/* ==========================================================================
   parallax.photo — Dean Cully Aerial Landscape Photography
   Shared stylesheet — all pages
   ========================================================================== */

/* --------------------------------------------------------------------------
   Custom properties
   -------------------------------------------------------------------------- */
:root {
  --bg:           #0d0d0d;
  --bg-raised:    #151515;
  --bg-card:      #1a1a1a;
  --border:       #2a2a2a;
  --border-light: #333333;
  --text:         #d8d8d8;
  --text-muted:   #888888;
  --text-dim:     #555555;
  --accent:       #c8b99a;   /* warm off-white — print/buy elements only */
  --accent-dim:   #8a7d6a;
  --white:        #f0f0f0;
  --nav-height:   60px;
  --font-body:    'Georgia', 'Times New Roman', serif;
  --font-ui:      -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  --max-width:    1200px;
  --gallery-gap:  3px;
}

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

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

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

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

ul, ol {
  list-style: none;
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4 {
  font-family: var(--font-ui);
  font-weight: 300;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--white);
  line-height: 1.2;
}

h1 { font-size: 1.5rem; }
h2 { font-size: 1.1rem; }
h3 { font-size: 0.85rem; }

p {
  margin-bottom: 1.2em;
}

p:last-child {
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   Primary navigation
   -------------------------------------------------------------------------- */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background-color: rgba(13, 13, 13, 0.95);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.site-nav__identity {
  font-family: var(--font-ui);
  font-weight: 300;
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--white);
  flex-shrink: 0;
}

.site-nav__identity a {
  color: var(--white);
}

.site-nav__links {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}

.site-nav__links a {
  font-family: var(--font-ui);
  font-weight: 400;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.site-nav__links a:hover,
.site-nav__links a.active {
  color: var(--white);
}

/* Hamburger (mobile) */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 1px;
  background-color: var(--text);
  transition: all 0.25s ease;
}

/* --------------------------------------------------------------------------
   Portfolio sub-navigation
   -------------------------------------------------------------------------- */
.portfolio-nav {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  z-index: 99;
  height: 44px;
  background-color: var(--bg-raised);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
  padding: 0 2rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.portfolio-nav a {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
  white-space: nowrap;
  transition: color 0.2s ease;
}

.portfolio-nav a:hover,
.portfolio-nav a.active {
  color: var(--text);
}

/* Body offset when sub-nav present */
body.has-portfolio-nav {
  --nav-total: calc(var(--nav-height) + 44px);
}

/* --------------------------------------------------------------------------
   Main content wrapper
   -------------------------------------------------------------------------- */
main {
  flex: 1;
  padding-top: var(--nav-height);
}

body.has-portfolio-nav main {
  padding-top: calc(var(--nav-height) + 44px);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-footer__copy {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--text-dim);
}

.site-footer__links {
  display: flex;
  gap: 1.5rem;
}

.site-footer__links a {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  transition: color 0.2s ease;
}

.site-footer__links a:hover {
  color: var(--text);
}

/* --------------------------------------------------------------------------
   HOME — hero
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  width: 100%;
  height: calc(100vh - var(--nav-height));
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

.hero__image-container {
  position: absolute;
  inset: 0;
  background-color: #1c1c1c;
  /* Hero image placed here via inline style or img tag */
}

.hero__image-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0.85;
}

/* Empty hero placeholder (no image yet) */
.hero__placeholder {
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, #1a1a1a 0%, #0d0d0d 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero__placeholder-label {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13,13,13,0.7) 0%, transparent 50%);
}

.hero__content {
  position: relative;
  z-index: 2;
  padding: 3rem 2.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
}

.hero__tagline {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   PAGE HEADER (interior pages)
   -------------------------------------------------------------------------- */
.page-header {
  padding: 3.5rem 2rem 2rem;
  border-bottom: 1px solid var(--border);
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
}

.page-header h1 {
  font-size: 0.9rem;
  letter-spacing: 0.22em;
}

.page-header p {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  max-width: 55ch;
  font-family: var(--font-ui);
  font-weight: 300;
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   PORTFOLIO INDEX — category grid
   -------------------------------------------------------------------------- */
.portfolio-index {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 2rem 4rem;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  margin-top: 2.5rem;
}

.category-card {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  display: block;
  background-color: var(--bg-card);
}

.category-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease, opacity 0.3s ease;
  opacity: 0.75;
}

.category-card:hover .category-card__image {
  transform: scale(1.03);
  opacity: 0.9;
}

/* Empty image placeholder */
.category-card__placeholder {
  width: 100%;
  height: 100%;
  background-color: var(--bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
}

.category-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13,13,13,0.65) 0%, transparent 55%);
  pointer-events: none;
}

.category-card__label {
  position: absolute;
  bottom: 1.5rem;
  left: 1.5rem;
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--white);
}

/* --------------------------------------------------------------------------
   GALLERY PAGES — image grid
   -------------------------------------------------------------------------- */
.gallery-section {
  padding: 2.5rem 0 4rem;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gallery-gap);
  padding: 0 var(--gallery-gap);
}

