/* =======================================================================
   CGG-EDI Educational Calculator - Phase W4
   Loaded ONLY on /edi-calculator/. Uses the existing theme design tokens
   (dark navy foundation, warm gold highlights, ivory headings). No new
   fonts, no external assets, restrained motion only.
   ======================================================================= */

.cggedi-calc-page {
	max-width: 68rem;
}

/* --- On this page ---------------------------------------------------- */
.cggedi-calc-toc {
	margin: 1.5rem 0 2.5rem;
	padding: 1rem 1.15rem;
	border: 1px solid var(--cggedi-line);
	border-radius: var(--cggedi-radius);
	background-color: var(--cggedi-bg-elev);
}
.cggedi-calc-toc-title {
	font-size: 0.72rem;
	text-transform: uppercase;
	letter-spacing: 0.12em;
	color: var(--cggedi-ink-faint);
	margin: 0 0 0.6rem;
}
.cggedi-calc-toc ul {
	list-style: none;
	margin: 0;
	padding: 0;
	display: grid;
	gap: 0.4rem;
}
.cggedi-calc-toc a {
	color: var(--cggedi-ink-dim);
}

/* --- Notices ------------------------------------------------------------ */
.cggedi-calc-notice {
	margin: 1.25rem 0;
	padding: 0.9rem 1.1rem;
	border: 1px solid var(--cggedi-line-strong);
	border-left: 3px solid var(--cggedi-gold);
	border-radius: var(--cggedi-radius-sm);
	background-color: var(--cggedi-bg-elev);
}
.cggedi-calc-notice p {
	margin: 0 0 0.5rem;
	color: var(--cggedi-ink-dim);
	font-size: 0.95rem;
}
.cggedi-calc-notice p:last-child { margin-bottom: 0; }
.cggedi-calc-notice--spreadsheet {
	border-left-color: var(--cggedi-gold-bright);
}

/* --- App: guide + main columns ------------------------------------------ */
.cggedi-calc {
	margin-top: 1.5rem;
	scroll-margin-top: 5.5rem;
}
.cggedi-calc-layout {
	display: grid;
	grid-template-columns: minmax(0, 1fr);
	gap: 1.75rem;
	align-items: start;
}
/* Grid/flex items default to min-width:auto; without this the wide
   spreadsheet's min-width propagates up and the scroll region expands
   past the viewport instead of scrolling inside itself. */
.cggedi-calc-layout > *,
.cggedi-calc-main {
	min-width: 0;
}
.cggedi-calc-cadence {
	border: 1px solid var(--cggedi-line);
	border-radius: var(--cggedi-radius);
	padding: 1.25rem;
	background-color: var(--cggedi-bg-elev);
	text-align: center;
}
.cggedi-calc-portrait {
	display: block;
	width: 100%;
	max-width: 14rem;
	height: auto;
	margin: 0 auto 0.75rem;
	aspect-ratio: 1230 / 1278;
	object-fit: contain;
	background: transparent;
}
.cggedi-calc-cadence-name {
	font-family: var(--cggedi-font-serif);
	color: var(--cggedi-ink);
	font-size: 0.95rem;
	margin: 0 0 0.5rem;
}
.cggedi-calc-guidance,
.cggedi-calc-guidance-results {
	color: var(--cggedi-ink-dim);
	font-size: 0.95rem;
	margin: 0;
}

/* --- Progress + step list --------------------------------------------- */
.cggedi-calc-progress {
	font-weight: 600;
	color: var(--cggedi-gold-bright);
	margin: 0 0 0.75rem;
}
.cggedi-calc-steps {
	list-style: none;
	margin: 0 0 1.5rem;
	padding: 0;
	display: flex;
	flex-wrap: wrap;
	gap: 0.5rem;
}
.cggedi-calc-steps-item {
	display: flex;
	align-items: center;
	gap: 0.5rem;
	padding: 0.4rem 0.7rem;
	border: 1px solid var(--cggedi-line);
	border-radius: 999px;
	font-size: 0.82rem;
	color: var(--cggedi-ink-faint);
}
.cggedi-calc-steps-item.is-active {
	border-color: var(--cggedi-gold);
	color: var(--cggedi-ink);
}
.cggedi-calc-steps-item.is-done {
	color: var(--cggedi-ink-dim);
}
.cggedi-calc-steps-num {
	display: inline-grid;
	place-items: center;
	width: 1.3rem;
	height: 1.3rem;
	border-radius: 50%;
	border: 1px solid currentColor;
	font-size: 0.72rem;
}

