/* =====================================================
   Ultimate GPA Calculator — Light Premium UI
   Prefix: ugc-
   ===================================================== */

.ugc-wrapper {
	--ugc-bg: #f4f7fb;
	--ugc-surface: #ffffff;
	--ugc-surface-2: #f0f4fa;
	--ugc-border: #d8e0ec;
	--ugc-border-strong: #c0cddc;
	--ugc-text: #1a2332;
	--ugc-text-muted: #5a6a80;
	--ugc-primary: #0ea5e9;
	--ugc-primary-hover: #0284c7;
	--ugc-primary-dim: rgba(14, 165, 233, 0.12);
	--ugc-primary-glow: rgba(14, 165, 233, 0.25);
	--ugc-accent: #8b5cf6;
	--ugc-success: #059669;
	--ugc-warning: #d97706;
	--ugc-danger: #dc2626;
	--ugc-radius: 12px;
	--ugc-radius-sm: 8px;
	--ugc-shadow: 0 2px 12px rgba(26, 35, 50, 0.08);
	--ugc-shadow-lg: 0 8px 30px rgba(26, 35, 50, 0.1);
	--ugc-font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
	--ugc-transition: 0.2s ease;

	font-family: var(--ugc-font);
	color: var(--ugc-text);
	line-height: 1.5;
	max-width: 960px;
	margin: 0 auto;
	padding: 1rem;
	box-sizing: border-box;
	-webkit-font-smoothing: antialiased;
	background: transparent;
}

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

/* Header */
.ugc-header {
	text-align: center;
	padding: 2rem 1.25rem 1.5rem;
	background: var(--ugc-surface);
	border: 1px solid var(--ugc-border);
	border-radius: var(--ugc-radius);
	box-shadow: var(--ugc-shadow);
	margin-bottom: 1.25rem;
	position: relative;
	overflow: hidden;
}

.ugc-header::before {
	content: "";
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	height: 4px;
	background: linear-gradient(90deg, var(--ugc-primary), var(--ugc-accent));
	border-radius: var(--ugc-radius) var(--ugc-radius) 0 0;
}

.ugc-title {
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 0.6rem;
	font-size: 1.75rem;
	font-weight: 700;
	margin: 0 0 0.4rem;
	color: var(--ugc-text);
	letter-spacing: -0.02em;
}

.ugc-title .ugc-icon {
	color: var(--ugc-primary);
}

.ugc-subtitle {
	margin: 0 0 1rem;
	color: var(--ugc-text-muted);
	font-size: 0.95rem;
}

.ugc-badges {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: 0.5rem;
}

.ugc-badge {
	display: inline-block;
	padding: 0.3rem 0.75rem;
	font-size: 0.75rem;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.04em;
	color: var(--ugc-primary);
	background: var(--ugc-primary-dim);
	border: 1px solid rgba(14, 165, 233, 0.25);
	border-radius: 999px;
}

.ugc-ad-slot {
	min-height: 0;
	margin: 1rem 0;
	text-align: center;
}

.ugc-ad-slot:empty {
	display: none;
	margin: 0;
}

/* Tabs */
.ugc-tabs {
	display: flex;
	gap: 0.35rem;
	background: var(--ugc-surface);
	border: 1px solid var(--ugc-border);
	border-radius: var(--ugc-radius);
	padding: 0.35rem;
	margin-bottom: 1.25rem;
	overflow-x: auto;
	-webkit-overflow-scrolling: touch;
	box-shadow: var(--ugc-shadow);
}

.ugc-tab {
	flex: 1;
	min-width: 110px;
	padding: 0.7rem 1rem;
	font-size: 0.875rem;
	font-weight: 600;
	color: var(--ugc-text-muted);
	background: transparent;
	border: none;
	border-radius: var(--ugc-radius-sm);
	cursor: pointer;
	transition: all var(--ugc-transition);
	white-space: nowrap;
	font-family: inherit;
}

.ugc-tab:hover {
	color: var(--ugc-text);
	background: var(--ugc-surface-2);
}

.ugc-tab:focus-visible {
	outline: 2px solid var(--ugc-primary);
	outline-offset: 2px;
}

.ugc-tab-active {
	color: #fff;
	background: var(--ugc-primary);
	box-shadow: 0 2px 8px var(--ugc-primary-glow);
}

