/* Global stylesheet. Ambitious brand: constructed editorial, cream, square, blue as signal. */

@font-face { font-family: 'STK Bureau Serif'; src: url(fonts/STKBureauSerif-Book-Trial.otf); }
@font-face { font-family: 'STK Bureau Sans'; src: url(fonts/STKBureauSans-Book-Trial.otf); }
@font-face { font-family: 'STK Bureau Sans SemiMono'; src: url(fonts/STKBureauSansSemiMono-Regular-TRIAL.otf); }
@font-face { font-family: 'STK Bureau Sans Mono'; src: url(fonts/STKBureauSansMono-Book-TRIAL.otf); }

:root {
  --blue-100: #577ff9; --blue-20: #dde5fe; --blue-10: #eef2fe;
  --n-100: #181917; --n-90: #30322f; --n-80: #4b4d49; --n-70: #696c66; --n-60: #888b84;
  --n-40: #bfbcb7; --n-30: #e5e6e2; --n-20: #f5f0eb; --n-10: #f9faf8; --white: #fff;
  --golden: #ffc64b;
  --rust: #b5571c; --green: #32814d;

  --bg: var(--n-20); --card: var(--white); --text: var(--n-100); --text-2: var(--n-80);
  --text-3: var(--n-70); --signal: var(--blue-100); --rule: var(--n-40);

  --serif: 'STK Bureau Serif', Georgia, serif;
  --sans: 'STK Bureau Sans', Arial, sans-serif;
  --label: 'STK Bureau Sans SemiMono', 'Courier New', monospace;
  --mono: 'STK Bureau Sans Mono', 'Courier New', monospace;
}

*, *::before, *::after { box-sizing: border-box; border-radius: 0; }
html { -webkit-font-smoothing: antialiased; }
html, body { overflow-x: clip; }
body { margin: 0; background: var(--bg); color: var(--text); font: 400 16px/1.45 var(--sans); min-height: 100vh; display: flex; flex-direction: column; }
h1, h2, h3 { font-family: var(--serif); font-weight: 400; margin: 0; letter-spacing: -0.01em; }
h1 { font-size: clamp(34px, 5vw, 52px); line-height: 1.02; }
h2 { font-size: 28px; line-height: 1.15; }
h3 { font-size: 21px; line-height: 1.2; }
b, strong { font-weight: 400; }
em, i { font-style: normal; }
a { color: inherit; text-underline-offset: 3px; text-decoration-color: var(--n-40); }
a:hover { text-decoration-color: var(--signal); }
p { margin: 0 0 .7em; }
p:last-child { margin-bottom: 0; }
code, pre { font-family: var(--mono); font-size: 13px; }
pre { white-space: pre-wrap; word-break: break-word; margin: 0; }
hr { border: 0; border-top: 1px solid var(--rule); margin: 0; }

/* ---- Frame ---- */
.top { display: flex; align-items: center; gap: 32px; padding: 20px 40px; border-bottom: 1px solid var(--rule); }
.top .brand { display: flex; align-items: center; gap: 12px; text-decoration: none; font-family: var(--label); font-size: 14px; }
.top .brand img { height: 28px; }
.top nav { display: flex; gap: 24px; font-size: 15px; }
.top nav a { text-decoration: none; color: var(--text-2); }
.top nav a.on, .top nav a:hover { color: var(--text); }
.top .spacer { flex: 1; }
.top .account { display: flex; align-items: center; gap: 14px; }
.login { max-width: 420px; margin: 8vh auto 0; }
.login form { display: grid; gap: 18px; margin-top: 28px; }
.login label { display: grid; gap: 6px; }
.login input { font: 400 16px/1.4 var(--sans); padding: 12px 14px; border: 1px solid var(--n-40); background: var(--white); color: var(--text); width: 100%; }
.login input:focus { outline: none; border-color: var(--signal); }
.login .error { color: var(--rust); font-size: 15px; }
.login button { justify-self: start; }
main { width: 100%; max-width: 1040px; margin: 0 auto; padding: 48px 40px 96px; position: relative; flex: 1; }
main.narrow { max-width: 820px; }
.footer { text-align: right; font-family: var(--mono); font-size: 12px; color: var(--text-3); padding: 0 40px 24px; }

/* Construction arc: one per page, cropped, behind content. */
.construction { position: fixed; right: -260px; top: 80px; width: min(720px, 90vw); height: min(720px, 90vw); pointer-events: none; z-index: -1; }
.construction circle, .construction line { stroke: var(--blue-100); stroke-width: 1.2; fill: none; opacity: .35; }

