/* ==========================================================================
   Digital Art Gallery – Premium Dark Minimalist Stylesheet
   All visible text lives in the HTML/JS (German). This file is presentation only.
   ========================================================================== */

:root {
  --bg: #0a0908;
  --bg-elevated: #12100f;
  --surface: #171412;
  --text-primary: #f3ede4;
  --text-secondary: #c9c0b3;
  --text-muted: #8a8175;
  --border: rgba(255, 255, 255, 0.08);
  --focus: #e8c98a;

  /* Ambient defaults, overridden per artwork/collection via inline style */
  --ambient-primary: #17324D;
  --ambient-secondary: #2E6171;
  --ambient-accent: #C8A45B;

  --radius-s: 6px;
  --radius-m: 14px;
  --radius-l: 24px;
  --shadow-soft: 0 20px 60px rgba(0, 0, 0, 0.45);
  --transition-slow: 900ms cubic-bezier(0.22, 1, 0.36, 1);
  --transition-med: 400ms cubic-bezier(0.22, 1, 0.36, 1);
  --transition-fast: 180ms ease;
  --font-display: "Georgia", "Iowan Old Style", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --max-width: 1400px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--surface);
  color: var(--text-primary);
  padding: 0.75rem 1.25rem;
  z-index: 999;
  border-radius: var(--radius-s);
}
.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

/* Noscript notice */
.noscript-banner {
  background: #2a1616;
  color: #f3ede4;
  padding: 1rem;
  text-align: center;
  font-size: 0.95rem;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 1.5rem;
  background: rgba(10, 9, 8, 0.7);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--border);
}

.brand {
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: 0.02em;
}
.brand span { color: var(--text-muted); font-size: 0.85rem; display: block; font-family: var(--font-body); }

.main-nav { display: flex; gap: 1.25rem; align-items: center; }
.main-nav a {
  font-size: 0.92rem;
  color: var(--text-secondary);
  padding: 0.4rem 0.2rem;
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}
.main-nav a:hover, .main-nav a[aria-current="page"] {
  color: var(--text-primary);
  border-color: var(--ambient-accent, var(--focus));
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: var(--radius-s);
  padding: 0.5rem 0.7rem;
}

@media (max-width: 720px) {
  .main-nav {
    position: fixed;
    inset: 4rem 0 0 0;
    background: rgba(10, 9, 8, 0.97);
    flex-direction: column;
    align-items: flex-start;
    padding: 1.5rem;
    gap: 1rem;
    transform: translateY(-10px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-med), transform var(--transition-med);
  }
  .main-nav.is-open { opacity: 1; transform: translateY(0); pointer-events: auto; }
  .nav-toggle { display: inline-flex; }
}

/* ---------------------------------------------------------------------- */
/* Ambient light system                                                    */
/* ---------------------------------------------------------------------- */

.ambient-layer {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
  transition: opacity var(--transition-slow);
}
.ambient-layer[data-active="false"] { opacity: 0; }

.ambient-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.55;
  will-change: transform;
  transition: background var(--transition-slow);
}
.ambient-blob--a { width: 60vw; height: 60vw; top: -15%; left: -10%; background: var(--ambient-primary); animation: driftA 40s ease-in-out infinite; }
.ambient-blob--b { width: 55vw; height: 55vw; bottom: -20%; right: -10%; background: var(--ambient-secondary); animation: driftB 46s ease-in-out infinite; }
.ambient-blob--c { width: 40vw; height: 40vw; top: 30%; right: 20%; background: var(--ambient-accent); animation: driftC 52s ease-in-out infinite; opacity: 0.35; }

@keyframes driftA { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(4%, 6%) scale(1.08); } }
@keyframes driftB { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(-5%, -4%) scale(1.1); } }
@keyframes driftC { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(-3%, 5%) scale(0.95); } }

@media (prefers-reduced-motion: reduce) {
  .ambient-blob { animation: none !important; }
}

body.ambient-off .ambient-layer { display: none; }

/* ---------------------------------------------------------------------- */
/* Layout helpers                                                          */
/* ---------------------------------------------------------------------- */

.page-wrap {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

.section-heading {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  margin: 3rem 0 1.5rem;
}

