:root {
  --bg: #0b1020;
  --panel: rgba(255, 255, 255, 0.08);
  --panel2: rgba(255, 255, 255, 0.12);
  --text: rgba(255, 255, 255, 0.97);
  --muted: rgba(255, 255, 255, 0.84);
  --placeholder: rgba(255, 255, 255, 0.62);
  --accent: #7c3aed;
  --ok: #16a34a;
  --bad: #ef4444;
  --shadow: rgba(0, 0, 0, 0.35);
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 20% 10%, rgba(124, 58, 237, 0.25), transparent 60%),
    radial-gradient(900px 500px at 80% 30%, rgba(14, 165, 233, 0.18), transparent 60%), var(--bg);
  color: var(--text);
}

#app {
  min-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 28px 14px;
}

.container {
  width: 980px;
  max-width: 100%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.04));
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 18px;
  box-shadow: 0 12px 34px var(--shadow);
  overflow: hidden;
}

.header {
  padding: 18px 18px 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.title {
  font-weight: 780;
  letter-spacing: 0.2px;
}

.lang {
  display: flex;
  align-items: center;
  gap: 8px;
}

.select {
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(0, 0, 0, 0.25);
  color: var(--text);
  padding: 8px 10px;
  outline: none;
}

.select option {
  background: var(--bg);
  color: var(--text);
}

.body {
  padding: 18px;
}

.panel {
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  padding: 16px;
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.col {
  flex: 1 1 320px;
}

.qr {
  margin-top: 6px;
  display: grid;
  gap: 8px;
  justify-items: start;
}

.qrImg {
  width: 220px;
  height: 220px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.35);
}

.muted {
  color: var(--muted);
}

.input {
  width: 100%;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(0, 0, 0, 0.25);
  color: var(--text);
  padding: 12px 12px;
  outline: none;
}

.input::placeholder {
  color: var(--placeholder);
}

.btns {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.btn {
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(0, 0, 0, 0.25);
  color: var(--text);
  border-radius: 12px;
  padding: 10px 12px;
  cursor: pointer;
  transition: transform 0.08s ease, background 0.12s ease;
  user-select: none;
}

.btn:hover {
  transform: translateY(-1px);
  background: rgba(0, 0, 0, 0.35);
}

.btn.primary {
  background: rgba(124, 58, 237, 0.28);
  border-color: rgba(124, 58, 237, 0.45);
}

.btn.primary:hover {
  background: rgba(124, 58, 237, 0.38);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.error {
  margin-top: 10px;
  color: #fecaca;
}

.hud {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  padding: 12px 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(0, 0, 0, 0.14);
}

.pill {
  background: var(--panel2);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  padding: 8px 10px;
  color: var(--text);
  font-size: 14px;
}

.question {
  font-size: 20px;
  line-height: 1.3;
  margin: 14px 0 12px;
}

.answers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

@media (max-width: 740px) {
  .answers {
    grid-template-columns: 1fr;
  }
}

.answer {
  display: flex;
  align-items: center;
  gap: 10px;
  text-align: left;
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(0, 0, 0, 0.22);
  color: var(--text);
  -webkit-text-fill-color: var(--text);
}

.answer * {
  color: inherit;
}

.answer.correct {
  border-color: rgba(22, 163, 74, 0.65);
  background: rgba(22, 163, 74, 0.24);
}

.answer.wrong {
  border-color: rgba(239, 68, 68, 0.75);
  background: rgba(239, 68, 68, 0.22);
}

.letter {
  width: 28px;
  height: 28px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-weight: 800;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.timer {
  width: 78px;
  height: 78px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  border: 2px solid rgba(255, 255, 255, 0.18);
  background: rgba(0, 0, 0, 0.22);
  font-weight: 850;
  font-size: 22px;
}

.timer.low {
  border-color: rgba(251, 191, 36, 0.85);
  box-shadow: 0 0 0 6px rgba(251, 191, 36, 0.12);
}

.toast {
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.toast.ok {
  border-color: rgba(22, 163, 74, 0.55);
}

.toast.bad {
  border-color: rgba(239, 68, 68, 0.6);
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  padding: 10px 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  text-align: left;
  font-size: 14px;
}

.table th {
  color: var(--muted);
  font-weight: 700;
}