/* ═══════════════════════════════════════════════════════════════════════════
 * AI Solutions — Stylesheet
 * Matheezee Exam System v2.1
 *
 * Naming: .mzai-*  (keeps the AI feature isolated from existing .mz-* rules)
 * ═══════════════════════════════════════════════════════════════════════════ */

/* ── Button ─────────────────────────────────────────────────────────────── */

.mzai-btn {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	padding: 8px 16px;
	border: 1px solid #c7d2fe;
	border-radius: 10px;
	background: linear-gradient(135deg, #eef2ff, #e0e7ff);
	color: #4338ca;
	font-size: 13px;
	font-weight: 600;
	cursor: pointer;
	transition: all 0.2s ease;
	font-family: inherit;
	line-height: 1.4;
	margin-top: 10px;
}

.mzai-btn:hover {
	background: linear-gradient(135deg, #e0e7ff, #c7d2fe);
	box-shadow: 0 4px 12px rgba(67, 56, 202, 0.15);
	transform: translateY(-1px);
}

.mzai-btn:active {
	transform: translateY(0);
}

.mzai-btn--loading {
	pointer-events: none;
	opacity: 0.8;
}

.mzai-btn__icon {
	font-size: 16px;
	line-height: 1;
}

.mzai-btn__spinner {
	display: inline-block;
	width: 14px;
	height: 14px;
	border: 2px solid rgba(67, 56, 202, 0.2);
	border-top-color: #4338ca;
	border-radius: 50%;
	animation: mzai-spin 0.7s linear infinite;
}

@keyframes mzai-spin {
	to { transform: rotate(360deg); }
}

/* ── Solution container ─────────────────────────────────────────────────── */

.mzai-solution {
	margin-top: 14px;
	border-radius: 16px;
	overflow: hidden;
	border: 1px solid #e2e8f0;
	background: #ffffff;
	box-shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
	animation: mzai-fadeIn 0.3s ease;
}

@keyframes mzai-fadeIn {
	from { opacity: 0; transform: translateY(8px); }
	to   { opacity: 1; transform: translateY(0); }
}

.mzai-solution__header {
	display: flex;
	justify-content: space-between;
	align-items: center;
	padding: 14px 20px;
	background: linear-gradient(135deg, #312e81, #4338ca);
	color: #ffffff;
	cursor: pointer;
	user-select: none;
}

.mzai-solution__header:hover {
	background: linear-gradient(135deg, #3b3896, #4f46e5);
}

.mzai-solution__title {
	font-size: 15px;
	font-weight: 700;
	display: flex;
	align-items: center;
	gap: 8px;
}

.mzai-solution__toggle {
	font-size: 18px;
	transition: transform 0.3s ease;
}

.mzai-solution--collapsed .mzai-solution__toggle {
	transform: rotate(-90deg);
}

.mzai-solution--collapsed .mzai-solution__body {
	display: none;
}

.mzai-solution__body {
	padding: 20px;
}

/* ── Cards (generic) ────────────────────────────────────────────────────── */

.mzai-card {
	border-radius: 12px;
	padding: 16px 18px;
	margin-bottom: 14px;
	line-height: 1.7;
	font-size: 14px;
	color: #1e293b;
}

.mzai-card__title {
	font-size: 15px;
	font-weight: 700;
	margin: 0 0 8px;
	display: flex;
	align-items: center;
	gap: 6px;
}

.mzai-card p {
	margin: 4px 0;
}

.mzai-card ul,
.mzai-card ol {
	margin: 6px 0;
	padding-left: 20px;
}

.mzai-card li {
	margin-bottom: 4px;
}

/* ── Card variants ──────────────────────────────────────────────────────── */

.mzai-card--chapter {
	background: #f8fafc;
	border: 1px solid #e2e8f0;
}

.mzai-card--chapter .mzai-card__title {
	color: #334155;
}

.mzai-card--concept {
	background: #f0fdf4;
	border: 1px solid #bbf7d0;
}

.mzai-card--concept .mzai-card__title {
	color: #166534;
}

.mzai-card--formula {
	background: #eff6ff;
	border: 1px solid #bfdbfe;
}

.mzai-card--formula .mzai-card__title {
	color: #1e40af;
}

.mzai-card--answer {
	background: linear-gradient(135deg, #ecfdf5, #d1fae5);
	border: 2px solid #34d399;
}

