/*
 * WIM — Components
 *
 * Sprint 1 で実装する UI 部品の土台:
 *   - Buttons (primary gold / secondary outline / tech gradient)
 *   - Cards (paper card / dark tech card)
 *   - Badges
 *   - Accordion 土台
 *   - Code block
 *   - Fade-up animation utility
 *
 * @package WIM
 */

/* ============================================================
 * Buttons
 * ============================================================ */
.wim-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: var(--wim-space-2);
	min-height: 48px;
	padding: var(--wim-space-3) var(--wim-space-7);
	font-family: var(--wim-font-sans);
	font-size: var(--wim-fs-body);
	font-weight: var(--wim-weight-medium);
	letter-spacing: var(--wim-ls-body);
	text-decoration: none;
	border: 1px solid transparent;
	border-radius: var(--wim-radius-pill);
	cursor: pointer;
	transition:
		background-color var(--wim-dur-base) var(--wim-ease),
		color var(--wim-dur-base) var(--wim-ease),
		border-color var(--wim-dur-base) var(--wim-ease),
		box-shadow var(--wim-dur-base) var(--wim-ease),
		transform var(--wim-dur-base) var(--wim-ease);
}

.wim-btn:focus-visible {
	outline: var(--wim-focus-ring);
	outline-offset: var(--wim-focus-offset);
}

/* ---- Primary (gold solid) ---- */
.wim-btn--primary {
	background-color: var(--wim-gold);
	color: var(--wim-bg-paper);
	border-color: var(--wim-gold);
}
.wim-btn--primary:hover,
.wim-btn--primary:focus-visible {
	background-color: var(--wim-gold-dark);
	border-color: var(--wim-gold-dark);
	color: var(--wim-bg-paper);
	box-shadow: var(--wim-shadow-sm);
}

/* ---- Secondary (outline) ---- */
.wim-btn--secondary {
	background-color: transparent;
	color: var(--wim-ink);
	border-color: var(--wim-ink);
}
.wim-btn--secondary:hover,
.wim-btn--secondary:focus-visible {
	background-color: var(--wim-ink);
	color: var(--wim-bg-paper);
}

/* secondary on dark */
.wim-section--dark .wim-btn--secondary,
.wim-on-dark .wim-btn--secondary {
	color: var(--wim-ink-inverse);
	border-color: var(--wim-ink-inverse);
}
.wim-section--dark .wim-btn--secondary:hover,
.wim-on-dark .wim-btn--secondary:hover {
	background-color: var(--wim-ink-inverse);
	color: var(--wim-ink);
}

/* ---- Tech (gradient) ---- */
.wim-btn--tech {
	position: relative;
	background-image: var(--wim-gradient-tech);
	background-size: 200% 200%;
	background-position: 0% 50%;
	color: var(--wim-on-dark);
	border-color: transparent;
	box-shadow: var(--wim-shadow-tech);
}
.wim-btn--tech:hover,
.wim-btn--tech:focus-visible {
	background-position: 100% 50%;
	color: var(--wim-on-dark);
	transform: translateY(-1px);
}
.wim-btn--tech:active {
	transform: translateY(0);
}

/* ---- Sizes ---- */
.wim-btn--sm {
	min-height: 36px;
	padding: var(--wim-space-2) var(--wim-space-5);
	font-size: var(--wim-fs-caption);
}
.wim-btn--lg {
	min-height: 56px;
	padding: var(--wim-space-4) var(--wim-space-8);
	font-size: var(--wim-fs-lead);
}

.wim-btn--block {
	display: flex;
	width: 100%;
}

/* ============================================================
 * Cards
 * ============================================================ */
.wim-card {
	background-color: var(--wim-bg-paper);
	border: var(--wim-rule);
	border-radius: var(--wim-radius-md);
	padding: var(--wim-space-6);
	transition: box-shadow var(--wim-dur-base) var(--wim-ease),
				transform var(--wim-dur-base) var(--wim-ease),
				border-color var(--wim-dur-base) var(--wim-ease);
}
.wim-card:hover {
	box-shadow: var(--wim-shadow-md);
	transform: translateY(-2px);
	border-color: var(--wim-line-strong);
}

.wim-card__title {
	font-family: var(--wim-font-serif);
	font-size: var(--wim-fs-h4);
	font-weight: var(--wim-weight-bold);
	margin: 0 0 var(--wim-space-3);
}

.wim-card__body {
	color: var(--wim-ink);
	line-height: var(--wim-lh-body);
	margin: 0;
}

.wim-card--dark {
	background-color: var(--wim-bg-dark-soft);
	color: var(--wim-ink-inverse);
	border-color: var(--wim-line-on-dark-soft);
}
.wim-card--dark:hover {
	border-color: var(--wim-accent-cyan);
	box-shadow: var(--wim-shadow-tech);
}
.wim-card--dark .wim-card__title {
	color: var(--wim-ink-inverse);
}

.wim-card--feature {
	position: relative;
	overflow: hidden;
}
.wim-card--feature::before {
	content: "";
	position: absolute;
	left: 0;
	top: 0;
	height: 3px;
	width: 0;
	background: var(--wim-gradient-tech);
	transition: width var(--wim-dur-slow) var(--wim-ease-out);
}
.wim-card--feature:hover::before {
	width: 100%;
}

