/*
 * diagram.css — keylockr.app 圖解外觀
 *
 * 選擇器一律以 .kld-svg / .kld-box 開頭，特異度高於 SVG 檔內建的裸 class 樣式，
 * 所以「直接開啟 .svg」看得懂，放進頁面時又能被這裡完全接管。
 *
 * 變暗只換顏色，不動 opacity：透明度一降，暗掉的線和亮線疊在一起會糊成一片。
 */

.kld-box {
	position: relative;
	margin: 1.5rem 0;
	padding: 0.5rem;
	border: 1px solid #dde3ea;
	border-radius: 14px;
	background: #fbfcfd;
	transition: border-color .15s ease, box-shadow .15s ease;
}

.kld-box.kld-active {
	border-color: #3f8ee0;
	box-shadow: 0 0 0 3px rgba(63, 142, 224, .18);
}

.kld-vp {
	overflow: hidden;
	border-radius: 10px;
	/* 單指是頁面捲動，雙指才是這張圖的事——不搶捲動是硬性不變量 */
	touch-action: pan-y;
	cursor: grab;
}

.kld-vp.kld-dragging {
	cursor: grabbing;
}

.kld-stage {
	transform-origin: 0 0;
	will-change: transform;
}

.kld-svg {
	display: block;
	width: 100%;
	height: auto;
	--kld-dim: #c2cad6;
	--kld-dim-soft: #d6dce4;
}

/* ---- 佔位骨架（延後載入時的第一屏內容，避免版面跳動） */
.kld-ph {
	display: flex;
	flex-direction: column;
	justify-content: center;
	gap: .5rem;
	aspect-ratio: 21 / 9;
	padding: 1.25rem;
	border-radius: 10px;
	background: linear-gradient(180deg, #f2f5f8, #e9eef4);
	color: #4d5866;
	cursor: pointer;
}

.kld-ph strong {
	font-size: 1.05rem;
	color: #1b2330;
}

/* 資源載入失敗時由 footer.html 的 bootstrap 補上，點占位卡即可重試 */
.kld-ph-retry {
	font-weight: 600;
	color: #b4472e;
}

/* ---- 工具列與提示 */
.kld-bar {
	position: absolute;
	top: 1rem;
	right: 1rem;
	display: flex;
	gap: .35rem;
}

.kld-btn {
	width: 34px;
	height: 34px;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	font-size: 1rem;
	line-height: 1;
	color: #4d5866;
	background: rgba(255, 255, 255, .92);
	border: 1px solid #d3dae3;
	border-radius: 9px;
	cursor: pointer;
}

.kld-btn:hover {
	color: #1b2330;
	border-color: #8d95a6;
}

.kld-btn.kld-btn-on {
	color: #fff;
	background: #3f8ee0;
	border-color: #3f8ee0;
}

.kld-hint {
	position: absolute;
	right: 1rem;
	bottom: .9rem;
	padding: .2rem .55rem;
	font-size: .76rem;
	color: #6b7583;
	background: rgba(255, 255, 255, .88);
	border: 1px solid #e2e7ee;
	border-radius: 7px;
	pointer-events: none;
}

/* ---- 命中區與鍵盤焦點 */
.kld-svg [data-tip] {
	cursor: pointer;
}

.kld-svg [data-tip]:focus-visible {
	outline: 3px solid #3f8ee0;
	outline-offset: 3px;
	border-radius: 4px;
}

/* ---- 聚焦變暗：只換顏色 */
.kld-svg.kld-dim .kld-node:not(.kld-focus) .kld-card {
	stroke: var(--kld-dim);
}

.kld-svg.kld-dim .kld-node:not(.kld-focus) .kld-title,
.kld-svg.kld-dim .kld-node:not(.kld-focus) .kld-sub,
.kld-svg.kld-dim .kld-node:not(.kld-focus) .kld-capt,
.kld-svg.kld-dim .kld-node:not(.kld-focus) .kld-soft {
	fill: var(--kld-dim);
}

