/* ============================================================
   Zahlenrätsel (spielid 30, Ordner rechenkreuz)
   Streng geometrisch: Rätselblatt in Papierweiß mit schwarzer Tinte
   wie in einer Rätselzeitschrift, eingebettet in einen ruhigen,
   dunkelgrünen Bananario-Rahmen. Reines DOM/CSS.
   ============================================================ */

.rk-spiel {
	--rk-tinte:   #16160f;
	--rk-papier:  #fffdf6;
	--rk-linie:   #d9d4c2;
	--rk-gruen:   #23934d;
	--rk-rot:     #cf3b3b;
	--rk-auswahl: #ffe36b;
	--rk-fest:    #dbeefe;
	position: relative;
	display: grid;
	grid-template-columns: minmax(0, 1.55fr) minmax(260px, 1fr);
	gap: 1.4rem;
	padding: 1.4rem;
	border-radius: var(--radius-big);
	background: linear-gradient(160deg, #1f5e38 0%, #173f28 60%, #10301e 100%);
	box-shadow: var(--shadow-lift);
}

/* ---------- Rätselblatt ---------- */

.rk-blatt-wrap {
	position: relative;
	min-width: 0;
	overflow: hidden;   /* das Raster passt sich erst nach dem Start an die Breite an */
	display: flex;
	flex-direction: column;
	padding: 1rem 1rem 1.1rem;
	border-radius: 6px;
	background: var(--rk-papier);
	box-shadow: 0 2px 0 rgba(0, 0, 0, .08), 0 14px 30px rgba(0, 0, 0, .35);
	min-height: 360px;
}
.rk-kopf {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: .5rem;
	padding-bottom: .6rem;
	margin-bottom: .4rem;
	border-bottom: 1px solid var(--rk-linie);
	font-size: .9rem;
	color: var(--ink-soft);
}
.rk-stufe-anzeige { font-weight: 700; color: var(--rk-tinte); text-transform: uppercase; letter-spacing: .1em; font-size: .78rem; }
.rk-uhr { font-variant-numeric: tabular-nums; font-size: 1.15rem; font-weight: 700; color: var(--rk-tinte); }

.rk-blatt {
	--rk-zelle: 40px;
	--rk-opb: 34px;
	--rk-luecke: 4px;
	--rk-s0: 3; --rk-s1: 3; --rk-s2: 3;
	flex: 1;
	display: grid;
	grid-template-columns:
		calc(var(--rk-s0) * (var(--rk-zelle) + var(--rk-luecke))) var(--rk-opb)
		calc(var(--rk-s1) * (var(--rk-zelle) + var(--rk-luecke))) var(--rk-opb)
		calc(var(--rk-s2) * (var(--rk-zelle) + var(--rk-luecke)));
	justify-content: center;
	align-content: center;
	row-gap: 4px;
	padding: .8rem 0;
	color: var(--rk-tinte);
}
.rk-zahl { display: flex; justify-content: flex-end; gap: var(--rk-luecke); }
.rk-zelle {
	position: relative;
	width: var(--rk-zelle);
	height: var(--rk-zelle);
	padding: 0;
	border: 2px solid var(--rk-tinte);
	border-radius: 3px;
	background: #fff;
	color: var(--rk-tinte);
	cursor: pointer;
	transition: background-color .12s;
}
.rk-zelle:hover { background: #fff8d6; }
.rk-zelle:focus-visible { outline: 3px solid var(--banana-dark); outline-offset: 2px; }
.rk-glyphe { position: absolute; inset: 12%; display: block; transition: inset .15s, opacity .15s; }
.rk-glyphe svg { display: block; width: 100%; height: 100%; }
.rk-wert {
	position: absolute;
	inset: 0;
	display: grid;
	place-items: center;
	font-size: calc(var(--rk-zelle) * .58);
	font-weight: 700;
	line-height: 1;
	font-variant-numeric: tabular-nums;
}
/* Belegt: Symbol rückt klein in die Ecke, die Ziffer steht groß in der Mitte. */
.rk-zelle.belegt .rk-glyphe { inset: 6% 72% 72% 6%; opacity: .75; }
.rk-zelle.belegt .rk-wert { padding: 16% 0 0 18%; font-size: calc(var(--rk-zelle) * .52); }
.rk-zelle.gewaehlt { background: var(--rk-auswahl); }
.rk-zelle.fest { background: var(--rk-fest); cursor: default; }

