/**
 * Страница вложений.
 *
 * Размеры в rem: тема задаёт масштаб интерфейса одним правилом на html, и
 * страница обязана ехать вместе с ней.
 */

.bst-handout {
	--bst-h-ink: #0a0a0a;
	--bst-h-graphite: #3d3d3d;
	--bst-h-mid: #767676;
	--bst-h-line: #c9c9c9;
	--bst-h-rule: #e6e6e6;
	--bst-h-wash: #f2f2f1;
	--bst-h-paper: #fff;

	max-width: 53.75rem;
	margin: 0 auto;
	color: var(--bst-h-ink);
	font-size: 1rem;
	line-height: 1.5;
}

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

.bst-handout button,
.bst-handout input,
.bst-handout textarea,
.bst-handout select {
	font: inherit;
	color: inherit;
}

.bst-handout :focus-visible {
	outline: 2px solid var(--bst-h-ink);
	outline-offset: 2px;
}

/* ---------- типографика ---------- */

.bst-handout h1 {
	margin: 0;
	font-size: clamp(2.125rem, 6.4vw, 3.625rem);
	line-height: 1.03;
	letter-spacing: -0.028em;
	font-weight: 700;
	text-wrap: balance;
}

.bst-handout h1 .thin {
	font-weight: 400;
	color: var(--bst-h-graphite);
}

.bst-handout h2 {
	margin: 0;
	font-size: clamp(1.3125rem, 3.2vw, 1.6875rem);
	line-height: 1.15;
	letter-spacing: -0.02em;
	font-weight: 700;
	text-wrap: balance;
}

.bst-handout .bst-h-h3 {
	font-size: 1.25rem;
}

.bst-handout .bst-h-lede {
	margin: 1.25rem 0 0;
	max-width: 56ch;
	color: var(--bst-h-graphite);
	font-size: 1.0625rem;
	line-height: 1.6;
}

.bst-handout .bst-h-note {
	margin: 0.625rem 0 0;
	font-size: 0.8125rem;
	color: var(--bst-h-mid);
	line-height: 1.55;
}

.bst-handout .bst-h-hint {
	margin: 0;
	font-size: 0.8125rem;
	color: var(--bst-h-mid);
}

.bst-handout .bst-h-err {
	display: none;
	margin: 0;
	font-size: 0.8125rem;
	color: var(--bst-h-ink);
	font-weight: 600;
}

.bst-handout .bst-h-err.on {
	display: block;
}

.bst-handout .bst-h-err::before {
	content: "— ";
}

.bst-handout .bst-h-screen {
	animation: bst-h-rise 0.34s ease both;
}

@keyframes bst-h-rise {
	from { opacity: 0; transform: translateY(0.5rem); }
	to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
	.bst-handout .bst-h-screen { animation: none; }
}

/* ---------- блоки ---------- */

.bst-handout .bst-h-block {
	margin-top: 1.75rem;
	background: var(--bst-h-paper);
	border: 1px solid var(--bst-h-line);
	padding: clamp(1.375rem, 3.4vw, 2.125rem);
}

.bst-handout .bst-h-next-block {
	margin-top: 2.125rem;
}

.bst-handout .bst-h-stepmark {
	display: block;
	margin-bottom: 0.625rem;
	font-size: 0.6875rem;
	letter-spacing: 0.16em;
	text-transform: uppercase;
	color: var(--bst-h-mid);
	font-variant-numeric: tabular-nums;
}

.bst-handout .bst-h-qnum {
	margin: 1.125rem 0 0;
}

.bst-handout .bst-h-field {
	display: flex;
	flex-direction: column;
	gap: 0.5625rem;
	margin-top: 1.375rem;
}

.bst-handout .bst-h-lbl {
	font-size: 0.75rem;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--bst-h-graphite);
	font-weight: 500;
}

.bst-handout input[type="text"],
.bst-handout textarea,
.bst-handout select {
	width: 100%;
	background: var(--bst-h-paper);
	border: 1px solid var(--bst-h-line);
	border-bottom: 2px solid var(--bst-h-ink);
	border-radius: 0;
	padding: 0.8125rem 0.875rem;
	font-size: 1.0625rem;
	letter-spacing: 0.02em;
	box-shadow: none;
}

.bst-handout input[type="text"] {
	font-variant-numeric: tabular-nums;
}

.bst-handout textarea {
	min-height: 6.5rem;
	resize: vertical;
	font-size: 1rem;
	line-height: 1.5;
}

.bst-handout input::placeholder,
.bst-handout textarea::placeholder {
	color: #b0b0b0;
}

