/**
 * Peptide Reconstitution Calculator — Frontend Styles
 *
 * Namespace: .prc- prefix on all classes.
 * Design: Clean, card-based layout. Responsive down to 320px.
 * Dark mode: respects prefers-color-scheme.
 *
 * @see includes/frontend/class-prc-shortcode.php — HTML structure.
 */

/* ── Container ─────────────────────────────────────────────────────── */

.prc-calculator {
	max-width: 640px;
	margin: 2rem auto;
	font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
	border: 1px solid #e2e8f0;
	border-radius: 12px;
	background: #ffffff;
	box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
	overflow: hidden;
}

/* ── Header ────────────────────────────────────────────────────────── */

.prc-calculator__header {
	padding: 1.25rem 1.5rem;
	background: linear-gradient(135deg, var(--teal-700), var(--teal-500));
	color: #ffffff;
}

.prc-calculator__title {
	margin: 0;
	font-size: 1.25rem;
	font-weight: 600;
	letter-spacing: -0.01em;
}

/* ── Body (form fields) ───────────────────────────────────────────── */

.prc-calculator__body {
	padding: 1.5rem;
	display: flex;
	flex-direction: column;
	gap: 1.25rem;
}

/* ── Field ─────────────────────────────────────────────────────────── */

.prc-field {
	display: flex;
	flex-direction: column;
	gap: 0.375rem;
}

.prc-field--hidden {
	display: none;
}

.prc-field__label {
	font-size: 0.875rem;
	font-weight: 600;
	color: #374151;
}

.prc-field__row {
	display: flex;
	align-items: center;
	gap: 0.5rem;
}

.prc-field__input {
	flex: 1;
	padding: 0.625rem 0.75rem;
	border: 1px solid #d1d5db;
	border-radius: 8px;
	font-size: 1rem;
	color: #111827;
	background: #f9fafb;
	transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.prc-field__input:focus {
	outline: none;
	border-color: var(--teal-500);
	box-shadow: 0 0 0 3px rgba(27, 138, 146, 0.15);
	background: #ffffff;
}

.prc-field__input--half {
	flex: 0 0 48%;
}

.prc-field__input--unit {
	flex: 0 0 80px;
}

.prc-field__unit {
	font-size: 0.875rem;
	font-weight: 500;
	color: #6b7280;
	min-width: 28px;
}

.prc-field__hint {
	font-size: 0.8rem;
	color: #6b7280;
	margin-top: 0.125rem;
}

.prc-field__static {
	font-size: 0.95rem;
	color: #374151;
	font-weight: 500;
}

.prc-field__custom-wrap {
	display: flex;
	align-items: center;
	gap: 0.375rem;
	flex: 1;
}

/* ── Results Panel ─────────────────────────────────────────────────── */

.prc-results {
	padding: 1.5rem;
	border-top: 1px solid #e5e7eb;
	background: var(--teal-50);
}

.prc-results--hidden {
	display: none;
}

.prc-results__title {
	margin: 0 0 1rem 0;
	font-size: 1rem;
	font-weight: 600;
	color: var(--teal-700);
}

.prc-results__grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
	gap: 0.75rem;
}

/* ── Result Card ───────────────────────────────────────────────────── */

.prc-result-card {
	background: #ffffff;
	border: 1px solid #e2e8f0;
	border-radius: 8px;
	padding: 1rem;
	text-align: center;
	transition: transform 0.15s ease;
}

.prc-result-card--primary {
	border-color: var(--teal-500);
	background: var(--teal-50);
}

.prc-result-card__value {
	font-size: 1.5rem;
	font-weight: 700;
	color: #111827;
	line-height: 1.2;
}

.prc-result-card--primary .prc-result-card__value {
	color: var(--teal-700);
	font-size: 1.75rem;
}

.prc-result-card__label {
	font-size: 0.75rem;
	color: #6b7280;
	margin-top: 0.375rem;
	line-height: 1.3;
}

/* ── Disclaimer ────────────────────────────────────────────────────── */

.prc-disclaimer {
	padding: 0.75rem 1.5rem 1rem;
	font-size: 0.75rem;
	color: #9ca3af;
	line-height: 1.5;
	border-top: 1px solid #f3f4f6;
}

/* ── Noscript ──────────────────────────────────────────────────────── */

.prc-noscript {
	padding: 1.5rem;
	text-align: center;
	color: #6b7280;
}

/* ── Dark Mode ─────────────────────────────────────────────────────── */

@media (prefers-color-scheme: dark) {
	.prc-calculator {
		background: #1f2937;
		border-color: #374151;
	}

	.prc-calculator__header {
		background: linear-gradient(135deg, var(--teal-800), var(--teal-600));
	}

	.prc-field__label {
		color: #d1d5db;
	}

	.prc-field__input {
		background: #111827;
		border-color: #4b5563;
		color: #f3f4f6;
	}

	.prc-field__input:focus {
		background: #1f2937;
		border-color: var(--teal-400);
		box-shadow: 0 0 0 3px rgba(27, 138, 146, 0.2);
	}

	.prc-field__unit,
	.prc-field__hint {
		color: #9ca3af;
	}

	.prc-field__static {
		color: #d1d5db;
	}

	.prc-results {
		background: #111827;
		border-color: #374151;
	}

	.prc-results__title {
		color: var(--teal-400);
	}

	.prc-result-card {
		background: #1f2937;
		border-color: #374151;
	}

	.prc-result-card--primary {
		background: var(--teal-900);
		border-color: var(--teal-600);
	}

	.prc-result-card__value {
		color: #f3f4f6;
	}

	.prc-result-card--primary .prc-result-card__value {
		color: var(--teal-300);
	}

	.prc-result-card__label {
		color: #9ca3af;
	}

	.prc-disclaimer {
		color: #6b7280;
		border-color: #374151;
	}
}

/* ── Responsive ────────────────────────────────────────────────────── */

@media (max-width: 480px) {
	.prc-calculator {
		margin: 1rem;
		border-radius: 8px;
	}

	.prc-calculator__body {
		padding: 1rem;
	}

	.prc-results {
		padding: 1rem;
	}

	.prc-results__grid {
		grid-template-columns: repeat(2, 1fr);
	}

	.prc-field__row {
		flex-wrap: wrap;
	}

	.prc-field__input--half {
		flex: 1 1 100%;
	}
}