/* ===================================================
   budsblue tools — common/style.css
   サイト全体のベーススタイル＋共通UIパーツ
   ツール固有のスタイルはここに書かない（各ページ側で管理）
=================================================== */

:root {
	--key-color: #0d3258;
	--key-color-hover: #0a2745;
	--bg-gray: #f7f8fa;
	--text-main: #1a1a1a;
	--text-sub: #666;
	--text-faint: #888;
	--border-color: #e0ddd6;
	--card-bg: #fff;
}

/* ---- Reset & Base ---- */
* {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}
body {
	font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic UI", sans-serif;
	background: var(--bg-gray);
	color: var(--text-main);
	min-height: 100vh;
	display: flex;
	flex-direction: column;
}
a {
	color: var(--key-color);
	text-decoration: none;
}
a:hover {
	text-decoration: underline;
}

/* ---- Header ---- */
.site-header {
	background: #fff;
	border-bottom: 1px solid var(--border-color);
	padding: 0.75rem 1.5rem;
	display: flex;
	align-items: center;
	gap: 1rem;
}
.site-header .logo {
	font-size: 16px;
	font-weight: 500;
	color: var(--key-color);
	text-decoration: none;
}
.site-header .logo:hover {
	text-decoration: none;
	opacity: 0.7;
}
.site-header nav {
	font-size: 13px;
	color: #888;
}
.site-header nav a {
	color: #555;
}
.site-header nav a:hover {
	color: var(--key-color);
}

/* ---- Main / Page common ---- */
main {
	flex: 1;
	max-width: 980px;
	width: 100%;
	margin: 0 auto;
	padding: 2rem 1.25rem;
}
.page-title {
	font-size: 22px;
	font-weight: 500;
	margin-bottom: 1.5rem;
	color: var(--text-main);
}
.page-desc {
	font-size: 14px;
	color: var(--text-sub);
	margin-bottom: 1.75rem;
	line-height: 1.7;
}

/* ---- Footer ---- */
.site-footer {
	background: #fff;
	border-top: 1px solid var(--border-color);
	padding: 1rem 1.5rem;
	text-align: center;
	font-size: 12px;
	color: #999;
	margin-top: auto;
}
.site-footer a {
	color: #888;
}

/* ---- Common UI parts (used across multiple tools) ---- */

/* Buttons */
.btn {
	font-size: 13px;
	padding: 6px 16px;
	border-radius: 8px;
	border: 1px solid #ccc;
	background: transparent;
	color: var(--text-main);
	cursor: pointer;
	font-family: inherit;
}
.btn:hover {
	background: #ececf0;
}
.btn:active {
	transform: scale(0.98);
}
.btn.primary {
	background: var(--key-color);
	color: #fff;
	border-color: var(--key-color);
}
.btn.primary:hover {
	background: var(--key-color-hover);
}

/* Toolbar (button row used on every tool page) */
.toolbar {
	display: flex;
	gap: 8px;
	margin: 10px 0;
	flex-wrap: wrap;
	align-items: center;
}

/* Stat cards (used by strcount, and future tools showing metrics) */
.stats {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
	gap: 10px;
	margin-top: 1rem;
}
.stat {
	background: #eef1f5;
	border-radius: 8px;
	padding: 0.75rem 1rem;
}
.stat-label {
	font-size: 12px;
	color: var(--text-sub);
	margin-bottom: 4px;
}
.stat-value {
	font-size: 22px;
	font-weight: 500;
	color: var(--key-color);
	line-height: 1.2;
}
.stat-unit {
	font-size: 13px;
	font-weight: 400;
	color: #888;
	margin-left: 3px;
}

/* Section title (small label above a sub-section) */
.section-title {
	font-size: 13px;
	font-weight: 500;
	color: var(--text-sub);
	margin: 1.25rem 0 0.5rem;
	letter-spacing: 0.03em;
}

