:root {
	color-scheme: light;
	--bg: #f4f6fb;
	--panel: #ffffff;
	--panel-border: #d8dfeb;
	--text: #1a2233;
	--muted: #5d6880;
	--accent: #3852c7;
	--canvas-bg: #ffffff;
}

html,
body {
	height: 100%;
}

* {
	box-sizing: border-box;
}

body {
	margin: 0;
	font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
	font-size: 13.5px;
	line-height: 1.28;
	color: var(--text);
	background: linear-gradient(180deg, #f9fbff 0%, var(--bg) 100%);
	overflow: hidden;
	text-rendering: optimizeLegibility;
}

h1 {
	margin: 0;
	font-size: 1.45rem;
	letter-spacing: 0.08em;
}

p {
	margin: 0.2rem 0 0;
	font-size: 0.82rem;
	color: var(--muted);
}

#container {
	display: grid;
	grid-template-columns: minmax(360px, 430px) 1fr;
	gap: 0.75rem;
	padding: 0.75rem;
	height: 100dvh;
	min-height: 100dvh;
	overflow: hidden;
	align-items: start;
}

#controls-section {
	display: flex;
	flex-direction: column;
	background: var(--panel);
	border: 1px solid var(--panel-border);
	border-radius: 14px;
	overflow: hidden;
	align-self: start;
}

.panel-header {
	padding: 0.75rem 0.8rem 0.65rem;
	border-bottom: 1px solid var(--panel-border);
	background: linear-gradient(180deg, #ffffff 0%, #f8faff 100%);
}

.controls-scroll {
	padding: 0.65rem;
	overflow: visible;
}

fieldset {
	margin: 0 0 0.55rem;
	padding: 0.55rem;
	border: 1px solid var(--panel-border);
	border-radius: 10px;
	background: #fcfdff;
}

fieldset fieldset {
	margin-top: 0.4rem;
	margin-bottom: 0;
	padding: 0.45rem;
	background: #ffffff;
}

fieldset:last-child {
	margin-bottom: 0;
}

legend {
	padding: 0 0.35rem;
	font-weight: 600;
	font-size: 0.92em;
	color: #2b3650;
}

fieldset > div {
	display: flex;
	flex-wrap: wrap;
	gap: 0.35rem 0.7rem;
	margin-bottom: 0.3rem;
}

fieldset > div:last-child {
	margin-bottom: 0;
}

label {
	display: inline-flex;
	align-items: center;
	gap: 0.35rem;
	color: #2a3348;
}

input,
select {
	font: inherit;
	color: inherit;
	background: #fff;
	border: 1px solid #bec8da;
	border-radius: 6px;
	padding: 0.18rem 0.35rem;
	outline: none;
}

input:disabled,
select:disabled,
fieldset:disabled {
	opacity: 0.65;
	cursor: not-allowed;
}

input:focus,
select:focus {
	border-color: var(--accent);
	box-shadow: 0 0 0 2px rgba(56, 82, 199, 0.15);
}

input[type='number'],
input[type='range'],
input[type='text'],
input[type='search'] {
	width: 66px;
}

input.filename {
	width: 132px;
}

#coords-font {
	width: 140px;
}

input[type='checkbox'] {
	accent-color: var(--accent);
}

.button-link {
	display: inline-block;
	text-decoration: none;
	color: #fff;
	background: var(--accent);
	border-radius: 8px;
	padding: 0.3rem 0.55rem;
	font-size: 0.92em;
	font-weight: 600;
	transition: filter 120ms ease-out;
}

.button-link:hover {
	filter: brightness(1.03);
}

#map-section {
	display: flex;
	align-items: flex-start;
	justify-content: center;
	padding: 0.2rem;
	min-height: 0;
	overflow: auto;
}

.canvas-wrap {
	background: var(--canvas-bg);
	border: 1px solid var(--panel-border);
	border-radius: 14px;
	padding: 0.55rem;
	max-width: 100%;
	max-height: 100%;
	overflow: auto;
	box-shadow: 0 10px 30px rgba(24, 36, 77, 0.08);
}

#codon-canvas {
	display: block;
	max-width: 100%;
	height: auto;
}

@media (prefers-reduced-motion: reduce) {
	.button-link {
		transition: none;
	}
}

@media (max-width: 980px) {
	#container {
		grid-template-columns: 1fr;
	}

	.controls-scroll {
		max-height: none;
	}

	#map-section {
		justify-content: flex-start;
	}
}