:root{--ink:#1C1F24;--ink2:#2A2E35;--muted:#5F6670;--paper:#FFF7F7;--card:#FFFFFF;--sand:#F5F2EE;--line:rgba(28,31,36,.13);--teal:#0E5A64;--teal-lt:#17A8AD;--side:268px}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{height:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:15px/1.55 Inter,system-ui,-apple-system,"Segoe UI",sans-serif;height:100dvh;overflow:hidden}
button{font:inherit}
.logo{font:700 19px/1 Sora,sans-serif;color:#F2F2F2;letter-spacing:-.02em;text-decoration:none}
.logo span{box-shadow:inset 0 -3px 0 var(--teal);padding-bottom:3px}

/* ---- layout ---- */
.shell{display:flex;height:100dvh}
#side{display:none;width:var(--side);flex:none;background:var(--ink);color:#E6E7E9;flex-direction:column;border-right:1px solid #000}
.authed #side{display:flex}
.main{flex:1;min-width:0;display:flex;flex-direction:column;height:100dvh}
.col{flex:1;min-height:0;width:100%;max-width:780px;margin:0 auto;padding:18px 20px 8px;display:flex;flex-direction:column;gap:12px}

/* ---- sidebar ---- */
.side-top{display:flex;align-items:center;justify-content:space-between;padding:20px 18px 16px}
.btn-new{margin:0 14px 16px;display:flex;align-items:center;justify-content:center;gap:8px;background:var(--teal);color:#fff;border:0;border-radius:999px;padding:10px 14px;font:600 13.5px Sora,sans-serif;cursor:pointer}
.btn-new:hover{filter:brightness(1.12)}
.btn-new span{font-size:17px;line-height:1}
.side-label{padding:0 18px 6px;font:600 10.5px/1 Sora,sans-serif;letter-spacing:.14em;text-transform:uppercase;color:#8A919B}
#history{flex:1;overflow-y:auto;padding:4px 8px 12px}
.h-item{position:relative;display:block;width:100%;text-align:left;background:none;border:0;border-radius:10px;padding:9px 34px 9px 12px;color:#D9DBDF;cursor:pointer;margin-bottom:2px}
.h-item:hover{background:rgba(255,255,255,.06)}
.h-item.on{background:rgba(255,255,255,.1);color:#fff}
.h-title{display:block;font-size:13.5px;line-height:1.35;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.h-meta{display:flex;align-items:center;gap:6px;margin-top:3px;font-size:11.5px;color:#8A919B}
.dot{width:6px;height:6px;border-radius:50%;background:#8A919B}
.dot.open{background:#E0A43B}.dot.done{background:var(--teal-lt)}
.h-del{position:absolute;right:6px;top:50%;transform:translateY(-50%);width:24px;height:24px;border:0;border-radius:6px;background:none;color:#8A919B;cursor:pointer;opacity:0;font-size:15px;line-height:24px}
.h-item:hover .h-del,.h-del:focus-visible{opacity:1}
.h-del:hover{background:rgba(255,255,255,.1);color:#fff}
.h-empty{padding:8px 12px;font-size:13px;color:#8A919B}
.acct{border-top:1px solid rgba(255,255,255,.08);padding:14px 16px 16px;display:flex;flex-direction:column;gap:10px}
.acct-name{font:600 13.5px Sora,sans-serif;color:#fff}
.acct-email{font-size:12px;color:#8A919B;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.credits{display:flex;align-items:baseline;gap:6px}
.credits-n{font:700 22px/1 Sora,sans-serif;color:#fff}
.credits-l{font-size:12.5px;color:#B5BAC1}
.credits.low .credits-n{color:#E0A43B}
.btn-buy{display:block;text-align:center;border:1px solid rgba(255,255,255,.22);color:#fff;border-radius:999px;padding:8px 12px;font:600 13px Sora,sans-serif;text-decoration:none}
.btn-buy:hover{border-color:var(--teal-lt);color:var(--teal-lt)}
.link-btn{align-self:flex-start;background:none;border:0;padding:0;color:#8A919B;font-size:12.5px;cursor:pointer;text-decoration:underline;text-underline-offset:2px}
.link-btn:hover{color:#fff}
.icon-btn{background:none;border:0;color:inherit;cursor:pointer;font-size:22px;line-height:1;padding:4px 6px;border-radius:8px}
.only-mobile{display:none}
.scrim{display:none}

