/* ============================================================
   Toolbench — design system v2  ("Precision instruments")
   Confident dark hero + light workbench body.
   Monospace instrument labels, layered depth, tasteful motion.
   ============================================================ */

:root{
  --paper:#F6F5F1;
  --panel:#FFFFFF;
  --ink:#16171B;
  --ink-2:#2C2F36;
  --muted:#6A6F78;
  --faint:#9AA0A8;
  --line:#E6E5DE;
  --line-2:#EFEEE8;
  --accent:#2B41D8;
  --accent-ink:#1E31B4;
  --accent-soft:rgba(43,65,216,.08);
  --signal:#E39B1C;
  --ok:#178a5f;
  --danger:#CE4436;
  --dark:#111318;
  --dark-2:#181B21;
  --radius:12px;
  --radius-sm:9px;
  --maxw:1120px;
  --shadow-sm:0 1px 2px rgba(20,23,31,.05),0 1px 1px rgba(20,23,31,.03);
  --shadow-md:0 6px 20px -6px rgba(20,23,31,.12),0 2px 6px -2px rgba(20,23,31,.06);
  --shadow-lg:0 16px 40px -12px rgba(20,23,31,.22),0 4px 10px -4px rgba(20,23,31,.08);
  --font-display:'Space Grotesk',system-ui,sans-serif;
  --font-body:'Inter',system-ui,sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,'SFMono-Regular',Menlo,monospace;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font-body);color:var(--ink);background-color:var(--paper);
  background-image:linear-gradient(var(--line-2) 1px,transparent 1px),
    linear-gradient(90deg,var(--line-2) 1px,transparent 1px);
  background-size:28px 28px;background-position:-1px -1px;
  line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(246,245,241,.82);
  backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;gap:20px;height:66px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--font-display);
  font-weight:700;font-size:19px;color:var(--ink);letter-spacing:-.02em}
.brand:hover{text-decoration:none}
.brand .mark{width:28px;height:28px;border:2px solid var(--ink);border-radius:7px;
  display:grid;place-items:center;position:relative;flex:0 0 auto;transition:transform .3s}
.brand .mark::before{content:"";width:11px;height:11px;background:var(--accent);border-radius:2.5px}
.brand:hover .mark{transform:rotate(90deg)}
.nav{display:flex;gap:24px;margin-left:auto;align-items:center}
.nav a{color:var(--muted);font-size:14.5px;font-weight:500;transition:color .15s}
.nav a:hover{color:var(--ink);text-decoration:none}
.nav a.cta{color:#fff;background:var(--ink);padding:9px 16px;border-radius:8px;font-weight:600;
  box-shadow:var(--shadow-sm)}
.nav a.cta:hover{background:#000;transform:translateY(-1px)}
.menu-btn{display:none;margin-left:auto;background:var(--panel);border:1px solid var(--line);
  border-radius:8px;padding:8px 11px;font-size:14px;cursor:pointer;font-weight:500}
@media(max-width:760px){
  .nav{display:none;position:absolute;top:66px;left:0;right:0;flex-direction:column;
    background:var(--panel);border-bottom:1px solid var(--line);padding:14px 22px;gap:6px;
    box-shadow:var(--shadow-md)}
  .nav.open{display:flex}
  .nav a{padding:9px 0}
  .nav a.cta{text-align:center}
  .menu-btn{display:block}
}

/* ---------- dark hero ---------- */
.hero-dark{position:relative;background:var(--dark);color:#EEF0F3;overflow:hidden;
  border-bottom:1px solid #23262E}
.hero-dark::before{content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:28px 28px;pointer-events:none}
.hero-dark::after{content:"";position:absolute;top:-30%;right:-10%;width:60%;height:150%;
  background:radial-gradient(closest-side,rgba(43,65,216,.28),transparent 70%);
  pointer-events:none;filter:blur(10px)}
.hero-dark .wrap{position:relative;z-index:1;padding:74px 22px 78px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
@media(max-width:900px){.hero-grid{grid-template-columns:1fr;gap:38px}.hero-dark .wrap{padding:56px 22px 60px}}