/* ---------------------------------------------------------------------- */
/* Hero (index)                                                            */
/* ---------------------------------------------------------------------- */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: 6rem 1.5rem 3rem;
  z-index: 1;
}
.hero-eyebrow { color: var(--text-muted); letter-spacing: 0.12em; text-transform: uppercase; font-size: 0.8rem; margin-bottom: 1rem; }
.hero-title { font-family: var(--font-display); font-size: clamp(2.4rem, 6vw, 4.6rem); line-height: 1.05; max-width: 900px; margin: 0 0 1.2rem; }
.hero-text { font-size: clamp(1rem, 1.4vw, 1.2rem); color: var(--text-secondary); max-width: 620px; margin-bottom: 2.2rem; }
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  font-size: 0.95rem;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.04);
  color: var(--text-primary);
  transition: transform var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
  min-height: 44px;
}
.btn:hover { background: rgba(255,255,255,0.09); transform: translateY(-1px); }
.btn--primary { background: var(--ambient-accent, var(--focus)); color: #12100f; border-color: transparent; font-weight: 600; }
.btn--primary:hover { filter: brightness(1.08); }
.btn--ghost { background: transparent; }
.btn--small { padding: 0.55rem 1.1rem; font-size: 0.85rem; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.hero-feature {
  margin-top: 3.5rem;
  display: grid;
  grid-template-columns: minmax(0,1fr);
  gap: 1rem;
}
.hero-feature-card {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 1.2rem;
  background: rgba(23,20,18,0.6);
  border: 1px solid var(--border);
  border-radius: var(--radius-l);
  padding: 1rem;
  max-width: 560px;
}
.hero-feature-card img { border-radius: var(--radius-m); aspect-ratio: 4/5; object-fit: cover; width: 100%; }
.hero-feature-card h3 { margin: 0 0 0.3rem; font-family: var(--font-display); }
.hero-feature-card p { margin: 0; color: var(--text-secondary); font-size: 0.9rem; }

/* Install button */
.install-banner {
  position: fixed;
  bottom: 1.2rem;
  left: 50%;
  transform: translateX(-50%) translateY(120%);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.7rem 0.6rem 0.7rem 1.2rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  box-shadow: var(--shadow-soft);
  z-index: 60;
  transition: transform var(--transition-med);
}
.install-banner.is-visible { transform: translateX(-50%) translateY(0); }

/* ---------------------------------------------------------------------- */
/* Collections grid                                                        */
/* ---------------------------------------------------------------------- */

.collections-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}
.collection-card {
  position: relative;
  border-radius: var(--radius-l);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-med);
}
.collection-card:hover { transform: translateY(-4px); }
.collection-card__media { aspect-ratio: 4/3; overflow: hidden; }
.collection-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.2s ease; }
.collection-card:hover .collection-card__media img { transform: scale(1.05); }
.collection-card__body { padding: 1.3rem 1.4rem 1.5rem; display: flex; flex-direction: column; gap: 0.6rem; flex: 1; }
.collection-card__title { font-family: var(--font-display); font-size: 1.3rem; margin: 0; }
.collection-card__desc { color: var(--text-secondary); font-size: 0.92rem; margin: 0; flex: 1; }
.collection-card__meta { font-size: 0.8rem; color: var(--text-muted); }

/* ---------------------------------------------------------------------- */
/* Kunstwerk (exhibition) page                                             */
/* ---------------------------------------------------------------------- */

.exhibition {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  z-index: 1;
}

.exhibition-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.5rem;
  flex-wrap: wrap;
}
.exhibition-toolbar__left, .exhibition-toolbar__right {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}
.back-link { color: var(--text-secondary); font-size: 0.9rem; }
.back-link:hover { color: var(--text-primary); }

.artwork-counter {
  font-size: 0.85rem;
  color: var(--text-muted);
  min-width: 3.5rem;
  text-align: center;
}

.icon-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  color: var(--text-primary);
}
.icon-btn:hover { background: rgba(255,255,255,0.1); }
.icon-btn svg { width: 20px; height: 20px; }

.stage {
  position: relative;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 1.5rem 2rem;
  min-height: 55vh;
  touch-action: pan-y;
}

.stage-frame {
  position: relative;
  max-width: min(90vw, 1100px);
  max-height: 72vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.stage-frame img {
  max-width: 100%;
  max-height: 72vh;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-s);
  box-shadow: var(--shadow-soft);
  transition: opacity var(--transition-med), transform var(--transition-med);
  cursor: zoom-in;
}
.stage-frame img.is-zoomed { cursor: zoom-out; }
.stage-frame.is-loading img { opacity: 0; }

.stage-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 5;
}
.stage-nav--prev { left: 0.5rem; }
.stage-nav--next { right: 0.5rem; }

@media (max-width: 720px) {
  .stage-nav { display: none; }
}

.zoom-reset {
  position: absolute;
  bottom: 0.75rem;
  right: 0.75rem;
}

.stage-actions {
  display: flex;
  justify-content: center;
  gap: 0.8rem;
  padding: 0 1.5rem 2rem;
  flex-wrap: wrap;
}

/* Info panel: side panel on desktop, bottom sheet on mobile */
.info-panel {
  position: fixed;
  z-index: 70;
  background: var(--bg-elevated);
  border-left: 1px solid var(--border);
  color: var(--text-primary);
  top: 0;
  right: 0;
  height: 100%;
  width: min(420px, 100vw);
  transform: translateX(100%);
  transition: transform var(--transition-med);
  overflow-y: auto;
  padding: 1.5rem 1.5rem 3rem;
}
.info-panel.is-open { transform: translateX(0); }

