@font-face{font-family:'IBM Plex Sans';font-style:normal;font-weight:400 600;font-display:swap;src:url(/assets/fonts/IBMPlexSans-var.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;}
@font-face{font-family:'Source Serif 4';font-style:normal;font-weight:400 600;font-display:swap;src:url(/assets/fonts/SourceSerif4-var.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;}
/* Walls Aircraft — site styles. Palette comes from the logo (#224185) and the Walls email signature (#16243D, #8C6D2F).
   Look: navy frames, full-width aircraft photography, serif display type, sentence case, brass as the single accent. */
:root {
  --ink: #16243d;
  --deep: #101b2f;
  --blue: #224185;
  --brass: #8c6d2f;
  --brass-light: #d9c49b;
  --paper: #ffffff;
  --mist: #eef1f5;
  --text: #263246;
  --slate: #5a6473;
  --rule: #d9dee6;
  --on-dark: #c9d0dc;
  --on-dark-muted: #9fa9b9;
  --focus: #224185;
  --serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --sans: 'IBM Plex Sans', 'Helvetica Neue', Arial, sans-serif;
  --wrap: 1240px;
  --gutter: clamp(16px, 4vw, 40px);
  --section: clamp(64px, 9vw, 120px);
  --header: 76px;
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 140px; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font: 400 17px/1.6 var(--sans);
  font-kerning: normal;
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; height: auto; }
a { color: var(--blue); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; }

h1, h2, h3 { color: var(--ink); margin: 0; }
h1, h2 { font-family: var(--serif); font-weight: 600; font-optical-sizing: auto; letter-spacing: -0.015em; }
h1 { font-size: clamp(38px, 5.4vw, 68px); line-height: 1.04; }
h2 { font-size: clamp(30px, 3.6vw, 46px); line-height: 1.1; }
h3 { font: 600 19px/1.35 var(--sans); }
p { margin: 0 0 1em; max-width: 68ch; }
.lede { font-size: 20px; line-height: 1.55; color: var(--text); max-width: 60ch; }
.muted { color: var(--slate); }
.small { font-size: 14px; line-height: 1.55; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }
.section { padding: var(--section) 0; }
.section + .section { padding-top: 0; }
.band { background: var(--mist); }
.band + .section, .section + .band, .section + .section.dark { padding-top: var(--section); }
.dark { background: var(--ink); color: var(--on-dark); --focus: #ffffff; }
.dark h1, .dark h2, .dark h3 { color: #ffffff; }
.dark a { color: #ffffff; }
.dark .muted, .dark .lede { color: var(--on-dark); }

.skip { position: absolute; left: -9999px; top: 0; background: var(--paper); color: var(--ink); padding: 10px 16px; z-index: 50; }
.skip:focus { left: 16px; top: 12px; }

/* Header: navy on every page */
.site-header { position: sticky; top: 0; z-index: 20; background: var(--deep); border-bottom: 1px solid rgba(255,255,255,.08); --focus: #fff; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: var(--header); }
.brand { display: block; width: 228px; flex: none; }
.brand img { width: 100%; height: auto; }
.nav { display: flex; align-items: center; gap: 24px; }
.nav a { color: #e7ebf2; text-decoration: none; font-size: 15px; font-weight: 500; padding: 6px 0; border-bottom: 2px solid transparent; }
.nav a:hover, .nav a[aria-current="page"] { color: #fff; border-bottom-color: var(--brass-light); }
.nav .call { color: var(--brass-light); font-weight: 600; font-variant-numeric: tabular-nums; }
.menu { display: none; }
.menu summary { list-style: none; cursor: pointer; font: 600 15px/1 var(--sans); color: #fff; padding: 10px 14px; border: 1px solid rgba(255,255,255,.4); border-radius: 2px; }
.menu summary::-webkit-details-marker { display: none; }