.ugc-tab-active:hover {
	color: #fff;
	background: var(--ugc-primary-hover);
}

/* Panels */
.ugc-panel {
	display: none;
	animation: ugc-fadeIn 0.25s ease;
}

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

@keyframes ugc-fadeIn {
	from { opacity: 0; transform: translateY(6px); }
	to { opacity: 1; transform: translateY(0); }
}

/* Cards */
.ugc-card {
	background: var(--ugc-surface);
	border: 1px solid var(--ugc-border);
	border-radius: var(--ugc-radius);
	padding: 1.25rem;
	margin-bottom: 1.25rem;
	box-shadow: var(--ugc-shadow);
}

.ugc-card-header {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: 0.75rem;
	margin-bottom: 1rem;
}

.ugc-card-title {
	margin: 0;
	font-size: 1.1rem;
	font-weight: 650;
	color: var(--ugc-text);
}

/* Form controls */
.ugc-field {
	display: flex;
	flex-direction: column;
	gap: 0.3rem;
}

.ugc-field label,
.ugc-scale-selector label {
	font-size: 0.8rem;
	font-weight: 550;
	color: var(--ugc-text-muted);
}

.ugc-input,
.ugc-select {
	width: 100%;
	padding: 0.55rem 0.75rem;
	font-size: 0.9rem;
	font-family: inherit;
	color: var(--ugc-text);
	background: var(--ugc-surface);
	border: 1px solid var(--ugc-border-strong);
	border-radius: var(--ugc-radius-sm);
	transition: border-color var(--ugc-transition), box-shadow var(--ugc-transition);
}

.ugc-input:focus,
.ugc-select:focus {
	outline: none;
	border-color: var(--ugc-primary);
	box-shadow: 0 0 0 3px var(--ugc-primary-dim);
}

.ugc-input::placeholder {
	color: var(--ugc-text-muted);
	opacity: 0.7;
}

.ugc-select {
	cursor: pointer;
	appearance: none;
	background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='%235a6a80'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
	background-repeat: no-repeat;
	background-position: right 0.75rem center;
	padding-right: 2rem;
}

.ugc-mode-toggle {
	display: flex;
	gap: 1.25rem;
	margin-bottom: 1rem;
	flex-wrap: wrap;
}

.ugc-radio-label {
	display: flex;
	align-items: center;
	gap: 0.4rem;
	font-size: 0.875rem;
	cursor: pointer;
	color: var(--ugc-text-muted);
}

.ugc-radio-label input {
	accent-color: var(--ugc-primary);
	width: 16px;
	height: 16px;
}

.ugc-radio-label:has(input:checked) {
	color: var(--ugc-primary);
	font-weight: 600;
}

/* Column headers — exact match with rows */
.ugc-courses-header {
	display: grid;
	gap: 0.5rem;
	padding: 0.45rem 0.6rem;
	font-size: 0.72rem;
	font-weight: 650;
	text-transform: uppercase;
	letter-spacing: 0.04em;
	color: var(--ugc-text-muted);
	margin-bottom: 0.35rem;
}

.ugc-header-gpa {
	grid-template-columns: minmax(0, 2fr) minmax(90px, 1fr) minmax(90px, 1fr) minmax(80px, 0.8fr) 40px;
}

.ugc-header-cgpa {
	grid-template-columns: minmax(0, 2fr) minmax(110px, 1fr) minmax(110px, 1fr) 40px;
}

.ugc-header-grade {
	grid-template-columns: minmax(0, 2fr) minmax(80px, 1fr) minmax(80px, 1fr) minmax(80px, 1fr) 40px;
}

/* Rows */
.ugc-course-row {
	display: grid;
	gap: 0.5rem;
	align-items: center;
	padding: 0.5rem 0.6rem;
	background: var(--ugc-surface-2);
	border: 1px solid var(--ugc-border);
	border-radius: var(--ugc-radius-sm);
	margin-bottom: 0.45rem;
	transition: border-color var(--ugc-transition), box-shadow var(--ugc-transition);
	animation: ugc-rowIn 0.2s ease;
}

@keyframes ugc-rowIn {
	from { opacity: 0; transform: scale(0.98); }
	to { opacity: 1; transform: scale(1); }
}

.ugc-course-row:hover {
	border-color: var(--ugc-border-strong);
	box-shadow: 0 1px 4px rgba(26, 35, 50, 0.06);
}

.ugc-course-row[data-type="gpa"] {
	grid-template-columns: minmax(0, 2fr) minmax(90px, 1fr) minmax(90px, 1fr) minmax(80px, 0.8fr) 40px;
}

