:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #1c2330;
  --muted: #5d6879;
  --border: #d9dee6;
  --primary: #1f5eff;
  --primary-text: #ffffff;
  --danger: #c62828;
  --warn-bg: #fff6df;
  --warn-border: #e8b547;
  --info-bg: #eaf1ff;
  --info-border: #8fb0ff;
  --error-bg: #fdecec;
  --error-border: #e57373;
  --ok-bg: #e8f6ec;
  --ok-border: #6cbf84;
  --radius: 10px;
  --focus: 0 0 0 3px rgba(31, 94, 255, .35);
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11151c;
    --surface: #1a2029;
    --text: #e6e9ef;
    --muted: #9aa5b5;
    --border: #2d3645;
    --primary: #6d95ff;
    --primary-text: #0b0f16;
    --danger: #ff7a7a;
    --warn-bg: #3a2f14;
    --warn-border: #a37f2c;
    --info-bg: #17264a;
    --info-border: #3f5fa8;
    --error-bg: #3d1a1a;
    --error-border: #a04545;
    --ok-bg: #173522;
    --ok-border: #3f8a57;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

h1, h2, h3 { line-height: 1.25; margin: 0 0 .6em; }
h1 { font-size: 1.75rem; }
h2 { font-size: 1.2rem; }
h3 { font-size: 1.05rem; }
h1:focus { outline: none; }
p { margin: 0 0 .8em; }
a { color: var(--primary); }
code, .mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .92em; }
.break { word-break: break-all; }

.container { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
.container.narrow { max-width: 720px; }
main.container { padding-top: 28px; padding-bottom: 64px; }

.topbar { background: var(--surface); border-bottom: 1px solid var(--border); padding: 12px 0; }
.brand { font-weight: 600; }

.row { display: flex; gap: 10px; align-items: center; }
.row.between { justify-content: space-between; }
.row.wrap { flex-wrap: wrap; }
.stack > * + * { margin-top: 16px; }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; margin-bottom: 16px; }

.lead { font-size: 1.1rem; color: var(--muted); }
.muted { color: var(--muted); }
.small { font-size: .875rem; }
.strong { font-weight: 600; }
.hint { color: var(--muted); font-size: .9rem; margin: .25em 0 .5em; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}
.card-action { display: flex; flex-direction: column; align-items: flex-start; }
.card-action p { flex: 1; }
details.card > summary { cursor: pointer; font-weight: 600; }
details.card[open] > summary { margin-bottom: 12px; }

fieldset { border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 20px; margin: 0; background: var(--surface); }
legend { font-weight: 600; padding: 0 6px; }
.field { margin-bottom: 14px; }
.field label { display: block; font-weight: 500; margin-bottom: 4px; }

input[type=text], input[type=email], input[type=password], input[type=tel], select, textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
}
input:focus, select:focus, textarea:focus, button:focus-visible, summary:focus-visible { outline: none; box-shadow: var(--focus); border-color: var(--primary); }
textarea { resize: vertical; }
.row select { width: auto; }

.check { display: flex; gap: 8px; align-items: flex-start; }
.check input { margin-top: 5px; }

.choices { display: grid; gap: 10px; }
.choice {
  display: flex; gap: 12px; align-items: flex-start;
  border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 14px; cursor: pointer;
}
.choice:has(input:checked) { border-color: var(--primary); box-shadow: var(--focus); }
.choice input { margin-top: 5px; }
.choice > span { display: flex; flex-direction: column; }

.btn {
  display: inline-block;
  padding: 9px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-weight: 500;
  cursor: pointer;
}
.btn:hover { border-color: var(--muted); }
.btn:disabled { opacity: .6; cursor: progress; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: var(--primary-text); }
.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-lg { padding: 12px 22px; font-size: 1.05rem; }
.btn-sm { padding: 5px 10px; font-size: .875rem; }
.link { background: none; border: 0; padding: 0; color: var(--primary); font: inherit; cursor: pointer; text-align: left; }
.link:hover { text-decoration: underline; }
.back { margin-bottom: 16px; }