/* --- Form ------------------------------------------------------------- */
.cggedi-calc-step-heading {
	font-family: var(--cggedi-font-serif);
	font-size: clamp(1.15rem, 1rem + 0.8vw, 1.4rem);
	margin: 0 0 0.75rem;
}
.cggedi-calc-step-heading:focus { outline: none; }
.cggedi-calc-step-heading:focus-visible {
	outline: 3px solid var(--cggedi-focus);
	outline-offset: 3px;
}
.cggedi-calc-field { margin-bottom: 1rem; }
.cggedi-calc-field label {
	display: block;
	margin-bottom: 0.35rem;
	color: var(--cggedi-ink);
	font-size: 0.92rem;
}
.cggedi-calc-field input[type="number"] {
	width: 100%;
	max-width: 18rem;
	padding: 0.55rem 0.7rem;
	font: inherit;
	color: var(--cggedi-ink);
	background-color: var(--cggedi-bg-elev-2);
	border: 1px solid var(--cggedi-line-strong);
	border-radius: var(--cggedi-radius-sm);
	-webkit-appearance: none;
	appearance: none;
}
.cggedi-calc-help {
	margin: 0.4rem 0 0;
	color: var(--cggedi-ink-faint);
	font-size: 0.85rem;
	max-width: 60ch;
}
.cggedi-calc-fieldset {
	border: 1px solid var(--cggedi-line);
	border-radius: var(--cggedi-radius-sm);
	padding: 1rem 1.1rem;
	margin: 0 0 1rem;
}
.cggedi-calc-fieldset legend {
	padding: 0 0.4rem;
	color: var(--cggedi-ink);
	font-size: 0.9rem;
	font-weight: 600;
}
.cggedi-calc-field-row {
	display: flex;
	flex-wrap: wrap;
	gap: 1rem;
	align-items: flex-end;
}
.cggedi-calc-field-row .cggedi-calc-field { margin-bottom: 0; flex: 1 1 8rem; }
.cggedi-calc-field-row .cggedi-calc-field input { max-width: 100%; }
.cggedi-calc-check {
	display: inline-flex;
	align-items: center;
	gap: 0.45rem;
	margin: 0 0.9rem 0.5rem 0;
	color: var(--cggedi-ink-dim);
	font-size: 0.9rem;
}
.cggedi-calc-check input { width: 1.05rem; height: 1.05rem; }

.cggedi-calc-summary {
	color: var(--cggedi-ink-dim);
	max-width: 66ch;
}
.cggedi-calc-advanced {
	border: 1px solid var(--cggedi-line);
	border-radius: var(--cggedi-radius-sm);
	padding: 0.4rem 1rem 1rem;
	margin: 1.25rem 0;
	background-color: var(--cggedi-bg-elev);
}
.cggedi-calc-advanced > summary {
	cursor: pointer;
	padding: 0.6rem 0;
	color: var(--cggedi-ink);
	font-weight: 600;
}
.cggedi-calc-schedule {
	list-style: none;
	margin: 0.75rem 0 0;
	padding: 0;
	display: grid;
	gap: 0.4rem;
}
.cggedi-calc-schedule li {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 0.6rem;
	color: var(--cggedi-ink-dim);
	font-size: 0.9rem;
}
.cggedi-calc-schedule-empty { color: var(--cggedi-ink-faint); }

.cggedi-calc-error {
	margin: 1rem 0;
	padding: 0.8rem 1rem;
	border: 1px solid var(--cggedi-danger);
	border-left: 3px solid var(--cggedi-danger);
	border-radius: var(--cggedi-radius-sm);
	color: var(--cggedi-ink);
	background-color: rgba(217, 140, 140, 0.08);
}
.cggedi-calc-noscript {
	margin: 1rem 0 0;
	color: var(--cggedi-ink-faint);
	font-size: 0.9rem;
}

