/* ============================================
   PawPersona — Premium Art Gallery Aesthetic
   ============================================ */

/* --- Reset & Base --- */

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

:root {
  --color-bg: #F8F5FC;
  --color-bg-warm: #EDE4F5;
  --color-bg-warmest: #FCDDD3;
  --color-card: #FFFFFF;
  --color-text: #2D2640;
  --color-text-muted: #6B5F7A;
  --color-accent: #E8856C;
  --color-accent-hover: #D4704F;
  --color-accent-light: rgba(232, 133, 108, 0.12);
  --color-border: rgba(100, 60, 140, 0.08);

  --font-heading: 'Georgia', 'Times New Roman', serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;

  --shadow-card: 0 4px 20px rgba(100, 60, 140, 0.07), 0 1px 3px rgba(100, 60, 140, 0.04);
  --shadow-card-hover: 0 8px 32px rgba(100, 60, 140, 0.12), 0 2px 6px rgba(100, 60, 140, 0.06);
  --shadow-header: 0 1px 12px rgba(100, 60, 140, 0.06);

  --radius-card: 20px;
  --radius-pill: 100px;
  --radius-btn: 12px;

  --transition: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --max-width-text: 900px;
  --max-width-gallery: 1200px;
}

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

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

h1, h2, h3 {
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: 1.2;
}

/* --- Focus States --- */

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* --- Container --- */

.container {
  max-width: var(--max-width-text);
  margin: 0 auto;
  padding: 0 24px;
}

.gallery-container {
  max-width: var(--max-width-gallery);
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================
   Header — Glass Morphism
   ============================================ */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(248, 245, 252, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: var(--shadow-header);
}

.header-inner {
  max-width: var(--max-width-gallery);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  letter-spacing: 0.02em;
  color: var(--color-text);
  transition: color var(--transition);
}

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

.main-nav {
  display: flex;
  gap: 32px;
}

.main-nav a {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  letter-spacing: 0.01em;
  position: relative;
  transition: color var(--transition);
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition);
}

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

.main-nav a:hover::after {
  width: 100%;
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ============================================
   Hero — Dramatic, Full Viewport
   ============================================ */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  background: linear-gradient(
    160deg,
    var(--color-bg) 0%,
    var(--color-bg-warm) 50%,
    var(--color-bg-warmest) 100%
  );
  background-size: 200% 200%;
  animation: gradientShift 12s ease-in-out infinite alternate;
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  100% { background-position: 100% 50%; }
}

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

.hero h1 {
  font-size: clamp(2.8rem, 6vw, 5rem);
  letter-spacing: -0.01em;
  margin-bottom: 16px;
  color: var(--color-text);
}

.hero-tagline {
  font-family: var(--font-heading);
  font-size: clamp(1.2rem, 2.5vw, 1.6rem);
  color: var(--color-accent-hover);
  margin-bottom: 20px;
  font-style: italic;
}

.hero-description {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: var(--radius-btn);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--color-accent);
  color: #FFFFFF;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(232, 133, 108, 0.3);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}

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

.btn-large {
  padding: 18px 44px;
  font-size: 1.1rem;
}

/* ============================================
   How It Works
   ============================================ */

.how-it-works {
  padding: 100px 24px;
  text-align: center;
}

.how-it-works h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  margin-bottom: 60px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  max-width: var(--max-width-gallery);
  margin: 0 auto;
}

.step {
  padding: 24px 16px;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(123, 94, 167, 0.12);
  color: #7B5EA7;
  font-family: var(--font-heading);
  font-size: 1.4rem;
  margin-bottom: 20px;
}

.step h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.step p {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ============================================
   Styles Section — Filter Pills
   ============================================ */

.styles-section {
  padding: 80px 24px 40px;
  text-align: center;
}

.styles-section h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  margin-bottom: 36px;
}

