/*
 * WSC Scientific Calculator – Stylesheet
 * Vollständig gekapselt unter .wsc-calculator, damit keine Konflikte
 * mit dem aktiven WordPress-Theme entstehen. Es werden keine externen
 * Schriftarten geladen – die Typografie wird vom Theme übernommen.
 */

.wsc-calculator {
	/* --- Design-Tokens (max. 2 Hauptfarben + neutrale Grautöne) --- */
	--wsc-color-primary: #3452ff;      /* Hauptfarbe 1: gedecktes Blau (Aktionen, Fokus) */
	--wsc-color-primary-dark: #0e2bcf;
	--wsc-color-accent: #3452ff;       /* Hauptfarbe 2: warmes Amber (Ergebnis / Gleich) */
	--wsc-color-accent-dark: #0624d1;

	--wsc-color-bg: #ffffff;
	--wsc-color-panel: #f7f8fa;
	--wsc-color-border: #e3e4eb;
	--wsc-color-border-strong: #cdd3db;
	--wsc-color-text: #1a2027;
	--wsc-color-text-secondary: #667085;
	--wsc-color-key-bg: #ffffff;
	--wsc-color-key-hover: #ededff;
	--wsc-color-danger: #3452ff;
	--wsc-color-danger-bg: #eaedff;

	--wsc-radius-sm: 6px;
	--wsc-radius-md: 10px;
	--wsc-radius-lg: 16px;
	--wsc-space-1: 4px;
	--wsc-space-2: 8px;
	--wsc-space-3: 12px;
	--wsc-space-4: 16px;
	--wsc-space-5: 24px;

	/* Isolierung: eigene Box-Sizing-Basis, ohne globale Regeln zu setzen */
	box-sizing: border-box;
	display: flex;
	flex-direction: column;
	align-items: stretch;
	gap: var(--wsc-space-4);
	max-width: 420px;
	margin: 0 auto;
	color: var(--wsc-color-text);
	font-family: inherit; /* Theme-Typografie übernehmen */
	line-height: 1.4;
	transition: max-width 0.15s ease;
}

.wsc-calculator *,
.wsc-calculator *::before,
.wsc-calculator *::after {
	box-sizing: border-box;
}

.wsc-calc__panel {
	flex: 1 1 auto;
	min-width: 0;
	background: var(--wsc-color-bg);
	border: 1px solid var(--wsc-color-border);
	border-radius: var(--wsc-radius-lg);
	padding: var(--wsc-space-4);
	box-shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 4px 16px rgba(16, 24, 40, 0.04);
}

/* --- Statusleiste --- */
.wsc-calc__statusbar {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: var(--wsc-space-2);
	margin-bottom: var(--wsc-space-3);
}

.wsc-calc__chip {
	font-family: inherit;
	font-size: 0.75rem;
	font-weight: 600;
	letter-spacing: 0.02em;
	color: var(--wsc-color-text-secondary);
	background: var(--wsc-color-panel);
	border: 1px solid var(--wsc-color-border);
	border-radius: 999px;
	padding: var(--wsc-space-1) var(--wsc-space-3);
	cursor: pointer;
	transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.wsc-calc__chip:hover {
	background: var(--wsc-color-key-hover);
}

.wsc-calc__chip[aria-pressed="true"] {
	background: var(--wsc-color-primary);
	border-color: var(--wsc-color-primary);
	color: #ffffff;
}

.wsc-calc__memory-indicator {
	margin-left: auto;
	font-size: 0.75rem;
	font-weight: 700;
	color: var(--wsc-color-accent-dark);
	background: rgba(62, 41, 217, 0.12);
	border-radius: 999px;
	width: 22px;
	height: 22px;
	display: inline-flex;
	align-items: center;
	justify-content: center;
}

/* --- Anzeige --- */
.wsc-calc__display {
	background: var(--wsc-color-panel);
	border: 1px solid var(--wsc-color-border);
	border-radius: var(--wsc-radius-md);
	padding: var(--wsc-space-4) var(--wsc-space-4) var(--wsc-space-3);
	margin-bottom: var(--wsc-space-4);
	text-align: right;
	min-height: 92px;
	display: flex;
	flex-direction: column;
	justify-content: flex-end;
	gap: var(--wsc-space-1);
}