.kld-svg.kld-dim .kld-node:not(.kld-focus) .kld-cap {
	fill: var(--kld-dim-soft);
	stroke: var(--kld-dim);
}

.kld-svg.kld-dim .kld-arrow:not(.kld-focus):not(.kld-focus-rel) .kld-line {
	stroke: var(--kld-dim-soft);
	/* 箭頭符號是 <marker>，顏色改不動——暗線索性收起箭頭，免得只剩一顆亮三角 */
	marker-end: none;
	marker-start: none;
}

.kld-svg.kld-dim .kld-arrow:not(.kld-focus):not(.kld-focus-rel) .kld-lbl {
	fill: var(--kld-dim);
}

.kld-svg.kld-dim .kld-zone-box {
	stroke: var(--kld-dim-soft);
}

.kld-svg.kld-dim .kld-zone-label {
	fill: var(--kld-dim);
}

.kld-svg .kld-focus .kld-card,
.kld-svg .kld-focus .kld-line {
	stroke-width: 3;
}

.kld-svg .kld-raised .kld-line {
	stroke-width: 3.6;
}

/* ---- 流動動畫（≋ 開關，預設關閉） */
@keyframes kld-ants {
	to { stroke-dashoffset: -28; }
}

.kld-svg.kld-ants .kld-flow-target {
	stroke-dasharray: 10 4;
	animation: kld-ants 1s linear infinite;
}

@media (prefers-reduced-motion: reduce) {
	.kld-svg.kld-ants .kld-flow-target {
		animation: none;
	}
}

/* ---- tooltip */
.kld-tip {
	position: fixed;
	z-index: 1080;
	max-width: 400px;
	max-height: 74vh;
	overflow-y: auto;
	padding: .95rem 1.05rem;
	font-size: .9rem;
	line-height: 1.55;
	color: #2b3440;
	background: #fff;
	border: 1px solid #d9e0e8;
	border-radius: 12px;
	box-shadow: 0 12px 34px rgba(16, 24, 40, .18);
}

.kld-tip[hidden] {
	display: none;
}

.kld-tip.kld-tip-pinned {
	border-color: #3f8ee0;
}

.kld-tip h5 {
	margin: 0 0 .5rem;
	font-size: 1rem;
	font-weight: 600;
	color: #1b2330;
}

.kld-tip h6 {
	margin: .85rem 0 .25rem;
	font-size: .74rem;
	font-weight: 700;
	letter-spacing: .04em;
	text-transform: uppercase;
	color: #7a8494;
}

.kld-tip h6:first-of-type {
	margin-top: .35rem;
}

.kld-tip p {
	margin: 0 0 .35rem;
}

/* ---- 深色模式 */
@media (prefers-color-scheme: dark) {
	.kld-box {
		border-color: #2b323c;
		background: #0e1216;
	}

	.kld-svg {
		--kld-dim: #4b5563;
		--kld-dim-soft: #39414c;
	}

	.kld-ph {
		background: linear-gradient(180deg, #161b22, #12171d);
		color: #a4aebd;
	}

	.kld-ph strong {
		color: #e8edf4;
	}

	.kld-ph-retry {
		color: #e08a72;
	}

	.kld-btn {
		color: #a4aebd;
		background: rgba(22, 27, 34, .92);
		border-color: #2b323c;
	}

	.kld-btn:hover {
		color: #e8edf4;
		border-color: #4b5563;
	}

	.kld-hint {
		color: #8d95a6;
		background: rgba(22, 27, 34, .88);
		border-color: #2b323c;
	}

	.kld-tip {
		color: #cbd3de;
		background: #161b22;
		border-color: #2b323c;
		box-shadow: 0 12px 34px rgba(0, 0, 0, .5);
	}

	.kld-tip h5 {
		color: #e8edf4;
	}

	.kld-tip h6 {
		color: #8d95a6;
	}
}