:root {
  --bg: #000;
  --dim-border: #333;
  --dim-text: #6b6b6b;
  --mid-border: #5e5e5e;
  --mid-text: #a9a9a9;
  --bright: #ffffff;
  --line: #2a2a2a;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--mid-text);
  font-family: var(--mono);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 48px 28px 110px;
  display: flex;
  flex-direction: column;
  gap: 26px;
}

/* ───────────────────────── title ───────────────────────── */
.title {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: clamp(44px, 8vw, 92px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--bright);
  margin: 0 0 16px;
}

/* ───────────────────────── inputs ───────────────────────── */
.config { display: flex; gap: 22px; }
.config input { flex: 1; min-width: 0; }

input {
  font: inherit;
  color: var(--bright);
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--dim-border);
  padding: 5px 1px;
  caret-color: var(--bright);
}
input::placeholder { color: var(--dim-text); }
input:focus { outline: none; border-bottom-color: var(--bright); }

#prompt {
  width: 100%;
  font-size: 17px;
  border-bottom-color: var(--mid-border);
  padding: 8px 1px;
}

/* ───────────────────────── pipeline ───────────────────────── */
.pipeline {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  gap: 26px;
  padding: 18px 0 4px;
}

.stage {
  position: relative;
  flex: 1 1 auto;
  min-width: max-content;
  text-align: center;
  border: 1px solid var(--dim-border);
  color: var(--dim-text);
  padding: 11px 16px;
  white-space: nowrap;
  letter-spacing: .04em;
  transition: color .2s, border-color .2s, background .2s, box-shadow .2s;
}

/* ">" connector between stages */
.stage:not(:first-child)::before {
  content: "⟩";
  position: absolute; top: 50%; left: -13px;
  transform: translate(-50%, -50%);
  color: var(--mid-border);
}

/* states */
.stage.reached { color: var(--mid-text); border-color: var(--mid-border); }
.stage.active,
.stage.streaming {
  color: var(--bright);
  border-color: var(--bright);
  box-shadow: 0 0 0 1px var(--bright);
  animation: breathe 1.3s ease-in-out infinite;
}
@keyframes breathe {
  0%, 100% { box-shadow: 0 0 0 1px var(--bright); }
  50%      { box-shadow: 0 0 12px 0 rgba(255,255,255,.35); }
}
.stage.failed {
  color: var(--bright);
  border-color: var(--bright);
  border-style: dashed;
  animation: none;
  box-shadow: none;
}

/* ───────────────────────── kafka branch ───────────────────────── */
.branch { min-height: 18px; padding-left: 2px; display: flex; align-items: center; }
.branch .stage {
  flex: 0 0 auto;
  border-style: dashed;
  font-size: 13px;
  padding: 8px 13px;
}
.branch .label { color: var(--dim-text); margin-right: 12px; }
.branch .stage::before, .branch .stage::after { display: none; }

/* ───────────────────────── meta + reply ───────────────────────── */
.meta {
  color: var(--mid-text);
  min-height: 1.5em;
  letter-spacing: .02em;
  word-break: break-word;
}
.meta .sep { color: var(--dim-text); }
.meta b { color: var(--bright); font-weight: 600; }

.reply {
  color: var(--bright);
  white-space: pre-wrap;
  word-wrap: break-word;
  font-size: 16px;
  min-height: 1.5em;
}
.reply.dim { color: var(--dim-text); }
.reply .cursor {
  display: inline-block;
  width: 7px; height: 1em;
  background: var(--bright);
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ───────────────────────── bigger picture (platform.html) ───────────────────────── */
.lead { color: var(--mid-text); margin: -10px 0 0; }

.xlink {
  display: inline-block; width: fit-content;
  color: var(--mid-text); text-decoration: none;
  border-bottom: 1px solid var(--dim-border); padding-bottom: 1px;
}
.xlink:hover { color: var(--bright); border-bottom-color: var(--bright); }

