:root {
	--bg: #f4f7fb;
	--bg-top: #f8fbff;
	--surface: #ffffff;
	--surface-alt: #f8fafc;
	--text: #12263a;
	--text-soft: #526377;
	--text-faint: #6b7c93;
	--brand: #0f4c81;
	--brand-dark: #0b3559;
	--brand-light: #e8f1f8;
	--border: #d9e2ec;
	--border-strong: #bcccdc;
	--warning-bg: #fff7e6;
	--warning-border: #f2d49b;
	--danger: #b42318;
	--danger-bg: #fef3f2;
	--shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06);
	--shadow-md: 0 10px 30px rgba(15, 23, 42, 0.08);
	--radius-sm: 10px;
	--radius-md: 16px;
	--radius-lg: 24px;
	--pill: 999px;
	--max-width: 1360px;
	--transition: 0.18s ease;
}

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

html {
	font-size: 16px;
}

body {
	margin: 0;
	font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
	color: var(--text);
	background:
		radial-gradient(circle at top, rgba(15, 76, 129, 0.08), transparent 30%),
		linear-gradient(180deg, var(--bg-top) 0%, var(--bg) 100%);
}

img {
	max-width: 100%;
	display: block;
}

a {
	color: var(--brand);
	text-decoration: none;
}

a:hover {
	text-decoration: underline;
}

button,
input,
select,
textarea {
	font: inherit;
}

button {
	cursor: pointer;
}

code {
	font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
	font-size: 0.92em;
}

.app-shell {
	width: min(var(--max-width), calc(100% - 2rem));
	margin: 0 auto;
	padding: 2rem 0 3rem;
}

.page-header {
	margin-bottom: 1.5rem;
}

.page-header__inner {
	display: grid;
	gap: 1rem;
	padding: 1.5rem;
	border-radius: var(--radius-lg);
	background: linear-gradient(135deg, rgba(15, 76, 129, 0.98), rgba(11, 53, 89, 0.98));
	color: #fff;
	box-shadow: var(--shadow-md);
}

.page-header__content {
	max-width: 760px;
}

.eyebrow {
	margin: 0 0 0.5rem;
	font-size: 0.85rem;
	font-weight: 800;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	opacity: 0.9;
}

.page-header h1 {
	margin: 0 0 0.75rem;
	font-size: clamp(2rem, 3vw, 2.75rem);
	line-height: 1.05;
	letter-spacing: -0.03em;
}

.lede {
	margin: 0;
	max-width: 60ch;
	color: rgba(255, 255, 255, 0.92);
	line-height: 1.65;
}

.tool-switcher {
	display: flex;
	flex-wrap: wrap;
	gap: 0.75rem;
}

.tool-switcher__link {
	appearance: none;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	border: 1px solid rgba(255, 255, 255, 0.22);
	background: rgba(255, 255, 255, 0.08);
	color: #fff;
	border-radius: var(--pill);
	padding: 0.82rem 1rem;
	font-weight: 700;
	transition:
		background var(--transition),
		transform var(--transition),
		border-color var(--transition);
	text-decoration: none;
}

.tool-switcher__link:hover {
	background: rgba(255, 255, 255, 0.16);
	transform: translateY(-1px);
	text-decoration: none;
}

.tool-switcher__link--current {
	background: #fff;
	color: var(--brand-dark);
	border-color: #fff;
	cursor: default;
}

.layout {
	display: grid;
	grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.9fr);
	gap: 1.5rem;
	align-items: start;
}

.controls-column,
.preview-column {
	min-width: 0;
}

.controls-column {
	display: grid;
	gap: 1rem;
}

.preview-sticky {
	position: sticky;
	top: 1rem;
}

.card {
	background: var(--surface);
	border: 1px solid rgba(15, 23, 42, 0.06);
	border-radius: var(--radius-md);
	box-shadow: var(--shadow-sm);
}

