:root {
  --fr4: #102018;
  --fr4-2: #173024;
  --silk: #f3ede0;
  --silk-dim: #c9c0ad;
  --copper: #d9894a;
  --copper-2: #a35c28;
  --led: #7cffb2;
  --err: #ffb4a8;
  --line: rgba(217, 137, 74, 0.45);
  --focus: #fff4c8;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--fr4);
  color: var(--silk);
  font: 16px/1.45 ui-monospace, "Cascadia Mono", "SF Mono", Consolas, monospace;
}

body {
  max-width: none;
  margin: 0;
  padding: 1.25rem 1.5rem 4rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  background-image:
    linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent 12rem),
    repeating-linear-gradient(
      90deg,
      transparent 0,
      transparent 23px,
      rgba(124, 255, 178, 0.035) 24px
    );
}

.top {
  grid-column: 1 / -1;
}

.bus,
.serial,
.dock,
.recipe {
  margin-top: 0;
  border: 1px solid var(--line);
  padding: 1rem;
  background: var(--fr4-2);
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
}

.skip:focus {
  left: 1rem;
  top: 1rem;
  background: var(--silk);
  color: var(--fr4);
  padding: 0.5rem 0.75rem;
  z-index: 2;
}

.eyebrow {
  margin: 0;
  color: var(--copper);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.75rem;
}

.title-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  align-items: baseline;
  justify-content: space-between;
}

h1,
h2 {
  margin: 0.35rem 0;
  font-weight: 650;
  letter-spacing: -0.03em;
}

h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
}

h2 {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--silk-dim);
}

.lede,
.status,
.empty,
.recipe p {
  color: var(--silk-dim);
}

.status[data-state="live"] {
  color: var(--led);
}

.status[data-state="down"] {
  color: var(--err);
}

.bus-head,
.serial {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.bus-head {
  flex-direction: row;
  justify-content: space-between;
  align-items: baseline;
}

.trace {
  height: 6px;
  margin: 0.9rem 0 0.4rem;
  background: linear-gradient(90deg, var(--copper-2), var(--copper), var(--copper-2));
  border-radius: 99px;
  box-shadow: 0 0 0 3px rgba(163, 92, 40, 0.25);
}

.roster {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 0;
  padding: 0;
}

.roster:not(:empty) + .empty {
  display: none;
}

.device {
  min-height: 44px;
  min-width: 44px;
  border: 1px solid var(--copper);
  background: #0c1812;
  color: var(--silk);
  padding: 0.45rem 0.65rem;
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.device .addr {
  color: var(--copper);
  font-size: 0.75rem;
}

.device .meta {
  color: var(--silk-dim);
  font-size: 0.75rem;
}

.log {
  list-style: none;
  margin: 0.6rem 0 0;
  padding: 0;
  max-height: min(28rem, 55vh);
  overflow: auto;
}

.log li {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.85rem;
  padding: 0.45rem 0;
  border-bottom: 1px solid rgba(243, 237, 224, 0.08);
  word-break: break-word;
}

.log .when,
.log .who {
  color: var(--silk-dim);
  font-size: 0.8rem;
}

form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: end;
}

[hidden] {
  display: none !important;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  min-width: 10rem;
}

.field.grow {
  flex: 1 1 16rem;
}

label {
  color: var(--silk-dim);
  font-size: 0.8rem;
}

input,
select,
textarea,
button {
  font: inherit;
  color: var(--silk);
  background: #0c1812;
  border: 1px solid var(--copper-2);
  min-height: 44px;
  padding: 0.45rem 0.6rem;
}

textarea {
  resize: vertical;
  min-height: 5.5rem;
}

button {
  background: var(--copper);
  color: #1a0d06;
  border-color: var(--copper);
  cursor: pointer;
  font-weight: 700;
}

button:hover,
button:focus-visible {
  background: #f0a56a;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

.err {
  color: var(--err);
  margin: 0.6rem 0 0;
}

.recipe pre {
  overflow: auto;
  background: #0c1812;
  border: 1px solid var(--line);
  padding: 0.85rem;
  color: var(--silk);
  white-space: pre-wrap;
}

.say {
  flex-direction: column;
  align-items: stretch;
}

@media (min-width: 1100px) {
  body {
    grid-template-columns: minmax(0, 1.4fr) minmax(22rem, 0.75fr);
    align-items: start;
  }

  .bus,
  .serial,
  .dock {
    grid-column: 1;
  }

  .recipe {
    grid-column: 2;
    grid-row: 2 / span 4;
  }
}

@media (max-width: 720px) {
  body {
    padding-bottom: 6rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}