/* ---- Type helpers ---- */
.label { font-family: var(--label); font-size: 13px; color: var(--text-2); letter-spacing: .01em; }
.muted { color: var(--text-2); }
.subtle { color: var(--text-3); font-size: 14px; }
.lede { font-size: 19px; color: var(--text-2); max-width: 60ch; margin-top: 14px; }
.head { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: 40px; }
.stack > * + * { margin-top: 16px; }
.row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }

.diamond { display: inline-block; width: 8px; height: 8px; background: var(--signal); transform: rotate(45deg); flex: none; }
.diamond.neutral { background: var(--n-100); }
.diamond.hollow { background: transparent; outline: 1.2px solid var(--signal); outline-offset: -1.2px; }

/* ---- Controls ---- */
.btn, button { font: 400 15px/1 var(--sans); padding: 12px 18px; border: 1px solid var(--n-100); background: var(--n-100); color: var(--n-20); cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; gap: 10px; }
.btn:hover, button:hover { background: var(--n-90); }
.btn.signal, button.signal { background: var(--signal); border-color: var(--signal); color: var(--white); }
.btn.signal:hover, button.signal:hover { background: #4a71ea; }
.btn.ghost, button.ghost { background: transparent; color: var(--text); border-color: var(--n-40); }
.btn.ghost:hover, button.ghost:hover { border-color: var(--n-100); background: transparent; }
.btn.small, button.small { padding: 8px 12px; font-size: 14px; }
form.inline { display: inline; margin: 0; }
textarea { font: 400 16px/1.45 var(--sans); width: 100%; border: 1px solid var(--n-40); background: var(--white); padding: 14px 16px; resize: vertical; color: var(--text); }
textarea:focus { outline: none; border-color: var(--signal); }

/* ---- Cards and tags ---- */
.card { background: var(--card); padding: 24px 28px; }
.card.dark { background: var(--n-100); color: var(--n-20); }
.card.dark .label, .card.dark .muted { color: var(--n-40); }
.card-head { display: flex; align-items: center; gap: 10px; padding-bottom: 12px; margin-bottom: 16px; border-bottom: 1px solid var(--rule); }
.tag { font-family: var(--label); font-size: 12px; padding: 3px 8px; border: 1px solid var(--n-40); color: var(--text-2); white-space: nowrap; }
.status { font-family: var(--label); font-size: 12px; display: inline-flex; align-items: center; gap: 7px; }
.status::before { content: ""; width: 7px; height: 7px; transform: rotate(45deg); background: var(--n-60); }
.status.running::before { background: var(--signal); animation: pulse 1.2s ease-in-out infinite; }
.status.succeeded::before { background: var(--green); }
.status.failed::before { background: var(--rust); }
.status.paused::before { background: transparent; outline: 1px solid var(--n-60); }
@keyframes pulse { 50% { opacity: .25; } }

/* ---- Operators list ---- */
.ops { display: grid; gap: 2px; }
.op { display: grid; grid-template-columns: 1fr 220px 120px; gap: 32px; align-items: start; background: var(--card); padding: 22px 28px; }
.op h3 a { text-decoration: none; }
.op .apps { margin-top: 10px; }
.op .actions { display: flex; justify-content: flex-end; gap: 8px; }
.op .recent { margin-top: 14px; gap: 8px; }
.run-dot { width: 9px; height: 9px; transform: rotate(45deg); background: var(--n-60); display: inline-block; }
.run-dot.running { background: var(--signal); animation: pulse 1.2s ease-in-out infinite; }
.run-dot.succeeded { background: var(--green); }
.run-dot.failed { background: var(--rust); }
.run-dot:hover { outline: 2px solid var(--n-100); outline-offset: 2px; }
ul.diamonds { list-style: none; padding: 0; margin: 0; }
ul.diamonds > li { position: relative; padding-left: 16px; margin: 4px 0; }
ul.diamonds > li::before { content: ""; position: absolute; left: 1px; top: .55em; width: 5px; height: 5px; background: var(--n-60); transform: rotate(45deg); }
.table-wrap { overflow-x: auto; }
.empty { border: 1px dashed var(--n-40); padding: 56px; text-align: center; }

