/* Systems Lab — independent stylesheet. Navy/teal glass, matches Systems Lab mockups. */

:root{
  --navy-950:#050a14;
  --navy-900:#0a1224;
  --navy-800:#0f1b30;
  --navy-700:#16243d;
  --navy-600:#20304c;
  --line:rgba(148,178,214,.16);
  --line-strong:rgba(148,178,214,.3);
  --ink-0:#eaf1fb;
  --ink-1:#c3d1e6;
  --ink-2:#8ea1bd;
  --teal:#5eead4;
  --teal-strong:#2dd4bf;
  --teal-ink:#052420;
  --radius-md:.6rem;
  --radius-lg:.9rem;
  --space-1:.25rem;
  --space-2:.5rem;
  --space-3:.75rem;
  --space-4:1rem;
  --space-5:1.5rem;
  --space-6:2rem;
  --space-8:3rem;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
}

*{box-sizing:border-box;}
[hidden]{display:none!important;}
html{color-scheme:dark;}
body.lab-body{
  margin:0;
  font-family:var(--font);
  background:
    radial-gradient(1100px 620px at 82% -8%, rgba(94,234,212,.09), transparent 60%),
    radial-gradient(900px 500px at 8% 0%, rgba(94,140,234,.08), transparent 55%),
    var(--navy-950);
  color:var(--ink-1);
  line-height:1.5;
  min-height:100vh;
}

.skip-link{
  position:absolute; left:-999px; top:0; background:var(--teal); color:var(--teal-ink);
  padding:.6rem 1rem; z-index:200; border-radius:0 0 .4rem 0; font-weight:600;
}
.skip-link:focus{left:0;}

.sr-only{
  position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden;
  clip:rect(0,0,0,0); white-space:nowrap; border:0;
}

.lab-wrap{max-width:1180px; margin:0 auto; padding:0 var(--space-5);}

/* ---------- Nav ---------- */
.lab-nav{
  position:sticky; top:0; z-index:40;
  background:rgba(6,12,24,.72); backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.lab-nav__inner{display:flex; align-items:center; justify-content:space-between; height:64px;}
.lab-brand{display:flex; align-items:center; gap:.55rem; color:var(--ink-0); text-decoration:none; font-weight:600; letter-spacing:.01em;}
.lab-brand__mark{width:26px; height:26px;}
.lab-nav__links{display:flex; align-items:center; gap:var(--space-5);}
.lab-nav__link{color:var(--ink-1); text-decoration:none; font-size:.92rem;}
.lab-nav__link:hover{color:var(--ink-0);}

/* ---------- Buttons ---------- */
.lab-btn{
  display:inline-flex; align-items:center; gap:.4rem;
  font:inherit; font-size:.92rem; font-weight:600;
  border-radius:.5rem; padding:.65rem 1.1rem; border:1px solid transparent;
  cursor:pointer; text-decoration:none; transition:transform .12s ease, background .15s ease, border-color .15s ease;
}
.lab-btn:disabled{opacity:.45; cursor:not-allowed;}
.lab-btn--primary{background:var(--teal); color:var(--teal-ink); border-color:var(--teal);}
.lab-btn--primary:hover:not(:disabled){background:var(--teal-strong);}
.lab-btn--secondary{background:rgba(94,234,212,.1); color:var(--teal); border-color:rgba(94,234,212,.35);}
.lab-btn--secondary:hover:not(:disabled){background:rgba(94,234,212,.18);}
.lab-btn--ghost{background:transparent; color:var(--ink-1); border-color:var(--line-strong);}
.lab-btn--ghost:hover:not(:disabled){color:var(--ink-0); border-color:var(--ink-2);}

:focus-visible{outline:2px solid var(--teal); outline-offset:2px;}

/* ---------- Main / hero ---------- */
.lab-main{max-width:1180px; margin:0 auto; padding:var(--space-6) var(--space-5) var(--space-8);}
.lab-hero{max-width:760px; margin-bottom:var(--space-6);}
.lab-eyebrow{
  color:var(--teal); font-size:.78rem; font-weight:700; letter-spacing:.18em; text-transform:uppercase;
  margin:0 0 var(--space-2);
}
.lab-hero h1{font-size:clamp(1.6rem,3vw,2.3rem); color:var(--ink-0); margin:0 0 var(--space-3); letter-spacing:-.01em;}
.lab-sample-banner{
  display:inline-block; font-size:.85rem; color:var(--teal); background:rgba(94,234,212,.08);
  border:1px solid rgba(94,234,212,.3); border-radius:999px; padding:.35rem .85rem; margin:0;
}

.lab-section{margin-bottom:var(--space-6);}
.lab-section__title{font-size:1.05rem; color:var(--ink-0); margin:0 0 var(--space-4); font-weight:700;}

