/**
 * Uslik - 计算器页面。
 * 仅由 page-templates/page-calculator.php 加载。
 */

/* ------------------------------------------------------------------
   1. 页头
------------------------------------------------------------------ */
.calc-page {
	padding-bottom: clamp(32px, 5vw, 64px);
}

/* 条件字段与步骤区靠 hidden 属性切换；.calc-field 自己声明了 display:flex，
   必须显式提高优先级，否则隐藏不会生效。 */
.calc-page [hidden] {
	display: none !important;
}

.calc-hero {
	margin: 6px 0 clamp(18px, 2.4vw, 26px);
}

/* 标题与分类归属排在同一行，把原来的「胶囊 / 标题 / 描述」三行压成两行 */
.calc-hero__head {
	display: flex;
	align-items: center;
	flex-wrap: wrap;
	gap: 6px 12px;
}

.calc-hero__title {
	margin: 0;
	font-size: clamp(23px, 2.9vw, 32px);
	line-height: 1.2;
	letter-spacing: -0.025em;
}

/* 分类只是归属提示：改用描边胶囊，不再用实心块与标题抢注意力 */
.calc-hero__cat {
	display: inline-flex;
	align-items: center;
	gap: 5px;
	height: 22px;
	padding: 0 9px;
	border: 1px solid var(--border);
	border-radius: 999px;
	background: var(--surface);
	color: var(--muted);
	font-size: 11.5px;
	font-weight: 600;
	letter-spacing: 0.01em;
	line-height: 1;
	white-space: nowrap;
	text-decoration: none;
	transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.calc-hero__cat svg {
	flex: 0 0 auto;
}

.calc-hero__cat:hover {
	border-color: transparent;
	background: var(--brand-soft);
	color: var(--brand-ink);
}

.calc-hero__lede {
	max-width: 820px;
	margin: 8px 0 0;
	color: var(--muted);
	font-size: 14px;
	line-height: 1.7;
}

/* ------------------------------------------------------------------
   2. 工作区：输入 + 结果
------------------------------------------------------------------ */
.calc-workbench {
	display: grid;
	grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
	gap: clamp(16px, 2.2vw, 26px);
	align-items: start;
}

.calc-panel {
	background: var(--surface);
	border: 1px solid var(--border);
	border-radius: var(--radius-xl);
	box-shadow: var(--shadow-xs);
	padding: clamp(18px, 2.2vw, 26px);
}

.calc-panel__title {
	margin: 0 0 16px;
	font-size: 13px;
	font-weight: 600;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--muted);
}

/* 面板头部：标题在左，返回工具箱的入口靠右上角 */
.calc-panel__head {
	display: flex;
	align-items: center;
	justify-content: space-between;
	flex-wrap: wrap;
	gap: 10px;
	margin: 0 0 16px;
}

.calc-panel__head .calc-panel__title {
	margin: 0;
}

/* 头部里的按钮比 btn--sm 再小一档，不与标题抢高度 */
.calc-panel__head .btn {
	height: 30px;
	padding: 0 11px;
	font-size: 12px;
}

.calc-panel--result {
	position: sticky;
	top: calc(var(--header-h) + 16px);
	background: linear-gradient(165deg, var(--surface) 0%, var(--surface-2) 100%);
	box-shadow: var(--shadow-md);
}

/* 网格子项允许收缩，窄屏下输入框不会撑破面板。 */
.calc-panel--form {
	min-width: 0;
}

/* ------------------------------------------------------------------
   3. 表单
------------------------------------------------------------------ */
.calc-fields {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 14px 16px;
}

.calc-field {
	min-width: 0;
	display: flex;
	flex-direction: column;
	gap: 6px;
}

.calc-field--full,
.calc-field--list {
	grid-column: 1 / -1;
}

.calc-field__label {
	font-size: 13px;
	font-weight: 600;
	color: var(--text-2);
	line-height: 1.45;
}

.calc-field__control {
	position: relative;
	display: flex;
	align-items: center;
}

