/*!
 * @Rank – CSS Grid & Flexbox Builder: the tool's own rules.
 *
 * The palette, header, cards, buttons, notices and toast all come from
 * assets/css/atrank-core.css. Only what is specific to this tool is here, and
 * every rule is anchored on .atrank-gfb.
 *
 * .atrank-gfb-preview carries NO layout rules of its own beyond a border and
 * padding — display:grid/flex, gap, alignment and every track size are all
 * set by the script, as inline styles, from the exact same declaration list
 * the CSS output panel prints as text. See the banner in atrank-gfb.js.
 */

.atrank-gfb .atrank-gfb-panes {
	display: grid;
	grid-template-columns: 1fr;
	gap: 10px;
	align-items: start;
}
@media (min-width: 900px) {
	.atrank-gfb .atrank-gfb-panes {
		grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
	}
}
.atrank-gfb .atrank-gfb-col {
	display: grid;
	gap: 10px;
	min-width: 0;
	align-content: start;
}

/* ── Mode tabs (header) ───────────────────────────────────────────────── */
.atrank-gfb .atrank-gfb-modetabs {
	display: flex;
	gap: 4px;
}
.atrank-gfb .atrank-gfb-modetab {
	appearance: none;
	border: 1px solid transparent;
	background: transparent;
	color: var(--muted);
	font: inherit;
	font-size: 12.5px;
	font-weight: 700;
	padding: 5px 12px;
	border-radius: var(--r);
	cursor: pointer;
	transition: color 0.18s var(--ease), background 0.18s var(--ease), border-color 0.18s var(--ease);
}
.atrank-gfb .atrank-gfb-modetab:hover {
	color: var(--accent);
	background: var(--hover);
}
.atrank-gfb .atrank-gfb-modetab.is-on {
	color: var(--on-accent);
	background: var(--accent);
	border-color: var(--accent);
}
.atrank-gfb .atrank-gfb-modetab:focus-visible {
	outline: none;
	box-shadow: var(--ring);
}

/* ── Fields ───────────────────────────────────────────────────────────── */
.atrank-gfb .atrank-gfb-field {
	display: block;
	margin-top: 10px;
}
.atrank-gfb .atrank-cardhead + .atrank-gfb-field,
.atrank-gfb .atrank-gfb-field:first-child {
	margin-top: 0;
}
.atrank-gfb .atrank-gfb-label {
	display: block;
	margin-bottom: 4px;
	font-size: 11.5px;
	font-weight: 600;
	color: var(--muted);
}
.atrank-gfb .atrank-gfb-row2 {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 10px;
	margin-top: 10px;
}
.atrank-gfb .atrank-gfb-row2 .atrank-gfb-field {
	margin-top: 0;
}
.atrank-gfb .atrank-gfb-text,
.atrank-gfb .atrank-gfb-number,
.atrank-gfb .atrank-gfb-select {
	display: block;
	width: 100%;
	min-width: 0;
	font: inherit;
	font-size: 13px;
	color: var(--txt);
	padding: 6px 9px;
	border: 1px solid var(--line2);
	border-radius: var(--r);
	background: var(--panel);
	box-shadow: var(--field-inset);
}
.atrank-gfb .atrank-gfb-number {
	width: 100%;
}
.atrank-gfb .atrank-gfb-text:focus-visible,
.atrank-gfb .atrank-gfb-number:focus-visible,
.atrank-gfb .atrank-gfb-select:focus-visible {
	outline: none;
	box-shadow: var(--ring);
}
.atrank-gfb .atrank-gfb-inline {
	display: flex;
	align-items: center;
	gap: 6px;
}
.atrank-gfb .atrank-gfb-inline .atrank-gfb-number {
	width: 7em;
}

.atrank-gfb .atrank-gfb-check {
	display: flex;
	align-items: center;
	gap: 7px;
	font-size: 12.5px;
	color: var(--muted);
	cursor: pointer;
	margin-top: 10px;
}
.atrank-gfb .atrank-gfb-check:first-child {
	margin-top: 0;
}
.atrank-gfb .atrank-gfb-check input {
	width: 15px;
	height: 15px;
	accent-color: var(--accent);
	flex-shrink: 0;
}

