/* Public Protech pages. Builds on portal.css. */
.mk-head { position: relative; }
.mk-nav { display: flex; align-items: center; gap: 6px; }
.mk-nav a { text-decoration: none; color: var(--ink); font-size: 15px; padding: 10px 12px; border-radius: var(--radius-sm); }
.mk-nav a:hover { background: var(--surface); }
.mk-nav a[aria-current="page"] { color: var(--accent); font-weight: 600; }
.mk-nav .btn-primary, .mk-nav .btn-primary:hover { color: #fff; background: var(--ink); margin-left: 6px; }
.mk-menu { display: none; }
.mk-login { display: none; }
.mk-menu summary { list-style: none; cursor: pointer; min-height: 42px; padding: 0 16px; display: flex; align-items: center; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); font-size: 15px; }
.mk-menu summary::-webkit-details-marker { display: none; }
.mk-menu[open] summary { background: var(--ink); color: #fff; border-color: var(--ink); }
.mk-menu nav { position: absolute; left: 0; right: 0; top: 100%; z-index: 20; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 8px; display: grid; box-shadow: 0 18px 40px rgba(20, 35, 60, .12); }
.mk-menu nav a { min-height: 52px; display: flex; align-items: center; padding: 0 14px; font-size: 17px; text-decoration: none; color: var(--ink); border-bottom: 1px solid var(--line); }
.mk-menu nav a:last-child { border-bottom: 0; }
.mk-menu nav a.btn-primary { justify-content: center; color: #fff; margin-top: 8px; border-radius: var(--radius-sm); }

/* Hero with live 3D demo */
.mk-hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 48px; align-items: center; padding: 56px 0 40px; }
.mk-hero h1 { max-width: 14ch; }
.mk-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 26px; }
.demo { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; }
.demo-stage { position: relative; height: 420px; background: var(--stage); }
.demo-stage .stage-canvas { position: absolute; inset: 0; }
.demo-controls { display: grid; grid-template-columns: auto 1fr; gap: 14px 22px; align-items: center; padding: 16px 18px; border-top: 1px solid var(--line); }
.demo-controls h4 { margin: 0; font-size: 13px; font-weight: 600; color: var(--muted); }
.demo-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.demo-row input[type="range"] { flex: 1; min-width: 140px; margin: 0; }
.demo-caption { font-size: 13px; color: var(--muted); padding: 10px 2px 0; }
.demo-fallback { position: absolute; inset: 0; display: grid; place-items: center; padding: 24px; text-align: center; color: var(--muted); font-size: 14px; }

/* Sections */
.mk-section { padding: 64px 0; border-top: 1px solid var(--line); }
.mk-section .split { align-items: start; }
.mk-grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; }
.mk-grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; }
.mk-card { border-top: 1px solid var(--ink); padding-top: 14px; }
.mk-card h3 { margin-bottom: 8px; }
.mk-card p { color: var(--muted); margin: 0; font-size: 15px; }
.mk-feature-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 0; border-top: 1px solid var(--line); }
.mk-feature-list li { padding: 14px 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 200px 1fr; gap: 16px; }
.mk-feature-list strong { font-weight: 500; }
.mk-feature-list span { color: var(--muted); }
.mk-band { background: var(--ink); color: #fff; border-radius: var(--radius-lg); padding: 40px; display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; margin: 64px 0; }
.mk-band h2 { color: #fff; margin: 0 0 8px; }
.mk-band p { color: #cbd3df; margin: 0; max-width: 56ch; }
.mk-band .btn { background: #fff; color: var(--ink); border-color: #fff; font-weight: 600; }
.mk-band .btn.ghost { background: transparent; color: #fff; border-color: #ffffff66; }
.mk-tags { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.mk-tags img { border-radius: var(--radius-lg); border: 1px solid var(--line); width: 100%; background: var(--stage); }
.mk-tags figcaption { font-size: 14px; margin-top: 8px; }
.mk-tags figcaption span { display: block; font-size: 12px; color: var(--muted); }
.mk-faq details { border-bottom: 1px solid var(--line); padding: 16px 0; }
.mk-faq details:first-child { border-top: 1px solid var(--line); }
.mk-faq summary { cursor: pointer; font-size: 17px; font-weight: 500; min-height: 30px; }
.mk-faq details p { color: var(--muted); margin: 10px 0 0; max-width: 70ch; }
.page-intro { padding: 54px 0 34px; }
.prose { max-width: 72ch; }
.prose h2 { font-size: 24px; margin: 34px 0 10px; }
.prose p, .prose li { color: var(--graphite); }

