/* ============================================
   Neo-Archivist Design System
   Personal Library Cataloging & Inventory
   ============================================ */

:root {
  /* Color Palette */
  --color-bg-primary: #0F1215;
  --color-accent-vellum: #BFA181;
  --color-accent-mint: #4ADE80;
  --color-neutral-graphite: #2D3436;
  --color-text-primary: #E8E6E3;
  --color-text-secondary: #B8B5B2;
  --color-glass-bg: rgba(15, 18, 21, 0.6);
  --color-glass-border: rgba(191, 161, 129, 0.2);
  
  /* Typography */
  --font-heading: 'Fraunces', serif;
  --font-body: 'Inter', sans-serif;
  --font-data: 'JetBrains Mono', monospace;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  
  /* Layout */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  
  /* Effects */
  --blur-sm: blur(8px);
  --blur-md: blur(16px);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* ============================================
   Reset & Base Styles
   ============================================ */

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

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

body {
  font-family: var(--font-body);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--space-md);
  color: var(--color-text-primary);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.75rem);
}

p {
  margin-bottom: var(--space-md);
  color: var(--color-text-secondary);
}

a {
  color: var(--color-accent-vellum);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-mint);
}

/* ============================================
   Header & Navigation
   ============================================ */

.site-header {
  position: relative;
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-glass-bg);
  backdrop-filter: var(--blur-md);
  border-bottom: 1px solid var(--color-glass-border);
  z-index: 1000;
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.brand-name {
  font-family: var(--font-heading);
  font-size: clamp(1rem, 2vw, 1.35rem);
  font-weight: 600;
  color: var(--color-accent-vellum);
}

.main-navigation {
  display: flex;
  gap: 15px;
  align-items: center;
  flex-wrap: wrap;
}

.nav-link {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
}

.nav-link:hover {
  color: var(--color-accent-vellum);
  background: rgba(191, 161, 129, 0.1);
}

/* Burger Menu */
.burger-toggle {
  background: transparent;
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-sm);
  padding: var(--space-sm);
  cursor: pointer;
  color: var(--color-text-primary);
  font-size: 1.5rem;
  width: 44px;
  z-index: 10001;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
  flex-shrink: 0;
}

.burger-toggle:hover {
  background: rgba(191, 161, 129, 0.1);
  border-color: var(--color-accent-vellum);
}

.burger-menu {
  display: none;
  position: fixed;
  top: 0;
  right: 0;
  width: 100%;
  max-width: 320px;
  height: 100vh;
  background: var(--color-bg-primary);
  border-left: 1px solid var(--color-glass-border);
  padding: var(--space-xl) var(--space-lg);
  z-index: 2000;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform var(--transition-base);
}

.burger-menu.active {
  transform: translateX(0);
}

.burger-close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: transparent;
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-sm);
  padding: var(--space-sm);
  cursor: pointer;
  color: var(--color-text-primary);
  font-size: 1.5rem;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
}

.burger-close:hover {
  background: rgba(191, 161, 129, 0.1);
  border-color: var(--color-accent-vellum);
}

.burger-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

.burger-nav-link {
  font-size: 1.1rem;
  color: var(--color-text-primary);
  padding: var(--space-md);
  border-bottom: 1px solid var(--color-neutral-graphite);
  transition: all var(--transition-base);
}

.burger-nav-link:hover {
  color: var(--color-accent-vellum);
  padding-left: var(--space-lg);
}

@media (min-width: 1024px) {
  .burger-toggle {
    display: none;
  }
}

@media (max-width: 1023px) {
  .main-navigation {
    display: none;
  }
  
  .burger-menu,
  .burger-menu-overlay {
    display: block;
  }
}

/* ============================================
   Hero Banners
   ============================================ */

.hero-banner {
  width: 100vw;
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-left: calc(-50vw + 50%);
  margin-right: calc(-50vw + 50%);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  padding: var(--space-xl) var(--space-lg);
  text-align: center;
  width: 100%;
  background: rgba(15, 18, 21, 0.7);
  backdrop-filter: blur(4px);
  border-radius: var(--radius-lg);
  margin: 0 auto;
}

.hero-text {
  margin-bottom: var(--space-xl);
}

.hero-image {
  display: none;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  margin-bottom: var(--space-lg);
  background: linear-gradient(135deg, var(--color-accent-vellum), var(--color-accent-mint));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--color-text-secondary);
  max-width: 800px;
  margin: 0 auto;
}