@media (max-width: 1100px) {
  .brand { width: 180px; }
  .nav { display: none; }
  .menu { display: block; }
  .menu[open] .menu-panel { position: absolute; left: 0; right: 0; top: 100%; background: var(--deep); border-bottom: 1px solid rgba(255,255,255,.12); padding: 8px var(--gutter) 20px; }
  .menu-panel a { display: block; padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,.1); color: #e7ebf2; text-decoration: none; font-weight: 500; }
  .menu-panel a[aria-current="page"] { color: #fff; }
  .menu-panel a:last-child { border-bottom: 0; color: var(--brass-light); font-weight: 600; }
}

/* Buttons */
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.btn { display: inline-block; font: 600 15px/1 var(--sans); padding: 15px 22px; border-radius: 2px; text-decoration: none; border: 1px solid var(--blue); background: var(--blue); color: #fff; }
.btn:hover { background: var(--ink); border-color: var(--ink); text-decoration: none; }
.btn.line { background: transparent; color: var(--blue); }
.btn.line:hover { background: var(--blue); color: #fff; }
.dark .btn { background: #fff; color: var(--ink); border-color: #fff; }
.dark .btn:hover { background: transparent; color: #fff; }
.dark .btn.line { background: transparent; color: #fff; border-color: rgba(255,255,255,.55); }
.dark .btn.line:hover { border-color: #fff; background: rgba(255,255,255,.08); }

/* Home hero: headline on navy, then the aircraft full width with the listing ribbon across it */
.hero-text { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: clamp(28px, 5vw, 72px); align-items: end; padding-top: clamp(48px, 7vw, 96px); padding-bottom: clamp(36px, 5vw, 64px); }
.hero h1 { font-size: clamp(42px, 6vw, 86px); line-height: 1.02; letter-spacing: -0.025em; max-width: 14ch; }
.hero-side p { font-size: 18px; color: var(--on-dark); margin: 0; }
.hero-side .actions { margin-top: 28px; }
.hero-frame { position: relative; background: var(--deep); }
.hero-frame > img { width: 100%; height: clamp(360px, 54vw, 780px); object-fit: cover; object-position: 50% 68%; }
.ribbon { position: absolute; left: 0; right: 0; bottom: 0; background: rgba(16, 27, 47, .86); border-top: 2px solid var(--brass); }
.ribbon .wrap { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 32px; padding-top: 18px; padding-bottom: 18px; }
.ribbon-title { margin: 0; font-size: 14px; color: var(--brass-light); }
.ribbon-title strong { display: block; margin-top: 2px; font: 600 22px/1.2 var(--serif); color: #fff; }
.ribbon .facts div { border-left-color: rgba(255,255,255,.18); }
.ribbon .facts dt { color: var(--on-dark-muted); }
.ribbon .facts dd { color: #fff; }
@media (max-width: 860px) {
  .hero-text { grid-template-columns: 1fr; }
  .hero h1 { max-width: none; }
  .hero-frame > img { height: auto; aspect-ratio: 16 / 10; }
  .ribbon { position: static; background: var(--deep); }
  .ribbon .wrap { grid-template-columns: 1fr; gap: 18px; padding-top: 22px; padding-bottom: 26px; }
}

.facts { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; margin: 0; }
.facts div { padding: 2px 20px; border-left: 1px solid var(--rule); }
.facts dt { font-size: 13px; color: var(--slate); }
.facts dd { margin: 2px 0 0; font: 600 18px/1.3 var(--sans); color: var(--ink); font-variant-numeric: tabular-nums; }
@media (max-width: 960px) {
  .facts { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 14px; }
  .facts div:nth-child(odd) { border-left: 0; padding-left: 0; }
}