.guidance-card,
.preview-card {
	padding: 1.25rem;
}

.form-card {
	overflow: hidden;
	padding: 0;
}

.form-section {
	padding: 1.25rem;
}

.form-section + .form-section {
	border-top: 1px solid var(--border);
}

.section-heading {
	display: grid;
	gap: 0.45rem;
	margin-bottom: 1rem;
}

.section-heading h2,
.preview-card h2 {
	margin: 0;
	line-height: 1.2;
}

.section-heading p,
.preview-card__title p,
.page-footer {
	margin: 0;
	color: var(--text-soft);
	line-height: 1.65;
}

.callout {
	margin-top: 1rem;
	padding: 1rem;
	border-radius: var(--radius-sm);
	border: 1px solid var(--border);
}

.callout--warning {
	background: var(--warning-bg);
	border-color: var(--warning-border);
}

.callout h3 {
	margin: 0 0 0.75rem;
	font-size: 1rem;
}

.callout p {
	margin: 0.4rem 0 0;
	line-height: 1.65;
}

.guidance-list {
	margin: 0;
	padding-left: 1.15rem;
	line-height: 1.7;
}

.guidance-list li + li {
	margin-top: 0.3rem;
}

.validation-box {
	margin: 1.25rem;
	padding: 1rem;
	border: 1px solid #f5c2c7;
	border-left: 4px solid rgb(186, 12, 47);
	border-radius: 10px;
	background: #fff5f5;
}

.validation-box h3 {
	margin: 0 0 0.5rem;
	font-size: 1rem;
	line-height: 1.3;
	font-weight: 700;
	color: var(--brand);
}

.validation-box ul {
	margin: 0 0 0 1.1rem;
	padding: 0;
	list-style: disc;
}

.validation-box li {
	margin: 0.35rem 0;
	line-height: 1.5;
	color: var(--text);
}

.button--primary,
.form-actions button {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-height: 46px;
	padding: 0.85rem 1.15rem;
	border-radius: 999px;
	border: 1px solid transparent;
	font-weight: 700;
	transition:
		transform 0.15s ease,
		box-shadow 0.15s ease,
		background 0.15s ease,
		border-color 0.15s ease;
	background: var(--brand);
	color: #fff;
	border-color: var(--brand);
	box-shadow: 0 10px 20px rgba(15, 76, 129, 0.18);
}

.button--primary:hover,
.form-actions button:hover {
	transform: translateY(-1px);
	background: var(--brand-dark);
	border-color: var(--brand-dark);
	text-decoration: none;
}

.button--disabled,
button:disabled {
	opacity: 0.55;
	cursor: not-allowed;
	box-shadow: none;
	transform: none;
}

.button--disabled:hover,
button:disabled:hover {
	transform: none;
	background: var(--brand);
	border-color: var(--brand);
}

.generator-form label,
.form-section label {
	display: block;
	margin: 0 0 0.65rem;
	font-weight: 700;
	color: var(--text);
}

.generator-form label span,
.form-section label span {
	color: var(--danger);
}

.generator-form input,
.generator-form select,
.generator-form textarea,
.form-section input,
.form-section select,
.form-section textarea {
	width: 100%;
	padding: 0.85rem 0.95rem;
	border-radius: var(--radius-sm);
	border: 1px solid var(--border);
	background: #fff;
	color: var(--text);
	transition:
		border-color var(--transition),
		box-shadow var(--transition),
		background-color var(--transition);
	box-shadow: inset 0 1px 2px rgba(16, 24, 40, 0.02);
}

.generator-form input::placeholder,
.generator-form textarea::placeholder,
.form-section input::placeholder,
.form-section textarea::placeholder {
	color: var(--text-faint);
}

.generator-form input:focus,
.generator-form select:focus,
.generator-form textarea:focus,
.form-section input:focus,
.form-section select:focus,
.form-section textarea:focus {
	outline: none;
	border-color: rgba(15, 76, 129, 0.55);
	box-shadow:
		0 0 0 4px rgba(15, 76, 129, 0.12),
		inset 0 1px 2px rgba(16, 24, 40, 0.02);
}

input.error,
select.error,
textarea.error {
	border-color: var(--danger);
	background-color: var(--danger-bg);
}

select option:disabled {
	color: #9aa5b1;
}

#grade optgroup {
	font-style: normal;
	font-weight: 700;
	color: var(--text);
}

#grade option {
	font-weight: 500;
	color: var(--text);
}

#grade option:disabled {
	color: #9aa5b1;
}

textarea {
	min-height: 96px;
	resize: vertical;
}

.dual {
	display: grid;
	grid-template-columns: 140px 1fr;
	gap: 0.75rem;
	margin-bottom: 0.75rem;
}

