:root {
  --bg: #f5f6f8;
  --card: #fff;
  --text: #16181d;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-text: #fff;
  --border: #e5e7eb;
  --done: #9ca3af;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111317;
    --card: #1b1e24;
    --text: #e8eaed;
    --muted: #9aa0a6;
    --accent: #3b82f6;
    --border: #2c3038;
    --done: #6b7280;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.45;
}
a { color: var(--accent); }

/* ---------- главная: QR ---------- */
.qr-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3vh;
  padding: 3vh 16px;
  background: #fff;
  color: #000;
}
.qr-page img {
  width: min(58vh, 90vw);
  height: min(58vh, 90vw);
  image-rendering: pixelated;
}
.qr-page h1 {
  margin: 0;
  font-size: clamp(32px, 7vh, 96px);
  font-weight: 700;
  text-align: center;
}
.qr-page .session {
  max-width: 1400px;
  font-size: clamp(20px, 4vh, 52px);
  font-weight: 600;
  text-align: center;
  color: #1f6f43;
}
.qr-page .url { color: #555; font-size: clamp(14px, 2.5vh, 28px); }

/* ---------- общие ---------- */
.wrap { max-width: 720px; margin: 0 auto; padding: 20px 16px 48px; }
header.top {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  margin-bottom: 20px;
}
header.top h1 { font-size: 22px; margin: 0; }
.session-small { color: var(--muted); font-size: 14px; margin-bottom: 4px; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
}
label { display: block; font-weight: 600; margin: 14px 0 6px; }
label:first-child { margin-top: 0; }
label small { font-weight: 400; color: var(--muted); }
input, textarea, select {
  width: 100%;
  font: inherit;
  font-size: 16px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
}
textarea { min-height: 130px; resize: vertical; }
button, .btn {
  font: inherit;
  font-weight: 600;
  border: 0;
  border-radius: 10px;
  padding: 12px 18px;
  background: var(--accent);
  color: var(--accent-text);
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}
button.secondary, .btn.secondary {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--border);
}
button:disabled { opacity: .6; cursor: default; }
.submit { width: 100%; margin-top: 18px; font-size: 17px; }
.msg { margin-top: 12px; min-height: 1.4em; }
.msg.ok { color: #16a34a; }
.msg.err { color: #dc2626; }

/* ---------- список вопросов ---------- */
.toolbar { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 16px; align-items: center; }
.toolbar select { width: auto; flex: 1 1 180px; }
.toolbar label { display: flex; align-items: center; gap: 6px; margin: 0; font-weight: 400; }
.toolbar label input { width: auto; }
.q {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 12px;
}
.q .meta { color: var(--muted); font-size: 14px; display: flex; gap: 8px; flex-wrap: wrap; }
.q .to { color: var(--accent); font-weight: 700; }
.q .text { font-size: 19px; margin: 8px 0 12px; white-space: pre-wrap; word-break: break-word; }
.q .actions { display: flex; gap: 8px; flex-wrap: wrap; }
.q .actions button { padding: 8px 12px; font-size: 14px; }
.q.done .text, .q.done .to { color: var(--done); }
.q.done .text { text-decoration: line-through; }
.empty { text-align: center; color: var(--muted); padding: 40px 0; }
.count { color: var(--muted); font-size: 14px; }

/* ---------- режим «на экран» ---------- */
.spotlight {
  position: fixed; inset: 0; z-index: 10;
  background: var(--bg);
  display: flex; flex-direction: column; justify-content: center; align-items: center;
  padding: 5vh 6vw; text-align: center; gap: 4vh;
}
.spotlight[hidden] { display: none; }
.spotlight .to { color: var(--accent); font-size: clamp(22px, 4vh, 48px); font-weight: 700; }
.spotlight .text { font-size: clamp(28px, 6vh, 80px); font-weight: 600; white-space: pre-wrap; word-break: break-word; }
.spotlight .author { color: var(--muted); font-size: clamp(16px, 3vh, 32px); }
.spotlight .close { position: absolute; top: 16px; right: 16px; }