/* ============================================================
 * Badges
 * ============================================================ */
.wim-badge {
	display: inline-flex;
	align-items: center;
	gap: var(--wim-space-1);
	padding: 2px var(--wim-space-3);
	font-family: var(--wim-font-sans);
	font-size: var(--wim-fs-meta);
	font-weight: var(--wim-weight-medium);
	letter-spacing: var(--wim-ls-meta);
	text-transform: uppercase;
	border-radius: var(--wim-radius-pill);
	border: 1px solid var(--wim-line-strong);
	color: var(--wim-muted);
	background-color: transparent;
	white-space: nowrap;
}

.wim-badge--gold {
	color: var(--wim-gold-dark);
	background-color: var(--wim-gold-soft);
	border-color: transparent;
}

.wim-badge--tech {
	color: var(--wim-on-dark);
	background-image: var(--wim-gradient-tech);
	border-color: transparent;
}

.wim-badge--ghost-tech {
	color: var(--wim-accent-violet);
	background-color: var(--wim-violet-soft-bg);
	border-color: var(--wim-violet-soft-border);
}

/* ============================================================
 * Accordion (土台のみ; JS は accordion.js / Sprint 2)
 * ============================================================ */
.wim-accordion {
	border-top: var(--wim-rule);
}

.wim-accordion__item {
	border-bottom: var(--wim-rule);
}

.wim-accordion__trigger {
	width: 100%;
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--wim-space-4);
	padding: var(--wim-space-5) 0;
	font-family: var(--wim-font-serif);
	font-size: var(--wim-fs-h5);
	font-weight: var(--wim-weight-bold);
	text-align: left;
	color: var(--wim-ink);
	background: transparent;
	border: 0;
	cursor: pointer;
}

.wim-accordion__icon {
	flex-shrink: 0;
	width: 24px;
	height: 24px;
	position: relative;
	transition: transform var(--wim-dur-base) var(--wim-ease);
}
.wim-accordion__icon::before,
.wim-accordion__icon::after {
	content: "";
	position: absolute;
	top: 50%;
	left: 50%;
	background-color: var(--wim-gold);
	transform-origin: center;
}
.wim-accordion__icon::before {
	width: 16px;
	height: 2px;
	transform: translate(-50%, -50%);
}
.wim-accordion__icon::after {
	width: 2px;
	height: 16px;
	transform: translate(-50%, -50%);
	transition: transform var(--wim-dur-base) var(--wim-ease);
}
.wim-accordion__trigger[aria-expanded="true"] .wim-accordion__icon::after {
	transform: translate(-50%, -50%) scaleY(0);
}

.wim-accordion__panel {
	overflow: hidden;
	max-height: 0;
	transition: max-height var(--wim-dur-base) var(--wim-ease);
}
.wim-accordion__panel[data-open="true"] {
	max-height: 800px; /* 大き目の上限。JS で実体を計測する場合はそちらが優先 */
}
.wim-accordion__content {
	padding: 0 0 var(--wim-space-6);
	color: var(--wim-ink);
	line-height: var(--wim-lh-body);
}

/* ============================================================
 * Code block (tech feel)
 * ============================================================ */
.wim-codeblock {
	position: relative;
	font-family: var(--wim-font-mono);
	font-size: 14px;
	line-height: 1.7;
	background-color: var(--wim-bg-dark-tech);
	color: var(--wim-code-fg);
	border-radius: var(--wim-radius-md);
	padding: var(--wim-space-5) var(--wim-space-6);
	overflow-x: auto;
	border: 1px solid var(--wim-line-on-dark);
}
.wim-codeblock__title {
	display: block;
	font-family: var(--wim-font-sans);
	font-size: var(--wim-fs-meta);
	letter-spacing: var(--wim-ls-meta);
	text-transform: uppercase;
	color: var(--wim-accent-cyan);
	margin-bottom: var(--wim-space-3);
}

/* ============================================================
 * Fade-up (IntersectionObserver opt-in)
 * ============================================================ */
.wim-fade-up {
	opacity: 0;
	transform: translateY(12px);
	transition:
		opacity var(--wim-dur-slow) var(--wim-ease),
		transform var(--wim-dur-slow) var(--wim-ease);
	will-change: opacity, transform;
}
.wim-fade-up.is-visible {
	opacity: 1;
	transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
	.wim-fade-up {
		opacity: 1;
		transform: none;
		transition: none;
	}
}

/* ============================================================
 * Section heading helper (eyebrow + serif title + tick)
 * ============================================================ */
.wim-section-heading {
	display: flex;
	flex-direction: column;
	gap: var(--wim-space-3);
	margin-bottom: var(--wim-space-8);
}
.wim-section-heading__tick {
	display: inline-block;
	width: 48px;
	height: 1px;
	background-color: var(--wim-gold);
}
.wim-section-heading__eyebrow {
	font-family: var(--wim-font-sans);
	font-size: var(--wim-fs-meta);
	letter-spacing: var(--wim-ls-meta);
	text-transform: uppercase;
	color: var(--wim-muted);
}
.wim-section-heading__title {
	font-family: var(--wim-font-serif);
	font-size: var(--wim-fs-h2);
	font-weight: var(--wim-weight-bold);
	margin: 0;
	line-height: var(--wim-lh-display);
}
.wim-section--dark .wim-section-heading__eyebrow {
	color: var(--wim-accent-cyan);
}