/* ==========================================================================
   Call for Demos — RFM Safety Failure Repository
   A joint initiative of the Physical AI Safety Institute and MIT FutureTech.
   This page is deliberately standalone: it shares no styles with the
   SPAIS workshop site so it can be shared and read on its own terms.
   ========================================================================== */

:root{
  --paper:#FFFFFF;
  --wash:#F6F8FA;
  --wash-2:#EFF3F6;

  --ink:#0E1317;
  --ink-2:#333C45;
  --muted:#5F6B76;
  --faint:#8B96A1;

  --line:#E1E6EB;
  --line-2:#D5DCE3;
  --line-soft:#EDF1F4;

  /* MIT FutureTech */
  --crimson:#9A202F;
  --crimson-deep:#7C1926;
  --crimson-wash:#9A202F0F;

  /* PAISI mark gradient */
  --paisi-blue:#5B9FD5;
  --paisi-teal:#6EBEAA;
  --paisi-green:#4A9B5D;

  /* interactive accent */
  --accent:#116C7C;
  --accent-bright:#158193;
  --accent-wash:#116C7C0F;
  --accent-ring:#116C7C26;

  --display:"Newsreader",Georgia,"Times New Roman",serif;
  --paisi-wordmark:"Source Serif 4",Georgia,"Times New Roman",serif;
  --sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif;

  --shadow-sm:0 1px 2px rgba(14,19,23,.05);
  --shadow-md:0 18px 40px -28px rgba(14,19,23,.35);
  --shadow-lg:0 40px 90px -60px rgba(14,19,23,.5);
}

*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.65;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
a{color:inherit}
img{display:block}

.shell{max-width:1120px;margin:0 auto;padding:0 40px}
@media(max-width:680px){.shell{padding:0 20px}}

.narrow{max-width:780px;margin:0 auto}

/* the partnership hairline: PAISI gradient running into MIT crimson */
.topline{
  height:3px;
  background:linear-gradient(90deg,var(--paisi-blue),var(--paisi-teal) 26%,var(--paisi-green) 48%,#7A4A4A 72%,var(--crimson));
}

/* ============ TOP BAR ============ */
.bar{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.88);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line-soft);
}
.bar .shell{display:flex;align-items:center;justify-content:space-between;gap:20px;height:68px}
.bar-marks{display:flex;align-items:center;gap:14px;min-width:0}
/* fade colour, not opacity: an opacity transition promotes a compositor layer
   and snaps the lockup sideways because it sits on a fractional x */
.bar-marks a{text-decoration:none;flex-shrink:0;color:#1A1A1A;transition:color .18s}
.bar-marks a:hover{color:#6B747C}
.bar-marks .paisi svg,.bar-marks .ft{
  transition:opacity .18s;transform:translateZ(0);backface-visibility:hidden;
}
.bar-marks a:hover svg,.bar-marks a:hover .ft{opacity:.62}
.bar-marks a:focus-visible{outline:2px solid var(--accent);outline-offset:4px;border-radius:3px}
.bar-marks .ft-link{display:flex;align-items:center}
.bar-marks .paisi{display:flex;align-items:center;gap:10px}
.bar-marks .paisi svg{width:26px;height:26px;flex-shrink:0}
/* the wordmark is set exactly as it is on paisi.ai; the line-height matches the
   mark so the link box stays on whole pixels — on a fractional offset the
   hover opacity transition promotes a layer and the lockup snaps a pixel */
.bar-marks .paisi .wordmark{
  font-family:var(--paisi-wordmark);font-size:18px;font-weight:400;letter-spacing:-.01em;
  line-height:26px;color:inherit;white-space:nowrap;
}
.bar-marks .paisi .wordmark strong{font-weight:600}
.bar-marks .x{
  flex-shrink:0;font-size:13px;font-weight:500;line-height:1;color:var(--faint);
}
.bar-marks .ft{height:16px;width:auto;flex-shrink:0}
@media(max-width:620px){.bar-marks .paisi .wordmark{display:none}}

.bar-link{
  display:inline-flex;align-items:center;gap:7px;flex-shrink:0;
  font-size:11px;font-weight:650;letter-spacing:.13em;text-transform:uppercase;
  color:var(--muted);text-decoration:none;transition:color .2s;
}
.bar-link:hover{color:var(--accent)}

