/* --------------------------------------------------------------------------
   DecodeME Brain Regions Analysis Hub - Core Stylesheet
   -------------------------------------------------------------------------- */

:root {
  --bg-primary: #0b0f19;
  --bg-secondary: #131a2c;
  --bg-tertiary: #1e293b;
  
  --color-text-main: #f8fafc;
  --color-text-muted: #94a3b8;
  
  --accent-purple: #8b5cf6;
  --accent-indigo: #6366f1;
  --accent-emerald: #10b981;
  --accent-cyan: #06b6d4;
  
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(99, 102, 241, 0.15);
  
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  
  --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--color-text-main);
  font-family: var(--font-sans);
  line-height: 1.5;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(139, 92, 246, 0.05) 0%, transparent 40%);
  background-attachment: fixed;
}

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

/* Header & Container */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
}

header {
  margin-bottom: 2.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 2rem;
  position: relative;
}

.header-logo-section {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.logo-badge {
  background: linear-gradient(135deg, var(--accent-indigo), var(--accent-purple));
  color: #fff;
  padding: 0.4rem 0.8rem;
  border-radius: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

h1 {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  background: linear-gradient(135deg, #ffffff 30%, #a5f3fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  color: var(--color-text-muted);
  font-size: 1.1rem;
  font-weight: 400;
  max-width: 800px;
  margin-top: 0.5rem;
}

/* Top Metrics */
.metrics-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.metric-card {
  background: rgba(30, 41, 59, 0.4);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.metric-card:hover {
  border-color: var(--accent-indigo);
  transform: translateY(-2px);
}

.metric-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: rgba(99, 102, 241, 0.1);
  color: var(--accent-indigo);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.metric-card.success .metric-icon {
  background: rgba(16, 185, 129, 0.1);
  color: var(--accent-emerald);
}

.metric-card.info .metric-icon {
  background: rgba(6, 182, 212, 0.1);
  color: var(--accent-cyan);
}

.metric-info h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

.metric-info p {
  font-size: 1.5rem;
  font-family: var(--font-display);
  font-weight: 700;
}

/* Tabs Navigation */
.tabs-nav {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  background: rgba(19, 26, 44, 0.6);
  padding: 0.5rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  width: max-content;
  max-width: 100%;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tab-btn:hover {
  color: var(--color-text-main);
  background: rgba(255, 255, 255, 0.04);
}

.tab-btn.active {
  color: #fff;
  background: linear-gradient(135deg, var(--accent-indigo), var(--accent-purple));
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

/* Tab Content */
.tab-content {
  display: none;
  animation: fadeIn 0.4s ease-out;
}

.tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Main Grid Layout */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 2rem;
}

@media (max-width: 1024px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
  .tabs-nav {
    width: 100%;
    overflow-x: auto;
  }
}

/* Card Component */
.card {
  background: rgba(19, 26, 44, 0.5);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.75rem;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 30px -15px rgba(0,0,0,0.3);
  margin-bottom: 2rem;
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
  border-color: var(--border-glow);
  box-shadow: 0 10px 40px -15px rgba(99, 102, 241, 0.15);
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: #fff;
}

.card-title i {
  color: var(--accent-indigo);
}

.card-description {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

/* Buttons and Actions */
.primary-report-hero {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.05) 100%);
  border: 1px solid rgba(99, 102, 241, 0.25);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 10px;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-indigo), var(--accent-purple));
  color: #fff;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  border-radius: 6px;
}

.btn-icon {
  padding: 0.5rem;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Secondary Reports Grid */
.reports-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.report-item-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.report-item-card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.15);
}

.report-item-info {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.report-item-info i {
  font-size: 1.5rem;
  color: var(--accent-cyan);
}

.report-item-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.95rem;
  color: #fff;
}

.report-item-subtitle {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* Data Downloads / CSV list */
.csv-list-wrapper {
  margin-top: 1rem;
  max-height: 250px;
  overflow-y: auto;
  padding-right: 0.5rem;
}

.csv-list-wrapper::-webkit-scrollbar {
  width: 6px;
}
.csv-list-wrapper::-webkit-scrollbar-track {
  background: transparent;
}
.csv-list-wrapper::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
}

.csv-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0.85rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  font-size: 0.85rem;
}

.csv-item:last-child {
  border-bottom: none;
}

.csv-name {
  color: var(--color-text-main);
  font-family: monospace;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 75%;
}

.csv-meta {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.csv-download-btn {
  color: var(--accent-emerald);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.csv-download-btn:hover {
  color: #34d399;
}