.eyebrow-d{font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;
  color:#8FA0FF;margin:0 0 18px;display:flex;align-items:center;gap:10px}
.eyebrow-d::before{content:"";width:22px;height:1px;background:#8FA0FF}
.hero-dark h1{font-family:var(--font-display);font-weight:700;letter-spacing:-.035em;
  font-size:clamp(36px,5.6vw,58px);line-height:1.03;margin:0 0 20px;color:#fff;max-width:15ch}
.hero-dark h1 .hl{color:#9DABFF}
.hero-dark .lead{font-size:clamp(16px,2.3vw,19px);color:#B6BAC3;max-width:46ch;margin:0 0 30px;line-height:1.6}
.hero-dark .actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:26px}
.trust{display:flex;flex-wrap:wrap;gap:8px}
.badge{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:#C4C8D0;
  border:1px solid #2C3038;border-radius:99px;padding:6px 12px;background:rgba(255,255,255,.02)}
.badge b{color:#9DABFF;font-weight:500}

/* hero live demo panel */
.demo{position:relative;background:var(--dark-2);border:1px solid #262A32;border-radius:16px;
  padding:22px;box-shadow:0 30px 60px -20px rgba(0,0,0,.6)}
.demo .tick{position:absolute;width:9px;height:9px;border:1.5px solid #3A3F49}
.demo .tick.tl{top:10px;left:10px;border-right:0;border-bottom:0}
.demo .tick.tr{top:10px;right:10px;border-left:0;border-bottom:0}
.demo .tick.bl{bottom:10px;left:10px;border-right:0;border-top:0}
.demo .tick.br{bottom:10px;right:10px;border-left:0;border-top:0}
.demo-label{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  color:#7A808C;margin:0 0 12px;display:flex;align-items:center;justify-content:space-between}
.demo-label .live{display:flex;align-items:center;gap:7px;color:#8A909C}
.demo-label .dot{width:7px;height:7px;border-radius:50%;background:#3DDC84;box-shadow:0 0 0 0 rgba(61,220,132,.6);
  animation:pulse 2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(61,220,132,.5)}70%{box-shadow:0 0 0 7px rgba(61,220,132,0)}100%{box-shadow:0 0 0 0 rgba(61,220,132,0)}}
.demo textarea{width:100%;min-height:120px;resize:none;background:#0E1015;color:#E7E9EE;
  border:1px solid #2A2E37;border-radius:10px;padding:13px;font-family:var(--font-body);
  font-size:15px;line-height:1.6;outline:none}
.demo textarea:focus{border-color:#3A57F0;box-shadow:0 0 0 3px rgba(58,87,240,.22)}
.demo-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;margin-top:16px;
  background:#262A32;border:1px solid #262A32;border-radius:10px;overflow:hidden}
.demo-stat{background:var(--dark-2);padding:14px 10px;text-align:center}
.demo-stat .n{font-family:var(--font-mono);font-size:24px;color:#fff;line-height:1}
.demo-stat .l{font-family:var(--font-mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;
  color:#7A808C;margin-top:6px}
.demo-cta{margin-top:15px;text-align:right}
.demo-cta a{font-family:var(--font-mono);font-size:12px;color:#9DABFF;letter-spacing:.04em}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:15px;
  padding:12px 20px;border-radius:var(--radius-sm);border:1px solid transparent;cursor:pointer;
  font-family:var(--font-body);transition:transform .06s,box-shadow .15s,background .15s;text-decoration:none}
.btn:hover{text-decoration:none}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--accent);color:#fff;box-shadow:var(--shadow-sm)}
.btn-primary:hover{background:var(--accent-ink);box-shadow:var(--shadow-md);transform:translateY(-1px)}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-ghost{background:var(--panel);color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--muted)}
.btn-dark-ghost{background:transparent;color:#EDEFF3;border-color:#333842}
.btn-dark-ghost:hover{border-color:#5b6270;background:rgba(255,255,255,.03)}
.btn-sm{padding:8px 13px;font-size:13.5px}

