/* ============================================================
   Orthogonal Gallery – Style System 2026
   Monochrome · Massive spacing · High typographic contrast
   Orthogonal structure + fluid micro-interactions
   ============================================================ */

:root {
  --bg: #0a0a0a;
  --bg-elevated: #111111;
  --fg: #e8e8e8;
  --fg-muted: #888888;
  --fg-dim: #555555;
  --border: #1e1e1e;
  --border-hover: #333333;
  --accent: #f0f0f0;
  --success: #6a9a6a;
  --error: #c46a6a;
  --font-sans: "Inter", "Helvetica Neue", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", ui-monospace, monospace;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 3rem;
  --space-xl: 5rem;
  --space-2xl: 8rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --radius: 0;
  --header-h: 4.5rem;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.55;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.25s var(--ease);
}

a:hover {
  color: var(--accent);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  padding: 0 var(--space-lg);
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.logo {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.main-nav {
  display: flex;
  gap: var(--space-md);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.main-nav a {
  color: var(--fg-muted);
}

.main-nav a:hover {
  color: var(--fg);
}

.nav-ext {
  opacity: 0.6;
}

/* ---------- Hero ---------- */
.hero {
  min-height: calc(100vh - var(--header-h));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2xl) var(--space-lg);
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.hero-inner {
  max-width: 720px;
}

.hero-label {
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: var(--space-md);
}

.hero-title {
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: var(--space-sm);
}

.hero-artist {
  font-size: 1.1rem;
  color: var(--fg-muted);
  margin-bottom: var(--space-xs);
}

.hero-dates {
  font-size: 0.85rem;
  color: var(--fg-dim);
  letter-spacing: 0.06em;
  margin-bottom: var(--space-md);
}

.hero-note {
  font-size: 0.95rem;
  color: var(--fg-muted);
  max-width: 520px;
  margin: 0 auto var(--space-lg);
  line-height: 1.7;
}

.hero-cta {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.85rem 1.75rem;
  border: 1px solid var(--border-hover);
  color: var(--fg);
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.hero-cta:hover {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
  transform: translateY(-2px);
}

/* ---------- Section headers ---------- */
.section-header {
  padding: var(--space-xl) var(--space-lg) var(--space-md);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-md);
}

.section-title {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fg-dim);
}

/* ---------- Filters ---------- */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.filter-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--fg-muted);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.35rem 0.7rem;
  cursor: pointer;
  transition: all 0.25s var(--ease);
  font-family: inherit;
}

.filter-btn:hover,
.filter-btn.active {
  border-color: var(--fg);
  color: var(--fg);
}

/* ---------- Artwork Grid ---------- */
.artworks {
  padding-bottom: var(--space-2xl);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1px; /* orthogonal lines */
  background: var(--border);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.card {
  background: var(--bg);
  transition: opacity 0.35s var(--ease), transform 0.4s var(--ease-out);
}

.card.is-hidden {
  display: none;
}

.card-link {
  display: block;
  height: 100%;
}

.card-image {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--bg-elevated);
  position: relative;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s var(--ease-out);
}

.card:hover .card-image img {
  transform: scale(1.04);
}

.card-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--fg-dim);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
}

.card-meta {
  padding: var(--space-md);
  border-top: 1px solid var(--border);
}

.card-title {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 0.2rem;
  letter-spacing: -0.01em;
}

.card-artist {
  font-size: 0.85rem;
  color: var(--fg-muted);
}

.card-year {
  font-size: 0.75rem;
  color: var(--fg-dim);
  margin-top: 0.15rem;
}

.empty-state {
  text-align: center;
  padding: var(--space-2xl);
  color: var(--fg-dim);
}

/* ---------- Contact ---------- */
.contact {
  padding: var(--space-2xl) var(--space-lg);
  border-top: 1px solid var(--border);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  max-width: 960px;
  margin: 0 auto;
}

.contact-info {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.8;
}

.contact-info a {
  color: var(--fg);
  border-bottom: 1px solid var(--border);
}

.contact-info a:hover {
  border-color: var(--fg);
}

.btn-whatsapp {
  display: inline-block;
  margin-top: var(--space-md);
  padding: 0.7rem 1.4rem;
  border: 1px solid #25d366;
  color: #25d366;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: background 0.3s var(--ease), color 0.3s var(--ease);
}

