/* =========================================================
   Common CSS — My Theme  (Navy #1a3a5c x White)
   ========================================================= */

/* Custom Properties */
:root {
	--navy:        #1a3a5c;
	--navy-dark:   #122a44;
	--navy-light:  #2a5a8c;
	--navy-pale:   #e8eef5;
	--white:       #ffffff;
	--bg:          #f5f7fa;
	--text:        #333333;
	--muted:       #777777;
	--border:      #dde4ee;
	--radius:      6px;
	--shadow:      0 2px 12px rgba(26,58,92,.1);
	--container:   1200px;
	--px:          1.5rem;
	--sidebar-w:   280px;
	--header-h:    68px;
	--ease:        .2s ease;
}

/* Base */
body {
	font-family: 'Noto Sans JP','Hiragino Kaku Gothic ProN','Hiragino Sans',Meiryo,sans-serif;
	color: var(--text);
	background: var(--bg);
}

/* Layout */
.container { max-width: var(--container); margin: 0 auto; padding: 0 var(--px); }
.site-wrap  { display: flex; flex-direction: column; min-height: 100vh; }
.site-content { flex: 1; padding: 3rem 0; }
.content-area { display: flex; gap: 2.5rem; align-items: flex-start; }
.main-content { flex: 1; min-width: 0; }

body:not(.has-sidebar) .sidebar { display: none; }
body:not(.has-sidebar) .main-content { max-width: 860px; margin: 0 auto; }

/* =========================================================
   Header
   ========================================================= */
.site-header {
	background: var(--navy);
	color: var(--white);
	position: sticky; top: 0; z-index: 100;
	box-shadow: 0 2px 8px rgba(0,0,0,.2);
}
.site-header__inner {
	display: flex; align-items: center;
	justify-content: space-between;
	height: var(--header-h); gap: 1.5rem;
}
.site-branding { flex-shrink: 0; }
.site-logo img { height: 44px; width: auto; }
.site-title { font-size: 1.25rem; font-weight: 700; letter-spacing: .04em; }
.site-title a { color: var(--white); }
.site-description { font-size: .7rem; opacity: .65; margin-top: .125rem; }

.site-navigation .nav-menu { display: flex; align-items: center; gap: .125rem; }
.site-navigation .nav-menu a {
	display: block; color: rgba(255,255,255,.85);
	padding: .4rem .875rem; border-radius: var(--radius);
	font-size: .875rem; font-weight: 500;
	transition: color var(--ease), background var(--ease);
}
.site-navigation .nav-menu a:hover,
.site-navigation .nav-menu .current-menu-item > a,
.site-navigation .nav-menu .current-menu-ancestor > a {
	color: var(--white); background: rgba(255,255,255,.14);
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer { background: var(--navy-dark); color: var(--white); }
.site-footer__widgets { padding: 3rem 0 2.5rem; border-bottom: 1px solid rgba(255,255,255,.08); }
.footer-widget-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 2rem; }
.site-footer .widget { color: rgba(255,255,255,.7); font-size: .875rem; line-height: 1.8; background: none; border: none; padding: 0; }
.site-footer .widget-title { color: var(--white); border-bottom-color: rgba(255,255,255,.25); font-size: .85rem; letter-spacing: .06em; }
.site-footer .widget a { color: rgba(255,255,255,.7); transition: color var(--ease); }
.site-footer .widget a:hover { color: var(--white); }
.site-footer__bottom { padding: 1.25rem 0; text-align: center; }
.site-footer__bottom .copyright { font-size: .78rem; opacity: .5; }

/* SNS links */
.sns-links { display: flex; justify-content: center; align-items: center; gap: .75rem; margin: 0 0 1rem; padding: 0; list-style: none; }
.sns-links__link {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 36px;
	height: 36px;
	border-radius: 50%;
	color: var(--white);
	background: rgba(255,255,255,.12);
	transition: background var(--ease), color var(--ease);
}
.sns-links__link:hover { background: var(--white); color: var(--navy); }
.sns-links__link svg { display: block; }

