/* ==========================================================================
   Rose Richter-Armgart – Stylesheet
   Reine Galerie-Ästhetik: viel Weiß, die Bilder tragen die Seite.
   ========================================================================== */

:root {
	--bg:        #ffffff;
	--ink:       #16161a;
	--muted:     #82828a;
	--line:      #e8e8e8;
	--line-soft: #f2f2f2;

	--head-h:    76px;
	--pad:       clamp(20px, 4vw, 56px);
	--max:       1560px;

	--ls-wide:   0.22em;
	--ease:      cubic-bezier(.22, .61, .36, 1);
}

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
	margin: 0;
	overflow-x: hidden;
	background: var(--bg);
	color: var(--ink);
	font-family: "Helvetica Neue", Helvetica, -apple-system, BlinkMacSystemFont,
	             "Segoe UI", Arial, sans-serif;
	font-size: 16px;
	line-height: 1.6;
	-webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a   { color: inherit; text-decoration: none; }

/* Sichtbarer Fokus für Tastatur-Bedienung. */
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--pad); }

/* Nur für Screenreader. */
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* --------------------------------------------------------------- Kopfzeile */

.site-head {
	position: sticky; top: 0; z-index: 60;
	background: rgba(255, 255, 255, .92);
	backdrop-filter: saturate(180%) blur(12px);
	border-bottom: 1px solid transparent;
	transition: border-color .3s var(--ease);
}
.site-head.is-stuck { border-bottom-color: var(--line); }

.head-inner {
	max-width: var(--max); margin: 0 auto; padding: 0 var(--pad);
	min-height: var(--head-h);
	display: flex; align-items: center; gap: 20px;
}

.brand { display: flex; align-items: center; gap: 14px; margin-right: auto; min-width: 0; }
.brand svg, .brand img { width: 40px; height: auto; flex: none; }
.brand-name {
	font-size: clamp(13px, 1.5vw, 17px);
	letter-spacing: var(--ls-wide);
	text-transform: uppercase;
	white-space: nowrap;
	font-weight: 400;
}

.nav { display: flex; align-items: center; gap: clamp(14px, 2vw, 30px); }
.nav a {
	font-size: 13px;
	letter-spacing: .13em;
	text-transform: uppercase;
	color: var(--muted);
	padding: 6px 0;
	border-bottom: 1px solid transparent;
	transition: color .2s var(--ease), border-color .2s var(--ease);
}
.nav a:hover           { color: var(--ink); }
.nav a[aria-current]   { color: var(--ink); border-bottom-color: var(--ink); }

/* Burger-Schalter – nur auf schmalen Schirmen sichtbar. */
.burger {
	display: none; width: 40px; height: 40px; padding: 0;
	background: none; border: 0; cursor: pointer;
}
.burger span {
	display: block; width: 22px; height: 1.5px; margin: 5px auto;
	background: var(--ink);
	transition: transform .3s var(--ease), opacity .2s var(--ease);
}
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

@media (max-width: 900px) {
	.burger { display: block; }
	.nav {
		position: fixed; inset: var(--head-h) 0 auto 0;
		flex-direction: column; align-items: stretch; gap: 0;
		background: var(--bg);
		border-bottom: 1px solid var(--line);
		padding: 8px var(--pad) 24px;
		transform: translateY(-8px);
		opacity: 0; pointer-events: none;
		transition: opacity .25s var(--ease), transform .25s var(--ease);
	}
	.nav.is-open { opacity: 1; transform: none; pointer-events: auto; }
	.nav a { font-size: 15px; padding: 14px 0; border-bottom: 1px solid var(--line-soft); }
	.nav a[aria-current] { border-bottom-color: var(--ink); }
}

@media (max-width: 520px) {
	:root { --head-h: 64px; }
	.brand { gap: 9px; }
	.brand svg, .brand img { width: 28px; }
	.brand-name { font-size: 11.5px; letter-spacing: .1em; }
}

@media (max-width: 360px) {
	.brand-name { font-size: 10.5px; letter-spacing: .06em; }
}

/* ------------------------------------------------------------------ Inhalt */

main { padding-bottom: clamp(60px, 10vw, 140px); }

.page-head { padding: clamp(36px, 6vw, 80px) 0 clamp(24px, 3vw, 40px); }
.page-title {
	margin: 0;
	font-size: clamp(26px, 4vw, 44px);
	font-weight: 300;
	letter-spacing: .06em;
	text-transform: uppercase;
}
.page-lede { margin: 14px 0 0; max-width: 62ch; color: var(--muted); }

/* --------------------------------------------------------------- Startseite */

.hero {
	position: relative;
	height: calc(100svh - var(--head-h));
	min-height: 420px;
	overflow: hidden;
	background: var(--line-soft);
}
.hero img {
	width: 100%; height: 100%;
	object-fit: cover; object-position: center;
	opacity: 0;
	transition: opacity .45s var(--ease);
}
.hero img.is-ready { opacity: 1; }
.hero-cap {
	position: absolute; left: var(--pad); bottom: clamp(20px, 4vw, 44px);
	margin: 0;
	color: #fff;
	font-size: 12px; letter-spacing: .16em; text-transform: uppercase;
	text-shadow: 0 1px 14px rgba(0, 0, 0, .55);
}
.hero-cap b { font-weight: 600; }