/* ============================================
   Main Content
   ============================================ */

main {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
}

.content-section {
  margin-bottom: var(--space-2xl);
  padding: var(--space-xl) 0;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  width: 100%;
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-xl);
  position: relative;
  padding-bottom: var(--space-md);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-accent-vellum), transparent);
}

/* ============================================
   Glass Cards
   ============================================ */

.glass-card {
  background: var(--color-glass-bg);
  backdrop-filter: var(--blur-md);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-md);
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent-vellum);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

/* ============================================
   Data Visualization
   ============================================ */

.data-display {
  font-family: var(--font-data);
  font-size: 0.9rem;
  color: var(--color-accent-mint);
  background: rgba(74, 222, 128, 0.1);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--color-accent-mint);
  margin: var(--space-sm) 0;
}

.data-label {
  color: var(--color-text-secondary);
  font-size: 0.85rem;
  margin-bottom: var(--space-xs);
}

/* ============================================
   Forms
   ============================================ */

.form-container {
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--space-sm);
  color: var(--color-text-primary);
  font-size: 0.95rem;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-md);
  background: var(--color-glass-bg);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: all var(--transition-base);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-accent-vellum);
  box-shadow: 0 0 0 3px rgba(191, 161, 129, 0.2);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.checkbox-input {
  margin-top: 4px;
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.checkbox-label {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.btn-primary {
  display: inline-block;
  padding: var(--space-md) var(--space-xl);
  background: linear-gradient(135deg, var(--color-accent-vellum), var(--color-accent-mint));
  color: var(--color-bg-primary);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  text-align: center;
  margin-top: 10px;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(191, 161, 129, 0.4);
}

/* ============================================
   Ghost Shelf Interactive
   ============================================ */

.ghost-shelf {
  background: var(--color-glass-bg);
  backdrop-filter: var(--blur-md);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin: var(--space-2xl) 0;
}

.ghost-shelf-form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.ghost-result {
  margin-top: var(--space-xl);
  padding: var(--space-lg);
  background: rgba(74, 222, 128, 0.1);
  border: 1px solid var(--color-accent-mint);
  border-radius: var(--radius-md);
  display: none;
}

.ghost-result.active {
  display: block;
}

.node-visualization {
  display: flex;
  justify-content: space-around;
  align-items: center;
  margin: var(--space-lg) 0;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.node {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--color-glass-bg);
  border: 2px solid var(--color-accent-vellum);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  text-align: center;
  position: relative;
}

.node::after {
  content: '';
  position: absolute;
  width: 2px;
  height: 40px;
  background: var(--color-accent-mint);
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
}

.node:last-child::after {
  display: none;
}

.suggestions-list {
  margin-top: var(--space-lg);
}

.suggestion-item {
  padding: var(--space-md);
  margin-bottom: var(--space-md);
  background: rgba(74, 222, 128, 0.05);
  border: 1px solid var(--color-accent-mint);
  border-radius: var(--radius-md);
}

.suggestion-item h4 {
  color: var(--color-accent-vellum);
  margin-bottom: var(--space-sm);
}

/* ============================================
   Timeline (Curation Services)
   ============================================ */

.timeline {
  position: relative;
  padding: var(--space-xl) 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-neutral-graphite);
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  margin-bottom: var(--space-2xl);
  display: flex;
  align-items: center;
}

.timeline-item:nth-child(odd) {
  flex-direction: row;
}

.timeline-item:nth-child(even) {
  flex-direction: row-reverse;
}

.timeline-content {
  width: 45%;
  padding: var(--space-lg);
  background: var(--color-glass-bg);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-lg);
}

.timeline-marker {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 20px;
  background: var(--color-accent-mint);
  border: 3px solid var(--color-bg-primary);
  border-radius: 50%;
  z-index: 2;
}

@media (max-width: 768px) {
  .timeline::before {
    left: 20px;
  }
  
  .timeline-item {
    flex-direction: row !important;
    padding-left: var(--space-xl);
  }
  
  .timeline-content {
    width: 100%;
  }
  
  .timeline-marker {
    left: 20px;
  }
}

/* ============================================
   Archive Interface
   ============================================ */

.filter-bar {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
  margin-bottom: var(--space-xl);
  padding: var(--space-lg);
  background: var(--color-glass-bg);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-lg);
}

