/* ARM Frontend — สโคปทุกอย่างไว้ใต้ .arm-frontend เพื่อไม่ให้ชนกับสไตล์ของ Astra/Elementor */
.arm-frontend {
	--arm-purple-900: #3c1361;
	--arm-purple-700: #5a2a86;
	--arm-purple-500: #7c4aa8;
	--arm-purple-050: #f6f1fb;
	--arm-gold: #c99a2e;
	--arm-gold-light: #f4e4b8;
	--arm-border: #e3d8ef;
	--arm-text: #2a2438;
	--arm-text-soft: #6b6478;

	font-family: 'IBM Plex Sans Thai', 'Noto Sans Thai', -apple-system, sans-serif;
	color: var(--arm-text);
	max-width: 960px;
	margin: 0 auto;
	box-sizing: border-box;
}
.arm-frontend *, .arm-frontend *::before, .arm-frontend *::after {
	box-sizing: border-box;
}

/* ----- แถบตัวกรอง ----- */
.arm-frontend .arm-filters {
	display: flex;
	flex-wrap: wrap;
	gap: 14px;
	background: var(--arm-purple-050);
	border: 1px solid var(--arm-border);
	border-radius: 14px;
	padding: 18px 20px;
	margin-bottom: 24px;
}
.arm-frontend .arm-filter-group {
	display: flex;
	flex-direction: column;
	gap: 4px;
	min-width: 160px;
	flex: 1 1 160px;
}
.arm-frontend .arm-filter-group label {
	font-size: 12.5px;
	font-weight: 600;
	color: var(--arm-purple-700);
	letter-spacing: .01em;
}
.arm-frontend .arm-filter-group select {
	padding: 9px 12px;
	border-radius: 9px;
	border: 1px solid var(--arm-border);
	background: #fff;
	color: var(--arm-text);
	font-family: inherit;
	font-size: 14.5px;
}
.arm-frontend .arm-filter-group select:focus {
	outline: 2px solid var(--arm-purple-500);
	outline-offset: 1px;
}

.arm-frontend .arm-empty-state {
	text-align: center;
	padding: 40px 20px;
	color: var(--arm-text-soft);
	border: 1px dashed var(--arm-border);
	border-radius: 12px;
}

/* ----- ระดับคณะ ----- */
.arm-frontend .arm-faculty-item {
	border: 1px solid var(--arm-border);
	border-radius: 14px;
	margin-bottom: 12px;
	overflow: hidden;
	background: #fff;
}
.arm-frontend .arm-faculty-header {
	width: 100%;
	display: flex;
	align-items: center;
	gap: 12px;
	background: linear-gradient(135deg, var(--arm-purple-900), var(--arm-purple-700));
	color: #fff;
	border: none;
	padding: 16px 20px;
	font-size: 16.5px;
	font-family: 'Noto Serif Thai', serif;
	font-weight: 600;
	cursor: pointer;
	text-align: left;
}
.arm-frontend .arm-faculty-name {
	flex: 1;
}
.arm-frontend .arm-faculty-count {
	font-size: 12.5px;
	font-family: 'IBM Plex Sans Thai', sans-serif;
	font-weight: 400;
	background: rgba(255,255,255,0.16);
	padding: 3px 10px;
	border-radius: 999px;
	white-space: nowrap;
}
.arm-frontend .arm-faculty-header .arm-caret {
	transition: transform .2s ease;
	font-size: 13px;
	color: var(--arm-gold-light);
}
.arm-frontend .arm-faculty-header.is-open .arm-caret {
	transform: rotate(180deg);
}