/* Photo tiles linking to Sell / Buy */
.tiles { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.tile { position: relative; display: block; overflow: hidden; aspect-ratio: 5 / 4; background: var(--deep); color: #fff; text-decoration: none; --focus: var(--blue); }
.tile img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.tile::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(16,27,47,.94) 0%, rgba(16,27,47,.7) 38%, rgba(16,27,47,0) 72%); }
.tile-copy { position: absolute; left: 0; right: 0; bottom: 0; z-index: 1; padding: clamp(24px, 3vw, 40px); }
.tile h3 { font: 600 clamp(26px, 2.6vw, 34px)/1.15 var(--serif); color: #fff; }
.tile p { margin: 12px 0 0; font-size: 16px; color: #d5dbe5; max-width: 46ch; }
.tile-link { display: inline-block; margin-top: 18px; font-weight: 600; font-size: 15px; color: #fff; border-bottom: 2px solid var(--brass-light); padding-bottom: 2px; }
.tile:hover img { transform: scale(1.03); }
@media (max-width: 860px) {
  .tiles { grid-template-columns: 1fr; }
  .tile { aspect-ratio: auto; }
  .tile img { position: static; width: 100%; height: auto; aspect-ratio: 16 / 10; }
  .tile::after { display: none; }
  .tile-copy { position: static; }
}

/* Full-width photograph with a line of type over it */
.photo-band { position: relative; margin: 0; overflow: hidden; }
.photo-band > img { width: 100%; height: clamp(280px, 34vw, 500px); object-fit: cover; object-position: 50% 55%; }
.photo-band::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to right, rgba(16,27,47,.82) 0%, rgba(16,27,47,.45) 60%, rgba(16,27,47,.25) 100%); }
.band-copy { position: absolute; left: 0; right: 0; bottom: 0; z-index: 1; padding-bottom: clamp(28px, 4vw, 56px); }
.band-quote { margin: 0; font: 600 clamp(30px, 4.4vw, 60px)/1.06 var(--serif); letter-spacing: -0.02em; color: #fff; max-width: none; }
.photo-band + .section { padding-top: var(--section); }

/* Generic layouts */
.split { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(32px, 6vw, 96px); align-items: start; }
.split > .head { position: sticky; top: 110px; }
.head p { margin-top: 20px; }
.cols { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 40px; }
.cols.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.col { border-top: 1px solid var(--ink); padding-top: 20px; }
.col h3 { margin-bottom: 10px; }
.col p { font-size: 16px; }
@media (max-width: 860px) {
  .split, .cols, .cols.two { grid-template-columns: 1fr; }
  .split > .head { position: static; }
}

/* Inner page title band */
.page-head { padding: clamp(56px, 8vw, 112px) 0 clamp(40px, 5vw, 72px); }
.page-head h1 { max-width: 18ch; }
.page-head p { margin-top: 20px; }
.page-photo img { width: 100%; height: clamp(170px, 24vw, 340px); object-fit: cover; object-position: 50% 55%; }

/* Stepped process (a real sequence) */
.steps { list-style: none; margin: 0; padding: 0; counter-reset: step; }
.steps li { counter-increment: step; display: grid; grid-template-columns: 64px 1fr; gap: 16px; padding: 22px 0; border-top: 1px solid var(--rule); }
.steps li:last-child { border-bottom: 1px solid var(--rule); }
.steps li::before { content: counter(step, decimal-leading-zero); font: 600 26px/1.15 var(--serif); color: var(--brass); font-variant-numeric: tabular-nums; }
.steps h3 { margin-bottom: 4px; }
.steps p { margin: 0; font-size: 16px; color: var(--slate); }

/* Lists */
.ticks { list-style: none; margin: 0; padding: 0; }
.ticks li { padding: 11px 0; border-top: 1px solid var(--rule); }
.ticks li:last-child { border-bottom: 1px solid var(--rule); }
.ticks.two { columns: 2; column-gap: 40px; }
.ticks.two li { break-inside: avoid; }
@media (max-width: 640px) { .ticks.two { columns: 1; } }

/* Spec tables */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table.spec { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; font-size: 16px; }
.spec caption { text-align: left; font: 600 19px/1.35 var(--sans); color: var(--ink); padding-bottom: 12px; }
.spec th, .spec td { text-align: left; vertical-align: top; padding: 11px 16px 11px 0; border-top: 1px solid var(--rule); }
.spec thead th { font-size: 14px; font-weight: 500; color: var(--slate); border-top: 0; padding-top: 0; }
.spec tbody tr:last-child th, .spec tbody tr:last-child td { border-bottom: 1px solid var(--rule); }
.spec tbody th { font-weight: 500; color: var(--slate); width: 38%; }
.spec td.num, .spec th.num { text-align: right; padding-right: 0; }
.dark .spec th, .dark .spec td { border-color: rgba(255,255,255,.14); }
.dark .spec tbody th { color: var(--on-dark-muted); }
.dark .spec td { color: #fff; }