/* ---------- page shell ---------- */
.page{padding:44px 0 64px}
.crumb{font-family:var(--font-mono);font-size:12px;color:var(--muted);margin:0 0 20px;letter-spacing:.03em}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--accent)}
.tool-head{display:flex;align-items:center;gap:12px;margin:0 0 12px}
.chip{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--accent);background:var(--accent-soft);border:1px solid rgba(43,65,216,.18);
  padding:4px 10px;border-radius:99px}
.page h1.title{font-family:var(--font-display);font-weight:700;letter-spacing:-.025em;
  font-size:clamp(30px,4.6vw,44px);margin:0;line-height:1.05}
.page .subtitle{color:var(--muted);font-size:17.5px;margin:14px 0 32px;max-width:62ch;line-height:1.55}

/* ---------- panels ---------- */
.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow-sm)}
.panel + .panel{margin-top:20px}
.panel-label{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);margin:0 0 14px;display:flex;align-items:center;gap:9px}
.panel-label::before{content:"";width:7px;height:7px;background:var(--accent);border-radius:50%;flex:0 0 auto}

label.field{display:block;font-size:13px;font-weight:600;margin:0 0 7px;color:var(--ink-2)}
textarea,input[type=text],input[type=number],input[type=date],input[type=url],select{
  width:100%;font-family:var(--font-body);font-size:15px;color:var(--ink);background:var(--paper);
  border:1px solid var(--line);border-radius:var(--radius-sm);padding:12px 13px;outline:none;
  transition:border-color .12s,box-shadow .12s}
textarea{min-height:150px;resize:vertical;line-height:1.6}
textarea:focus,input:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
textarea.mono,input.mono{font-family:var(--font-mono);font-size:14px}
.row{display:flex;gap:13px;flex-wrap:wrap;align-items:flex-end}
.row > *{flex:1;min-width:140px}
.controls{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}

/* readout stats */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:1px;
  background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.stat{background:var(--panel);padding:18px 14px;text-align:center;transition:background .15s}
.stat:hover{background:#FBFBFA}
.stat .num{font-family:var(--font-mono);font-size:27px;font-weight:500;color:var(--ink);line-height:1}
.stat .lbl{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--muted);margin-top:8px}

.output{font-family:var(--font-mono);font-size:14px;background:var(--paper);border:1px solid var(--line);
  border-radius:var(--radius-sm);padding:13px;white-space:pre-wrap;word-break:break-word;min-height:48px}

.checks{display:flex;gap:10px;flex-wrap:wrap}
.check{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);background:var(--panel);
  border-radius:var(--radius-sm);padding:10px 14px;cursor:pointer;font-size:14px;user-select:none;
  transition:border-color .12s,background .12s}
.check input{accent-color:var(--accent);width:16px;height:16px}
.check.on{border-color:var(--accent);background:var(--accent-soft)}

input[type=range]{width:100%;accent-color:var(--accent)}
.hint{font-size:13px;color:var(--muted);margin-top:10px;line-height:1.55}
.meter{height:8px;border-radius:99px;background:var(--line);overflow:hidden;margin-top:12px}
.meter > span{display:block;height:100%;width:0;background:var(--danger);transition:width .25s,background .25s}

/* ---------- section headings ---------- */
.section-head{display:flex;align-items:baseline;justify-content:space-between;margin:52px 0 18px;gap:16px}
.section-head h2{font-family:var(--font-display);font-size:15px;font-weight:600;letter-spacing:.02em;
  color:var(--ink);margin:0;display:flex;align-items:center;gap:11px}
.section-head h2 .ix{font-family:var(--font-mono);font-size:12px;color:var(--accent);font-weight:400}
.section-head .count{font-family:var(--font-mono);font-size:12px;color:var(--faint);letter-spacing:.05em}
.section-rule{height:1px;background:var(--line);margin-top:4px}

