/public/assets/styles.css

:root {
  --harbor: #08151d;
  --glass: #123041;
  --chart: #e6d5b0;
  --beacon: #e7a23a;
  --foam: #8fb9b7;
  --wick: #f4efe3;
  --ink: #132028;
  --mute: #8aa0a6;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--harbor);
  color: var(--wick);
  font-family: "IBM Plex Sans", ui-sans-serif, system-ui, sans-serif;
}

body {
  min-height: 100svh;
  overflow: hidden;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.beam,
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
}

.beam {
  transform-origin: 12% 12%;
  background:
    radial-gradient(circle at 18% 18%, rgb(231 162 58 / 28%), transparent 28%),
    conic-gradient(from 210deg at 12% 12%, transparent 0 72deg, rgb(231 162 58 / 16%) 86deg, transparent 104deg);
  animation: sweep 14s linear infinite;
  mix-blend-mode: screen;
}

body.is-thinking .beam {
  animation-duration: 2.4s;
  background:
    radial-gradient(circle at 18% 18%, rgb(231 162 58 / 42%), transparent 32%),
    conic-gradient(from 210deg at 12% 12%, transparent 0 64deg, rgb(244 239 227 / 22%) 82deg, transparent 108deg);
}

.grain {
  opacity: 0.09;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");
}

@keyframes sweep {
  to { transform: rotate(360deg); }
}

.app {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(280px, 34vw) 1fr;
  min-height: 100svh;
}

.tower {
  padding: 48px 36px;
  border-right: 1px solid rgb(230 213 176 / 14%);
  background: linear-gradient(180deg, rgb(18 48 65 / 72%), rgb(8 21 29 / 88%));
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--foam);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 0.72rem;
}

h1 {
  margin: 0;
  font-family: Syne, sans-serif;
  font-weight: 800;
  font-size: clamp(2.6rem, 6vw, 4.4rem);
  line-height: 0.9;
  letter-spacing: -0.04em;
}

.lede {
  margin: 22px 0 36px;
  max-width: 28ch;
  color: var(--chart);
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 1.15rem;
  line-height: 1.55;
}

.meta {
  margin: 0 0 36px;
  display: grid;
  gap: 14px;
}

.meta div {
  display: grid;
  gap: 4px;
  padding-bottom: 12px;
  border-bottom: 1px dashed rgb(143 185 183 / 28%);
}

.meta dt {
  color: var(--mute);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

.meta dd {
  margin: 0;
  color: var(--wick);
}

.starters-label {
  margin: 0 0 10px;
  color: var(--mute);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.starters {
  display: grid;
  gap: 8px;
}

.starters button,
.ghost,
.composer button {
  font: inherit;
}

.starters button,
.ghost {
  appearance: none;
  border: 1px solid rgb(230 213 176 / 22%);
  background: rgb(244 239 227 / 4%);
  color: var(--chart);
  text-align: left;
  border-radius: 999px;
  padding: 10px 14px;
  cursor: pointer;
}

.starters button:hover,
.ghost:hover,
.composer button:hover {
  border-color: var(--beacon);
  color: var(--wick);
}

.logbook {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 100svh;
  background:
    linear-gradient(90deg, rgb(244 239 227 / 3%), transparent 18%),
    rgb(8 21 29 / 35%);
}

.log-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 28px 0;
}

.stamp {
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--foam);
}

.ghost {
  border-radius: 999px;
}

.thread {
  list-style: none;
  margin: 0;
  padding: 24px 28px 16px;
  overflow: auto;
  display: grid;
  align-content: start;
  gap: 16px;
}

.entry {
  max-width: min(68ch, 100%);
  padding: 16px 18px 14px;
  border-radius: 18px 18px 18px 4px;
  background: rgb(18 48 65 / 78%);
  border: 1px solid rgb(143 185 183 / 16%);
}

.entry.user {
  justify-self: end;
  border-radius: 18px 18px 4px 18px;
  background: rgb(231 162 58 / 12%);
  border-color: rgb(231 162 58 / 28%);
}

.who {
  display: block;
  margin-bottom: 6px;
  color: var(--foam);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.entry.user .who { color: var(--beacon); }

.text {
  margin: 0;
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 1.05rem;
  line-height: 1.65;
  white-space: pre-wrap;
}

.entry.error {
  border-color: rgb(196 92 74 / 45%);
  color: #f1c6bc;
}

.composer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  padding: 16px 28px 28px;
  align-items: end;
}

textarea {
  width: 100%;
  resize: none;
  min-height: 64px;
  border-radius: 18px;
  border: 1px solid rgb(230 213 176 / 22%);
  background: rgb(244 239 227 / 6%);
  color: var(--wick);
  padding: 14px 16px;
  font: inherit;
  font-family: "Source Serif 4", Georgia, serif;
}

textarea:focus,
.starters button:focus-visible,
.ghost:focus-visible,
.composer button:focus-visible {
  outline: 2px solid var(--beacon);
  outline-offset: 2px;
}

.composer button {
  appearance: none;
  border: 0;
  border-radius: 999px;
  background: var(--beacon);
  color: var(--ink);
  font-weight: 600;
  padding: 14px 22px;
  cursor: pointer;
}

.composer button:disabled {
  opacity: 0.55;
  cursor: wait;
}

@media (max-width: 860px) {
  body { overflow: auto; }
  .app {
    grid-template-columns: 1fr;
  }
  .tower {
    padding: 28px 22px 18px;
    border-right: 0;
    border-bottom: 1px solid rgb(230 213 176 / 14%);
  }
  h1 { font-size: 2.4rem; }
  .lede { margin-bottom: 20px; }
  .logbook { min-height: 70svh; }
}

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