.calc-input {
	width: 100%;
	min-width: 0;
	height: 42px;
	padding: 0 12px;
	border: 1px solid var(--border-strong);
	border-radius: var(--radius-sm);
	background: var(--surface);
	color: var(--text);
	font-family: inherit;
	font-size: 15px;
	font-variant-numeric: tabular-nums;
	transition: border-color 0.16s var(--ease), box-shadow 0.16s var(--ease);
}

.calc-input:focus {
	outline: none;
	border-color: var(--brand);
	box-shadow: 0 0 0 3px var(--brand-soft);
}

/* 多行文本输入：JSON、Base64 等 */
.calc-input--textarea {
	height: auto;
	min-height: 132px;
	padding: 10px 12px;
	line-height: 1.6;
	resize: vertical;
}

.calc-input--mono {
	font-family: var(--font-mono);
	font-size: 13px;
	letter-spacing: -0.01em;
}

/* 文件拖拽区：文件只在浏览器本地处理，不会上传服务器 */
.calc-field--file {
	grid-column: 1 / -1;
}

.calc-drop {
	position: relative;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	gap: 5px;
	padding: 20px 16px;
	border: 1.5px dashed var(--border-strong);
	border-radius: var(--radius-sm);
	background: var(--surface);
	color: var(--muted-2);
	text-align: center;
	transition: border-color 0.16s var(--ease), background 0.16s var(--ease), color 0.16s var(--ease);
}

.calc-drop:hover,
.calc-drop.is-drag,
.calc-drop:focus-within {
	border-color: var(--brand);
	background: var(--brand-soft);
	color: var(--brand);
}

/* 透明的原生 input 铺满整个拖拽区，点击任意位置都能选文件 */
.calc-drop__input {
	position: absolute;
	inset: 0;
	width: 100%;
	height: 100%;
	opacity: 0;
	cursor: pointer;
}

.calc-drop__title {
	font-size: 13px;
	font-weight: 600;
	color: var(--text-2);
}

.calc-drop:hover .calc-drop__title,
.calc-drop.is-drag .calc-drop__title {
	color: var(--brand);
}

.calc-drop__meta {
	font-size: 11.5px;
	line-height: 1.5;
}

.calc-drop__list {
	display: flex;
	flex-wrap: wrap;
	gap: 6px;
	margin: 0;
	padding: 0;
	list-style: none;
}

.calc-drop__list[hidden] {
	display: none;
}

.calc-drop__item {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	max-width: 100%;
	padding: 4px 10px;
	border-radius: 999px;
	background: var(--surface-2);
	color: var(--muted);
	font-size: 11.5px;
	line-height: 1.4;
}

.calc-drop__name {
	max-width: 220px;
	overflow: hidden;
	text-overflow: ellipsis;
	white-space: nowrap;
	color: var(--text-2);
}

.calc-drop__size {
	font-variant-numeric: tabular-nums;
	white-space: nowrap;
}

.calc-field__unit {
	position: absolute;
	right: 12px;
	color: var(--muted-2);
	font-size: 12px;
	pointer-events: none;
}

.calc-field__control .calc-input:has(+ .calc-field__unit) {
	padding-right: 52px;
}

.calc-field--select .calc-field__unit {
	display: none;
}

.calc-field__hint {
	margin: 0;
	color: var(--muted-2);
	font-size: 12px;
	line-height: 1.55;
}

/* ------------------------------------------------------------------
   4. 动态行（课程列表等）
------------------------------------------------------------------ */
.calc-list {
	display: flex;
	flex-direction: column;
	gap: 8px;
}

.calc-list__head {
	display: flex;
	gap: 8px;
	padding: 0 2px;
	color: var(--muted-2);
	font-size: 11px;
	font-weight: 600;
	letter-spacing: 0.06em;
	text-transform: uppercase;
}

