/* ==========================================================================
   HYDRA Tools — shared design system + UI kit
   Polestar Technology · polestartech.co/tools/

   This is the ONE stylesheet every tool page links. It is a deliberate
   exception to the rest of the site (which inlines <style> per page) —
   see public/tools/README.md for why. The design tokens below are copied
   byte-for-byte from the site's V7 system (public/insights/*.html) so tool
   pages are visually indistinguishable from the rest of polestartech.co.
   ========================================================================== */

:root{
  --bg:#020202;
  --surface:#0C0C0C;
  --surface-2:#111214;
  --cyan:#00D4FF;
  --green:#00FF88;
  --red:#FF4D4D;
  --amber:#FFB020;
  --white:#EFEFEF;
  --gray:#6B7280;
  --gray-dim:#444;
  --border:rgba(255,255,255,0.06);
  --border-2:rgba(255,255,255,0.12);
  --mono:'JetBrains Mono', monospace;
  --head:'Bebas Neue', sans-serif;
  --body:'Syne', sans-serif;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;cursor:crosshair}
body{background:var(--bg);color:var(--white);font-family:var(--body);font-size:16px;line-height:1.7;font-weight:300;-webkit-font-smoothing:antialiased;overflow-x:hidden}
::selection{background:var(--cyan);color:#000}
a{color:inherit}
h1,h2,h3,h4{font-family:var(--head);font-weight:400;letter-spacing:1px;color:var(--white)}
p{color:var(--gray)}
strong{color:var(--white);font-weight:600}
code{font-family:var(--mono)}
button{font-family:var(--body);cursor:crosshair}
input,select,textarea{font-family:var(--body)}

/* ---- layout shell ---- */
.wrap{max-width:1180px;margin:0 auto;padding:0 6vw}
@media(max-width:900px){.wrap{padding:0 24px}}

/* ---- NAV (copied from public/index.html nav pattern + Tools link) ---- */
nav{position:fixed;top:0;left:0;right:0;z-index:200;padding:20px 6vw;display:flex;justify-content:space-between;align-items:center;transition:all 0.4s}
nav.scrolled{background:rgba(2,2,2,0.92);backdrop-filter:blur(20px);border-bottom:1px solid var(--border)}
.nav-logo{font-family:var(--head);font-size:20px;letter-spacing:5px;color:var(--white);text-decoration:none;display:flex;align-items:center;gap:10px}
.nav-logo .logo-dot{width:8px;height:8px;background:var(--cyan);border-radius:50%;animation:logoPulse 2s infinite}
@keyframes logoPulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:0.4;transform:scale(0.7)}}
.nav-links{display:flex;gap:32px;list-style:none;align-items:center}
.nav-links a{font-family:var(--mono);font-size:10px;letter-spacing:2px;text-transform:uppercase;color:var(--gray);text-decoration:none;transition:color 0.3s}
.nav-links a:hover,.nav-links a.active{color:var(--cyan)}
.nav-cohort{background:linear-gradient(135deg,#00D4FF,#00FF88);color:#000!important;padding:8px 16px;border-radius:2px;font-weight:700!important;position:relative}
.nav-cohort:hover{background:linear-gradient(135deg,#00FF88,#00D4FF)!important;color:#000!important}
.nav-cta{font-family:var(--mono);font-size:10px;letter-spacing:2px;text-transform:uppercase;color:#000;background:var(--cyan);padding:10px 22px;border:none;cursor:crosshair;transition:all 0.3s;text-decoration:none}
.nav-cta:hover{background:var(--white);transform:translateY(-1px)}
.nav-account{display:flex;align-items:center;gap:14px}
.nav-account-chip{width:28px;height:28px;border-radius:50%;background:rgba(0,212,255,0.15);border:1px solid var(--cyan);display:none;align-items:center;justify-content:center;font-family:var(--mono);font-size:11px;color:var(--cyan);text-decoration:none}
.nav-account-chip.visible{display:flex}
.nav-signin{font-family:var(--mono);font-size:10px;letter-spacing:2px;text-transform:uppercase;color:var(--gray);text-decoration:none;border:1px solid var(--border-2);padding:9px 16px}
.nav-signin:hover{color:var(--white);border-color:var(--cyan)}
@media(max-width:900px){nav{padding:16px 24px}.nav-links{display:none}}

