/* ============================================================
   ArtDemo — Global Styles & Design System
   artdemo.jabana.tech
   ============================================================ */

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500&family=Inter:wght@300;400;500;600&display=swap');

/* ── Design Tokens ── */
:root {
  --color-bg: #fafaf8;
  --color-surface: #ffffff;
  --color-border: #e8e4df;
  --color-border-light: #f0ede9;
  --color-text: #1a1a18;
  --color-text-muted: #6b6864;
  --color-text-light: #9e9b98;
  --color-accent: #2c2c2a;
  --color-accent-hover: #444440;
  --color-accent-light: #f4f3f1;
  --color-success: #2d6a4f;
  --color-success-bg: #d8f3dc;
  --color-error: #9b2226;
  --color-error-bg: #fbe9e7;
  --color-warning: #7d5a00;
  --color-warning-bg: #fff3cd;

  --font-heading: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --radius-sm: 2px;
  --radius: 4px;
  --radius-lg: 8px;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.08), 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12), 0 8px 24px rgba(0, 0, 0, 0.06);
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-card-hover: 0 8px 32px rgba(0, 0, 0, 0.12);

  --nav-height: 72px;
  --container-max: 1280px;
  --container-pad: clamp(1rem, 4vw, 2.5rem);

  --transition-fast: 150ms ease;
  --transition: 250ms ease;
  --transition-slow: 400ms ease;
}

/* ── Reset ── */
*,
*::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-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul,
ol {
  list-style: none;
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 500;
  line-height: 1.2;
  color: var(--color-text);
}

/* ── Layout Utilities ── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.container--narrow {
  max-width: 760px;
}

.container--wide {
  max-width: 1440px;
}

/* ── Navigation ── */
.main-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(250, 250, 248, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  padding-inline: var(--container-pad);
  gap: 2rem;
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.375rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text);
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-logo:hover {
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-left: auto;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
  padding: 0.5rem 0.875rem;
  transition: color var(--transition-fast);
  position: relative;
}

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

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0.875rem;
  right: 0.875rem;
  height: 1px;
  background: var(--color-text);
}

.nav-links .nav-admin-link {
  margin-left: 0.75rem;
  padding: 0.4rem 1rem;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.nav-links .nav-admin-link:hover {
  color: var(--color-text);
  border-color: var(--color-text);
  background: transparent;
}

.nav-links .nav-admin-link::after {
  display: none;
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  margin-left: auto;
  flex-shrink: 0;
  padding: 6px;
}

.nav-hamburger span {
  display: block;
  height: 1.5px;
  background: var(--color-text);
  transition: transform var(--transition), opacity var(--transition);
  transform-origin: center;
}

.nav-hamburger.open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.nav-hamburger.open span:nth-child(2) {
  opacity: 0;
}

.nav-hamburger.open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* ── Footer ── */
.main-footer {
  background: var(--color-text);
  color: rgba(255, 255, 255, 0.7);
  padding: 3rem var(--container-pad) 2.5rem;
  margin-top: 6rem;
}

.footer-inner {
  max-width: var(--container-max);
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: start;
}

.footer-brand {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 0.5rem;
}

.footer-copy {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.45);
  margin-top: 1.5rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: flex-end;
}

.footer-links a {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.55);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: rgba(255, 255, 255, 0.9);
}

.footer-social {
  display: flex;
  gap: 1rem;
  margin-top: 0.5rem;
}

.footer-social a {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.5);
  transition: color var(--transition-fast);
}

.footer-social a:hover {
  color: rgba(255, 255, 255, 0.9);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: var(--color-accent);
  color: #ffffff;
  border: 1px solid var(--color-accent);
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
  -webkit-appearance: none;
}

.btn:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-outline {
  background: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
}

.btn-outline:hover {
  background: var(--color-accent);
  color: #ffffff;
}

.btn-sm {
  padding: 0.5rem 1.125rem;
  font-size: 0.8125rem;
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 0.9375rem;
}

/* ── Form Elements ── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-label {
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.9375rem;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  -webkit-appearance: none;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--color-text);
  box-shadow: 0 0 0 3px rgba(44, 44, 42, 0.08);
}

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

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

.form-feedback {
  font-size: 0.875rem;
  padding: 0.875rem 1rem;
  border-left: 3px solid transparent;
}

.form-feedback.success {
  background: var(--color-success-bg);
  color: var(--color-success);
  border-color: var(--color-success);
}

.form-feedback.error {
  background: var(--color-error-bg);
  color: var(--color-error);
  border-color: var(--color-error);
}

/* ── Painting Cards ── */
.paintings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2px;
}

.painting-card {
  position: relative;
  overflow: hidden;
  background: var(--color-border-light);
  cursor: pointer;
}