.calc-list__head span {
	flex: 1 1 0;
	min-width: 0;
}

.calc-list__head span:last-child {
	flex: 0 0 34px;
}

.calc-list__rows {
	display: flex;
	flex-direction: column;
	gap: 8px;
}

.calc-list__row {
	display: flex;
	align-items: center;
	gap: 8px;
}

.calc-list__row .calc-list__input {
	flex: 1 1 0;
	min-width: 0;
	height: 38px;
	font-size: 14px;
}

.calc-list__remove {
	flex: 0 0 34px;
	width: 34px;
	height: 34px;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	border: 1px solid var(--border);
	border-radius: var(--radius-xs);
	background: transparent;
	color: var(--muted-2);
	cursor: pointer;
	transition: color 0.16s var(--ease), border-color 0.16s var(--ease), background 0.16s var(--ease);
}

.calc-list__remove:hover {
	color: var(--danger);
	border-color: var(--danger);
	background: var(--danger-soft);
}

.calc-list__add {
	margin-top: 10px;
}

/* ------------------------------------------------------------------
   5. 结果面板
------------------------------------------------------------------ */
.calc-result__eyebrow {
	margin: 0 0 12px;
	font-size: 11px;
	font-weight: 700;
	letter-spacing: 0.1em;
	text-transform: uppercase;
	color: var(--brand-ink);
}

.calc-primary {
	display: flex;
	flex-direction: column;
	gap: 2px;
	padding-bottom: 16px;
	margin-bottom: 16px;
	border-bottom: 1px dashed var(--border-strong);
}

.calc-primary__label {
	color: var(--muted);
	font-size: 12px;
	font-weight: 600;
}

.calc-primary__value {
	display: flex;
	align-items: baseline;
	gap: 6px;
	min-width: 0;
}

.calc-primary__number {
	font-family: var(--font-mono);
	font-size: clamp(30px, 4.4vw, 42px);
	font-weight: 700;
	line-height: 1.1;
	letter-spacing: -0.03em;
	color: var(--text);
	font-variant-numeric: tabular-nums;
	word-break: break-word;
}

.calc-primary__unit {
	color: var(--muted);
	font-size: 14px;
	font-weight: 600;
}

/* 文本型主结果：YAML / Base64 这类长文本要回到阅读字号并保留换行 */
.calc-primary__value:has([data-format="text"]) {
	flex-direction: column;
	align-items: stretch;
	gap: 4px;
}

.calc-primary__number[data-format="text"] {
	display: block;
	max-width: 100%;
	font-size: 13.5px;
	font-weight: 600;
	line-height: 1.7;
	letter-spacing: 0;
	white-space: pre-wrap;
	overflow-wrap: anywhere;
}

.calc-breakdown__value [data-format="text"] {
	font-size: 12.5px;
	font-weight: 500;
	white-space: pre-wrap;
	overflow-wrap: anywhere;
}

/* 文件型结果：下载按钮与图片预览回到阅读字号 */
.calc-primary__value:has([data-format="download"]),
.calc-primary__value:has([data-format="image"]) {
	flex-direction: column;
	align-items: stretch;
	gap: 8px;
}

.calc-primary__number[data-format="download"],
.calc-primary__number[data-format="image"],
.calc-breakdown__value [data-format="download"],
.calc-breakdown__value [data-format="image"] {
	display: block;
	max-width: 100%;
	font-family: inherit;
	font-size: 13px;
	font-weight: 600;
	line-height: 1.5;
	letter-spacing: 0;
}

.calc-download {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	max-width: 100%;
	padding: 9px 14px;
	border-radius: var(--radius-sm);
	background: var(--brand);
	color: #fff;
	font-size: 13px;
	font-weight: 600;
	text-decoration: none;
	transition: background 0.16s var(--ease);
}

.calc-download:hover,
.calc-download:focus-visible {
	background: var(--brand-dark);
	color: #fff;
}

.calc-download svg {
	flex: none;
}

.calc-download__meta {
	display: block;
	margin-top: 2px;
	font-size: 11.5px;
	font-weight: 500;
	color: var(--muted-2);
	font-variant-numeric: tabular-nums;
}