.rk-op, .rk-gl {
	display: grid;
	place-items: center;
	font-size: calc(var(--rk-zelle) * .62);
	font-weight: 700;
	line-height: 1;
	transition: color .15s;
}
.rk-op-v { height: calc(var(--rk-zelle) * .8); }
.rk-op.ok, .rk-gl.ok { color: var(--rk-gruen); }
.rk-op.falsch, .rk-gl.falsch { color: var(--rk-rot); }

/* Der dicke Strich steht für "=" der drei Spalten; jeder Abschnitt zeigt den Zustand seiner Spalte. */
.rk-strich {
	grid-column: 1 / -1;
	display: grid;
	grid-template-columns: subgrid;
	margin: 6px 0;
	height: 4px;
	background: var(--rk-tinte);
}
.rk-strich span { transition: background-color .15s; }
.rk-strich span.ok { background: var(--rk-gruen); }
.rk-strich span.falsch { background: var(--rk-rot); }

.rk-meldung {
	min-height: 1.4em;
	margin: .4rem 0 0;
	text-align: center;
	font-size: .95rem;
	color: var(--ink-soft);
}
.rk-meldung-warn { color: var(--rk-rot); }
.rk-meldung-ok { color: var(--rk-gruen); font-weight: 700; }

.rk-fertig .rk-zelle { cursor: default; }
.rk-fertig .rk-zelle:hover { background: #fff; }
.rk-fertig .rk-zelle.fest:hover { background: var(--rk-fest); }

/* ---------- Startauswahl ---------- */

.rk-start {
	position: absolute;
	inset: 0;
	z-index: 3;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	gap: .8rem;
	padding: 1.2rem;
	border-radius: 6px;
	background: rgba(255, 253, 246, .94);
	text-align: center;
}
.rk-start[hidden] { display: none; }
.rk-start-titel { margin: 0; font-size: 1.3rem; font-weight: 700; color: var(--rk-tinte); }
.rk-start-knoepfe { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .6rem; width: min(520px, 100%); }
.rk-stufe-knopf {
	display: grid;
	gap: .2rem;
	padding: .9rem .5rem;
	border: 2px solid var(--rk-tinte);
	border-radius: 6px;
	background: #fff;
	color: var(--rk-tinte);
	cursor: pointer;
	font: inherit;
	transition: transform .12s, background-color .12s;
}
.rk-stufe-knopf b { font-size: 1.1rem; }
.rk-stufe-knopf span { font-size: .78rem; color: var(--ink-soft); }
.rk-stufe-knopf:hover { background: var(--rk-auswahl); transform: translateY(-2px); }
.rk-start-info { margin: 0; font-size: .82rem; color: var(--ink-soft); max-width: 420px; }
/* Nach dem Ende: Auswahl unter dem Blatt statt darüber, damit die Lösung sichtbar bleibt. */
.rk-start.rk-start-klein { position: static; padding: .8rem 0 0; margin-top: .6rem; background: none; border-top: 1px solid var(--rk-linie); border-radius: 0; }
.rk-start.rk-start-klein .rk-start-titel { font-size: 1rem; }
.rk-start.rk-start-klein .rk-start-info { display: none; }