/* =========================================================
   Sidebar / Widgets
   ========================================================= */
.sidebar { width: var(--sidebar-w); flex-shrink: 0; }
.widget { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.25rem; margin-bottom: 1.5rem; }
.widget-title { font-size: .875rem; font-weight: 700; color: var(--navy); padding-bottom: .5rem; border-bottom: 2px solid var(--navy); margin-bottom: .875rem; letter-spacing: .04em; }
.widget ul li { padding: .3rem 0; border-bottom: 1px solid var(--border); font-size: .875rem; }
.widget ul li:last-child { border-bottom: none; }
.widget ul li a:hover { color: var(--navy); }

/* =========================================================
   Archive / Blog
   ========================================================= */
.archive-header { margin-bottom: 2rem; padding-bottom: 1rem; border-bottom: 2px solid var(--border); }
.archive-title { font-size: 1.5rem; font-weight: 700; color: var(--navy); }
.archive-description { color: var(--muted); margin-top: .5rem; font-size: .9rem; }

.posts-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 1.5rem; }
.post-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: box-shadow var(--ease), transform var(--ease); }
.post-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.post-card__thumb { display: block; overflow: hidden; }
.post-card__thumb img { width: 100%; aspect-ratio: 16/9; object-fit: cover; transition: transform .35s ease; }
.post-card:hover .post-card__thumb img { transform: scale(1.04); }
.post-card__thumb--placeholder { aspect-ratio: 16/9; background: var(--navy-pale); }
.post-card__body { padding: 1.125rem; }
.post-card__cat { display: inline-block; font-size: .7rem; font-weight: 700; color: var(--navy); background: var(--navy-pale); padding: .2rem .625rem; border-radius: 20px; margin-bottom: .5rem; }
.post-card__title { font-size: 1rem; font-weight: 700; line-height: 1.5; margin-bottom: .375rem; }
.post-card__title a:hover { color: var(--navy); }
.post-card__meta { font-size: .75rem; color: var(--muted); margin-bottom: .5rem; }
.post-card__excerpt { font-size: .85rem; color: #555; line-height: 1.7; }

/* =========================================================
   Single / Page
   ========================================================= */
.entry { background: var(--white); border-radius: var(--radius); overflow: hidden; }
.entry-thumbnail { aspect-ratio: 16/6; overflow: hidden; }
.entry-thumbnail img { width: 100%; height: 100%; object-fit: cover; }
.entry-inner { padding: 2rem 2.5rem; }
.entry-header { margin-bottom: 2rem; padding-bottom: 1.5rem; border-bottom: 1px solid var(--border); }
.entry-category { display: inline-block; font-size: .7rem; font-weight: 700; color: var(--navy); background: var(--navy-pale); padding: .2rem .75rem; border-radius: 20px; margin-bottom: .875rem; }
.entry-title { font-size: 1.75rem; font-weight: 700; line-height: 1.45; color: var(--navy); margin-bottom: 1rem; }
.entry-meta { font-size: .78rem; color: var(--muted); display: flex; gap: 1rem; flex-wrap: wrap; }
.entry-content { line-height: 1.9; color: var(--text); }
.entry-content h2 { font-size: 1.375rem; font-weight: 700; color: var(--navy); margin: 2.5rem 0 1rem; padding-left: .875rem; border-left: 4px solid var(--navy); }
.entry-content h3 { font-size: 1.125rem; font-weight: 700; color: var(--navy); margin: 2rem 0 .75rem; padding-bottom: .375rem; border-bottom: 1px solid var(--border); }
.entry-content h4 { font-size: 1rem; font-weight: 700; margin: 1.5rem 0 .5rem; }
.entry-content p { margin-bottom: 1.375rem; }
.entry-content ul, .entry-content ol { margin: 0 0 1.375rem 1.5rem; }
.entry-content ul { list-style: disc; }
.entry-content ol { list-style: decimal; }
.entry-content li { margin-bottom: .5rem; line-height: 1.75; }
.entry-content a { color: var(--navy); text-decoration: underline; text-underline-offset: 2px; }
.entry-content a:hover { opacity: .75; }
.entry-content img { border-radius: var(--radius); margin: 1.25rem 0; }
.entry-content blockquote { margin: 1.75rem 0; padding: 1rem 1.5rem; background: var(--bg); border-left: 4px solid var(--navy); color: #555; }
.entry-content table { width: 100%; margin-bottom: 1.5rem; font-size: .9rem; }
.entry-content th { background: var(--navy); color: var(--white); padding: .625rem .875rem; text-align: left; }
.entry-content td { padding: .625rem .875rem; border-bottom: 1px solid var(--border); }
.entry-content tr:nth-child(even) td { background: var(--bg); }
.entry-footer { margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid var(--border); font-size: .85rem; color: var(--muted); }

