/* ==========================================================================
   Amount Upper —— 前端样式
   ========================================================================== */

.au-box {
	--au-accent: #c8102e;
	--au-accent-soft: #fff1f2;
	--au-bg: #ffffff;
	--au-surface: linear-gradient(180deg, #fbfbfd 0%, #f5f6f9 100%);
	--au-border: #ececf1;
	--au-text: #16181d;
	--au-muted: #8a8f98;
	--au-input-bg: #ffffff;
	--au-shadow: 0 8px 28px -12px rgba(16, 24, 40, .18), 0 2px 6px -2px rgba(16, 24, 40, .06);

	position: relative;
	box-sizing: border-box;
	display: block;
	max-width: 560px;
	margin: 1.4em auto;
	padding: 20px;
	background: var(--au-bg);
	border: 1px solid var(--au-border);
	border-radius: 16px;
	box-shadow: var(--au-shadow);
	color: var(--au-text);
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
		"Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
	font-size: 14px;
	line-height: 1.6;
	text-align: left;
	-webkit-font-smoothing: antialiased;
}

.au-box *,
.au-box *::before,
.au-box *::after {
	box-sizing: border-box;
}

/* ---------- 顶部 ---------- */

.au-box__top {
	display: flex;
	align-items: center;
	justify-content: space-between;
	flex-wrap: wrap;
	gap: 10px;
	margin-bottom: 14px;
}

.au-box__tag {
	display: inline-flex;
	align-items: center;
	gap: 7px;
	padding: 4px 12px;
	font-size: 12px;
	font-weight: 600;
	line-height: 1.5;
	letter-spacing: .05em;
	color: var(--au-accent);
	background: var(--au-accent-soft);
	border-radius: 999px;
}

.au-box__tag::before {
	content: "";
	width: 6px;
	height: 6px;
	border-radius: 50%;
	background: currentColor;
}

.au-box__amount {
	font-size: 15px;
	font-weight: 700;
	letter-spacing: .02em;
	color: var(--au-muted);
	font-variant-numeric: tabular-nums;
}

/* ---------- 结果区 ---------- */

.au-box__main {
	padding: 16px 18px;
	background: var(--au-surface);
	border: 1px solid var(--au-border);
	border-radius: 12px;
}

.au-box__prefix {
	display: block;
	margin-bottom: 5px;
	font-size: 12px;
	font-weight: 500;
	letter-spacing: .1em;
	color: var(--au-muted);
}

.au-box__text {
	display: block;
	font-size: 1.2rem;
	font-weight: 700;
	line-height: 1.55;
	letter-spacing: .08em;
	color: var(--au-text);
	word-break: break-all;
}

.au-box__text.is-empty {
	color: var(--au-muted);
	font-weight: 500;
	letter-spacing: .05em;
}

/* ---------- 输入框 ---------- */

.au-field {
	display: flex;
	align-items: center;
	margin-bottom: 14px;
	background: var(--au-input-bg);
	border: 1.5px solid var(--au-border);
	border-radius: 12px;
	transition: border-color .18s ease, box-shadow .18s ease;
}

.au-field:focus-within {
	border-color: var(--au-accent);
	box-shadow: 0 0 0 4px var(--au-accent-soft);
}

.au-field__symbol {
	padding-left: 15px;
	font-size: 17px;
	font-weight: 700;
	line-height: 1;
	color: var(--au-muted);
	user-select: none;
}

.au-field__input {
	flex: 1 1 auto;
	min-width: 0;
	width: 100%;
	margin: 0 !important;
	padding: 13px 15px 13px 9px;
	border: 0 !important;
	border-radius: 0 !important;
	background: transparent !important;
	box-shadow: none !important;
	outline: none !important;
	font-family: inherit;
	font-size: 16px;
	font-weight: 600;
	line-height: 1.4;
	color: var(--au-text);
	font-variant-numeric: tabular-nums;
	-webkit-appearance: none;
	appearance: none;
}

.au-field__input::placeholder {
	color: var(--au-muted);
	opacity: .7;
	font-weight: 400;
}

/* ---------- 复制按钮 ---------- */

.au-copy {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	margin-top: 14px;
	padding: 8px 14px;
	font-family: inherit;
	font-size: 13px;
	font-weight: 600;
	line-height: 1.4;
	color: var(--au-muted);
	background: var(--au-input-bg);
	border: 1px solid var(--au-border);
	border-radius: 9px;
	cursor: pointer;
	transition: color .16s ease, border-color .16s ease, background-color .16s ease, transform .1s ease;
}

.au-copy:hover {
	color: var(--au-accent);
	border-color: var(--au-accent);
	background: var(--au-accent-soft);
}

.au-copy:active {
	transform: translateY(1px);
}

.au-copy.is-done {
	color: #0f7b4f;
	border-color: rgba(15, 123, 79, .35);
	background: rgba(16, 185, 129, .1);
}

.au-copy__icon {
	display: block;
	flex: 0 0 auto;
}

/* ---------- 错误提示 ---------- */

.au-invalid {
	display: inline-block;
	padding: 2px 10px;
	font-size: 13px;
	color: #b42318;
	background: #fef3f2;
	border-radius: 6px;
}

/* ---------- 暗色主题 ---------- */

.au-box.au-theme-dark {
	--au-accent: #ff5f78;
	--au-accent-soft: rgba(255, 95, 120, .14);
	--au-bg: #14161a;
	--au-surface: linear-gradient(180deg, #1d2027 0%, #191c22 100%);
	--au-border: #2b2f37;
	--au-text: #f3f5f8;
	--au-muted: #98a0ac;
	--au-input-bg: #1b1e24;
	--au-shadow: 0 10px 30px -14px rgba(0, 0, 0, .8);
}

@media (prefers-color-scheme: dark) {
	.au-box.au-theme-auto {
		--au-accent: #ff5f78;
		--au-accent-soft: rgba(255, 95, 120, .14);
		--au-bg: #14161a;
		--au-surface: linear-gradient(180deg, #1d2027 0%, #191c22 100%);
		--au-border: #2b2f37;
		--au-text: #f3f5f8;
		--au-muted: #98a0ac;
		--au-input-bg: #1b1e24;
		--au-shadow: 0 10px 30px -14px rgba(0, 0, 0, .8);
	}
}

/* ---------- 响应式 ---------- */

@media (max-width: 480px) {
	.au-box {
		padding: 16px;
		border-radius: 14px;
	}

	.au-box__main {
		padding: 14px;
	}

	.au-box__text {
		font-size: 1.05rem;
		letter-spacing: .05em;
	}
}