:root {
  --cap-bg: #0c1220;
  --cap-surface: #141c2e;
  --cap-card: #1a2438;
  --cap-line: #2a3650;
  --cap-text: #e8edf5;
  --cap-muted: #94a3b8;
  --cap-accent: #f97316;
  --cap-accent-dim: #c2410c;
  --cap-easy: #22c55e;
  --cap-med: #eab308;
  --cap-hard: #f97316;
  --cap-core: #ef4444;
  --cap-radius: 14px;
  --cap-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  --cap-font: "Segoe UI", system-ui, -apple-system, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--cap-font);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--cap-text);
  background: var(--cap-bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(249, 115, 22, 0.12), transparent),
    linear-gradient(180deg, var(--cap-bg) 0%, #080d16 100%);
  min-height: 100vh;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--cap-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.cap-wrap {
  width: min(100% - 1.25rem, 720px);
  margin-inline: auto;
}

.cap-head {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(12, 18, 32, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--cap-line);
}

.cap-head-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.65rem 0;
  flex-wrap: wrap;
}

.cap-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: inherit;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.85rem;
}

.cap-brand img {
  width: 120px;
  height: auto;
  border-radius: 8px;
}

.cap-brand span { color: var(--cap-muted); font-weight: 400; }

.cap-head-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.cap-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.15rem;
  border: none;
  border-radius: 999px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}

.cap-btn:active { transform: scale(0.97); }

.cap-btn-play {
  background: linear-gradient(135deg, var(--cap-accent), var(--cap-accent-dim));
  color: #fff;
  box-shadow: 0 4px 18px rgba(249, 115, 22, 0.35);
}

.cap-btn-play:hover {
  box-shadow: 0 6px 24px rgba(249, 115, 22, 0.45);
}

.cap-btn-ghost {
  background: transparent;
  color: var(--cap-text);
  border: 1px solid var(--cap-line);
}

.cap-btn-lg { padding: 0.85rem 1.5rem; font-size: 1.05rem; }

.cap-burger {
  width: 44px;
  height: 44px;
  border: 1px solid var(--cap-line);
  border-radius: 10px;
  background: var(--cap-surface);
  color: var(--cap-text);
  font-size: 1.25rem;
  cursor: pointer;
}

.cap-nav {
  display: none;
  width: 100%;
  padding-bottom: 0.75rem;
}

.cap-nav.cap-open { display: block; }

.cap-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.25rem;
}

.cap-nav a {
  display: block;
  padding: 0.55rem 0.75rem;
  border-radius: 8px;
  color: var(--cap-muted);
  text-decoration: none;
}

.cap-nav a:hover {
  background: var(--cap-surface);
  color: var(--cap-text);
  text-decoration: none;
}

.cap-hero {
  padding: 1.75rem 0 2rem;
}

.cap-tag {
  display: inline-block;
  padding: 0.25rem 0.65rem;
  border-radius: 6px;
  background: rgba(249, 115, 22, 0.15);
  color: var(--cap-accent);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  margin-bottom: 0.75rem;
}

.cap-hero h1 {
  font-size: clamp(1.45rem, 5vw, 2rem);
  line-height: 1.25;
  margin: 0 0 0.85rem;
}

.cap-lead {
  color: var(--cap-muted);
  font-size: 1.02rem;
  margin: 0 0 1.25rem;
}

.cap-hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 1.5rem;
}

.cap-diff-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.65rem;
}

.cap-diff-card {
  background: var(--cap-card);
  border: 1px solid var(--cap-line);
  border-radius: var(--cap-radius);
  padding: 0.85rem;
  position: relative;
  overflow: hidden;
}

.cap-diff-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.cap-diff-easy::before { background: var(--cap-easy); }
.cap-diff-med::before { background: var(--cap-med); }
.cap-diff-hard::before { background: var(--cap-hard); }
.cap-diff-core::before { background: var(--cap-core); }

.cap-diff-card b {
  display: block;
  font-size: 0.95rem;
  margin-bottom: 0.2rem;
}

.cap-diff-card small {
  color: var(--cap-muted);
  font-size: 0.78rem;
}

.cap-section {
  padding: 1.5rem 0 2rem;
}

.cap-section h2 {
  font-size: 1.25rem;
  margin: 0 0 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--cap-line);
}

.cap-section h3 {
  font-size: 1.05rem;
  margin: 1.25rem 0 0.5rem;
  color: var(--cap-accent);
}

.cap-card {
  background: var(--cap-card);
  border: 1px solid var(--cap-line);
  border-radius: var(--cap-radius);
  padding: 1.15rem;
  margin-bottom: 1rem;
  box-shadow: var(--cap-shadow);
}

.cap-card p:last-child { margin-bottom: 0; }

.cap-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  margin: 0.75rem 0;
}

.cap-table th,
.cap-table td {
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--cap-line);
  text-align: left;
}

.cap-table th {
  background: var(--cap-surface);
  color: var(--cap-muted);
  font-weight: 600;
}

.cap-note {
  background: rgba(249, 115, 22, 0.08);
  border-left: 3px solid var(--cap-accent);
  padding: 0.75rem 1rem;
  border-radius: 0 8px 8px 0;
  font-size: 0.92rem;
  color: var(--cap-muted);
  margin-bottom: 1rem;
}

.cap-crumb {
  font-size: 0.85rem;
  color: var(--cap-muted);
  margin: 1rem 0 0.35rem;
}

.cap-page-title h1 {
  font-size: clamp(1.35rem, 4.5vw, 1.75rem);
  margin: 0 0 1rem;
}

.cap-cta-band {
  text-align: center;
  padding: 1.5rem;
  background: linear-gradient(135deg, rgba(249, 115, 22, 0.12), rgba(239, 68, 68, 0.08));
  border-radius: var(--cap-radius);
  border: 1px solid var(--cap-line);
  margin-top: 1.5rem;
}

.cap-foot {
  border-top: 1px solid var(--cap-line);
  padding: 1.5rem 0 2rem;
  margin-top: 1rem;
  font-size: 0.88rem;
  color: var(--cap-muted);
}

.cap-sitemap {
  margin-top: 0.75rem;
  line-height: 1.8;
}

.cap-sitemap a { margin-right: 0.15rem; }

.cap-list li { margin-bottom: 0.35rem; }

@media (min-width: 640px) {
  .cap-wrap { width: min(100% - 2rem, 860px); }

  .cap-burger { display: none; }

  .cap-nav {
    display: block !important;
    width: auto;
    padding: 0;
  }

  .cap-nav ul {
    display: flex;
    flex-wrap: wrap;
    gap: 0.15rem 0.5rem;
  }

  .cap-nav a { padding: 0.35rem 0.5rem; font-size: 0.88rem; }

  .cap-head-inner { flex-wrap: nowrap; }

  .cap-diff-grid { grid-template-columns: repeat(4, 1fr); }

  .cap-brand img { width: 160px; }
}

@media (min-width: 900px) {
  .cap-wrap { width: min(100% - 3rem, 960px); }

  .cap-hero { padding: 2.5rem 0 2.5rem; }
}