/* ---- top bar ---- */
.topbar{flex:none;height:56px;display:flex;align-items:center;gap:12px;padding:0 20px;background:var(--ink);color:#fff;border-bottom:1px solid var(--teal)}
.authed .topbar{background:var(--paper);color:var(--ink);border-bottom:1px solid var(--line)}
.menu-btn{display:none;width:34px;height:34px;flex-direction:column;justify-content:center;align-items:center;gap:4px}
.menu-btn span{display:block;width:18px;height:2px;background:currentColor;border-radius:2px}
.top-logo{margin-right:auto}
.authed .top-logo{display:none}
.tb-title{flex:1;min-width:0;font:600 14px Sora,sans-serif;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tb-actions{display:flex;gap:8px}
.btn-ghost{background:#fff;border:1px solid var(--line);color:var(--ink);border-radius:999px;padding:7px 14px;font:500 12.5px Sora,sans-serif;cursor:pointer}
.btn-ghost:hover{border-color:var(--teal);color:var(--teal)}

/* ---- intro + progress ---- */
.intro{flex:none}
.eyebrow{font:600 11.5px/1 Sora,sans-serif;letter-spacing:.16em;text-transform:uppercase;color:var(--teal);margin:0 0 8px}
h1{font:700 clamp(22px,3.6vw,28px)/1.15 Sora,sans-serif;letter-spacing:-.025em;margin:0 0 6px}
.sub{margin:0;color:var(--muted);font-size:14px}
.started .intro{display:none}
#prog{flex:none;display:none}
#prog.on{display:block}
.ptxt{display:flex;justify-content:space-between;font:600 11.5px/1 Sora,sans-serif;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:8px}
.track{height:5px;background:var(--sand);border-radius:999px;overflow:hidden}
#pbar{height:100%;width:0;background:var(--teal);border-radius:999px;transition:width .4s ease}

/* ---- chat ---- */
#wrap{flex:1;min-height:0;background:var(--card);border:1px solid var(--line);border-radius:18px;display:flex;flex-direction:column;overflow:hidden;box-shadow:0 1px 2px rgba(28,31,36,.04),0 8px 28px rgba(28,31,36,.06)}
#chat{flex:1;padding:22px 22px 18px;overflow-y:auto;display:flex;flex-direction:column;gap:12px}
.m{max-width:86%;font-size:14.5px;line-height:1.6;overflow-wrap:anywhere}
.m p{margin:0 0 10px}.m p:last-child,.m ul:last-child,.m ol:last-child{margin-bottom:0}
.m strong{font-weight:600}.bot strong{font-family:Sora,sans-serif;font-weight:600;letter-spacing:-.005em}
.m h4{margin:20px 0 6px;font:600 15px/1.35 Sora,sans-serif;letter-spacing:-.01em}.m h4:first-child{margin-top:0}
.m ul,.m ol{margin:0 0 10px;padding-left:20px}.m li{margin:4px 0}
.m hr{border:0;border-top:1px solid var(--line);margin:14px 0}
.tw{overflow-x:auto;margin:0 0 10px}.m table{border-collapse:collapse;font-size:13px;min-width:max(100%,540px);background:#fff}
.m th,.m td{overflow-wrap:normal;word-break:normal;border:1px solid var(--line);padding:7px 9px;text-align:left;vertical-align:top}.m th{background:var(--ink);color:#fff;font:600 12px/1.3 Sora,sans-serif}
.m blockquote{margin:0 0 10px;padding:10px 14px;border-left:3px solid var(--teal);background:#fff;border-radius:6px}
.brow{display:flex;gap:10px;align-items:flex-start;align-self:stretch}.brow+.brow{margin-top:-2px}
.av{flex:none;width:28px;height:28px;border-radius:50%;background:var(--ink);color:#fff;font:600 10.5px/28px Sora,sans-serif;text-align:center;letter-spacing:.04em;margin-top:1px}
.brow+.brow .av{visibility:hidden}
.bot{color:var(--ink);padding:4px 0 0}
.bot a{color:var(--teal);font-weight:600}
.bot .hint{margin-top:6px;font-size:12.5px;color:var(--muted)}
.plan{max-width:100%;flex:1;min-width:0;background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:18px 20px}
.me{background:var(--ink);color:#fff;align-self:flex-end;padding:9px 14px;border-radius:14px;border-bottom-right-radius:4px;white-space:pre-wrap;font-size:14px;max-width:78%}
.chips,.actions,.retry{margin-left:38px}
.chips{align-self:flex-start;display:flex;gap:6px;flex-wrap:wrap;max-width:86%}
.chips button{background:#fff;color:var(--ink);border:1px solid var(--line);border-radius:999px;padding:6px 13px;font:500 13px/1.2 Sora,sans-serif;cursor:pointer;transition:all .15s}
.chips button:hover{border-color:var(--teal);color:var(--teal);background:rgba(14,90,100,.05)}
.chips.used{display:none}
.retry{align-self:flex-start;background:transparent;color:var(--teal);border:1px solid var(--teal);border-radius:999px;padding:6px 14px;cursor:pointer;font:500 13px Sora,sans-serif}
.actions{align-self:flex-start;display:flex;gap:8px;flex-wrap:wrap}
.actions button,.actions a{background:var(--teal);color:#fff;border:1px solid var(--teal);border-radius:999px;padding:8px 16px;font:600 13px Sora,sans-serif;cursor:pointer;text-decoration:none}
.actions .alt{background:#fff;color:var(--teal)}

