/* ============================================================
   Historic Aircraft — Master Stylesheet
   Palette: aged parchment, RAF roundel reds & blues,
            olive drab, brass, gunmetal
   ============================================================ */

/* ------------------------------------------------------------
   Custom Properties
   ------------------------------------------------------------ */
:root {
	/* Colours */
	--col-sky:        #c8d8e8;   /* pale morning sky */
	--col-cloud:      #f0ece0;   /* aged parchment / cloud */
	--col-parchment:  #e8dfc8;   /* warm parchment */
	--col-canvas:     #d4c9a8;   /* doped canvas */
	--col-drab:       #6b7c4b;   /* olive drab */
	--col-drab-dark:  #4a5634;   /* dark olive */
	--col-roundel-red:#b5121b;   /* RAF roundel red */
	--col-roundel-blue:#003087; /* RAF roundel blue */
	--col-brass:      #b8952a;   /* polished brass */
	--col-brass-dark: #8a6e1e;   /* aged brass */
	--col-gunmetal:   #2c3038;   /* gunmetal / engine casing */
	--col-ink:        #1a1a2e;   /* near-black ink */
	--col-smoke:      #6c6c7a;   /* exhaust smoke mid-tone */

	/* Layout */
	--header-height:  80px;

	/* Typography */
	--font-display:   'Georgia', 'Times New Roman', serif;
	--font-body:      'Palatino Linotype', 'Book Antiqua', Palatino, serif;
	--font-mono:      'Courier New', Courier, monospace;

	/* Sizing */
	--radius:         4px;
	--radius-lg:      8px;
	--sleeve-width:   1140px;
	--gap:            1.5rem;
}

/* ------------------------------------------------------------
   Reset & Base
   ------------------------------------------------------------ */
*, *::before, *::after {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

html {
	font-size: 16px;
	scroll-behavior: smooth;
}

body {
	font-family: var(--font-body);
	font-size: 1rem;
	line-height: 1.75;
	color: var(--col-ink);
	background-color: var(--col-cloud);
	min-height: 100vh;
	display: flex;
	flex-direction: column;
}

img {
	max-width: 100%;
	height: auto;
	display: block;
}

a {
	color: var(--col-roundel-blue);
	text-decoration: underline;
	text-underline-offset: 3px;
	transition: color 0.2s ease;
}

a:hover,
a:focus {
	color: var(--col-roundel-red);
}

/* ------------------------------------------------------------
   Layout — Sleeve
   ------------------------------------------------------------ */
.sleeve {
	width: 100%;
	max-width: var(--sleeve-width);
	margin: 0 auto;
	padding: 0 var(--gap);
}

/* ------------------------------------------------------------
   Header
   ------------------------------------------------------------ */
header {
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	z-index: 1000;
	background-color: var(--col-gunmetal);
	background-image: linear-gradient(
		180deg,
		#3a4050 0%,
		var(--col-gunmetal) 100%
	);
	border-bottom: 4px solid var(--col-brass);
	padding: 0;
	box-shadow: 0 4px 16px rgba(0, 0, 0, 0.5);
}

header .sleeve {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--gap);
	min-height: 80px;
	padding-top: 0.75rem;
	padding-bottom: 0.75rem;
}

/* Logo link */
.site-logo {
	display: inline-block;
	text-decoration: none;
	line-height: 1.2;
}

/* Span 1 — primary title */
.site-logo__title {
	display: block;
	font-family: var(--font-display);
	font-size: 1.9rem;
	font-weight: normal;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--col-parchment);
	transition: color 0.2s ease;
}

/* Span 2 — sub-header */
.site-logo__subtitle {
	display: block;
	font-family: var(--font-body);
	font-size: 0.78rem;
	font-style: italic;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: var(--col-brass);
	transition: color 0.2s ease;
}

.site-logo:hover .site-logo__title    { color: var(--col-brass); }
.site-logo:hover .site-logo__subtitle { color: var(--col-parchment); }

/* Burger menu button */
.burger {
	display: flex;
	flex-direction: column;
	justify-content: center;
	gap: 5px;
	width: 44px;
	height: 44px;
	padding: 8px;
	background: none;
	border: 2px solid rgba(184, 149, 42, 0.4);
	border-radius: var(--radius);
	cursor: pointer;
	flex-shrink: 0;
	transition: border-color 0.2s ease;
}

