/* ============================================
   NTUDENTSA — 浮動意見回饋按鈕 + Modal
   共用既有主題 token (--surface / --primary / --text 等)
   ============================================ */

#ntu-feedback-fab {
	position: fixed;
	right: 20px;
	bottom: 20px;
	z-index: 9998;
	display: inline-flex;
	align-items: center;
	gap: 8px;
	padding: 10px 16px;
	background: rgb(var(--c-accent));
	color: rgb(var(--c-accent-fg));
	border: none;
	cursor: pointer;
	font-family: var(--font-zh-sans);
	font-size: 14px;
	font-weight: 500;
	box-shadow: 0 6px 16px rgba(0,0,0,0.18);
	transition: transform 0.15s, box-shadow 0.15s, opacity 0.15s;
}
#ntu-feedback-fab:hover {
	transform: translateY(-2px);
	box-shadow: 0 10px 24px rgba(0,0,0,0.22);
}
#ntu-feedback-fab svg {
	width: 22px;
	height: 22px;
}
@media (max-width: 640px) {
	/* 手機只顯示圓形 icon、不顯字、避免擋內容 */
	#ntu-feedback-fab {
		padding: 12px;
		border-radius: 50%;
	}
	#ntu-feedback-fab .ntu-feedback-fab-label { display: none; }
}

#ntu-feedback-backdrop {
	position: fixed;
	inset: 0;
	background: rgba(0,0,0,0.55);
	z-index: 9999;
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 16px;
}
#ntu-feedback-backdrop[hidden] { display: none; }

#ntu-feedback-modal {
	background: rgb(var(--c-surface));
	color: rgb(var(--c-fg));
	width: 100%;
	max-width: 540px;
	max-height: calc(100dvh - 32px);
	overflow-y: auto;
	border: 1px solid rgb(var(--c-border));
	box-shadow: 0 20px 50px rgba(0,0,0,0.3);
	font-family: var(--font-zh-sans);
}
#ntu-feedback-modal header {
	display: flex;
	justify-content: space-between;
	align-items: center;
	padding: 16px 20px;
	border-bottom: 1px solid rgb(var(--c-border));
}
#ntu-feedback-modal h3 {
	margin: 0;
	font-family: var(--font-zh-serif);
	font-size: 20px;
	font-weight: 600;
	color: rgb(var(--c-fg));
}
#ntu-feedback-close {
	background: transparent;
	border: none;
	font-size: 28px;
	line-height: 1;
	color: rgb(var(--c-muted));
	cursor: pointer;
	padding: 4px 8px;
}
#ntu-feedback-close:hover { color: rgb(var(--c-accent)); }

#ntu-feedback-form {
	padding: 20px;
	display: flex;
	flex-direction: column;
	gap: 14px;
}
.ntu-feedback-lede {
	margin: 0;
	font-size: 13px;
	color: rgb(var(--c-muted));
	line-height: 1.6;
}
.ntu-feedback-row {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 12px;
}
@media (max-width: 480px) {
	.ntu-feedback-row { grid-template-columns: 1fr; }
}
#ntu-feedback-form label {
	display: flex;
	flex-direction: column;
	gap: 6px;
	font-size: 13px;
}
#ntu-feedback-form label > span {
	font-weight: 500;
	color: rgb(var(--c-muted));
	font-size: 12px;
	letter-spacing: 0.02em;
}
#ntu-feedback-form label em {
	color: rgb(var(--c-accent));
	font-style: normal;
	margin-left: 2px;
}
#ntu-feedback-form input,
#ntu-feedback-form select,
#ntu-feedback-form textarea {
	width: 100%;
	padding: 9px 12px;
	background: rgb(var(--c-bg));
	border: 1px solid rgb(var(--c-border));
	font-family: inherit;
	font-size: 14px;
	color: rgb(var(--c-fg));
	box-sizing: border-box;
}
#ntu-feedback-form input:focus,
#ntu-feedback-form select:focus,
#ntu-feedback-form textarea:focus {
	outline: none;
	border-color: rgb(var(--c-accent));
}
.ntu-feedback-actions {
	display: flex;
	align-items: center;
	gap: 16px;
	padding-top: 8px;
	border-top: 1px solid rgb(var(--c-border));
	margin-top: 4px;
}
.ntu-feedback-submit {
	padding: 10px 24px;
	background: rgb(var(--c-accent));
	color: rgb(var(--c-accent-fg));
	border: none;
	cursor: pointer;
	font-family: inherit;
	font-size: 14px;
	font-weight: 500;
}
.ntu-feedback-submit:hover {
	background: rgb(var(--c-accent-hover));
}
.ntu-feedback-submit:disabled {
	opacity: 0.5;
	cursor: wait;
}
.ntu-feedback-status {
	font-size: 13px;
	color: rgb(var(--c-muted));
}
.ntu-feedback-status.ntu-feedback-status--err {
	color: rgb(var(--c-danger));
}
.ntu-feedback-status.ntu-feedback-status--ok {
	color: rgb(var(--c-success));
}