.painting-card a {
  display: block;
  text-decoration: none;
  color: inherit;
}

.painting-card__image-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 3 / 4;
  background: var(--color-border-light);
}

.painting-card__image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.painting-card:hover .painting-card__image-wrap img {
  transform: scale(1.04);
}

.painting-card__overlay {
  position: absolute;
  inset: 0;
  background: rgba(26, 26, 24, 0);
  transition: background var(--transition);
}

.painting-card:hover .painting-card__overlay {
  background: rgba(26, 26, 24, 0.18);
}

.painting-card__info {
  padding: 1rem;
  background: var(--color-surface);
}

.painting-card__title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 0.25rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.painting-card__meta {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.painting-card__badge {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.25rem 0.625rem;
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

/* ── Collection Cards ── */
.collections-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.collection-card {
  position: relative;
  overflow: hidden;
  background: var(--color-border-light);
  display: block;
  text-decoration: none;
  color: inherit;
  transition: box-shadow var(--transition);
}

.collection-card:hover {
  box-shadow: var(--shadow-card-hover);
}

.collection-card__image-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--color-border-light);
}

.collection-card__image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.collection-card:hover .collection-card__image-wrap img {
  transform: scale(1.04);
}

.collection-card__placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-border-light);
  color: var(--color-text-light);
  font-size: 2.5rem;
}

.collection-card__info {
  padding: 1.25rem;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border-light);
}

.collection-card__name {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 500;
  margin-bottom: 0.375rem;
}

.collection-card__count {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}

.collection-card__desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ── Skeleton Loading ── */
.skeleton {
  background: linear-gradient(90deg, var(--color-border-light) 25%, var(--color-border) 50%, var(--color-border-light) 75%);
  background-size: 400% 100%;
  animation: skeleton-shimmer 1.4s ease infinite;
  display: block;
}

@keyframes skeleton-shimmer {
  0% { background-position: 100% 0; }
  100% { background-position: -100% 0; }
}

.skeleton-card {
  overflow: hidden;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
}

.skeleton-card .skeleton-img {
  aspect-ratio: 3 / 4;
  width: 100%;
}

.skeleton-card .skeleton-text {
  height: 1rem;
  margin: 1rem;
  border-radius: 2px;
}

.skeleton-card .skeleton-text.short {
  width: 60%;
  height: 0.75rem;
  margin-top: 0.5rem;
  margin-bottom: 1rem;
}

/* ── Loading Spinner ── */
.loading-spinner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4rem 2rem;
}

.loading-spinner::after {
  content: '';
  width: 36px;
  height: 36px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-text);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ── State Messages ── */
.state-empty,
.state-error {
  text-align: center;
  padding: 5rem 2rem;
  color: var(--color-text-muted);
}

.state-empty__icon,
.state-error__icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  display: block;
}

.state-empty h3,
.state-error h3 {
  font-family: var(--font-heading);
  font-size: 1.375rem;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.state-empty p,
.state-error p {
  font-size: 0.9375rem;
  max-width: 400px;
  margin-inline: auto;
}

.state-error {
  color: var(--color-error);
}

/* ── Toast Notifications ── */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1.25rem;
  background: var(--color-text);
  color: rgba(255, 255, 255, 0.92);
  font-size: 0.875rem;
  min-width: 240px;
  max-width: 400px;
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  animation: toast-in 0.25s ease forwards;
}

.toast.success { background: var(--color-success); }
.toast.error   { background: var(--color-error); }
.toast.warning { background: var(--color-warning); color: #fff; }

.toast.toast-out {
  animation: toast-out 0.25s ease forwards;
}

@keyframes toast-in {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes toast-out {
  from { opacity: 1; transform: translateY(0); }
  to   { opacity: 0; transform: translateY(12px); }
}

/* ── Section Headings ── */
.section-header {
  margin-bottom: 3rem;
}

.section-header--centered {
  text-align: center;
}

.section-eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 0.625rem;
  display: block;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.section-desc {
  margin-top: 0.875rem;
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  max-width: 56ch;
  line-height: 1.65;
}

.section-header--centered .section-desc {
  margin-inline: auto;
}

/* ── Hero ── */
.hero {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border-light);
  padding: clamp(5rem, 12vw, 9rem) 0 clamp(4rem, 10vw, 7rem);
  text-align: center;
}

/* Legacy elements — kept in DOM but hidden so JS that references them causes no errors */
.hero__bg,
.hero__overlay {
  display: none;
}

.hero__content {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.hero__eyebrow {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  display: block;
}