.burger:hover {
	border-color: var(--col-brass);
}

.burger__line {
	display: block;
	width: 100%;
	height: 2px;
	background-color: var(--col-parchment);
	border-radius: 2px;
	transform-origin: center;
	transition: transform 0.3s ease, opacity 0.3s ease, background-color 0.2s ease;
}

.burger:hover .burger__line {
	background-color: var(--col-brass);
}

/* Animated open state — morphs into × */
.burger.is-open .burger__line:nth-child(1) {
	transform: translateY(7px) rotate(45deg);
}
.burger.is-open .burger__line:nth-child(2) {
	transform: scaleX(0);
	opacity: 0;
}
.burger.is-open .burger__line:nth-child(3) {
	transform: translateY(-7px) rotate(-45deg);
}

/* Roundel badge — purely decorative */
.roundel {
	width: 52px;
	height: 52px;
	border-radius: 50%;
	background:
		radial-gradient(circle, #ffffff 20%, transparent 20%),
		radial-gradient(circle, #ffffff 20%, var(--col-roundel-red) 20%, var(--col-roundel-red) 40%, var(--col-roundel-blue) 40%);
	flex-shrink: 0;
}

/* ------------------------------------------------------------
   Navigation — slide-out panel
   ------------------------------------------------------------ */
.nav-panel {
	position: fixed;
	top: 0;
	left: 0;
	bottom: 0;
	width: min(300px, 85vw);
	background-color: var(--col-gunmetal);
	background-image: linear-gradient(180deg, #3a4050 0%, var(--col-gunmetal) 100%);
	border-right: 1px solid var(--col-brass);
	z-index: 1100;
	transform: translateX(-100%);
	transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
	overflow-y: auto;
	overscroll-behavior: contain;
	display: flex;
	flex-direction: column;
	box-shadow: 4px 0 24px rgba(0, 0, 0, 0.5);
}

.nav-panel.is-open {
	transform: translateX(0);
}

.nav-backdrop {
	position: fixed;
	inset: 0;
	background: rgba(0, 0, 0, 0.6);
	z-index: 1050;
	opacity: 0;
	pointer-events: none;
	transition: opacity 0.3s ease;
}

.nav-backdrop.is-open {
	opacity: 1;
	pointer-events: auto;
}

.nav-panel__head {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 1rem 1.25rem;
	border-bottom: 1px solid rgba(184, 149, 42, 0.3);
	flex-shrink: 0;
}

.nav-panel__brand {
	font-family: var(--font-display);
	font-size: 1.2rem;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--col-parchment);
	line-height: 1;
}

.nav-close {
	background: none;
	border: 1px solid rgba(184, 149, 42, 0.3);
	border-radius: var(--radius);
	color: rgba(232, 223, 200, 0.65);
	font-size: 1.4rem;
	line-height: 1;
	padding: 0.15rem 0.5rem;
	cursor: pointer;
	transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.nav-close:hover {
	background: rgba(255, 255, 255, 0.08);
	border-color: var(--col-brass);
	color: var(--col-parchment);
}

.nav-list,
.nav-sub {
	list-style: none;
	margin: 0;
}

.nav-list li::before,
.nav-sub li::before {
	content: none;
}

.nav-list {
	padding: 0.5rem 0 2rem;
	flex: 1;
}

.nav-list > li > a,
.nav-group-btn {
	display: flex;
	align-items: center;
	width: 100%;
	padding: 0.75rem 1.25rem;
	color: rgba(232, 223, 200, 0.82);
	text-decoration: none;
	font-family: var(--font-display);
	font-size: 0.9rem;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	background: none;
	border: none;
	cursor: pointer;
	text-align: left;
	transition: background 0.2s ease, color 0.2s ease;
}

.nav-list > li > a:hover,
.nav-group-btn:hover {
	background: rgba(255, 255, 255, 0.06);
	color: var(--col-parchment);
}

.nav-list > li > a[aria-current="page"] {
	color: var(--col-parchment);
	border-left: 3px solid var(--col-brass);
	padding-left: calc(1.25rem - 3px);
	background: rgba(184, 149, 42, 0.1);
}

.nav-group-btn {
	justify-content: space-between;
}

.nav-group-btn svg {
	flex-shrink: 0;
	transition: transform 0.25s ease;
}

.nav-group-btn[aria-expanded="true"] svg {
	transform: rotate(180deg);
}

.nav-group-btn[aria-expanded="true"] {
	color: var(--col-parchment);
}

.nav-sub {
	list-style: none;
	margin: 0;
	padding: 0.25rem 0;
	background: rgba(0, 0, 0, 0.18);
}

