/* Programmer Calculator — Teal & Navy theme */

.pcalc-widget {
	--pc-navy-950: #0a1120;
	--pc-navy-900: #0f172a;
	--pc-navy-850: #131f36;
	--pc-navy-800: #16223b;
	--pc-navy-700: #1e2c4a;
	--pc-navy-600: #28395c;
	--pc-teal-300: #5eead4;
	--pc-teal-400: #2dd4bf;
	--pc-teal-500: #14b8a6;
	--pc-teal-600: #0d9488;
	--pc-text-soft: #94a3b8;
	--pc-text-faint: #4c5c7a;

	max-width: 420px;
	margin: 2rem auto;
	padding: 1.5rem;
	border-radius: 22px;
	background: linear-gradient(160deg, var(--pc-navy-900) 0%, var(--pc-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;
	box-sizing: border-box;
	user-select: none;
	overflow: hidden;
}

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

/* ---------- Header ---------- */

.pcalc-header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	margin-bottom: 0.85rem;
}

.pcalc-title {
	font-size: 1.15rem;
	font-weight: 800;
	color: #f1f5f9;
	letter-spacing: -0.01em;
}

.pcalc-dropdown-wrap {
	position: relative;
}

.pcalc-wordsize-btn,
.pcalc-op-toggle {
	display: inline-flex;
	align-items: center;
	gap: 0.3rem;
	padding: 0.4rem 0.65rem;
	border-radius: 9px;
	border: 1px solid rgba(94, 234, 212, 0.18);
	background: var(--pc-navy-800);
	color: var(--pc-teal-300);
	font-family: inherit;
	font-size: 0.75rem;
	font-weight: 700;
	letter-spacing: 0.02em;
	cursor: pointer;
	transition: background 0.15s ease, border-color 0.15s ease;
}

.pcalc-wordsize-btn:hover,
.pcalc-op-toggle:hover {
	background: var(--pc-navy-700);
	border-color: rgba(94, 234, 212, 0.35);
}

.pcalc-chevron {
	width: 14px;
	height: 14px;
	fill: currentColor;
}

.pcalc-menu {
	position: absolute;
	z-index: 20;
	top: calc(100% + 6px);
	right: 0;
	min-width: 190px;
	list-style: none;
	margin: 0;
	padding: 0.4rem;
	border-radius: 12px;
	background: var(--pc-navy-850);
	border: 1px solid rgba(94, 234, 212, 0.18);
	box-shadow: 0 14px 30px -10px rgba(10, 17, 32, 0.7);
}

.pcalc-menu li + li {
	margin-top: 2px;
}

.pcalc-menu button {
	display: flex;
	align-items: center;
	justify-content: space-between;
	width: 100%;
	padding: 0.5rem 0.6rem;
	border: none;
	border-radius: 8px;
	background: transparent;
	color: #e2e8f0;
	font-family: inherit;
	font-size: 0.85rem;
	font-weight: 600;
	text-align: left;
	cursor: pointer;
}

.pcalc-menu button span {
	color: var(--pc-text-faint);
	font-weight: 500;
	font-size: 0.72rem;
}

.pcalc-menu button:hover {
	background: var(--pc-navy-700);
}

.pcalc-menu-radio label {
	display: flex;
	align-items: center;
	gap: 0.5rem;
	padding: 0.5rem 0.6rem;
	border-radius: 8px;
	color: #e2e8f0;
	font-size: 0.82rem;
	font-weight: 500;
	cursor: pointer;
}

.pcalc-menu-radio label:hover {
	background: var(--pc-navy-700);
}

.pcalc-menu-radio input {
	accent-color: var(--pc-teal-500);
	width: 15px;
	height: 15px;
	flex-shrink: 0;
}

/* ---------- Display ---------- */

.pcalc-expression {
	min-height: 1.2rem;
	text-align: right;
	font-size: 0.85rem;
	color: var(--pc-text-faint);
	font-variant-numeric: tabular-nums;
	overflow: hidden;
	white-space: nowrap;
	text-overflow: ellipsis;
}