.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(3rem, 8vw, 6.5rem);
  font-weight: 400;
  letter-spacing: -0.03em;
  line-height: 1.02;
  color: var(--color-text);
  max-width: 14ch;
  margin-inline: auto;
  margin-bottom: 1.75rem;
}

.hero__title em {
  font-style: italic;
  font-weight: 400;
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.1875rem);
  color: var(--color-text-muted);
  max-width: 46ch;
  margin-inline: auto;
  line-height: 1.7;
  margin-bottom: 3rem;
}

.hero__cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

.hero__cta .btn {
  background: var(--color-accent);
  color: #ffffff;
  border-color: var(--color-accent);
}

.hero__cta .btn:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

.hero__cta .btn-outline {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.hero__cta .btn-outline:hover {
  background: var(--color-accent);
  color: #ffffff;
}

/* Hero rule — thin decorative separator below eyebrow */
.hero__rule {
  width: 2.5rem;
  height: 1px;
  background: var(--color-border);
  margin: 0 auto 1.75rem;
  display: block;
}

.hero--simple {
  min-height: unset;
  padding: 3.5rem 0 2.75rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border-light);
}

.hero--simple .hero__content {
  text-align: left;
}

.hero--simple .hero__title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  max-width: none;
  margin-inline: 0;
}

/* ── Featured / Section Layouts ── */
.section {
  padding-block: 5rem;
}

.section--alt {
  background: var(--color-surface);
}

.section--tight {
  padding-block: 3rem;
}

/* ── Page Header (non-hero) ── */
.page-header {
  padding: 3.5rem var(--container-pad) 2.5rem;
  max-width: var(--container-max);
  margin-inline: auto;
  border-bottom: 1px solid var(--color-border-light);
  margin-bottom: 3rem;
}

.page-header__eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 0.625rem;
}

.page-header__title {
  font-family: var(--font-heading);
  font-size: clamp(1.875rem, 4vw, 3rem);
  font-weight: 500;
  letter-spacing: -0.02em;
}

.page-header__desc {
  margin-top: 0.75rem;
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  max-width: 56ch;
}

/* ── Filter Bar ── */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border-light);
}

.filter-btn {
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 0.4rem 1rem;
  color: var(--color-text-muted);
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  color: var(--color-text);
  border-color: var(--color-border);
}

.filter-btn.active {
  color: var(--color-text);
  border-color: var(--color-text);
}

.filter-select {
  font-size: 0.8125rem;
  padding: 0.4rem 2rem 0.4rem 0.875rem;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M6 8L1 3h10z' fill='%236b6864'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.625rem center;
  -webkit-appearance: none;
  cursor: pointer;
}

/* ── Load More ── */
.load-more-wrap {
  text-align: center;
  margin-top: 3.5rem;
}

/* ── Painting Detail ── */
.painting-detail {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 4rem;
  align-items: start;
  max-width: var(--container-max);
  margin-inline: auto;
  padding: 3rem var(--container-pad);
}

.painting-detail__image-wrap {
  position: sticky;
  top: calc(var(--nav-height) + 2rem);
}

.painting-detail__image-wrap img {
  width: 100%;
  height: auto;
  max-height: 80vh;
  object-fit: contain;
  background: var(--color-border-light);
}

.painting-detail__info {
  padding-top: 0.5rem;
}

.painting-detail__title {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
  line-height: 1.15;
}

.painting-detail__meta {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--color-border-light);
}

.painting-detail__meta-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
}

.painting-detail__meta-label {
  color: var(--color-text-muted);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.painting-detail__meta-value {
  color: var(--color-text);
  font-weight: 500;
  text-align: right;
}

.painting-detail__desc {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
}

.painting-detail__price-section {
  padding: 1.5rem;
  background: var(--color-accent-light);
  border: 1px solid var(--color-border);
  margin-bottom: 1.5rem;
}

.painting-detail__price-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 0.375rem;
}

.painting-detail__price {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 1rem;
}

.painting-detail__back {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  margin-bottom: 2rem;
}

.painting-detail__back:hover {
  color: var(--color-text);
}

.painting-detail__back::before {
  content: '←';
}

/* ── About Page ── */
.about-layout {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 5rem;
  max-width: var(--container-max);
  margin-inline: auto;
  padding: 4rem var(--container-pad);
  align-items: start;
}

.about-image-wrap {
  position: sticky;
  top: calc(var(--nav-height) + 2rem);
}

.about-image-wrap img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.about-image-placeholder {
  width: 100%;
  aspect-ratio: 3 / 4;
  background: var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
  font-size: 3rem;
}

.about-content h1 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.about-content .location {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin-bottom: 2.5rem;
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.about-section {
  margin-bottom: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--color-border-light);
}

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

.about-section h2 {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 500;
  margin-bottom: 1rem;
  color: var(--color-text-muted);
  font-style: italic;
}