/* --- Buttons -------------------------------------------------------------- */
.cggedi-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 0.4rem;
	padding: 0.6rem 1.1rem;
	font: inherit;
	font-weight: 600;
	font-size: 0.92rem;
	color: var(--cggedi-ink);
	background-color: var(--cggedi-bg-elev-2);
	border: 1px solid var(--cggedi-line-strong);
	border-radius: var(--cggedi-radius-sm);
	cursor: pointer;
	-webkit-appearance: none;
	appearance: none;
	transition: background-color var(--cggedi-transition), color var(--cggedi-transition), border-color var(--cggedi-transition);
}
.cggedi-btn:hover { border-color: var(--cggedi-gold-deep); }
.cggedi-btn--ghost { background-color: transparent; }
.cggedi-btn--gold {
	color: var(--cggedi-bg);
	background-color: var(--cggedi-gold);
	border-color: var(--cggedi-gold);
}
.cggedi-btn--gold:hover { background-color: var(--cggedi-gold-bright); border-color: var(--cggedi-gold-bright); }
.cggedi-btn--small { padding: 0.3rem 0.7rem; font-size: 0.8rem; }
.cggedi-btn[disabled] { opacity: 0.5; cursor: not-allowed; }

.cggedi-calc-controls {
	display: flex;
	flex-wrap: wrap;
	gap: 0.75rem;
	margin-top: 1.75rem;
	padding-top: 1.25rem;
	border-top: 1px solid var(--cggedi-line);
}

/* --- Results --------------------------------------------------------------- */
.cggedi-calc-results {
	margin-top: 2.5rem;
	padding-top: 2rem;
	border-top: 1px solid var(--cggedi-line-strong);
}
.cggedi-calc-results-nav {
	display: flex;
	flex-wrap: wrap;
	gap: 0.75rem 1.25rem;
	align-items: center;
	margin: 1rem 0 1.5rem;
	font-size: 0.9rem;
}
.cggedi-calc-results-summary {
	margin-bottom: 1.25rem;
	color: var(--cggedi-ink-dim);
	max-width: 70ch;
}
.cggedi-calc-results-summary p { margin: 0 0 0.75rem; }
.cggedi-calc-results-summary p:last-child { margin-bottom: 0; }

/* Spreadsheet: its own scroll region - never causes page-level overflow */
.cggedi-calc-spreadsheet-scroll {
	max-width: 100%;
	overflow: auto;
	max-height: 32rem;
	border: 1px solid var(--cggedi-line-strong);
	border-radius: var(--cggedi-radius-sm);
	background-color: var(--cggedi-bg-elev);
	overscroll-behavior: contain;
}
.cggedi-calc-spreadsheet-scroll:focus-visible {
	outline: 3px solid var(--cggedi-focus);
	outline-offset: 2px;
}
.cggedi-calc-spreadsheet {
	border-collapse: collapse;
	min-width: 62rem;
	width: 100%;
	font-size: 0.85rem;
}
.cggedi-calc-spreadsheet caption {
	text-align: left;
	padding: 0.75rem 0.85rem;
	color: var(--cggedi-ink-faint);
	font-size: 0.82rem;
}
.cggedi-calc-spreadsheet th,
.cggedi-calc-spreadsheet td {
	padding: 0.5rem 0.7rem;
	text-align: right;
	white-space: nowrap;
	border-bottom: 1px solid var(--cggedi-line);
}
.cggedi-calc-spreadsheet thead th {
	position: sticky;
	top: 0;
	z-index: 1;
	text-align: right;
	color: var(--cggedi-ink);
	background-color: var(--cggedi-bg-elev-2);
	border-bottom: 1px solid var(--cggedi-line-strong);
	font-size: 0.78rem;
	vertical-align: bottom;
}
.cggedi-calc-spreadsheet th[scope="col"]:first-child,
.cggedi-calc-spreadsheet th[scope="col"]:nth-child(2),
.cggedi-calc-spreadsheet td:first-child,
.cggedi-calc-spreadsheet td:nth-child(2) {
	text-align: left;
}
.cggedi-calc-spreadsheet tbody tr:nth-child(odd) {
	background-color: rgba(244, 239, 228, 0.02);
}

.cggedi-calc-pagination {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 0.75rem 1rem;
	margin-top: 1rem;
}
.cggedi-calc-pagination-status {
	color: var(--cggedi-ink-faint);
	font-size: 0.85rem;
}

