/* =============================================================
   Project Cost System — site.css
   ONE stylesheet. Edit content in the .html files, not here.
   Design system: "the cost sheet"
     paper  #F2F5F4   cool paper, not cream
     ink    #0F1720   near-black blue
     rule   #DCE2E0   hairlines / grid
     teal   #0B5D5D   ACTUAL (WIP, money spent, things that happened)
     ochre  #A9761B   FORECAST (ETC, things that haven't happened yet)
     red    #B3352E   variance / warning (use sparingly)
   Type: IBM Plex superfamily in three registers —
     Condensed (headlines) / Sans (body) / Mono (labels + all numbers)
   ============================================================= */

:root{
  --paper:#F2F5F4;
  --paper-2:#FFFFFF;
  --ink:#0F1720;
  --ink-2:#43525C;
  --rule:#DCE2E0;
  --teal:#0B5D5D;
  --teal-tint:#E3EDEB;
  --ochre:#A9761B;
  --ochre-tint:#F6EEDD;
  --red:#B3352E;

  --gut: clamp(20px, 5vw, 64px);
  --max: 1180px;
  --r: 2px;                 /* radius: almost none. This is a document. */
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:"IBM Plex Sans",system-ui,sans-serif;
  font-size:17px;
  line-height:1.62;
  -webkit-font-smoothing:antialiased;
}
img,video,svg{max-width:100%;display:block}
a{color:var(--teal);text-decoration:none;border-bottom:1px solid rgba(11,93,93,.28)}
a:hover{border-bottom-color:var(--teal)}
:focus-visible{outline:2px solid var(--ochre);outline-offset:3px}

/* ---------- type ---------- */
h1,h2,h3,h4{
  font-family:"IBM Plex Sans Condensed","IBM Plex Sans",sans-serif;
  font-weight:600;line-height:1.12;letter-spacing:-.01em;margin:0 0 .5em;
}
h1{font-size:clamp(34px,5.2vw,60px);font-weight:700}
h2{font-size:clamp(26px,3.2vw,38px)}
h3{font-size:21px}
p{margin:0 0 1.1em;max-width:68ch}
.lede{font-size:clamp(19px,2.1vw,23px);line-height:1.5;color:var(--ink-2);max-width:60ch}
.mono,.label,.eyebrow,.num,td.num,th{font-family:"IBM Plex Mono",ui-monospace,monospace;font-variant-numeric:tabular-nums}
.eyebrow{
  font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-2);
  display:flex;align-items:center;gap:10px;margin-bottom:18px;
}
.eyebrow::after{content:"";flex:1;height:1px;background:var(--rule)}
.small{font-size:14.5px;color:var(--ink-2)}

/* ---------- layout ---------- */
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gut)}
section{padding:clamp(48px,7vw,88px) 0;border-top:1px solid var(--rule)}
section.flush{border-top:none}
.cols{display:grid;gap:clamp(24px,4vw,56px)}
@media(min-width:860px){
  .cols-2{grid-template-columns:1fr 1fr}
  .cols-3{grid-template-columns:repeat(3,1fr)}
  .cols-sidebar{grid-template-columns:minmax(0,1fr) 320px}
}

/* ---------- header ---------- */
header.top{
  position:sticky;top:0;z-index:50;background:rgba(242,245,244,.92);
  backdrop-filter:blur(6px);border-bottom:1px solid var(--rule);
}
.top .wrap{display:flex;align-items:center;gap:18px;height:62px}
.brand{display:flex;align-items:center;gap:10px;border:0;color:var(--ink);font-weight:600;
  font-family:"IBM Plex Sans Condensed",sans-serif;letter-spacing:.01em;font-size:18px}
.brand .mark{width:22px;height:22px;flex:none}
nav.main{margin-left:auto;display:flex;align-items:center;gap:6px;flex-wrap:wrap}
nav.main a{
  border:0;color:var(--ink-2);font-size:14px;padding:7px 10px;border-radius:var(--r);
  font-family:"IBM Plex Sans Condensed",sans-serif;letter-spacing:.02em;
}
nav.main a:hover{color:var(--ink);background:var(--teal-tint)}
nav.main a[aria-current="page"]{color:var(--ink);box-shadow:inset 0 -2px 0 var(--teal)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;border:1px solid var(--teal);
  background:var(--teal);color:#fff;padding:11px 18px;border-radius:var(--r);
  font-family:"IBM Plex Sans Condensed",sans-serif;font-size:15.5px;letter-spacing:.02em;
  cursor:pointer;transition:transform .12s ease, background .12s ease;
}
.btn:hover{background:#0a4f4f;transform:translateY(-1px)}
.btn.ghost{background:transparent;color:var(--ink);border-color:var(--rule)}
.btn.ghost:hover{background:var(--paper-2);border-color:var(--ink-2)}
.btn.sm{padding:7px 12px;font-size:14px}
.btns{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}

