:root {
	--bg: #f6f7f9;
	--surface: #ffffff;
	--text: #1d2330;
	--muted: #667085;
	--border: #dde1e8;
	--accent: #3b6fd8;
	--accent-text: #ffffff;
	--danger: #c4362b;
	--warn-bg: #fff4d6;
	--warn-text: #7a5400;
	--ok: #1c7f46; /* 4.5:1 on white and on --bg */
	color-scheme: light;
}
@media (prefers-color-scheme: dark) {
	:root {
		--bg: #14171c;
		--surface: #1d2128;
		--text: #e6e9ef;
		--muted: #9aa3b2;
		--border: #313744;
		--accent: #6b9bff;
		--accent-text: #0d1220;
		--danger: #ff7b70;
		--warn-bg: #3a2f12;
		--warn-text: #ffd37a;
		--ok: #5fd08f;
		color-scheme: dark;
	}
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
	margin: 0;
	background: var(--bg);
	color: var(--text);
	font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
	/* at least the window's height, so .legal can sit at its bottom */
	display: flex; flex-direction: column; min-height: 100vh; min-height: 100dvh;
}
header, main, footer { width: 100%; max-width: 1100px; margin: 0 auto; padding: 0 16px; }
header { padding-top: 28px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 1.8rem; line-height: 1.2; letter-spacing: -0.02em; font-weight: 800; }
.logo img { display: block; }
.logo span { color: var(--accent); }
h1.sub { font-size: 1rem; font-weight: 400; }
.brand { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.switch { display: flex; align-items: center; gap: 6px; font-size: 0.85rem; color: var(--muted); cursor: pointer; }
body:not(.advanced) .adv, body:not(.advanced) .page .mode { display: none; }
.sub, .hint { color: var(--muted); }
.sub { margin: 4px 0 20px; }
.hint { font-size: 0.85rem; }
footer { color: var(--muted); font-size: 0.8rem; padding-top: 32px; padding-bottom: 24px; }

button, select, input[type=text] {
	font: inherit;
	color: var(--text);
	background: var(--surface);
	border: 1px solid var(--border);
	border-radius: 8px;
	padding: 7px 12px;
}
button { cursor: pointer; }
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); font-weight: 600; }
button:disabled { opacity: 0.5; cursor: default; }
input[type=text] { width: 5.5em; }
input[aria-invalid=true] { border-color: var(--danger); outline-color: var(--danger); }

.controls input[type=text] { width: 4.5em; }
.controls .check { font-weight: 600; }
.controls :disabled:not(button) { opacity: 0.5; }
.drop .private { margin-top: 6px; font-size: 0.85rem; color: var(--ok); }
footer summary { cursor: pointer; width: max-content; }
footer details p { margin: 6px 0 0; }
.drop {
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: 4px;
	padding: 28px 16px;
	border: 2px dashed var(--border);
	border-radius: 14px;
	background: var(--surface);
	cursor: pointer;
	text-align: center;
}
.drop:hover, .drop.over { border-color: var(--accent); }
.drop:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.files { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0 6px; }
.file {
	display: flex; align-items: center; gap: 8px;
	background: var(--surface); border: 1px solid var(--border); border-radius: 999px;
	padding: 4px 6px 4px 12px; font-size: 0.85rem; max-width: 100%;
}
.file .dot { width: 10px; height: 10px; border-radius: 50%; flex: none; }
.file .name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file button { padding: 0 8px; border: none; background: none; color: var(--muted); font-size: 1.1rem; line-height: 1.4; }
.file button:hover { color: var(--danger); }

.pages {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(118px, 1fr));
	gap: 12px;
	margin: 10px 0 20px;
}
.page {
	position: relative;
	display: flex; flex-direction: column; align-items: center; gap: 4px;
	padding: 8px; border-radius: 10px;
	background: var(--surface); border: 2px solid transparent;
	cursor: grab; user-select: none;
}
.page:hover { border-color: var(--border); }
.page .thumb {
	width: 100%; aspect-ratio: 1 / 1.3;
	display: flex; align-items: center; justify-content: center;
}
.page canvas { max-width: 100%; max-height: 100%; box-shadow: 0 1px 4px rgba(0, 0, 0, 0.25); background: #fff; }
.page .label { align-self: stretch; font-size: 0.78rem; color: var(--muted); display: flex; align-items: center; gap: 4px; }
.page .label .dot { width: 8px; height: 8px; border-radius: 50%; flex: none; }
.page .label .num { flex: 1; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.page .toggle {
	display: inline-flex; align-items: center; justify-content: center;
	width: 30px; height: 30px; padding: 0; flex: none;
	border: 1px solid transparent; border-radius: 8px;
	background: none; color: var(--muted); cursor: pointer;
}
.page .toggle:hover, .page .toggle:focus-visible { color: var(--danger); border-color: var(--border); background: var(--bg); }
.page .toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.page .mode {
	flex: none; height: 24px; padding: 0 6px;
	border: 1px solid var(--border); border-radius: 999px;
	background: none; color: var(--muted); font-size: 0.72rem; cursor: pointer;
}
.page .mode:hover { color: var(--text); border-color: var(--muted); }
.page .mode:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.page .mode-colour, .page .mode-bw { color: var(--accent); border-color: var(--accent); font-weight: 600; }
.page.removed .thumb { opacity: 0.25; }
.page.removed .num { text-decoration: line-through; }
.page.removed .toggle { color: var(--accent-text); background: var(--accent); }
.page.removed .toggle:hover, .page.removed .toggle:focus-visible { color: var(--accent-text); background: var(--accent); filter: brightness(1.1); }
.page.removed::after {
	content: attr(data-removed); position: absolute; top: 42%; left: 50%; transform: translate(-50%, -50%);
	background: var(--danger); color: #fff; font-size: 0.75rem; font-weight: 600;
	padding: 2px 8px; border-radius: 999px; pointer-events: none;
}
.page.dragging { opacity: 0.4; }
.page.drop-before { box-shadow: -4px 0 0 var(--accent); }
.page.drop-after { box-shadow: 4px 0 0 var(--accent); }

