:root {
	--bg: #0b1220;
	--panel: #0f172a;
	--text: #e5e7eb;
	--muted: #94a3b8;
	--brand: #0ea5e9;
	--brand-2: #22d3ee;
	--brand-3: #8b5cf6; /* violet */
	--brand-4: #f43f5e; /* rose */
	--accent: #f59e0b;
	--ring: 0 0 0 3px color(display-p3 0.08 0.65 0.93 / .35);
}
@media (prefers-color-scheme: light) {
	:root { --bg:#ffffff; --panel:#f8fafc; --text:#0f172a; --muted:#475569; }
}
* { box-sizing: border-box; }
html, body { margin:0; padding:0; }
body {
	font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Segoe UI", "Roboto", "Helvetica Neue", Arial, sans-serif;
	background:
		radial-gradient(1200px 600px at 80% -20%, color-mix(in oklab, var(--brand), transparent 80%), transparent),
		radial-gradient(900px 500px at -10% 110%, color-mix(in oklab, var(--brand-3), transparent 82%), transparent),
		var(--bg);
	color: var(--text);
}
.wrap { width: min(1320px, 94%); margin-inline: auto; }

.site-header {
	position: sticky; top:0; z-index:10; backdrop-filter: blur(8px);
	background:
		linear-gradient(90deg, color-mix(in oklab, var(--brand), transparent 75%), color-mix(in oklab, var(--brand-3), transparent 82%)),
		color-mix(in oklab, var(--bg), transparent 35%);
	border-bottom: 1px solid color-mix(in oklab, var(--text), transparent 85%);
	margin-bottom: 0;
}
.site-header .wrap { display:flex; align-items:center; justify-content:space-between; padding:12px 0; }
.brand { display:flex; align-items:center; gap:10px; color:inherit; text-decoration:none; font-weight:700; letter-spacing:.02em; }
.nav a { color:inherit; text-decoration:none; margin-left:18px; opacity:.85; font-weight:400; }
.nav a:hover { opacity:1; }
.nav a.active { font-weight:700 !important; opacity:1 !important; color:#ffffff !important; }
@media (prefers-color-scheme: light) {
	.nav a.active { color:var(--brand) !important; }
}

.hero { padding: clamp(32px, 6vw, 72px) 0; }
.hero-inner { display:grid; grid-template-columns: 1.2fr 1fr; gap: 26px; align-items:center; }
.hero h1 { font-size: clamp(28px, 4.8vw, 54px); line-height:1.05; margin:0 0 8px; }
.hero .accent { background: linear-gradient(90deg, var(--brand), var(--brand-2)); -webkit-background-clip:text; background-clip:text; color: transparent; }
.lede { font-size: clamp(16px, 1.4vw, 20px); color: var(--muted); margin:0 0 18px; }
.search { display:flex; gap:10px; }
.search input {
	flex:1; padding:12px 14px; border-radius:12px; border:1px solid color-mix(in oklab, var(--text), transparent 80%);
	background: var(--panel); color: inherit;
}

.search button {
	padding:12px 16px; border-radius:12px; border:none; color:#05202a; background: linear-gradient(90deg, var(--brand), var(--brand-2));
	font-weight:700; cursor:pointer;
}
.hero-image { width:100%; height:auto; border-radius:18px; box-shadow: 0 12px 40px #0006; }

.section-head { 
	display:flex; align-items:end; justify-content:space-between; gap:16px; margin:36px 0 14px;
	position: sticky; top: 53px; z-index: 9;
	background: color-mix(in oklab, var(--bg), transparent 20%);
	backdrop-filter: blur(8px);
	padding: 14px 0 12px;
	margin-top: -1px;
	margin-bottom: 14px;
	border-top: none;
	border-bottom: 1px solid color-mix(in oklab, var(--text), transparent 85%);
	box-shadow: 0 2px 8px color-mix(in oklab, var(--bg), transparent 60%);
}
.section-head h2 { margin:0; font-size: clamp(20px, 2.8vw, 28px); }
.filters { display:flex; gap:10px; }
.filters select { 
	padding:10px 14px; 
	border-radius:12px; 
	background: var(--panel); 
	color:inherit; 
	border:1px solid color-mix(in oklab, var(--text), transparent 75%);
	font-size: 14px;
	transition: all 0.2s ease;
	cursor: pointer;
	appearance: none;
	background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
	background-repeat: no-repeat;
	background-position: right 12px center;
	padding-right: 36px;
}
.filters select:hover {
	border-color: color-mix(in oklab, var(--brand), transparent 50%);
	background-color: color-mix(in oklab, var(--panel), var(--brand) 3%);
}
.filters select:focus {
	outline: none;
	border-color: color-mix(in oklab, var(--brand), transparent 35%);
	box-shadow: 0 0 0 3px color-mix(in oklab, var(--brand), transparent 15%);
}

