/* CSS VARIABLES - Premium Color Palette */
:root {
  --bg-primary: #fcfbfa;
  --bg-secondary: #f4f1eb;
  --text-primary: #2d312e;
  --text-secondary: #606662;
  
  /* Sage & Champagne Gold Accents */
  --accent-color: #8ca59c; /* Soft sage green */
  --accent-color-hover: #738c83;
  --gold-color: #d1bfa7; /* Soft champagne gold */
  --gold-color-hover: #bda88e;
  
  --danger-color: #c97a7a;
  --success-color: #79a68a;
  
  --glass-bg: rgba(255, 255, 255, 0.65);
  --glass-border: rgba(255, 255, 255, 0.8);
  --glass-shadow: 0 8px 32px 0 rgba(140, 165, 156, 0.08);
  
  --border-radius-sm: 8px;
  --border-radius-md: 16px;
  --border-radius-lg: 24px;
  
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.2s ease;
}

/* Base resets & layout */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Dreamy glowing background blobs */
.bg-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  z-index: -1;
  opacity: 0.45;
  pointer-events: none;
}

.bg-glow-1 {
  width: 40vw;
  height: 40vw;
  background-color: rgba(209, 191, 167, 0.3); /* Champagne */
  top: -10%;
  right: -5%;
}

.bg-glow-2 {
  width: 50vw;
  height: 50vw;
  background-color: rgba(140, 165, 156, 0.2); /* Sage */
  bottom: -10%;
  left: -10%;
}

/* Containers & Structures */
.app-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 40px 20px;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

/* Typography styles */
.serif-title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 2.8rem;
  line-height: 1.2;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 600px;
  margin: 0 auto;
}

/* Glassmorphism styling */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: var(--border-radius-lg);
}

/* Header Styles */
.app-header {
  text-align: center;
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  position: relative;
}

.header-tag {
  display: inline-block;
  padding: 6px 14px;
  background-color: rgba(140, 165, 156, 0.12);
  color: var(--accent-color);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: 50px;
}

.logout-btn {
  position: absolute;
  top: 0;
  right: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  transition: var(--transition-smooth);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--accent-color);
  color: white;
  box-shadow: 0 4px 14px rgba(140, 165, 156, 0.3);
}

.btn-primary:hover {
  background-color: var(--accent-color-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(140, 165, 156, 0.4);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background-color: rgba(0, 0, 0, 0.05);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background-color: rgba(0, 0, 0, 0.08);
}

.btn-lightbox-download {
  background-color: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-lightbox-download:hover {
  background-color: rgba(255, 255, 255, 0.35);
  transform: translateY(-2px);
}

/* Section Title layout */
.section-title-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.section-title-wrapper h2 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 500;
}

.icon-accent {
  font-size: 1.4rem;
  color: var(--accent-color);
}

/* Upload Section */
.upload-section {
  padding: 30px;
}

.drop-zone {
  border: 2px dashed rgba(140, 165, 156, 0.35);
  border-radius: var(--border-radius-md);
  padding: 40px 20px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: rgba(255, 255, 255, 0.25);
  transition: var(--transition-smooth);
  cursor: pointer;
}

.drop-zone.dragover {
  border-color: var(--accent-color);
  background-color: rgba(140, 165, 156, 0.08);
  transform: scale(0.99);
}

.drop-icon {
  font-size: 3rem;
  color: var(--accent-color);
  margin-bottom: 16px;
  opacity: 0.8;
  transition: transform 0.3s ease;
}

.drop-zone:hover .drop-icon {
  transform: translateY(-5px);
}

.drop-zone h3 {
  font-size: 1.25rem;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.drop-or {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 8px 0;
  position: relative;
  width: 100%;
  max-width: 180px;
}

.drop-or::before, .drop-or::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 35%;
  height: 1px;
  background-color: rgba(0, 0, 0, 0.08);
}

.drop-or::before { left: 0; }
.drop-or::after { right: 0; }

.btn-upload-label {
  padding: 10px 24px;
}

.hidden-input {
  display: none;
}

.upload-note {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 14px;
}

/* Upload Queue/Progress */
.upload-queue-container {
  margin-top: 24px;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  padding-top: 20px;
}

.upload-queue-container h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.upload-queue {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.queue-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 16px;
  background-color: white;
  padding: 12px;
  border-radius: var(--border-radius-sm);
  border: 1px solid rgba(0, 0, 0, 0.04);
}

.queue-thumb {
  width: 44px;
  height: 44px;
  object-fit: cover;
  border-radius: 6px;
  background-color: var(--bg-secondary);
}

.queue-details {
  display: flex;
  flex-direction: column;
  gap: 4px;
  overflow: hidden;
}

.queue-name {
  font-size: 0.85rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.progress-bar-container {
  background-color: var(--bg-secondary);
  height: 6px;
  border-radius: 10px;
  overflow: hidden;
}

