* {
  box-sizing: border-box;
}

:root {
  --bg: #070b14;
  --card: rgba(18, 25, 42, 0.86);
  --card-light: rgba(255, 255, 255, 0.06);
  --border: rgba(255, 255, 255, 0.12);
  --text: #eef4ff;
  --muted: #95a3b8;
  --green: #32d583;
  --green-dark: #12b76a;
  --red: #ff5c7a;
  --blue: #5b8cff;
  --purple: #9b7cff;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 20%, rgba(91, 140, 255, 0.28), transparent 30%),
    radial-gradient(circle at 80% 10%, rgba(155, 124, 255, 0.25), transparent 28%),
    radial-gradient(circle at 50% 90%, rgba(50, 213, 131, 0.18), transparent 30%),
    var(--bg);
  display: grid;
  place-items: center;
}

.app {
  width: 100%;
  padding: 24px;
}

.card {
  max-width: 680px;
  margin: auto;
  padding: 34px;
  border-radius: 30px;
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(18px);
}

.badge {
  display: inline-block;
  margin: 0 0 14px;
  padding: 8px 13px;
  border-radius: 999px;
  background: rgba(50, 213, 131, 0.12);
  color: var(--green);
  font-weight: 800;
  font-size: 13px;
}

h1 {
  margin: 0;
  font-size: clamp(32px, 6vw, 48px);
  letter-spacing: -1.5px;
}

.subtitle {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.mode-selector {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 11px;
  margin-top: 24px;
}

.mode {
  margin: 0;
  padding: 13px 12px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--card-light);
  color: var(--text);
  cursor: pointer;
  font-weight: 800;
  transition: 0.2s ease;
}

.mode:hover {
  transform: translateY(-2px);
  border-color: rgba(91, 140, 255, 0.5);
}

.mode.active {
  background: linear-gradient(135deg, var(--blue), var(--purple));
  border-color: transparent;
  box-shadow: 0 12px 34px rgba(91, 140, 255, 0.32);
}

.quiz-box,
.result-box {
  margin-top: 24px;
  padding: 26px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid var(--border);
}

.hidden {
  display: none;
}

#progress {
  display: inline-block;
  margin: 0 0 14px;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(91, 140, 255, 0.13);
  color: #b9ccff;
  font-weight: 800;
}

#direction {
  margin: 0;
  color: var(--muted);
  font-weight: 800;
}

#word {
  margin: 10px 0 22px;
  font-size: clamp(34px, 8vw, 58px);
  letter-spacing: -1.2px;
}

input {
  width: 100%;
  padding: 17px 18px;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: rgba(7, 11, 20, 0.72);
  color: var(--text);
  font-size: 17px;
  outline: none;
}

input::placeholder {
  color: #637086;
}

input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(91, 140, 255, 0.16);
}

button {
  width: 100%;
  margin-top: 13px;
  padding: 15px;
  border: none;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--green), var(--green-dark));
  color: #04110b;
  font-size: 16px;
  font-weight: 900;
  cursor: pointer;
  transition: 0.2s ease;
}

button:hover {
  transform: translateY(-2px);
  filter: brightness(1.05);
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text);
  border: 1px solid var(--border);
}

#feedback {
  margin: 18px 0 0;
  font-size: 18px;
  font-weight: 900;
}

#solution {
  color: var(--muted);
  line-height: 1.5;
}

.score {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 18px;
}

.score span {
  padding: 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid var(--border);
  color: var(--muted);
}

.score strong {
  color: var(--text);
  font-size: 22px;
}

.result-box h2 {
  margin-top: 0;
  font-size: 32px;
}

.result-box h3 {
  margin-top: 24px;
  color: var(--text);
}

ul {
  list-style: none;
  padding: 0;
  margin: 12px 0;
}

li {
  display: flex;
  gap: 12px;
  padding: 14px;
  margin-bottom: 10px;
  border-radius: 16px;
  background: rgba(7, 11, 20, 0.45);
  border: 1px solid var(--border);
}

li strong {
  display: block;
  color: var(--text);
}

li small,
li em {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-style: normal;
}

.list-status {
  width: 28px;
  height: 28px;
  flex: 0 0 28px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 900;
}

.list-status.right {
  background: rgba(50, 213, 131, 0.15);
  color: var(--green);
}

.list-status.wrong {
  background: rgba(255, 92, 122, 0.15);
  color: var(--red);
}

@media (max-width: 620px) {
  .app {
    padding: 14px;
  }

  .card {
    padding: 22px;
    border-radius: 24px;
  }

  .mode-selector {
    grid-template-columns: 1fr;
  }

  .quiz-box,
  .result-box {
    padding: 20px;
  }

  .score {
    grid-template-columns: 1fr;
  }
}