/* ── Track lists (grid columns / rows) ───────────────────────────────── */
.atrank-gfb .atrank-gfb-tracks {
	display: flex;
	flex-wrap: wrap;
	gap: 5px;
}
.atrank-gfb .atrank-gfb-track {
	display: flex;
	align-items: center;
	gap: 2px;
}
.atrank-gfb .atrank-gfb-trackinput {
	width: 6.5em;
	font: inherit;
	font-family: var(--mono);
	font-size: 12px;
	color: var(--txt);
	padding: 5px 7px;
	border: 1px solid var(--line2);
	border-radius: var(--r);
	background: var(--panel);
	box-shadow: var(--field-inset);
}
.atrank-gfb .atrank-gfb-trackinput:focus-visible {
	outline: none;
	box-shadow: var(--ring);
}
.atrank-gfb .atrank-gfb-trackremove {
	appearance: none;
	border: none;
	background: transparent;
	color: var(--dim);
	width: 20px;
	height: 20px;
	border-radius: var(--r);
	cursor: pointer;
	font-size: 13px;
	line-height: 1;
}
.atrank-gfb .atrank-gfb-trackremove:hover:not(:disabled) {
	color: var(--err);
	background: var(--hover);
}
.atrank-gfb .atrank-gfb-trackremove:disabled {
	opacity: 0.3;
	cursor: not-allowed;
}
.atrank-gfb .atrank-gfb-addtrack {
	margin-top: 6px;
	font-size: 11.5px;
	padding: 4px 10px;
}

/* ── Items ────────────────────────────────────────────────────────────── */
.atrank-gfb .atrank-gfb-itemstepper {
	display: flex;
	align-items: center;
	gap: 6px;
}
.atrank-gfb .atrank-gfb-itemstepper .atrank-btn {
	width: 26px;
	height: 26px;
	padding: 0;
	justify-content: center;
}
.atrank-gfb .atrank-gfb-itemcount {
	min-width: 1.4em;
	text-align: center;
	font-family: var(--mono);
	font-size: 13px;
	font-weight: 700;
	color: var(--txt);
	font-variant-numeric: tabular-nums;
}
.atrank-gfb .atrank-gfb-itempanel {
	margin-top: 10px;
	padding-top: 10px;
	border-top: 1px solid var(--line);
}
.atrank-gfb .atrank-gfb-itempanelhead {
	margin-bottom: 8px;
}
.atrank-gfb .atrank-gfb-itempanelhead strong {
	font-size: 12.5px;
	color: var(--accent);
}

/* ── Responsive ───────────────────────────────────────────────────────── */
.atrank-gfb .atrank-gfb-respopts {
	margin-top: 10px;
	padding-top: 10px;
	border-top: 1px solid var(--line);
	display: grid;
	gap: 4px;
}

/* ── The preview ──────────────────────────────────────────────────────── */
.atrank-gfb .atrank-gfb-preview {
	min-height: 160px;
	padding: 10px;
	border: 1px dashed var(--line2);
	border-radius: var(--r);
	background: var(--inset);
}
.atrank-gfb .atrank-gfb-cell {
	display: flex;
	align-items: center;
	justify-content: center;
	min-height: 44px;
	padding: 8px;
	border: 1px solid var(--line2);
	border-radius: var(--r);
	background: var(--panel);
	color: var(--muted);
	font-size: 12px;
	font-weight: 700;
	font-variant-numeric: tabular-nums;
	cursor: pointer;
	user-select: none;
	transition: border-color 0.15s var(--ease), background 0.15s var(--ease), color 0.15s var(--ease);
}
.atrank-gfb .atrank-gfb-cell:hover {
	border-color: var(--accent);
	color: var(--accent);
}
.atrank-gfb .atrank-gfb-cell.is-selected {
	border-color: var(--accent);
	border-style: solid;
	border-width: 2px;
	background: var(--accent-soft);
	color: var(--accent);
}

/* ── Output tabs + code ───────────────────────────────────────────────── */
.atrank-gfb .atrank-gfb-outtabs {
	display: flex;
	gap: 4px;
	margin-bottom: 8px;
}
.atrank-gfb .atrank-gfb-outtab {
	appearance: none;
	border: 1px solid var(--line2);
	background: transparent;
	color: var(--muted);
	font: inherit;
	font-size: 12px;
	font-weight: 600;
	padding: 5px 11px;
	border-radius: var(--r);
	cursor: pointer;
	transition: color 0.18s var(--ease), background 0.18s var(--ease), border-color 0.18s var(--ease);
}
.atrank-gfb .atrank-gfb-outtab:hover {
	color: var(--accent);
	border-color: var(--accent);
}
.atrank-gfb .atrank-gfb-outtab.is-on {
	color: var(--on-accent);
	background: var(--accent);
	border-color: var(--accent);
}
.atrank-gfb .atrank-gfb-outtab:focus-visible {
	outline: none;
	box-shadow: var(--ring);
}
.atrank-gfb .atrank-gfb-code {
	margin: 0;
	padding: 9px 11px;
	border: 1px solid var(--line);
	border-radius: var(--r);
	background: var(--inset);
	color: var(--txt);
	font-family: var(--mono);
	font-size: 12px;
	line-height: 1.55;
	white-space: pre;
	overflow-x: auto;
	min-height: 2.4em;
	max-height: 46vh;
	overflow-y: auto;
}

/* ── Narrow ───────────────────────────────────────────────────────────── */
@media (max-width: 560px) {
	.atrank-gfb .atrank-gfb-row2 {
		grid-template-columns: 1fr;
	}
}