/* thinking indicator */
.think{display:flex;align-items:center;gap:10px;flex-wrap:wrap;color:var(--muted)}
.dots{display:inline-flex;gap:4px;padding:3px 0}
.dots i{width:6px;height:6px;border-radius:50%;background:var(--teal);opacity:.3;animation:blink 1.2s infinite ease-in-out}
.dots i:nth-child(2){animation-delay:.2s}.dots i:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,80%,100%{opacity:.25;transform:translateY(0)}40%{opacity:1;transform:translateY(-2px)}}
.tlabel{font:500 13.5px Sora,sans-serif;color:var(--ink);transition:opacity .3s}
.ttime{font:500 12px/1 Sora,sans-serif;color:var(--muted);background:var(--sand);border-radius:999px;padding:4px 8px;font-variant-numeric:tabular-nums}
.tnote{flex-basis:100%;font-size:12.5px}
.think-card{flex:1;background:var(--paper);border:1px dashed var(--line);border-radius:14px;padding:14px 16px;max-width:100%}
.tbar{flex-basis:100%;height:3px;background:var(--sand);border-radius:999px;overflow:hidden}
.tbar b{display:block;height:100%;width:0;background:var(--teal);transition:width 1s linear}

/* ---- composer ---- */
#bar{display:flex;gap:8px;align-items:flex-end;border-top:1px solid var(--line);padding:12px;background:#fff}
#in{flex:1;resize:none;max-height:160px;padding:11px 16px;background:var(--paper);border:1px solid var(--line);border-radius:20px;color:var(--ink);outline:none;font:15px/1.4 Inter,system-ui,sans-serif}
#in:focus{border-color:var(--teal);box-shadow:0 0 0 3px rgba(14,90,100,.12)}#in::placeholder{color:#8A9099}
#go{background:var(--teal);color:#fff;border:none;height:42px;padding:0 20px;border-radius:999px;cursor:pointer;font:600 13.5px Sora,sans-serif}
#go:disabled,#in:disabled{opacity:.5;cursor:not-allowed}
:focus-visible{outline:2px solid var(--teal-lt);outline-offset:2px}
.credit{flex:none;padding:2px 0 max(8px,env(safe-area-inset-bottom));text-align:center;font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;color:#8A9099}
.credit a{color:var(--muted);font-weight:600;text-decoration:none}

/* ---- phones ---- */
@media (max-width:860px){
  .authed #side{position:fixed;z-index:30;left:0;top:0;bottom:0;transform:translateX(-100%);transition:transform .25s ease}
  .side-open #side{transform:none}
  .side-open .scrim{display:block;position:fixed;inset:0;z-index:20;background:rgba(0,0,0,.35)}
  .authed .menu-btn{display:flex}
  .only-mobile{display:block;color:#fff}
  .col{padding:12px 12px 6px}
  .topbar{padding:0 12px}
  #chat{padding:16px 14px}
  .m{max-width:100%}.me{max-width:85%}
  #in{font-size:16px}
  .plan{padding:14px}
  .av{display:none}
  .chips,.actions,.retry{margin-left:0}
  .btn-ghost{padding:6px 11px}
}

/* ---- print / PDF ---- */
#print{display:none}
@media print{
  @page{margin:18mm}
  body{background:#fff;color:#1C1F24;height:auto;overflow:visible}
  .shell{display:none!important}
  #print{display:block;font:10.5pt/1.55 Inter,system-ui,sans-serif}
  #print .pl{font:700 15pt/1 Sora,sans-serif;letter-spacing:-.02em;margin:0 0 18pt}#print .pl span{border-bottom:2.5px solid #0E5A64}
  #print h1{font:700 22pt/1.15 Sora,sans-serif;letter-spacing:-.02em;margin:0 0 4pt}
  #print h2{font:700 13pt/1.3 Sora,sans-serif;color:#0E5A64;text-transform:uppercase;letter-spacing:.1em;margin:18pt 0 6pt;page-break-after:avoid}
  #print h3{font:700 12.5pt/1.3 Sora,sans-serif;margin:16pt 0 4pt;padding-bottom:3pt;border-bottom:1px solid #C9D8E8;page-break-after:avoid}
  #print table{border-collapse:collapse;width:100%;font-size:9pt;margin:6pt 0;page-break-inside:avoid}#print th,#print td{border:1px solid #ccc;padding:4pt 5pt;text-align:left;vertical-align:top}#print th{background:#1C1F24;color:#fff}
  #print blockquote{margin:8pt 0;padding:6pt 12pt;border-left:3px solid #0E5A64;background:#F5F2EE}
  #print ul,#print ol{padding-left:18pt}#print hr{border:0;border-top:1px solid #ddd;margin:16pt 0}#print a{color:#0E5A64}
}