.header-left {
	display: flex;
	align-items: center;
	gap: 18px;
}
.cart-header-btn {
	background: none;
	border: none;
	cursor: pointer;
	display: flex;
	align-items: center;
	padding: 0 6px 0 0;
	margin-right: 0;
}
.cart-icon {
	font-size: 22px;
	margin-right: 2px;
}
.cart-count {
	font-size: 13px;
	background: var(--primary);
	color: #222;
	border-radius: 8px;
	padding: 2px 7px;
	margin-left: 2px;
	font-weight: 600;
}
:root {
	--bg: #0b0f14;
	--panel: #111823;
	--panel-2: #0f1520;
	--text: #e6edf3;
	--muted: #94a3b8;
	--primary: #eab308; /* amber-500 */
	--primary-600: #ca8a04;
	--accent: #38bdf8;
	--danger: #ef4444;
	--ring: #334155;
	--card: #0d131d;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
	margin: 0;
	font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
	color: var(--text);
	background: radial-gradient(1200px 800px at 10% -10%, #1b2430 0%, transparent 60%),
							radial-gradient(1000px 700px at 100% 0%, #0e1726 0%, transparent 60%),
							var(--bg);
	line-height: 1.5;
}

.container { width: min(1100px, 92%); margin-inline: auto; }
.narrow { width: min(720px, 92%); }

.site-header {
	position: sticky; top: 0; z-index: 50;
	background: linear-gradient(180deg, rgba(11,15,20,0.9), rgba(11,15,20,0.6));
	border-bottom: 1px solid #0f172a;
	-webkit-backdrop-filter: saturate(140%) blur(8px);
	backdrop-filter: saturate(140%) blur(8px);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
.header-right { display: flex; align-items: center; gap: 12px; }
.brand { display: flex; align-items: center; gap: 12px; }
.logo {
	/* make logo area larger so detailed logo image is visible */
	width: 72px;
	height: 72px;
	display: grid;
	place-items: center;
	border-radius: 10px;
	background: linear-gradient(135deg, #0e1726, #1f2937);
	box-shadow: 0 2px 12px rgba(0,0,0,0.4);
	text-decoration: none;
	overflow: hidden;
}
.logo-img {
	/* allow the image to scale while preserving aspect ratio */
	width: auto;
	height: 100%;
	max-width: 100%;
	display: block;
	object-fit: contain;
}
.brand-text h1 { font-size: 20px; margin: 0; letter-spacing: 0.5px; }
.subtitle { margin: 0; color: var(--muted); font-size: 12px; }

.nav { display: flex; gap: 8px; }
.nav-link { color: var(--text); text-decoration: none; padding: 8px 12px; border-radius: 8px; border: 1px solid transparent; }
.nav-link:hover { border-color: var(--ring); background: rgba(255,255,255,0.02); }
.nav-link.active { border-color: #3f3f46; background: #111827; }

.hero { padding: 56px 0; }
.hero-inner { display: grid; grid-template-columns: 1.1fr 1fr; gap: 28px; align-items: center; }
.hero-copy h2 { font-size: clamp(28px, 5vw, 40px); margin: 0 0 8px; }
.hero-copy p { color: var(--muted); margin: 0 0 18px; }
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 16px; border-radius: 10px; border: 1px solid transparent; text-decoration: none; cursor: pointer; font-weight: 600; }
.btn-primary { background: linear-gradient(180deg, var(--primary), var(--primary-600)); color: #1a1a1a; }
.btn-primary:hover { filter: brightness(1.05); }
.btn-secondary { background: #0b1220; color: #f8fafc; border-color: #1f2937; }
.btn-secondary:hover { background: #0d1626; }
.btn-ghost { background: transparent; color: var(--text); border-color: #30323a; }
.btn-ghost:hover { background: rgba(255,255,255,0.03); }

.hero-card-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.card { position: relative; display: grid; grid-template-columns: auto 1fr auto; gap: 14px; align-items: center; padding: 14px; border-radius: 14px; background: linear-gradient(180deg, var(--panel), var(--panel-2)); border: 1px solid #0f172a; text-decoration: none; color: var(--text); box-shadow: inset 0 0 0 1px rgba(255,255,255,0.02); }
.card:hover { transform: translateY(-1px); transition: 150ms ease; border-color: #1e293b; }
.card-icon { font-size: 26px; }
.card-content h3 { margin: 0; }
.card-content p { margin: 4px 0 0; color: var(--muted); font-size: 14px; }
.card-arrow { opacity: 0.6; }