.calc-preview {
	display: block;
	width: 100%;
	height: auto;
	max-height: 320px;
	object-fit: contain;
	border: 1px solid var(--border);
	border-radius: var(--radius-sm);
	background: #fff;
}

.calc-breakdown {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	flex-direction: column;
	gap: 9px;
}

.calc-breakdown__item {
	display: flex;
	align-items: baseline;
	justify-content: space-between;
	gap: 12px;
}

.calc-breakdown__label {
	color: var(--muted);
	font-size: 13px;
	line-height: 1.4;
}

.calc-breakdown__value {
	display: inline-flex;
	align-items: baseline;
	gap: 4px;
	color: var(--text);
	font-family: var(--font-mono);
	font-size: 14px;
	font-weight: 600;
	font-variant-numeric: tabular-nums;
	text-align: right;
	white-space: nowrap;
}

.calc-breakdown__unit {
	color: var(--muted-2);
	font-size: 11px;
}

.calc-breakdown__title {
	margin: 0 0 8px;
	color: var(--muted);
	font-size: 11px;
	font-weight: 700;
	letter-spacing: 0.08em;
	text-transform: uppercase;
}

.calc-result__error {
	margin: 14px 0 0;
	padding: 10px 12px;
	border-radius: var(--radius-sm);
	background: var(--danger-soft);
	color: var(--danger);
	font-size: 13px;
	line-height: 1.5;
}

.calc-result__foot {
	margin: 16px 0 0;
	padding-top: 12px;
	border-top: 1px solid var(--border);
	color: var(--muted-2);
	font-size: 12px;
	line-height: 1.5;
}

.calc-steps-wrap {
	margin-top: 16px;
	padding-top: 14px;
	border-top: 1px solid var(--border);
}

.calc-steps {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	flex-direction: column;
	gap: 6px;
	max-height: 260px;
	overflow: auto;
}

.calc-steps li {
	padding: 7px 10px;
	border-radius: var(--radius-xs);
	background: var(--surface-3);
	color: var(--text-2);
	font-family: var(--font-mono);
	font-size: 12px;
	line-height: 1.5;
}

/* ------------------------------------------------------------------
   6. 内容区
------------------------------------------------------------------ */
.calc-section {
	margin-top: clamp(28px, 4vw, 44px);
}

.calc-section__title {
	margin: 0 0 14px;
	font-size: clamp(18px, 2.2vw, 22px);
	letter-spacing: -0.01em;
}

/* 相关工具作为页尾收束，用分隔线跟正文拉开层次。 */
.calc-section--related {
	padding-top: clamp(20px, 2.6vw, 28px);
	border-top: 1px solid var(--border);
}

.calc-formula {
	margin: 0;
	padding: 18px 20px 18px 40px;
	background: var(--surface);
	border: 1px solid var(--border);
	border-radius: var(--radius-lg);
	color: var(--text-2);
	font-size: 13px;
	line-height: 1.7;
}

.calc-formula li + li {
	margin-top: 6px;
}

.calc-formula li::marker {
	color: var(--brand);
	font-weight: 700;
}

.calc-examples {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
	gap: 14px;
}

.calc-example {
	display: flex;
	flex-direction: column;
	gap: 10px;
	padding: 18px;
	background: var(--surface);
	border: 1px solid var(--border);
	border-radius: var(--radius-lg);
	box-shadow: var(--shadow-xs);
}

.calc-example__title {
	margin: 0;
	font-size: 15px;
	line-height: 1.4;
}

.calc-example__row {
	display: grid;
	gap: 3px;
	margin: 0;
	color: var(--text-2);
	font-size: 13px;
	line-height: 1.6;
}

.calc-example__label {
	color: var(--muted-2);
	font-size: 11px;
	font-weight: 700;
	letter-spacing: 0.06em;
	text-transform: uppercase;
}

.calc-example__row--result {
	padding: 10px 12px;
	border-radius: var(--radius-sm);
	background: var(--brand-soft);
	color: var(--text);
}

