:root {
  --bg: #0b0f16;
  --bg-soft: #111725;
  --card: #141b2b;
  --card-2: #182136;
  --line: #24304a;
  --text: #e8edf7;
  --muted: #8e9ab4;
  --accent: #4d8dff;
  --accent-soft: rgba(77, 141, 255, 0.14);
  --ok: #35c98b;
  --bad: #ff5f6d;
  --warn: #ffb547;
  --radius: 16px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(1100px 600px at 15% -10%, rgba(77, 141, 255, 0.16), transparent 60%),
    radial-gradient(900px 500px at 95% 0%, rgba(53, 201, 139, 0.10), transparent 55%),
    var(--bg);
  color: var(--text);
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 860px; margin: 0 auto; padding: 32px 20px 80px; }
.screen[hidden] { display: none !important; }

.brand { display: flex; align-items: center; gap: 12px; margin-bottom: 28px; }
.brand .logo {
  width: 38px; height: 38px; border-radius: 11px; flex: none;
  background: linear-gradient(135deg, var(--accent), #7b5cff);
  display: grid; place-items: center; font-weight: 700; color: #fff; font-size: 17px;
}
.brand .name { font-weight: 650; letter-spacing: -0.2px; }
.brand .sub { color: var(--muted); font-size: 13px; }

.card {
  background: linear-gradient(180deg, var(--card), var(--card-2));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}

h1 { font-size: 27px; line-height: 1.25; margin: 0 0 10px; letter-spacing: -0.5px; }
h2 { font-size: 20px; margin: 0 0 14px; letter-spacing: -0.3px; }
p.lead { color: var(--muted); margin: 0 0 22px; }

.rules { list-style: none; padding: 0; margin: 0 0 26px; display: grid; gap: 10px; }
.rules li {
  display: flex; gap: 12px; align-items: flex-start;
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; font-size: 15px;
}
.rules li b { color: var(--text); font-weight: 600; }
.rules .ic { flex: none; width: 22px; text-align: center; }

label { display: block; font-size: 13px; color: var(--muted); margin: 0 0 6px; }
.field { margin-bottom: 16px; }
input[type="text"] {
  width: 100%; padding: 13px 15px; font-size: 16px; color: var(--text);
  background: rgba(0, 0, 0, 0.28); border: 1px solid var(--line); border-radius: 12px; outline: none;
  transition: border-color .15s, box-shadow .15s;
}
input[type="text"]:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

button {
  font: inherit; cursor: pointer; border: none; border-radius: 12px;
  padding: 14px 22px; font-weight: 600; color: #fff;
  background: linear-gradient(135deg, var(--accent), #3f6fe0);
  transition: transform .08s, filter .15s, opacity .15s;
}
button:hover { filter: brightness(1.08); }
button:active { transform: translateY(1px); }
button:disabled { opacity: .45; cursor: not-allowed; }
button.ghost { background: transparent; border: 1px solid var(--line); color: var(--text); }
.btn-row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }

.err { color: var(--bad); font-size: 14px; min-height: 20px; margin-top: 10px; }

/* ---- вопрос ---- */
.qhead { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 14px; }
.qcount { font-size: 14px; color: var(--muted); }
.qcount b { color: var(--text); font-size: 16px; }

.timer { display: flex; align-items: center; gap: 10px; font-variant-numeric: tabular-nums; }
.timer .dial { position: relative; width: 44px; height: 44px; }
.timer svg { transform: rotate(-90deg); display: block; }
.timer .val {
  position: absolute; inset: 0; display: grid; place-items: center;
  font-size: 13px; font-weight: 700;
}
.timer.low .val { color: var(--warn); }
.timer.crit .val { color: var(--bad); }

.progress { height: 5px; border-radius: 99px; background: rgba(255,255,255,0.07); overflow: hidden; margin-bottom: 22px; }
.progress i { display: block; height: 100%; background: linear-gradient(90deg, var(--accent), #7b5cff); transition: width .35s ease; }

.topic {
  display: inline-block; font-size: 12px; letter-spacing: .3px; text-transform: uppercase;
  color: #9ab6ff; background: var(--accent-soft); border: 1px solid rgba(77,141,255,.25);
  padding: 5px 10px; border-radius: 99px; margin-bottom: 14px;
}
.qtext { font-size: 18px; line-height: 1.5; margin: 0 0 20px; }