/* ---------- beta strip ---------- */
.beta{
  background:var(--ochre-tint);border-bottom:1px solid #E6D6B4;
  font-size:14px;padding:9px 0;color:#6B4C11;
}
.beta .wrap{display:flex;gap:12px;align-items:baseline;flex-wrap:wrap}
.beta b{font-family:"IBM Plex Mono",monospace;font-size:12px;letter-spacing:.12em;text-transform:uppercase}
.beta a{color:#6B4C11;border-bottom-color:rgba(107,76,17,.4)}

/* ---------- hero ---------- */
.hero{padding:clamp(44px,6vw,76px) 0 clamp(40px,6vw,70px)}
.hero .grid{display:grid;gap:clamp(28px,4vw,54px);align-items:center}
@media(min-width:960px){.hero .grid{grid-template-columns:1.02fr .98fr}}
.definition{
  border-left:3px solid var(--teal);padding:2px 0 2px 18px;margin:26px 0 0;
  font-size:17px;color:var(--ink-2);max-width:60ch;
}

/* ---------- curve panel (the signature) ---------- */
.panel{
  background:var(--paper-2);border:1px solid var(--rule);border-radius:var(--r);
  box-shadow:0 1px 0 rgba(15,23,32,.04), 0 18px 40px -32px rgba(15,23,32,.35);
}
.panel .panel-head{
  display:flex;justify-content:space-between;align-items:center;gap:12px;
  padding:10px 14px;border-bottom:1px solid var(--rule);
  font-family:"IBM Plex Mono",monospace;font-size:11px;letter-spacing:.1em;
  text-transform:uppercase;color:var(--ink-2);
}
.panel .panel-body{padding:14px}
.legend{display:flex;gap:16px;flex-wrap:wrap;font-family:"IBM Plex Mono",monospace;
  font-size:11.5px;color:var(--ink-2);padding:2px 14px 12px}
.legend span{display:flex;align-items:center;gap:6px}
.swatch{width:14px;height:3px;border-radius:2px;display:inline-block}

/* curve draw-on */
.curve-line{stroke-dasharray:1400;stroke-dashoffset:1400;animation:draw 1.5s ease forwards}
.curve-line.d2{animation-delay:.25s}
.curve-line.d3{animation-delay:.5s}
@keyframes draw{to{stroke-dashoffset:0}}
@media(prefers-reduced-motion:reduce){
  .curve-line{animation:none;stroke-dashoffset:0}
  html{scroll-behavior:auto}
}

/* ---------- cards / lists ---------- */
.card{background:var(--paper-2);border:1px solid var(--rule);border-radius:var(--r);padding:22px}
.card h3{margin-bottom:6px}
.card p:last-child{margin-bottom:0}
.tick{list-style:none;padding:0;margin:0}
.tick li{position:relative;padding:12px 0 12px 26px;border-bottom:1px solid var(--rule);max-width:72ch}
.tick li:last-child{border-bottom:0}
.tick li::before{
  content:"";position:absolute;left:0;top:20px;width:9px;height:9px;
  border:1px solid var(--teal);background:var(--teal-tint);border-radius:1px;
}
.tick li b{font-weight:600}

/* ---------- tables (the stakeholder map, specs) ---------- */
.sheet{width:100%;border-collapse:collapse;font-size:15.5px;background:var(--paper-2);
  border:1px solid var(--rule);}
.sheet th{
  text-align:left;font-size:11px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--ink-2);font-weight:500;padding:11px 14px;border-bottom:1px solid var(--rule);
  background:var(--paper);position:sticky;top:62px;
}
.sheet td{padding:13px 14px;border-bottom:1px solid var(--rule);vertical-align:top}
.sheet tr:last-child td{border-bottom:0}
.sheet tbody tr:hover{background:var(--teal-tint)}
.sheet td:first-child{font-family:"IBM Plex Sans Condensed",sans-serif;font-weight:600;white-space:nowrap}
.todo{color:var(--ochre);font-family:"IBM Plex Mono",monospace;font-size:12.5px}
.scroll-x{overflow-x:auto}

/* ---------- steps (how it works — a real sequence, so it gets numbers) ---------- */
.step{display:grid;gap:22px;padding:34px 0;border-top:1px solid var(--rule)}
@media(min-width:900px){.step{grid-template-columns:92px minmax(0,1fr)}}
.step-no{font-family:"IBM Plex Mono",monospace;font-size:13px;color:var(--teal);letter-spacing:.1em;padding-top:5px}
.step h3{margin-bottom:8px}
.step ul{margin:0 0 16px;padding-left:20px;color:var(--ink-2)}
.step ul li{margin-bottom:5px}