.btn-whatsapp:hover {
  background: #25d366;
  color: #0a0a0a;
}

.social-links {
  margin-top: var(--space-md);
  display: flex;
  gap: var(--space-sm);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.contact-form label {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 0.3rem;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.7rem 0.9rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--fg);
  font-family: inherit;
  font-size: 0.95rem;
  margin-bottom: var(--space-sm);
  transition: border-color 0.25s var(--ease);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--fg-muted);
}

.contact-form button {
  background: var(--fg);
  color: var(--bg);
  border: none;
  padding: 0.8rem 1.8rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  transition: opacity 0.25s var(--ease);
}

.contact-form button:hover {
  opacity: 0.85;
}

.form-success {
  color: var(--success);
  margin-bottom: var(--space-sm);
  font-size: 0.9rem;
}

.form-error {
  color: var(--error);
  margin-bottom: var(--space-sm);
  font-size: 0.9rem;
}

/* ---------- Artwork Detail ---------- */
.artwork-detail {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  min-height: calc(100vh - var(--header-h));
  border-bottom: 1px solid var(--border);
}

.artwork-visual {
  background: #050505;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  position: relative;
}

.artwork-figure {
  position: relative;
  max-width: 100%;
  max-height: 85vh;
}

.artwork-img {
  max-height: 85vh;
  width: auto;
  margin: 0 auto;
  cursor: zoom-in;
  transition: opacity 0.3s var(--ease);
}

.zoom-trigger {
  position: absolute;
  bottom: 1rem;
  right: 1rem;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--border-hover);
  background: rgba(10, 10, 10, 0.7);
  color: var(--fg);
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s var(--ease);
}

.artwork-figure:hover .zoom-trigger {
  opacity: 1;
}

.artwork-placeholder {
  color: var(--fg-dim);
  letter-spacing: 0.1em;
  font-size: 0.85rem;
}

.artwork-info {
  padding: var(--space-xl) var(--space-lg);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.aw-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: 0.3rem;
}

.aw-artist {
  font-size: 1.05rem;
  color: var(--fg-muted);
}

.aw-year {
  font-size: 0.85rem;
  color: var(--fg-dim);
  margin-bottom: var(--space-lg);
}

.aw-specs {
  display: grid;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  font-size: 0.9rem;
}

.aw-specs dt {
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 0.15rem;
}

.aw-specs dd {
  color: var(--fg);
}

.aw-description {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.75;
  margin-bottom: var(--space-lg);
  max-width: 36ch;
}

.aw-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: var(--space-lg);
}

.tag {
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.25rem 0.55rem;
  border: 1px solid var(--border);
  color: var(--fg-muted);
}

.aw-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: auto;
}

.btn-back {
  font-size: 0.8rem;
  color: var(--fg-muted);
  letter-spacing: 0.04em;
}

.btn-back:hover {
  color: var(--fg);
}

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.94);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s var(--ease), visibility 0.3s;
}

.lightbox.is-open {
  opacity: 1;
  visibility: visible;
}

.lightbox img {
  max-width: 95vw;
  max-height: 92vh;
  object-fit: contain;
}

.lightbox-close {
  position: absolute;
  top: 1.25rem;
  right: 1.5rem;
  background: none;
  border: none;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  line-height: 1;
  opacity: 0.7;
  transition: opacity 0.2s;
}

.lightbox-close:hover {
  opacity: 1;
}

/* ---------- Footer ---------- */
.site-footer {
  padding: var(--space-lg);
  text-align: center;
  border-top: 1px solid var(--border);
}

.footer-slogan {
  font-size: 0.85rem;
  color: var(--fg-muted);
  margin-bottom: 0.4rem;
  letter-spacing: 0.04em;
}

.footer-copy {
  font-size: 0.7rem;
  color: var(--fg-dim);
  letter-spacing: 0.06em;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .artwork-detail {
    grid-template-columns: 1fr;
  }

  .artwork-info {
    border-left: none;
    border-top: 1px solid var(--border);
  }

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

  .site-header {
    padding: 0 var(--space-md);
  }

  .hero {
    padding: var(--space-xl) var(--space-md);
  }

  .section-header {
    padding-left: var(--space-md);
    padding-right: var(--space-md);
  }

  .contact {
    padding-left: var(--space-md);
    padding-right: var(--space-md);
  }
}

@media (max-width: 600px) {
  .grid {
    grid-template-columns: 1fr;
  }

  .main-nav {
    gap: var(--space-sm);
    font-size: 0.7rem;
  }

  .hero-title {
    font-size: 2rem;
  }
}

/* ---------- Micro-interactions global ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}