.wsc-calc__expression {
	font-size: 0.95rem;
	color: var(--wsc-color-text-secondary);
	min-height: 1.3em;
	word-break: break-word;
	overflow-wrap: anywhere;
}

.wsc-calc__result {
	font-size: 2rem;
	font-weight: 600;
	color: var(--wsc-color-text);
	word-break: break-word;
	overflow-wrap: anywhere;
	outline-offset: 2px;
}

.wsc-calc__result:focus-visible,
.wsc-calc__key:focus-visible,
.wsc-calc__chip:focus-visible {
	outline: 2px solid var(--wsc-color-primary);
	outline-offset: 2px;
}

.wsc-calc__error {
	margin: var(--wsc-space-1) 0 0;
	font-size: 0.8125rem;
	font-weight: 600;
	color: var(--wsc-color-danger);
	text-align: left;
	min-height: 1em;
}

.wsc-calc__error:empty {
	display: none;
}

/* --- Tastenfeld --- */
.wsc-calc__keys {
	display: grid;
	grid-template-columns: repeat(5, 1fr);
	gap: var(--wsc-space-2);
}

.wsc-calc__key {
	font-family: inherit;
	font-size: 1rem;
	font-weight: 500;
	color: var(--wsc-color-text);
	background: var(--wsc-color-key-bg);
	border: 1px solid var(--wsc-color-border);
	border-radius: var(--wsc-radius-sm);
	padding: var(--wsc-space-3) var(--wsc-space-1);
	cursor: pointer;
	transition: background-color 0.12s ease, border-color 0.12s ease, transform 0.05s ease;
	min-height: 44px;
}

.wsc-calc__key:hover {
	background: var(--wsc-color-key-hover);
	border-color: var(--wsc-color-border-strong);
}

.wsc-calc__key:active {
	transform: scale(0.97);
}

.wsc-calc__key--digit {
	font-weight: 600;
	font-size: 1.0625rem;
}

.wsc-calc__key--fn {
	font-size: 0.875rem;
	color: var(--wsc-color-text-secondary);
}

.wsc-calc__key--op {
	color: var(--wsc-color-primary-dark);
	font-weight: 600;
	background: #eef3fa;
	border-color: #dce7f5;
}

.wsc-calc__key--op:hover {
	background: #e2ecf9;
}

.wsc-calc__key--equals {
	background: var(--wsc-color-accent);
	border-color: var(--wsc-color-accent);
	color: #ffffff;
	font-weight: 700;
}

.wsc-calc__key--equals:hover {
	background: var(--wsc-color-accent-dark);
	border-color: var(--wsc-color-accent-dark);
}

.wsc-calc__key--clear {
	color: var(--wsc-color-danger);
	border-color: #dfe2ff;
	background: var(--wsc-color-danger-bg);
	font-weight: 600;
}

.wsc-calc__key--clear:hover {
	background: #f2f3ff;
}

.wsc-calc__key--mem {
	font-size: 0.8125rem;
	color: var(--wsc-color-text-secondary);
}

.wsc-calc__key--wide {
	text-align: left;
	padding-left: var(--wsc-space-4);
}

.wsc-calc__key--span-rows {
	grid-row: span 2;
	min-height: 100%;
}

.wsc-calc__key--span-cols {
	grid-column: span 2;
}

/* --- Fußzeile --- */
.wsc-calc__footer {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: var(--wsc-space-2);
	margin-top: var(--wsc-space-2);
}

.wsc-calc__key--secondary {
	font-size: 0.8125rem;
	color: var(--wsc-color-text-secondary);
}

/* --- Zweitfunktionen aktiv --- */
.wsc-calculator.wsc-calc--second-active .wsc-calc__chip[data-action="toggle-second"] {
	background: var(--wsc-color-primary);
	border-color: var(--wsc-color-primary);
	color: #ffffff;
}

/* --- Verlauf --- */
.wsc-calc__history {
	flex: 1 1 auto;
	min-width: 0;
	display: flex;
	flex-direction: column;
	background: var(--wsc-color-bg);
	border: 1px solid var(--wsc-color-border);
	border-radius: var(--wsc-radius-lg);
	padding: var(--wsc-space-4);
	box-shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 4px 16px rgba(16, 24, 40, 0.04);
}

.wsc-calc__history-header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--wsc-space-2);
	margin-bottom: var(--wsc-space-2);
}