.calc-example__row--result .calc-example__label {
	color: var(--brand-ink);
}

.calc-faq {
	display: flex;
	flex-direction: column;
	gap: 8px;
}

.calc-faq__item {
	background: var(--surface);
	border: 1px solid var(--border);
	border-radius: var(--radius);
	overflow: hidden;
}

.calc-faq__question {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 14px;
	padding: 14px 18px;
	cursor: pointer;
	font-size: 14px;
	font-weight: 600;
	color: var(--text);
	list-style: none;
}

.calc-faq__question::-webkit-details-marker {
	display: none;
}

.calc-faq__question::after {
	content: "+";
	flex: 0 0 auto;
	color: var(--muted-2);
	font-size: 18px;
	font-weight: 400;
	line-height: 1;
}

.calc-faq__item[open] .calc-faq__question::after {
	content: "−";
}

.calc-faq__item[open] .calc-faq__question {
	color: var(--brand-ink);
}

.calc-faq__answer {
	margin: 0;
	padding: 0 18px 16px;
	color: var(--muted);
	font-size: 13.5px;
	line-height: 1.7;
}

/* ------------------------------------------------------------------
   7. 相关工具与免责声明
------------------------------------------------------------------ */
.calc-related-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
	gap: 12px;
}

.calc-related-card {
	display: flex;
	flex-direction: column;
	gap: 6px;
	padding: 16px 18px;
	background: var(--surface);
	border: 1px solid var(--border);
	border-radius: var(--radius);
	text-decoration: none;
	color: inherit;
	box-shadow: var(--shadow-xs);
	transition: border-color 0.16s var(--ease), transform 0.16s var(--ease), box-shadow 0.16s var(--ease);
}

.calc-related-card:hover {
	border-color: var(--brand);
	transform: translateY(-2px);
	box-shadow: var(--shadow-sm);
	color: inherit;
}

.calc-related-card__name {
	font-size: 14px;
	font-weight: 600;
	color: var(--text);
	line-height: 1.4;
}

.calc-related-card__desc {
	color: var(--muted);
	font-size: 12.5px;
	line-height: 1.55;
}

.calc-siblings {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 6px 10px;
	margin: 14px 0 0;
	font-size: 13px;
}

.calc-siblings__label {
	color: var(--muted-2);
}

.calc-siblings__link {
	color: var(--brand-ink);
	text-decoration: none;
}

.calc-siblings__link:hover {
	text-decoration: underline;
}

.calc-back {
	margin: 0;
}

.calc-disclaimer {
	margin: clamp(28px, 4vw, 44px) 0 0;
	padding: 14px 16px;
	border-radius: var(--radius);
	background: var(--surface-2);
	border: 1px solid var(--border);
	color: var(--muted);
	font-size: 12px;
	line-height: 1.65;
}

.calc-disclaimer strong {
	color: var(--text-2);
}

/* ------------------------------------------------------------------
   8. 响应式
------------------------------------------------------------------ */
@media (max-width: 960px) {
	.calc-workbench {
		grid-template-columns: minmax(0, 1fr);
	}

	.calc-panel--result {
		position: static;
	}
}

@media (max-width: 620px) {
	/* 窄屏一行放不下：回到「分类在上、标题在下」，间距比原来收紧一半 */
	.calc-hero__head {
		flex-direction: column;
		align-items: flex-start;
		gap: 7px;
	}

	.calc-hero__cat {
		order: -1;
	}

	.calc-panel__head {
		gap: 8px;
	}

	.calc-panel__head .btn {
		height: 28px;
		padding: 0 9px;
		font-size: 11.5px;
	}

	.calc-fields {
		grid-template-columns: minmax(0, 1fr);
	}

	.calc-primary__number {
		font-size: 32px;
	}

	.calc-list__head span:first-child {
		flex: 1.4 1 0;
	}

	.calc-list__row .calc-list__input[data-list-input="grade"] {
		flex: 1.4 1 0;
	}
}