:root {
  --bg: #0c0d10;
  --panel: #14161b;
  --line: #24272f;
  --ink: #e8e9ec;
  --muted: #8b8f99;
  --accent: #c9a227;
  --error: #e2555c;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, monospace;
}

* { box-sizing: border-box; }

/* Атрибут hidden должен побеждать классы, задающие display (например .row с flex). */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

#app {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
}

.screen { width: 100%; max-width: 420px; }

h1 {
  margin: 0 0 8px;
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

h1 span {
  display: block;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
}

.hint { margin: 0 0 24px; color: var(--muted); font-size: 14px; }

.tabs { display: flex; gap: 4px; margin-bottom: 20px; border-bottom: 1px solid var(--line); }

.tab {
  appearance: none;
  background: none;
  border: 0;
  border-bottom: 2px solid transparent;
  color: var(--muted);
  padding: 10px 4px;
  margin-bottom: -1px;
  font: inherit;
  font-size: 14px;
  cursor: pointer;
}

.tab.active { color: var(--ink); border-bottom-color: var(--accent); }

label {
  display: block;
  margin-bottom: 14px;
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.02em;
}

input {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 11px 12px;
  background: var(--panel);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
  font-size: 15px;
}

input:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }

button[type="submit"] {
  width: 100%;
  margin-top: 6px;
  padding: 12px 16px;
  background: var(--accent);
  color: #16170f;
  border: 0;
  border-radius: 8px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

button[type="submit"]:hover { filter: brightness(1.08); }

.error { min-height: 20px; margin: 12px 0 0; color: var(--error); font-size: 14px; }

.bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.brand { font-family: var(--mono); font-size: 13px; letter-spacing: 0.18em; text-transform: uppercase; }
.brand em { color: var(--accent); font-style: normal; }
.spacer { flex: 1; }
.who { font-family: var(--mono); font-size: 13px; color: var(--muted); }

.ghost {
  appearance: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  padding: 7px 12px;
  font: inherit;
  font-size: 13px;
  cursor: pointer;
}

.ghost:hover { border-color: var(--accent); }

#home { max-width: 720px; }

.body { padding: 28px 0; }

.stage { margin: 0 0 6px; font-family: var(--mono); font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent); }
.stage-note { margin: 0 0 28px; color: var(--muted); font-size: 15px; max-width: 46ch; }

.facts { margin: 0; display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 10px; overflow: hidden; }
.facts > div { display: flex; justify-content: space-between; gap: 16px; padding: 12px 14px; background: var(--panel); }
.facts dt { color: var(--muted); font-size: 14px; }
.facts dd { margin: 0; font-family: var(--mono); font-size: 14px; }

@media (max-width: 520px) {
  #app { align-items: flex-start; padding: 20px 14px; }
  h1 { font-size: 24px; }
  .bar { flex-wrap: wrap; }
}

/* Страница самопроверки криптографии */
.selftest { width: 100%; max-width: 900px; }
.selftest h1 { font-size: 18px; margin: 0 0 12px; }
.selftest p { margin: 0 0 16px; font-size: 14px; color: var(--muted); }
.selftest pre {
  margin: 0;
  white-space: pre-wrap;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.65;
}
.good { color: #4caf7d; }
.bad { color: var(--error); }

/* Панели устройства, списка устройств, номера безопасности */
.card {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  padding: 18px;
  margin-bottom: 16px;
}

.card h2 {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.card .hint { margin: 0 0 4px; }

.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin-top: 12px; }
.row input { flex: 1 1 200px; min-width: 0; margin-top: 0; }

.primary {
  background: var(--accent);
  color: #16170f;
  border: 0;
  border-radius: 8px;
  padding: 10px 14px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.primary:hover { filter: brightness(1.08); }

.devices { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.devices li { border: 1px solid var(--line); border-radius: 10px; padding: 12px; }
.device-title { display: flex; gap: 10px; align-items: center; justify-content: space-between; font-size: 15px; }
.device-meta { font-family: var(--mono); font-size: 12px; color: var(--muted); margin-top: 4px; }
.device-actions { display: flex; gap: 8px; margin-top: 10px; }

.tag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: 999px;
  white-space: nowrap;
}

.tag.ok { color: #4caf7d; border: 1px solid #2f5b45; }
.tag.warn { color: var(--accent); border: 1px solid #5b4e21; }

.notice {
  margin: 16px 0 0;
  padding: 12px 14px;
  border: 1px solid #5b4e21;
  border-radius: 10px;
  background: #1a1710;
  color: var(--accent);
  font-size: 14px;
}

.safety { font-family: var(--mono); font-size: 14px; margin: 12px 0 0; white-space: pre-wrap; }

.ghost.danger:hover { border-color: var(--error); color: var(--error); }