/* Featured aircraft on /aircraft/ */
.feature { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.feature-photo { display: block; background: var(--deep); }
.feature-photo img { width: 100%; height: 100%; object-fit: cover; }
.feature-body { padding: clamp(28px, 4vw, 48px); }
.feature-body h2 { font-size: clamp(28px, 3vw, 38px); margin: 8px 0 6px; }
.feature .kind { margin: 0; font-size: 14px; font-weight: 600; color: var(--brass-light); }
.feature .serial { margin: 0 0 22px; color: var(--on-dark); }
@media (max-width: 860px) { .feature { grid-template-columns: 1fr; } .feature-photo img { aspect-ratio: 16 / 10; height: auto; } }

/* Aircraft page: navy title band, photo mosaic, facts ribbon */
.listing-head { padding: clamp(40px, 6vw, 72px) 0 clamp(32px, 4vw, 52px); }
.listing-head .wrap { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: clamp(28px, 5vw, 72px); align-items: end; }
.listing-head .crumb { margin: 0 0 14px; font-size: 14px; }
.listing-head .crumb a { color: var(--on-dark); }
.listing-head h1 { font-size: clamp(36px, 5vw, 66px); }
.listing-head .serial { margin: 16px 0 0; font-size: 18px; color: var(--on-dark); }
.price { border-left: 1px solid rgba(255,255,255,.18); padding-left: clamp(20px, 3vw, 36px); }
.price h2 { font-size: 26px; }
.price p { margin: 8px 0 0; font-size: 16px; }
.price .actions { margin-top: 18px; }
.quick { list-style: none; margin: 18px 0 0; padding: 14px 0 0; border-top: 1px solid rgba(255,255,255,.18); display: flex; flex-wrap: wrap; gap: 6px 24px; font-size: 15px; }
.quick a { font-weight: 600; }
@media (max-width: 860px) {
  .listing-head .wrap { grid-template-columns: 1fr; }
  .price { border-left: 0; padding-left: 0; border-top: 1px solid rgba(255,255,255,.18); padding-top: 24px; }
}

.mosaic { display: grid; grid-template-columns: 2fr 1fr 1fr; grid-template-rows: repeat(2, clamp(150px, 18vw, 300px)); gap: 6px; padding: 0 6px 6px; background: var(--ink); }
.mosaic a { position: relative; display: block; overflow: hidden; background: var(--deep); }
.mosaic img { width: 100%; height: 100%; object-fit: cover; }
.mosaic a:hover img { opacity: .9; }
.mosaic .m0 { grid-row: span 2; }
.mosaic .more span { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; background: rgba(16,27,47,.62); color: #fff; font-weight: 600; font-size: 17px; }
.mosaic .more:hover span { background: rgba(16,27,47,.75); }
@media (max-width: 860px) {
  .mosaic { grid-template-columns: 1fr 1fr; grid-template-rows: none; }
  .mosaic .m0 { grid-row: auto; grid-column: span 2; aspect-ratio: 16 / 10; }
  .mosaic a { aspect-ratio: 4 / 3; }
  .mosaic .m2, .mosaic .m3 { display: none; }
}

.facts-ribbon { border-bottom: 1px solid var(--rule); }
.facts-ribbon .facts { padding: 26px 0; }
.facts-ribbon .facts dd { font: 600 clamp(22px, 2.4vw, 30px)/1.2 var(--serif); }

/* Section index on aircraft pages: the tabs of the listing file */
.file-index { position: sticky; top: var(--header); z-index: 15; background: var(--paper); border-bottom: 1px solid var(--rule); }
.file-index .wrap { display: flex; gap: 28px; overflow-x: auto; scrollbar-width: none; }
.file-index .wrap::-webkit-scrollbar { display: none; }
.file-index a { flex: none; padding: 14px 0 12px; color: var(--ink); text-decoration: none; font-size: 15px; font-weight: 500; border-bottom: 2px solid transparent; }
.file-index a:hover { border-bottom-color: var(--brass); }
.file-index + .section { padding-top: var(--section); }

