/* CSS Reset */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Roboto', sans-serif; line-height: 1.6; background-color: #ecf0f1; color: #2c3e50; }

/* iOSのプルダウン更新抑止（対応ブラウザ） */
html, body {
	overscroll-behavior-y: none;
}

:root {
	--primary-color: #2c3e50;
	--secondary-color: #34495e;
	--background-color: #ecf0f1;
	--card-bg-color: #ffffff;
	--card-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
	--card-shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.15);
	--border-radius: 10px;
	--gap: 1rem;
	--transition-speed: 0.3s;
	--button-bg: transparent;
	--button-hover-bg: rgba(44, 62, 80, 0.1);
	--button-color: var(--primary-color);
	--button-active-color: var(--primary-color);
	--button-active-underline: 3px solid var(--primary-color);
	--header-height: 60px;
}

/* ヘッダー */
header {
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	background: rgba(236, 240, 241, 0.95);
	padding: 0.5rem 1rem;
	display: flex;
	justify-content: center;
	align-items: center;
	gap: var(--gap);
	z-index: 1000;
	transition: padding var(--transition-speed), background-color var(--transition-speed), box-shadow var(--transition-speed);
	height: var(--header-height);
}
header.scrolled {
	padding: 0.25rem 1rem;
	background: rgba(236, 240, 241, 0.9);
	box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}
/* 横スクロールの有無を示す左右フェード */
header::before,
header::after {
	content: "";
	position: absolute;
	top: 0;
	bottom: 0;
	width: 28px;
	pointer-events: none;
	opacity: 0;
	transition: opacity var(--transition-speed);
}
header::before {
	left: 0;
	background: linear-gradient(to right, rgba(236,240,241,0.95), rgba(236,240,241,0));
}
header::after {
	right: 0;
	background: linear-gradient(to left, rgba(236,240,241,0.95), rgba(236,240,241,0));
}
header.fade-left::before { opacity: 1; }
header.fade-right::after { opacity: 1; }
nav {
	display: flex;
	gap: var(--gap);
	overflow-x: auto;
	overflow-y: hidden;
	-webkit-overflow-scrolling: touch;
	flex-wrap: nowrap;
}
nav button {
	background: var(--button-bg);
	border: none;
	padding: 0.5rem 1rem;
	font-size: 1rem;
	color: var(--button-color);
	cursor: pointer;
	transition: background var(--transition-speed), color var(--transition-speed);
	border-radius: 5px;
	flex: 0 0 auto;
}
nav button:hover {
	background: var(--button-hover-bg);
}
nav button.active {
	color: var(--button-active-color);
	border-bottom: var(--button-active-underline);
	border-bottom-left-radius: 0;
	border-bottom-right-radius: 0;
}
nav button:focus {
	outline: none;
	box-shadow: 0 0 0 2px var(--primary-color);
}

/* メインコンテンツ */
main {
	padding-top: calc(var(--header-height) + 1rem);
	max-width: 1200px;
	margin: 0 auto;
	padding-left: 1rem;
	padding-right: 1rem;
}
.search-bar { display: none; margin: 0 0 0.75rem 0; }
.search-input {
	width: 100%;
	padding: 0.65rem 0.9rem;
	border: 1px solid rgba(0,0,0,0.12);
	border-radius: 8px;
	font-size: 1rem;
	background: #fff;
	color: var(--primary-color);
	box-shadow: 0 1px 2px rgba(0,0,0,0.04) inset;
}
.search-input:focus {
	outline: none;
	border-color: var(--primary-color);
	box-shadow: 0 0 0 3px rgba(44,62,80,0.1);
}
.container {
	display: grid;
	gap: var(--gap);
	grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
	margin-bottom: 2rem;
}

a { text-decoration: none; color: var(--primary-color); }

.error-message {
	display: none;
	color: #e74c3c;
	text-align: center;
	margin-top: 1rem;
	font-weight: 500;
}

/* カード */
.card {
	background-color: var(--card-bg-color);
	border-radius: var(--border-radius);
	box-shadow: var(--card-shadow);
	padding: 1.25rem;
	text-align: center;
	transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}
.card:hover {
	transform: translateY(-4px);
	box-shadow: var(--card-shadow-hover);
}
.card.single-column { grid-column: span 1; }

h2 {
	font-size: 1.5rem;
	margin-bottom: 0.75rem;
	color: var(--secondary-color);
}
p, span {
	font-size: 1rem;
	margin: 0.5rem 0;
}

/* 天気カード専用 */
.weather-card p {
	display: flex;
	justify-content: space-around;
	align-items: center;
	gap: var(--gap);
	margin: 0.5rem 0;
}
.weather-card p span {
	flex: 1;
	display: flex;
	align-items: center;
	font-weight: 500;
}
.weather-card p span::before {
	content: attr(data-icon);
	margin-right: 0.25rem;
}

.weather-map {
	width: 100%;
	border-radius: var(--border-radius);
}

/* レスポンシブ調整 */
@media (max-width: 768px) {
	h2 { font-size: 1.25rem; }
	p, span { font-size: 0.875rem; }
}
@media (max-width: 375px) {
	:root { --gap: 0.5rem; }
	.container { grid-template-columns: repeat(2, 1fr); }
	.card.single-column { grid-column: span 2; }
	h2 { font-size: 1.25rem; }
	p, span { font-size: 1rem; }
	.card { padding: 1rem; }
}