/* --- Educational copy -------------------------------------------------- */
.cggedi-calc-education {
	margin-top: 3rem;
}
.cggedi-calc-edu-section {
	margin-top: 2.5rem;
	padding-top: 2rem;
	border-top: 1px solid var(--cggedi-line);
}
.cggedi-calc-edu-section:first-child { margin-top: 0; padding-top: 0; border-top: none; }
.cggedi-calc-edu-section p { max-width: 70ch; color: var(--cggedi-ink-dim); }
.cggedi-calc-edu-subheading {
	font-family: var(--cggedi-font-serif);
	font-size: 1.1rem;
	margin: 1.5rem 0 0.5rem;
	color: var(--cggedi-ink);
}
.cggedi-calc-list {
	max-width: 70ch;
	color: var(--cggedi-ink-dim);
	padding-left: 1.25rem;
}
.cggedi-calc-list li { margin-bottom: 0.4rem; }
.cggedi-calc-formula {
	font-family: var(--cggedi-font-serif);
	font-size: 1.15rem;
	color: var(--cggedi-ink);
	background-color: var(--cggedi-bg-elev);
	border: 1px solid var(--cggedi-line);
	border-radius: var(--cggedi-radius-sm);
	padding: 0.75rem 1rem;
	display: inline-block;
}
.cggedi-calc-worked {
	background-color: var(--cggedi-bg-elev);
	border: 1px solid var(--cggedi-line);
	border-radius: var(--cggedi-radius-sm);
	padding: 1rem 1.15rem;
	margin: 1rem 0;
	max-width: 34rem;
}
.cggedi-calc-worked p { margin: 0 0 0.35rem; color: var(--cggedi-ink-dim); }
.cggedi-calc-worked p:last-child { margin-bottom: 0; }
.cggedi-calc-edu-section--notice {
	border-left: 3px solid var(--cggedi-gold);
	padding-left: 1.1rem;
}

/* --- W4 correction: start date, transaction controls, summary list ------ */
.cggedi-calc-field input[type="date"],
.cggedi-calc-field select {
	width: 100%;
	max-width: 18rem;
	padding: 0.55rem 0.7rem;
	font: inherit;
	color: var(--cggedi-ink);
	background-color: var(--cggedi-bg-elev-2);
	border: 1px solid var(--cggedi-line-strong);
	border-radius: var(--cggedi-radius-sm);
	-webkit-appearance: none;
	appearance: none;
}
.cggedi-calc-radios {
	display: flex;
	flex-wrap: wrap;
	gap: 0.5rem 1.25rem;
	margin-bottom: 0.75rem;
}
.cggedi-calc-txn-detail {
	margin-top: 0.5rem;
	padding-top: 0.75rem;
	border-top: 1px dashed var(--cggedi-line);
}
.cggedi-calc-txn-detail[hidden],
.cggedi-calc-field[hidden] { display: none; }

.cggedi-calc-summary-lead {
	color: var(--cggedi-ink-dim);
	margin: 0 0 1rem;
	max-width: 66ch;
}
.cggedi-calc-summary-list {
	margin: 0;
	display: grid;
	gap: 0;
}
.cggedi-calc-summary-row {
	display: flex;
	flex-wrap: wrap;
	justify-content: space-between;
	gap: 0.25rem 1.5rem;
	padding: 0.45rem 0;
	border-bottom: 1px solid var(--cggedi-line);
}
.cggedi-calc-summary-row dt { margin: 0; color: var(--cggedi-ink-dim); }
.cggedi-calc-summary-row dd {
	margin: 0;
	font-weight: 600;
	color: var(--cggedi-ink);
	font-variant-numeric: tabular-nums;
}

/* --- Desktop: two columns ------------------------------------------------- */
@media (min-width: 48em) {
	.cggedi-calc-layout {
		grid-template-columns: minmax(0, 15rem) minmax(0, 1fr);
		gap: 2.5rem;
	}
	.cggedi-calc-cadence {
		position: sticky;
		top: 5.5rem;
	}
	.cggedi-calc-portrait { max-width: 100%; }
	.cggedi-calc-toc ul {
		grid-template-columns: repeat(2, minmax(0, 1fr));
	}
	.cggedi-calc-summary-list {
		grid-template-columns: repeat(2, minmax(0, 1fr));
		column-gap: 2.5rem;
	}
}

/* --- Reduced motion ---------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
	.cggedi-btn { transition: none; }
}