.nav-sub li a {
	display: block;
	padding: 0.55rem 1.25rem 0.55rem calc(1.25rem + 1rem);
	color: rgba(232, 223, 200, 0.60);
	text-decoration: none;
	font-family: var(--font-body);
	font-size: 0.875rem;
	transition: background 0.2s ease, color 0.2s ease;
}

.nav-sub li a:hover {
	background: rgba(255, 255, 255, 0.06);
	color: var(--col-parchment);
}

.nav-sub li a[aria-current="page"] {
	color: var(--col-brass);
	border-left: 2px solid var(--col-brass);
	padding-left: calc(1.25rem + 1rem - 2px);
}

.nav-divider {
	height: 1px;
	background: rgba(184, 149, 42, 0.3);
	margin: 0.5rem 1.25rem;
}

/* ------------------------------------------------------------
   Main content
   ------------------------------------------------------------ */
main {
	padding-bottom: 2.5rem;
	margin-top: var(--header-height);
	flex: 1;
}

main.no-banner {
	padding-top: var(--gap);
}

/* ------------------------------------------------------------
   Typography
   ------------------------------------------------------------ */
h1, h2, h3, h4, h5, h6 {
	font-family: var(--font-display);
	font-weight: normal;
	line-height: 1.25;
	color: var(--col-gunmetal);
	margin-bottom: 0.6em;
}

h1 { font-size: 2.4rem;  border-bottom: 2px solid var(--col-brass); padding-bottom: 0.3em; margin-bottom: 0.75rem; }
h2 { font-size: 1.9rem; }
h3 { font-size: 1.55rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.05rem; }
h6 { font-size: 0.95rem; text-transform: uppercase; letter-spacing: 0.06em; }

p {
	margin-bottom: 1.25rem;
}

p:last-child {
	margin-bottom: 0;
}

strong, b {
	font-weight: bold;
	color: var(--col-drab-dark);
}

em, i {
	font-style: italic;
}

blockquote {
	border-left: 4px solid var(--col-brass);
	margin: 1.5rem 0;
	padding: 0.75rem 1.25rem;
	background-color: var(--col-parchment);
	font-style: italic;
	color: var(--col-smoke);
	border-radius: 0 var(--radius) var(--radius) 0;
}

blockquote cite {
	display: block;
	margin-top: 0.5rem;
	font-size: 0.875rem;
	font-style: normal;
	color: var(--col-brass-dark);
}

hr {
	border: none;
	border-top: 2px solid var(--col-canvas);
	margin: 2rem 0;
}

/* ------------------------------------------------------------
   Lists
   ------------------------------------------------------------ */
ul, ol {
	margin: 0 0 1.25rem 1.5rem;
}

ul li, ol li {
	margin-bottom: 0.4rem;
}

ul {
	list-style: none;
	margin-left: 0;
}

ul li::before {
	content: '✦';
	color: var(--col-brass);
	font-size: 0.65rem;
	margin-right: 0.6rem;
	vertical-align: middle;
}

/* ------------------------------------------------------------
   Buttons
   ------------------------------------------------------------ */
.btn,
button,
input[type="submit"],
input[type="button"] {
	display: inline-block;
	padding: 0.6rem 1.5rem;
	font-family: var(--font-display);
	font-size: 0.9rem;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	text-decoration: none;
	border: 2px solid transparent;
	border-radius: var(--radius);
	cursor: pointer;
	transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn,
.btn-primary {
	background-color: var(--col-roundel-blue);
	color: #ffffff;
	border-color: var(--col-roundel-blue);
}

.btn:hover,
.btn-primary:hover {
	background-color: var(--col-roundel-red);
	border-color: var(--col-roundel-red);
	color: #ffffff;
}

.btn-secondary {
	background-color: transparent;
	color: var(--col-drab-dark);
	border-color: var(--col-drab);
}

.btn-secondary:hover {
	background-color: var(--col-drab);
	color: var(--col-parchment);
}

.btn-brass {
	background-color: var(--col-brass);
	color: var(--col-gunmetal);
	border-color: var(--col-brass-dark);
}

.btn-brass:hover {
	background-color: var(--col-brass-dark);
	color: var(--col-parchment);
}