/* ---------- Seitenleiste ---------- */

.rk-seite { display: flex; flex-direction: column; gap: .8rem; color: #fff; }
.rk-seite-titel { margin: 0; font-size: 1.2rem; color: #fff; }
.rk-seite-hilfe { margin: -.4rem 0 0; font-size: .82rem; color: rgba(255, 255, 255, .72); }

.rk-legende { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: .45rem; }
.rk-leg {
	display: grid;
	grid-template-columns: 1fr 1fr;
	align-items: center;
	gap: .3rem;
	padding: .4rem;
	border: 2px solid transparent;
	border-radius: 8px;
	background: var(--rk-papier);
	color: var(--rk-tinte);
	cursor: pointer;
	font: inherit;
}
.rk-leg-glyphe { display: block; aspect-ratio: 1; }
.rk-leg-glyphe svg { display: block; width: 100%; height: 100%; }
.rk-leg-wert { font-size: 1.25rem; font-weight: 700; text-align: center; font-variant-numeric: tabular-nums; color: #b8b29c; }
.rk-leg.belegt .rk-leg-wert { color: var(--rk-tinte); }
.rk-leg.gewaehlt { border-color: var(--banana-dark); background: var(--rk-auswahl); }
.rk-leg.fest { position: relative; border-color: #5b9bd5; background: var(--rk-fest); cursor: default; }
.rk-leg.fest::after { content: '💡'; position: absolute; top: -8px; right: -6px; font-size: .8rem; }
.rk-leg:focus-visible { outline: 3px solid var(--banana); outline-offset: 2px; }

.rk-ziffern { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: .45rem; }
.rk-ziffern button {
	position: relative;
	min-height: 48px;
	border: 0;
	border-radius: 8px;
	background: rgba(255, 255, 255, .14);
	color: #fff;
	font: inherit;
	font-size: 1.35rem;
	font-weight: 700;
	cursor: pointer;
	transition: background-color .12s, transform .08s;
}
.rk-ziffern button:hover { background: rgba(255, 255, 255, .26); }
.rk-ziffern button:active { transform: scale(.95); }
.rk-ziffern button.vergeben { background: rgba(255, 255, 255, .06); color: rgba(255, 255, 255, .55); }
.rk-ziffern .rk-taste-weg { background: rgba(207, 59, 59, .35); }
.rk-mini { position: absolute; right: 4px; bottom: 4px; width: 13px; height: 13px; color: var(--banana); }
.rk-mini svg { display: block; width: 100%; height: 100%; }

.rk-werkzeug { display: flex; flex-wrap: wrap; gap: .45rem; }
.rk-werkzeug .btn { flex: 1 1 auto; }
.rk-werkzeug .btn:disabled { opacity: .45; cursor: default; }
.rk-bl-link { align-self: stretch; text-align: center; }

/* ---------- Ergebnis ---------- */

.rk-ergebnis {
	position: fixed;
	inset: 0;
	z-index: 1000;
	display: grid;
	place-items: center;
	padding: 1rem;
	background: rgba(10, 30, 18, .62);
	backdrop-filter: blur(3px);
	animation: rk-einblenden .3s both;
}
.rk-ergebnis[hidden] { display: none; }
@keyframes rk-einblenden { from { opacity: 0; } }
.rk-ergebnis-karte {
	width: min(440px, 100%);
	padding: 1.6rem 1.4rem 1.3rem;
	border-radius: var(--radius-big);
	background: linear-gradient(var(--sand), #fff);
	box-shadow: 0 24px 60px rgba(0, 0, 0, .45);
	text-align: center;
	animation: rk-hoch .45s cubic-bezier(.2, 1.4, .4, 1) both;
}
@keyframes rk-hoch { from { transform: translateY(30px) scale(.9); opacity: 0; } }
.rk-ergebnis-icon { font-size: 3.4rem; line-height: 1; }
.rk-ergebnis-karte h2 { margin: .4rem 0 .1rem; font-size: 1.9rem; }
.rk-ergebnis-unter { margin: 0 0 1rem; color: var(--ink-soft); }
.rk-ergebnis-werte { display: grid; grid-template-columns: repeat(3, 1fr); gap: .5rem; margin-bottom: .8rem; }
.rk-ergebnis-werte div { display: grid; padding: .6rem .3rem; border-radius: 14px; background: #fff; box-shadow: var(--shadow); }
.rk-ergebnis-werte span { font-size: .75rem; text-transform: uppercase; letter-spacing: .08em; color: var(--ink-soft); }
.rk-ergebnis-werte b { font-size: 1.35rem; font-variant-numeric: tabular-nums; }
.rk-ergebnis-info { min-height: 1.2em; margin: 0 0 1rem; font-size: .92rem; }
.rk-ergebnis-knoepfe { display: flex; flex-wrap: wrap; justify-content: center; gap: .5rem; }

