:root {
	--bg: #f6f7fb;
	--card-bg: #ffffff;
	--border: #e5e7eb;
	--text: #0f172a;
	--text-secondary: #475569;
	--text-muted: #94a3b8;
	--accent: #0d9488;
	--accent-hover: #0f766e;
	--danger: #dc2626;
	--danger-bg: #fef2f2;
	--success: #047857;
	--success-bg: #ecfdf5;
	--radius-card: 12px;
	--radius-input: 8px;
}

* {
	box-sizing: border-box;
}

body {
	margin: 0;
	font-family: 'Inter', -apple-system, 'Segoe UI', sans-serif;
	background: var(--bg);
	color: var(--text);
}

h2 {
	margin: 0;
}

/* Top nav */

.topnav {
	position: sticky;
	top: 0;
	background: var(--card-bg);
	border-bottom: 1px solid var(--border);
	z-index: 10;
}

.topnav-inner {
	max-width: 1100px;
	margin: 0 auto;
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 14px 20px;
}

.brand {
	font-weight: 700;
	font-size: 1.05rem;
}

.nav-links a {
	margin-left: 24px;
	text-decoration: none;
	color: var(--text-secondary);
	font-weight: 600;
	font-size: 0.95rem;
	padding-bottom: 4px;
	border-bottom: 2px solid transparent;
}

.nav-links a:hover,
.nav-links a.active {
	color: var(--accent);
	border-color: var(--accent);
}

/* Page layout */

.page {
	max-width: 1100px;
	margin: 0 auto;
	padding: 24px 20px 60px;
	display: flex;
	flex-direction: column;
	gap: 24px;
}

.card {
	background: var(--card-bg);
	border: 1px solid var(--border);
	border-radius: var(--radius-card);
	box-shadow: 0 1px 3px rgba(15, 23, 42, 0.08);
	padding: 20px;
}

.card-header {
	margin-bottom: 12px;
}

.chart {
	min-height: 400px;
}

/* Filter disclosure */

.filter {
	border: 1px solid var(--border);
	border-radius: var(--radius-input);
	padding: 8px 12px;
	background: #fafafb;
	margin-bottom: 16px;
}

.filter summary {
	cursor: pointer;
	font-weight: 600;
	color: var(--text-secondary);
	font-size: 0.9rem;
}

.filter-grid {
	display: flex;
	flex-wrap: wrap;
	gap: 8px 20px;
	margin-top: 12px;
}

.filter-grid label {
	display: flex;
	align-items: center;
	gap: 6px;
	font-size: 0.88rem;
	color: var(--text);
	white-space: nowrap;
}

.filter-grid input[type='checkbox'] {
	accent-color: var(--accent);
	width: 16px;
	height: 16px;
}

/* Entry form */

.banner {
	padding: 12px 16px;
	border-radius: var(--radius-input);
	margin-bottom: 20px;
	font-weight: 600;
	font-size: 0.92rem;
}

.banner.success {
	background: var(--success-bg);
	color: var(--success);
	border: 1px solid #a7f3d0;
}

.banner.error {
	background: var(--danger-bg);
	color: var(--danger);
	border: 1px solid #fecaca;
}

.group {
	border: 1px solid var(--border);
	border-radius: var(--radius-card);
	padding: 20px;
	margin: 0 0 20px;
	background: var(--card-bg);
}

.group legend {
	font-weight: 700;
	font-size: 1.1rem;
	padding: 0 8px;
}

.date-field {
	max-width: 220px;
	margin-bottom: 20px;
}

.field-grid {
	display: grid;
	grid-template-columns: repeat(2, 1fr);
	gap: 16px;
	margin-top: 4px;
}

@media (max-width: 640px) {
	.field-grid {
		grid-template-columns: 1fr;
	}
}

.field label {
	display: block;
	font-size: 0.85rem;
	color: var(--text-secondary);
	margin-bottom: 4px;
	font-weight: 600;
}

.field input {
	width: 100%;
	padding: 8px 10px;
	border: 1px solid var(--border);
	border-radius: var(--radius-input);
	font-size: 1rem;
	font-family: inherit;
	color: var(--text);
	background: #fff;
}

.field input:focus {
	outline: 2px solid var(--accent);
	outline-offset: 1px;
	border-color: var(--accent);
}

.field .hint {
	font-size: 0.75rem;
	color: var(--text-muted);
	margin-top: 3px;
}

.field.invalid input {
	border-color: var(--danger);
}

.field .error-text {
	color: var(--danger);
	font-size: 0.75rem;
	margin-top: 3px;
}

.btn-primary {
	background: var(--accent);
	color: #fff;
	border: none;
	padding: 10px 28px;
	border-radius: var(--radius-input);
	font-weight: 600;
	font-size: 1rem;
	cursor: pointer;
}

.btn-primary:hover {
	background: var(--accent-hover);
}

.btn-primary:disabled {
	opacity: 0.6;
	cursor: not-allowed;
}