.about-section p {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text-muted);
}

.about-section p + p {
  margin-top: 1rem;
}

.about-social {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.about-social a {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 1px;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.about-social a:hover {
  color: var(--color-text);
  border-color: var(--color-text);
}

/* ── Contact ── */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 480px;
  gap: 5rem;
  max-width: var(--container-max);
  margin-inline: auto;
  padding: 4rem var(--container-pad);
  align-items: start;
}

.contact-info h1 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.contact-info p {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 40ch;
  margin-bottom: 2.5rem;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.contact-detail-item {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
}

.contact-detail-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.contact-detail-value {
  font-size: 0.9375rem;
  color: var(--color-text);
}

.contact-detail-value a:hover {
  text-decoration: underline;
}

.contact-form-wrap {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  padding: 2.5rem;
}

.contact-form-wrap h2 {
  font-family: var(--font-heading);
  font-size: 1.375rem;
  font-weight: 500;
  margin-bottom: 1.75rem;
}

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

/* ── Login Page ── */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  padding: 2rem;
}

.login-box {
  width: 100%;
  max-width: 400px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 2.5rem;
}

.login-box__logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 0.375rem;
  display: block;
}

.login-box__tagline {
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 1.125rem;
}

.login-form .btn {
  width: 100%;
  margin-top: 0.25rem;
}

/* ── 404 Page ── */
.not-found {
  min-height: calc(100vh - var(--nav-height) - 200px);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem var(--container-pad);
}

.not-found__code {
  font-family: var(--font-heading);
  font-size: clamp(6rem, 20vw, 12rem);
  font-weight: 400;
  line-height: 1;
  color: var(--color-border);
  display: block;
  margin-bottom: 1rem;
}

.not-found__title {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 500;
  margin-bottom: 0.75rem;
}

.not-found__text {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-bottom: 2.5rem;
  max-width: 40ch;
  margin-inline: auto;
  margin-bottom: 2.5rem;
}

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

.text-muted { color: var(--color-text-muted); }
.text-center { text-align: center; }
.text-small { font-size: 0.875rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.625rem;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

.badge-status {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.badge-status.published { background: var(--color-success-bg); color: var(--color-success); }
.badge-status.draft     { background: var(--color-warning-bg); color: var(--color-warning); }
.badge-status.archived  { background: var(--color-border-light); color: var(--color-text-muted); }

/* ── Divider ── */
.divider {
  border: none;
  border-top: 1px solid var(--color-border-light);
  margin-block: 2rem;
}

/* ── Related Paintings ── */
.related-section {
  padding: 4rem var(--container-pad);
  max-width: var(--container-max);
  margin-inline: auto;
  border-top: 1px solid var(--color-border-light);
}

/* ── Scroll Reveal ── */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   Responsive Breakpoints
   ============================================================ */

/* ── Tablet ── */
@media (max-width: 1024px) {
  .painting-detail {
    grid-template-columns: 1fr;
    max-width: 680px;
    gap: 2.5rem;
  }

  .painting-detail__image-wrap {
    position: static;
  }

  .about-layout {
    grid-template-columns: 280px 1fr;
    gap: 3rem;
  }

  .contact-layout {
    grid-template-columns: 1fr;
    gap: 3rem;
    max-width: 600px;
  }
}

/* ── Mobile ── */
@media (max-width: 768px) {
  :root {
    --nav-height: 60px;
  }

  .main-nav {
    padding-inline: 1.25rem;
  }

  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem 0 1rem;
    display: none;
    z-index: 99;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
  }

  .nav-links a.active::after {
    display: none;
  }

  .nav-links .nav-admin-link {
    margin: 0.5rem 1.5rem 0;
    text-align: center;
  }

  .nav-hamburger {
    display: flex;
  }

  .nav-logo {
    font-size: 1.2rem;
  }

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

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

  .hero__title {
    font-size: clamp(2.5rem, 12vw, 4rem);
  }

  .about-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .about-image-wrap {
    position: static;
    max-width: 280px;
  }

  .painting-detail {
    padding: 1.5rem var(--container-pad);
  }

  .contact-form-wrap {
    padding: 1.75rem;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }

  .footer-links {
    align-items: flex-start;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 1rem;
  }

  .main-footer {
    margin-top: 4rem;
  }

  .section {
    padding-block: 3.5rem;
  }
}

/* ── Small Mobile ── */
@media (max-width: 480px) {
  .paintings-grid {
    grid-template-columns: 1fr;
  }

  .hero__cta {
    flex-direction: column;
  }

  .hero__cta .btn {
    width: 100%;
    justify-content: center;
  }

  .login-box {
    padding: 1.75rem;
  }
}