/* ---------- tool grid ---------- */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.card{position:relative;display:block;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius);padding:20px 20px 20px 22px;box-shadow:var(--shadow-sm);
  transition:border-color .15s,transform .12s,box-shadow .15s;overflow:hidden}
.card::before{content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;border-radius:0 3px 3px 0;
  background:var(--accent);transform:scaleY(0);transform-origin:top;transition:transform .2s}
.card:hover{border-color:#D3D2CA;text-decoration:none;transform:translateY(-3px);box-shadow:var(--shadow-md)}
.card:hover::before{transform:scaleY(1)}
.card .idx{font-family:var(--font-mono);font-size:11px;color:var(--accent);letter-spacing:.12em}
.card h3{font-family:var(--font-display);font-size:18.5px;font-weight:600;margin:9px 0 7px;
  color:var(--ink);letter-spacing:-.01em}
.card p{margin:0;font-size:14px;color:var(--muted);line-height:1.5}
.card .go{position:absolute;top:20px;right:20px;color:var(--faint);font-size:15px;transition:transform .2s,color .2s}
.card:hover .go{transform:translateX(3px);color:var(--accent)}

/* ---------- prose ---------- */
.prose{max-width:70ch}
.prose h2{font-family:var(--font-display);font-size:22px;margin:34px 0 12px;letter-spacing:-.01em}
.prose h3{font-family:var(--font-display);font-size:17px;margin:24px 0 8px}
.prose p,.prose li{color:var(--ink-2);font-size:16px;line-height:1.7}
.prose ul{padding-left:20px}
.prose code{font-family:var(--font-mono);font-size:.9em;background:var(--paper);border:1px solid var(--line);
  padding:1px 6px;border-radius:5px}
.related{margin-top:40px}

/* ---------- ad slots ---------- */
.ad-slot{margin:30px auto;text-align:center;min-height:90px;display:flex;align-items:center;justify-content:center}
.ad-slot .ph{font-family:var(--font-mono);font-size:11px;color:#BFC1C6;letter-spacing:.1em;
  border:1px dashed var(--line);border-radius:var(--radius-sm);padding:32px 20px;width:100%}

/* ---------- footer ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--panel);margin-top:56px}
.site-footer .wrap{padding:44px 22px;display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:32px}
.site-footer .brand{margin-bottom:12px}
.site-footer p.tag{color:var(--muted);font-size:14px;max-width:34ch;margin:0;line-height:1.6}
.site-footer h4{font-family:var(--font-mono);font-size:11px;letter-spacing:.13em;text-transform:uppercase;
  color:var(--faint);margin:0 0 14px}
.site-footer a{display:block;color:var(--ink-2);font-size:14px;padding:5px 0;transition:color .12s}
.site-footer a:hover{color:var(--accent);text-decoration:none}
.copyright{border-top:1px solid var(--line);text-align:center;color:var(--muted);font-size:13px;padding:18px 22px;
  font-family:var(--font-mono);letter-spacing:.03em}
@media(max-width:760px){.site-footer .wrap{grid-template-columns:1fr;gap:24px}}

/* ---------- toast ---------- */
.toast{position:fixed;bottom:26px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--ink);
  color:#fff;padding:12px 20px;border-radius:10px;font-size:14px;font-weight:500;opacity:0;pointer-events:none;
  transition:opacity .2s,transform .2s;z-index:100;box-shadow:var(--shadow-lg)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------- motion ---------- */
.rise{opacity:0;transform:translateY(14px);animation:rise .6s cubic-bezier(.2,.7,.2,1) forwards}
.rise.d1{animation-delay:.06s}.rise.d2{animation-delay:.12s}.rise.d3{animation-delay:.18s}.rise.d4{animation-delay:.24s}
@keyframes rise{to{opacity:1;transform:none}}

:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
  .rise{opacity:1;transform:none}
}