/* ============================================================
   FRANK HOCHSCHORNER — Fotografie
   ============================================================
   Typographie: Helvetica Neue / Helvetica / Arial (system)
   Palette: #0a0a0a / #f0f0f0 — kein Grau, keine Farbe
   Grid: 8px-Basis-Spacing
   ============================================================ */


/* ── Custom Properties ──────────────────────────────────────── */

:root {
  --ink:          #0a0a0a;
  --paper:        #f0f0f0;
  --white:        #ffffff;
  --black:        #000000;

  --rule-dark:    rgba(255, 255, 255, 0.10);
  --rule-light:   rgba(0,   0,   0,   0.12);

  --font:         'Helvetica Neue', Helvetica, Arial, sans-serif;

  --nav-h:        60px;

  /* Spacing-Skala (Vielfache von 8px) */
  --sp-1:  8px;
  --sp-2:  16px;
  --sp-3:  24px;
  --sp-4:  32px;
  --sp-5:  48px;
  --sp-6:  64px;
  --sp-7:  96px;
  --sp-8:  128px;

  /* Horizontaler Seitenabstand, skaliert mit Viewport */
  --px: clamp(24px, 4vw, 72px);

  /* Border-Farbe, wird per Sektion überschrieben */
  --border-c: var(--rule-dark);
}

/* Helle Sektionen überschreiben die Border-Farbe */
#arbeiten,
#kontakt {
  --border-c: var(--rule-light);
}


/* ── Reset ──────────────────────────────────────────────────── */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--ink);
  color: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

::selection {
  background: var(--paper);
  color: var(--ink);
}


/* ── Navigation ─────────────────────────────────────────────── */

#nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  z-index: 200;
  background: var(--ink);
  border-bottom: 1px solid var(--rule-dark);
  transition: border-color 0.4s ease;
}

#nav.scrolled {
  border-color: rgba(255, 255, 255, 0.18);
}

.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
  padding: 0 var(--px);
}

.nav-brand {
  font-size: 0.8125rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: lowercase;
  opacity: 0.85;
  transition: opacity 0.2s;
}

.nav-brand:hover {
  opacity: 1;
}

.nav-links {
  display: flex;
  gap: var(--sp-4);
}

.nav-links a {
  font-size: 0.8125rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: lowercase;
  opacity: 0.5;
  transition: opacity 0.2s;
}

.nav-links a:hover {
  opacity: 1;
}


/* ── Section gemeinsame Stile ───────────────────────────────── */

.section-wrap {
  padding: var(--sp-7) var(--px);
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: var(--sp-3);
  padding-bottom: var(--sp-4);
  border-bottom: 1px solid var(--border-c);
  margin-bottom: var(--sp-6);
}

.section-num {
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  opacity: 0.35;
}

.section-head h2 {
  font-size: 0.8125rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: lowercase;
}

.gallery-filter {
  margin-left: auto;
  display: flex;
  gap: var(--sp-3);
  align-items: center;
}

.gallery-filter-btn {
  background: none;
  border: none;
  border-bottom: 1px solid transparent;
  font-family: var(--font);
  font-size: 0.8125rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: lowercase;
  color: var(--ink);
  cursor: pointer;
  padding: 0 0 2px;
  opacity: 0.35;
  transition: opacity 0.2s, border-color 0.2s;
  line-height: 1;
}

.gallery-filter-btn:hover {
  opacity: 0.7;
}

.gallery-filter-btn.active {
  opacity: 1;
  border-bottom-color: var(--ink);
}


/* ── Hero ───────────────────────────────────────────────────── */

#hero {
  display: grid;
  grid-template-columns: 55% 45%;
  min-height: 100vh;
  background: var(--ink);
}

.hero-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--sp-8) var(--px);
  padding-top: calc(var(--nav-h) + var(--sp-7));
  position: relative;
}

.hero-index {
  position: absolute;
  top: calc(var(--nav-h) + var(--sp-4));
  left: var(--px);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  opacity: 0.3;
}

h1 {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.hero-first {
  font-size: clamp(1.75rem, 3.5vw, 3.5rem);
  font-weight: 300;
  letter-spacing: 0.02em;
  text-transform: lowercase;
  opacity: 0.45;
  animation: fadeUp 1s ease 0.3s both;
}

.hero-last {
  font-size: clamp(2rem, 5vw, 5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  text-transform: lowercase;
  animation: fadeUp 1s ease 0.5s both;
}

