/* Calculadora — sempre dark (igual ao nativo dos prints), ignora tema do telefone */
:root {
	--calc-bg: #000000;
	--calc-text: #ffffff;
	--calc-expression: #8e8e93;
	--calc-key-num: #333333;
	--calc-key-fn: #636366;
	--calc-key-fn-text: #ffffff;
	--calc-key-op: #ff9f0a;
	--calc-top-btn: #1c1c1e;
	--calc-top-icon: #ebebf5;
	--calc-sheet: rgba(44, 44, 46, 0.92);
	--calc-sheet-border: rgba(84, 84, 88, 0.65);
	--calc-sheet-handle: rgba(235, 235, 245, 0.3);
	--calc-sheet-muted: #8e8e93;
	--calc-sheet-divider: rgba(84, 84, 88, 0.55);
	--calc-sheet-highlight: rgba(255, 255, 255, 0.08);
	--calc-close-btn: rgba(120, 120, 128, 0.36);
	--calc-danger: #ff453a;
	--safe-top: 3.4rem;
	--safe-bottom: 2.75rem;
	--side-pad: 0.9rem;
	--pad-gap: 0.7rem;
	--result-max: 5.6rem;
}

*,
*::before,
*::after {
	box-sizing: border-box;
	-webkit-tap-highlight-color: transparent;
	user-select: none;
}

html,
body {
	margin: 0;
	width: 100%;
	height: 100%;
	overflow: hidden;
	background: var(--calc-bg);
	color: var(--calc-text);
	color-scheme: dark !important;
	font-family: "SF Pro Display", "SF Pro Text", -apple-system, BlinkMacSystemFont,
		"Helvetica Neue", Helvetica, Arial, sans-serif;
}

.calc-app {
	position: relative;
	display: flex;
	flex-direction: column;
	width: 100%;
	height: 100%;
	padding: var(--safe-top) var(--side-pad) var(--safe-bottom);
	background: var(--calc-bg);
	color: var(--calc-text);
	color-scheme: dark !important;
}

.calc-topbar {
	display: flex;
	align-items: center;
	justify-content: flex-start;
	flex-shrink: 0;
	padding: 0 0.1rem;
	min-height: 2.2rem;
}

.top-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 2.55rem;
	height: 2.55rem;
	padding: 0;
	border: 0;
	border-radius: 50%;
	background: var(--calc-top-btn);
	color: var(--calc-top-icon);
	cursor: pointer;
	opacity: 0.95;
}

.top-btn:disabled {
	cursor: default;
	opacity: 0.95;
}

.top-btn:active:not(:disabled) {
	filter: brightness(1.25);
}

.top-btn svg {
	width: 1.55rem;
	height: 1.55rem;
	fill: currentColor;
}

.calc-main {
	flex: 1;
	display: flex;
	flex-direction: column;
	min-height: 0;
	padding-top: 0.2rem;
}

.calc-display {
	flex: 1;
	display: flex;
	flex-direction: column;
	justify-content: flex-end;
	align-items: stretch;
	padding: 0 0.15rem 1.05rem;
	min-height: 6.5rem;
	text-align: right;
	overflow: visible;
}

.calc-expression {
	width: 100%;
	min-height: 1.25rem;
	margin-bottom: 0.1rem;
	color: var(--calc-expression);
	font-size: 1.5rem;
	font-weight: 300;
	letter-spacing: 0.01em;
	line-height: 1.1;
	white-space: nowrap;
	overflow: hidden;
	text-overflow: ellipsis;
	opacity: 0;
	transition: opacity 0.15s ease;
}

.calc-expression.is-visible {
	opacity: 1;
}

.calc-result-wrap {
	width: 100%;
	display: flex;
	justify-content: flex-end;
	align-items: flex-end;
	overflow: hidden;
	padding: 0.05rem 0 0.15rem;
	min-height: 3.8rem;
}