.bst-handout select {
	appearance: none;
	cursor: pointer;
	background-image:
		linear-gradient(45deg, transparent 50%, var(--bst-h-ink) 50%),
		linear-gradient(135deg, var(--bst-h-ink) 50%, transparent 50%);
	background-position: calc(100% - 1.25rem) 1.3125rem, calc(100% - 0.875rem) 1.3125rem;
	background-size: 6px 6px, 6px 6px;
	background-repeat: no-repeat;
	padding-right: 2.75rem;
}

.bst-handout select:disabled {
	color: var(--bst-h-line);
	border-bottom-color: var(--bst-h-line);
	cursor: not-allowed;
	background-image:
		linear-gradient(45deg, transparent 50%, var(--bst-h-line) 50%),
		linear-gradient(135deg, var(--bst-h-line) 50%, transparent 50%);
}

.bst-handout .bst-h-setinfo {
	display: none;
	gap: 0.5rem;
	flex-wrap: wrap;
	margin-top: 0.875rem;
	padding-top: 0.875rem;
	border-top: 1px solid var(--bst-h-rule);
}

.bst-handout .bst-h-setinfo.on {
	display: flex;
}

.bst-handout .bst-h-chip {
	border: 1px solid var(--bst-h-line);
	padding: 0.3125rem 0.5625rem;
	font-size: 0.6875rem;
	letter-spacing: 0.1em;
	text-transform: uppercase;
	color: var(--bst-h-graphite);
	font-variant-numeric: tabular-nums;
}

/* ---------- кнопки ---------- */

.bst-handout .bst-h-btn {
	appearance: none;
	display: inline-block;
	border: 1px solid var(--bst-h-ink);
	background: var(--bst-h-ink);
	color: var(--bst-h-paper);
	padding: 0.875rem 1.625rem;
	font-size: 0.875rem;
	font-weight: 600;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	text-decoration: none;
	border-radius: 0;
	cursor: pointer;
	transition: background 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.bst-handout .bst-h-btn:hover {
	background: var(--bst-h-graphite);
	border-color: var(--bst-h-graphite);
	color: var(--bst-h-paper);
}

.bst-handout .bst-h-btn:active {
	transform: translateY(1px);
}

.bst-handout .bst-h-btn[disabled] {
	opacity: 0.55;
	cursor: default;
}

.bst-handout .bst-h-btn.ghost {
	background: transparent;
	color: var(--bst-h-ink);
	border-color: var(--bst-h-line);
}

.bst-handout .bst-h-btn.ghost:hover {
	background: var(--bst-h-wash);
	border-color: var(--bst-h-ink);
	color: var(--bst-h-ink);
}

.bst-handout .bst-h-btn.sm {
	padding: 0.625rem 1rem;
	font-size: 0.75rem;
	letter-spacing: 0.1em;
}

.bst-handout .bst-h-actions {
	display: flex;
	gap: 0.75rem;
	align-items: center;
	flex-wrap: wrap;
	margin-top: 1.75rem;
}

.bst-handout .bst-h-actions .bst-h-note,
.bst-handout .bst-h-allbar .bst-h-note {
	margin: 0;
	flex: 1 1 18rem;
}

/* ---------- анкета ---------- */

.bst-handout .bst-h-qhead {
	display: flex;
	justify-content: space-between;
	align-items: baseline;
	gap: 1rem;
	flex-wrap: wrap;
}

.bst-handout .bst-h-qcount {
	font-size: 0.75rem;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--bst-h-mid);
	font-variant-numeric: tabular-nums;
}

.bst-handout .bst-h-segbar {
	display: flex;
	gap: 0.3125rem;
	margin-top: 1rem;
}

.bst-handout .bst-h-seg {
	height: 3px;
	flex: 1;
	background: var(--bst-h-rule);
}

.bst-handout .bst-h-seg.done {
	background: var(--bst-h-ink);
}

.bst-handout .bst-h-seg.now {
	background: var(--bst-h-graphite);
}

.bst-handout .bst-h-qtext {
	margin: 1.375rem 0 0;
	font-size: clamp(1.3125rem, 3vw, 1.6875rem);
	font-weight: 600;
	letter-spacing: -0.02em;
	line-height: 1.2;
	text-wrap: balance;
}

.bst-handout .bst-h-opts {
	display: grid;
	gap: 0;
	margin-top: 1.5rem;
	border-top: 1px solid var(--bst-h-rule);
}

.bst-handout .bst-h-opt {
	display: flex;
	align-items: center;
	gap: 0.875rem;
	padding: 0.9375rem 0.875rem;
	cursor: pointer;
	border-bottom: 1px solid var(--bst-h-rule);
	transition: background 0.12s ease, padding-left 0.12s ease;
}

.bst-handout .bst-h-opt:hover {
	background: var(--bst-h-wash);
	padding-left: 1.125rem;
}

.bst-handout .bst-h-opt input {
	position: absolute;
	opacity: 0;
	pointer-events: none;
}