.dock {
	position: sticky; bottom: 8px; margin-top: 16px;
	background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
	box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}
.dock > * { padding: 10px 12px; }
.dock > * + * { border-top: 1px solid var(--border); }
.dock .error { margin: 0; }
.controls { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.controls .spacer { flex: 1; }
.check { display: flex; align-items: center; gap: 6px; }

.status { display: flex; align-items: center; gap: 6px 12px; flex-wrap: wrap; }
.bar { flex: 1 1 200px; height: 8px; border-radius: 4px; background: var(--border); overflow: hidden; }
#bar-fill { height: 100%; width: 0; background: var(--accent); transition: width 0.15s; }
/* Text on its own line above the bar, so changing messages don't resize the bar. */
#status-text { font-size: 0.9rem; order: -1; flex-basis: 100%; min-height: 1.5em; }

.result {
	display: flex; flex-wrap: wrap; align-items: center; gap: 10px 16px;
}
.result .size { font-size: 1.15rem; font-weight: 600; }
.result .ok { color: var(--ok); }
.result .warn { background: var(--warn-bg); color: var(--warn-text); padding: 4px 10px; border-radius: 8px; font-size: 0.85rem; }
.result a.download {
	background: var(--accent); color: var(--accent-text); text-decoration: none; font-weight: 600;
	padding: 8px 14px; border-radius: 8px; margin-left: auto;
}
.error { color: var(--danger); }
.unsupported { background: var(--warn-bg); color: var(--warn-text); padding: 12px 16px; border-radius: 10px; }
html.unsupported .drop, html.unsupported .dock { display: none; }
footer { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-start; gap: 12px; }
footer details { flex: 1 1 300px; }
.legal { margin-top: auto; padding: 16px 16px 12px; text-align: center; color: var(--muted); font-size: 0.7rem; opacity: 0.6; }
.legal a { color: inherit; white-space: nowrap; text-decoration-color: transparent; }
.legal a:hover, .legal a:focus-visible { text-decoration-color: currentColor; }
footer a { color: inherit; }
footer .lang { display: flex; align-items: center; gap: 6px; }
footer .lang select { padding: 3px 6px; font-size: 0.8rem; }
.faq { margin-top: 72px; max-width: 70ch; font-size: 0.9rem; }
.faq summary { cursor: pointer; width: max-content; max-width: 100%; color: var(--muted); font-size: 0.8rem; }
.faq summary h2 { display: inline; font-size: inherit; font-weight: inherit; margin: 0; }
.faq[open] summary { color: inherit; }
.faq h3 { font-size: 1rem; margin: 18px 0 4px; }
.faq p { margin: 0; color: var(--muted); }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.page:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

button.link { background: none; border: 0; padding: 0; color: inherit; text-decoration: underline; cursor: pointer; font-size: 0.85rem; }
#report-line { margin: 0; color: var(--muted); }
dialog#contact {
	width: min(520px, calc(100% - 32px)); max-height: calc(100% - 32px); padding: 20px;
	background: var(--surface); color: var(--text); border: 1px solid var(--border); border-radius: 12px;
	box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}
dialog#contact::backdrop { background: rgba(0, 0, 0, 0.4); }
#contact-form { display: flex; flex-direction: column; gap: 6px; }
#contact-form h2 { margin: 0; font-size: 1.2rem; }
#contact-form p { margin: 0 0 6px; }
#contact-form label { font-size: 0.9rem; font-weight: 600; margin-top: 6px; }
#contact-form textarea, #contact-form input[type=email] {
	font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; width: 100%;
}
#contact-form textarea { resize: vertical; }
#contact-form .trap { position: absolute; left: -10000px; width: 1px; height: 1px; }
#contact-context { margin: 0 0 6px; padding: 8px 10px; font-size: 0.75rem; white-space: pre-wrap; overflow-wrap: anywhere; background: var(--bg); border-radius: 8px; color: var(--muted); }
#contact-status:empty { display: none; }
#contact-form .actions { display: flex; align-items: center; gap: 8px; margin-top: 8px; }
#contact-form .actions .spacer { flex: 1; }