.hero-rule {
  width: 48px;
  height: 1px;
  background: var(--paper);
  opacity: 0.3;
  margin: var(--sp-4) 0;
  animation: fadeUp 0.8s ease 0.7s both;
}

.hero-sub {
  font-size: 0.8125rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: lowercase;
  opacity: 0.4;
  animation: fadeUp 0.8s ease 0.9s both;
}

.hero-scroll {
  position: absolute;
  bottom: var(--sp-5);
  left: var(--px);
  font-size: 0.875rem;
  opacity: 0.3;
  animation: bounce 2.5s ease 2s infinite;
}

.hero-visual {
  position: relative;
  overflow: hidden;
  background: #111;
  animation: fadeIn 1.8s ease 0.4s both;
}

#hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.85;
}


/* ── Galerie ─────────────────────────────────────────────────── */

#arbeiten {
  background: var(--paper);
  color: var(--ink);
}

#arbeiten .section-wrap {
  padding-bottom: var(--sp-5);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background: var(--ink);
}

.gallery-item {
  aspect-ratio: 1 / 1;
  overflow: hidden;
  cursor: pointer;
  background: #d8d8d8;
  position: relative;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%);
  transition: transform 0.6s ease, filter 0.5s ease;
  display: block;
}

.gallery-item:hover img {
  transform: scale(1.04);
  filter: grayscale(0%);
}

.gallery-empty {
  background: var(--paper);
  color: var(--ink);
  padding: var(--sp-6) var(--px);
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  opacity: 0.5;
}

.gallery-empty code {
  font-family: 'Courier New', Courier, monospace;
  background: rgba(0,0,0,0.08);
  padding: 2px 6px;
}


/* ── Über ───────────────────────────────────────────────────── */

#ueber {
  background: var(--ink);
  color: var(--paper);
}

.ueber-layout {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--sp-6);
  align-items: start;
}

.ueber-statement p {
  font-size: clamp(1.75rem, 3vw, 2.75rem);
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.ueber-body {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  padding-top: 4px;
}

.ueber-body p {
  font-size: 1rem;
  font-weight: 300;
  line-height: 1.7;
  opacity: 0.7;
  letter-spacing: 0.01em;
}

.ueber-portrait {
  background: #141414;
}

.ueber-portrait img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  display: block;
}


/* ── Kontakt ─────────────────────────────────────────────────── */

#kontakt {
  background: var(--paper);
  color: var(--ink);
}

.kontakt-layout {
  border-top: 0;
}

.kontakt-logo-row {
  /* Überspannt beide Spalten des Grid */
  grid-template-columns: 1fr;
  padding-top: var(--sp-5);
  padding-bottom: var(--sp-5);
}

.kontakt-logo {
  width: 100%;
  height: auto;
  display: block;
  /* Weißes Logo auf hellem Hintergrund invertieren → schwarz */
  filter: invert(1);
  opacity: 0.82;
}

.kontakt-row {
  display: grid;
  grid-template-columns: 180px 1fr;
  padding: var(--sp-3) 0;
  border-bottom: 1px solid var(--rule-light);
  align-items: start;
  gap: var(--sp-4);
}

.kontakt-layout > .kontakt-row:first-child {
  border-top: 1px solid var(--rule-light);
}

.kontakt-label {
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: lowercase;
  opacity: 0.45;
  padding-top: 2px;
}

.kontakt-value {
  font-size: 1rem;
  font-weight: 300;
  line-height: 1.5;
  letter-spacing: 0.01em;
}

a.kontakt-value,
.kontakt-value a {
  transition: opacity 0.2s;
}

a.kontakt-value:hover,
.kontakt-value a:hover {
  opacity: 0.55;
}


/* ── Footer ─────────────────────────────────────────────────── */

#footer {
  background: var(--black);
  color: rgba(255, 255, 255, 0.4);
  padding: var(--sp-3) var(--px);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}


.footer-copy,
.footer-nav a {
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: lowercase;
}

.footer-nav {
  display: flex;
  gap: var(--sp-4);
}

.footer-nav a {
  transition: color 0.2s;
}

.footer-nav a:hover {
  color: rgba(255, 255, 255, 0.8);
}


/* ── Lightbox ───────────────────────────────────────────────── */

#lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.96);
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

#lightbox.open {
  opacity: 1;
  pointer-events: all;
}

#lb-figure {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-2);
}

#lb-img {
  max-width: 88vw;
  max-height: 85vh;
  object-fit: contain;
  transition: opacity 0.25s ease;
}

#lb-caption {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  opacity: 0.4;
}

