/* =========================================================
   Proportion Calculator — Teal / Navy theme
   (shares the same design tokens as the other calculator plugins
   in this family for a consistent look)
   ========================================================= */
.prc-widget {
	--prc-bg:            #0A1930;
	--prc-panel:         #0F2440;
	--prc-panel-raised:  #12294A;
	--prc-border:        #1E3A5C;
	--prc-border-soft:   #16324F;
	--prc-teal:          #2DD4BF;
	--prc-teal-dim:      #1B8F82;
	--prc-teal-soft:     rgba(45, 212, 191, 0.12);
	--prc-navy-accent:   #3B6EA5;
	--prc-text:          #E7F1F6;
	--prc-text-muted:    #7E97B2;
	--prc-text-faint:    #5A7290;
	--prc-error:         #FF7A7A;
	--prc-amber:         #FF8F70;
	--prc-blue:          #8FD6FF;
	--prc-green:         #6EE7A8;
	--prc-radius:        10px;
	--prc-font-display:  'Space Grotesk', 'Segoe UI', sans-serif;
	--prc-font-mono:     'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;

	box-sizing: border-box;
	max-width: 660px;
	margin: 2rem auto;
	background: linear-gradient(180deg, var(--prc-panel) 0%, var(--prc-bg) 100%);
	border: 1px solid var(--prc-border);
	border-radius: 16px;
	padding: 0 0 1.75rem;
	color: var(--prc-text);
	font-family: var(--prc-font-display);
	box-shadow: 0 20px 50px -20px rgba(0, 0, 0, 0.6);
	overflow: hidden;
}

.prc-widget *,
.prc-widget *::before,
.prc-widget *::after {
	box-sizing: border-box;
}

/* ---------- Header ---------- */
.prc-header {
	display: flex;
	align-items: center;
	gap: 0.65rem;
	padding: 1.15rem 1.5rem;
	background: linear-gradient(90deg, #123653 0%, #0E2846 100%);
	border-bottom: 1px solid var(--prc-border);
}

.prc-header__icon {
	display: inline-flex;
	color: var(--prc-teal);
	filter: drop-shadow(0 0 6px rgba(45, 212, 191, 0.45));
}

.prc-header__title {
	margin: 0;
	font-size: 1.1rem;
	font-weight: 700;
	letter-spacing: 0.01em;
	color: var(--prc-text);
}

/* ---------- Grid layout ---------- */
.prc-grid {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 1.1rem 1.25rem;
	padding: 1.5rem 1.5rem 0;
}

.prc-field--full {
	grid-column: 1 / -1;
}

.prc-label {
	display: block;
	font-size: 0.72rem;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.08em;
	color: var(--prc-text-muted);
	margin-bottom: 0.4rem;
}

.prc-unit-tag {
	text-transform: none;
	color: var(--prc-teal);
	font-weight: 500;
	letter-spacing: 0;
}

/* ---------- Inputs ---------- */
.prc-input {
	width: 100%;
	font-family: var(--prc-font-mono);
	font-size: 0.95rem;
	border-radius: var(--prc-radius);
	padding: 0.6rem 0.75rem;
	line-height: 1.3;
	background: var(--prc-panel-raised);
	border: 1px solid var(--prc-border);
	color: var(--prc-text);
	appearance: none;
	transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.prc-input::placeholder {
	color: var(--prc-text-faint);
}

.prc-input:hover {
	border-color: var(--prc-navy-accent);
}

.prc-input:focus {
	outline: none;
	border-color: var(--prc-teal);
	box-shadow: 0 0 0 3px var(--prc-teal-soft);
}

.prc-input.prc-input--invalid {
	border-color: var(--prc-error);
	box-shadow: 0 0 0 3px rgba(255, 122, 122, 0.14);
}

/* ---------- Numbers textarea ---------- */
.prc-input-fractions {
	resize: vertical;
	min-height: 5.5rem;
	line-height: 1.5;
}

.prc-meta {
	grid-column: 1 / -1;
	display: flex;
	justify-content: space-between;
	align-items: center;
	font-size: 0.78rem;
	color: var(--prc-text-muted);
	margin-top: -0.5rem;
}