/* Tool index cards (tools/index.html) */
.tool-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
	gap: 12px;
}
.tool-card {
	background: var(--card-bg);
	border: 1px solid var(--border-color);
	border-radius: 10px;
	padding: 1.25rem;
	text-decoration: none;
	color: inherit;
	display: block;
	transition:
		border-color 0.15s,
		box-shadow 0.15s;
}
.tool-card:hover {
	border-color: var(--key-color);
	box-shadow: 0 2px 8px rgba(13, 50, 88, 0.08);
	text-decoration: none;
}
.tool-card-icon {
	font-size: 28px;
	margin-bottom: 0.6rem;
}
.tool-card-name {
	font-size: 15px;
	font-weight: 500;
	margin-bottom: 0.3rem;
	color: var(--text-main);
}
.tool-card-desc {
	font-size: 13px;
	color: #888;
	line-height: 1.5;
}

/* Generic textarea (used by strcount, diff, and future text tools) */
.text-input {
	width: 100%;
	resize: vertical;
	padding: 12px;
	font-size: 15px;
	line-height: 1.7;
	border: 1px solid #ccc;
	border-radius: 10px;
	background: #fff;
	color: var(--text-main);
	font-family: inherit;
	min-height: 180px;
	outline: none;
	transition: border-color 0.15s;
	box-sizing: border-box;
}
.text-input:focus {
	border-color: var(--key-color);
}
.text-input.mono {
	font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
	font-size: 13px;
	min-height: 160px;
}

/* Result/value cards in a horizontal grid (byte counts, etc.) */
.card-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
	gap: 8px;
}
.card-item {
	background: #fff;
	border: 1px solid #ddd;
	border-radius: 8px;
	padding: 0.6rem 0.8rem;
	display: flex;
	justify-content: space-between;
	align-items: baseline;
}
.card-item .label {
	font-size: 12px;
	color: #888;
}
.card-item .value {
	font-size: 14px;
	font-weight: 500;
	color: var(--key-color);
}

/* Badges (e.g. diff summary +N / -N) */
.badge {
	display: inline-block;
	padding: 2px 8px;
	border-radius: 6px;
	font-size: 11px;
	margin-right: 6px;
}
.badge.del {
	background: #faece7;
	color: #993c1d;
}
.badge.ins {
	background: #eaf3de;
	color: #3b6d11;
}

/* ---- SEO content sections (description / how-to-use / FAQ / related) ---- */
.tool-article{
	margin-top:3rem;
	padding-top:2rem;
	border-top:1px solid var(--border-color);
}
.tool-article h2{
	font-size:18px;
	font-weight:600;
	color:var(--text-main);
	margin:2rem 0 .9rem;
}
.tool-article h2:first-child{margin-top:0}
.tool-article h3{
	font-size:15px;
	font-weight:600;
	color:var(--text-main);
	margin:1.5rem 0 .6rem;
}
.tool-article p{
	font-size:14px;
	color:var(--text-sub);
	line-height:1.85;
	margin-bottom:.9rem;
}
.tool-article ul,
.tool-article ol{
	font-size:14px;
	color:var(--text-sub);
	line-height:1.85;
	margin:0 0 .9rem 1.4rem;
}
.tool-article li{margin-bottom:.3rem}
.tool-article strong{color:var(--text-main);font-weight:600}

/* How-to-use numbered steps */
.howto-steps{list-style:none;margin:0 0 1rem;padding:0;counter-reset:step}
.howto-steps li{
	position:relative;
	padding-left:2.1rem;
	margin-bottom:.9rem;
	counter-increment:step;
	font-size:14px;
	color:var(--text-sub);
	line-height:1.75;
}
.howto-steps li::before{
	content:counter(step);
	position:absolute;
	left:0;
	top:0;
	width:1.5rem;
	height:1.5rem;
	border-radius:50%;
	background:var(--key-color);
	color:#fff;
	font-size:12px;
	font-weight:600;
	display:flex;
	align-items:center;
	justify-content:center;
}
.howto-steps li strong{display:block;color:var(--text-main);margin-bottom:.15rem}

