/* Общие стили для всех задач */

:root {
  --bg: #fafaf8;
  --card: #ffffff;
  --text: #1f1f1d;
  --muted: #6b6a65;
  --border: #dcdad3;
  --link: #185fa5;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1b1b1a;
    --card: #252524;
    --text: #ecebe6;
    --muted: #a3a29b;
    --border: #3d3d3a;
    --link: #85b7eb;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}

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

main { max-width: 960px; margin: 0 auto; padding: 24px 16px 48px; }
h1 { font-size: 26px; margin: 0 0 8px; }
h2 { font-size: 17px; margin: 0 0 12px; }
.task { color: var(--muted); margin: 0 0 24px; }
.muted { color: var(--muted); font-size: 14px; font-weight: normal; }
.back { display: inline-block; margin-bottom: 16px; font-size: 14px; }

.settings {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: flex-end;
  margin-bottom: 24px;
}
.settings label { display: flex; flex-direction: column; gap: 4px; font-size: 14px; color: var(--muted); }
.buttons { display: flex; gap: 8px; }

input, select, button {
  font: inherit;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
  height: 38px;
}
input[type="number"] { width: 120px; }
button { cursor: pointer; padding: 6px 18px; }
button:hover { border-color: var(--muted); }
button:disabled { opacity: .5; cursor: default; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}

/* Каталог задач на главной странице */
.problems { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.problems a { display: block; text-decoration: none; color: inherit; }
.problems a:hover .card { border-color: var(--muted); }
.problems h2 { color: var(--link); }
.problems p { margin: 0; color: var(--muted); }