:root {
  color-scheme: light dark;
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #1b1f24;
  --muted: #667085;
  --border: #e3e6eb;
  --accent: #2563eb;
  --accent-text: #ffffff;
  --danger: #c0392b;
  --ok: #1f9d55;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1216;
    --surface: #171b21;
    --text: #e6e9ee;
    --muted: #8b95a5;
    --border: #272d36;
    --accent: #5b8def;
    --accent-text: #0b1220;
    --danger: #ff7b6b;
    --ok: #46c27a;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.muted { color: var(--muted); }
.error { color: var(--danger); margin: 8px 0; }

/* кнопки */
.button, button.tab, button.link, button.crumb {
  font: inherit;
  cursor: pointer;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
}
.button:hover { border-color: var(--accent); }
.button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.button.ghost { background: transparent; }
.button.disabled, .button:disabled { opacity: 0.45; pointer-events: none; }

/* шапка */
.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 650; display: flex; align-items: center; gap: 8px; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--muted); }
.dot.on { background: var(--ok); }
.dot.off { background: var(--danger); }
.tabs { display: flex; gap: 4px; margin-left: 12px; flex: 1; }
.tab {
  padding: 6px 14px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
}
.tab.active { background: var(--bg); color: var(--text); font-weight: 600; }

main { padding: 20px; max-width: 1100px; margin: 0 auto; }

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}
.controls { justify-content: flex-start; }
.controls label { display: flex; align-items: center; gap: 6px; color: var(--muted); }
select {
  font: inherit;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
}

/* файлы */
.crumbs { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.crumb { padding: 2px 6px; border: 0; border-radius: 6px; background: transparent; color: var(--accent); }
.crumb.current { color: var(--text); font-weight: 600; }
button.crumb:hover { background: var(--border); }

.table-wrap { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; overflow-x: auto; }
table.files { width: 100%; border-collapse: collapse; }
table.files th, table.files td { padding: 9px 14px; text-align: left; border-bottom: 1px solid var(--border); }
table.files tbody tr:last-child td { border-bottom: 0; }
table.files th { font-weight: 600; color: var(--muted); font-size: 13px; }
table.files .num { text-align: right; white-space: nowrap; }
table.files .date { white-space: nowrap; color: var(--muted); }
button.link { padding: 0; border: 0; background: none; color: var(--text); text-align: left; }
button.link:hover { color: var(--accent); }
table.files a { color: var(--accent); text-decoration: none; }

/* экран */
.screen-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 240px;
  padding: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
}
#screen { max-width: 100%; height: auto; border-radius: 6px; }
#screen:fullscreen { background: #000; object-fit: contain; width: 100vw; height: 100vh; }

/* установка */
.card {
  max-width: 640px;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
}
.card h2 { margin: 0 0 4px; font-size: 20px; }
.steps { padding-left: 20px; line-height: 1.8; }
.warn { color: var(--danger); font-size: 14px; }
code { padding: 1px 6px; border-radius: 6px; background: var(--bg); font-size: 13px; }

/* вход */
.login-body { display: grid; place-items: center; min-height: 100vh; padding: 20px; }
.login-card {
  width: 100%;
  max-width: 360px;
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
}
.login-card h1 { margin: 0 0 4px; font-size: 24px; }
.login-card form { display: grid; gap: 14px; margin-top: 20px; }
.login-card label { display: grid; gap: 6px; color: var(--muted); font-size: 13px; }
.login-card input {
  font: inherit;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
}
.login-card input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.login-card .button { justify-content: center; }

@media (max-width: 640px) {
  .topbar { flex-wrap: wrap; padding: 10px 14px; }
  main { padding: 14px; }
  table.files .date { display: none; }
}