.ugc-course-row[data-type="cgpa"] {
	grid-template-columns: minmax(0, 2fr) minmax(110px, 1fr) minmax(110px, 1fr) 40px;
}

.ugc-course-row[data-type="grade"] {
	grid-template-columns: minmax(0, 2fr) minmax(80px, 1fr) minmax(80px, 1fr) minmax(80px, 1fr) 40px;
}

.ugc-course-row .ugc-input,
.ugc-course-row .ugc-select {
	padding: 0.5rem 0.65rem;
	font-size: 0.875rem;
	background: var(--ugc-surface);
}

.ugc-gp-display {
	font-size: 0.9rem;
	font-weight: 650;
	color: var(--ugc-primary);
	text-align: center;
	padding: 0.35rem 0;
}

.ugc-btn-remove {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 36px;
	height: 36px;
	padding: 0;
	background: transparent;
	border: 1px solid transparent;
	border-radius: var(--ugc-radius-sm);
	color: var(--ugc-text-muted);
	cursor: pointer;
	transition: all var(--ugc-transition);
	justify-self: center;
}

.ugc-btn-remove:hover {
	color: var(--ugc-danger);
	background: rgba(220, 38, 38, 0.08);
	border-color: rgba(220, 38, 38, 0.25);
}

.ugc-btn-remove:focus-visible {
	outline: 2px solid var(--ugc-danger);
}

/* Buttons */
.ugc-actions {
	display: flex;
	flex-wrap: wrap;
	gap: 0.5rem;
	margin-top: 0.85rem;
}

.ugc-calc-actions {
	justify-content: center;
	margin: 1rem 0 1.5rem;
}

.ugc-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 0.4rem;
	padding: 0.55rem 1.1rem;
	font-size: 0.875rem;
	font-weight: 600;
	font-family: inherit;
	border-radius: var(--ugc-radius-sm);
	border: 1px solid transparent;
	cursor: pointer;
	transition: all var(--ugc-transition);
	white-space: nowrap;
}

.ugc-btn:focus-visible {
	outline: 2px solid var(--ugc-primary);
	outline-offset: 2px;
}

.ugc-btn:active {
	transform: scale(0.97);
}

.ugc-btn-primary {
	color: #fff;
	background: var(--ugc-primary);
	box-shadow: 0 2px 8px var(--ugc-primary-glow);
}

.ugc-btn-primary:hover {
	background: var(--ugc-primary-hover);
	box-shadow: 0 4px 14px var(--ugc-primary-glow);
}

.ugc-btn-secondary {
	color: var(--ugc-primary);
	background: var(--ugc-primary-dim);
	border-color: rgba(14, 165, 233, 0.3);
}

.ugc-btn-secondary:hover {
	background: rgba(14, 165, 233, 0.2);
}

.ugc-btn-ghost {
	color: var(--ugc-text-muted);
	background: transparent;
	border-color: var(--ugc-border-strong);
}

.ugc-btn-ghost:hover {
	color: var(--ugc-text);
	background: var(--ugc-surface-2);
}

.ugc-btn-lg {
	padding: 0.75rem 1.75rem;
	font-size: 1rem;
}

/* Custom scale */
.ugc-custom-scale {
	margin-top: 1.25rem;
	padding-top: 1.25rem;
	border-top: 1px solid var(--ugc-border);
}

.ugc-custom-scale h4 {
	margin: 0 0 0.35rem;
	font-size: 1rem;
}

.ugc-hint {
	margin: 0 0 0.75rem;
	font-size: 0.85rem;
	color: var(--ugc-text-muted);
}

.ugc-custom-scale-row {
	display: grid;
	grid-template-columns: 1fr 1fr 40px;
	gap: 0.5rem;
	margin-bottom: 0.4rem;
	align-items: center;
}

.ugc-weight-warning {
	padding: 0.65rem 0.9rem;
	margin: 0.75rem 0;
	font-size: 0.875rem;
	color: var(--ugc-warning);
	background: rgba(217, 119, 6, 0.08);
	border: 1px solid rgba(217, 119, 6, 0.25);
	border-radius: var(--ugc-radius-sm);
}

/* Results */
.ugc-results {
	margin-bottom: 1.5rem;
	animation: ugc-fadeIn 0.3s ease;
}

.ugc-result-card {
	background: var(--ugc-surface);
	border: 1px solid var(--ugc-border);
	border-radius: var(--ugc-radius);
	padding: 1.5rem;
	box-shadow: var(--ugc-shadow-lg);
	border-top: 3px solid var(--ugc-primary);
}