.calc-result {
	display: inline-block;
	max-width: 100%;
	color: var(--calc-text);
	font-size: var(--result-size, var(--result-max));
	font-weight: 300;
	letter-spacing: 0.01em;
	line-height: 1;
	padding: 0.06em 0.04em 0.08em 0;
	white-space: nowrap;
	overflow: visible;
	text-align: right;
	font-variant-numeric: lining-nums;
}

.calc-pad {
	display: grid;
	grid-template-columns: repeat(4, minmax(0, 1fr));
	gap: var(--pad-gap);
	width: 100%;
	padding: 0;
	flex-shrink: 0;
}

.key {
	position: relative;
	display: flex;
	align-items: center;
	justify-content: center;
	width: 100%;
	aspect-ratio: 1 / 1;
	height: auto;
	min-width: 0;
	margin: 0;
	padding: 0;
	border: 0;
	border-radius: 50%;
	font-family: inherit;
	font-size: clamp(2.1rem, 8.6vw, 2.55rem);
	font-weight: 400;
	line-height: 0;
	text-align: center;
	cursor: pointer;
	transition: filter 0.12s ease, background-color 0.12s ease, color 0.12s ease;
}

.key > span {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 100%;
	height: 100%;
	line-height: 1;
	transform: translateY(0.02em);
}

.key:active {
	filter: brightness(1.35);
}

.key:focus,
.key:focus-visible {
	outline: none;
}

.key svg {
	display: block;
	flex-shrink: 0;
	width: 1.85rem;
	height: 1.85rem;
	margin: 0;
	overflow: visible;
}

.key .icon-backspace {
	width: 2.15rem;
	height: 1.72rem;
}

.key .icon-negate {
	width: 1.85rem;
	height: 1.85rem;
}

.key-num {
	background: var(--calc-key-num);
	color: var(--calc-text);
}

.key-fn {
	background: var(--calc-key-fn);
	color: var(--calc-key-fn-text);
	font-size: clamp(1.7rem, 7vw, 2.05rem);
	font-weight: 500;
}

.key-fn svg {
	color: var(--calc-key-fn-text);
	stroke: currentColor;
}

.key-fn:active {
	filter: brightness(1.25);
}

.key-op {
	background: var(--calc-key-op);
	color: var(--calc-text);
	font-size: clamp(2.25rem, 9.2vw, 2.75rem);
	font-weight: 400;
}

.key-op > span {
	transform: translateY(-0.02em);
}

.key-op:active {
	filter: brightness(1.08);
}

/* ===== History sheet ===== */
.history-sheet {
	position: absolute;
	inset: 0;
	z-index: 40;
	pointer-events: none;
}

.history-sheet.is-open,
.history-sheet.is-closing {
	pointer-events: auto;
}

.history-backdrop {
	position: absolute;
	inset: 0;
	margin: 0;
	padding: 0;
	border: 0;
	background: rgba(0, 0, 0, 0.45);
	opacity: 0;
	cursor: pointer;
	transition: opacity 0.28s ease;
	pointer-events: none;
}

.history-sheet.is-open .history-backdrop,
.history-sheet.is-closing .history-backdrop {
	pointer-events: auto;
}

.history-sheet.is-open .history-backdrop {
	opacity: 1;
}

.history-slider {
	position: absolute;
	left: 0;
	right: 0;
	bottom: 0;
	height: min(70%, 30rem);
	transform: translateY(100%);
	transition: transform 0.36s cubic-bezier(0.22, 1, 0.36, 1);
	will-change: transform;
}

.history-sheet.is-open .history-slider {
	transform: translateY(0);
}

.history-sheet.is-closing .history-slider {
	transform: translateY(100%);
	transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

.history-panel {
	width: 100%;
	height: 100%;
	display: flex;
	flex-direction: column;
	border-radius: 1.15rem 1.15rem 0 0;
	background: #2c2c2e;
	box-shadow: 0 -8px 28px rgba(0, 0, 0, 0.35);
	overflow: hidden;
}

