/**
 * YELL Theme - Main Stylesheet
 * 
 * 基本的なスタイル定義
 * ビルドツールを使う場合、このファイルは dist/css/style.css に出力されます
 */

/* ========================================
   CSS Custom Properties (変数)
   ======================================== */
:root {
	/* カラー */
	--yl-color-primary: #3B82F6;
	--yl-color-secondary: #10B981;
	--yl-color-accent: #F59E0B;
	--yl-color-dark: #1F2937;
	--yl-color-light: #F3F4F6;
	--yl-color-text: #1F2937;
	--yl-color-bg: #FFFFFF;

	/* フォント */
	--yl-font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Noto Sans JP", sans-serif;
	--yl-font-mono: Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

	/* サイズ */
	--yl-site-width: 1200px;
	--yl-content-width: 800px;
	--yl-sidebar-width: 320px;
	--yl-spacing: 1rem;
	--yl-spacing-sm: 0.5rem;
	--yl-spacing-lg: 2rem;
	--yl-spacing-xl: 3rem;

	/* その他 */
	--yl-border-radius: 0.375rem;
	--yl-transition: all 0.3s ease;
}

/* ========================================
   リセット・基本スタイル
   ======================================== */
*,
*::before,
*::after {
	box-sizing: border-box;
}

body {
	margin: 0;
	padding: 0;
	font-family: var(--yl-font-sans);
	font-size: 16px;
	line-height: 1.8;
	color: var(--yl-color-text);
	background-color: var(--yl-color-bg);
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

/* ========================================
   レイアウト
   ======================================== */
.yl-site {
	display: flex;
	flex-direction: column;
	min-height: 100vh;
}

.yl-container {
	max-width: var(--yl-site-width);
	margin: 0 auto;
	padding: 0 var(--yl-spacing);
	width: 100%;
}

.yl-content-area {
	flex: 1;
}

/* ========================================
   ヘッダー
   ======================================== */
.yl-site-header {
	background-color: var(--yl-color-bg);
	border-bottom: 1px solid var(--yl-color-light);
	padding: var(--yl-spacing) 0;
}

.yl-header-inner {
	display: flex;
	justify-content: space-between;
	align-items: center;
	max-width: var(--yl-site-width);
	margin: 0 auto;
	padding: 0 var(--yl-spacing);
}

.yl-site-branding {
	flex: 0 0 auto;
}

.yl-site-title {
	margin: 0;
	font-size: 1.5rem;
	font-weight: 700;
}

.yl-site-title a {
	color: var(--yl-color-text);
	text-decoration: none;
}

.yl-site-description {
	margin: 0.25rem 0 0;
	font-size: 0.875rem;
	color: #6B7280;
}

/* ナビゲーション */
.yl-main-navigation {
	flex: 1 1 auto;
	margin-left: var(--yl-spacing-lg);
}

.yl-menu {
	display: flex;
	list-style: none;
	margin: 0;
	padding: 0;
	gap: var(--yl-spacing);
}

.yl-menu a {
	color: var(--yl-color-text);
	text-decoration: none;
	padding: 0.5rem 1rem;
	transition: var(--yl-transition);
}

.yl-menu a:hover {
	color: var(--yl-color-primary);
}

/* モバイルメニュー */
.yl-menu-toggle {
	display: none;
	background: none;
	border: none;
	padding: 0.5rem;
	cursor: pointer;
}

@media (max-width: 768px) {
	.yl-menu-toggle {
		display: block;
	}

	.yl-menu-wrapper {
		display: none;
	}

	.yl-menu-wrapper.is-active {
		display: block;
		position: absolute;
		top: 100%;
		left: 0;
		right: 0;
		background: var(--yl-color-bg);
		box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
	}

	.yl-menu {
		flex-direction: column;
	}
}

/* ========================================
   フッター
   ======================================== */
.yl-site-footer {
	background-color: var(--yl-color-dark);
	color: #FFFFFF;
	padding: var(--yl-spacing-xl) 0 var(--yl-spacing);
	margin-top: auto;
}

.yl-footer-inner {
	max-width: var(--yl-site-width);
	margin: 0 auto;
	padding: 0 var(--yl-spacing);
}

.yl-footer-widgets {
	margin-bottom: var(--yl-spacing-lg);
}

.yl-footer-widget-area {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
	gap: var(--yl-spacing-lg);
}

.yl-copyright {
	text-align: center;
	font-size: 0.875rem;
	opacity: 0.8;
	margin-top: var(--yl-spacing);
}

/* ========================================
   投稿一覧
   ======================================== */
.yl-post-list {
	display: grid;
	gap: var(--yl-spacing-lg);
}

.yl-post-item {
	background: var(--yl-color-bg);
	border-radius: var(--yl-border-radius);
	overflow: hidden;
	box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
	transition: var(--yl-transition);
}

.yl-post-item:hover {
	box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.yl-post-thumbnail img {
	width: 100%;
	height: auto;
	display: block;
}

.yl-post-header,
.yl-post-content,
.yl-post-footer {
	padding: var(--yl-spacing);
}

.yl-post-title {
	margin: 0 0 var(--yl-spacing-sm);
	font-size: 1.5rem;
	line-height: 1.4;
}

.yl-post-title a {
	color: var(--yl-color-text);
	text-decoration: none;
}

.yl-post-title a:hover {
	color: var(--yl-color-primary);
}

/* ========================================
   ユーティリティ
   ======================================== */
.screen-reader-text {
	clip: rect(1px, 1px, 1px, 1px);
	position: absolute !important;
	height: 1px;
	width: 1px;
	overflow: hidden;
}

.skip-link:focus {
	clip: auto !important;
	display: block;
	height: auto;
	width: auto;
	z-index: 100000;
}