/* Ratio Calculators – Core Ratio Math */
.rcc, .rcc-hub {
	--rcc-bg: #f6f1e7;
	--rcc-card: #fffdf8;
	--rcc-line: #ddd5c8;
	--rcc-ink: #1f1d1a;
	--rcc-muted: #6b665e;
	--rcc-accent: #a33a2a;
	--rcc-ok: #2f7a46;
	--rcc-serif: Georgia, "Times New Roman", serif;
	color: var(--rcc-ink);
	box-sizing: border-box;
}
.rcc *, .rcc-hub * { box-sizing: border-box; }
.rcc { margin: 24px 0; }
.rcc-loading { color: var(--rcc-muted); }

.rcc-card { background: var(--rcc-card); border: 1px solid var(--rcc-line); border-radius: 14px; padding: 28px; }
.rcc-head { border-bottom: 1px solid var(--rcc-ink); padding-bottom: 14px; margin-bottom: 20px; }
.rcc .rcc-title { font-family: var(--rcc-serif); font-size: 28px; margin: 0 0 6px; line-height: 1.2; color: var(--rcc-ink); }
.rcc .rcc-desc { margin: 0; color: var(--rcc-muted); }

.rcc-tabs { display: flex; border: 1px solid var(--rcc-line); border-radius: 10px; overflow: hidden; margin-bottom: 14px; }
.rcc .rcc-tab { flex: 1; background: #fff; border: 0; border-right: 1px solid var(--rcc-line); padding: 11px 8px; font-size: 15px; color: var(--rcc-ink); cursor: pointer; border-radius: 0; }
.rcc .rcc-tab:last-child { border-right: 0; }
.rcc .rcc-tab.is-active { background: #e4e6ec; font-weight: 600; }
.rcc-hint { color: var(--rcc-muted); font-size: 14px; margin: 0 0 12px; }

.rcc-ratio-row { display: flex; align-items: flex-end; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.rcc-ratio-row .rcc-field { flex: 1 1 90px; }
.rcc-colon, .rcc-eq { font-family: var(--rcc-serif); font-size: 26px; padding-bottom: 8px; color: var(--rcc-muted); }
.rcc-grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; margin-bottom: 14px; }
.rcc-field { display: flex; flex-direction: column; gap: 6px; margin: 0; }
.rcc-field span { font-size: 13px; font-weight: 600; color: var(--rcc-muted); }
.rcc .rcc-field input { width: 100%; padding: 12px 14px; font-size: 18px; border: 1px solid var(--rcc-line); border-radius: 10px; background: #fff; color: var(--rcc-ink); margin: 0; }
.rcc .rcc-field input:focus { outline: 2px solid var(--rcc-accent); outline-offset: 1px; border-color: transparent; }

.rcc-field.is-active span { color: var(--rcc-accent); }
.rcc .rcc-field.is-active input { border-color: var(--rcc-accent); box-shadow: 0 0 0 1px var(--rcc-accent); }

/* Keypad */
.rcc-keypad { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; max-width: 460px; margin: 4px 0 18px; padding: 12px; background: #faf7f1; border: 1px solid var(--rcc-line); border-radius: 12px; }
.rcc .rcc-key { background: #fff; color: var(--rcc-ink); border: 1px solid var(--rcc-line); border-radius: 10px; padding: 12px 0; font-size: 18px; font-weight: 500; line-height: 1; cursor: pointer; user-select: none; -webkit-tap-highlight-color: transparent; margin: 0; }
.rcc .rcc-key:hover { background: #f1ede5; }
.rcc .rcc-key:active { transform: translateY(1px); }
.rcc .rcc-key-fn { background: #eef0f4; font-size: 16px; }
.rcc .rcc-key-wide { grid-column: span 3; }
.rcc .rcc-key-eq { background: var(--rcc-ink); color: #fff; border-color: var(--rcc-ink); font-size: 20px; }
.rcc .rcc-key-eq:hover { background: #3a3632; }

.rcc-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.rcc .rcc-btn { background: var(--rcc-ink); color: #fff; border: 1px solid var(--rcc-ink); border-radius: 999px; padding: 12px 28px; font-size: 16px; font-weight: 600; cursor: pointer; line-height: 1.2; }
.rcc .rcc-btn:hover { background: #3a3632; }
.rcc .rcc-btn-ghost { background: transparent; color: var(--rcc-ink); }
.rcc .rcc-btn-ghost:hover { background: var(--rcc-bg); }

.rcc-output:empty { display: none; }
.rcc-output { margin-top: 22px; }
.rcc-result { background: var(--rcc-bg); border-radius: 12px; padding: 18px 20px; }
.rcc-result p { margin: 8px 0 0; }
.rcc-big { font-family: var(--rcc-serif); font-size: 30px; font-weight: 700; line-height: 1.2; }
.rcc-ok { color: var(--rcc-ok); }
.rcc-no { color: var(--rcc-accent); }
.rcc-label { font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--rcc-muted); font-weight: 700; }
.rcc-split { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; }
.rcc-note { font-size: 14px; color: var(--rcc-muted); border-top: 1px solid var(--rcc-line); padding-top: 10px; margin-top: 12px !important; }
.rcc-error { background: #fbeceb; color: var(--rcc-accent); border: 1px solid #efc9c4; border-radius: 10px; padding: 12px 16px; }