.gallery-item {
  position: relative;
  cursor: pointer;
  overflow: hidden;
  background-color: var(--bg-card);
  aspect-ratio: 3 / 2;
}

.gallery-item__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease, opacity 0.3s ease;
  opacity: 0.8;
}

.gallery-item:hover .gallery-item__img {
  transform: scale(1.04);
  opacity: 1;
}

/* Empty image placeholder in gallery */
.gallery-item__placeholder {
  width: 100%;
  height: 100%;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  color: var(--text-dim);
  font-family: var(--font-ui);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.gallery-item__caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 2rem 0.75rem 0.6rem;
  background: linear-gradient(to top, rgba(13,13,13,0.85) 0%, transparent 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.gallery-item:hover .gallery-item__caption {
  opacity: 1;
}

.gallery-item__caption-title {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--white);
  display: block;
}

.gallery-item__caption-loc {
  font-family: var(--font-ui);
  font-size: 0.6rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  display: block;
  margin-top: 1px;
}

/* --------------------------------------------------------------------------
   LIGHTBOX
   -------------------------------------------------------------------------- */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background-color: rgba(5, 5, 5, 0.96);
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.lightbox.is-open {
  display: flex;
}

.lightbox__close {
  position: absolute;
  top: 1.25rem;
  right: 1.5rem;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-family: var(--font-ui);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.5rem;
  transition: color 0.2s ease;
  z-index: 10;
}

.lightbox__close:hover {
  color: var(--white);
}

.lightbox__prev,
.lightbox__next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-dim);
  font-size: 1.5rem;
  padding: 1rem;
  transition: color 0.2s ease;
  line-height: 1;
  z-index: 10;
  font-family: var(--font-ui);
  font-weight: 200;
}

.lightbox__prev { left: 1rem; }
.lightbox__next { right: 1rem; }

.lightbox__prev:hover,
.lightbox__next:hover {
  color: var(--white);
}

.lightbox__image-wrap {
  max-width: 90vw;
  max-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox__img {
  max-width: 90vw;
  max-height: 78vh;
  object-fit: contain;
}

/* Lightbox placeholder when no image */
.lightbox__img-placeholder {
  width: min(80vw, 900px);
  height: min(60vh, 600px);
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  font-family: var(--font-ui);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.lightbox__caption {
  margin-top: 1.25rem;
  text-align: center;
  padding: 0 2rem;
}

.lightbox__caption-title {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--white);
}

.lightbox__caption-meta {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  margin-top: 0.3rem;
}

.lightbox__caption-print {
  margin-top: 0.75rem;
  font-family: var(--font-ui);
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.lightbox__caption-print a {
  color: var(--accent-dim);
  border-bottom: 1px solid var(--accent-dim);
  padding-bottom: 1px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.lightbox__caption-print a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* --------------------------------------------------------------------------
   PRINTS PAGE
   -------------------------------------------------------------------------- */
.prints-section {
  max-width: 960px;
  margin: 0 auto;
  padding: 2.5rem 2rem 5rem;
}

.prints-intro {
  font-size: 0.9rem;
  color: var(--text-muted);
  max-width: 60ch;
  font-family: var(--font-ui);
  font-weight: 300;
  line-height: 1.7;
  margin-bottom: 3rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 2rem;
}

.prints-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 3rem 2.5rem;
}

.print-card {
  display: flex;
  flex-direction: column;
}

.print-card__image-wrap {
  aspect-ratio: 4 / 3;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.print-card__placeholder-label {
  font-family: var(--font-ui);
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
  text-align: center;
  padding: 1rem;
}

.print-card__info {
  padding: 1rem 0 0;
}

.print-card__title {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--white);
}

.print-card__location {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  margin-top: 0.2rem;
}

.print-card__medium {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  color: var(--text-dim);
  letter-spacing: 0.08em;
  margin-top: 0.2rem;
}

.print-card__sizes {
  margin-top: 1rem;
  border-top: 1px solid var(--border);
  padding-top: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.print-size-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.print-size-row__label {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}

.print-size-row__right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.print-size-row__price {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  color: var(--text);
  letter-spacing: 0.06em;
}

.btn-order {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bg);
  background-color: var(--accent);
  padding: 0.35rem 0.75rem;
  border: none;
  cursor: pointer;
  transition: background-color 0.2s ease;
  text-decoration: none;
}

.btn-order:hover {
  background-color: var(--white);
  color: var(--bg);
}

/* Placeholder badge */
.placeholder-badge {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: 0.55rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 0.15rem 0.4rem;
  margin-left: 0.5rem;
  vertical-align: middle;
}

.prints-notes {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 300;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 60ch;
}

.prints-notes a {
  color: var(--accent-dim);
  border-bottom: 1px solid var(--accent-dim);
}

.prints-notes a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* --------------------------------------------------------------------------
   LICENSING PAGE
   -------------------------------------------------------------------------- */
.licensing-section {
  max-width: 900px;
  margin: 0 auto;
  padding: 2.5rem 2rem 5rem;
}