.prc-meta-invalid {
	color: var(--prc-amber);
}

/* ---------- Error message ---------- */
.prc-error {
	grid-column: 1 / -1;
	display: none;
	font-size: 0.82rem;
	color: var(--prc-error);
	background: rgba(255, 122, 122, 0.08);
	border: 1px solid rgba(255, 122, 122, 0.35);
	border-radius: var(--prc-radius);
	padding: 0.6rem 0.85rem;
}

.prc-error.is-visible {
	display: block;
}

/* ---------- Results ---------- */
.prc-results {
	grid-column: 1 / -1;
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 0.9rem;
	margin-top: 0.4rem;
	padding-top: 1.4rem;
	border-top: 1px dashed var(--prc-border);
}

.prc-result-card {
	background: var(--prc-bg);
	border: 1px solid var(--prc-border-soft);
	border-radius: var(--prc-radius);
	padding: 0.75rem 0.9rem;
	display: flex;
	flex-direction: column;
	gap: 0.3rem;
}

.prc-result-card--full {
	grid-column: 1 / -1;
}

.prc-result-card--primary {
	background: linear-gradient(135deg, rgba(45, 212, 191, 0.1), rgba(59, 110, 165, 0.1));
	border: 1px solid var(--prc-teal);
	box-shadow: 0 0 0 3px var(--prc-teal-soft);
	padding: 1rem 1.1rem;
}

.prc-result-label-primary {
	color: var(--prc-teal);
}

.prc-result-label {
	font-size: 0.68rem;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.07em;
	color: var(--prc-text-muted);
}

.prc-result-value {
	font-family: var(--prc-font-mono);
	font-size: 1.15rem;
	font-weight: 600;
	color: var(--prc-teal);
}

.prc-result-primary {
	font-size: 1.9rem;
	color: var(--prc-text);
}

.prc-result-equation { color: var(--prc-blue); font-size: 1.1rem; }
.prc-result-decimal { color: var(--prc-amber); }
.prc-result-cross { color: var(--prc-green); font-size: 0.95rem; }

/* ---------- Equation label ---------- */
.prc-equation-label {
	display: block;
	text-align: center;
	font-family: var(--prc-font-mono);
	font-size: 1.2rem;
	font-weight: 600;
	color: var(--prc-text-muted);
	letter-spacing: 0.02em;
}

/* ---------- a/b, c/d input row ---------- */
.prc-fraction-row {
	display: flex;
	align-items: flex-end;
	gap: 0.6rem;
}

.prc-fraction-part {
	flex: 1;
	display: flex;
	flex-direction: column;
	gap: 0.4rem;
}

.prc-fraction-part .prc-input {
	text-align: center;
}

.prc-fraction-part .prc-input:disabled {
	opacity: 0.5;
	cursor: not-allowed;
	background: var(--prc-bg);
	color: var(--prc-text-faint);
	font-style: italic;
}

/* ---------- Unit select dropdown ---------- */
.prc-select {
	background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='6'><path d='M0 0l5 6 5-6z' fill='%237E97B2'/></svg>");
	background-repeat: no-repeat;
	background-position: right 0.85rem center;
	padding-right: 2rem;
	cursor: pointer;
	color: var(--prc-teal);
}

/* ---------- Pill radio group ---------- */
.prc-pill-row {
	display: flex;
	flex-wrap: wrap;
	gap: 0.5rem;
}

.prc-pill {
	position: relative;
	flex: 1;
	min-width: fit-content;
}

.prc-pill input {
	position: absolute;
	opacity: 0;
	inset: 0;
	margin: 0;
	cursor: pointer;
}

.prc-pill span {
	display: flex;
	align-items: center;
	justify-content: center;
	height: 2.4rem;
	padding: 0 0.75rem;
	border-radius: var(--prc-radius);
	background: var(--prc-panel-raised);
	border: 1px solid var(--prc-border);
	color: var(--prc-text-muted);
	font-weight: 600;
	font-size: 0.85rem;
	white-space: nowrap;
	transition: all 0.15s ease;
}