@media (max-width: 720px) {
  .info-panel {
    left: 0; right: 0; top: auto; bottom: 0;
    width: 100%;
    height: auto;
    max-height: 85vh;
    border-left: none;
    border-top: 1px solid var(--border);
    border-radius: var(--radius-l) var(--radius-l) 0 0;
    transform: translateY(100%);
  }
  .info-panel.is-open { transform: translateY(0); }
}

.info-panel__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
}
.info-panel__title { font-family: var(--font-display); font-size: 1.5rem; margin: 0; }
.info-panel__meta { color: var(--text-muted); font-size: 0.9rem; margin: 0.3rem 0 0; }
.info-panel__collection { font-size: 0.82rem; color: var(--text-secondary); margin-top: 0.3rem; }
.info-panel__desc { color: var(--text-secondary); margin: 1.2rem 0; font-size: 0.96rem; }

.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 65;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-med);
}
.overlay.is-open { opacity: 1; pointer-events: auto; }

.purchase-block { margin-top: 1.3rem; padding-top: 1.3rem; border-top: 1px solid var(--border); }
.purchase-price { font-size: 1.2rem; font-weight: 600; margin-bottom: 0.8rem; }
.purchase-note { font-size: 0.82rem; color: var(--text-muted); margin-top: 0.5rem; }
.external-indicator { font-size: 0.8rem; opacity: 0.8; margin-left: 0.3rem; }
.inquiry-block { margin-top: 1rem; }
.btn--block { width: 100%; justify-content: center; }

/* Audio controls */
.audio-controls {
  margin-top: 1.6rem;
  padding-top: 1.3rem;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}
.audio-controls__row { display: flex; align-items: center; gap: 0.7rem; }
.audio-controls__row input[type="range"] { flex: 1; }
.audio-hint { font-size: 0.8rem; color: var(--text-muted); }

/* ---------------------------------------------------------------------- */
/* Über die Künstlerin                                                     */
/* ---------------------------------------------------------------------- */

.artist-layout {
  display: grid;
  grid-template-columns: minmax(220px, 320px) 1fr;
  gap: 2.5rem;
  align-items: start;
  margin-top: 3rem;
}
@media (max-width: 780px) {
  .artist-layout { grid-template-columns: 1fr; }
}
.artist-portrait { border-radius: var(--radius-l); overflow: hidden; border: 1px solid var(--border); }
.artist-bio p { color: var(--text-secondary); font-size: 1.02rem; margin-bottom: 1rem; }
.social-links { display: flex; gap: 1rem; margin-top: 1.5rem; }

/* ---------------------------------------------------------------------- */
/* Kontakt                                                                  */
/* ---------------------------------------------------------------------- */

.contact-card {
  margin-top: 2.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-l);
  padding: 2rem;
  max-width: 640px;
}
.contact-card p { color: var(--text-secondary); }
.contact-form { display: flex; flex-direction: column; gap: 1rem; margin-top: 1.5rem; }
.contact-form label { font-size: 0.85rem; color: var(--text-muted); }
.contact-form input, .contact-form textarea {
  width: 100%;
  padding: 0.7rem 0.9rem;
  border-radius: var(--radius-s);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text-primary);
  font-family: inherit;
}

/* ---------------------------------------------------------------------- */
/* Legal pages                                                              */
/* ---------------------------------------------------------------------- */

.legal-content h2 { font-family: var(--font-display); margin-top: 2rem; }
.legal-content p, .legal-content li { color: var(--text-secondary); }
.placeholder-notice {
  background: rgba(200,164,91,0.12);
  border: 1px solid rgba(200,164,91,0.3);
  border-radius: var(--radius-m);
  padding: 1rem 1.3rem;
  margin-bottom: 2rem;
  font-size: 0.92rem;
}

/* Footer */
.site-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border);
  padding: 2.5rem 1.5rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
}
.site-footer a { color: var(--text-secondary); }
.site-footer a:hover { color: var(--text-primary); }
.footer-links { display: flex; gap: 1.2rem; flex-wrap: wrap; }

/* Settings row (ambient/audio toggles reused across pages) */
.settings-row {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  align-items: center;
}

/* Fallback / empty states */
.empty-state {
  text-align: center;
  padding: 4rem 1rem;
  color: var(--text-muted);
}

/* Loading skeleton pulse (respect reduced motion) */
.skeleton {
  background: linear-gradient(90deg, rgba(255,255,255,0.04), rgba(255,255,255,0.08), rgba(255,255,255,0.04));
  background-size: 200% 100%;
  animation: skeletonPulse 1.6s ease-in-out infinite;
  border-radius: var(--radius-m);
}
@media (prefers-reduced-motion: reduce) { .skeleton { animation: none; } }
@keyframes skeletonPulse { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* Fullscreen mode tweaks */
:fullscreen .stage-frame img,
:-webkit-full-screen .stage-frame img { max-height: 96vh; }