.licensing-intro {
  font-size: 0.9rem;
  color: var(--text-muted);
  max-width: 62ch;
  font-family: var(--font-ui);
  font-weight: 300;
  line-height: 1.7;
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.licensing-intro p {
  margin-bottom: 0.8em;
}

.rate-table-wrap {
  overflow-x: auto;
  margin-bottom: 2.5rem;
}

.rate-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-ui);
  font-size: 0.72rem;
}

.rate-table th {
  text-align: left;
  padding: 0.6rem 1rem;
  background-color: var(--bg-raised);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: 0.6rem;
  white-space: nowrap;
}

.rate-table td {
  padding: 0.7rem 1rem;
  border: 1px solid var(--border);
  color: var(--text);
  vertical-align: top;
  line-height: 1.5;
}

.rate-table td.rate-cat {
  color: var(--white);
  font-weight: 500;
  white-space: nowrap;
}

.rate-table tr:nth-child(even) td {
  background-color: rgba(255,255,255,0.015);
}

.licensing-notes {
  font-family: var(--font-ui);
  font-size: 0.82rem;
  font-weight: 300;
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 62ch;
}

.licensing-notes p {
  margin-bottom: 1em;
}

.licensing-notes a {
  color: var(--accent-dim);
  border-bottom: 1px solid var(--accent-dim);
}

.licensing-notes a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* --------------------------------------------------------------------------
   ABOUT PAGE
   -------------------------------------------------------------------------- */
.about-section {
  max-width: 720px;
  margin: 0 auto;
  padding: 2.5rem 2rem 5rem;
}

.about-section h2 {
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--text-dim);
}

.about-section p {
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--text);
  margin-bottom: 1.2em;
}

.about-section dl {
  margin: 0;
}

.about-section dt {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-top: 1.2rem;
  margin-bottom: 0.3rem;
}

.about-section dd {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--text);
  margin: 0;
  padding: 0;
}

.about-prints-link {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-ui);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.about-prints-link a {
  color: var(--accent-dim);
  border-bottom: 1px solid var(--accent-dim);
  padding-bottom: 1px;
  transition: color 0.2s ease;
}

.about-prints-link a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* --------------------------------------------------------------------------
   CONTACT PAGE
   -------------------------------------------------------------------------- */
.contact-section {
  max-width: 600px;
  margin: 0 auto;
  padding: 2.5rem 2rem 5rem;
}

.contact-intro {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 300;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 2.5rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.contact-intro p {
  margin-bottom: 0;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-field label {
  font-family: var(--font-ui);
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.form-field input,
.form-field select,
.form-field textarea {
  background-color: var(--bg-raised);
  border: 1px solid var(--border-light);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 300;
  padding: 0.65rem 0.75rem;
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
  border-radius: 0;
  transition: border-color 0.2s ease;
  outline: none;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  border-color: var(--text-dim);
}

.form-field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23555'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2rem;
  cursor: pointer;
}

.form-field textarea {
  resize: vertical;
  min-height: 140px;
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: var(--text-dim);
}

.btn-submit {
  align-self: flex-start;
  font-family: var(--font-ui);
  font-size: 0.65rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--bg);
  background-color: var(--text-muted);
  padding: 0.7rem 1.5rem;
  border: none;
  cursor: pointer;
  transition: background-color 0.2s ease;
  border-radius: 0;
}

.btn-submit:hover {
  background-color: var(--white);
}

.form-response-note {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  color: var(--text-dim);
  letter-spacing: 0.06em;
  margin-top: 0.5rem;
}

/* --------------------------------------------------------------------------
   Utility
   -------------------------------------------------------------------------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}

.text-center { text-align: center; }
.mt-sm { margin-top: 1rem; }
.mt-md { margin-top: 2rem; }

/* --------------------------------------------------------------------------
   MOBILE — responsive
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  .site-nav {
    padding: 0 1.25rem;
  }

  .site-nav__links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background-color: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    gap: 0;
    padding: 0.5rem 0;
  }

  .site-nav__links.is-open {
    display: flex;
  }

  .site-nav__links a {
    padding: 0.75rem 1.5rem;
    font-size: 0.7rem;
  }

  .nav-toggle {
    display: flex;
  }

  .portfolio-nav {
    justify-content: flex-start;
    gap: 1.5rem;
    padding: 0 1.25rem;
  }

  .hero__content {
    padding: 2rem 1.25rem;
  }

  .page-header {
    padding: 2rem 1.25rem 1.5rem;
  }

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

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

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

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1.25rem 1.25rem;
  }

  .lightbox__prev { left: 0.25rem; }
  .lightbox__next { right: 0.25rem; }
}

@media (max-width: 480px) {
  .gallery-grid {
    grid-template-columns: 1fr;
    gap: 1px;
  }

  .portfolio-index {
    padding: 1.5rem 1.25rem 3rem;
  }

  .prints-section,
  .licensing-section,
  .about-section,
  .contact-section {
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }
}