/* thin scroll progress under the bar */
.progress{position:absolute;left:0;bottom:-1px;height:2px;width:0;
  background:linear-gradient(90deg,var(--accent),var(--paisi-teal));transition:width .15s linear}

/* ============ EXAMPLE EPISODE ============ */
.demo{position:relative;overflow:hidden;padding:84px 0 92px}
.demo::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(64% 86% at 18% -14%, rgba(110,190,170,.15), transparent 62%),
    radial-gradient(46% 68% at 92% 0%, rgba(154,32,47,.06), transparent 68%);
}
.demo .shell{position:relative;z-index:2}
@media(max-width:900px){.demo{padding:48px 0 56px}}

.demo-grid{
  display:grid;grid-template-columns:minmax(0,1.105fr) minmax(0,1fr);
  gap:40px;align-items:center;
}
@media(max-width:900px){
  .demo-grid{grid-template-columns:1fr;gap:34px}
  .demo-stage{order:-1;max-width:none}
}

.kicker{
  display:block;font-size:10px;font-weight:650;letter-spacing:.2em;text-transform:uppercase;
  color:var(--accent);margin-top:26px;
}
.kicker .lead{display:block}
.kicker .orgs{display:block;margin-top:5px}
/* brand names keep their own casing inside the tracked eyebrow */
.kicker a{
  text-transform:none;letter-spacing:.005em;font-size:12.5px;font-weight:650;
  color:var(--accent);text-decoration:none;
  border-bottom:1px solid #116C7C3D;transition:color .18s,border-color .18s;
}
.kicker a:hover{color:var(--accent-bright);border-color:var(--accent-bright)}
.demo-copy h1{
  font-family:var(--display);font-size:clamp(38px,4.7vw,55px);
  font-weight:400;letter-spacing:-.02em;line-height:1.08;color:var(--ink);
}
/* the subtitle carries the PAISI mark's blue-to-green run */
.demo-copy h1 em{
  font-style:italic;color:#2E8C8A;
  background:linear-gradient(96deg,#3C86BE,#3D9E94 52%,#4A9B5D);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
}

.why{margin-top:22px;font-size:16px;line-height:1.75;color:var(--ink-2)}
.why b{font-weight:600;color:var(--ink)}
.scope{margin-top:44px;font-size:13.5px;font-style:italic;line-height:1.6;color:var(--muted)}

/* the three tags walk the PAISI gradient: blue, teal, green */
.cite{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 12px 5px 5px;border-radius:999px;border:1px solid;
  font-size:13px;font-weight:550;line-height:1.35;
}
.chip i{
  font-style:normal;font-size:9.5px;font-weight:700;letter-spacing:.13em;text-transform:uppercase;
  padding:3px 8px;border-radius:999px;color:#fff;
}
.chip.task {color:#1B5C8A;border-color:#5B9FD54D;background:#5B9FD514}
.chip.task i {background:#3C86BE}
.chip.rfm  {color:#0E6B75;border-color:#6EBEAA5C;background:#6EBEAA1A}
.chip.rfm  i{background:#3D9E94}
.chip.robot{color:#2C6B44;border-color:#4A9B5D52;background:#4A9B5D16}
.chip.robot i{background:#4A9B5D}

.credit{margin-top:14px;font-size:13px;line-height:1.6;color:var(--faint)}

.steps{list-style:none;margin-top:34px;display:flex;flex-direction:column;gap:17px}
.steps li{display:flex;gap:13px}
.steps .n{
  flex-shrink:0;width:23px;height:23px;display:grid;place-items:center;margin-top:1px;
  border:1px solid var(--line-2);border-radius:50%;background:var(--paper);
  font-size:10px;font-weight:700;color:var(--accent);
}
.steps h3{font-size:14.5px;font-weight:650;letter-spacing:-.005em;color:var(--ink)}
.steps p{margin-top:2px;font-size:13.5px;line-height:1.6;color:var(--muted)}
.steps a{color:var(--accent);text-decoration:none;border-bottom:1px solid #116C7C40;transition:border-color .18s}
.steps a:hover{border-color:var(--accent)}