/* All photos on an aircraft page */
.photo-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.photo-grid a { display: block; aspect-ratio: 3 / 2; overflow: hidden; background: #fff; }
.photo-grid img { width: 100%; height: 100%; object-fit: cover; }
.photo-grid a:hover img { opacity: .9; }
@media (max-width: 640px) { .photo-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px; } }

.viewer { border: 0; padding: 0; max-width: min(1400px, 96vw); width: 100%; background: var(--ink); color: #fff; }
.viewer::backdrop { background: rgba(10, 18, 32, .92); }
.viewer figure { margin: 0; }
.viewer img { width: 100%; max-height: 80vh; object-fit: contain; background: #0d1626; }
.viewer-bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 16px; }
.viewer-bar figcaption { font-size: 15px; color: var(--on-dark); }
.viewer-bar .controls { display: flex; gap: 8px; }
.viewer button { font: 600 14px/1 var(--sans); padding: 11px 14px; border-radius: 2px; border: 1px solid rgba(255,255,255,.4); background: transparent; color: #fff; cursor: pointer; --focus: #fff; }
.viewer button:hover { border-color: #fff; }

.wide-head { max-width: 760px; margin-bottom: 40px; }
.wide-head p { margin-top: 16px; }

.note { border-left: 3px solid var(--brass); padding: 4px 0 4px 18px; margin: 32px 0 0; }
.note p { margin: 0; font-size: 15px; color: var(--slate); }

/* People */
.people { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 40px; }
.person h3 { font: 600 26px/1.25 var(--serif); }
.person .role { color: var(--slate); margin: 2px 0 16px; }
.lines { margin: 0; display: grid; grid-template-columns: max-content 1fr; gap: 8px 20px; }
.lines dt { color: var(--slate); font-size: 15px; }
.lines dd { margin: 0; font-variant-numeric: tabular-nums; }
.dark .lines dt { color: var(--on-dark-muted); }

/* Closing contact band */
.cta .wrap { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); gap: clamp(32px, 6vw, 96px); align-items: end; }
.cta p { margin-top: 16px; }
@media (max-width: 860px) { .cta .wrap { grid-template-columns: 1fr; } }

/* Footer */
.site-footer { background: var(--deep); color: var(--on-dark-muted); font-size: 15px; padding: 56px 0 40px; border-top: 3px solid var(--brass); }
.site-footer .top { display: grid; grid-template-columns: minmax(0, 4fr) repeat(2, minmax(0, 3fr)); gap: 40px; }
.site-footer img { width: 210px; }
.site-footer p { margin: 18px 0 0; max-width: 40ch; }
.site-footer .motto { margin-top: 10px; color: var(--brass-light); }
.site-footer h2 { font: 600 15px/1.4 var(--sans); color: #fff; margin-bottom: 12px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { padding: 4px 0; }
.site-footer a { color: #e7ebf2; text-decoration: none; --focus: #fff; }
.site-footer a:hover { text-decoration: underline; }
.site-footer .legal { margin-top: 48px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.14); font-size: 13px; color: #8e99ab; }
.site-footer .legal p { max-width: none; margin: 0 0 6px; }
@media (max-width: 860px) { .site-footer .top { grid-template-columns: 1fr; } }

@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition: none !important; } .tile:hover img { transform: none; } }
@media print { .site-header, .site-footer, .cta, .mosaic, .actions, .file-index, .quick, .photo-grid { display: none !important; } }

/* Utilities (no inline styles: the CSP blocks them) */
.mt-12 { margin-top: 12px; }
.mt-20 { margin-top: 20px; }
.mt-32 { margin-top: 32px; }
.mt-40 { margin-top: 40px; }
.mt-56 { margin-top: 56px; }
.h-sub { font-size: 28px; }
.list-h { margin-bottom: 12px; }
a.plain { color: inherit; text-decoration: none; }
a.plain:hover { text-decoration: underline; }