/* FAQ accordion-like blocks (no JS needed; just styled) */
.faq-item{
	border:1px solid var(--border-color);
	border-radius:8px;
	padding:1rem 1.1rem;
	margin-bottom:.7rem;
	background:var(--card-bg);
}
.faq-q{
	font-size:14px;
	font-weight:600;
	color:var(--text-main);
	margin-bottom:.4rem;
	display:flex;
	gap:.5rem;
}
.faq-q::before{content:"Q";color:var(--key-color);flex-shrink:0}
.faq-a{
	font-size:13px;
	color:var(--text-sub);
	line-height:1.8;
	display:flex;
	gap:.5rem;
	margin:0;
}
.faq-a::before{content:"A";color:#999;flex-shrink:0}

/* Use-case cards (SNS / blog / report etc.) */
.usecase-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin-bottom:1rem}
.usecase-card{
	background:var(--card-bg);
	border:1px solid var(--border-color);
	border-radius:8px;
	padding:1rem 1.1rem;
}
.usecase-card h3{margin:0 0 .5rem;font-size:14px}
.usecase-card p,
.usecase-card ul{font-size:13px;margin-bottom:0}

/* Related tools list */
.related-tools{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:0}
.related-tools a{
	font-size:13px;
	padding:6px 14px;
	border-radius:20px;
	border:1px solid var(--border-color);
	color:var(--text-main);
	text-decoration:none;
	background:var(--card-bg);
}
.related-tools a:hover{
	border-color:var(--key-color);
	color:var(--key-color);
	text-decoration:none;
}

/* Responsive: stack 2-column layouts on narrow screens */
@media (max-width: 600px) {
	.two-col {
		grid-template-columns: 1fr;
	}
}

/* ---- Dark mode ---- */
@media (prefers-color-scheme: dark) {
	:root {
		--key-color: #5b9bd5;
		--key-color-hover: #7bb0e0;
		--bg-gray: #161c22;
		--text-main: #e8e6de;
		--text-sub: #999;
		--text-faint: #777;
		--border-color: #2a3744;
		--card-bg: #1d2530;
	}
	body {
		background: var(--bg-gray);
		color: var(--text-main);
	}
	a {
		color: var(--key-color);
	}

	.site-header {
		background: #1d2530;
		border-color: var(--border-color);
	}
	.site-header .logo {
		color: var(--key-color);
	}
	.site-header nav a {
		color: #aaa;
	}
	.site-header nav a:hover {
		color: var(--key-color);
	}

	.page-title {
		color: var(--text-main);
	}
	.page-desc {
		color: var(--text-sub);
	}

	.site-footer {
		background: #1d2530;
		border-color: var(--border-color);
	}

	.btn {
		border-color: #3a4552;
		color: var(--text-main);
	}
	.btn:hover {
		background: #2a3441;
	}
	.btn.primary {
		background: var(--key-color);
		color: #0d1620;
		border-color: var(--key-color);
	}
	.btn.primary:hover {
		background: var(--key-color-hover);
	}

	.stat {
		background: #1d2530;
	}
	.stat-label {
		color: var(--text-sub);
	}
	.stat-value {
		color: var(--key-color);
	}
	.stat-unit {
		color: #777;
	}

	.section-title {
		color: var(--text-sub);
	}

	.tool-card {
		background: var(--card-bg);
		border-color: var(--border-color);
	}
	.tool-card:hover {
		border-color: var(--key-color);
	}
	.tool-card-name {
		color: var(--text-main);
	}

	.text-input {
		background: #1d2530;
		border-color: #3a4552;
		color: var(--text-main);
	}
	.text-input:focus {
		border-color: var(--key-color);
	}

	.card-item {
		background: #1d2530;
		border-color: #2a3744;
	}
	.card-item .label {
		color: #777;
	}
	.card-item .value {
		color: var(--key-color);
	}

	.badge.del {
		background: #4a1b0c;
		color: #f0997b;
	}
	.badge.ins {
		background: #173404;
		color: #97c459;
	}
}