/* ------------------------------------------------------------
   Forms
   ------------------------------------------------------------ */
label {
	display: block;
	margin-bottom: 0.3rem;
	font-size: 0.875rem;
	font-family: var(--font-display);
	letter-spacing: 0.04em;
	text-transform: uppercase;
	color: var(--col-drab-dark);
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="url"],
input[type="password"],
input[type="search"],
input[type="number"],
input[type="date"],
textarea,
select {
	width: 100%;
	padding: 0.55rem 0.85rem;
	font-family: var(--font-body);
	font-size: 1rem;
	color: var(--col-ink);
	background-color: var(--col-cloud);
	border: 2px solid var(--col-canvas);
	border-radius: var(--radius);
	transition: border-color 0.2s ease, box-shadow 0.2s ease;
	appearance: none;
}

input:focus,
textarea:focus,
select:focus {
	outline: none;
	border-color: var(--col-roundel-blue);
	box-shadow: 0 0 0 3px rgba(0, 48, 135, 0.15);
}

textarea {
	resize: vertical;
	min-height: 120px;
}

.form-group {
	margin-bottom: 1.25rem;
}

/* ------------------------------------------------------------
   Tables
   ------------------------------------------------------------ */
table {
	width: 100%;
	border-collapse: collapse;
	margin-bottom: 1.5rem;
	font-size: 0.95rem;
}

thead {
	background-color: var(--col-gunmetal);
	color: var(--col-parchment);
}

thead th {
	padding: 0.75rem 1rem;
	text-align: left;
	font-family: var(--font-display);
	font-weight: normal;
	letter-spacing: 0.05em;
	text-transform: uppercase;
	font-size: 0.85rem;
}

tbody tr {
	border-bottom: 1px solid var(--col-canvas);
}

tbody tr:nth-child(even) {
	background-color: rgba(212, 201, 168, 0.3);
}

tbody tr:hover {
	background-color: rgba(0, 48, 135, 0.06);
}

td {
	padding: 0.65rem 1rem;
}

/* ------------------------------------------------------------
   Cards
   ------------------------------------------------------------ */
.card {
	background-color: var(--col-cloud);
	border: 1px solid var(--col-canvas);
	border-top: 3px solid var(--col-brass);
	border-radius: var(--radius-lg);
	padding: 1.5rem;
	box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
	transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.card:hover {
	box-shadow: 0 6px 20px rgba(0, 0, 0, 0.14);
	transform: translateY(-2px);
}

.card-title {
	font-family: var(--font-display);
	font-size: 1.2rem;
	color: var(--col-gunmetal);
	margin-bottom: 0.5rem;
}

.card-meta {
	font-size: 0.8rem;
	color: var(--col-smoke);
	text-transform: uppercase;
	letter-spacing: 0.06em;
	margin-bottom: 0.75rem;
}

/* ------------------------------------------------------------
   Banner / Hero
   ------------------------------------------------------------ */
.banner {
	width: 100%;
	margin-bottom: var(--gap);
	box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
	background: linear-gradient(
		160deg,
		var(--col-gunmetal)  0%,
		var(--col-drab-dark) 55%,
		var(--col-drab)     100%
	);
}

.banner__rivets {
	width: 100%;
	height: 28px;
	background: url('/assets/img/rivets.png') repeat-x left center;
}

.banner__image {
	position: relative;
	max-width: var(--sleeve-width);
	margin: 0 auto;
	overflow: hidden;
}


.banner img {
	display: block;
	width: 100%;
	height: auto;
	image-rendering: high-quality;
	box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
}

/* ------------------------------------------------------------
   Grid utilities
   ------------------------------------------------------------ */
.grid {
	display: grid;
	gap: var(--gap);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ------------------------------------------------------------
   Notices & Badges
   ------------------------------------------------------------ */
.notice {
	padding: 0.75rem 1.1rem;
	border-radius: var(--radius);
	border-left: 4px solid;
	margin-bottom: 1.25rem;
	font-size: 0.95rem;
}

.notice-info    { background: rgba(0,48,135,0.08);   border-color: var(--col-roundel-blue); }
.notice-success { background: rgba(107,124,75,0.12); border-color: var(--col-drab); }
.notice-warning { background: rgba(184,149,42,0.12); border-color: var(--col-brass); }
.notice-danger  { background: rgba(181,18,27,0.08);  border-color: var(--col-roundel-red); }

.badge {
	display: inline-block;
	padding: 0.15rem 0.55rem;
	font-size: 0.75rem;
	font-family: var(--font-display);
	letter-spacing: 0.05em;
	text-transform: uppercase;
	border-radius: var(--radius);
	line-height: 1.6;
}

