/* Palette: from the class itself.
   sky        #EEF3F7  page, like a pale chart
   sailcloth  #FFFFFF  sails, input
   water      #0F2D4A  text and drawing lines (deep water navy)
   insignia   #1D5BB8  accent: the J/105 class insignia is blue by rule
   signal     #F2C318  code flag Q yellow: "online" (our command is Q)
   line       #8FA3B8  rules, dimension lines
   muted      #53677B  secondary text                                   */
:root {
  --sky: #EEF3F7;
  --sailcloth: #FFFFFF;
  --water: #0F2D4A;
  --insignia: #1D5BB8;
  --signal: #F2C318;
  --line: #8FA3B8;
  --muted: #53677B;
  --ui: "Avenir Next", Avenir, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --log: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
}

* { box-sizing: border-box; }

html { background: var(--sky); color: var(--water); }

body {
  margin: 0;
  font: 400 1rem/1.5 var(--ui);
  -webkit-font-smoothing: antialiased;
}

.layout {
  max-width: 72rem;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
  display: grid;
  grid-template-columns: minmax(16rem, 30rem) minmax(0, 1fr);
  gap: 3rem;
  align-items: start;
}

/* ---- the sail plan ---------------------------------------------------- */
.plan {
  margin: 0;
  position: sticky;
  top: 1.5rem;
}
.plan svg { display: block; width: 100%; height: auto; max-height: 86vh; }
.plan figcaption { margin-top: 0.75rem; font-size: 0.85rem; color: var(--muted); max-width: 30em; }

.sail { fill: var(--sailcloth); stroke: var(--water); stroke-width: 1.25px; vector-effect: non-scaling-stroke; stroke-linejoin: round; }
.topsides { fill: var(--sailcloth); stroke: var(--water); stroke-width: 1.25px; vector-effect: non-scaling-stroke; stroke-linejoin: round; }
.bottom { fill: var(--water); stroke: var(--water); stroke-width: 1px; vector-effect: non-scaling-stroke; }
.spar { stroke: var(--water); stroke-width: 2.5px; vector-effect: non-scaling-stroke; stroke-linecap: round; }
.rigging { stroke: var(--water); stroke-width: 0.9px; vector-effect: non-scaling-stroke; }
.water { stroke: var(--insignia); stroke-width: 1px; vector-effect: non-scaling-stroke; opacity: 0.5; }
.dim { stroke: var(--line); stroke-width: 1px; vector-effect: non-scaling-stroke; }
.labels text { font: 500 1.45px var(--ui); fill: var(--muted); }

.spinnaker {
  fill: var(--insignia);
  fill-opacity: 0;
  stroke: var(--insignia);
  stroke-width: 1px;
  stroke-dasharray: 4 4;
  vector-effect: non-scaling-stroke;
  transition: fill-opacity 0.6s ease, stroke-dasharray 0.6s ease;
}
.spinnaker.filling { fill-opacity: 0.85; stroke-dasharray: none; }

/* ---- the conversation ------------------------------------------------- */
.talk { max-width: 38rem; padding-top: 1rem; }

h1 {
  margin: 0 0 1rem;
  font: 600 clamp(2.1rem, 4.2vw, 3.1rem)/1.05 var(--ui);
  letter-spacing: -0.02em;
}

.intro { margin: 0 0 1.25rem; font-size: 1.08rem; max-width: 36em; }

.status {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 1.75rem;
  color: var(--muted);
  font-size: 0.95rem;
}
/* a square, like code flag Q */
.flag { width: 0.8rem; height: 0.8rem; flex: none; border: 1.5px solid var(--line); background: transparent; }
.status.online .flag { background: var(--signal); border-color: #C99E00; }
.status.online { color: var(--water); }

.ask-row { display: flex; gap: 0.5rem; }

input {
  font: inherit;
  color: var(--water);
  background: var(--sailcloth);
  border: 1.5px solid var(--line);
  border-radius: 6px;
  padding: 0.7rem 0.85rem;
  min-width: 0;
}
#question { flex: 1; font-size: 1.05rem; }
input::placeholder { color: #8797A8; }

button {
  font: 600 1rem var(--ui);
  border-radius: 6px;
  cursor: pointer;
}
#ask-button {
  background: var(--insignia);
  color: #fff;
  border: 0;
  padding: 0 1.4rem;
}
#ask-button:disabled { background: var(--line); cursor: default; }

:focus-visible { outline: 3px solid var(--signal); outline-offset: 2px; }

.passphrase { display: flex; align-items: center; gap: 0.6rem; margin-top: 0.6rem; font-size: 0.95rem; }
.passphrase[hidden] { display: none; }

.hidden-label {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

.form-error { min-height: 1.5em; margin: 0.5rem 0 0; color: #A3261B; font-size: 0.95rem; }

.examples {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin: 0.25rem 0 2rem;
  font-size: 0.9rem;
  color: var(--muted);
}
.examples span { margin-right: 0.2rem; }
.examples button {
  font: 500 0.9rem var(--ui);
  color: var(--insignia);
  background: transparent;
  border: 1px solid var(--line);
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
}
.examples button:hover { border-color: var(--insignia); }

/* newest first; each entry reads like a logbook line */
.log { list-style: none; margin: 0; padding: 0; }
.entry { padding: 1.25rem 0; border-top: 1px solid #D5DEE7; }
.entry .q { margin: 0 0 0.4rem; font-weight: 600; }
.entry .a { margin: 0; font: 400 1.15rem/1.6 var(--log); max-width: 34em; white-space: pre-wrap; }
.entry .meta { margin: 0.45rem 0 0; font-size: 0.85rem; color: var(--muted); }
.entry.error .a { color: #A3261B; font-family: var(--ui); font-size: 1rem; }

.caret {
  display: inline-block;
  width: 0.5em; height: 1.05em;
  margin-left: 1px;
  vertical-align: -0.15em;
  background: var(--insignia);
  animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.fine { margin-top: 2.5rem; font-size: 0.85rem; color: var(--muted); max-width: 36em; }

/* ---- small screens: the drawing becomes a banner ---------------------- */
@media (max-width: 760px) {
  .layout { grid-template-columns: 1fr; gap: 1.5rem; padding-top: 1.25rem; }
  .plan { position: static; }
  .plan svg { max-height: 44vh; margin: 0 auto; }
  .plan figcaption { text-align: center; margin-inline: auto; }
  .talk { padding-top: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .spinnaker { transition: none; }
  .caret { animation: none; }
}