/* video, framed like a clip in a viewer */
.demo-stage{max-width:none;margin-left:0}
.frame{
  border:1px solid var(--line);border-radius:14px;overflow:hidden;background:var(--paper);
  box-shadow:var(--shadow-lg);
}
.chrome{
  display:flex;align-items:center;gap:12px;padding:10px 14px;
  border-bottom:1px solid var(--line-soft);background:var(--wash);
}
.chrome .dots{display:flex;gap:6px;flex-shrink:0}
.chrome .dots i{width:9px;height:9px;border-radius:50%;background:#D8DFE5}
.chrome .fname{
  font-size:11.5px;font-weight:500;color:var(--muted);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.chrome .live{
  margin-left:auto;flex-shrink:0;display:inline-flex;align-items:center;gap:6px;
  font-size:9.5px;font-weight:650;letter-spacing:.14em;text-transform:uppercase;color:var(--crimson);
}
.chrome .live::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--crimson);
  animation:pulse 2.4s ease-in-out infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.25}}
/* the source is 16:9; centre-crop it into a portrait frame that sits level with the copy */
.clip{position:relative;width:100%;padding-top:128%;background:#0E1317}
.clip video{
  position:absolute;top:0;left:0;width:100%;height:100%;display:block;
  object-fit:cover;object-position:center;
}

@media(prefers-reduced-motion:reduce){.chrome .live::before{animation:none}}

/* ============ FORM SHEET ============ */
.sheet{background:var(--wash);border-top:1px solid var(--line);padding:76px 0 96px}
@media(max-width:680px){.sheet{padding:48px 0 64px}}

.sheet-head{max-width:780px;margin:0 auto 26px}
.sheet-head h2{
  font-family:var(--display);font-size:clamp(26px,3.4vw,34px);
  font-weight:400;letter-spacing:-.015em;line-height:1.2;color:var(--ink);
}
.sheet-head p{margin-top:10px;font-size:15px;color:var(--muted);max-width:62ch}

.card{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:14px;
  box-shadow:var(--shadow-md);
  overflow:hidden;
}
.card-top{height:3px;background:linear-gradient(90deg,var(--paisi-blue),var(--paisi-teal) 40%,var(--paisi-green) 62%,var(--crimson))}

/* ---- sections ---- */
.sec{padding:34px 42px;border-bottom:1px solid var(--line-soft)}
.sec:last-of-type{border-bottom:none}
@media(max-width:680px){.sec{padding:26px 22px}}

.sec-head{display:flex;align-items:baseline;gap:13px;margin-bottom:24px}
.sec-head .no{
  font-family:var(--sans);font-size:10.5px;font-weight:700;letter-spacing:.1em;
  color:var(--accent);background:var(--accent-wash);
  border-radius:5px;padding:3px 7px;flex-shrink:0;
}
.sec-head h3{font-size:17px;font-weight:650;letter-spacing:-.005em;color:var(--ink)}
.sec-head .note{margin-left:auto;font-size:11.5px;color:var(--faint);white-space:nowrap}

/* ---- fields ---- */
.field{margin-bottom:26px}
.field:last-child{margin-bottom:0}
.field > label:not(.drop):not(.opt-row),.field .qlabel{
  display:block;font-size:14px;font-weight:600;line-height:1.5;color:var(--ink);margin-bottom:5px;
}
.req{color:var(--crimson);margin-left:3px;font-weight:700}
.opt{
  margin-left:7px;font-size:10px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;
  color:var(--faint);
}
.help{font-size:13px;line-height:1.55;color:var(--muted);margin:-1px 0 10px}

.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:20px}
@media(max-width:620px){.grid-2{grid-template-columns:1fr}}

input[type=text],input[type=email],input[type=url],textarea,select{
  width:100%;font-family:var(--sans);font-size:15px;line-height:1.5;color:var(--ink);
  background:var(--paper);border:1px solid var(--line-2);border-radius:8px;
  padding:11px 13px;transition:border-color .16s,box-shadow .16s,background .16s;
  appearance:none;
}
input[type=text]::placeholder,input[type=email]::placeholder,input[type=url]::placeholder,textarea::placeholder{color:#A7B1BB}
input[type=text]:hover,input[type=email]:hover,input[type=url]:hover,textarea:hover,select:hover{border-color:#BFC9D2}
input[type=text]:focus,input[type=email]:focus,input[type=url]:focus,textarea:focus,select:focus{
  outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-ring);
}
textarea{resize:vertical;min-height:112px}

select{
  padding-right:38px;cursor:pointer;
  background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%235F6B76' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 13px center;
}
select:invalid,select.placeholder{color:#A7B1BB}

