/* Folha de laboratório: papel quadriculado, cartões quadrados com margem colorida pelo resultado.
   Sem dependências externas (funciona offline). Claro por padrão, escuro conforme o sistema. */

:root {
  color-scheme: light dark;
  --paper: #edf1f6;
  --grid-line: rgba(21, 33, 59, 0.06);
  --sheet: #fbfcfe;
  --sheet-2: #f1f4f9;
  --ink: #15213b;
  --muted: #566681;
  --line: rgba(21, 33, 59, 0.18);
  --cobalt: #2b59d8;
  --ok: #0e7a5c;
  --bad: #b4233a;
  --warn: #a86400;
  --info: #2b59d8;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "Cascadia Code", "SF Mono", Consolas, Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0e1626;
    --grid-line: rgba(231, 237, 248, 0.05);
    --sheet: #152036;
    --sheet-2: #1b2944;
    --ink: #e7edf8;
    --muted: #98a8c4;
    --line: rgba(231, 237, 248, 0.2);
    --cobalt: #86a8ff;
    --ok: #4ade9a;
    --bad: #ff7a8a;
    --warn: #f2b544;
    --info: #86a8ff;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  font: 15px/1.55 var(--sans);
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 24px 24px;
}

code, .mono { font-family: var(--mono); font-size: 0.88em; }
code {
  padding: 0.05em 0.35em;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--sheet-2);
  word-break: break-word;
}

/* ---------- cabeçalho ---------- */
.top { max-width: 1240px; margin: 0 auto; padding: 32px 24px 8px; }
.top-inner { display: flex; flex-wrap: wrap; gap: 20px 32px; justify-content: space-between; align-items: flex-end; }
.title-block { flex: 1 1 420px; max-width: 720px; }
h1 { margin: 0 0 6px; font: 600 2rem/1.15 var(--serif); letter-spacing: -0.01em; }
.lead { margin: 0; color: var(--muted); max-width: 62ch; }
.status-block { display: flex; flex-direction: column; align-items: flex-end; gap: 12px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; justify-content: flex-end; }

.chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--sheet);
  font: 13px/1.3 var(--mono);
}
.chip::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--muted); }
.chip[data-tone="ok"]::before { background: var(--ok); }
.chip[data-tone="warn"]::before { background: var(--warn); }
.chip[data-tone="info"]::before { background: var(--info); }

.summary { margin: 18px 0 0; min-height: 1.5em; color: var(--muted); font-size: 14px; }
.summary strong { color: var(--ink); font-weight: 600; }

/* ---------- botões e campos ---------- */
.btn {
  appearance: none;
  padding: 8px 14px;
  border: 1.5px solid var(--ink);
  border-radius: 4px;
  background: transparent;
  color: var(--ink);
  font: 600 14px/1.2 var(--sans);
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s;
}
.btn:hover { background: var(--ink); color: var(--paper); }
.btn.primary { background: var(--ink); color: var(--paper); }
.btn.primary:hover { background: transparent; color: var(--ink); }
.btn:disabled { opacity: 0.55; cursor: progress; }
.btn.small { padding: 5px 10px; font-size: 13px; }
:focus-visible { outline: 3px solid var(--cobalt); outline-offset: 2px; }

label { display: block; margin: 0 0 4px; color: var(--muted); font-size: 13px; }
input[type="text"], input[type="number"], select, textarea {
  width: 100%;
  padding: 7px 9px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--sheet);
  color: var(--ink);
  font: 14px/1.4 var(--mono);
}
textarea { resize: vertical; min-height: 74px; }
input:focus, select:focus, textarea:focus { border-color: var(--cobalt); }
.check { display: flex; align-items: center; gap: 8px; margin: 0; color: var(--ink); font-size: 14px; }
.check input { width: 16px; height: 16px; }

/* ---------- grade e cartões ---------- */
main { max-width: 1240px; margin: 0 auto; padding: 8px 24px 24px; }
.section-title { margin: 28px 0 12px; font: 600 1.25rem/1.2 var(--serif); }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 330px), 1fr));
  gap: 18px;
  align-items: start;
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px 16px 58px;
  border: 1px solid var(--line);
  border-left: 6px solid var(--line);
  border-radius: 6px;
  background: var(--sheet);
  transition: border-left-color 0.25s;
}
.card[data-verdict="ok"]   { border-left-color: var(--ok); }
.card[data-verdict="bad"]  { border-left-color: var(--bad); }
.card[data-verdict="warn"] { border-left-color: var(--warn); }
.card[data-verdict="info"] { border-left-color: var(--info); }
.card.note { padding-bottom: 16px; }

@media (min-width: 960px) {
  .card.wide { grid-column: span 2; }
}

.card-head { display: flex; align-items: baseline; gap: 10px; }
.num {
  flex: none;
  min-width: 1.6em;
  font: 600 1.35rem/1 var(--serif);
  color: var(--muted);
}
.card h3 { flex: 1; margin: 0; font: 600 1.1rem/1.25 var(--serif); }
.tag { flex: none; color: var(--muted); font-size: 12.5px; }
.desc { margin: 0; color: var(--muted); font-size: 14px; }