#lb-close,
#lb-prev,
#lb-next {
  position: fixed;
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  font-family: var(--font);
  padding: var(--sp-3);
  transition: color 0.2s;
  line-height: 1;
}

#lb-close:hover,
#lb-prev:hover,
#lb-next:hover {
  color: var(--white);
}

#lb-close {
  top: var(--sp-3);
  right: var(--sp-3);
  font-size: 1rem;
}

#lb-prev {
  left: var(--sp-3);
  top: 50%;
  transform: translateY(-50%);
  font-size: 2.5rem;
  font-weight: 300;
}

#lb-next {
  right: var(--sp-3);
  top: 50%;
  transform: translateY(-50%);
  font-size: 2.5rem;
  font-weight: 300;
}


/* ── Scroll Reveal ──────────────────────────────────────────── */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.75s ease, transform 0.75s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-d1 { transition-delay: 0.10s; }
.reveal-d2 { transition-delay: 0.20s; }
.reveal-d3 { transition-delay: 0.30s; }


/* ── Keyframes ──────────────────────────────────────────────── */

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(7px); }
}


/* ── Legale Seiten (Impressum, Datenschutz) ─────────────────── */

.legal-page {
  padding-top: var(--nav-h);
  min-height: 100vh;
  background: var(--ink);
  color: var(--paper);
}

.legal-header {
  display: flex;
  align-items: baseline;
  gap: var(--sp-3);
  padding: var(--sp-7) var(--px) var(--sp-4);
  border-bottom: 1px solid var(--rule-dark);
}

.legal-header h1 {
  font-size: 0.8125rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: lowercase;
}

.legal-content {
  padding: var(--sp-6) var(--px) var(--sp-8);
  max-width: 720px;
}

.legal-section {
  margin-bottom: var(--sp-6);
  padding-bottom: var(--sp-6);
  border-bottom: 1px solid var(--rule-dark);
}

.legal-section:last-child {
  border-bottom: none;
}

.legal-section h2 {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: lowercase;
  margin-bottom: var(--sp-3);
}

.legal-section h3 {
  font-size: 0.8125rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  text-transform: lowercase;
  opacity: 0.6;
  margin-top: var(--sp-4);
  margin-bottom: var(--sp-2);
}

.legal-section p,
.legal-section address {
  font-size: 1rem;
  font-weight: 300;
  line-height: 1.75;
  opacity: 0.75;
  font-style: normal;
}

.legal-section p + p {
  margin-top: var(--sp-2);
}

.legal-section a {
  border-bottom: 1px solid rgba(255,255,255,0.25);
  transition: border-color 0.2s;
}

.legal-section a:hover {
  border-color: rgba(255,255,255,0.7);
}

.legal-back {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: 0.8125rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: lowercase;
  opacity: 0.5;
  padding: var(--sp-5) var(--px) 0;
  transition: opacity 0.2s;
}

.legal-back:hover {
  opacity: 1;
}


/* ── Responsive ─────────────────────────────────────────────── */

/* Tablet */
@media (max-width: 900px) {
  #hero {
    grid-template-columns: 1fr;
    grid-template-rows: auto 55vw;
  }

  .hero-text {
    padding: var(--sp-6) var(--px);
    padding-top: calc(var(--nav-h) + var(--sp-5));
    padding-bottom: var(--sp-4);
  }

  .hero-scroll {
    display: none;
  }

  .ueber-layout {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
  }

  .ueber-statement {
    grid-column: 1 / -1;
  }

  .ueber-portrait {
    grid-row: 2;
    grid-column: 2;
  }

  .ueber-body {
    grid-row: 2;
    grid-column: 1;
  }

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Mobile */
@media (max-width: 600px) {
  .nav-links {
    gap: var(--sp-3);
  }

  .nav-links a {
    font-size: 0.75rem;
  }

  #hero {
    grid-template-rows: auto 70vw;
  }

  .ueber-layout {
    grid-template-columns: 1fr;
  }

  .ueber-statement,
  .ueber-body,
  .ueber-portrait {
    grid-column: 1;
    grid-row: auto;
  }

  .ueber-portrait {
    order: -1;
  }

  .gallery-grid {
    grid-template-columns: 1fr 1fr;
  }

  .kontakt-row {
    grid-template-columns: 1fr;
    gap: var(--sp-1);
  }

  .legal-content {
    padding-left: var(--px);
    padding-right: var(--px);
  }
}

/* Sehr breite Screens */
@media (min-width: 1600px) {
  .gallery-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}