.ugc-result-main {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: center;
	gap: 1.75rem;
	margin-bottom: 1.25rem;
}

.ugc-circle-wrap {
	position: relative;
	width: 140px;
	height: 140px;
}

.ugc-progress-ring {
	transform: rotate(-90deg);
}

.ugc-ring-bg {
	fill: none;
	stroke: var(--ugc-surface-2);
	stroke-width: 8;
}

.ugc-ring-fg {
	fill: none;
	stroke: var(--ugc-primary);
	stroke-width: 8;
	stroke-linecap: round;
	stroke-dasharray: 339.3;
	stroke-dashoffset: 339.3;
	transition: stroke-dashoffset 0.6s ease;
}

.ugc-circle-value {
	position: absolute;
	inset: 0;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
}

.ugc-result-score {
	font-size: 1.75rem;
	font-weight: 700;
	color: var(--ugc-primary);
	line-height: 1.1;
}

.ugc-result-max {
	font-size: 0.8rem;
	color: var(--ugc-text-muted);
}

.ugc-result-info {
	text-align: center;
	min-width: 180px;
}

.ugc-result-label {
	margin: 0 0 0.25rem;
	font-size: 0.8rem;
	font-weight: 650;
	text-transform: uppercase;
	letter-spacing: 0.06em;
	color: var(--ugc-text-muted);
}

.ugc-result-interpretation {
	margin: 0 0 0.75rem;
	font-size: 1.05rem;
	font-weight: 600;
	color: var(--ugc-success);
}

.ugc-result-stats {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	flex-direction: column;
	gap: 0.3rem;
}

.ugc-result-stats li {
	display: flex;
	justify-content: space-between;
	gap: 1.5rem;
	font-size: 0.875rem;
	color: var(--ugc-text-muted);
}

.ugc-result-stats strong {
	color: var(--ugc-text);
	font-weight: 650;
}

.ugc-result-actions {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: 0.5rem;
	margin-bottom: 0.75rem;
}

.ugc-disclaimer {
	margin: 0;
	font-size: 0.75rem;
	color: var(--ugc-text-muted);
	text-align: center;
	opacity: 0.85;
}

/* Goal */
.ugc-goal-card {
	margin-bottom: 1.5rem;
}

.ugc-goal-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
	gap: 0.75rem;
	margin-bottom: 1rem;
}

.ugc-goal-result {
	margin-top: 1rem;
	padding: 0.9rem 1rem;
	background: var(--ugc-primary-dim);
	border: 1px solid rgba(14, 165, 233, 0.3);
	border-radius: var(--ugc-radius-sm);
	font-size: 0.95rem;
}

.ugc-goal-result strong {
	color: var(--ugc-primary);
	font-size: 1.15rem;
}

.ugc-goal-warning {
	margin: 0.5rem 0 0;
	color: var(--ugc-danger);
	font-size: 0.875rem;
}

/* History */
.ugc-history-list {
	list-style: none;
	margin: 0;
	padding: 0;
}

.ugc-history-item {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 0.75rem;
	padding: 0.6rem 0.75rem;
	background: var(--ugc-surface-2);
	border: 1px solid var(--ugc-border);
	border-radius: var(--ugc-radius-sm);
	margin-bottom: 0.4rem;
	font-size: 0.875rem;
}

.ugc-history-item button {
	flex-shrink: 0;
}

/* SEO */
.ugc-seo-content {
	margin: 2rem 0 1.5rem;
	padding: 1.5rem;
	background: var(--ugc-surface);
	border: 1px solid var(--ugc-border);
	border-radius: var(--ugc-radius);
	box-shadow: var(--ugc-shadow);
}

.ugc-seo-content h2 {
	margin: 1.5rem 0 0.5rem;
	font-size: 1.2rem;
	color: var(--ugc-text);
}

.ugc-seo-content h2:first-child {
	margin-top: 0;
}

.ugc-seo-content p,
.ugc-seo-content ol {
	margin: 0 0 0.75rem;
	font-size: 0.95rem;
	color: var(--ugc-text-muted);
}

.ugc-seo-content ol {
	padding-left: 1.25rem;
}

.ugc-seo-content li {
	margin-bottom: 0.3rem;
}

/* FAQ */
.ugc-faq {
	margin-bottom: 2rem;
}

.ugc-faq > h2 {
	margin: 0 0 1rem;
	font-size: 1.3rem;
	text-align: center;
	color: var(--ugc-text);
}

