:root {
	--paper: #f6f3ea;
	--ink: #211d17;
	--muted: #6f6a5d;
	--line: #d9d3c1;
	--stamp: #a13d2c;
	--stamp-dark: #7f2f21;
	--ok: #3d5c45;
}

* {
	box-sizing: border-box;
}

html,
body {
	height: 100%;
}

body {
	margin: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	min-height: 100vh;
	padding: 32px 16px;
	background: var(--paper);
	background-image: radial-gradient(circle at 1px 1px, rgba(33, 29, 23, 0.06) 1px, transparent 0);
	background-size: 22px 22px;
	color: var(--ink);
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.card {
	width: 100%;
	max-width: 460px;
	background: #fffdf8;
	border: 1px solid var(--line);
	padding: 40px 36px;
}

h1 {
	margin: 0 0 6px;
	font-family: Georgia, "Songti SC", "STSong", serif;
	font-size: 28px;
	font-weight: 600;
	letter-spacing: 0.01em;
}

.subtitle {
	margin: 0 0 28px;
	color: var(--muted);
	font-size: 14.5px;
	line-height: 1.5;
}

form {
	display: flex;
	flex-direction: column;
	gap: 18px;
}

label {
	font-size: 13px;
	color: var(--muted);
}

#url-input {
	width: 100%;
	padding: 12px 14px;
	margin-top: 6px;
	border: 1px solid var(--line);
	background: #fdfcf8;
	color: var(--ink);
	font-family: "SF Mono", "Menlo", "Consolas", monospace;
	font-size: 14px;
}

#url-input:focus {
	outline: 2px solid var(--stamp);
	outline-offset: 1px;
}

fieldset.format-choice {
	border: none;
	padding: 0;
	margin: 0;
	display: flex;
	gap: 12px;
}

fieldset.format-choice legend {
	font-size: 13px;
	color: var(--muted);
	padding: 0 0 8px;
}

.radio {
	flex: 1;
	display: flex;
	align-items: flex-start;
	gap: 8px;
	padding: 12px;
	border: 1px solid var(--line);
	cursor: pointer;
	transition: border-color 0.15s ease, background-color 0.15s ease;
}

.radio:has(input:checked) {
	border-color: var(--stamp);
	background: #fbf1ec;
}

.radio input {
	margin-top: 3px;
	accent-color: var(--stamp);
}

.radio span {
	display: flex;
	flex-direction: column;
	gap: 2px;
}

.radio strong {
	font-size: 14px;
}

.radio small {
	color: var(--muted);
	font-size: 12px;
	line-height: 1.4;
}

button#submit-btn {
	margin-top: 4px;
	padding: 13px 16px;
	border: 1px solid var(--stamp-dark);
	background: var(--stamp);
	color: #fff9f4;
	font-family: "SF Mono", "Menlo", "Consolas", monospace;
	font-size: 14px;
	letter-spacing: 0.02em;
	cursor: pointer;
	transition: background-color 0.15s ease;
}

button#submit-btn:hover:not(:disabled) {
	background: var(--stamp-dark);
}

button#submit-btn:disabled {
	opacity: 0.6;
	cursor: progress;
}

.status {
	margin-top: 20px;
	padding: 12px 14px;
	border: 1px solid var(--line);
	font-size: 13.5px;
	line-height: 1.5;
}

.status.status-loading {
	color: var(--muted);
}

.status.status-ok {
	border-color: var(--ok);
	color: var(--ok);
}

.status.status-error {
	border-color: var(--stamp);
	color: var(--stamp-dark);
}

@media (prefers-reduced-motion: reduce) {
	* {
		transition: none !important;
	}
}