.grade-name-row {
	display: grid;
	grid-template-columns: 180px minmax(220px, 1fr) minmax(220px, 1.2fr);
	gap: 0.75rem;
}

.checkbox-row {
	margin-top: 0.9rem;
	display: flex;
	align-items: center;
	gap: 0.6rem;
}

.checkbox-row input[type="checkbox"] {
	width: auto;
	margin: 0;
}

.checkbox-row label {
	margin: 0;
	font-weight: 600;
}

.preview-card {
	overflow: hidden;
}

.preview-card__header {
	display: flex;
	justify-content: space-between;
	align-items: flex-start;
	gap: 1rem;
	margin-bottom: 1rem;
}

.preview-card__title {
	display: grid;
	gap: 0.35rem;
}

.preview-frame {
	position: relative;
	padding: 0.75rem;
	border: 1px solid var(--border);
	border-radius: 14px;
	background: linear-gradient(180deg, #fbfdff 0%, #f5f8fb 100%);
}

.preview-frame iframe,
#pdf {
	width: 100%;
	height: 72vh;
	min-height: 720px;
	border: 0;
	border-radius: 10px;
	background: #fff;
	display: block;
}

.preview-overlay {
	position: absolute;
	inset: 0.75rem;
	display: flex;
	align-items: center;
	justify-content: center;
	border-radius: 10px;
	background: rgba(255, 255, 255, 0.72);
	backdrop-filter: blur(1px);
}

.preview-overlay__content {
	max-width: 320px;
	padding: 0.85rem 1rem;
	border-radius: 12px;
	background: #fff;
	border: 1px solid var(--border);
	box-shadow: var(--shadow-sm);
	text-align: center;
	font-weight: 600;
	color: var(--text-soft);
	line-height: 1.5;
}

.preview-disabled {
	opacity: 0.7;
	pointer-events: none;
	user-select: none;
}

.field-note {
	margin: 0.5rem 0 0;
	font-size: 0.9rem;
	line-height: 1.5;
	color: var(--text-soft);
}

.page-footer {
	padding: 0.1rem 0.2rem 0;
	font-size: 0.92rem;
}

.page-footer a {
	color: inherit;
	text-decoration: underline;
}

.muted {
	color: var(--text-soft);
}

@media (max-width: 1120px) {
	.layout {
		grid-template-columns: 1fr;
	}

	.preview-sticky {
		position: static;
	}

	.preview-frame iframe,
	#pdf {
		height: 70vh;
		min-height: 560px;
	}
}

@media (max-width: 840px) {
	.grade-name-row {
		grid-template-columns: 1fr;
	}

	.dual {
		grid-template-columns: 1fr;
	}
}

@media (max-width: 720px) {
	.app-shell {
		width: min(100% - 1rem, var(--max-width));
		padding-top: 1rem;
	}

	.page-header__inner,
	.guidance-card,
	.preview-card {
		padding: 1rem;
	}

	.form-section {
		padding: 1rem;
	}

	.validation-box {
		margin: 1rem;
	}

	.tool-switcher {
		flex-direction: column;
	}

	.tool-switcher__link {
		width: 100%;
	}

	.page-header h1 {
		font-size: 1.9rem;
	}

	.preview-frame iframe,
	#pdf {
		height: 62vh;
		min-height: 420px;
	}
}

.validation-box {
	margin: 1rem 1.25rem 0;
	padding: 14px 16px;
	border: 1px solid #f2b8bf;
	border-left: 4px solid rgb(186, 12, 47);
	border-radius: 10px;
	background: #fff5f5;
}

.validation-box h3 {
	margin: 0 0 8px;
	font-size: 16px;
	font-weight: 700;
	color: #001489;
}

.validation-box ul {
	margin: 0 0 0 18px;
	padding: 0;
	list-style: disc;
}

.validation-box li {
	margin: 6px 0;
	line-height: 1.45;
}