.prc-pill input:hover + span {
	border-color: var(--prc-navy-accent);
	color: var(--prc-text);
}

.prc-pill input:checked + span {
	background: linear-gradient(135deg, var(--prc-teal-dim), var(--prc-teal));
	border-color: var(--prc-teal);
	color: #06201C;
	box-shadow: 0 0 0 3px var(--prc-teal-soft);
}

/* ---------- Buttons ---------- */
.prc-actions {
	grid-column: 1 / -1;
	display: flex;
}

.prc-btn {
	font-family: var(--prc-font-display);
	font-weight: 600;
	font-size: 0.85rem;
	border-radius: var(--prc-radius);
	padding: 0.6rem 1rem;
	border: 1px solid transparent;
	cursor: pointer;
	transition: all 0.15s ease;
}

.prc-btn--primary {
	width: 100%;
	background: linear-gradient(135deg, var(--prc-teal-dim), var(--prc-teal));
	color: #06201C;
	box-shadow: 0 0 0 3px var(--prc-teal-soft);
}

.prc-btn--primary:hover {
	filter: brightness(1.05);
}

.prc-btn--ghost {
	background: var(--prc-panel-raised);
	border-color: var(--prc-border);
	color: var(--prc-text-muted);
}

.prc-btn--ghost:hover {
	border-color: var(--prc-teal);
	color: var(--prc-text);
}

.prc-btn--text {
	background: transparent;
	color: var(--prc-text-faint);
	padding: 0.6rem 0.7rem;
}

.prc-btn--text:hover {
	color: var(--prc-error);
}

.prc-btn:disabled {
	opacity: 0.4;
	cursor: not-allowed;
}

/* ---------- History section ---------- */
.prc-history-section {
	border-top: 1px dashed var(--prc-border);
	padding-top: 1.1rem;
	margin-top: 0.2rem;
}

.prc-history-header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	flex-wrap: wrap;
	gap: 0.6rem;
	margin-bottom: 0.7rem;
}

.prc-history-title {
	margin-bottom: 0;
}

.prc-history-count {
	color: var(--prc-teal);
	font-weight: 600;
}

.prc-history-actions {
	display: flex;
	gap: 0.5rem;
	flex-wrap: wrap;
}

.prc-history-empty {
	font-size: 0.82rem;
	color: var(--prc-text-faint);
	text-align: center;
	padding: 1.2rem 0.5rem;
	border: 1px dashed var(--prc-border-soft);
	border-radius: var(--prc-radius);
}

.prc-history-list {
	display: flex;
	flex-direction: column;
	gap: 0.5rem;
	max-height: 260px;
	overflow-y: auto;
}

.prc-history-item {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 0.6rem;
	background: var(--prc-bg);
	border: 1px solid var(--prc-border-soft);
	border-radius: var(--prc-radius);
	padding: 0.6rem 0.8rem;
}

.prc-history-item__main {
	display: flex;
	flex-direction: column;
	gap: 0.15rem;
	min-width: 0;
}

.prc-history-item__equation {
	font-family: var(--prc-font-mono);
	font-size: 0.9rem;
	color: var(--prc-text);
	white-space: nowrap;
	overflow: hidden;
	text-overflow: ellipsis;
}

.prc-history-item__meta {
	font-size: 0.68rem;
	color: var(--prc-text-faint);
}

.prc-history-item__delete {
	flex: 0 0 auto;
	background: transparent;
	border: none;
	color: var(--prc-text-faint);
	font-size: 1.1rem;
	line-height: 1;
	cursor: pointer;
	padding: 0.3rem 0.5rem;
}

.prc-history-item__delete:hover {
	color: var(--prc-error);
}

/* ---------- Responsive ---------- */
@media (max-width: 560px) {
	.prc-grid {
		grid-template-columns: 1fr;
		padding: 1.25rem 1.1rem 0;
	}

	.prc-results {
		grid-template-columns: 1fr;
	}

	.prc-header {
		padding: 1rem 1.1rem;
	}

	.prc-widget {
		margin: 1rem auto;
		border-radius: 12px;
	}
}