/* Post nav */
.post-navigation { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-top: 2rem; }
.nav-previous, .nav-next { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem 1.25rem; transition: box-shadow var(--ease); }
.nav-previous:hover, .nav-next:hover { box-shadow: var(--shadow); }
.nav-next { text-align: right; }
.nav-label { font-size: .7rem; color: var(--muted); display: block; margin-bottom: .25rem; letter-spacing: .06em; text-transform: uppercase; }
.nav-title { font-size: .9rem; font-weight: 600; color: var(--navy); line-height: 1.4; }

/* Pagination */
.pagination { display: flex; gap: .375rem; justify-content: center; flex-wrap: wrap; margin-top: 3rem; }
.pagination .page-numbers { display: flex; align-items: center; justify-content: center; min-width: 2.5rem; height: 2.5rem; padding: 0 .75rem; border: 1px solid var(--border); border-radius: var(--radius); font-size: .875rem; color: var(--text); background: var(--white); transition: background var(--ease), color var(--ease), border-color var(--ease); }
.pagination .page-numbers:hover { background: var(--navy-pale); border-color: var(--navy); color: var(--navy); }
.pagination .current { background: var(--navy); color: var(--white); border-color: var(--navy); }
.pagination .dots { border: none; background: none; }

/* 404 / No results */
.page-header { background: var(--navy); color: var(--white); padding: 3rem 0; margin-bottom: 2.5rem; }
.page-header__title { font-size: 2rem; font-weight: 700; }
.error-page { text-align: center; padding: 5rem 0; }
.error-page__code { font-size: 8rem; font-weight: 900; color: var(--navy); opacity: .1; line-height: 1; }
.error-page__title { font-size: 1.75rem; font-weight: 700; color: var(--navy); margin-bottom: .75rem; }
.error-page__text { color: var(--muted); margin-bottom: 2rem; }
.btn { display: inline-flex; align-items: center; gap: .5rem; background: var(--navy); color: var(--white); padding: .75rem 2rem; border-radius: var(--radius); font-weight: 600; font-size: .9375rem; transition: background var(--ease), transform var(--ease); }
.btn:hover { background: var(--navy-light); transform: translateY(-1px); }
.no-results { text-align: center; padding: 4rem 1rem; background: var(--white); border-radius: var(--radius); }
.no-results__title { font-size: 1.25rem; font-weight: 700; color: var(--navy); margin-bottom: .75rem; }
.no-results__text { color: var(--muted); }

/* Responsive */
@media (max-width: 960px) { .posts-grid { grid-template-columns: 1fr; } }
@media (max-width: 768px) {
	:root { --px: 1rem; }
	.content-area { flex-direction: column; }
	.sidebar { width: 100%; }
	.footer-widget-grid { grid-template-columns: 1fr; gap: 1.5rem; }
	.entry-inner { padding: 1.5rem; }
	.entry-title { font-size: 1.375rem; }
	.post-navigation { grid-template-columns: 1fr; }
	.page-header__title { font-size: 1.5rem; }
	.error-page__code { font-size: 5rem; }
}
@media (max-width: 480px) { .site-navigation { display: none; } }