/* Cobalt: cool white and ink, a blue backlit LCD like the Rossum's. */
:root {
  --bg: #f4f6fb;
  --fg: #121826;
  --muted: #5b6579;
  --card: #ffffff;
  --line: #d6dcea;
  --accent: #2346c8;
  --on-accent: #ffffff;
  --lcd-bg: #2340c4;
  --lcd-fg: #eef2ff;
  --good: #1f7a4d;
  --bad: #b3261e;
  --warn-bg: #fff6dc;
  --warn-line: #d9a21b;
  --danger: #c41a1a;
  --danger-bg: #ffe8e6;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d111a;
    --fg: #e5e9f2;
    --muted: #8d97aa;
    --card: #151b27;
    --line: #253046;
    --accent: #86a2ff;
    --on-accent: #0b1020;
    --lcd-bg: #2a47d0;
    --lcd-fg: #eef2ff;
    --good: #5fd39a;
    --bad: #ff7b72;
    --warn-bg: #2a2410;
    --warn-line: #b8891a;
    --danger: #ff5a52;
    --danger-bg: #3a1312;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif;
}
main, .hero, footer { max-width: 44rem; margin: 0 auto; padding: 0 16px; }
code { font-family: var(--mono); font-size: 0.9em; }
a { color: var(--accent); }

.hero { padding-top: 4rem; padding-bottom: 2rem; }
.hero h1 { font-family: var(--mono); font-size: 2.4rem; margin: 0 0 0.25rem; letter-spacing: -0.02em; }
.lede { color: var(--muted); margin: 0 0 1.5rem; }
.hero nav { display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; font-size: 0.95rem; }

.lcd {
  display: inline-flex;
  flex-direction: column;
  padding: 0.6rem 0.9rem;
  border-radius: 6px;
  background: var(--lcd-bg);
  color: var(--lcd-fg);
  font: 600 1.05rem/1.35 var(--mono);
  white-space: pre;
  box-shadow: inset 0 0 0 3px rgb(0 0 0 / 0.15);
}
.lcd span { width: 16ch; }

section { padding: 2rem 0; border-top: 1px solid var(--line); scroll-margin-top: 1rem; }
h2 { font-size: 1.35rem; margin: 0 0 0.75rem; }

.warning {
  background: var(--warn-bg);
  border: 1px solid var(--warn-line);
  border-left-width: 5px;
  border-radius: 6px;
  padding: 1.25rem 1.25rem 0.5rem;
  margin: 2rem 0;
}

.lcd-figure { margin: 0.5rem 0 1.25rem; }
.lcd-big { font-size: clamp(0.95rem, 4.6vw, 1.5rem); padding: 0.8rem 1.1rem; }
.fields { display: grid; grid-template-columns: max-content 1fr; gap: 0.5rem 1rem; align-items: baseline; }
.fields dt { text-align: right; }
.fields dd { margin: 0; }

.states { display: grid; grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr)); gap: 1rem; }
.state {
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--card);
}
.state .lcd { font-size: 0.95rem; }
.state h4 { margin: 0.75rem 0 0.25rem; font-size: 1rem; }
.state p { margin: 0; font-size: 0.95rem; }

.warning h3 { margin-top: 1.25rem; }
.warning ul { padding-left: 1.2rem; }
.warning li { margin-bottom: 0.5rem; }
.responsibility { font-weight: 600; padding-top: 0.75rem; border-top: 1px solid var(--warn-line); }
.steps { padding-left: 1.4rem; }
.steps li { margin-bottom: 0.4rem; }
h3 { font-size: 1.05rem; margin: 1.75rem 0 0.5rem; }

kbd {
  font: 600 0.8em var(--mono);
  padding: 0.1em 0.45em;
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 4px;
  background: var(--card);
}
.screen {
  font: 600 0.85em var(--mono);
  padding: 0.05em 0.4em;
  border-radius: 3px;
  background: var(--lcd-bg);
  color: var(--lcd-fg);
}
.trouble dt { margin-top: 0.75rem; font-weight: 600; }
.trouble dd { margin: 0.2rem 0 0 1.2rem; }
.trouble .danger {
  margin: 1rem 0;
  padding: 0.9rem 1.1rem;
  border: 2px solid var(--danger);
  border-left-width: 8px;
  border-radius: 6px;
  background: var(--danger-bg);
}
.trouble .danger dt { margin-top: 0; color: var(--danger); }
.trouble .danger dd { margin-left: 0; margin-top: 0.4rem; }
.trouble .danger strong { color: var(--danger); font-size: 1.1em; }
.danger-icon { font-size: 1.2em; }
.note { margin-top: 1.5rem; padding: 0.75rem 1rem; border-left: 4px solid var(--warn-line); background: var(--warn-bg); border-radius: 4px; }

.drop {
  margin-top: 1.5rem;
  padding: 2.25rem 1rem;
  border: 2px dashed var(--line);
  border-radius: 10px;
  background: var(--card);
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.drop:hover, .drop:focus-visible, .drop.over { border-color: var(--accent); outline: none; }
.drop.over { background: color-mix(in srgb, var(--accent) 8%, var(--card)); }
.drop-main { margin: 0; font-weight: 600; }
.drop-hint { margin: 0.35rem 0 0; color: var(--muted); font-size: 0.9rem; }

.result {
  margin-top: 1rem;
  padding: 1rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--card);
}
.result dl { display: grid; grid-template-columns: max-content 1fr; gap: 0.2rem 1rem; margin: 0; }
.result dt { color: var(--muted); }
.result dd { margin: 0; overflow-wrap: anywhere; }
#r-out { margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--line); }
.msg { margin: 0.75rem 0 0; }
.msg:empty { display: none; }
.msg.error, .bad { color: var(--bad); font-weight: 600; }
.msg.good, .ok { color: var(--good); font-weight: 600; }

.button {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.6rem 1.1rem;
  border-radius: 8px;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 600;
  text-decoration: none;
}
.button { border: 2px solid var(--accent); font: inherit; font-weight: 600; cursor: pointer; }
.button:hover:not(:disabled) { filter: brightness(1.1); }
.button:disabled { opacity: 0.4; cursor: not-allowed; }
.button.secondary { background: transparent; color: var(--accent); }
.downloads { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center; margin-top: 0.25rem; }
.downloads .button { margin-top: 0.5rem; }
.ack { display: flex; gap: 0.6rem; align-items: flex-start; margin-top: 1rem; font-weight: 600; cursor: pointer; }
.ack input { width: 1.15rem; height: 1.15rem; margin-top: 0.2rem; flex: none; accent-color: var(--accent); }

footer { padding-top: 1.5rem; padding-bottom: 3rem; color: var(--muted); font-size: 0.9rem; border-top: 1px solid var(--line); }