.deal-grid {
	list-style:none; padding:0; margin:16px 0 8px;
	display:grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap:16px;
}
.card {
	background:
		linear-gradient(180deg, color-mix(in oklab, var(--panel), transparent 0%), color-mix(in oklab, var(--panel), transparent 0%));
	border:1px solid color-mix(in oklab, var(--text), transparent 85%);
	border-radius:16px; overflow:hidden;
	transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease, background .18s ease;
}
.card:hover {
	transform: translateY(-2px);
	box-shadow: 0 10px 24px color-mix(in oklab, var(--brand-3), transparent 65%);
	border-color: color-mix(in oklab, var(--brand), transparent 35%);
	background: linear-gradient(180deg, color-mix(in oklab, var(--panel), transparent 0%), color-mix(in oklab, var(--brand-3), transparent 92%));
}
.card-thumb { aspect-ratio: 3 / 2; width:100%; height:auto; object-fit: cover; display:block; filter: brightness(0.95); }

/* 画像スライダー */
.card-thumb-slider { position:relative; aspect-ratio: 3 / 2; width:100%; overflow:hidden; touch-action:pan-y pinch-zoom; }
.slider-images { 
	position:relative; width:100%; height:100%; 
	display: flex;
	transition: transform 0.4s ease;
}
.slider-image { 
	position:relative; 
	flex-shrink: 0;
	width:100%; 
	height:100%; 
	object-fit:cover; 
	filter: brightness(0.95); 
}
.slider-btn { position:absolute; top:50%; transform:translateY(-50%); z-index:2; background:color-mix(in oklab, var(--bg), transparent 40%); backdrop-filter:blur(4px); border:none; color:var(--text); width:36px; height:36px; border-radius:50%; cursor:pointer; font-size:20px; font-weight:700; line-height:1; display:flex; align-items:center; justify-content:center; opacity:0.8; transition:opacity 0.2s ease, background 0.2s ease; box-shadow:0 2px 8px rgba(0,0,0,0.2); }
.slider-btn:hover { opacity:1; background:color-mix(in oklab, var(--bg), transparent 20%); }
.slider-btn:active { transform:translateY(-50%) scale(0.95); }
.slider-btn-prev { left:8px; }
.slider-btn-next { right:8px; }
@media (prefers-color-scheme: light) {
	.slider-btn { background:color-mix(in oklab, #fff, transparent 60%); color:var(--text); }
	.slider-btn:hover { background:color-mix(in oklab, #fff, transparent 40%); }
}
.card-body { padding:12px 14px 14px; }
.card-route { display:flex; align-items:center; gap:8px; font-weight:700; }
.badge { font-size:12px; padding:2px 8px; border-radius:999px; background: color-mix(in oklab, var(--brand), transparent 85%); border:1px solid color-mix(in oklab, var(--brand), transparent 60%); color:inherit; }
.card-meta { margin-top:4px; color: var(--muted); font-size:14px; display:flex; gap:8px; flex-wrap:wrap; line-height:1.3; }
.card-meta span:first-child { font-weight: 700; color: var(--text); }
.card-airline { margin-top:4px; color: var(--muted); font-size:14px; line-height:1.3; }
.card-price { margin-top:4px; display:flex; align-items:baseline; gap:8px; line-height:1.2; }
.card-price strong { font-size:22px; }
.card-cta {
	margin-top:10px; display:flex; gap:8px; flex-wrap:wrap;
}
.button, .link {
	text-decoration:none; font-weight:700; border-radius:12px; padding:10px 12px;
	display:inline-flex; align-items:center; justify-content:center; gap:8px; cursor:pointer;
}
.button { background: var(--brand); color:#05202a; border:1px solid color-mix(in oklab, var(--brand), transparent 40%); box-shadow: none; }
.button:hover { background: color-mix(in oklab, var(--brand), #000 10%); }
.button:focus-visible { outline: none; box-shadow: var(--ring); }
.link { background: transparent; color: inherit; border:1px solid color-mix(in oklab, var(--text), transparent 80%); }
.link:hover { border-color: color-mix(in oklab, var(--brand), transparent 35%); background: color-mix(in oklab, var(--brand), transparent 92%); }

.more { text-align:center; margin:24px 0 8px; }

.site-footer { border-top:1px solid color-mix(in oklab, var(--text), transparent 85%); margin-top:40px; }
.site-footer .wrap { display:flex; align-items:center; justify-content:space-between; padding:18px 0; }
.site-footer nav a { color:inherit; opacity:.8; text-decoration:none; margin-left:16px; }
.site-footer nav a:hover { opacity:1; }