/* Interactive Cluster Explorer */
.explorer-controls {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
  background: rgba(0, 0, 0, 0.15);
  padding: 1.25rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.control-label {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

/* Select Cluster Size Pills */
.k-selector, .c-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.pill-option {
  position: relative;
}

.pill-option input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.pill-label {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
  min-width: 44px;
}

.pill-label:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
}

.pill-option input:checked + .pill-label {
  background: rgba(99, 102, 241, 0.15);
  border-color: var(--accent-indigo);
  color: #fff;
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.2);
}

/* Visualization Display */
.viz-display-box {
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  min-height: 350px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.viz-display-box img {
  max-width: 100%;
  max-height: 500px;
  object-fit: contain;
  cursor: zoom-in;
  transition: transform var(--transition-normal);
}

.viz-display-box img:hover {
  transform: scale(1.02);
}

.viz-caption {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(15, 23, 42, 0.85);
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  text-align: center;
  position: absolute;
  bottom: 0;
}

/* Interactive Genes Preview Box */
.genes-preview-section {
  margin-top: 1.5rem;
}

.genes-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.genes-box {
  background: #05070c;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
  font-family: monospace;
  font-size: 0.85rem;
  color: var(--accent-cyan);
  max-height: 120px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

/* Chart Gallery Component */
.gallery-selector {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

/* Modal Lightbox */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(5, 7, 12, 0.95);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  opacity: 0;
  transition: opacity var(--transition-normal) ease;
}

.lightbox.active {
  display: flex;
  opacity: 1;
}

.lightbox-content {
  position: relative;
  max-width: 90%;
  max-height: 90%;
}

.lightbox-content img {
  max-width: 100%;
  max-height: 85vh;
  object-fit: contain;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.lightbox-close {
  position: absolute;
  top: -40px;
  right: 0;
  color: #fff;
  font-size: 1.5rem;
  background: transparent;
  border: none;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.lightbox-close:hover {
  color: var(--accent-purple);
}

.lightbox-caption {
  color: var(--color-text-muted);
  text-align: center;
  margin-top: 1rem;
  font-family: var(--font-display);
  font-size: 1rem;
}

/* Floating Backdrop Blur Decor */
.decor-blur-1 {
  position: absolute;
  top: -100px;
  right: -100px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(99, 102, 241, 0.1);
  filter: blur(80px);
  z-index: -1;
  pointer-events: none;
}

.decor-blur-2 {
  position: absolute;
  bottom: -150px;
  left: -150px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(139, 92, 246, 0.08);
  filter: blur(100px);
  z-index: -1;
  pointer-events: none;
}

/* Markdown Reader Modal */
.md-reader-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(11, 15, 25, 0.95);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 1010;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.md-reader-modal.active {
  display: flex;
  opacity: 1;
}

.md-reader-container {
  width: 90%;
  max-width: 900px;
  height: 85vh;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.md-reader-header {
  padding: 1.25rem 2rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(0,0,0,0.15);
}

.md-reader-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: #fff;
}

.md-reader-body {
  flex: 1;
  overflow-y: auto;
  padding: 2.5rem;
  color: var(--color-text-main);
  line-height: 1.7;
}

/* Markdown Content Styling */
.md-content h1, .md-content h2, .md-content h3 {
  font-family: var(--font-display);
  margin-top: 1.5rem;
  margin-bottom: 1rem;
  color: #fff;
}
.md-content h1 { font-size: 1.75rem; border-bottom: 1px solid rgba(255,255,255,0.08); padding-bottom: 0.5rem; }
.md-content h2 { font-size: 1.4rem; }
.md-content h3 { font-size: 1.15rem; color: var(--accent-cyan); }
.md-content p { margin-bottom: 1.25rem; color: #cbd5e1; }
.md-content ul, .md-content ol { margin-bottom: 1.25rem; padding-left: 1.5rem; }
.md-content li { margin-bottom: 0.5rem; }
.md-content code { background: rgba(0,0,0,0.3); padding: 0.2rem 0.4rem; border-radius: 4px; font-family: monospace; font-size: 0.9em; color: var(--accent-purple); }
.md-content blockquote { border-left: 4px solid var(--accent-indigo); padding-left: 1rem; color: var(--color-text-muted); font-style: italic; margin-bottom: 1.25rem; }
.md-content strong { color: #fff; }

.md-reader-close {
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  font-size: 1.25rem;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.md-reader-close:hover {
  color: #fff;
}