:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1e325c;
  --muted: #6b7690;
  --border: #c3c8d4;
  --primary: #1c58d9;
  --primary-dark: #1648b5;
  --danger: #d24b4e;
  --danger-bg: #fdeeee;
  --ok: #3db887;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1520;
    --card: #1a2232;
    --text: #e8edf5;
    --muted: #8f9bb3;
    --border: #3a475e;
    --primary: #3b73f0;
    --primary-dark: #5a8bf5;
    --danger: #ff7b7e;
    --danger-bg: #3a1f26;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Open Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.page {
  min-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px;
  background:
    radial-gradient(900px 500px at 15% -10%, color-mix(in srgb, var(--primary) 14%, transparent), transparent 70%),
    radial-gradient(700px 400px at 100% 110%, color-mix(in srgb, var(--primary) 10%, transparent), transparent 70%);
}

.sr {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

/* карточка */
.login {
  margin: auto;
  width: 100%;
  max-width: 400px;
  padding: 40px 32px 28px;
  background: var(--card);
  border: 1px solid rgba(0, 0, 0, .08);
  border-radius: 8px;
  box-shadow: 0 20px 32px rgba(0, 0, 0, .12);
  text-align: center;
  animation: appear .45s ease-out both;
}

@keyframes appear {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: none; }
}

.shake { animation: shake .4s; }
@keyframes shake {
  20%, 60% { transform: translateX(-6px); }
  40%, 80% { transform: translateX(6px); }
}

.logo { display: block; width: 56px; height: 56px; margin: 0 auto 16px; }
h1 { margin: 0 0 24px; font-size: 20px; font-weight: 600; }

/* ошибка */
.alert {
  margin: 0 0 16px;
  padding: 10px 14px;
  font-size: 14px;
  text-align: left;
  color: var(--danger);
  background: var(--danger-bg);
  border: 1px solid color-mix(in srgb, var(--danger) 45%, transparent);
  border-radius: 4px;
}
.alert[hidden] { display: none; }

/* форма */
form { display: grid; gap: 16px; text-align: left; }
.field { position: relative; display: block; }

input {
  width: 100%;
  height: 48px;
  padding: 0 16px;
  font: inherit;
  font-size: 16px;
  color: var(--text);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 4px;
  transition: border-color .15s, box-shadow .15s;
}
input::placeholder { color: var(--muted); }
input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 1px var(--primary);
}
#password { padding-right: 48px; }

.eye {
  position: absolute; top: 0; right: 0;
  width: 48px; height: 48px;
  display: grid; place-items: center;
  color: var(--muted); background: none; border: 0; cursor: pointer;
}
.eye:hover, .eye[aria-pressed="true"] { color: var(--primary); }

button { font: inherit; }

.primary {
  height: 48px;
  padding: 0 24px;
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  background: var(--primary);
  border: 0;
  border-radius: 4px;
  cursor: pointer;
  transition: background .15s;
}
.primary:hover:not(:disabled) { background: var(--primary-dark); }
.primary:disabled { opacity: .65; cursor: default; }
.primary.busy { cursor: progress; }
.primary:focus-visible, .link:focus-visible, .eye:focus-visible {
  outline: 2px solid var(--primary); outline-offset: 2px;
}

.link {
  padding: 0;
  font-size: 14px;
  color: var(--primary);
  background: none;
  border: 0;
  cursor: pointer;
  text-decoration: none;
}
.link:hover { text-decoration: underline; }
.login > .link { margin-top: 20px; }

/* подвал */
footer {
  width: 100%;
  max-width: 820px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 24px;
  padding-top: 16px;
  font-size: 13px;
  color: var(--muted);
}
footer nav { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.status { display: inline-flex; align-items: center; gap: 8px; }
.status i {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 0 color-mix(in srgb, var(--ok) 60%, transparent);
  animation: pulse 2.4s infinite;
}
.status.down i { background: var(--danger); animation: none; }
@keyframes pulse {
  70%  { box-shadow: 0 0 0 7px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

/* диалоги */
dialog {
  width: min(420px, calc(100% - 32px));
  padding: 28px;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, .25);
}
dialog::backdrop { background: rgba(10, 15, 25, .55); }
dialog h2 { margin: 0 0 16px; font-size: 18px; }
dialog p { margin: 0 0 20px; font-size: 14px; line-height: 1.6; }
dialog a { color: var(--primary); }
dl {
  display: grid; grid-template-columns: auto 1fr; gap: 10px 16px;
  margin: 0 0 24px; font-size: 14px;
}
dt { color: var(--muted); }
dd { margin: 0; }
dialog .primary { width: 100%; }

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

/* страница документа (политика конфиденциальности) */
body.doc { height: auto; }
.paper {
  margin: 24px auto;
  width: 100%;
  max-width: 760px;
  padding: 32px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  line-height: 1.65;
  font-size: 15px;
}
.paper h1 { margin: 16px 0 4px; font-size: 26px; }
.paper h2 { margin: 28px 0 8px; font-size: 17px; }
.paper a { color: var(--primary); }
.paper ul { padding-left: 20px; }
.paper li { margin-bottom: 6px; }
.paper code { padding: 1px 6px; background: var(--bg); border-radius: 4px; }
.paper dl { margin: 0; }
.muted { color: var(--muted); margin: 0; }