.pcalc-display {
	text-align: right;
	font-size: 2.4rem;
	font-weight: 700;
	color: #f8fafc;
	padding: 0.35rem 0 0.9rem;
	font-variant-numeric: tabular-nums;
	word-break: break-all;
	overflow-wrap: anywhere;
	line-height: 1.15;
}

/* ---------- Base rows ---------- */

.pcalc-bases {
	display: flex;
	flex-direction: column;
	gap: 2px;
	margin-bottom: 0.9rem;
	border-radius: 12px;
	overflow: hidden;
	background: rgba(15, 23, 42, 0.55);
	border: 1px solid rgba(94, 234, 212, 0.12);
}

.pcalc-base-row {
	display: flex;
	align-items: center;
	gap: 0.9rem;
	padding: 0.45rem 0.85rem;
	border: none;
	border-left: 3px solid transparent;
	background: transparent;
	cursor: pointer;
	text-align: left;
	transition: background 0.15s ease, border-color 0.15s ease;
}

.pcalc-base-row:hover {
	background: rgba(30, 44, 74, 0.4);
}

.pcalc-base-row.is-active {
	border-left-color: var(--pc-teal-400);
	background: rgba(30, 44, 74, 0.45);
}

.pcalc-base-label {
	width: 3ch;
	font-size: 0.72rem;
	font-weight: 700;
	letter-spacing: 0.04em;
	color: var(--pc-text-soft);
}

.pcalc-base-row.is-active .pcalc-base-label {
	color: var(--pc-teal-300);
}

.pcalc-base-value {
	flex: 1;
	font-size: 0.92rem;
	font-weight: 600;
	color: #cbd5e1;
	font-variant-numeric: tabular-nums;
	overflow-x: auto;
	white-space: nowrap;
	scrollbar-width: none;
}

.pcalc-base-value::-webkit-scrollbar {
	display: none;
}

.pcalc-base-row.is-active .pcalc-base-value {
	color: #f1f5f9;
}

/* ---------- Toolbar ---------- */

.pcalc-toolbar {
	display: flex;
	align-items: center;
	justify-content: space-between;
	margin-bottom: 0.6rem;
}

.pcalc-icon-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 34px;
	height: 34px;
	border-radius: 9px;
	border: 1px solid rgba(94, 234, 212, 0.18);
	background: var(--pc-navy-800);
	color: var(--pc-text-soft);
	cursor: pointer;
	transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.pcalc-icon-btn svg {
	width: 16px;
	height: 16px;
	fill: currentColor;
}

.pcalc-icon-btn:hover {
	color: var(--pc-teal-300);
	border-color: rgba(94, 234, 212, 0.35);
}

.pcalc-icon-btn[aria-pressed="true"] {
	background: linear-gradient(135deg, var(--pc-teal-400), var(--pc-teal-600));
	color: var(--pc-navy-950);
	border-color: transparent;
}

.pcalc-memory {
	position: relative;
	display: flex;
	gap: 0.3rem;
}

.pcalc-memory button {
	padding: 0.4rem 0.55rem;
	border-radius: 8px;
	border: 1px solid rgba(94, 234, 212, 0.15);
	background: var(--pc-navy-800);
	color: var(--pc-text-soft);
	font-family: inherit;
	font-size: 0.72rem;
	font-weight: 700;
	cursor: pointer;
	transition: background 0.15s ease, color 0.15s ease;
}

.pcalc-memory button:hover {
	background: var(--pc-navy-700);
	color: var(--pc-teal-300);
}

.pcalc-mem-dot {
	position: absolute;
	top: -4px;
	right: -4px;
	width: 8px;
	height: 8px;
	border-radius: 50%;
	background: var(--pc-teal-400);
	box-shadow: 0 0 8px rgba(45, 212, 191, 0.7);
}

/* ---------- Ops row ---------- */

.pcalc-opsrow {
	display: flex;
	gap: 0.5rem;
	margin-bottom: 0.9rem;
}

.pcalc-opsrow .pcalc-dropdown-wrap {
	flex: 1;
}

.pcalc-opsrow .pcalc-op-toggle {
	width: 100%;
	justify-content: space-between;
}