.info { padding: 24px 0 60px; }
.steps { margin: 10px 0 0; color: var(--muted); }
.steps li { margin: 6px 0; }

.site-footer { border-top: 1px solid #0f172a; margin-top: 28px; }
.footer-inner { padding: 16px 0; color: var(--muted); }

/* Calculator pages */
.calc-card { margin: 26px 0; padding: 18px; border-radius: 16px; background: linear-gradient(180deg, var(--panel), var(--panel-2)); border: 1px solid #0f172a; box-shadow: inset 0 0 0 1px rgba(255,255,255,0.02); }
.calc-card h2 { margin-top: 0; }
.calc-form { display: grid; gap: 14px; }
.form-row { display: grid; gap: 8px; }
.form-row.inline { grid-template-columns: 1fr 1fr; align-items: end; gap: 12px; }
.form-row.inline .ml { margin-left: 8px; }
.input-with-unit { display: grid; grid-template-columns: 1fr auto; gap: 8px; align-items: center; }
.unit { padding: 10px 12px; border: 1px solid #2a3342; border-radius: 10px; background: #0b1220; color: var(--muted); font-size: 14px; }

.btn-inline-group { display: inline-flex; align-items: center; gap: 8px; }
input, select { width: 100%; padding: 10px 12px; border-radius: 10px; border: 1px solid #2a3342; background: #0b1220; color: var(--text); outline: none; }
input:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(56,189,248,0.15); }
.hint { color: var(--muted); }
.action-row { display: flex; gap: 10px; margin-top: 2px; }
.result { margin-top: 12px; padding: 14px; border-radius: 12px; background: #0b1220; border: 1px solid #1f2937; color: #e5e7eb; }
.result .value { font-weight: 700; color: var(--primary); }

/* Utilities */
.hidden { display: none !important; }
.mt-10 { margin-top: 10px; }
.mt-24 { margin-top: 24px; }

/* Cart Drawer */
.overlay {
	position: fixed; inset: 0; background: rgba(0,0,0,0.5); -webkit-backdrop-filter: blur(2px); backdrop-filter: blur(2px);
}
.cart-drawer {
	position: fixed; top: 0; right: 0; height: 100dvh; width: min(380px, 92vw);
	background: linear-gradient(180deg, var(--panel), var(--panel-2));
	border-left: 1px solid #0f172a;
	box-shadow: -10px 0 30px rgba(0,0,0,0.4);
	display: grid; grid-template-rows: auto 1fr auto;
	transform: translateX(100%);
	transition: transform 180ms ease-in-out;
	z-index: 1000;
}
.cart-drawer.open { transform: translateX(0); }
.cart-drawer-header { display: flex; align-items: center; justify-content: space-between; padding: 14px; border-bottom: 1px solid #0f172a; }
.cart-drawer-body { padding: 12px 14px; overflow: auto; }
.cart-drawer-footer { padding: 12px 14px; border-top: 1px solid #0f172a; }
.cart-drawer-item { padding: 10px; border: 1px solid #1f2937; border-radius: 10px; margin-bottom: 10px; background: #0b1220; }

/* Full cart */
.full-cart-item { display: grid; grid-template-columns: 1fr auto; gap: 10px; align-items: center; padding: 10px; border: 1px solid #1f2937; border-radius: 10px; margin-bottom: 10px; background: #0b1220; }
.full-cart-meta { color: var(--muted); font-size: 14px; }
.full-cart-actions { display: flex; gap: 8px; }

@media (max-width: 860px) {
	.hero-inner { grid-template-columns: 1fr; gap: 18px; }
}

@media (max-width: 600px) {
	html, body { font-size: 15px; }
	.container, .narrow { width: 98%; padding: 0 2vw; }
	.site-header, .site-footer { font-size: 15px; }
	.header-inner, .footer-inner { flex-direction: column; align-items: flex-start; gap: 8px; }
	.brand-text h1 { font-size: 18px; }
	/* reduce logo size on small screens to avoid layout issues */
	.logo { width: 48px; height: 48px; }
	.hero { padding: 32px 0 18px; }
	.hero-copy h2 { font-size: 22px; }
	.hero-card-grid { grid-template-columns: 1fr; gap: 10px; }
	.calc-card { margin: 16px 0; padding: 10px; }
	.calc-form { gap: 10px; }
	.form-row, .form-row.inline { grid-template-columns: 1fr !important; gap: 8px; }
	.action-row { flex-direction: column; gap: 8px; }
	.btn, button, input, select { font-size: 1em; min-height: 44px; }
	.btn, button { width: 100%; justify-content: center; }
	.result { font-size: 1em; }
}