.options { display: grid; gap: 10px; }
.opt {
  display: flex; gap: 13px; align-items: flex-start; text-align: left; width: 100%;
  background: rgba(255,255,255,0.028); border: 1px solid var(--line); border-radius: 13px;
  padding: 15px 16px; color: var(--text); font-weight: 400; line-height: 1.45;
  transition: border-color .12s, background .12s, transform .08s;
}
.opt:hover { border-color: #3b4d75; background: rgba(255,255,255,0.05); }
.opt .letter {
  flex: none; width: 27px; height: 27px; border-radius: 8px; display: grid; place-items: center;
  background: rgba(255,255,255,0.07); font-size: 13px; font-weight: 700; color: var(--muted);
}
.opt.sel { border-color: var(--accent); background: var(--accent-soft); }
.opt.sel .letter { background: var(--accent); color: #fff; }

.qfoot { display: flex; justify-content: space-between; align-items: center; gap: 14px; margin-top: 22px; flex-wrap: wrap; }
.hint { color: var(--muted); font-size: 13px; }

/* ---- результат ---- */
.verdict { text-align: center; padding: 8px 0 4px; }
.score-big { font-size: 60px; font-weight: 700; letter-spacing: -2px; line-height: 1; }
.score-big span { color: var(--muted); font-size: 26px; font-weight: 600; letter-spacing: -1px; }
.badge {
  display: inline-block; margin-top: 14px; padding: 9px 18px; border-radius: 99px;
  font-weight: 650; font-size: 15px;
}
.badge.ok { background: rgba(53,201,139,.14); color: var(--ok); border: 1px solid rgba(53,201,139,.3); }
.badge.bad { background: rgba(255,95,109,.13); color: var(--bad); border: 1px solid rgba(255,95,109,.3); }
.meta { color: var(--muted); font-size: 14px; margin-top: 12px; }

.review { display: grid; gap: 12px; margin-top: 26px; }
.rev {
  border: 1px solid var(--line); border-radius: 14px; overflow: hidden;
  background: rgba(255,255,255,0.022);
}
.rev-head {
  display: flex; gap: 12px; align-items: flex-start; padding: 14px 16px; cursor: pointer; user-select: none;
}
.rev-head .mark {
  flex: none; width: 24px; height: 24px; border-radius: 7px; display: grid; place-items: center;
  font-size: 14px; font-weight: 700;
}
.rev.ok .mark { background: rgba(53,201,139,.16); color: var(--ok); }
.rev.bad .mark { background: rgba(255,95,109,.15); color: var(--bad); }
.rev-title { flex: 1; font-size: 15px; line-height: 1.45; }
.rev-title small { display: block; color: var(--muted); font-size: 12.5px; margin-top: 3px; }
.rev-head .chev { color: var(--muted); flex: none; transition: transform .15s; }
.rev.open .chev { transform: rotate(90deg); }
.rev-body { display: none; padding: 0 16px 16px 52px; }
.rev.open .rev-body { display: block; }
.rev-opt { padding: 9px 12px; border-radius: 10px; font-size: 14.5px; line-height: 1.45; margin-bottom: 6px; border: 1px solid transparent; }
.rev-opt.correct { background: rgba(53,201,139,.10); border-color: rgba(53,201,139,.3); }
.rev-opt.chosen-wrong { background: rgba(255,95,109,.10); border-color: rgba(255,95,109,.3); }
.rev-opt b { font-weight: 700; margin-right: 6px; }
.rev-opt .tag { float: right; font-size: 11.5px; text-transform: uppercase; letter-spacing: .4px; opacity: .85; }
.expl {
  margin-top: 12px; padding: 12px 14px; border-radius: 11px;
  background: rgba(77,141,255,.08); border: 1px solid rgba(77,141,255,.22);
  font-size: 14.5px; line-height: 1.55; color: #cddcff;
}
.expl b { color: #fff; }

/* ---- админка ---- */
table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
th, td { padding: 11px 12px; text-align: left; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; font-size: 12.5px; text-transform: uppercase; letter-spacing: .4px; }
tr:last-child td { border-bottom: none; }
.pill { display: inline-block; padding: 3px 10px; border-radius: 99px; font-size: 12.5px; font-weight: 600; }
.pill.ok { background: rgba(53,201,139,.14); color: var(--ok); }
.pill.bad { background: rgba(255,95,109,.13); color: var(--bad); }
.pill.wait { background: rgba(142,154,180,.14); color: var(--muted); }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 22px; }
.stat { background: rgba(255,255,255,0.03); border: 1px solid var(--line); border-radius: 13px; padding: 15px; }
.stat .v { font-size: 26px; font-weight: 700; letter-spacing: -.5px; }
.stat .k { color: var(--muted); font-size: 13px; margin-top: 2px; }
.tablewrap { overflow-x: auto; }

@media (max-width: 620px) {
  .wrap { padding: 22px 14px 60px; }
  .card { padding: 20px 17px; }
  h1 { font-size: 23px; }
  .qtext { font-size: 17px; }
  .score-big { font-size: 48px; }
  .rev-body { padding-left: 16px; }
}