.filter-btn {
  padding: var(--space-sm) var(--space-md);
  background: transparent;
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-base);
  font-family: var(--font-body);
  font-size: 0.9rem;
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--color-accent-vellum);
  color: var(--color-bg-primary);
  border-color: var(--color-accent-vellum);
}

.search-box {
  flex: 1;
  min-width: 200px;
}

.archive-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--space-lg);
}

.archive-item {
  background: var(--color-glass-bg);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  transition: all var(--transition-base);
}

.archive-item:hover {
  transform: translateY(-4px);
  border-color: var(--color-accent-vellum);
  box-shadow: var(--shadow-md);
}

/* ============================================
   Valuation Report
   ============================================ */

.report-container {
  background: var(--color-glass-bg);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin: var(--space-xl) 0;
}

.report-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-neutral-graphite);
}

.report-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
  margin: var(--space-xl) 0;
}

.metric-card {
  background: rgba(191, 161, 129, 0.1);
  border: 1px solid var(--color-accent-vellum);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  text-align: center;
}

.metric-value {
  font-family: var(--font-data);
  font-size: 2rem;
  color: var(--color-accent-mint);
  margin-bottom: var(--space-sm);
}

.metric-label {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

/* ============================================
   Google Maps
   ============================================ */

.map-container {
  width: 100%;
  height: 400px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: var(--space-xl) 0;
  border: 1px solid var(--color-glass-border);
}

.map-container iframe {
  width: 100%;
  height: 100%;
  border: none;
}

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

.site-footer {
  background: var(--color-glass-bg);
  border-top: 1px solid var(--color-glass-border);
  padding: var(--space-xl) var(--space-lg);
  margin-top: var(--space-2xl);
}

.footer-container {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-xl);
}

.footer-section h3 {
  font-size: 1.1rem;
  margin-bottom: var(--space-md);
  color: var(--color-accent-vellum);
}

.footer-menu {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-menu a {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

.footer-menu a:hover {
  color: var(--color-accent-vellum);
}

.footer-contact {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.footer-bottom {
  text-align: center;
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-neutral-graphite);
  color: var(--color-text-secondary);
  font-size: 0.85rem;
}

/* ============================================
   Privacy Policy Popup
   ============================================ */

.privacy-popup {
  display: none;
  position: fixed;
  bottom: var(--space-lg);
  left: var(--space-lg);
  right: var(--space-lg);
  max-width: 500px;
  background: var(--color-glass-bg);
  backdrop-filter: var(--blur-md);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  z-index: 3000;
  box-shadow: var(--shadow-lg);
}

.privacy-popup.active {
  display: block;
}

.privacy-popup-content {
  margin-bottom: var(--space-md);
}

.privacy-popup-actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* ============================================
   Image Styles
   ============================================ */

.content-image {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  margin: var(--space-lg) 0;
  object-fit: cover;
  box-shadow: var(--shadow-md);
}

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-md);
  margin: var(--space-xl) auto;
  max-width: 1000px;
  padding: 0 var(--space-md);
}

.image-grid-item {
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

.image-grid-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-grid-item {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base);
}

.image-grid-item:hover {
  transform: scale(1.05);
}

.image-grid-item img {
  width: 100%;
  height: auto;
  display: block;
}

/* ============================================
   Utility Classes
   ============================================ */

.text-center {
  text-align: center;
}

.mt-lg {
  margin-top: var(--space-lg);
}

.mb-lg {
  margin-bottom: var(--space-lg);
}

.date {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-style: italic;
}

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

@media (max-width: 768px) {
  :root {
    --space-xl: 2rem;
    --space-2xl: 3rem;
  }
  
  .hero-banner {
    min-height: 50vh;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  .ghost-shelf-form {
    grid-template-columns: 1fr;
  }
  
  .filter-bar {
    flex-direction: column;
  }
  
  .footer-container {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .site-header {
    padding: var(--space-md);
  }
  
  main {
    padding: var(--space-lg) var(--space-md);
  }
  
  .hero-content {
    padding: var(--space-lg) var(--space-md);
  }
  
  .privacy-popup {
    left: var(--space-md);
    right: var(--space-md);
    bottom: var(--space-md);
  }
}

@media (max-width: 320px) {
  html {
    font-size: 14px;
  }
  
  .hero-banner {
    min-height: 40vh;
  }
}

/* ============================================
   Animations
   ============================================ */

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.6s ease-out;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.6;
  }
}

.pulse {
  animation: pulse 2s ease-in-out infinite;
}