/* ------------------------------------------------------------- Jahres-Leiste */

.yearbar {
	position: sticky; top: var(--head-h); z-index: 50;
	background: rgba(255, 255, 255, .94);
	backdrop-filter: saturate(180%) blur(12px);
	border-bottom: 1px solid var(--line);
}
.yearbar-inner {
	max-width: var(--max); margin: 0 auto; padding: 12px var(--pad);
	display: flex; gap: 8px;
	overflow-x: auto;
	scrollbar-width: none;
}
.yearbar-inner::-webkit-scrollbar { display: none; }
.yearbar a {
	flex: none;
	font-size: 13px; letter-spacing: .08em;
	color: var(--muted);
	padding: 4px 10px;
	border-radius: 999px;
	transition: color .2s var(--ease), background .2s var(--ease);
}
.yearbar a:hover      { color: var(--ink); background: var(--line-soft); }
.yearbar a.is-active  { color: var(--bg); background: var(--ink); }

/* ------------------------------------------------------------- Bilder-Raster */

.year-block { padding-top: clamp(34px, 5vw, 64px); scroll-margin-top: calc(var(--head-h) + 62px); }
.year-label {
	margin: 0 0 22px;
	font-size: 13px; letter-spacing: .2em; font-weight: 400;
	color: var(--muted);
	padding-bottom: 10px;
	border-bottom: 1px solid var(--line);
}

/* Mauerwerk-Raster über CSS-Spalten: die Bildhöhen dürfen frei laufen. */
.grid { columns: 3; column-gap: clamp(18px, 2.4vw, 36px); }
@media (max-width: 1240px) { .grid { columns: 3; } }
@media (max-width: 980px)  { .grid { columns: 2; } }
@media (max-width: 560px)  { .grid { columns: 1; } }
@media (min-width: 1700px) { .grid { columns: 4; } }

.tile {
	break-inside: avoid;
	margin: 0 0 clamp(24px, 3vw, 44px);
	-webkit-column-break-inside: avoid;
}
.tile button {
	display: block; width: 100%; padding: 0;
	background: none; border: 0; cursor: zoom-in;
	font: inherit; color: inherit; text-align: left;
}
.tile-img {
	display: block;
	position: relative;
	background: var(--line-soft);
	overflow: hidden;
}
.tile-img img {
	width: 100%;
	/* Bilder sind von Haus aus sichtbar. Das Einblenden ist nur Zierde und
	   darf nie dazu führen, dass ein Bild unsichtbar hängen bleibt. */
	opacity: 1;
	transition: opacity .45s var(--ease), transform .6s var(--ease);
}
@media (scripting: enabled) {
	.tile-img img:not(.is-geladen) { opacity: 0; }
}
.tile button:hover .tile-img img { transform: scale(1.022); }

.tile-cap { padding-top: 12px; font-size: 14px; line-height: 1.45; }
.tile-cap b     { font-weight: 600; }
.tile-cap .dim  { display: block; color: var(--muted); font-size: 13px; }

/* ---------------------------------------------------------- Ausstellungen */

.exlist {
	display: grid;
	align-items: start;
	gap: clamp(28px, 3.4vw, 48px);
	grid-template-columns: repeat(3, 1fr);
}
@media (max-width: 1100px) { .exlist { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px)  { .exlist { grid-template-columns: 1fr; } }

.excard { display: flex; flex-direction: column; }
.excard button, .excard .plain {
	display: block; width: 100%; padding: 0; text-align: left;
	background: none; border: 0; font: inherit; color: inherit;
}
.excard button { cursor: pointer; }

.excover {
	display: block;
	position: relative;
	aspect-ratio: 4 / 3;
	background: var(--line-soft);
	overflow: hidden;
}
.excover img {
	width: 100%; height: 100%;
	object-fit: cover;
	opacity: 1;
	transition: opacity .45s var(--ease), transform .6s var(--ease);
}
@media (scripting: enabled) {
	.excover img:not(.is-geladen) { opacity: 0; }
}
.excard button:hover .excover img { transform: scale(1.035); }

/* Platzhalter für Ausstellungen ohne Bildmaterial. */
.excover.is-empty {
	display: flex; align-items: center; justify-content: center;
	border: 1px solid var(--line); background: var(--bg);
	color: var(--muted); font-size: 12px; letter-spacing: .16em; text-transform: uppercase;
}

.excount {
	position: absolute; z-index: 1; right: 10px; bottom: 10px;
	background: rgba(0, 0, 0, .62); color: #fff;
	font-size: 11px; letter-spacing: .1em;
	padding: 4px 9px; border-radius: 999px;
}

