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.button{cursor:pointer}.prevnext-nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.8rem;margin-top:1rem}.prevnext{display:flex;min-width:0;min-height:6.4rem;flex-direction:column;justify-content:center;padding:.9rem 1rem;border:1px solid var(--line);border-radius:12px}.prevnext:hover{border-color:var(--peach)}.prevnext small{color:var(--muted);font-size:.65rem}.prevnext strong{overflow-wrap:anywhere;font-size:.78rem}.prevnext span{margin-top:.3rem;color:var(--muted);font-size:.67rem;line-height:1.55}.prevnext.previous{grid-column:1}.prevnext.next{grid-column:2;text-align:right}.not-found{min-height:70vh;display:grid;place-content:center;justify-items:center;padding:2rem;text-align:center}.not-found>span{font-size:4rem}.footer{display:flex;justify-content:space-between;gap:1rem;margin-left:var(--sidebar);padding:2rem clamp(1.5rem,7vw,7rem);border-top:1px solid var(--line);color:var(--muted);font-size:.72rem}@container main (max-width:64rem){.course-grid { grid-template-columns: repeat(2, 1fr); }
  .hero { grid-template-columns: 1fr; }
  .hero-copy { max-width: 48rem; }
  .hero-visual { min-height: 23rem; }
  .mascot-card { width: min(21rem, 78%); }
}@container main (max-width:50rem){.hero { min-height: auto; padding: 3.5rem 1.35rem 4.5rem; }
  .hero-lead br { display: none; }
  .hero-meta { gap: .8rem; }
  .story, .curriculum { padding: 4rem 1.25rem; }
  .story-line { grid-template-columns: repeat(2, 1fr); gap: 1.4rem .5rem; }
  .story-line::before { display: none; }
  .section-heading.split { display: block; }
  .section-heading.split > p { margin-top: .8rem; }
  .lab-teaser { grid-template-columns: 1fr; margin: 0 1.25rem 4rem; padding: 1.5rem; }
  .section-page, .lesson { padding-top: 1.5rem; }
  .section-stat { display: none; }
  .lesson-list a { grid-template-columns: 2rem 1fr auto; gap: .6rem; }
  .lesson-time { display: none; }
  .lesson-check { grid-column: 3; grid-row: 1; }
  .lesson-arrow { grid-column: 3; grid-row: 1; }
  .lesson-list a.completed .lesson-arrow { display: none; }
  .finish-card { grid-template-columns: auto 1fr; }
  .lab-heading, .lab-control { align-items: stretch; flex-direction: column; }
  .lab-timer { flex-basis: auto; }
  .lab-actions .button { flex: 1; }
  .browser-terminal-screen { height: 60vh; }
  .lab-dialog-actions .button { flex: 1; }
  .complete-button { grid-column: 1 / -1; }
  .concept-diagram img { width: 48rem; max-width: none; }
  .concept-diagram.responsive-diagram img { width: 100%; max-width: 100%; }
  .concept-diagram .devops-loop-art { width: 100%; max-width: none; }
  .concept-diagram.wide { width: 100%; margin-inline: 0; transform: none; }
  .devops-stages { grid-template-columns: 1fr; }
  .devops-stages ol { grid-template-columns: 1fr; }
}@container main (max-width:38rem){.hero h1 { font-size: clamp(1.8rem, 8cqi, 3rem); }
  .section-heading h2, .lab-teaser h2 { font-size: clamp(1.55rem, 6.8cqi, 2rem); }
  .section-hero h1, .lesson-header h1 { font-size: clamp(1.5rem, 7.5cqi, 2.5rem); }
  .course-grid { grid-template-columns: 1fr; }
  .course-card a { min-height: 14rem; }
}@media(max-width:800px){:root{--topbar:3.8rem}.topbar{gap:.75rem;padding:0 .85rem}.topbar-copy,.topbar-start{display:none}.nav-button{display:flex;flex-direction:column;justify-content:center;gap:4px;width:2.75rem;height:2.75rem;padding:.7rem;cursor:pointer}.nav-button>span[aria-hidden=true]{width:1.25rem;height:2px;border-radius:2px;background:var(--ink)}.sidebar{transform:translateX(-105%);width:min(19rem,88vw);box-shadow:15px 0 40px rgba(48,36,42,.16);transition:transform .22s ease}.sidebar.is-open{transform:translateX(0)}.main,.footer{width:100%;margin-left:0}}@media(max-width:520px){body{font-size:.98rem}.brand{font-size:.95rem}.hero-visual{min-height:20rem}.speech{right:-.5rem}.plate{width:2.9rem;height:2.9rem}.hero-meta{display:grid;grid-template-columns:repeat(3,1fr)}.section-hero{padding:1.3rem}.lesson-body table{white-space:nowrap}.prevnext-nav{gap:.55rem}.prevnext{min-height:7rem;padding:.8rem}.footer{display:grid}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation-duration:.01ms!important;transition-duration:.01ms!important}}