/* ---- FOOTER (copied from public/index.html footer pattern) ---- */
footer{padding:40px 6vw;border-top:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.footer-logo{font-family:var(--head);font-size:16px;letter-spacing:5px;color:var(--white)}
.footer-logo em{color:var(--cyan);font-style:normal}
.footer-copy{font-family:var(--mono);font-size:10px;color:var(--gray-dim);letter-spacing:1px}
.footer-links{display:flex;gap:20px;list-style:none;font-family:var(--mono);font-size:10px;letter-spacing:1px}
.footer-links a{color:var(--gray-dim);text-decoration:none}
.footer-links a:hover{color:var(--cyan)}
@media(max-width:900px){footer{flex-direction:column;text-align:center}}

/* ---- TOOL HERO ---- */
.tool-hero{padding:150px 6vw 56px;max-width:900px}
.tool-eyebrow{display:flex;align-items:center;gap:14px;margin-bottom:22px;flex-wrap:wrap}
.tag{font-family:var(--mono);font-size:10px;letter-spacing:0.15em;text-transform:uppercase;color:var(--cyan);border:1px solid var(--cyan);padding:4px 12px}
.tag-free{color:var(--green);border-color:var(--green)}
.breadcrumb{font-family:var(--mono);font-size:10px;color:var(--gray-dim);letter-spacing:0.08em}
.breadcrumb a{color:var(--gray-dim);text-decoration:none}
.breadcrumb a:hover{color:var(--cyan)}
.tool-hero h1{font-size:clamp(38px,5.4vw,64px);line-height:0.98;margin-bottom:20px}
.tool-hero h1 em{font-style:normal;color:var(--cyan)}
.tool-lead{font-size:17px;line-height:1.65;color:var(--gray);max-width:680px;border-left:2px solid var(--cyan);padding-left:22px}
@media(max-width:900px){.tool-hero{padding:120px 24px 40px}}

/* ---- SAFETY / WARNING BANNER (non-dismissible by design) ---- */
.safety-banner{background:rgba(255,77,77,0.06);border:1px solid rgba(255,77,77,0.35);border-left:3px solid var(--red);padding:20px 24px;margin:0 6vw 40px;max-width:900px}
.safety-banner .label{font-family:var(--mono);font-size:10px;letter-spacing:0.15em;text-transform:uppercase;color:var(--red);margin-bottom:10px;display:flex;align-items:center;gap:8px}
.safety-banner p{color:var(--white);opacity:0.85;font-size:14px;line-height:1.7;margin:0}
.safety-banner strong{color:var(--red)}
@media(max-width:900px){.safety-banner{margin:0 24px 32px}}

/* ---- MAIN TOOL BODY ---- */
.tool-body{max-width:1180px;margin:0 auto;padding:0 6vw 100px;display:grid;grid-template-columns:minmax(320px,420px) 1fr;gap:48px;align-items:start}
@media(max-width:1000px){.tool-body{grid-template-columns:1fr;padding:0 24px 80px}}

/* ---- INPUT PANEL ---- */
.panel{background:var(--surface);border:1px solid var(--border);padding:28px}
.panel + .panel{margin-top:20px}
.panel-title{font-family:var(--head);font-size:20px;letter-spacing:1px;margin-bottom:4px}
.panel-sub{font-family:var(--mono);font-size:10.5px;color:var(--gray-dim);letter-spacing:0.04em;margin-bottom:22px;line-height:1.6}

.field{margin-bottom:16px}
.field label{display:flex;justify-content:space-between;align-items:baseline;font-family:var(--mono);font-size:10px;letter-spacing:0.08em;text-transform:uppercase;color:var(--gray);margin-bottom:7px}
.field label .hint{color:var(--gray-dim);text-transform:none;letter-spacing:0;font-size:10.5px}
.field input[type=text],.field input[type=number],.field select,.field textarea{
  width:100%;background:var(--surface-2);border:1px solid var(--border-2);color:var(--white);
  padding:10px 12px;font-size:14px;font-family:var(--body);outline:none;transition:border-color 0.2s;
}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--cyan)}
.field textarea{resize:vertical;min-height:90px;font-family:var(--mono);font-size:12.5px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.field-row-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px}
@media(max-width:480px){.field-row,.field-row-3{grid-template-columns:1fr}}