.history-handle {
	width: 2.25rem;
	height: 0.28rem;
	margin: 0.55rem auto 0.15rem;
	border-radius: 999px;
	background: var(--calc-sheet-handle);
	flex-shrink: 0;
}

.history-header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 0.35rem 1rem 0.55rem;
	flex-shrink: 0;
}

.history-edit {
	border: 0;
	background: transparent;
	color: var(--calc-text);
	font-size: 1.05rem;
	font-weight: 400;
	padding: 0.35rem 0.15rem;
	cursor: pointer;
	transition: color 0.15s ease;
}

.history-edit.is-editing {
	font-weight: 600;
}

.history-edit.is-delete {
	color: var(--calc-danger);
}

.history-close {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 1.7rem;
	height: 1.7rem;
	padding: 0;
	border: 0;
	border-radius: 50%;
	background: var(--calc-close-btn);
	color: var(--calc-text);
	cursor: pointer;
}

.history-close svg {
	width: 0.95rem;
	height: 0.95rem;
	fill: currentColor;
}

.history-body {
	flex: 1;
	min-height: 0;
	overflow-y: auto;
	padding: 0.15rem 0 1.4rem;
	-webkit-overflow-scrolling: touch;
}

.history-empty {
	padding: 2.5rem 1.25rem;
	text-align: center;
	color: var(--calc-sheet-muted);
	font-size: 0.95rem;
}

.history-empty.is-hidden,
.history-groups:empty + .history-empty {
	display: none;
}

.history-group-title {
	padding: 0.55rem 1.25rem 0.45rem;
	color: var(--calc-sheet-muted);
	font-size: 0.92rem;
	font-weight: 500;
}

.history-item {
	position: relative;
	display: flex;
	align-items: center;
	gap: 0.65rem;
	padding: 0.72rem 1.25rem 0.72rem 1.25rem;
	cursor: pointer;
	border-bottom: 1px solid var(--calc-sheet-divider);
	transition: padding-left 0.26s cubic-bezier(0.22, 1, 0.36, 1), background 0.15s ease;
}

.history-item:last-child {
	border-bottom: 0;
}

.history-item.is-latest {
	background: var(--calc-sheet-highlight);
}

.history-item-select {
	position: absolute;
	left: 1rem;
	top: 50%;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 1.4rem;
	height: 1.4rem;
	border-radius: 999px;
	border: 1.5px solid rgba(235, 235, 245, 0.35);
	box-sizing: border-box;
	background: transparent;
	color: transparent;
	opacity: 0;
	transform: translateY(-50%) scale(0.6);
	pointer-events: none;
	transition: opacity 0.2s ease, transform 0.26s cubic-bezier(0.22, 1, 0.36, 1),
		background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.history-item-select svg {
	width: 0.82rem;
	height: 0.82rem;
	fill: currentColor;
	flex-shrink: 0;
}

.history-sheet.is-editing .history-item {
	padding-left: 3.15rem;
	cursor: pointer;
}

.history-sheet.is-editing .history-item-select {
	opacity: 1;
	transform: translateY(-50%) scale(1);
}

.history-item.is-selected {
	background: rgba(255, 255, 255, 0.08);
}

.history-item.is-selected .history-item-select {
	background: #8e8e93;
	border-color: #8e8e93;
	color: #ffffff;
}

.history-item-main {
	flex: 1;
	min-width: 0;
	display: flex;
	flex-direction: column;
	align-items: flex-start;
	gap: 0.12rem;
}

.history-item-expr {
	color: var(--calc-sheet-muted);
	font-size: 0.92rem;
	font-weight: 400;
	line-height: 1.2;
	word-break: break-all;
}

.history-item-result {
	color: var(--calc-text);
	font-size: 1.55rem;
	font-weight: 400;
	line-height: 1.15;
	letter-spacing: -0.01em;
}