/*
 * The same visual language as web/index.html: a document, not an application
 * chrome. Palette, type stack and the mono marginalia are taken from there
 * unchanged, so the two pages read as one project.
 */

:root {
  --paper:      #f2f4f6;
  --paper-sunk: #e7ebef;
  --ink:        #16202b;
  --ink-soft:   #5a6875;
  --rule:       #c9d2da;
  --signal:     #a8323a;
  --signal-bg:  #f6e8e9;
  --hold:       #2e5f7a;
  --hold-bg:    #e4edf2;

  --serif: "Iowan Old Style", "Charter", "Palatino Linotype", "Palatino",
           ui-serif, Georgia, "Times New Roman", serif;
  --mono:  ui-monospace, "SF Mono", "SFMono-Regular", Menlo, Consolas,
           "Liberation Mono", monospace;

  --measure: 34rem;
  --rail: 11rem;
  --gap: clamp(2.5rem, 6vw, 4.5rem);
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper:      #0e151c;
    --paper-sunk: #141d26;
    --ink:        #dfe6ec;
    --ink-soft:   #8a99a7;
    --rule:       #2a3743;
    --signal:     #e2848b;
    --signal-bg:  #2a1a1d;
    --hold:       #8fc0da;
    --hold-bg:    #16252e;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
}

.sheet {
  max-width: 62rem;
  margin: 0 auto;
  padding: clamp(2rem, 5vw, 4rem) clamp(1.25rem, 4vw, 3rem) 5rem;
}

.record {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.75rem 1.5rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--ink);
}
.record__name {
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 600;
  margin: 0;
}
.record__meta {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin-left: auto;
  font-variant-numeric: tabular-nums;
}

.notice {
  margin-top: 2.2rem;
  max-width: var(--measure);
  background: var(--signal-bg);
  border-left: 3px solid var(--signal);
  padding: 1.1rem 1.3rem;
}
.notice__label {
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--signal);
  font-weight: 600;
  display: block;
  margin-bottom: 0.5rem;
}
.notice p { margin: 0; font-size: 1rem; }
.notice p + p { margin-top: 0.6rem; }

.block {
  display: grid;
  gap: 0 2.5rem;
  margin-top: var(--gap);
  align-items: start;
}
@media (min-width: 62rem) {
  .block { grid-template-columns: var(--rail) minmax(0, 1fr); }
}
.block__note {
  font-family: var(--mono);
  font-size: 0.7rem;
  line-height: 1.55;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding-top: 0.45rem;
  border-top: 1px solid var(--rule);
  margin-bottom: 1rem;
}
@media (min-width: 62rem) {
  .block__note { margin-bottom: 0; text-align: right; border-top-color: var(--ink); }
}
.block__body { max-width: var(--measure); min-width: 0; }
.block__body > * + * { margin-top: 1.1rem; }
.block__body p { margin: 0; }

h2 {
  font-size: 1.5rem;
  line-height: 1.25;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0;
  text-wrap: balance;
}
h3 {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  margin: 0 0 0.5rem;
}

.is-hidden { display: none; }

.muted { color: var(--ink-soft); font-size: 0.9375rem; }

/* Controls. Rectangular and flat, so nothing looks more finished than it is. */
.row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 0.75rem;
}
.field { display: block; flex: 1 1 14rem; min-width: 0; }
.field--grow { flex: 1 1 20rem; }
.field__label {
  display: block;
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 0.35rem;
}

input[type="text"],
textarea {
  width: 100%;
  background: var(--paper-sunk);
  border: 1px solid var(--rule);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.8125rem;
  line-height: 1.6;
  padding: 0.55rem 0.7rem;
  border-radius: 0;
  resize: vertical;
}
input[type="text"]:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--hold);
  outline-offset: 1px;
}
textarea[readonly] { color: var(--ink-soft); }

.button {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--ink);
  padding: 0.6rem 1.1rem;
  cursor: pointer;
  border-radius: 0;
}
.button:hover:not(:disabled) { background: var(--hold-bg); }
.button:focus-visible { outline: 2px solid var(--hold); outline-offset: 2px; }
.button:disabled { opacity: 0.4; cursor: not-allowed; }
.button--primary { border-color: var(--hold); color: var(--hold); }

.status {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  min-height: 1.2em;
}
.status--live { color: var(--hold); }
.status--fail { color: var(--signal); }

.split {
  display: grid;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
@media (min-width: 40rem) {
  .split { grid-template-columns: 1fr 1fr; }
}
.split__col { background: var(--paper); padding: 1.2rem 1.3rem 1.4rem; }
.split__col > * + * { margin-top: 0.8rem; }

.fingerprint {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 0.9rem;
}
.fingerprint__label {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.fingerprint code {
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  word-break: break-all;
  background: var(--paper-sunk);
  padding: 0.15em 0.4em;
}

.verify {
  border: 1px solid var(--ink);
  padding: 1.1rem 1.2rem;
}
.verify > * + * { margin-top: 0.7rem; }
.verify__rule {
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.35;
  text-wrap: balance;
}

/* The transcript. Deliberately a ledger rather than speech bubbles: this is a
   record of what was sent, not a simulation of a conversation. */
.log {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 1px solid var(--rule);
  background: var(--paper-sunk);
  max-height: 24rem;
  overflow-y: auto;
}
.log:empty { display: none; }
.log li {
  display: grid;
  grid-template-columns: 5.5rem minmax(0, 1fr);
  gap: 0 1rem;
  padding: 0.55rem 0.9rem;
  font-size: 0.9375rem;
}
.log li + li { border-top: 1px solid var(--rule); }
.log__who {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding-top: 0.3em;
}
.log__text { white-space: pre-wrap; overflow-wrap: anywhere; }
.log li[data-kind="out"] .log__who { color: var(--hold); }
.log li[data-kind="fail"] { background: var(--signal-bg); }
.log li[data-kind="fail"] .log__who { color: var(--signal); }

a { color: inherit; text-decoration-color: var(--rule); text-underline-offset: 0.18em; }
a:hover { text-decoration-color: currentColor; }
a:focus-visible { outline: 2px solid var(--hold); outline-offset: 3px; }

.colophon {
  margin-top: var(--gap);
  padding-top: 1.1rem;
  border-top: 1px solid var(--ink);
  font-family: var(--mono);
  font-size: 0.7rem;
  line-height: 1.7;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
  display: grid;
  gap: 0.9rem;
}
@media (min-width: 44rem) {
  .colophon { grid-template-columns: 1fr auto; align-items: start; }
}
.colophon a { text-decoration-color: var(--ink-soft); }

/* Die Bridge-Adresse von Hand zu setzen ist ein Sonderfall (eigene Bruecke,
   Fehlersuche). Sie bleibt erreichbar, aber sie soll niemandem im Weg stehen,
   der nur schreiben will. */
.advanced {
  margin-top: 0.75rem;
}

.advanced > summary {
  cursor: pointer;
  color: var(--ink-soft);
  font-size: 0.875rem;
}

.advanced > summary:hover {
  color: inherit;
}

.advanced[open] > summary {
  margin-bottom: 0.75rem;
}