest.show{display:block}
#suggest a{display:flex;align-items:center;gap:10px;padding:10px 14px;color:var(--text);font-size:.9rem;font-weight:600}
#suggest a:hover{background:var(--surface-2)}
#suggest .hint{font-size:.72rem;color:var(--muted);margin-left:auto}

/* tool-specific niceties */
.pw{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:1.25rem;word-break:break-all;letter-spacing:.5px}
.stat-big{font-size:2rem;font-weight:800}
.big{font-weight:800;font-size:clamp(2.4rem,8vw,3.6rem);letter-spacing:-.03em;margin:8px 0;font-variant-numeric:tabular-nums}
.break{word-break:break-all;line-height:1.5}
.coin-box{width:130px;height:130px;margin:0 auto 14px;border-radius:50%;display:grid;place-items:center;font-weight:800;font-size:1.2rem;
  color:#fff;background:radial-gradient(circle at 30% 30%,#b45309,#78350f 70%);box-shadow:0 10px 30px -8px rgba(120,53,15,.55), inset 0 0 0 6px rgba(255,255,255,.18)}
.chk-list label{display:flex;align-items:center;gap:8px;font-size:.95rem;cursor:pointer;padding:4px 0}
.chk-list input,.calcbox input[type=checkbox]{accent-color:var(--brand);width:17px;height:17px}
.out .break{font-size:.95rem}
.out.break{word-break:break-all}
.stat-num{font-size:1.6rem;font-weight:800;color:var(--brand)}
/* ---------- new components (10x upgrade) ---------- */
.meter{background:var(--surface-2);border:1px solid var(--border);border-radius:99px;height:14px;overflow:hidden;margin:10px 0 6px}
.meter-bar{display:block;height:100%;width:0;border-radius:99px;background:var(--border);transition:width .25s ease,background .25s ease}
.meter-bar.red{background:linear-gradient(90deg,#ef4444,#f97316)}
.meter-bar.amber{background:linear-gradient(90deg,#f59e0b,#eab308)}
.meter-bar.green{background:linear-gradient(90deg,#22c55e,#10b981)}
.hists{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-top:10px}
.hists .label{font-size:.75rem}
button.chip{background:var(--surface-2);border:1px solid var(--border);border-radius:99px;padding:3px 10px;font-size:.78rem;color:var(--text);cursor:pointer;max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
button.chip:hover{border-color:var(--brand);color:var(--brand)}
.swatch{display:inline-block;width:22px;height:22px;border-radius:6px;vertical-align:middle;border:1px solid var(--border)}
.swatch-card{border:1px solid var(--border);border-radius:14px;overflow:hidden;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease}
.swatch-card:hover{transform:translateY(-2px);box-shadow:0 10px 24px -12px rgba(99,102,241,.5)}
.swatch-big{height:64px}
.swatch-meta{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:8px 10px;background:var(--bg);font-family:ui-monospace,monospace;font-size:.8rem}
.swatch-meta.ondark{color:#fff}
.swatch-meta .lock{display:flex;align-items:center;gap:4px;font-family:inherit;font-size:.72rem;color:var(--muted);cursor:pointer}
.swatch-meta input[type=checkbox]{accent-color:var(--brand);width:14px;height:14px}
.table-wrap{margin-top:18px}
.table-scroll{overflow-x:auto;border:1px solid var(--border);border-radius:12px}
table{width:100%;border-collapse:collapse;font-size:.9rem;min-width:480px}
th,td{text-align:left;padding:8px 12px;border-bottom:1px solid var(--border)}
th{background:var(--surface-2);font-size:.78rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
tr:last-child td{border-bottom:none}
.nav-search.nf{position:relative;margin:14px 0}
#nf-list{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
#nf-list a{display:inline-block;background:var(--surface-2);border:1px solid var(--border);border-radius:8px;padding:5px 12px;color:var(--text);text-decoration:none;font-size:.88rem}
#nf-list a:hover{border-color:var(--brand);color:var(--brand)}
.art-card.sm{padding:14px}
.art-card.sm h3{font-size:1rem}
.art-grid.one{grid-template-columns:1fr}
@media(max-width:640px){.art-grid.one{grid-template-columns:1fr}}

/* ---------- media toolbox ---------- */
.dropzone{border:1.5px dashed var(--border);border-radius:14px;padding:22px 16px;text-align:center;
  background:var(--surface);margin-bottom:18px;transition:.18s}
.dropzone.over{border-color:var(--brand);background:color-mix(in srgb,var(--brand) 6%,var(--surface))}
.dropzone .btn{margin-bottom:8px}
.dropzone .hint{color:var(--muted);font-size:.82rem;margin-top:4px;word-break:break-all}
.out.col img{max-width:100%;height:auto;border-radius:10px;margin-bottom:6px}
.out.col a.btn{background:var(--brand);color:#fff;text-decoration:none}
#st{transition:.2s;border-left:3px solid var(--brand)}
.panel .dropzone+.grid-2{margin-top:6px}