/* ===== BREADCRUMB ===== */
.breadcrumb {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--accent-purple); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span { color: var(--text-muted); }

/* ===== CHECKPOINT HEADER ===== */
.cp-header { margin-bottom: 3rem; }
.cp-week-number {
  font-size: clamp(4rem, 12vw, 7rem);
  font-weight: 800;
  line-height: 1;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: var(--accent-purple);
  margin-bottom: 0.5rem;
}
.cp-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  margin-bottom: 0.75rem;
}
.cp-title {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

/* ===== CONTENT SECTIONS ===== */
.cp-section {
  background: var(--bg-card);
  border: 1px solid var(--bg-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}
.cp-section h2 {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1rem;
}
.cp-section p { font-size: 0.9375rem; line-height: 1.75; }
.cp-section ul { display: flex; flex-direction: column; gap: 0.625rem; }
.cp-section li {
  font-size: 0.9375rem;
  line-height: 1.6;
  padding-left: 1.25rem;
  position: relative;
}
.cp-section li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent-purple);
}

/* ===== CODE BLOCK ===== */
.cp-code {
  background: #080810;
  border: 1px solid var(--bg-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  overflow-x: auto;
}
.cp-code-label {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent-purple);
  margin-bottom: 0.75rem;
}
.cp-code pre {
  margin: 0;
  font-family: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: #c9d1d9;
  white-space: pre;
}

/* ===== CHALLENGE BOX ===== */
.cp-challenge {
  border-left: 3px solid var(--accent-coral);
  padding-left: 1.25rem;
  margin-bottom: 1.5rem;
}
.cp-challenge h2 {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--accent-coral);
  margin-bottom: 0.5rem;
}
.cp-challenge p { font-size: 0.9375rem; line-height: 1.75; }

/* ===== NAV ARROWS ===== */
.cp-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--bg-border);
  flex-wrap: wrap;
  gap: 1rem;
}
.cp-nav a {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent-purple);
  transition: color var(--transition);
}
.cp-nav a:hover { color: var(--text-primary); }
.cp-nav .back-link { color: var(--text-muted); }
.cp-nav .back-link:hover { color: var(--text-primary); }