.rcc-steps { margin-top: 16px; }
.rcc .rcc-steps h3 { font-family: var(--rcc-serif); font-size: 20px; margin: 0 0 8px; }
.rcc-steps ol { margin: 0; padding-left: 22px; }
.rcc-steps li { margin: 6px 0; line-height: 1.55; }

.rcc-table-wrap { overflow-x: auto; margin: 16px 0 12px; border: 1px solid var(--rcc-line); border-radius: 10px; }
.rcc-table { width: 100%; border-collapse: collapse; margin: 0; }
.rcc-table th, .rcc-table td { padding: 9px 14px; text-align: left; border-bottom: 1px solid var(--rcc-line); border-left: 0; border-right: 0; border-top: 0; }
.rcc-table th { background: var(--rcc-bg); font-size: 13px; }
.rcc-table tr:last-child td { border-bottom: 0; }

/* Batch 2: units, selects, file picker, visuals */
.rcc-unit-row { display: flex; gap: 8px; }
.rcc .rcc-unit-row input { flex: 1 1 auto; min-width: 0; }
.rcc .rcc-unit-row select, .rcc .rcc-select select { padding: 12px 10px; font-size: 16px; border: 1px solid var(--rcc-line); border-radius: 10px; background: #fff; color: var(--rcc-ink); margin: 0; height: auto; }
.rcc .rcc-unit-row select { flex: 0 0 82px; }
.rcc .rcc-select select { width: 100%; }
.rcc-block { margin-bottom: 14px; }
.rcc [hidden] { display: none !important; }
.rcc-file { display: inline-flex; align-items: center; gap: 10px; cursor: pointer; }
.rcc .rcc-file input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.rcc-file span { display: inline-block; padding: 14px 26px; border: 2px dashed var(--rcc-line); border-radius: 12px; background: #fff; font-weight: 600; }
.rcc-file:hover span, .rcc-file input:focus + span { border-color: var(--rcc-accent); }
.rcc-file-name { color: var(--rcc-muted); font-size: 14px; margin: 8px 0 0; }
.rcc-svg { display: block; width: 100%; height: auto; margin-top: 16px; font-family: inherit; }
.rcc-ar-wrap { display: grid; grid-template-columns: 1fr 240px; gap: 16px; align-items: center; }
.rcc-ar-wrap .rcc-svg { margin-top: 0; }
@media (max-width: 600px) { .rcc-ar-wrap { grid-template-columns: 1fr; } .rcc-ar-wrap .rcc-svg { max-width: 240px; } }

/* All-in-one tabs */
.rcc-switch { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--rcc-line); border-radius: 12px; overflow: hidden; margin-bottom: 14px; background: #fff; }
.rcc .rcc-switch-tab { background: #fff; border: 0; border-right: 1px solid var(--rcc-line); border-radius: 0; padding: 14px 6px; font-size: 15px; color: var(--rcc-ink); cursor: pointer; margin: 0; line-height: 1.25; }
.rcc .rcc-switch-tab:last-child { border-right: 0; }
.rcc .rcc-switch-tab:hover { background: #f4f1ea; }
.rcc .rcc-switch-tab.is-active { background: #e4e6ec; font-weight: 700; }
.rcc-panel[hidden] { display: none; }
@media (max-width: 600px) {
	.rcc-switch { grid-template-columns: repeat(2, 1fr); }
	.rcc .rcc-switch-tab:nth-child(2) { border-right: 0; }
	.rcc .rcc-switch-tab:nth-child(-n+2) { border-bottom: 1px solid var(--rcc-line); }
}

/* Hub */
.rcc-hub { margin: 32px 0; }
.rcc-hub-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; border-bottom: 1px solid var(--rcc-ink); padding-bottom: 14px; margin-bottom: 18px; }
.rcc-hub .rcc-hub-head h2 { font-family: var(--rcc-serif); font-size: 34px; margin: 0 0 6px; }
.rcc-hub-head p { margin: 0; color: var(--rcc-muted); max-width: 640px; }
.rcc-hub-count { font-weight: 700; font-size: 13px; white-space: nowrap; }
.rcc-hub-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.rcc-hub .rcc-hub-card { display: flex; flex-direction: column; background: var(--rcc-card); border: 1px solid var(--rcc-line); padding: 24px; text-decoration: none; color: var(--rcc-ink); transition: border-color .15s; }
.rcc-hub .rcc-hub-card:hover { border-color: var(--rcc-ink); }
.rcc-hub-num { color: var(--rcc-accent); font-size: 12px; font-weight: 700; margin-bottom: 14px; }
.rcc-hub .rcc-hub-card h3 { font-family: var(--rcc-serif); font-size: 24px; margin: 0 0 10px; line-height: 1.15; color: var(--rcc-ink); }
.rcc-hub-card p { color: var(--rcc-muted); margin: 0 0 16px; flex: 1; }
.rcc-hub-link { font-weight: 700; font-size: 14px; }

@media (max-width: 600px) {
	.rcc-card { padding: 18px 16px; }
	.rcc .rcc-title { font-size: 23px; }
	.rcc-big { font-size: 25px; }
	.rcc-colon, .rcc-eq { font-size: 20px; }
	.rcc-ratio-row .rcc-field { flex-basis: 60px; }
}