/* E=mc² Calculator — Teal & Navy theme */

.emc-widget {
	--emc-navy-950: #0a1120;
	--emc-navy-900: #0f172a;
	--emc-navy-800: #16223b;
	--emc-teal-300: #5eead4;
	--emc-teal-400: #2dd4bf;
	--emc-teal-600: #0d9488;
	--emc-text-soft: #94a3b8;
	--emc-text-faint: #4c5c7a;

	max-width: 480px;
	margin: 2rem auto;
	padding: 2rem 1.75rem 1.75rem;
	border-radius: 22px;
	background: linear-gradient(160deg, var(--emc-navy-900) 0%, var(--emc-navy-950) 100%);
	box-shadow:
		0 20px 45px -15px rgba(10, 17, 32, 0.55),
		0 0 0 1px rgba(45, 212, 191, 0.12),
		inset 0 1px 0 rgba(255, 255, 255, 0.04);
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
	position: relative;
	overflow: hidden;
	box-sizing: border-box;
}

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

.emc-widget::before {
	content: "";
	position: absolute;
	top: -60%;
	left: 50%;
	width: 140%;
	height: 140%;
	transform: translateX(-50%);
	background: radial-gradient(circle, rgba(45, 212, 191, 0.14) 0%, rgba(45, 212, 191, 0) 60%);
	pointer-events: none;
}

.emc-header {
	text-align: center;
	margin-bottom: 1.25rem;
	position: relative;
}

.emc-eyebrow {
	display: inline-block;
	font-size: 0.72rem;
	font-weight: 700;
	letter-spacing: 0.22em;
	color: var(--emc-teal-300);
	text-transform: uppercase;
}

.emc-title {
	margin: 0.35rem 0 0;
	font-size: 1.5rem;
	font-weight: 800;
	color: #f1f5f9;
	letter-spacing: -0.01em;
}

/* ---------- Tabs ---------- */

.emc-tabs {
	display: flex;
	gap: 0.3rem;
	padding: 0.3rem;
	margin-bottom: 1.1rem;
	background: rgba(15, 23, 42, 0.55);
	border: 1px solid rgba(94, 234, 212, 0.15);
	border-radius: 14px;
}

.emc-tab {
	flex: 1;
	padding: 0.6rem 0.4rem;
	border: none;
	border-radius: 10px;
	background: transparent;
	color: var(--emc-text-soft);
	font-family: inherit;
	font-size: 0.82rem;
	font-weight: 600;
	cursor: pointer;
	transition: background 0.2s ease, color 0.2s ease;
}

.emc-tab:hover {
	color: #e2e8f0;
}

.emc-tab.is-active {
	background: linear-gradient(135deg, var(--emc-teal-400), var(--emc-teal-600));
	color: var(--emc-navy-950);
	box-shadow: 0 6px 16px -6px rgba(20, 184, 166, 0.6);
}

/* ---------- Field ---------- */

.emc-field {
	margin-bottom: 1.1rem;
}

.emc-label {
	display: block;
	font-size: 0.72rem;
	font-weight: 600;
	letter-spacing: 0.03em;
	text-transform: uppercase;
	color: var(--emc-teal-300);
	margin-bottom: 0.4rem;
}

.emc-input-row {
	display: grid;
	grid-template-columns: 1fr 1.3fr;
	gap: 0.5rem;
}

.emc-input,
.emc-unit {
	width: 100%;
	padding: 0.7rem 0.8rem;
	border-radius: 12px;
	border: 1px solid rgba(94, 234, 212, 0.18);
	background: var(--emc-navy-800);
	color: #f1f5f9;
	font-family: inherit;
	font-size: 0.92rem;
	font-variant-numeric: tabular-nums;
	outline: none;
	transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.emc-unit {
	cursor: pointer;
	font-size: 0.85rem;
}

.emc-input::placeholder {
	color: #506080;
}

.emc-input:focus,
.emc-unit:focus {
	border-color: var(--emc-teal-400);
	box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.18);
}

/* ---------- Primary result ---------- */

.emc-primary {
	text-align: center;
	padding: 1.1rem;
	border-radius: 14px;
	background: rgba(30, 44, 74, 0.45);
	border: 1px solid rgba(94, 234, 212, 0.15);
	margin-bottom: 0.9rem;
}

.emc-primary-label {
	display: block;
	font-size: 0.72rem;
	font-weight: 700;
	letter-spacing: 0.03em;
	text-transform: uppercase;
	color: var(--emc-text-faint);
	margin-bottom: 0.3rem;
}

.emc-primary-value {
	font-size: 1.5rem;
	font-weight: 800;
	color: var(--emc-teal-300);
	font-variant-numeric: tabular-nums;
	word-break: break-word;
	text-shadow: 0 0 18px rgba(45, 212, 191, 0.25);
}

/* ---------- Conversion grid ---------- */

.emc-grid {
	display: grid;
	grid-template-columns: repeat(2, 1fr);
	gap: 0.5rem;
	margin-bottom: 1rem;
}

.emc-cell {
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: 0.25rem;
	padding: 0.7rem 0.4rem;
	border-radius: 10px;
	background: rgba(15, 23, 42, 0.55);
	border: 1px solid rgba(94, 234, 212, 0.12);
	text-align: center;
}

.emc-cell-label {
	font-size: 0.64rem;
	font-weight: 700;
	letter-spacing: 0.02em;
	color: var(--emc-text-faint);
}

.emc-cell-value {
	font-size: 0.85rem;
	font-weight: 700;
	color: #e2e8f0;
	font-variant-numeric: tabular-nums;
	word-break: break-word;
}

/* ---------- Formula ---------- */

.emc-formula {
	font-size: 0.78rem;
	color: var(--emc-text-faint);
	text-align: center;
}

@media (max-width: 420px) {
	.emc-input-row {
		grid-template-columns: 1fr;
	}
	.emc-grid {
		grid-template-columns: 1fr;
	}
}