.sr-only {
	position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0,0,0,0); white-space:nowrap; border:0;
}

/* content + sidebar layout */
.content-with-sidebar { display:grid; grid-template-columns: 1fr 320px; gap: 28px; align-items:start; margin-top: 8px; }
.sidebar { position: sticky; top: 72px; }
.widget { background: linear-gradient(180deg, color-mix(in oklab, var(--panel), transparent 0%), color-mix(in oklab, var(--brand-4), transparent 96%)); border:1px solid color-mix(in oklab, var(--text), transparent 85%); border-radius: 14px; padding: 14px; }
.widget-title { margin: 0 0 10px; font-size: 16px; opacity: .9; }
.post-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.post-item { display:flex; gap:10px; align-items:center; text-decoration:none; color: inherit; }
.post-thumb { width: 96px; height: 54px; object-fit: cover; border-radius: 8px; border:1px solid color-mix(in oklab, var(--text), transparent 85%); }
.post-meta { display:flex; flex-direction:column; gap:4px; }
.post-title { font-weight: 700; line-height: 1.2; }
.post-date { color: var(--muted); font-size: 12px; }

@media (max-width: 900px) {
	.hero-inner { grid-template-columns: 1fr; }
	.filters { flex-wrap: wrap; }
	.content-with-sidebar { grid-template-columns: 1fr; }
	.sidebar { position: static; }
	.section-head { top: 53px; margin-top: -1px; padding: 12px 0 10px; }
	.filters select { padding: 8px 12px; padding-right: 32px; font-size: 13px; }
}

@media (max-width: 640px) {
	/* スマホ向け：カードを横長レイアウトに */
	.filters select { 
		padding: 10px 12px; 
		padding-right: 32px; 
		font-size: 13px; 
		min-height: 44px;
	}
	.deal-grid {
		grid-template-columns: 1fr;
		gap: 12px;
	}
	.card {
		display: flex;
		flex-direction: row;
		gap: 0;
		align-items: stretch;
	}
	.card-thumb,
	.card-thumb-slider {
		flex: 0 0 40%;
		aspect-ratio: 3 / 2;
		min-width: 0;
		height: auto;
		border-radius: 16px 0 0 16px;
		display: flex;
		flex-direction: column;
	}
	.card-thumb-slider {
		display: flex;
		flex-direction: column;
	}
	.card-thumb-slider .slider-images {
		height: auto;
		flex: 1;
		min-height: 0;
	}
	.card-thumb-slider .slider-buttons {
		display: flex;
		flex-direction: row;
		width: 100%;
	}
	.card-thumb-slider .slider-btn {
		position: relative;
		top: auto;
		left: auto;
		right: auto;
		transform: none;
		width: 50%;
		height: 32px;
		flex: 1;
		background: color-mix(in oklab, var(--panel), transparent 20%);
		border-radius: 0;
		margin: 0;
		opacity: 1;
		box-shadow: none;
	}
	.card-thumb-slider .slider-btn-prev {
		border-right: 1px solid color-mix(in oklab, var(--text), transparent 85%);
		border-radius: 0 0 0 16px;
	}
	.card-thumb-slider .slider-btn-next {
		border-radius: 0 0 16px 0;
	}
	.card-body {
		flex: 1;
		padding: 8px 12px;
		min-width: 0;
		display: flex;
		flex-direction: column;
		justify-content: space-between;
		gap: 0;
	}
	.card-route {
		font-size: 13px;
		gap: 6px;
		margin-bottom: 0;
		line-height: 1.1;
	}
	.badge {
		font-size: 10px;
		padding: 2px 6px;
	}
	.card-meta {
		font-size: 11px;
		margin-top: 0;
		gap: 6px;
		line-height: 1.1;
	}
	.card-meta span:first-child {
		font-weight: 700;
		color: var(--text);
	}
	.card-airline {
		font-size: 11px;
		margin-top: 0;
		line-height: 1.1;
	}
	.card-price {
		margin-top: 1px;
		gap: 6px;
		line-height: 1.1;
	}
	.card-price strong {
		font-size: 18px;
	}
	.card-price .muted {
		font-size: 11px;
	}
	.card-cta {
		margin-top: 6px;
	}
	.button {
		font-size: 12px;
		padding: 8px 10px;
	}
}

@media (min-width: 1200px) {
	/* ensure 3 columns for deals on wide screens */
	.deal-grid { grid-template-columns: repeat(3, 1fr); }
}