/* NUST Aggregate Calculator - Styles */

.nac-wrapper {
	--nac-teal: #14b8a6;
	--nac-teal-dark: #0d9488;
	--nac-teal-light: #e6fbf8;
	--nac-text-dark: #1e293b;
	--nac-text-gray: #64748b;
	--nac-border: #e2e8f0;
	--nac-bg-panel: #f1f5f9;
	--nac-red: #dc2626;

	max-width: 640px;
	margin: 0 auto;
	padding: 24px 16px 48px;
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
	box-sizing: border-box;
}

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

.nac-header {
	text-align: center;
	margin-bottom: 24px;
}

.nac-title {
	font-size: 28px;
	font-weight: 700;
	color: var(--nac-text-dark);
	margin: 0 0 10px;
}

.nac-subtitle {
	font-size: 15px;
	color: var(--nac-text-gray);
	line-height: 1.5;
	margin: 0;
}

.nac-card {
	background: #ffffff;
	border-radius: 16px;
	box-shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
	padding: 24px;
}

/* Tabs */
.nac-tabs {
	display: flex;
	gap: 8px;
	background: var(--nac-bg-panel);
	border-radius: 10px;
	padding: 4px;
	margin-bottom: 22px;
}

.nac-tab {
	flex: 1;
	border: none;
	background: transparent;
	padding: 12px 10px;
	font-size: 14px;
	font-weight: 600;
	color: var(--nac-text-dark);
	border-radius: 8px;
	cursor: pointer;
	transition: background 0.15s ease, color 0.15s ease;
}

.nac-tab-active {
	background: var(--nac-teal);
	color: #ffffff;
}

/* Panels */
.nac-panel {
	display: none;
}

.nac-panel-active {
	display: block;
}

.nac-field {
	margin-bottom: 18px;
}

.nac-field label {
	display: block;
	font-size: 14px;
	font-weight: 600;
	color: var(--nac-text-dark);
	margin-bottom: 8px;
}

.nac-info {
	display: inline-block;
	color: var(--nac-text-gray);
	cursor: help;
	font-size: 13px;
	margin-left: 2px;
}

.nac-input-row {
	display: flex;
	align-items: center;
	gap: 8px;
}

.nac-input {
	width: 100%;
	padding: 12px 14px;
	font-size: 15px;
	border: 1px solid var(--nac-border);
	border-radius: 10px;
	color: var(--nac-text-dark);
	background: #ffffff;
	transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.nac-input:focus {
	outline: none;
	border-color: var(--nac-teal);
	box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.15);
}

.nac-input-sep {
	color: var(--nac-text-gray);
	font-weight: 600;
	flex-shrink: 0;
}

.nac-input-suffix {
	color: var(--nac-text-gray);
	font-weight: 600;
	flex-shrink: 0;
}

.nac-checkbox-label {
	display: flex;
	align-items: center;
	gap: 8px;
	margin-top: 10px;
	font-size: 13px;
	font-weight: 400;
	color: var(--nac-text-gray);
	cursor: pointer;
}

.nac-checkbox-label input {
	width: 15px;
	height: 15px;
	accent-color: var(--nac-teal);
	cursor: pointer;
}

/* Buttons */
.nac-btn-row {
	display: flex;
	gap: 12px;
	margin-top: 24px;
}

.nac-btn {
	flex: 1;
	padding: 14px 18px;
	font-size: 15px;
	font-weight: 700;
	border-radius: 10px;
	cursor: pointer;
	transition: transform 0.05s ease, background 0.15s ease, opacity 0.15s ease;
	border: 2px solid transparent;
}

.nac-btn:active {
	transform: scale(0.98);
}

.nac-btn-primary {
	background: var(--nac-teal);
	color: #ffffff;
}

.nac-btn-primary:hover {
	background: var(--nac-teal-dark);
}

.nac-btn-secondary {
	background: #ffffff;
	color: var(--nac-teal-dark);
	border-color: var(--nac-teal);
}

.nac-btn-secondary:hover {
	background: var(--nac-teal-light);
}

/* Result section */
.nac-result {
	margin-top: 26px;
	padding-top: 22px;
	border-top: 1px solid var(--nac-border);
}

.nac-result-score-wrap {
	background: linear-gradient(135deg, var(--nac-teal), var(--nac-teal-dark));
	border-radius: 12px;
	padding: 20px;
	text-align: center;
	margin-bottom: 20px;
}

.nac-result-label {
	color: rgba(255, 255, 255, 0.9);
	font-size: 14px;
	font-weight: 600;
	margin-bottom: 6px;
}

.nac-result-score {
	color: #ffffff;
	font-size: 40px;
	font-weight: 800;
	letter-spacing: -0.5px;
}

.nac-breakdown-title {
	font-size: 15px;
	font-weight: 700;
	color: var(--nac-text-dark);
	margin-bottom: 10px;
}

.nac-breakdown-table {
	width: 100%;
	border-collapse: collapse;
	font-size: 13px;
}

.nac-breakdown-table th {
	text-align: left;
	color: var(--nac-text-gray);
	font-weight: 600;
	padding: 8px 6px;
	border-bottom: 2px solid var(--nac-border);
}

.nac-breakdown-table td {
	padding: 10px 6px;
	color: var(--nac-text-dark);
	border-bottom: 1px solid var(--nac-border);
}

.nac-breakdown-table tr:last-child td {
	border-bottom: none;
}

.nac-formula-note {
	margin-top: 16px;
	font-size: 12px;
	color: var(--nac-text-gray);
	background: var(--nac-bg-panel);
	padding: 10px 12px;
	border-radius: 8px;
	line-height: 1.5;
}

/* Error */
.nac-error {
	margin-top: 18px;
	padding: 12px 14px;
	background: #fef2f2;
	border: 1px solid #fecaca;
	color: var(--nac-red);
	border-radius: 10px;
	font-size: 14px;
	font-weight: 500;
}

/* Disclaimer */
.nac-disclaimer {
	text-align: center;
	font-size: 12px;
	color: var(--nac-text-gray);
	margin-top: 16px;
	line-height: 1.5;
}

/* Mobile responsiveness */
@media (max-width: 480px) {
	.nac-title {
		font-size: 22px;
	}

	.nac-card {
		padding: 18px;
	}

	.nac-btn-row {
		flex-direction: column;
	}

	.nac-result-score {
		font-size: 32px;
	}

	.nac-breakdown-table {
		font-size: 12px;
	}
}