.chip-group{display:flex;gap:8px;flex-wrap:wrap}
.chip{font-family:var(--mono);font-size:10.5px;letter-spacing:0.05em;padding:8px 14px;border:1px solid var(--border-2);background:var(--surface-2);color:var(--gray);cursor:crosshair;transition:all 0.15s}
.chip:hover{border-color:var(--cyan);color:var(--white)}
.chip.active{background:var(--cyan);border-color:var(--cyan);color:#000;font-weight:600}

.assumption-flag{display:inline-flex;align-items:center;gap:5px;font-family:var(--mono);font-size:9.5px;letter-spacing:0.05em;color:var(--amber);margin-top:5px}
.assumption-flag::before{content:'▲';font-size:8px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;font-family:var(--mono);font-size:11px;letter-spacing:0.1em;text-transform:uppercase;padding:14px 26px;border:none;cursor:crosshair;transition:all 0.2s;text-decoration:none}
.btn-primary{background:var(--cyan);color:#000;font-weight:700}
.btn-primary:hover{background:var(--white);transform:translateY(-1px)}
.btn-ghost{background:transparent;border:1px solid var(--border-2);color:var(--white)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn-block{width:100%}
.btn:disabled{opacity:0.4;cursor:not-allowed;transform:none!important}
.btn-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}

/* ---- RESULTS ---- */
.result-empty{border:1px dashed var(--border-2);padding:60px 30px;text-align:center;color:var(--gray-dim);font-family:var(--mono);font-size:11px;letter-spacing:0.05em}
.result-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1px;background:var(--border);border:1px solid var(--border);margin-bottom:24px}
.stat{background:var(--surface);padding:22px 20px}
.stat-label{font-family:var(--mono);font-size:9.5px;letter-spacing:0.1em;text-transform:uppercase;color:var(--gray-dim);margin-bottom:8px}
.stat-value{font-family:var(--head);font-size:30px;color:var(--cyan);line-height:1}
.stat-value .unit{font-family:var(--mono);font-size:12px;color:var(--gray);margin-left:4px}
.stat-value.warn{color:var(--amber)}
.stat-value.bad{color:var(--red)}
.stat-value.good{color:var(--green)}
.stat-delta{font-family:var(--mono);font-size:11px;margin-top:6px}
.stat-delta.up{color:var(--red)}
.stat-delta.down{color:var(--green)}

.verdict{display:inline-flex;align-items:center;gap:10px;font-family:var(--head);font-size:24px;letter-spacing:2px;padding:10px 22px;margin-bottom:20px}
.verdict-pass{background:rgba(0,255,136,0.1);color:var(--green);border:1px solid var(--green)}
.verdict-fail{background:rgba(255,77,77,0.1);color:var(--red);border:1px solid var(--red)}
.verdict-inconclusive{background:rgba(255,176,32,0.1);color:var(--amber);border:1px solid var(--amber)}

.section-label{font-family:var(--mono);font-size:10px;letter-spacing:0.15em;text-transform:uppercase;color:var(--cyan);margin:32px 0 14px;display:flex;align-items:center;gap:10px}
.section-label::after{content:'';flex:1;height:1px;background:var(--border)}
.section-label:first-child{margin-top:0}

/* ---- TABLES ---- */
.data-table{width:100%;border-collapse:collapse;font-size:13px;margin-bottom:8px}
.data-table th{font-family:var(--mono);font-size:9px;letter-spacing:0.12em;text-transform:uppercase;color:var(--gray-dim);text-align:left;padding:10px 14px;border-bottom:1px solid var(--border);background:var(--surface)}
.data-table td{padding:12px 14px;border-bottom:1px solid var(--border);color:var(--gray);vertical-align:top}
.data-table tr:hover td{background:rgba(0,212,255,0.02)}
.data-table .highlight{color:var(--white);font-weight:600}
.data-table .mono{font-family:var(--mono);font-size:12px}
.data-table .cyan{color:var(--cyan)}
.data-table-wrap{overflow-x:auto}

/* ---- LEDGER (assumption trail) ---- */
.ledger{border:1px solid var(--border);background:var(--surface)}
.ledger-item{display:flex;justify-content:space-between;gap:16px;padding:12px 16px;border-bottom:1px solid var(--border);font-size:13px}
.ledger-item:last-child{border-bottom:none}
.ledger-item .what{color:var(--white)}
.ledger-item .what .src{display:block;font-family:var(--mono);font-size:10.5px;color:var(--gray-dim);margin-top:3px}
.ledger-item .delta{font-family:var(--mono);font-size:13px;white-space:nowrap;color:var(--gray)}
.ledger-item .delta.assumed{color:var(--amber)}