/* ---------- media slots (drop your snips + movies here) ---------- */
figure.snip{margin:18px 0 0;border:1px solid var(--rule);border-radius:var(--r);background:var(--paper-2);overflow:hidden}
figure.snip img,figure.snip video{width:100%;height:auto;background:#fff;border-bottom:1px solid var(--rule)}
figure.snip figcaption{padding:9px 12px;font-size:13px;color:var(--ink-2);
  font-family:"IBM Plex Mono",monospace;display:flex;gap:10px;align-items:baseline}
figure.snip figcaption b{color:var(--ink);font-weight:500}
.slot{
  display:flex;flex-direction:column;justify-content:center;align-items:center;gap:8px;
  min-height:190px;padding:24px;text-align:center;
  background:repeating-linear-gradient(-45deg,#fff,#fff 9px,#F7F9F8 9px,#F7F9F8 18px);
  border-bottom:1px dashed var(--rule);color:var(--ink-2);
}
.slot .kind{font-family:"IBM Plex Mono",monospace;font-size:11px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--ochre)}
.slot .file{font-family:"IBM Plex Mono",monospace;font-size:13px;color:var(--ink);
  background:var(--ochre-tint);padding:3px 8px;border-radius:var(--r)}
.slot .what{font-size:14.5px;max-width:46ch}

/* ---------- FAQ ---------- */
.faq-group{border-top:1px solid var(--rule);padding-top:8px;margin-top:34px}
details.qa{border-bottom:1px solid var(--rule);padding:4px 0}
details.qa summary{
  cursor:pointer;list-style:none;padding:16px 30px 16px 0;position:relative;
  font-family:"IBM Plex Sans Condensed",sans-serif;font-size:19px;font-weight:600;
}
details.qa summary::-webkit-details-marker{display:none}
details.qa summary::after{
  content:"+";position:absolute;right:4px;top:14px;font-family:"IBM Plex Mono",monospace;
  color:var(--teal);font-size:20px;
}
details.qa[open] summary::after{content:"–"}
details.qa .a{padding:0 0 18px;color:var(--ink-2)}
details.qa .a p:last-child{margin-bottom:0}

/* ---------- quote / concept ---------- */
blockquote.pull{
  margin:0;padding:26px 28px;background:var(--paper-2);border:1px solid var(--rule);
  border-left:3px solid var(--ochre);border-radius:var(--r);
  font-family:"IBM Plex Sans Condensed",sans-serif;font-size:clamp(20px,2.4vw,27px);
  line-height:1.35;color:var(--ink);
}
blockquote.pull cite{display:block;margin-top:14px;font-family:"IBM Plex Mono",monospace;
  font-size:12px;font-style:normal;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-2)}

/* ---------- form ---------- */
.field{margin-bottom:16px;max-width:520px}
.field label{display:block;font-family:"IBM Plex Mono",monospace;font-size:11.5px;
  letter-spacing:.12em;text-transform:uppercase;color:var(--ink-2);margin-bottom:6px}
.field input,.field textarea,.field select{
  width:100%;padding:11px 12px;border:1px solid var(--rule);border-radius:var(--r);
  background:var(--paper-2);font:inherit;font-size:16px;color:var(--ink);
}
.field textarea{min-height:130px;resize:vertical}
.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--teal);outline:none;
  box-shadow:0 0 0 3px var(--teal-tint)}

/* ---------- footer ---------- */
footer.bottom{border-top:1px solid var(--rule);background:var(--paper-2);padding:44px 0 60px}
footer.bottom .wrap{display:grid;gap:26px}
@media(min-width:820px){footer.bottom .wrap{grid-template-columns:1.4fr 1fr 1fr}}
footer.bottom h4{font-size:12px;font-family:"IBM Plex Mono",monospace;letter-spacing:.14em;
  text-transform:uppercase;color:var(--ink-2);margin-bottom:12px}
footer.bottom ul{list-style:none;padding:0;margin:0}
footer.bottom li{margin-bottom:8px}
footer.bottom a{border:0;color:var(--ink-2);font-size:15px}
footer.bottom a:hover{color:var(--teal)}
.colophon{font-size:13.5px;color:var(--ink-2);max-width:42ch}

/* --- Beta banner dismiss --- */
.beta { position: relative; }
.beta .wrap { padding-right: 38px; }
.beta-close {
  position: absolute;
  top: 50%;
  right: 12px;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  padding: 0;
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: inherit;
  opacity: .65;
  font-size: 17px;
  line-height: 1;
  cursor: pointer;
}
.beta-close:hover, .beta-close:focus-visible { opacity: 1; background: rgba(0,0,0,.12); }
@media (max-width: 640px) {
  .beta .wrap { padding-right: 34px; }
  .beta-close { right: 8px; }
}