/* ---------- Scenario grid ---------- */
.scenario-grid{display:grid; grid-template-columns:repeat(auto-fit,minmax(230px,1fr)); gap:var(--space-4);}
.scenario-card{
  text-align:left; background:var(--navy-800); border:1px solid var(--line); border-radius:var(--radius-lg);
  padding:var(--space-5); color:var(--ink-1); cursor:pointer; transition:border-color .15s ease, background .15s ease, transform .12s ease;
}
.scenario-card:hover{border-color:var(--line-strong); transform:translateY(-1px);}
.scenario-card[aria-pressed="true"]{
  border-color:var(--teal); background:rgba(94,234,212,.07);
  box-shadow:0 0 0 1px rgba(94,234,212,.35) inset;
}
.scenario-card__title{display:block; font-size:1.05rem; font-weight:700; color:var(--ink-0); margin-bottom:.35rem;}
.scenario-card__subtitle{display:block; font-size:.88rem; color:var(--ink-2);}

/* ---------- Stage map ---------- */
.stage-map{margin-bottom:var(--space-5);}
.stage-map__list{
  display:flex; list-style:none; margin:0; padding:0; gap:var(--space-3); flex-wrap:wrap;
}
.stage-map__list li{flex:1 1 180px;}
.stage-btn{
  width:100%; text-align:left; background:var(--navy-800); border:1px solid var(--line);
  border-radius:var(--radius-md); padding:.7rem .9rem; color:var(--ink-2); cursor:pointer;
  font:inherit; display:flex; align-items:center; gap:.6rem;
}
.stage-btn__num{
  display:inline-flex; align-items:center; justify-content:center; width:1.6rem; height:1.6rem;
  border-radius:999px; border:1px solid var(--line-strong); font-size:.78rem; font-weight:700; flex:none;
}
.stage-btn__label{font-size:.85rem; font-weight:600;}
.stage-btn[aria-current="step"]{border-color:var(--teal); color:var(--ink-0); background:rgba(94,234,212,.08);}
.stage-btn[aria-current="step"] .stage-btn__num{background:var(--teal); color:var(--teal-ink); border-color:var(--teal);}
.stage-btn[data-done="true"] .stage-btn__num{background:rgba(94,234,212,.25); border-color:var(--teal);}
.stage-btn:disabled{opacity:.4; cursor:not-allowed;}

/* ---------- Workflow map ---------- */
.workflow-map{
  list-style:none; margin:0; padding:0; display:flex; gap:var(--space-3); flex-wrap:wrap;
}
.workflow-node{
  background:var(--navy-800); border:1px solid var(--line); border-radius:var(--radius-md);
  padding:.75rem .9rem; color:var(--ink-1); font:inherit; font-size:.85rem; cursor:pointer; text-align:left;
  min-width:150px;
}
.workflow-node:hover{border-color:var(--line-strong); color:var(--ink-0);}
.workflow-node__step{display:block; font-size:.72rem; color:var(--teal); letter-spacing:.05em; text-transform:uppercase; margin-bottom:.2rem;}

/* ---------- Panels ---------- */
.step-panel{
  background:var(--navy-800); border:1px solid var(--line); border-radius:var(--radius-lg);
  padding:var(--space-6);
}
.step-panel__title{margin:0 0 var(--space-4); font-size:1.3rem; color:var(--ink-0);}

.frame-block{margin-bottom:var(--space-5);}
.frame-block h3{margin:0 0 .4rem; font-size:.95rem; color:var(--ink-0); display:flex; align-items:center; gap:.5rem;}
.frame-block h4{margin:var(--space-3) 0 .3rem; font-size:.85rem; color:var(--ink-0);}
.frame-block p{margin:0; color:var(--ink-1);}
.frame-block__hint{font-size:.85rem; color:var(--ink-2);}
.frame-block ul, .frame-block ol{margin:.3rem 0 0; padding-left:1.2rem; color:var(--ink-1);}
.frame-block li{margin-bottom:.25rem;}

.guardrails-block{
  border-left:3px solid var(--teal); padding-left:var(--space-4); background:rgba(94,234,212,.04); border-radius:0 var(--radius-md) var(--radius-md) 0;
}

.tag{
  font-size:.65rem; font-weight:700; letter-spacing:.05em; text-transform:uppercase;
  padding:.15rem .5rem; border-radius:999px; border:1px solid var(--line-strong); color:var(--ink-2);
}
.tag--static{color:var(--ink-2); border-color:var(--line-strong);}
.tag--agent{color:var(--teal); border-color:rgba(94,234,212,.4); background:rgba(94,234,212,.08);}

.frame-block--static{border:1px dashed var(--line-strong); border-radius:var(--radius-md); padding:var(--space-4);}
.frame-block--agent{border:1px solid rgba(94,234,212,.3); border-radius:var(--radius-md); padding:var(--space-4); background:rgba(94,234,212,.03);}

/* ---------- Sources ---------- */
.source-list{display:flex; flex-wrap:wrap; gap:.6rem;}
.source-btn{
  display:inline-flex; align-items:center; gap:.45rem; background:var(--navy-700); border:1px solid var(--line-strong);
  color:var(--ink-1); font:inherit; font-size:.85rem; padding:.5rem .8rem; border-radius:.5rem; cursor:pointer;
}
.source-btn:hover{border-color:var(--teal); color:var(--ink-0);}
.source-btn__icon{width:14px; height:14px; flex:none;}