.style-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.style-pill {
  padding: 10px 24px;
  border-radius: var(--radius-pill);
  border: 1.5px solid var(--color-border);
  background: var(--color-card);
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-family: var(--font-body);
  cursor: pointer;
  transition: all var(--transition);
  user-select: none;
}

.style-pill:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.style-pill.active {
  background: var(--color-accent);
  color: #FFFFFF;
  border-color: var(--color-accent);
}

/* ============================================
   Gallery — Hover-to-Reveal
   ============================================ */

.gallery-section {
  padding: 40px 0 100px;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

/* --- Card Container --- */

.gallery-card {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--color-card);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition);
}

.gallery-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

/* --- Image Stack --- */

.card-images {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  overflow: hidden;
}

.card-images img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.card-img-result {
  z-index: 2;
  opacity: 1;
  transition: opacity 400ms ease;
}

.card-img-original {
  z-index: 1;
  opacity: 1;
}

.gallery-card:hover .card-img-result,
.gallery-card.revealed .card-img-result {
  opacity: 0;
}

/* --- "Original" Label (visible on hover/tap) --- */

.card-reveal-label {
  position: absolute;
  bottom: 14px;
  left: 14px;
  z-index: 3;
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  color: #FFFFFF;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  pointer-events: none;
  opacity: 0;
  transition: opacity 400ms ease;
}

.gallery-card:hover .card-reveal-label,
.gallery-card.revealed .card-reveal-label {
  opacity: 1;
}

/* --- Style Badge & Title --- */

.card-style-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 5;
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  font-size: 0.78rem;
  color: var(--color-text);
  letter-spacing: 0.02em;
  pointer-events: none;
}

.card-title-bar {
  padding: 14px 18px;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  color: var(--color-text);
}

/* --- Filter Animation --- */

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

.gallery-card.fade-in {
  animation: cardFadeIn 300ms ease forwards;
}

@keyframes cardFadeIn {
  from {
    opacity: 0;
    transform: scale(0.96);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* ============================================
   CTA Banner
   ============================================ */

.cta-banner {
  padding: 100px 24px;
  text-align: center;
  background: linear-gradient(
    135deg,
    var(--color-bg-warm) 0%,
    var(--color-bg-warmest) 100%
  );
}

.cta-banner h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  margin-bottom: 12px;
}

.cta-banner p {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin-bottom: 36px;
}

/* ============================================
   Contact
   ============================================ */

.contact-section {
  padding: 100px 24px;
  text-align: center;
}

.contact-section h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  margin-bottom: 16px;
}

.contact-description {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  margin-bottom: 40px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.contact-links {
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 28px;
  border-radius: var(--radius-btn);
  background: var(--color-card);
  border: 1.5px solid var(--color-border);
  box-shadow: var(--shadow-card);
  font-size: 1rem;
  color: var(--color-text);
  transition: all var(--transition);
}

.contact-link:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}

.contact-icon {
  font-size: 1.3rem;
  color: var(--color-accent);
}

/* ============================================
   Footer
   ============================================ */

.site-footer {
  padding: 40px 24px;
  text-align: center;
  border-top: 1px solid var(--color-border);
}

.site-footer p {
  font-size: 0.88rem;
  color: var(--color-text-muted);
}

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

@media (max-width: 1024px) {
  .gallery-grid {
    gap: 22px;
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: 64px;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(248, 245, 252, 0.96);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 16px 24px 24px;
    gap: 4px;
    border-bottom: 1px solid var(--color-border);
  }

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

  .main-nav a {
    padding: 12px 0;
    font-size: 1.05rem;
  }

  .main-nav a::after {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.open span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

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

  .nav-toggle.open span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .hero {
    min-height: 85vh;
    padding: 100px 20px 60px;
  }

  .hero h1 {
    font-size: clamp(2.2rem, 8vw, 3rem);
  }

  .steps {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .contact-links {
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 480px) {
  .steps {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 280px;
  }

  .style-filters {
    gap: 8px;
  }

  .style-pill {
    padding: 8px 18px;
    font-size: 0.85rem;
  }
}