.mq-calc-intro { text-align: center; max-width: 720px; margin: 0 auto; }
.mq-calc-intro p { color: var(--mq-text-dim); }

.mq-calc {
	--zone-low: #e2574c;
	--zone-mid: #4d8fe0;
	--zone-high: #d9a441;
	--calc-danger: #e2574c;

	background: var(--mq-bg-deep);
	color: var(--mq-text);
	font-family: var(--font-mono);
	font-size: 13px;
	line-height: 1.45;
	-webkit-font-smoothing: antialiased;
	border: 1px solid var(--mq-border);
	border-radius: var(--mq-radius);
	padding: 22px 20px 40px;
}
.mq-calc ::selection { background: var(--mq-accent); color: #fff; }

.mq-calc .shell { display: flex; flex-direction: column; gap: 18px; }

.mq-calc .grid-main { display: grid; grid-template-columns: 300px 1fr; gap: 18px; align-items: start; }
@media (max-width: 860px) { .mq-calc .grid-main { grid-template-columns: 1fr; } }
.mq-calc .col-right { display: flex; flex-direction: column; gap: 18px; min-width: 0; }

.mq-calc .panel { background: var(--mq-bg); border: 1px solid var(--mq-border); border-radius: 2px; }
.mq-calc .panel-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 10px 14px; border-bottom: 1px solid var(--mq-border-soft); background: var(--mq-surface); }
.mq-calc .panel-head h2 { margin: 0; font-family: var(--font-mono); font-size: 10.5px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--mq-text-dim); }
.mq-calc .panel-body { padding: 14px; }

.mq-calc .field { display: flex; flex-direction: column; gap: 5px; margin-bottom: 14px; }
.mq-calc .field:last-child { margin-bottom: 0; }
.mq-calc .field-label { display: flex; align-items: center; gap: 5px; font-size: 10.5px; letter-spacing: .09em; text-transform: uppercase; color: var(--mq-text-dim); }
.mq-calc .field-label .unit { color: var(--mq-text-faint); text-transform: none; letter-spacing: 0; }

.mq-calc input[type="number"] {
	width: 100%;
	background: var(--mq-bg-deep);
	border: 1px solid var(--mq-border);
	border-radius: 2px;
	color: var(--mq-text);
	font-family: var(--font-mono);
	font-variant-numeric: tabular-nums;
	font-size: 14px;
	padding: 8px 9px;
	outline: none;
}
.mq-calc input[type="number"]:focus { border-color: var(--mq-accent-bright); box-shadow: 0 0 0 1px var(--mq-accent-bright) inset, 0 0 8px rgba(77,143,224,.25); }
.mq-calc input[type="number"].invalid { border-color: var(--calc-danger); box-shadow: 0 0 0 1px var(--calc-danger) inset; }

.mq-calc .field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

.mq-calc .info { position: relative; display: inline-flex; }
.mq-calc .info button { all: unset; width: 14px; height: 14px; border-radius: 50%; border: 1px solid var(--mq-text-faint); color: var(--mq-text-faint); font-size: 9.5px; line-height: 1; display: flex; align-items: center; justify-content: center; cursor: help; }
.mq-calc .info button:focus-visible { outline: 2px solid var(--mq-accent-bright); outline-offset: 2px; }
.mq-calc .info .tip { position: absolute; bottom: calc(100% + 8px); left: 50%; transform: translateX(-50%); width: 220px; background: var(--mq-surface); border: 1px solid var(--mq-border); border-radius: 3px; padding: 9px 10px; font-family: var(--font-body); font-size: 11.5px; line-height: 1.5; color: var(--mq-text-dim); opacity: 0; visibility: hidden; transition: opacity .12s ease; z-index: 5; pointer-events: none; }
.mq-calc .info:hover .tip, .mq-calc .info button:focus-visible ~ .tip { opacity: 1; visibility: visible; }

.mq-calc .warn { display: none; font-family: var(--font-body); font-size: 11.5px; color: var(--calc-danger); margin-top: 10px; padding-top: 10px; border-top: 1px solid var(--mq-border-soft); }
.mq-calc .warn.show { display: block; }

.mq-calc .cards-prob { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
@media (max-width: 640px) { .mq-calc .cards-prob { grid-template-columns: 1fr; } }

.mq-calc .prob-card { background: var(--mq-bg); border: 1px solid var(--mq-border); border-top: 3px solid var(--zone-c, var(--mq-accent-bright)); border-radius: 2px; padding: 14px 16px 16px; }
.mq-calc .prob-card.low { --zone-c: var(--zone-low); }
.mq-calc .prob-card.mid { --zone-c: var(--zone-mid); }
.mq-calc .prob-card.high { --zone-c: var(--zone-high); }
.mq-calc .prob-label { font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase; color: var(--mq-text-dim); margin-bottom: 8px; }
.mq-calc .prob-value { font-size: 33px; font-weight: 700; font-variant-numeric: tabular-nums; color: var(--mq-text); line-height: 1; }
.mq-calc .prob-range { margin-top: 8px; font-size: 11.5px; color: var(--mq-text-faint); font-variant-numeric: tabular-nums; }

.mq-calc .chart-wrap { position: relative; width: 100%; }
.mq-calc canvas#curve { display: block; width: 100%; height: 230px; }

.mq-calc table.ladder { width: 100%; border-collapse: collapse; }
.mq-calc table.ladder th, .mq-calc table.ladder td { text-align: center; padding: 9px 4px; font-variant-numeric: tabular-nums; white-space: nowrap; }
.mq-calc table.ladder thead th { font-size: 10px; letter-spacing: .08em; text-transform: uppercase; color: var(--mq-text-dim); font-weight: 600; border-bottom: 1px solid var(--mq-border-soft); }
.mq-calc table.ladder tbody td { font-size: 13px; color: var(--mq-text); }
.mq-calc table.ladder td.center-col { background: rgba(77,143,224,.10); border-left: 1px solid var(--mq-border); border-right: 1px solid var(--mq-border); font-weight: 700; color: var(--mq-accent-bright); }
.mq-calc .ladder-scroll { overflow-x: auto; }

.mq-calc .disclaimer { font-family: var(--font-body); font-size: 11px; line-height: 1.6; color: var(--mq-text-faint); border-top: 1px solid var(--mq-border-soft); padding-top: 16px; }
.mq-calc .disclaimer strong { color: var(--mq-text-dim); }