.inputs { display: grid; gap: 10px; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 14px; }
.expect { color: var(--muted); font-size: 13px; }

.result { padding-top: 12px; border-top: 1px dashed var(--line); }
.verdict {
  display: inline-block;
  margin: 0 0 6px;
  padding: 1px 8px;
  border: 1.5px solid currentColor;
  border-radius: 3px;
  font: 700 12.5px/1.6 var(--sans);
  color: var(--muted);
}
.verdict[data-tone="ok"]   { color: var(--ok); }
.verdict[data-tone="bad"]  { color: var(--bad); }
.verdict[data-tone="warn"] { color: var(--warn); }
.verdict[data-tone="info"] { color: var(--info); }
.head { margin: 0 0 8px; font-weight: 600; }
.result.running .head { color: var(--muted); font-weight: 400; }

.facts { display: grid; grid-template-columns: max-content 1fr; gap: 3px 14px; margin: 0; font-size: 13.5px; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; font-family: var(--mono); font-size: 13px; word-break: break-word; }
.extra { margin-top: 10px; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.cmd {
  display: block; width: 100%;
  margin: 0; padding: 8px 10px;
  border: 1px solid var(--line); border-radius: 4px; background: var(--sheet-2);
  font: 12.5px/1.5 var(--mono);
  white-space: pre-wrap; word-break: break-all;
}

/* ---------- bolinha "i" ---------- */
.info {
  position: absolute; right: 14px; bottom: 14px;
  display: grid; place-items: center;
  width: 32px; height: 32px;
  padding: 0;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: transparent;
  color: var(--ink);
  font: italic 700 17px/1 var(--serif);
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s;
}
.info:hover, .info[aria-expanded="true"] { background: var(--ink); color: var(--paper); }

.explain { margin-top: 2px; padding: 12px 14px; border: 1px solid var(--line); border-radius: 4px; background: var(--sheet-2); font-size: 14px; }
.explain[hidden] { display: none; }
.explain h4 { margin: 0 0 6px; font: 600 0.95rem/1.3 var(--serif); }
.explain h4:not(:first-child) { margin-top: 12px; }
.explain p { margin: 0 0 8px; }
.steps { margin: 0; padding-left: 1.3em; }
.steps li { margin: 0 0 6px; }
.hint { color: var(--muted); }

/* ---------- simulador: a cadeia de IPs ---------- */
.sim-grid { display: grid; gap: 16px; }
@media (min-width: 720px) { .sim-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); } }
.sim-form { display: grid; gap: 10px; align-content: start; }
.sim-out { display: grid; gap: 12px; align-content: start; }
.chain-label { margin: 0 0 4px; color: var(--muted); font-size: 12.5px; }
.chain { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; min-height: 34px; }
.ip {
  padding: 3px 9px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--sheet);
  font: 13px/1.5 var(--mono);
}
.ip.pick { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.ip.dropped { text-decoration: line-through; opacity: 0.55; }
.ip.skipped { opacity: 0.6; border-style: dashed; }
.ip.append { border-style: dashed; color: var(--muted); }
.ip.empty { border-style: dashed; color: var(--muted); font-family: var(--sans); font-size: 13px; }
.sep { color: var(--muted); }
.final {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--line); border-left: 6px solid var(--line);
  border-radius: 4px; background: var(--sheet-2);
  font-weight: 600;
}
.final[data-tone="ok"] { border-left-color: var(--ok); }
.final[data-tone="bad"] { border-left-color: var(--bad); }

/* ---------- rate limit ---------- */
.dots { display: flex; flex-wrap: wrap; gap: 4px; }
.dot { width: 12px; height: 12px; border-radius: 2px; background: var(--line); }
.dot.ok { background: var(--ok); }
.dot.bad { background: var(--bad); }
.dot.other { background: var(--warn); }

/* ---------- tabela do guia ---------- */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { padding: 7px 10px; border: 1px solid var(--line); text-align: left; vertical-align: top; }
th { background: var(--sheet-2); font-weight: 600; }
td.good { color: var(--ok); font-weight: 600; }
td.stop { color: var(--bad); font-weight: 600; }
td.risk { color: var(--warn); font-weight: 600; }

/* ---------- rodapé e aviso ---------- */
.foot { max-width: 1240px; margin: 0 auto; padding: 8px 24px 40px; color: var(--muted); font-size: 13px; }
.foot p { max-width: 90ch; margin: 0 0 8px; }
.noscript { max-width: 1240px; margin: 0 auto; padding: 16px 24px; color: var(--bad); }

.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%);
  padding: 8px 16px;
  border-radius: 4px;
  background: var(--ink); color: var(--paper);
  font-size: 14px;
}
.toast[hidden] { display: none; }

@media (max-width: 640px) {
  .top { padding: 24px 16px 4px; }
  main, .foot { padding-left: 16px; padding-right: 16px; }
  h1 { font-size: 1.6rem; }
  .status-block { align-items: flex-start; width: 100%; }
  .chips { justify-content: flex-start; }
}

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