* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { min-width: 320px; }
button, input, textarea { font: inherit; }
button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 3px solid #1f5b4a;
  outline-offset: 2px;
}
.print-root { min-height: 100vh !important; }
.site-header-inner > :first-child { flex-shrink: 0; }
.step-nav { min-width: 0; }
.step-nav button { white-space: nowrap; }
.course-grid > * { min-width: 0; }
.cart-layout > :first-child,
.checkout-layout > :first-child { min-width: 0; }
.cart-item > :last-child { min-width: 0; }
.detail-dialog { max-width: 100%; }
.receipt-paper { max-width: 100%; }

@media (max-width: 1100px) {
  .site-header-inner { gap: 12px !important; padding: 12px 24px !important; }
  .step-nav { gap: 5px !important; }
  .step-nav button { padding: 0 10px !important; font-size: 12px !important; }
  .print-wrap { padding: 26px 24px 64px !important; }
  .hero-layout { grid-template-columns: 1fr !important; }
  .hero-card, .floor-panel { grid-column: auto !important; }
  .floor-panel { display: grid !important; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .floor-panel > :first-child { grid-column: 1 / -1; }
  .floor-panel button { min-width: 0; }
  .course-grid { grid-template-columns: repeat(3, minmax(0, 1fr)) !important; }
  .filters .filter-line { flex-wrap: wrap; }
  .course-search { width: min(100%, 360px) !important; }
  .cart-summary { width: 300px !important; }
  .checkout-form { width: 360px !important; }
}

@media (max-width: 760px) {
  .site-header-inner { flex-wrap: wrap; justify-content: space-between; }
  .step-nav { order: 3; flex: 0 0 100% !important; justify-content: stretch !important; }
  .step-nav button { flex: 1; justify-content: center; }
  .hero-card { padding: 32px !important; }
  .hero-card h1 { font-size: clamp(32px, 7vw, 52px) !important; }
  .hero-stats { flex-wrap: wrap; gap: 18px 28px !important; }
  .hero-stats > div { flex: 1 1 calc(50% - 28px); }
  .course-grid { grid-template-columns: repeat(2, minmax(0, 1fr)) !important; }
  .cart-layout, .checkout-layout { flex-direction: column !important; }
  .cart-layout > :first-child, .checkout-layout > :first-child { width: 100%; }
  .cart-summary, .checkout-form { position: static !important; width: 100% !important; }
  .receipt-toolbar { width: 100% !important; flex-wrap: wrap; }
  .receipt-paper { width: 100% !important; overflow-x: auto; padding: 28px !important; }
  .receipt-paper table { min-width: 590px; }
  .detail-overlay { padding: 16px !important; }
  .detail-dialog { width: 100% !important; max-height: calc(100dvh - 32px) !important; }
}

@media (max-width: 560px) {
  .site-header-inner { padding: 10px 16px !important; }
  .site-header-inner > :first-child > :first-child { width: 38px !important; height: 38px !important; }
  .site-header-inner > :first-child span:first-child { font-size: 18px !important; }
  .site-header-inner > button { height: 40px !important; padding: 0 10px !important; }
  .step-nav { gap: 4px !important; }
  .step-nav button { height: 38px !important; padding: 0 3px !important; font-size: 11px !important; }
  .step-nav button { white-space: normal; line-height: 1.2; }
  .print-wrap { padding: 18px 16px 54px !important; }
  .hero-layout { gap: 16px !important; }
  .hero-card { padding: 28px 22px !important; gap: 24px !important; }
  .hero-card h1 { font-size: 34px !important; }
  .hero-card p { font-size: 14px !important; }
  .hero-stats > div span:first-child { font-size: 28px !important; }
  .floor-panel { grid-template-columns: 1fr !important; padding: 16px !important; }
  .floor-panel > :first-child { grid-column: auto; }
  .floor-panel button { min-height: 48px !important; }
  .filters { padding: 14px !important; }
  .filters .filter-line { align-items: flex-start !important; gap: 8px !important; }
  .filters .filter-line > span { width: 100% !important; margin-left: 0 !important; }
  .filters .filter-line > div { flex-wrap: wrap; }
  .course-search { width: 100% !important; }
  .course-search input { min-width: 0; }
  .course-grid { grid-template-columns: 1fr !important; gap: 14px !important; }
  .cart-item { flex-direction: column !important; padding: 14px !important; }
  .cart-item > :first-child { width: 100% !important; min-height: 54px !important; flex-direction: row !important; align-items: center; }
  .cart-item > :last-child { width: 100%; }
  .cart-item > :last-child > :first-child { flex-wrap: wrap; }
  .cart-summary, .checkout-form { padding: 20px !important; }
  .fusion-grid, .school-contact-grid { grid-template-columns: 1fr !important; }
  .receipt-toolbar { gap: 8px !important; }
  .receipt-toolbar > span { flex-basis: 100%; }
  .receipt-toolbar button { flex: 1; padding: 0 8px !important; font-size: 12px !important; }
  .receipt-paper { padding: 20px 16px !important; }
  .receipt-paper h1 { font-size: 25px !important; }
  .detail-dialog > :first-child, .detail-dialog > :nth-child(2) { padding: 20px !important; }
  .detail-meta { grid-template-columns: 1fr !important; }
}

@media print {
  .print-root { min-height: 0 !important; }
  .receipt-paper { width: auto !important; max-width: none !important; overflow: visible; padding: 0 !important; }
  .receipt-paper table { min-width: 0; }
}

.forum-detail { overflow-wrap: anywhere; }
.forum-detail p, .forum-detail li { font-size: 14px; line-height: 1.85; }
.forum-detail ul { padding-left: 22px; }
.forum-detail h4 { font-size: 15px; margin-bottom: 8px; }
.forum-index { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px; margin-top: 16px; }
.forum-index article { border-top: 1px solid #DDD5C6; padding: 12px 0; min-width: 0; }
.forum-index h3 { font-size: 15px; }
.forum-index p { font-size: 13px; line-height: 1.8; }
.forum-index button { border: 1px solid #C9C0AE; border-radius: 6px; background: #F4EFE6; padding: 10px; }
@media (max-width: 560px) { .forum-index { grid-template-columns: 1fr; } .forum-update { padding: 16px !important; } }

.filters { scroll-margin-top: 160px; }