.legend { display: flex; flex-wrap: wrap; justify-content: center; gap: 22px; color: var(--mid-text); }
.legend-item { display: inline-flex; align-items: center; gap: 8px; white-space: nowrap; }
.swatch { width: 28px; height: 15px; display: inline-block; }
.swatch.hollow { border: 1px solid var(--dim-border); }
.swatch.filled { background: var(--line); border: 1px solid var(--mid-border); }
.swatch.shared { border: 1px dashed var(--mid-border); }

.stacks { display: flex; gap: 26px; align-items: stretch; margin-top: 32px; }
.stack {
  flex: 1 1 0; min-width: 0;
  display: flex; flex-direction: column;
  color: inherit; text-decoration: none;
}
.layers { display: flex; flex-direction: column; gap: 6px; }
.layer {
  border: 1px solid var(--dim-border);
  padding: 14px 14px; text-align: center;
  letter-spacing: .03em;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.layer.cust { background: transparent; border-color: var(--dim-border); color: var(--mid-text); }
.layer.do   { background: var(--line); border-color: var(--mid-border); color: var(--bright); }
.layer.split {
  background: linear-gradient(100deg, var(--line) 0 48%, transparent 52% 100%);
  border-color: var(--mid-border); color: var(--bright);
  display: flex; justify-content: space-between; gap: 8px;
}
.layer.split .byom { color: var(--mid-text); }

.shared {
  position: relative;
  display: flex; flex-direction: column; gap: 6px;
  outline: 1px dashed var(--mid-border);   /* outline takes no layout space, so rows stay aligned across columns */
  outline-offset: 3px;
}
.shared-tag {
  position: absolute; right: 0; bottom: -7px;
  background: var(--bg); padding: 0 5px;
  font-size: .78em; line-height: 1; color: var(--mid-text);
}

.stack-name { margin-top: auto; padding-top: 14px; text-align: center; color: var(--bright); font-weight: 600; font-size: 1.25em;}
.stack-tier { text-align: center; color: var(--dim-text); font-size: .85em; margin-top: 2px; }

/* inference router — a title below, connected up to the Dedicated (PaaS) and Serverless (TaaS)
   columns with right-angle lines. columns are 3 equal flex cells with a 26px gap, so the middle
   column centers on 50% and the right column one (column + gap) = (100% + 26px)/3 further right. */
.router { position: relative; height: 66px; }
.router .bar {
  position: absolute; top: 26px; left: 50%;
  width: calc((100% + 26px) / 3);
  border-top: 1px solid var(--mid-border);
}
.router .arm {
  position: absolute; top: 12px; height: 14px;
  border-left: 1px solid var(--mid-border);
}
.router .arm.l { left: 50%; }
.router .arm.r { left: calc(50% + (100% + 26px) / 3); }
.router .stem {
  position: absolute; top: 26px; height: 14px;
  left: calc(50% + (100% + 26px) / 6);
  border-left: 1px solid var(--mid-border);
}
.router .router-label {
  position: absolute; top: 42px;
  left: calc(50% + (100% + 26px) / 6);
  transform: translateX(-50%);
  white-space: nowrap;
  color: var(--bright); font-weight: 600;
}

/* serverless inference is the demo entry point */
.stack.link { cursor: pointer; }
.stack.link:hover .layer.do { box-shadow: 0 0 0 1px var(--bright); }
.stack.link:hover .shared { border-color: var(--bright); }
.stack.link:hover .stack-name { text-decoration: underline; }

/* ───────────────────────── cellar / footer ───────────────────────── */
.cellar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 10;
  width: 100%;
  padding: 16px 28px;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 16px;
  color: var(--dim-text);
}
.cellar a { display: inline-flex; }
.cellar .do-logo {
  height: 22px;
  width: auto;
  filter: invert(1);   /* black mark → white on the dark background */
  opacity: .8;
  transition: opacity .15s;
}
.cellar a:hover .do-logo { opacity: 1; }