/* ----- ระดับสาขาวิชา ----- */
.arm-frontend .arm-major-list {
	padding: 10px;
	background: var(--arm-purple-050);
}
.arm-frontend .arm-major-item {
	background: #fff;
	border: 1px solid var(--arm-border);
	border-radius: 10px;
	margin-bottom: 8px;
	overflow: hidden;
}
.arm-frontend .arm-major-item:last-child {
	margin-bottom: 0;
}
.arm-frontend .arm-major-header {
	width: 100%;
	display: flex;
	align-items: center;
	gap: 10px;
	background: #fff;
	border: none;
	border-left: 4px solid var(--arm-gold);
	padding: 13px 16px;
	font-size: 15px;
	font-weight: 500;
	color: var(--arm-purple-900);
	cursor: pointer;
	text-align: left;
}
.arm-frontend .arm-major-header:hover {
	background: #fbf8f1;
}
.arm-frontend .arm-major-name {
	flex: 1;
}
.arm-frontend .arm-major-header .arm-caret {
	color: var(--arm-gold);
	font-size: 15px;
	transition: transform .2s ease;
}
.arm-frontend .arm-major-header.is-open .arm-caret {
	transform: rotate(45deg);
}
.arm-frontend .arm-major-header.is-open {
	background: var(--arm-gold-light);
}

/* ----- รายละเอียดสาขาวิชา (แสดงได้ทีละ 1 สาขาเท่านั้น) ----- */
.arm-frontend .arm-major-detail {
	border-top: 1px solid var(--arm-border);
	padding: 16px 18px 18px;
	background: #fffdf8;
}
.arm-frontend .arm-detail-meta {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
	margin-bottom: 14px;
}
.arm-frontend .arm-chip {
	font-size: 12px;
	background: var(--arm-purple-050);
	color: var(--arm-purple-700);
	border: 1px solid var(--arm-border);
	padding: 4px 10px;
	border-radius: 999px;
	font-weight: 600;
}
.arm-frontend .arm-chip-round {
	background: var(--arm-gold-light);
	color: #6b5310;
	border-color: var(--arm-gold);
}
.arm-frontend .arm-detail-row {
	display: grid;
	grid-template-columns: 170px 1fr;
	gap: 10px;
	padding: 9px 0;
	border-bottom: 1px dashed var(--arm-border);
	font-size: 14.5px;
	line-height: 1.65;
}
.arm-frontend .arm-detail-row:last-child {
	border-bottom: none;
}
.arm-frontend .arm-detail-label {
	font-weight: 600;
	color: var(--arm-purple-700);
}
.arm-frontend .arm-detail-value {
	color: var(--arm-text);
	word-break: break-word;
}
.arm-frontend .arm-map-link {
	display: inline-block;
	margin-top: 4px;
	color: var(--arm-purple-700);
	font-weight: 600;
	text-decoration: none;
	border-bottom: 1px dotted var(--arm-purple-500);
}
.arm-frontend .arm-map-link:hover {
	color: var(--arm-purple-900);
}

/* ----- แท็บสลับตัวเลือกย่อยภายในสาขาเดียวกัน (เช่น ภาคปกติ / เทียบโอน ภาคสมทบ) ----- */
.arm-frontend .arm-variant-tabs {
	display: flex;
	flex-wrap: wrap;
	gap: 6px;
	margin-bottom: 14px;
	padding-bottom: 12px;
	border-bottom: 1px solid var(--arm-border);
}
.arm-frontend .arm-variant-tab {
	font-family: inherit;
	font-size: 13px;
	font-weight: 600;
	padding: 7px 14px;
	border-radius: 999px;
	border: 1px solid var(--arm-border);
	background: #fff;
	color: var(--arm-purple-700);
	cursor: pointer;
}
.arm-frontend .arm-variant-tab:hover {
	background: var(--arm-purple-050);
}
.arm-frontend .arm-variant-tab.is-active {
	background: var(--arm-purple-900);
	border-color: var(--arm-purple-900);
	color: #fff;
}

@media (max-width: 600px) {
	.arm-frontend .arm-detail-row {
		grid-template-columns: 1fr;
		gap: 3px;
	}
	.arm-frontend .arm-faculty-header {
		padding: 13px 15px;
		font-size: 15px;
	}
}