.rk-regeln { max-width: 760px; margin: 2rem auto 0; }

/* ---------- Mobil ---------- */

@media (max-width: 860px) {
	.rk-spiel { grid-template-columns: minmax(0, 1fr); padding: .8rem; gap: 1rem; }
	.rk-blatt-wrap { padding: .7rem .4rem .8rem; min-height: 300px; }
}
@media (max-width: 480px) {
	.rk-start-knoepfe { grid-template-columns: 1fr; }
	.rk-legende { gap: .35rem; }
	.rk-leg { padding: .3rem; }
	.rk-leg-wert { font-size: 1.05rem; }
	.rk-ziffern button { min-height: 44px; font-size: 1.2rem; }
}

/* ---------- Installierbare App (body.app-modus, inc/app.php) ----------
   Alles auf EINEM Bildschirm, der Body scrollt in der App nicht
   (css/app.css). Oben das Rätselblatt (nimmt den Rest der Höhe), darunter
   Zuordnung, Ziffern und Werkzeug. Die Zellgröße rechnet rechenkreuz.js
   aus Breite UND Höhe des Blatts (groesseAnpassen()). */
body.app-modus { background: #173f28; }
body.app-modus .section {
	max-width: none;
	margin: 0;
	padding: env(safe-area-inset-top, 0px) env(safe-area-inset-right, 0px) env(safe-area-inset-bottom, 0px) env(safe-area-inset-left, 0px);
	height: 100dvh;
	display: flex;
	flex-direction: column;
	box-sizing: border-box;
}
body.app-modus .rk-spiel {
	flex: 1;
	min-height: 0;
	grid-template-columns: minmax(0, 1fr);
	grid-template-rows: minmax(0, 1fr) auto;
	gap: .55rem;
	padding: .5rem;
	border-radius: 0;
	box-shadow: none;
}
body.app-modus .rk-blatt-wrap { min-height: 0; padding: .55rem .5rem .5rem; }
/* Rechts oben liegt der ☰-Knopf der App über dem Kopf des Blatts. */
body.app-modus .rk-kopf { padding-right: 48px; padding-bottom: .4rem; }
body.app-modus .rk-blatt { min-height: 0; padding: .3rem 0; }
body.app-modus .rk-meldung { margin-top: .2rem; font-size: .88rem; }
body.app-modus .rk-seite { gap: .5rem; }
body.app-modus .rk-seite-titel,
body.app-modus .rk-seite-hilfe { display: none; }
body.app-modus .rk-legende { gap: .35rem; }
body.app-modus .rk-leg { padding: .28rem .35rem; }
body.app-modus .rk-ziffern { gap: .35rem; }
body.app-modus .rk-ziffern button { min-height: 44px; }
body.app-modus .rk-werkzeug .btn { padding: .45rem .6rem; }
body.app-modus .rk-start-knoepfe { grid-template-columns: 1fr; }

@media (prefers-reduced-motion: reduce) {
	.rk-ergebnis, .rk-ergebnis-karte, .rk-glyphe, .rk-stufe-knopf { animation: none; transition: none; }
}