/* ---------- Think / analysis ---------- */
.step-actions{display:flex; flex-wrap:wrap; gap:var(--space-3); margin-top:var(--space-5);}
.analysis-status{min-height:1.4em; font-size:.88rem; color:var(--ink-2);}
.analysis-status[data-state="loading"]{color:var(--teal);}
.analysis-status[data-state="error"]{color:#f7a5a5;}
.analysis-status[data-state="success"]{color:var(--teal);}

.followup-form{display:flex; gap:.6rem; flex-wrap:wrap;}
.followup-form input{
  flex:1 1 260px; background:var(--navy-900); border:1px solid var(--line-strong); border-radius:.5rem;
  padding:.6rem .8rem; color:var(--ink-0); font:inherit;
}

.analysis-summary{margin:0 0 var(--space-3); color:var(--ink-0); font-size:.95rem;}
.findings-list{list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:var(--space-3);}
.finding{background:var(--navy-700); border:1px solid var(--line); border-radius:var(--radius-md); padding:var(--space-4);}
.finding__title{margin:0 0 .3rem; font-weight:700; color:var(--ink-0); font-size:.95rem;}
.finding__detail{margin:0 0 .5rem; color:var(--ink-1); font-size:.88rem;}
.finding__sources{display:flex; flex-wrap:wrap; gap:.4rem;}

.agent-steps-list{list-style:decimal; padding-left:1.3rem;}
.agent-steps-list li{margin-bottom:.5rem;}
.agent-steps-list .step-owner{display:block; font-size:.78rem; color:var(--ink-2); margin-top:.15rem;}

/* ---------- Review ---------- */
.draft-block label{display:block; font-size:.82rem; color:var(--ink-2); margin:0 0 .3rem; font-weight:600;}
.draft-block input, .draft-block textarea{
  width:100%; background:var(--navy-900); border:1px solid var(--line-strong); border-radius:.5rem;
  padding:.65rem .8rem; color:var(--ink-0); font:inherit; margin-bottom:var(--space-4); resize:vertical;
}
.preview-banner{
  background:rgba(94,234,212,.1); border:1px solid rgba(94,234,212,.4); color:var(--teal);
  border-radius:.5rem; padding:.7rem 1rem; font-weight:600; font-size:.9rem; margin:0 0 var(--space-3);
}
.review-status{min-height:1.4em; font-size:.85rem; color:var(--ink-2);}

/* ---------- Empty / error states ---------- */
.lab-empty-state{color:var(--ink-2); font-size:.95rem; padding:var(--space-6) 0; text-align:center;}
.lab-load-error{
  color:#f7a5a5; background:rgba(247,120,120,.08); border:1px solid rgba(247,120,120,.35);
  padding:var(--space-4); border-radius:var(--radius-md);
}

/* ---------- Modal ---------- */
.modal-backdrop{
  position:fixed; inset:0; background:rgba(3,7,15,.72); backdrop-filter:blur(3px);
  display:flex; align-items:center; justify-content:center; padding:var(--space-5); z-index:100;
}
.modal{
  width:min(560px,100%); max-height:80vh; overflow-y:auto; background:var(--navy-800);
  border:1px solid var(--line-strong); border-radius:var(--radius-lg); padding:var(--space-5);
  box-shadow:0 24px 60px rgba(0,0,0,.5);
}
.modal__header{display:flex; align-items:flex-start; justify-content:space-between; gap:var(--space-4); margin-bottom:var(--space-4);}
.modal__eyebrow{margin:0 0 .2rem; font-size:.72rem; color:var(--teal); letter-spacing:.08em; text-transform:uppercase;}
.modal h2{margin:0; font-size:1.15rem; color:var(--ink-0);}
.modal__close{
  background:transparent; border:1px solid var(--line-strong); color:var(--ink-1); border-radius:.4rem;
  width:2rem; height:2rem; font-size:1.1rem; line-height:1; cursor:pointer;
}
.modal__close:hover{color:var(--ink-0); border-color:var(--ink-2);}
.modal__body{white-space:pre-wrap; color:var(--ink-1); font-size:.92rem; line-height:1.6;}

/* ---------- Motion & responsiveness ---------- */
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.001ms !important; animation-duration:.001ms !important;}
}
html.lab-paused *{animation-play-state:paused !important;}

@media (max-width:720px){
  .lab-main{padding:var(--space-5) var(--space-4) var(--space-8);}
  .step-panel{padding:var(--space-4);}
  .lab-nav__links{gap:var(--space-3);}
  .step-actions{flex-direction:column; align-items:stretch;}
  .step-actions .lab-btn{width:100%; justify-content:center;}
}

/* ==================================================================
   2026-10-06 (user directive): the sample-workspace notice pill is
   removed; the automation-wing heading block is gone, leaving a little
   space above the demo tabs.
   ================================================================== */
.lab-sample-banner { display: none; }
.lab-demos .demo-tabs { margin-top: 28px; }