.wsc-calc__history-title {
	margin: 0;
	font-size: 0.8125rem;
	font-weight: 700;
	text-transform: uppercase;
	letter-spacing: 0.04em;
	color: var(--wsc-color-text-secondary);
}

.wsc-calc__history-clear {
	font-family: inherit;
	font-size: 0.75rem;
	font-weight: 600;
	color: var(--wsc-color-text-secondary);
	background: transparent;
	border: 1px solid var(--wsc-color-border);
	border-radius: var(--wsc-radius-sm);
	padding: var(--wsc-space-1) var(--wsc-space-2);
	cursor: pointer;
	transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

.wsc-calc__history-clear:hover {
	color: var(--wsc-color-danger);
	border-color: #f0d3d0;
	background: var(--wsc-color-danger-bg);
}

.wsc-calc__history-empty {
	margin: 0;
	font-size: 0.8125rem;
	color: var(--wsc-color-text-secondary);
	font-style: italic;
}

.wsc-calc__history-list {
	list-style: none;
	margin: 0;
	padding: 0;
	flex: 1 1 auto;
	max-height: 220px;
	overflow-y: auto;
}

.wsc-calc__history-item + .wsc-calc__history-item {
	border-top: 1px solid var(--wsc-color-border);
}

.wsc-calc__history-entry {
	width: 100%;
	display: flex;
	align-items: baseline;
	justify-content: space-between;
	gap: var(--wsc-space-2);
	font-family: inherit;
	text-align: left;
	background: transparent;
	border: 0;
	border-radius: var(--wsc-radius-sm);
	padding: var(--wsc-space-2);
	cursor: pointer;
	transition: background-color 0.12s ease;
}

.wsc-calc__history-entry:hover {
	background: var(--wsc-color-key-hover);
}

.wsc-calc__history-expr {
	font-size: 0.8125rem;
	color: var(--wsc-color-text-secondary);
	overflow-wrap: anywhere;
}

.wsc-calc__history-result {
	font-size: 0.9375rem;
	font-weight: 600;
	color: var(--wsc-color-primary-dark);
	white-space: nowrap;
	overflow-wrap: anywhere;
}

/* Ab ausreichender Breite steht der Verlauf neben dem Rechner statt darunter. */
@media (min-width: 700px) {
	.wsc-calculator.wsc-calc--history-open {
		flex-direction: row;
		align-items: stretch;
	}

	.wsc-calculator.wsc-calc--history-open .wsc-calc__panel {
		flex: 0 1 420px;
	}

	.wsc-calculator.wsc-calc--history-open .wsc-calc__history {
		flex: 1 1 260px;
		max-width: 300px;
	}

	.wsc-calculator.wsc-calc--history-open .wsc-calc__history-list {
		max-height: none;
	}
}

/* --- Barrierefreiheit: nur für Screenreader --- */
.wsc-calc__visually-hidden {
	position: absolute;
	width: 1px;
	height: 1px;
	padding: 0;
	margin: -1px;
	overflow: hidden;
	clip: rect(0, 0, 0, 0);
	white-space: nowrap;
	border: 0;
}

/* --- Fehlerzustand der Anzeige --- */
.wsc-calculator.wsc-calc--has-error .wsc-calc__display {
	border-color: var(--wsc-color-danger);
}

/* --- Responsive Anpassungen --- */
@media (max-width: 480px) {
	.wsc-calculator {
		max-width: 100%;
	}

	.wsc-calc__panel {
		padding: var(--wsc-space-3);
		border-radius: var(--wsc-radius-md);
	}

	.wsc-calc__result {
		font-size: 1.65rem;
	}

	.wsc-calc__key {
		min-height: 40px;
		padding: var(--wsc-space-2) var(--wsc-space-1);
		font-size: 0.9375rem;
	}

	.wsc-calc__key--fn,
	.wsc-calc__key--mem {
		font-size: 0.75rem;
	}
}

@media (min-width: 700px) {
	.wsc-calculator {
		max-width: 460px;
	}

	.wsc-calculator.wsc-calc--history-open {
		max-width: 760px;
	}
}

/* --- Reduzierte Bewegung respektieren --- */
@media (prefers-reduced-motion: reduce) {
	.wsc-calculator .wsc-calc__key,
	.wsc-calculator .wsc-calc__chip {
		transition: none;
	}
}