.bst-handout .bst-h-mark {
	width: 0.9375rem;
	height: 0.9375rem;
	border: 1px solid var(--bst-h-graphite);
	flex: none;
	position: relative;
}

.bst-handout .bst-h-opt input:checked + .bst-h-mark {
	background: var(--bst-h-ink);
	border-color: var(--bst-h-ink);
}

.bst-handout .bst-h-opt input:checked + .bst-h-mark::after {
	content: "";
	position: absolute;
	inset: 3px;
	border: 1px solid var(--bst-h-paper);
}

.bst-handout .bst-h-opt input:focus-visible + .bst-h-mark {
	outline: 2px solid var(--bst-h-ink);
	outline-offset: 2px;
}

.bst-handout .bst-h-opt-text {
	font-size: 1rem;
}

.bst-handout .bst-h-opt input:checked ~ .bst-h-opt-text {
	font-weight: 600;
}

.bst-handout .multi .bst-h-mark {
	border-radius: 50%;
}

.bst-handout .multi .bst-h-opt input:checked + .bst-h-mark::after {
	inset: 3px;
	border-radius: 50%;
	background: var(--bst-h-paper);
	border: 0;
}

.bst-handout .bst-h-scale {
	display: flex;
	gap: 0.5rem;
	margin-top: 1.5rem;
	flex-wrap: wrap;
}

.bst-handout .bst-h-scale label {
	flex: 1;
	min-width: 3.5rem;
}

.bst-handout .bst-h-scale input {
	position: absolute;
	opacity: 0;
	pointer-events: none;
}

.bst-handout .bst-h-box {
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: 0.25rem;
	padding: 0.875rem 0.375rem;
	border: 1px solid var(--bst-h-line);
	cursor: pointer;
	transition: background 0.12s ease;
}

.bst-handout .bst-h-box:hover {
	background: var(--bst-h-wash);
}

.bst-handout .bst-h-scale input:checked + .bst-h-box {
	background: var(--bst-h-ink);
	color: var(--bst-h-paper);
	border-color: var(--bst-h-ink);
}

.bst-handout .bst-h-num {
	font-size: 1.25rem;
	font-weight: 600;
	font-variant-numeric: tabular-nums;
}

.bst-handout .bst-h-cap {
	font-size: 0.625rem;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--bst-h-mid);
	min-height: 0.875rem;
}

.bst-handout .bst-h-scale input:checked + .bst-h-box .bst-h-cap {
	color: var(--bst-h-paper);
}

/* ---------- файлы ---------- */

.bst-handout .bst-h-filelist {
	margin-top: 1.625rem;
	border-top: 1px solid var(--bst-h-ink);
}

.bst-handout .bst-h-file {
	display: grid;
	grid-template-columns: 3.625rem minmax(0, 1fr) auto;
	gap: 1.125rem;
	align-items: center;
	padding: 1rem 0.25rem;
	border-bottom: 1px solid var(--bst-h-rule);
}

.bst-handout .bst-h-fmt {
	border: 1px solid var(--bst-h-ink);
	font-size: 0.625rem;
	font-weight: 700;
	letter-spacing: 0.1em;
	text-align: center;
	padding: 0.4375rem 0;
}

.bst-handout .bst-h-fname {
	font-size: 1rem;
	font-weight: 600;
	letter-spacing: -0.01em;
}

.bst-handout .bst-h-fmeta {
	margin-top: 0.1875rem;
	font-size: 0.8125rem;
	color: var(--bst-h-mid);
	font-variant-numeric: tabular-nums;
}

.bst-handout .bst-h-allbar {
	display: flex;
	justify-content: space-between;
	align-items: center;
	gap: 1rem;
	flex-wrap: wrap;
	margin-top: 1.5rem;
	padding-top: 1.25rem;
}

.bst-handout .bst-h-allbar[hidden] {
	display: none;
}

.bst-h-toast {
	position: fixed;
	left: 50%;
	bottom: 1.625rem;
	transform: translateX(-50%) translateY(0.875rem);
	background: #0a0a0a;
	color: #fff;
	padding: 0.75rem 1.25rem;
	font-size: 0.8125rem;
	letter-spacing: 0.04em;
	opacity: 0;
	pointer-events: none;
	transition: opacity 0.2s ease, transform 0.2s ease;
	z-index: 20;
	max-width: calc(100% - 2rem);
}

.bst-h-toast.on {
	opacity: 1;
	transform: translateX(-50%) translateY(0);
}

@media (max-width: 38.75rem) {
	.bst-handout .bst-h-file {
		grid-template-columns: 2.875rem minmax(0, 1fr);
		gap: 0.75rem;
	}

	.bst-handout .bst-h-file .dl {
		grid-column: 2;
		justify-self: start;
	}
}