.progress-bar {
  background-color: var(--accent-color);
  width: 0%;
  height: 100%;
  border-radius: 10px;
  transition: width 0.1s linear;
}

.queue-status {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.queue-status.success { color: var(--success-color); }
.queue-status.error { color: var(--danger-color); }

/* Gallery Section Layout */
.gallery-section {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.gallery-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.gallery-header .section-title-wrapper {
  margin-bottom: 0;
}

.photo-count {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  background-color: var(--bg-secondary);
  padding: 6px 12px;
  border-radius: 20px;
}

/* Empty State */
.gallery-empty {
  text-align: center;
  padding: 80px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.empty-icon {
  font-size: 3rem;
  color: var(--gold-color);
  margin-bottom: 8px;
}

.gallery-empty h3 {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 500;
}

.gallery-empty p {
  color: var(--text-secondary);
}

/* Gallery Grid & Masonry Cards */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

@media (min-width: 600px) {
  .gallery-grid {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
  }
}

.gallery-card {
  position: relative;
  border-radius: var(--border-radius-md);
  overflow: hidden;
  background-color: var(--bg-secondary);
  box-shadow: 0 4px 10px rgba(0,0,0,0.02);
  cursor: pointer;
  aspect-ratio: 1 / 1;
  transition: var(--transition-smooth);
}

.gallery-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(140,165,156,0.15);
}

.gallery-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-smooth);
  opacity: 0; /* Animated fade-in with lazy load */
}

.gallery-img.loaded {
  opacity: 1;
}

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

/* Hover overlay on cards */
.gallery-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.4), transparent 50%);
  opacity: 0;
  transition: var(--transition-smooth);
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  padding: 16px;
}

.gallery-card:hover .gallery-card-overlay {
  opacity: 1;
}

.zoom-indicator {
  color: white;
  font-size: 1.2rem;
  transform: translateY(10px);
  transition: var(--transition-smooth);
}

.gallery-card:hover .zoom-indicator {
  transform: translateY(0);
}

/* Authentication Overlay & Box */
.overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(250, 247, 242, 0.85);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  transition: opacity 0.4s ease;
}

.login-card {
  width: 100%;
  max-width: 440px;
  padding: 40px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.login-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.auth-icon {
  font-size: 2.2rem;
  color: var(--accent-color);
  margin-bottom: 8px;
}

.login-header h2 {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 500;
}

.login-header p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.input-group input {
  padding: 14px 20px;
  border-radius: 50px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  font-family: var(--font-sans);
  font-size: 1rem;
  text-align: center;
  background-color: white;
  transition: var(--transition-fast);
  outline: none;
}

.input-group input:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(140, 165, 156, 0.15);
}

.error-msg {
  color: var(--danger-color);
  font-size: 0.85rem;
  font-weight: 500;
  margin-top: 4px;
}

.hidden {
  display: none !important;
  opacity: 0;
  pointer-events: none;
}

/* Fullscreen Lightbox */
.lightbox-overlay {
  background-color: rgba(18, 20, 19, 0.98);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.lightbox-content {
  max-width: 90%;
  max-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-content img {
  max-width: 100%;
  max-height: 80vh;
  object-fit: contain;
  border-radius: 4px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.5);
  animation: lightboxFadeIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes lightboxFadeIn {
  from {
    transform: scale(0.95);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 24px;
  background: none;
  border: none;
  color: rgba(255,255,255,0.7);
  font-size: 2rem;
  cursor: pointer;
  transition: var(--transition-fast);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.lightbox-close:hover {
  color: white;
  background-color: rgba(255,255,255,0.1);
  transform: rotate(90deg);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: rgba(255,255,255,0.6);
  font-size: 2rem;
  cursor: pointer;
  transition: var(--transition-fast);
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.lightbox-nav:hover {
  color: white;
  background-color: rgba(255,255,255,0.1);
}

.lightbox-prev { left: 24px; }
.lightbox-next { right: 24px; }

@media (max-width: 768px) {
  .lightbox-nav {
    display: none; /* Hide buttons on mobile - swipe is expected or tap corners */
  }
}

.lightbox-actions {
  position: absolute;
  bottom: 30px;
  display: flex;
  gap: 16px;
}

/* Footer styling */
.app-footer {
  text-align: center;
  margin-top: 40px;
  padding: 20px 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
  border-top: 1px solid rgba(0, 0, 0, 0.04);
}

/* Bounce Micro-Animation */
@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
    animation-timing-function: cubic-bezier(0.8,0,1,1);
  }
  50% {
    transform: translateY(-6px);
    animation-timing-function: cubic-bezier(0,0,0.2,1);
  }
}

.animate-bounce {
  animation: bounce 2s infinite;
}