:root {
  --bg: #101727;
  --panel: #182235;
  --panel-soft: #22314c;
  --text: #eef4ff;
  --muted: #a9b7d1;
  --accent: #55d6be;
  --accent-2: #8ea8ff;
  --border: rgba(255, 255, 255, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: linear-gradient(135deg, #0f172a, #16233b);
  color: var(--text);
}

.page-shell {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px;
}

.hero {
  margin-bottom: 24px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.8rem;
}

h1, h2, h3 {
  margin-top: 0;
}

.subtitle,
.hint {
  color: var(--muted);
}

.top-links a {
  color: var(--accent-2);
  text-decoration: none;
  margin-right: 16px;
}

.grid {
  display: grid;
  gap: 16px;
}

.two-columns {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card {
  background: rgba(24, 34, 53, 0.92);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: 700;
}

select,
input,
button {
  width: 100%;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  font-size: 1rem;
}

select,
input {
  background: #fff;
  color: #111;
}

input {
  margin-bottom: 12px;
}

button {
  background: var(--accent);
  color: #07131b;
  font-weight: 700;
}

button[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
}

.button-row {
  display: grid;
  gap: 10px;
}

.top-gap {
  margin-top: 12px;
}

.hidden {
  display: none;
}

.secondary-btn {
  background: transparent;
  color: var(--text);
}

.mission-box {
  min-height: 92px;
  padding: 14px;
  border-radius: 12px;
  background: var(--panel-soft);
  border: 1px solid var(--border);
}

.mission-hidden {
  filter: blur(8px);
  user-select: none;
}

.list {
  margin: 0;
  padding-left: 18px;
}

.list li {
  margin-bottom: 8px;
}

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

.score-table th,
.score-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.score-table th {
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 640px) {
  .page-shell {
    padding: 16px;
  }
}