/* ---- option rows (checkbox / radio) ---- */
.options{display:flex;flex-direction:column;gap:8px}
.options.tree .kids{
  display:flex;flex-direction:column;gap:6px;
  margin:0 0 4px 22px;padding-left:12px;border-left:2px solid var(--line-soft);
}
.options.tree .kids .opt-row{padding:9px 12px}
.options.tree .opt-row .txt b{font-variant-numeric:tabular-nums;margin-right:4px}
.opt-row{
  display:flex;align-items:flex-start;gap:11px;
  padding:11px 14px;border:1px solid var(--line-2);border-radius:8px;background:var(--paper);
  cursor:pointer;transition:border-color .16s,background .16s,box-shadow .16s;
}
.opt-row:hover{background:var(--wash);border-color:#BFC9D2}
.opt-row input{
  appearance:none;flex-shrink:0;width:17px;height:17px;margin-top:2px;
  border:1.5px solid #BFC9D2;background:var(--paper);
  transition:border-color .16s,background .16s;cursor:pointer;
}
.opt-row input[type=checkbox]{border-radius:5px}
.opt-row input[type=radio]{border-radius:50%}
.opt-row input:checked{border-color:var(--accent);background:var(--accent)}
.opt-row input[type=checkbox]:checked{
  background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='11' height='9' viewBox='0 0 11 9' fill='none'%3E%3Cpath d='M1 4.5L4 7.5L10 1.5' stroke='white' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:center;
}
.opt-row input[type=radio]:checked{box-shadow:inset 0 0 0 3.5px var(--paper)}
.opt-row input:focus-visible{outline:none;box-shadow:0 0 0 3px var(--accent-ring)}
.opt-row.on{border-color:var(--accent);background:var(--accent-wash)}
.opt-row .txt{font-size:14.5px;line-height:1.5;color:var(--ink-2)}
.opt-row.on .txt{color:var(--ink)}
.opt-row .txt b{font-weight:600;color:var(--ink)}
.opt-row .txt a{color:var(--accent);text-decoration:none;border-bottom:1px solid #116C7C40;transition:border-color .18s}
.opt-row .txt a:hover{border-color:var(--accent)}
.opt-row .txt .sub{display:block;margin-top:2px;font-size:13px;color:var(--muted)}

/* "Other" write-in that activates with its checkbox */
.other-row{display:flex;align-items:center;gap:11px;padding:6px 0 0}
.other-row input[type=text]{flex:1}
.other-row input[type=text]:disabled{background:var(--wash);color:var(--faint);cursor:not-allowed;border-color:var(--line)}
/* the dropdown version stays out of the way until "Other" is chosen */
.other-row.on-select{display:none;padding-top:9px}
.other-row.on-select.show{display:flex;animation:reveal .22s ease-out}

/* ---- file upload ---- */
.drop{
  position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:6px;padding:34px 24px;text-align:center;cursor:pointer;
  border:1.5px dashed var(--line-2);border-radius:10px;background:var(--wash);
  transition:border-color .18s,background .18s;
}
.drop:hover,.drop.over{border-color:var(--accent);background:var(--accent-wash)}
.drop input[type=file]{position:absolute;inset:0;opacity:0;cursor:pointer}
.drop .ico{
  width:38px;height:38px;display:grid;place-items:center;margin-bottom:4px;
  border-radius:9px;background:var(--paper);border:1px solid var(--line);color:var(--accent);
  box-shadow:var(--shadow-sm);
}
.drop .t{font-size:14.5px;font-weight:600;color:var(--ink)}
.drop .t u{color:var(--accent);text-underline-offset:3px}
.drop .s{font-size:12.5px;color:var(--muted)}

.filelist{display:flex;flex-direction:column;gap:7px;margin-top:11px}
.filelist:empty{display:none}
.file{
  display:flex;align-items:center;gap:11px;padding:9px 12px;
  border:1px solid var(--line);border-radius:8px;background:var(--paper);
}
.file .fi{width:26px;height:26px;display:grid;place-items:center;border-radius:6px;
  background:var(--accent-wash);color:var(--accent);flex-shrink:0}
.file .fn{font-size:13.5px;font-weight:500;color:var(--ink);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.file .fs{margin-left:auto;font-size:12px;color:var(--faint);white-space:nowrap;flex-shrink:0}