.mzai-card--answer .mzai-card__title {
	color: #065f46;
	font-size: 16px;
}

.mzai-answer-value {
	font-size: 20px;
	font-weight: 800;
	color: #065f46;
	text-align: center;
	padding: 8px 0;
}

.mzai-card--tip {
	background: #faf5ff;
	border: 1px solid #e9d5ff;
}

.mzai-card--tip .mzai-card__title {
	color: #6b21a8;
}

.mzai-card--mistake {
	background: #fef2f2;
	border: 1px solid #fecaca;
}

.mzai-card--mistake .mzai-card__title {
	color: #991b1b;
}

.mzai-card--related {
	background: #f8fafc;
	border: 1px solid #e2e8f0;
}

.mzai-card--related .mzai-card__title {
	color: #475569;
}

/* ── Steps ──────────────────────────────────────────────────────────────── */

.mzai-steps {
	margin-bottom: 14px;
}

.mzai-steps > .mzai-card__title,
.mzai-steps > h3 {
	font-size: 15px;
	font-weight: 700;
	margin: 0 0 12px;
	color: #0f172a;
}

.mzai-step {
	display: flex;
	gap: 14px;
	margin-bottom: 12px;
	padding: 14px 16px;
	background: #fffbeb;
	border: 1px solid #fde68a;
	border-radius: 12px;
}

.mzai-step__number {
	flex-shrink: 0;
	width: 60px;
	height: 28px;
	display: flex;
	align-items: center;
	justify-content: center;
	background: linear-gradient(135deg, #f59e0b, #d97706);
	color: #fff;
	font-size: 11px;
	font-weight: 700;
	border-radius: 8px;
	text-transform: uppercase;
	letter-spacing: 0.02em;
}

.mzai-step__content {
	flex: 1;
	min-width: 0;
	line-height: 1.8;
	font-size: 14px;
	color: #1e293b;
}

.mzai-step__content p {
	margin: 4px 0;
}

/* ── MathJax overrides ──────────────────────────────────────────────────── */

.mzai-solution .MathJax {
	font-size: 105% !important;
}

.mzai-solution .MathJax_Display {
	margin: 10px 0 !important;
	overflow-x: auto;
}

/* ── Loading state ──────────────────────────────────────────────────────── */

.mzai-loading {
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: 12px;
	padding: 40px 20px;
	text-align: center;
}

.mzai-loading__spinner {
	width: 36px;
	height: 36px;
	border: 3px solid #e0e7ff;
	border-top-color: #4338ca;
	border-radius: 50%;
	animation: mzai-spin 0.8s linear infinite;
}

.mzai-loading__text {
	color: #64748b;
	font-size: 14px;
	font-weight: 500;
}

/* ── Error state ────────────────────────────────────────────────────────── */

.mzai-error {
	padding: 14px 18px;
	background: #fef2f2;
	border: 1px solid #fecaca;
	border-radius: 10px;
	color: #991b1b;
	font-size: 13px;
	margin-top: 10px;
}

/* ── Admin regenerate ───────────────────────────────────────────────────── */

.mzai-regen {
	display: inline-flex;
	align-items: center;
	gap: 4px;
	padding: 4px 10px;
	border: 1px solid #c7d2fe;
	border-radius: 6px;
	background: #eef2ff;
	color: #4338ca;
	font-size: 11px;
	font-weight: 600;
	cursor: pointer;
	transition: all 0.2s;
}

.mzai-regen:hover {
	background: #c7d2fe;
}

/* ── Responsive ─────────────────────────────────────────────────────────── */

@media (max-width: 640px) {
	.mzai-solution__body {
		padding: 14px;
	}

	.mzai-card {
		padding: 12px 14px;
	}

	.mzai-step {
		flex-direction: column;
		gap: 8px;
	}

	.mzai-step__number {
		width: auto;
		align-self: flex-start;
	}

	.mzai-answer-value {
		font-size: 17px;
	}
}