/* Paintings Catalog - Mobile-first responsive styles */

:root {
  --color-bg: #faf9f7;
  --color-text: #2c2c2c;
  --color-muted: #666;
  --color-accent: #4a6fa5;
  --color-accent-hover: #3d5d8a;
  --color-border: #e0ddd9;
  --color-card-bg: #fff;
  --font-sans: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --spacing-sm: 0.75rem;
  --spacing-md: 1.25rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --radius: 8px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding-top: 4rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--color-card-bg);
  border-bottom: 1px solid var(--color-border);
}

.logo {
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--color-text);
  text-decoration: none;
}

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

.nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.nav-link {
  color: var(--color-text);
  text-decoration: none;
}

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

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--radius);
  cursor: pointer;
  border: none;
  min-height: 44px;
  min-width: 44px;
}

.btn-contact {
  background: var(--color-accent);
  color: #fff;
}

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

/* Contact section */
.contact-section {
  padding: var(--spacing-xl) var(--spacing-md);
  margin-top: var(--spacing-xl);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.contact-section h1 {
  margin: 0 0 var(--spacing-lg);
  font-size: 1.75rem;
}

.contact-content {
  font-size: 1rem;
}

.contact-details p {
  margin: 0 0 var(--spacing-sm);
}

.contact-details a {
  color: var(--color-accent);
  text-decoration: none;
}

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

.social-links {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.social-links a {
  padding: 0.25rem 0;
}

/* Scroll hint */
.scroll-hint {
  text-align: center;
  padding: var(--spacing-md) var(--spacing-lg);
  color: var(--color-muted);
  font-size: 0.9375rem;
}

.scroll-hint p {
  margin: 0 0 0.5rem;
}

.scroll-chevron {
  display: inline-block;
  font-size: 1.5rem;
  animation: bounce 1.5s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* Catalog section */
.catalog-section {
  padding: var(--spacing-md) var(--spacing-md) var(--spacing-xl);
}

.catalog-section h1,
.catalog-section h2 {
  margin: 0 0 var(--spacing-md);
  font-size: 1.5rem;
}

.catalog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

/* Painting card */
.painting-card {
  background: var(--color-card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  border: 1px solid var(--color-border);
}

.card-image-wrap {
  cursor: pointer;
}

.painting-card img {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.card-placeholder {
  width: 100%;
  aspect-ratio: 4 / 3;
  background: var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-muted);
  font-size: 0.875rem;
}

.card-body {
  padding: var(--spacing-md);
}

.card-body h3 {
  margin: 0 0 0.5rem;
  font-size: 1.125rem;
}

.card-body p {
  margin: 0 0 0.25rem;
  font-size: 0.9375rem;
  color: var(--color-muted);
}

.card-price {
  margin-top: var(--spacing-sm) !important;
  font-weight: 600;
  color: var(--color-text) !important;
}

/* Image modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);
}

.modal[hidden] {
  display: none;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  cursor: pointer;
}

.modal-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
}

.modal-image {
  max-width: 100%;
  max-height: 85vh;
  display: block;
  object-fit: contain;
}

.modal-close {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  font-size: 1.75rem;
  line-height: 1;
  color: #fff;
  background: rgba(0, 0, 0, 0.5);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  z-index: 1;
}

.modal-close:hover {
  background: rgba(0, 0, 0, 0.7);
}

/* Tablet: 2 columns */
@media (min-width: 768px) {
  .header {
    padding: var(--spacing-md) var(--spacing-lg);
  }

  .contact-section {
    padding: var(--spacing-lg) var(--spacing-lg);
  }

  .contact-section h1 {
    margin: 0 0 var(--spacing-md);
    font-size: 1.5rem;
  }

  .contact-details p {
    margin: 0 0 0.25rem;
  }

  .contact-details {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0 1.5rem;
  }

  .social-links {
    margin-top: var(--spacing-sm);
  }

  .scroll-hint {
    padding: var(--spacing-sm) var(--spacing-lg);
  }

  .catalog-section {
    padding: var(--spacing-md) var(--spacing-lg);
  }

  .catalog-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
  }
}

/* Desktop: 3 columns */
@media (min-width: 1024px) {
  .contact-section {
    padding: var(--spacing-md) var(--spacing-lg);
    max-width: 480px;
  }

  .contact-section h1 {
    margin: 0 0 var(--spacing-sm);
    font-size: 1.375rem;
  }

  .scroll-hint {
    padding: var(--spacing-sm) var(--spacing-lg);
  }

  .catalog-section {
    padding: var(--spacing-md) var(--spacing-lg);
  }

  .catalog-grid {
    grid-template-columns: repeat(3, 1fr);
    max-width: 1200px;
    margin: 0 auto;
  }
}