:root {
  --bg: #050716;
  --bg-gradient: radial-gradient(circle at top, #34527f 0, #050716 45%, #000 100%);
  --card-bg: rgba(10, 13, 32, 0.97);
  --accent: #7afff1;
  --accent2: #ffd36b;
  --border: #263047;
  --text: #f6f7ff;
  --muted: #aab1d8;
  --correct: #32d47b;
  --wrong: #ff4d6a;
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.65);
  --radius-lg: 18px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg-gradient);
  min-height: 100vh;
  padding: 20px 12px 28px;
  color: var(--text);
  display: flex;
  justify-content: center;
}

.app {
  width: 100%;
  max-width: 1150px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 14px 16px;
}

.app-header {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.header-main {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-wrap {
  flex-shrink: 0;
}

.logo-img {
  width: 64px;
  height: 64px;
  object-fit: contain;
  filter: drop-shadow(0 0 16px rgba(0, 0, 0, 0.9));
}

.title-block h1 {
  margin: 0 0 4px;
  font-size: 2rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.title-block h1 span {
  color: var(--accent2);
}

.subtitle {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.header-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  margin-top: 4px;
}

.field {
  display: flex;
  align-items: center;
  gap: 6px;
}

.field label {
  font-size: 0.9rem;
  color: var(--muted);
}

.field select {
  background: #050814;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 10px;
  font-size: 0.9rem;
}

.field select:focus {
  outline: 1px solid var(--accent);
  box-shadow: 0 0 0 1px rgba(122, 255, 241, 0.6);
}

.btn {
  border-radius: 999px;
  border: 1px solid transparent;
  padding: 7px 16px;
  font-size: 0.9rem;
  cursor: pointer;
  background: #151a33;
  color: var(--text);
  transition:
    background 0.16s ease,
    transform 0.12s ease,
    box-shadow 0.18s ease;
}

.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #050814;
  font-weight: 600;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.75);
}

.btn.secondary {
  border-color: var(--border);
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.7);
}

.btn:active {
  transform: translateY(0);
  box-shadow: 0 7px 16px rgba(0, 0, 0, 0.55);
}

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 3px 8px;
  border-radius: 999px;
  border: 1px solid #313a5c;
  background: #050815;
  cursor: pointer;
  font-size: 0.7rem;
  color: var(--muted);
  transition:
    background 0.16s ease,
    transform 0.08s ease,
    box-shadow 0.16s ease;
}

.btn-icon:hover {
  background: #11162a;
  color: var(--text);
  box-shadow: 0 0 10px rgba(122, 255, 241, 0.5);
}

.btn-icon:active {
  transform: scale(0.96);
}

.main-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1.1fr);
  gap: 14px;
}

@media (max-width: 900px) {
  .main-layout {
    grid-template-columns: minmax(0, 1fr);
  }
}

.brief-card h2,
.race-card h2 {
  margin: 0 0 4px;
  font-size: 1.1rem;
}

.hint {
  margin: 0 0 8px;
  font-size: 0.8rem;
  color: var(--muted);
}

.hint.small {
  margin-top: 10px;
}

.brief-text {
  font-size: 0.95rem;
  line-height: 1.5;
  padding: 10px;
  border-radius: 12px;
  border: 1px solid #262b45;
  background: rgba(5, 8, 24, 0.9);
  max-height: 210px;
  overflow-y: auto;
}

.brief-focus {
  margin: 4px 0 0;
  padding-left: 18px;
  font-size: 0.85rem;
  color: var(--muted);
}

.brief-focus li + li {
  margin-top: 2px;
}

.race-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.hud {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  color: var(--muted);
}

.hud span {
  font-weight: 600;
  color: var(--text);
}

.steps-container {
  margin-top: 6px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.step-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
  padding: 7px 9px;
  border-radius: 12px;
  border: 1px solid #283354;
  background: #050815;
  font-size: 0.9rem;
  transition:
    border-color 0.16s ease,
    background 0.16s ease,
    box-shadow 0.16s ease,
    transform 0.08s ease;
}

.step-row.correct {
  border-color: var(--correct);
  background: #0f3a21;
  box-shadow: 0 0 16px rgba(50, 212, 123, 0.8);
}

.step-row.wrong {
  border-color: var(--wrong);
  background: #3a0714;
  box-shadow: 0 0 16px rgba(255, 77, 106, 0.7);
}

.step-index {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--accent2);
  min-width: 30px;
}

.step-text {
  font-size: 0.9rem;
}

.step-controls {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.controls-row {
  display: flex;
  justify-content: flex-end;
  margin-top: 6px;
}

.feedback {
  min-height: 22px;
  font-size: 0.85rem;
  margin-top: 4px;
  color: var(--muted);
}

.feedback.good {
  color: var(--correct);
}

.feedback.bad {
  color: var(--wrong);
}

.footer-card .hint {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
}