/* ---- UNCERTAINTY BAND ---- */
.band{font-family:var(--mono);font-size:13px;color:var(--white)}
.band .range{color:var(--amber)}

/* ---- CALLOUT / BRIDGE TO HYDRA OS ---- */
.callout{background:var(--surface);border:1px solid var(--border);border-left:3px solid var(--cyan);padding:24px 26px;margin:32px 0}
.callout p{margin:0;font-size:14px;line-height:1.7;color:var(--gray)}
.callout-label{font-family:var(--mono);font-size:9px;letter-spacing:0.15em;text-transform:uppercase;color:var(--cyan);margin-bottom:10px;display:block}
.bridge{display:flex;align-items:center;justify-content:space-between;gap:24px;background:linear-gradient(135deg,rgba(0,212,255,0.06),rgba(0,255,136,0.04));border:1px solid var(--border-2);padding:26px 28px;margin-top:32px;flex-wrap:wrap}
.bridge p{margin:0;font-size:14px;color:var(--white);opacity:0.85;max-width:520px}
.bridge a{font-family:var(--mono);font-size:11px;letter-spacing:0.1em;text-transform:uppercase;color:#000;background:var(--cyan);padding:12px 22px;text-decoration:none;white-space:nowrap}
.bridge a:hover{background:var(--white)}

/* ---- CHARTS ---- */
.chart-wrap{background:var(--surface);border:1px solid var(--border);padding:20px;margin-bottom:24px}
.chart-wrap svg{width:100%;height:auto;display:block}
.chart-title{font-family:var(--mono);font-size:10px;letter-spacing:0.1em;text-transform:uppercase;color:var(--gray);margin-bottom:14px}
.chart-legend{display:flex;gap:18px;flex-wrap:wrap;margin-top:12px;font-family:var(--mono);font-size:10.5px;color:var(--gray)}
.chart-legend .sw{display:inline-block;width:10px;height:10px;border-radius:2px;margin-right:6px;vertical-align:-1px}

/* ---- SHARED RESULT-BLOCK PRIMITIVES ----
   These four were each defined locally, once, inside a single tool's own
   <style> block, then used (undefined) by other tools that assumed they
   were part of the shared kit -- found in a functional-QA pass. Moved here
   so every tool actually gets the same rule instead of the ones that
   happened to be defined elsewhere silently no-op'ing. */
.warn-box{background:rgba(255,176,32,0.06);border:1px solid rgba(255,176,32,0.3);border-left:3px solid var(--amber);padding:14px 18px;margin-bottom:12px;font-size:13px;color:var(--white);line-height:1.6}
.warn-box .code{display:block;font-family:var(--mono);font-size:9.5px;color:var(--amber);letter-spacing:0.08em;text-transform:uppercase;margin-bottom:6px}
.conditional{display:none}
.conditional.show{display:block}
.report-block{background:var(--surface);border:1px solid var(--border);padding:0}

/* ---- METHOD / SOURCES SECTION ---- */
.method{max-width:900px;margin:0 auto;padding:80px 6vw 100px;border-top:1px solid var(--border)}
.method h2{font-size:clamp(28px,3.4vw,40px);margin-bottom:24px}
.method h3{font-size:16px;margin:28px 0 10px;color:var(--cyan);font-family:var(--mono);letter-spacing:0.02em;text-transform:uppercase;font-size:12px}
.method p{font-size:14.5px;line-height:1.85;margin-bottom:16px}
.method .eq{font-family:var(--mono);font-size:13px;background:var(--surface);border:1px solid var(--border);padding:16px 20px;margin:16px 0;color:var(--cyan);overflow-x:auto;white-space:pre}
.method ul{margin:0 0 16px 20px;color:var(--gray);font-size:14.5px;line-height:1.8}
.method .src-list{font-family:var(--mono);font-size:11.5px;color:var(--gray-dim);line-height:2}
@media(max-width:900px){.method{padding:60px 24px 80px}}

/* ---- FAQ (reuse across tools) ---- */
.faq-item{border-bottom:1px solid var(--border);padding:20px 0}
.faq-q{font-family:var(--body);font-weight:600;font-size:15px;color:var(--white);cursor:crosshair;display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq-a{font-size:14px;color:var(--gray);margin-top:12px;line-height:1.75;display:none}
.faq-item.open .faq-a{display:block}
.faq-item.open .faq-q .plus{transform:rotate(45deg)}
.faq-q .plus{font-family:var(--mono);color:var(--cyan);transition:transform 0.2s;font-size:18px}

