/* Нейтральная основа до сессии «Дизайн»: переменные, сетка CSS, без внешних шрифтов. */

:root {
  --color-bg: #f6f5f2;
  --color-surface: #ffffff;
  --color-text: #1d1f23;
  --color-muted: #5c6370;
  --color-line: #d9d6cf;
  --color-accent: #1f4e79;
  --color-accent-text: #ffffff;
  --color-ok: #1e6b3a;
  --color-warn: #8a5a00;
  --color-fail: #a12a2a;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Consolas, "Liberation Mono", monospace;
  --radius: 10px;
  --gap: 16px;
  --gap-large: 32px;
  --page-width: 1100px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #15171a;
    --color-surface: #1e2125;
    --color-text: #e8e6e1;
    --color-muted: #a3a9b3;
    --color-line: #353a41;
    --color-accent: #7fb0dc;
    --color-accent-text: #0f1215;
    --color-ok: #6fcf8e;
    --color-warn: #e3b25c;
    --color-fail: #f08a8a;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  background: var(--color-bg);
  color: var(--color-text);
  font: 16px/1.5 var(--font-body);
}

a { color: var(--color-accent); }

.top, .bottom, .page {
  width: 100%;
  max-width: var(--page-width);
  margin: 0 auto;
  padding: var(--gap);
}

.top {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
}

.brand {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: 0.02em;
}

.top-nav { display: flex; gap: var(--gap); align-items: center; }

.bottom { color: var(--color-muted); font-size: 0.875rem; }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: var(--gap-large);
}

.card.narrow { max-width: 560px; margin: var(--gap-large) auto; }
.card.wide { max-width: none; }

h1 { font-size: 1.5rem; line-height: 1.25; margin: 0 0 var(--gap); }

.muted { color: var(--color-muted); }
.small { font-size: 0.875rem; }

.badge, .step {
  display: inline-block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-muted);
  border: 1px solid var(--color-line);
  border-radius: 999px;
  padding: 2px 10px;
}

.form { display: grid; gap: var(--gap); margin: var(--gap) 0; }
.field { display: grid; gap: 6px; }
.field label { font-weight: 600; }
.field input {
  font: inherit;
  padding: 10px 12px;
  border: 1px solid var(--color-line);
  border-radius: 8px;
  background: var(--color-bg);
  color: var(--color-text);
}
.field input:focus { outline: 2px solid var(--color-accent); outline-offset: 1px; }
.help { margin: 0; font-size: 0.875rem; color: var(--color-muted); }
.error, .errors { color: var(--color-fail); margin: 0; }

.button {
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--color-accent);
  border-radius: 8px;
  padding: 10px 18px;
  background: var(--color-accent);
  color: var(--color-accent-text);
  justify-self: start;
}
.button.secondary { background: transparent; color: var(--color-accent); }
.button.small { padding: 4px 10px; font-size: 0.875rem; }
.button:disabled { opacity: 0.6; cursor: progress; }

.link {
  font: inherit;
  background: none;
  border: none;
  padding: 0;
  color: var(--color-accent);
  text-decoration: underline;
  cursor: pointer;
}
.inline { display: inline; }

.links { padding-left: 1.2em; display: grid; gap: 6px; }

.messages { list-style: none; padding: 0; margin: 0 0 var(--gap); display: grid; gap: 8px; }
.message { padding: 10px 14px; border-radius: 8px; border: 1px solid var(--color-line); background: var(--color-surface); }
.message-error { border-color: var(--color-fail); }
.message-success { border-color: var(--color-ok); }
.message-warning { border-color: var(--color-warn); }

.facts { display: grid; grid-template-columns: max-content 1fr; gap: 6px var(--gap); }
.facts dt { color: var(--color-muted); }
.facts dd { margin: 0; }

.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: 8px; border-bottom: 1px solid var(--color-line); }

.qr { max-width: 240px; background: #ffffff; padding: 8px; border-radius: 8px; }
.qr svg { width: 100%; height: auto; display: block; }

.secret, .codes code { font-family: var(--font-mono); letter-spacing: 0.04em; }
.codes { columns: 2; padding-left: 1.2em; }

.steps { padding-left: 1.2em; }

.call-grid { display: grid; grid-template-columns: minmax(220px, 280px) 1fr; gap: var(--gap-large); }
.jitsi-frame { min-height: 520px; border-radius: var(--radius); overflow: hidden; background: #000000; }

@media (max-width: 720px) {
  .card { padding: var(--gap); }
  .call-grid { grid-template-columns: 1fr; }
  .facts { grid-template-columns: 1fr; }
}

/* Проверка связи */
.checks { padding-left: 0; list-style: none; display: grid; gap: 8px; margin: var(--gap) 0; }
.checks li { position: relative; padding-left: 1.6em; color: var(--color-muted); }
.checks li::before { content: "·"; position: absolute; left: 0; }
.checks li[data-state="running"] { color: var(--color-text); }
.checks li[data-state="running"]::before { content: "…"; }
.checks li[data-state="ok"] { color: var(--color-text); }
.checks li[data-state="ok"]::before { content: "✓"; color: var(--color-ok); font-weight: 700; }
.checks li[data-state="fail"] { color: var(--color-text); }
.checks li[data-state="fail"]::before { content: "✗"; color: var(--color-fail); font-weight: 700; }
.summary { border-top: 1px solid var(--color-line); padding-top: var(--gap); }
.summary[data-state="ok"] .summary-text { color: var(--color-ok); font-weight: 600; }
.summary[data-state="warn"] .summary-text { color: var(--color-warn); font-weight: 600; }
.summary[data-state="fail"] .summary-text { color: var(--color-fail); font-weight: 600; }
.checks li[data-state="skip"]::before { content: "—"; }