/* ---- Definition grid ---- */
.grid2 { display: grid; grid-template-columns: 2fr 1fr; gap: 24px; align-items: start; }
.grid2 > *, .op > *, .msg > * { min-width: 0; }
dl.kv { display: grid; grid-template-columns: 84px 1fr; gap: 10px 16px; margin: 0; }
dl.kv dt { font-family: var(--label); font-size: 13px; color: var(--text-2); padding-top: 2px; }
dl.kv dd { margin: 0; }
.prompt { background: var(--n-10); border-left: 2px solid var(--signal); padding: 16px 18px; max-height: 420px; overflow: auto; font: 400 14px/1.5 var(--sans); white-space: pre-wrap; }

table { border-collapse: collapse; width: 100%; font-size: 15px; }
th { font-family: var(--label); font-weight: 400; text-align: left; color: var(--text-2); padding: 8px 12px; border-bottom: 1px solid var(--n-100); font-size: 13px; }
td { padding: 11px 12px; border-bottom: 1px solid var(--rule); vertical-align: top; }

/* ---- Timeline (builder chat + run observer) ---- */
.thread { display: flex; flex-direction: column; gap: 18px; }
.msg { display: grid; grid-template-columns: 96px 1fr; gap: 18px; }
.msg .who { font-family: var(--label); font-size: 12px; color: var(--text-2); padding-top: 4px; display: flex; gap: 8px; align-items: baseline; }
.msg .who .diamond { transform: rotate(45deg) translateY(-1px); }
.msg .body { min-width: 0; }
.msg.user .body { background: var(--card); padding: 14px 18px; }
.msg.user .who, .msg.trigger .who { padding-top: 17px; }
.msg.error .who { padding-top: 12px; }
.msg.assistant .body { padding-top: 1px; }
.msg.trigger .body { background: var(--blue-10); border-left: 2px solid var(--signal); padding: 14px 18px; white-space: pre-wrap; }
.msg.error .body { border-left: 2px solid var(--rust); padding: 10px 16px; color: var(--rust); font-family: var(--mono); font-size: 13px; }
.body ul, .body ol { padding-left: 20px; margin: 0 0 .7em; }
.body li { margin: 3px 0; }
.body table { margin: 8px 0; font-size: 14px; background: var(--card); }
.body h1, .body h2, .body h3 { font-size: 19px; margin: 12px 0 6px; }
.body code { background: var(--n-30); padding: 1px 4px; }
.body pre code { background: none; padding: 0; }
.body pre { background: var(--n-10); padding: 12px; margin: 8px 0; }

details.tool { border: 1px solid var(--n-40); background: var(--n-10); }
details.tool summary { list-style: none; cursor: pointer; padding: 9px 14px; display: flex; align-items: center; gap: 10px; font-family: var(--label); font-size: 13px; }
details.tool summary::-webkit-details-marker { display: none; }
details.tool summary .name { color: var(--text); }
details.tool summary .hint { color: var(--text-3); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; font-family: var(--mono); font-size: 12px; }
details.tool summary .state { font-family: var(--label); font-size: 12px; color: var(--text-3); }
details.tool[open] summary { border-bottom: 1px solid var(--n-30); }
details.tool .io { padding: 12px 14px; display: grid; gap: 10px; }
details.tool .io pre { max-height: 320px; overflow: auto; background: var(--white); padding: 10px 12px; border: 1px solid var(--n-30); }

.connect { background: var(--card); padding: 18px 20px; display: flex; align-items: center; gap: 16px; border-left: 2px solid var(--signal); flex-wrap: wrap; }
.connect .what { flex: 1; min-width: 200px; }
.connect.connected { border-left-color: var(--green); }
.thread .connect { margin-bottom: -8px; }

.thinking { font-family: var(--label); font-size: 13px; color: var(--text-2); display: flex; align-items: center; gap: 10px; }
.thinking .diamond { animation: pulse 1.2s ease-in-out infinite; }

.composer.first { border-top: 0; margin-top: 0; padding-top: 0; }
.composer { position: sticky; bottom: 0; background: var(--bg); border-top: 1px solid var(--rule); padding: 16px 0 24px; margin-top: 32px; }
.composer form { display: grid; grid-template-columns: 1fr auto; gap: 10px; align-items: end; }
.readonly-note { border-top: 1px solid var(--rule); margin-top: 32px; padding-top: 16px; }

@media (max-width: 760px) {
  .top { padding: 16px; gap: 20px; }
  .top .account .subtle { display: none; }
  .construction { display: none; }
  .card { padding: 20px; }
  .op { padding: 20px; gap: 16px; }
  main { padding: 32px 16px 80px; }
  .op, .grid2 { grid-template-columns: 1fr; }
  .op .actions { justify-content: flex-start; }
  .msg { grid-template-columns: 1fr; gap: 6px; }
  .msg .who, .msg.user .who, .msg.trigger .who, .msg.error .who { padding-top: 0; }
  .msg .who:empty { display: none; }
  .head { flex-direction: column; align-items: flex-start; }
}