.ugc-accordion {
	display: flex;
	flex-direction: column;
	gap: 0.4rem;
}

.ugc-faq-item {
	background: var(--ugc-surface);
	border: 1px solid var(--ugc-border);
	border-radius: var(--ugc-radius-sm);
	overflow: hidden;
	box-shadow: var(--ugc-shadow);
}

.ugc-faq-item summary {
	padding: 0.85rem 1rem;
	font-weight: 600;
	font-size: 0.95rem;
	cursor: pointer;
	list-style: none;
	display: flex;
	align-items: center;
	justify-content: space-between;
	color: var(--ugc-text);
	transition: background var(--ugc-transition);
}

.ugc-faq-item summary::-webkit-details-marker {
	display: none;
}

.ugc-faq-item summary::after {
	content: "+";
	font-size: 1.2rem;
	color: var(--ugc-primary);
	font-weight: 400;
}

.ugc-faq-item[open] summary::after {
	content: "−";
}

.ugc-faq-item summary:hover {
	background: var(--ugc-surface-2);
}

.ugc-faq-item summary:focus-visible {
	outline: 2px solid var(--ugc-primary);
	outline-offset: -2px;
}

.ugc-faq-item p {
	margin: 0;
	padding: 0 1rem 1rem;
	font-size: 0.9rem;
	color: var(--ugc-text-muted);
}

/* Toast */
.ugc-toast-container {
	position: fixed;
	bottom: 1.5rem;
	right: 1.5rem;
	z-index: 99999;
	display: flex;
	flex-direction: column;
	gap: 0.5rem;
	pointer-events: none;
}

.ugc-toast {
	padding: 0.75rem 1.15rem;
	font-size: 0.875rem;
	font-weight: 550;
	color: #fff;
	background: var(--ugc-primary);
	border-radius: var(--ugc-radius-sm);
	box-shadow: 0 4px 20px rgba(14, 165, 233, 0.35);
	animation: ugc-toastIn 0.3s ease;
	pointer-events: auto;
}

.ugc-toast-error {
	background: var(--ugc-danger);
	box-shadow: 0 4px 20px rgba(220, 38, 38, 0.3);
}

@keyframes ugc-toastIn {
	from { opacity: 0; transform: translateY(12px); }
	to { opacity: 1; transform: translateY(0); }
}

.ugc-desktop-only {
	display: grid;
}

[hidden] {
	display: none !important;
}

/* Responsive */
@media (max-width: 768px) {
	.ugc-wrapper {
		padding: 0.75rem;
	}

	.ugc-title {
		font-size: 1.4rem;
	}

	.ugc-courses-header {
		display: none;
	}

	.ugc-course-row[data-type="gpa"],
	.ugc-course-row[data-type="cgpa"],
	.ugc-course-row[data-type="grade"] {
		grid-template-columns: 1fr 1fr;
		gap: 0.5rem;
		padding: 0.75rem;
	}

	.ugc-course-row[data-type="gpa"] > *:nth-child(1),
	.ugc-course-row[data-type="cgpa"] > *:nth-child(1),
	.ugc-course-row[data-type="grade"] > *:nth-child(1) {
		grid-column: 1 / -1;
	}

	.ugc-course-row .ugc-btn-remove {
		justify-self: end;
	}

	.ugc-custom-scale-row {
		grid-template-columns: 1fr 1fr 36px;
	}

	.ugc-result-main {
		flex-direction: column;
	}

	.ugc-tabs {
		padding: 0.25rem;
	}

	.ugc-tab {
		padding: 0.6rem 0.7rem;
		font-size: 0.8rem;
		min-width: 90px;
	}

	.ugc-toast-container {
		left: 1rem;
		right: 1rem;
		bottom: 1rem;
	}
}

@media (max-width: 480px) {
	.ugc-header {
		padding: 1.5rem 0.75rem 1.25rem;
	}

	.ugc-badges {
		gap: 0.35rem;
	}

	.ugc-badge {
		font-size: 0.7rem;
		padding: 0.25rem 0.6rem;
	}

	.ugc-btn {
		padding: 0.5rem 0.9rem;
		font-size: 0.8rem;
	}

	.ugc-btn-lg {
		width: 100%;
	}

	.ugc-actions {
		justify-content: center;
	}
}

@media (prefers-reduced-motion: reduce) {
	.ugc-wrapper *,
	.ugc-wrapper *::before,
	.ugc-wrapper *::after {
		animation-duration: 0.01ms !important;
		transition-duration: 0.01ms !important;
	}
}