:root {
  --bg: #f4f3ef;
  --panel: #ffffff;
  --fg: #1c1c1e;
  --muted: #5f5f66;
  --line: #d6d4cc;
  --accent: #1f5fc8;        /* заливка кнопки: белый текст 5.9:1 */
  --accent-fg: #ffffff;
  --focus: #1f5fc8;
  --ok: #1a7a43;
  --err: #b42318;
  --busy: #8a5a00;
  --warn-bg: #fff3d1;
  --warn-line: #d9a930;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141518;
    --panel: #1c1e22;
    --fg: #e8e8ea;
    --muted: #a3a4ab;
    --line: #34373d;
    --accent: #7aa7ff;      /* заливка кнопки: тёмный текст 7.6:1 */
    --accent-fg: #0d1626;
    --focus: #7aa7ff;
    --ok: #5cc98a;
    --err: #ff7b6e;
    --busy: #e3b341;
    --warn-bg: #352b12;
    --warn-line: #8f6d1c;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.sr-only {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip-path: inset(50%); white-space: nowrap;
}
.offscreen { position: fixed; top: 0; left: -9999px; opacity: 0; }

button {
  font: inherit;
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--fg);
  cursor: pointer;
}
button:hover { border-color: var(--muted); }
button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}
button.ghost { background: transparent; }

/* ---------- страница заметки ---------- */
body.app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  padding: 12px max(16px, env(safe-area-inset-right)) max(10px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));
  gap: 10px;
}
.bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 16px;
}
.bar h1 { font-size: 17px; margin: 0; font-weight: 650; }
.status { font-size: 14px; font-weight: 400; color: var(--muted); }
.status[data-kind="ok"] { color: var(--ok); }
.status[data-kind="err"] { color: var(--err); }
.status[data-kind="busy"] { color: var(--busy); }
.tools { display: flex; flex-wrap: wrap; gap: 8px; }
.tools form { margin: 0; }

.conflict {
  background: var(--warn-bg);
  border: 1px solid var(--warn-line);
  border-radius: 10px;
  padding: 10px 12px;
}
.conflict p { margin: 0 0 8px; font-weight: 600; }

.sheet { flex: 1; min-height: 0; display: flex; }
#notes {
  flex: 1;
  width: 100%;
  min-height: 180px;
  resize: none;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  color: var(--fg);
  font: 15px/1.55 ui-monospace, "Cascadia Mono", Consolas, "Liberation Mono", monospace;
  tab-size: 4;
}
#notes::placeholder { color: var(--muted); opacity: 1; }
#notes:disabled { opacity: .6; }

.foot {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  color: var(--muted);
}

@media (max-width: 600px) {
  body.app { padding-top: 10px; gap: 8px; }
  .bar h1 { font-size: 16px; }
  .tools button { padding: 0 12px; }
  #notes { font-size: 16px; padding: 12px; }   /* 16px — iOS не зумит поле при фокусе */
  .foot span + span { display: none; }
}

/* ---------- вход ---------- */
body.login {
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  place-items: start center;
  padding: 12vh 16px 24px;
}
.card {
  width: 100%;
  max-width: 360px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 24px 22px;
}
.card h1 { font-size: 20px; margin: 0 0 18px; }
.card form { display: flex; flex-direction: column; gap: 8px; }
.card label { font-weight: 600; }
.card input[type="password"], .card input[type="text"] {
  font: inherit;
  font-size: 16px;
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: var(--fg);
}
.card .check { font-weight: 400; display: flex; align-items: center; gap: 8px; color: var(--muted); }
.card .check input { width: 18px; height: 18px; margin: 0; }
.msg { margin: 4px 0 0; color: var(--err); font-weight: 600; }
.msg:empty { display: none; }
.card button[type="submit"] {
  margin-top: 8px;
  min-height: 44px;
  border: 0;
  background: var(--accent);
  color: var(--accent-fg);
  font-weight: 650;
}
.card button[type="submit"]:hover { filter: brightness(1.08); }