/* Contact form */
.mk-form { display: grid; gap: 16px; max-width: 680px; }
.mk-form label:not(.check) { display: grid; gap: 6px; font-size: 14px; }
.mk-form input:not([type="checkbox"]), .mk-form textarea { width: 100%; min-height: 44px; padding: 10px 12px; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface); font-size: 16px; }
.mk-form textarea { resize: vertical; }
.mk-form fieldset { border: 0; padding: 0; margin: 0; display: flex; gap: 8px 20px; flex-wrap: wrap; }
.mk-form legend { font-size: 14px; margin-bottom: 8px; padding: 0; }
.mk-form .check input { accent-color: var(--accent); }
.mk-form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.mk-success { display: none; padding: 16px 18px; border-radius: var(--radius-sm); background: var(--accent-soft); }
.mk-success.show { display: block; }
.contact-card { border: 1px solid var(--line); background: var(--surface); border-radius: var(--radius-lg); padding: 24px; display: grid; gap: 10px; align-content: start; }
.contact-card a { font-size: inherit; overflow-wrap: anywhere; }

/* Protech × Aerotex logo row (About page, home page) */
.partners { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; margin: 0 0 26px; }
.partners .p-protech { width: 84px; height: 84px; }
.partners .p-x { font-size: 30px; line-height: 1; color: var(--muted); font-weight: 400; }
.partners .p-aerotex { height: 42px; width: auto; }
.partners.small { gap: 14px; margin: 18px 0 0; }
.partners.small .p-protech { width: 56px; height: 56px; }
.partners.small .p-x { font-size: 22px; }
.partners.small .p-aerotex { height: 28px; }

/* Footer */
.mk-foot { border-top: 1px solid var(--line); margin-top: 20px; }
.mk-foot-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 32px; padding: 36px 0 20px; }
.mk-foot-grid p { margin: 10px 0 0; color: var(--muted); font-size: 14px; }
.mk-foot-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 4px 24px; align-content: start; }
.mk-foot-links a { min-height: 36px; display: flex; align-items: center; color: var(--ink); text-decoration: none; font-size: 15px; }
.mk-foot-links a:hover { text-decoration: underline; text-underline-offset: 4px; }
.mk-foot-bottom { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding: 16px 0 36px; font-size: 13px; color: var(--muted); border-top: 1px solid var(--line); }

@media (max-width: 900px) {
  .mk-nav { display: none; }
  .mk-menu { display: block; }
  /* Keep Client login visible next to the menu on phones and tablets. */
  .mk-login { display: inline-flex; margin-left: auto; padding: 0 14px; white-space: nowrap; }
  .mk-head { gap: 10px; }
  .mk-hero { grid-template-columns: 1fr; gap: 28px; padding-top: 36px; }
  .mk-grid-3, .mk-grid-2, .mk-foot-grid { grid-template-columns: 1fr; }
  .demo-stage { height: 340px; }
}
@media (max-width: 560px) {
  /* Compact brand so logo, Client login and Menu fit on one row. */
  .mk-head .brand { gap: 8px; min-width: 0; }
  .mk-head .brand img { width: 36px; height: 36px; }
  .mk-head .brand strong { font-size: 12px; letter-spacing: .04em; line-height: 1.25; }
  .mk-head .brand > span > span { display: none; }
  .mk-login, .mk-menu summary { min-height: 38px; font-size: 14px; }
  .mk-section { padding: 46px 0; }
  .mk-feature-list li { grid-template-columns: 1fr; gap: 4px; }
  .mk-form-grid, .mk-tags { grid-template-columns: 1fr; }
  .mk-band { padding: 28px; }
  .demo-controls { grid-template-columns: 1fr; gap: 8px; }
  .demo-stage { height: 300px; }
}