.exmeta { padding-top: 14px; }
.exyear { font-size: 12px; letter-spacing: .18em; color: var(--muted); }
.extitle { margin: 5px 0 2px; font-size: 17px; font-weight: 500; letter-spacing: .02em; }
.exvenue { margin: 0; color: var(--muted); font-size: 14px; }

/* -------------------------------------------------------------- Vita / Text */

.prose { max-width: 900px; }
.prose h2 {
	margin: clamp(40px, 5vw, 64px) 0 20px;
	font-size: 13px; font-weight: 400; letter-spacing: .2em; text-transform: uppercase;
	color: var(--muted);
	padding-bottom: 10px; border-bottom: 1px solid var(--line);
}
.prose h2:first-child { margin-top: 0; }

.portrait { margin-bottom: clamp(30px, 4vw, 52px); max-width: 460px; }

.cv { display: grid; grid-template-columns: 130px 1fr; gap: 4px 26px; }
.cv dt { color: var(--muted); font-size: 14px; padding-top: 2px; }
.cv dd { margin: 0 0 18px; }
.cv dd p { margin: 0 0 4px; }
@media (max-width: 620px) {
	.cv { grid-template-columns: 1fr; gap: 0; }
	.cv dt { font-size: 12px; letter-spacing: .14em; margin-top: 14px; }
	.cv dd { margin-bottom: 12px; }
}

.cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(24px, 3vw, 44px); }
@media (max-width: 720px) { .cards { grid-template-columns: 1fr; } }
.card { border-top: 1px solid var(--line); padding-top: 18px; }
.card h3 { margin: 0 0 8px; font-size: 15px; font-weight: 600; letter-spacing: .04em; }
.card p  { margin: 0 0 6px; }
.card .note { color: var(--muted); font-size: 14px; }
.card a:hover { text-decoration: underline; }

/* ------------------------------------------------------------------ Lightbox */

.lb {
	position: fixed; inset: 0; z-index: 200;
	background: rgba(12, 12, 14, .97);
	display: none;
	touch-action: none;
}
.lb.is-open { display: block; }
body.lb-lock { overflow: hidden; }

.lb-stage {
	position: absolute; inset: 0 0 88px;
	display: flex; align-items: center; justify-content: center;
	padding: clamp(16px, 4vw, 60px);
}
.lb-stage img {
	max-width: 100%; max-height: 100%;
	object-fit: contain;
	opacity: 0;
	transition: opacity .3s var(--ease);
}
.lb-stage img.is-ready { opacity: 1; }

.lb-foot {
	position: absolute; left: 0; right: 0; bottom: 0;
	min-height: 88px;
	display: flex; align-items: center; justify-content: center;
	padding: 16px clamp(60px, 12vw, 130px);
	color: #f2f2f2; text-align: center;
}
.lb-cap  { font-size: 14px; line-height: 1.5; }
.lb-cap b { font-weight: 600; }
.lb-cap .dim { display: block; margin-top: 2px; color: #a9a9b0; }
.lb-num {
	position: absolute; right: clamp(16px, 3vw, 28px); bottom: 20px;
	color: #86868e; font-size: 12px; letter-spacing: .12em;
}

.lb-btn {
	position: absolute; z-index: 2;
	background: none; border: 0; cursor: pointer;
	color: #fff; opacity: .68;
	width: 56px; height: 56px;
	display: flex; align-items: center; justify-content: center;
	transition: opacity .2s var(--ease);
}
.lb-btn:hover { opacity: 1; }
.lb-btn svg { width: 26px; height: 26px; fill: none; stroke: currentColor; stroke-width: 1.4; }
.lb-close { top: 10px; right: 10px; }
.lb-prev  { top: 50%; left: 6px;  transform: translateY(-50%); }
.lb-next  { top: 50%; right: 6px; transform: translateY(-50%); }
.lb-btn[hidden] { display: none; }

@media (max-width: 640px) {
	.lb-prev, .lb-next { top: auto; bottom: 96px; transform: none; }
	.lb-foot { padding-left: 20px; padding-right: 20px; }
	.lb-num  { bottom: 6px; }
}

/* --------------------------------------------------------------- Zustände */

.state {
	padding: clamp(50px, 9vw, 110px) 0;
	text-align: center; color: var(--muted); font-size: 14px;
	letter-spacing: .1em; text-transform: uppercase;
}
.state.is-error { color: #b0343b; }

/* ------------------------------------------------------------------ Fußzeile */

.site-foot {
	border-top: 1px solid var(--line);
	padding: 30px 0;
	color: var(--muted); font-size: 13px;
}
.foot-inner {
	max-width: var(--max); margin: 0 auto; padding: 0 var(--pad);
	display: flex; flex-wrap: wrap; gap: 8px 26px; align-items: center;
}
.site-foot a:hover { color: var(--ink); }
.foot-inner .spacer { margin-left: auto; }

@media (prefers-reduced-motion: reduce) {
	html { scroll-behavior: auto; }
	*, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}