.pcalc-opsrow .pcalc-menu {
	left: 0;
	right: auto;
	width: 100%;
}

/* ---------- Bit grid ---------- */

.pcalc-bitgrid {
	margin-bottom: 0.9rem;
	padding: 0.85rem 0.75rem 0.6rem;
	border-radius: 12px;
	background: rgba(15, 23, 42, 0.55);
	border: 1px solid rgba(94, 234, 212, 0.12);
	display: flex;
	flex-direction: column;
	gap: 0.6rem;
	width: 100%;
	overflow: hidden;
}

.pcalc-bitrow {
	display: flex;
	width: 100%;
	gap: 4px;
}

.pcalc-nibble {
	flex: 1 1 0;
	min-width: 0;
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: 0.3rem;
}

.pcalc-nibble-bits {
	display: flex;
	width: 100%;
	gap: 2px;
}

.pcalc-bit {
	flex: 1 1 0;
	min-width: 0;
	width: auto;
	height: 26px;
	padding: 0;
	border-radius: 5px;
	border: 1px solid rgba(94, 234, 212, 0.2);
	background: var(--pc-navy-800);
	color: var(--pc-text-soft);
	font-family: inherit;
	font-size: 0.62rem;
	font-weight: 700;
	cursor: pointer;
	transition: background 0.12s ease, color 0.12s ease, transform 0.1s ease;
}

.pcalc-bit:hover {
	border-color: rgba(94, 234, 212, 0.5);
}

.pcalc-bit:active {
	transform: scale(0.92);
}

.pcalc-bit.is-set {
	background: linear-gradient(135deg, var(--pc-teal-400), var(--pc-teal-600));
	color: var(--pc-navy-950);
	border-color: transparent;
}

.pcalc-nibble-label {
	font-size: 0.62rem;
	color: var(--pc-text-faint);
	font-variant-numeric: tabular-nums;
}

/* ---------- Keypad ---------- */

.pcalc-keypad {
	display: grid;
	grid-template-columns: 46px 1fr;
	gap: 0.5rem;
}

.pcalc-hexcol {
	display: grid;
	grid-template-rows: repeat(6, 1fr);
	gap: 0.4rem;
}

.pcalc-mainpad {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: 0.4rem;
}

.pcalc-hexcol button,
.pcalc-key {
	border: 1px solid rgba(94, 234, 212, 0.12);
	border-radius: 10px;
	background: var(--pc-navy-800);
	color: #e2e8f0;
	font-family: inherit;
	font-size: 0.95rem;
	font-weight: 600;
	padding: 0.65rem 0;
	cursor: pointer;
	transition: background 0.12s ease, transform 0.1s ease, opacity 0.15s ease;
}

.pcalc-hexcol button:hover,
.pcalc-key:hover {
	background: var(--pc-navy-700);
}

.pcalc-hexcol button:active,
.pcalc-key:active {
	transform: scale(0.96);
}

.pcalc-hexcol button:disabled,
.pcalc-key:disabled,
.pcalc-hexcol button.is-disabled,
.pcalc-key.is-disabled {
	opacity: 0.3;
	cursor: not-allowed;
	pointer-events: none;
}

.pcalc-key-fn {
	color: var(--pc-teal-300);
	font-size: 0.85rem;
}

.pcalc-key-op {
	background: var(--pc-navy-700);
	color: var(--pc-teal-300);
	font-size: 1.1rem;
}

.pcalc-key-op.is-active-op {
	background: linear-gradient(135deg, var(--pc-teal-400), var(--pc-teal-600));
	color: var(--pc-navy-950);
}

.pcalc-key-equals {
	background: linear-gradient(135deg, var(--pc-teal-400), var(--pc-teal-600));
	color: var(--pc-navy-950);
	font-size: 1.2rem;
	box-shadow: 0 8px 18px -6px rgba(20, 184, 166, 0.55);
}

.pcalc-key-equals:hover {
	filter: brightness(1.05);
}

@media (max-width: 400px) {
	.pcalc-display {
		font-size: 1.9rem;
	}
	.pcalc-bit {
		font-size: 0.55rem;
	}
	.pcalc-nibble-label {
		font-size: 0.56rem;
	}
}