/* ---- likert ---- */
.likert{margin-top:4px}
.likert-scale{display:grid;grid-template-columns:repeat(11,1fr);gap:6px}
@media(max-width:620px){.likert-scale{grid-template-columns:repeat(6,1fr)}}
.likert-scale label{
  display:grid;place-items:center;height:42px;cursor:pointer;
  border:1px solid var(--line-2);border-radius:8px;background:var(--paper);
  font-size:14px;font-weight:600;color:var(--ink-2);
  transition:border-color .14s,background .14s,color .14s,transform .14s;
}
.likert-scale label:hover{border-color:var(--accent);color:var(--accent)}
.likert-scale input{position:absolute;opacity:0;pointer-events:none}
.likert-scale label.on{
  background:var(--accent);border-color:var(--accent);color:#fff;transform:translateY(-1px);
}
.likert-ends{display:flex;justify-content:space-between;margin-top:9px;
  font-size:11.5px;font-weight:500;color:var(--faint)}

/* ---- conditional blocks ---- */
.conditional{
  margin-top:18px;padding-left:18px;border-left:2px solid var(--accent-wash);
  display:none;
}
.conditional.show{display:block;animation:reveal .22s ease-out}
@keyframes reveal{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

/* ---- consent + submit ---- */
.consent{padding:28px 42px;background:var(--wash);border-top:1px solid var(--line-soft);display:flex;flex-direction:column;gap:10px}
@media(max-width:680px){.consent{padding:22px}}

.submit-bar{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  padding:26px 42px 30px;
}
@media(max-width:680px){.submit-bar{padding:22px}}
.submit-note{font-size:12.5px;line-height:1.6;color:var(--muted);max-width:62ch}
.submit-note .nobr{white-space:nowrap}
.form-error{
  display:none;flex:1 0 100%;margin:0 0 4px;
  font-size:13.5px;line-height:1.45;color:#9b2c2c;
}
.form-error.show{display:block}
.submit-hint{flex:1 0 100%;margin:0 0 4px;font-size:13px;line-height:1.45;color:var(--muted)}
.submit-hint[hidden]{display:none}
.btn{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--sans);font-size:14px;font-weight:650;letter-spacing:.01em;
  padding:13px 26px;border:1px solid var(--ink);border-radius:8px;
  background:var(--ink);color:#fff;text-decoration:none;cursor:pointer;
  transition:background .18s,border-color .18s,transform .18s,box-shadow .18s;
}
.btn:hover{background:#000;transform:translateY(-1px);box-shadow:0 10px 24px -14px rgba(14,19,23,.7)}
.btn:active{transform:none}
.btn:focus-visible{outline:none;box-shadow:0 0 0 3px var(--accent-ring)}
.btn:disabled,.btn:disabled:hover{
  opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;background:var(--ink);
}
.btn.is-busy:disabled,.btn.is-busy:disabled:hover{cursor:wait}

/* ---- success state ---- */
.done{display:none;padding:64px 42px;text-align:center}
.done.show{display:block}
.done .ico{
  width:56px;height:56px;margin:0 auto 20px;display:grid;place-items:center;border-radius:50%;
  background:var(--accent-wash);color:var(--accent);
}
.done h3{font-family:var(--display);font-size:30px;font-weight:400;letter-spacing:-.015em;color:var(--ink)}
.done p{margin:12px auto 0;max-width:46ch;font-size:15px;color:var(--muted)}

/* ============ FOOTER ============ */
.foot{border-top:1px solid var(--line);padding:46px 0 54px;background:var(--paper)}
.foot .shell{display:flex;align-items:center;justify-content:space-between;gap:22px;flex-wrap:wrap}
.foot .who{display:flex;align-items:center;gap:14px}
.foot .who svg{width:28px;height:28px}
.foot .who .ft{height:15px;width:auto;opacity:.82}
.foot .who .tie{width:1px;height:18px;background:var(--line-2)}
.foot .meta{font-size:12.5px;line-height:1.75;color:var(--faint)}
.foot .meta a{color:var(--muted);text-decoration:none;border-bottom:1px solid var(--line-2);transition:color .18s,border-color .18s}
.foot .meta a:hover{color:var(--accent);border-color:var(--accent)}
@media(max-width:620px){.foot .shell{flex-direction:column;align-items:flex-start}}

/* ---- reveal on scroll ---- */
.rv{opacity:0;transform:translateY(16px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
.rv.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .rv{opacity:1;transform:none;transition:none}
  .conditional.show{animation:none}
}