.badge-blue  { background-color: var(--col-roundel-blue); color: #fff; }
.badge-red   { background-color: var(--col-roundel-red);  color: #fff; }
.badge-brass { background-color: var(--col-brass);        color: var(--col-gunmetal); }
.badge-drab  { background-color: var(--col-drab);         color: #fff; }

/* ------------------------------------------------------------
   Store — product grid
   ------------------------------------------------------------ */
.store-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
	gap: var(--gap);
	margin-top: var(--gap);
}

.store-card {
	background-color: var(--col-cloud);
	border: 1px solid var(--col-canvas);
	border-top: 3px solid var(--col-brass);
	border-radius: var(--radius-lg);
	overflow: hidden;
	display: flex;
	flex-direction: column;
	box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
	transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.store-card:hover {
	box-shadow: 0 6px 20px rgba(0, 0, 0, 0.14);
	transform: translateY(-2px);
}

.store-card__thumb {
	width: 100%;
	aspect-ratio: 4 / 3;
	overflow: hidden;
	background-color: var(--col-canvas);
}

.store-card__thumb img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
	transition: transform 0.3s ease;
}

.store-card:hover .store-card__thumb img {
	transform: scale(1.03);
}

.store-card__body {
	padding: 1.1rem 1.25rem 1.25rem;
	display: flex;
	flex-direction: column;
	flex: 1;
}

.store-card__name {
	font-family: var(--font-display);
	font-size: 1.05rem;
	color: var(--col-gunmetal);
	margin-bottom: 0.4rem;
	border: none;
	padding: 0;
}

.store-card__desc {
	font-size: 0.875rem;
	color: var(--col-smoke);
	margin-bottom: 0.75rem;
	flex: 1;
}

.store-card__footer {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 0.75rem;
	margin-top: auto;
	padding-top: 0.75rem;
	border-top: 1px solid var(--col-canvas);
}

.store-card__price {
	font-family: var(--font-display);
	font-size: 1.15rem;
	font-weight: bold;
	color: var(--col-gunmetal);
}

.store-card__btn {
	padding: 0.45rem 1rem;
	font-size: 0.8rem;
	white-space: nowrap;
}

/* ------------------------------------------------------------
   Footer
   ------------------------------------------------------------ */
footer {
	background-color: var(--col-gunmetal);
	border-top: 4px solid var(--col-brass);
	color: var(--col-canvas);
	padding: 2.5rem 0 1.5rem;
	font-size: 0.9rem;
}

footer .sleeve {
	display: block;
}

footer h4 {
	font-size: 0.85rem;
	text-transform: uppercase;
	letter-spacing: 0.08em;
	margin-bottom: 0.75rem;
	padding-bottom: 0.4rem;
	border-bottom: 1px solid rgba(184, 149, 42, 0.4);
}

footer p {
	margin: 0;
}

footer strong,
footer b,
footer em,
footer i,
footer span {
	color: inherit;
}

footer a:hover {
	color: var(--col-brass);
}

.footer-base {
	text-align: center;
	margin-top: 2rem;
	padding-top: 1rem;
	border-top: 1px solid rgba(255, 255, 255, 0.08);
	font-size: 0.8rem;
}

/* ------------------------------------------------------------
   Utility classes
   ------------------------------------------------------------ */
.text-center  { text-align: center; }
.text-right   { text-align: right; }
.text-brass   { color: var(--col-brass); }
.text-red     { color: var(--col-roundel-red); }
.text-blue    { color: var(--col-roundel-blue); }
.text-muted   { color: var(--col-smoke); }
.text-small   { font-size: 0.85rem; }
.text-upper   { text-transform: uppercase; letter-spacing: 0.06em; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-1 { margin-top: 1rem; }
.mb-1 { margin-bottom: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-2 { margin-bottom: 2rem; }

/* ------------------------------------------------------------
   Responsive
   ------------------------------------------------------------ */
@media (max-width: 900px) {
	.grid-3,
	.grid-4 {
		grid-template-columns: repeat(2, 1fr);
	}

	.banner-content h1 {
		font-size: 2rem;
	}
}

@media (max-width: 600px) {
	:root {
		--gap: 1rem;
	}

	h1 { font-size: 1.8rem; }
	h2 { font-size: 1.5rem; }

	.banner__rivets {
		height: 14px;
		background-size: 28px 14px;
	}


	.grid-2,
	.grid-3,
	.grid-4 {
		grid-template-columns: 1fr;
	}

	header .sleeve {
		flex-direction: row;
		align-items: center;
		justify-content: space-between;
	}

}