.alert { border: 1px solid; border-radius: var(--radius); padding: 12px 16px; margin: 12px 0; }
.alert p:last-child { margin-bottom: 0; }
.alert-info { background: var(--info-bg); border-color: var(--info-border); }
.alert-warn { background: var(--warn-bg); border-color: var(--warn-border); }
.alert-error { background: var(--error-bg); border-color: var(--error-border); }
.alert-ok { background: var(--ok-bg); border-color: var(--ok-border); }

.badge {
  display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: .8rem; font-weight: 600;
  border: 1px solid var(--border); background: var(--bg); white-space: nowrap; margin: 2px 4px 2px 0;
}
.badge-recibida { background: var(--warn-bg); border-color: var(--warn-border); }
.badge-admitida, .badge-investigacion { background: var(--info-bg); border-color: var(--info-border); }
.badge-resuelta { background: var(--ok-bg); border-color: var(--ok-border); }
.badge-warn { background: var(--warn-bg); border-color: var(--warn-border); }
.badge-danger { background: var(--error-bg); border-color: var(--error-border); }

.token {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 1.35rem; letter-spacing: .04em; word-break: break-all;
  background: var(--bg); border: 1px dashed var(--border); border-radius: 8px; padding: 14px; user-select: all;
}
.token.small { font-size: 1rem; }
.token-card { text-align: left; }

.kv { display: grid; grid-template-columns: max-content 1fr; gap: 8px 18px; margin: 0; }
.kv dt { font-weight: 600; color: var(--muted); }
.kv dd { margin: 0; white-space: pre-wrap; overflow-wrap: anywhere; }
@media (max-width: 560px) { .kv { grid-template-columns: 1fr; } .kv dd { margin-bottom: 8px; } }

.deadlines { padding-left: 1.2em; margin: 0 0 16px; }

.thread { list-style: none; padding: 0; margin: 0 0 16px; display: flex; flex-direction: column; gap: 10px; }
.msg { max-width: 85%; padding: 10px 14px; border-radius: 12px; border: 1px solid var(--border); background: var(--surface); }
.msg-mine { align-self: flex-end; background: var(--info-bg); border-color: var(--info-border); }
.msg-meta { font-size: .8rem; color: var(--muted); margin-bottom: 4px; }
.msg-text { white-space: pre-wrap; overflow-wrap: anywhere; margin: 0; }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 24px; overflow-x: auto; }
.tab { background: none; border: 0; border-bottom: 3px solid transparent; padding: 10px 14px; font: inherit; color: var(--muted); cursor: pointer; white-space: nowrap; }
.tab.active { color: var(--text); border-bottom-color: var(--primary); font-weight: 600; }

.table-wrap { overflow-x: auto; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 16px; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }
tbody tr:last-child td { border-bottom: 0; }
tr.unread td:first-child { box-shadow: inset 3px 0 0 var(--primary); }
tr.late td { background: var(--error-bg); }
.register td { white-space: nowrap; }
.register td:nth-child(4) { white-space: normal; min-width: 160px; }

.danger-zone { border-color: var(--error-border); }
.privacy { font-size: .9rem; color: var(--muted); }

.kit { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 16px; }

@media print {
  @page { size: landscape; margin: 12mm; }
  .table-wrap { overflow: visible; border: 0; }
  table { font-size: 9pt; }
  .topbar, .tabs, .no-print, .alert, #fatal { display: none !important; }
  body { background: #fff; color: #000; }
  .kit { display: block; }
  .kit-share { page-break-after: always; border: 2px solid #000; }
}

@media (max-width: 600px) {
  .topbar .muted.small { display: none; }
  fieldset { padding: 12px; }
  .card { padding: 16px; }
  h1 { font-size: 1.5rem; }
  .msg { max-width: 100%; }
}