/* ---- HUB (tools/index.html) cards ---- */
.tool-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1px;background:var(--border);border:1px solid var(--border)}
.tool-card{background:var(--surface);padding:32px 28px;text-decoration:none;display:flex;flex-direction:column;transition:background 0.2s}
.tool-card:hover{background:var(--surface-2)}
.tool-card .num{font-family:var(--mono);font-size:10px;color:var(--cyan);letter-spacing:0.1em;margin-bottom:14px}
.tool-card h3{font-size:22px;margin-bottom:10px;line-height:1.15}
.tool-card p{font-size:13.5px;line-height:1.65;flex:1;margin-bottom:16px}
.tool-card .go{font-family:var(--mono);font-size:10px;letter-spacing:0.1em;text-transform:uppercase;color:var(--cyan);display:flex;align-items:center;gap:8px}
.tool-card.soon{opacity:0.5;cursor:default;pointer-events:none}
.tool-card.soon .go{color:var(--gray-dim)}

/* ---- misc ---- */
.skip-link{position:absolute;left:-9999px;top:0;background:var(--cyan);color:#000;padding:10px 16px;z-index:1000;font-family:var(--mono);font-size:12px}
.skip-link:focus{left:10px;top:10px}
.scroll-progress{position:fixed;top:0;left:0;height:2px;background:var(--cyan);z-index:199;width:0%;transition:width 0.1s}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}

@media (prefers-reduced-motion: reduce){
  *{animation-duration:0.01ms!important;animation-iteration-count:1!important;transition-duration:0.01ms!important;scroll-behavior:auto!important}
}

/* ---- PRINT (branded PDF-style export) ---- */
@media print{
  nav,footer,.btn-row,.safety-banner ~ .bridge,.bridge,.scroll-progress,.no-print{display:none!important}
  body{background:#fff;color:#111}
  .tool-body{grid-template-columns:1fr;padding:0}
  .panel{border:1px solid #ccc;background:#fafafa}
  .stat-value,.tag,.tool-hero h1 em{color:#000!important}
  a{text-decoration:none;color:#111}
}

/* ---- Worked example ----------------------------------------------------
   Every one of these tools computes in the browser, which means an AI crawler
   -- none of which run JavaScript -- sees an empty form and no numbers at all.
   The worked example is the page's static answer to that: the tool's own
   default inputs, run through the same hydra-engine.js the page loads, with
   the results written into the HTML. A reader gets a sanity check before
   touching a field; an answer engine gets something concrete to quote.
   Regenerate these numbers whenever the engine's model or defaults change. */
.worked{max-width:900px;margin:0 auto;padding:70px 6vw 0}
.worked h2{font-size:clamp(24px,3vw,34px);margin-bottom:14px}
.worked > p{font-size:14.5px;line-height:1.85;color:var(--gray);margin-bottom:20px}
.worked .worked-io{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--border);border:1px solid var(--border);margin-bottom:8px}
.worked .worked-col{background:var(--bg);padding:22px 24px}
.worked .worked-col h3{
  font-family:var(--mono);font-size:10px;letter-spacing:0.15em;text-transform:uppercase;
  color:var(--cyan);margin:0 0 14px
}
.worked .worked-col.out h3{color:var(--green)}
.worked dl{display:grid;grid-template-columns:auto 1fr;gap:7px 18px;margin:0;font-size:13.5px}
.worked dt{font-family:var(--mono);font-size:11.5px;color:var(--gray-dim);white-space:nowrap}
.worked dd{margin:0;color:var(--white);line-height:1.6}
.worked dd .unit{color:var(--gray-dim);font-size:12px}
.worked .headline{
  font-family:var(--mono);font-size:clamp(15px,2vw,19px);line-height:1.6;
  color:var(--white);background:var(--surface);border-left:3px solid var(--green);
  padding:20px 24px;margin:8px 0 0
}
.worked .headline b{color:var(--green);font-weight:400}
.worked .worked-note{font-size:13px;color:var(--gray-dim);line-height:1.8;margin-top:14px}
@media(max-width:900px){
  .worked{padding:50px 24px 0}
  .worked .worked-io{grid-template-columns:1fr}
}
@media print{.worked .worked-io{border-color:#ccc}.worked dd{color:#000}}