/* ==========================================================================
   Skillzshare Premium Stylesheet
   Design Language: Glassmorphism, Deep HSL Gradients, Smooth Micro-interactions
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
  /* Dark Mode Palette (Default - Stacks Premium Theme) */
  --bg-primary: #04060f;
  --bg-secondary: rgba(11, 15, 36, 0.75);
  --bg-tertiary: rgba(20, 26, 61, 0.5);
  
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  
  --accent-karma: #ff8a00;       /* Cyber Orange-Gold (Coins) */
  --accent-karma-glow: rgba(255, 138, 0, 0.2);
  --accent-trade: #925df7;       /* Neon Violet (Swaps/Trades) */
  --accent-trade-glow: rgba(146, 93, 247, 0.25);
  --accent-gold: #fbbf24;        /* Rich Amber (Ratings) */
  --accent-rose: #f43f5e;        /* Rose (Debits) */

  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(146, 93, 247, 0.5);
  
  --glass-bg: rgba(8, 12, 30, 0.7);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-shadow: rgba(0, 0, 0, 0.5);
  --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
  
  --font-display: 'Outfit', sans-serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
  /* Light Mode Palette (Premium Warm Theme) */
  --bg-primary: #f4f6fa;
  --bg-secondary: rgba(255, 255, 255, 0.88);
  --bg-tertiary: rgba(235, 239, 248, 0.95);
  
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #94a3b8;
  
  --accent-karma: #d47a00;       /* Rich Warm Amber-Gold */
  --accent-karma-glow: rgba(212, 122, 0, 0.15);
  --accent-trade: #7234e6;       /* Vibrant Trust Purple */
  --accent-trade-glow: rgba(114, 52, 230, 0.15);
  --accent-gold: #b45309;
  --accent-rose: #e11d48;

  --border-color: rgba(0, 0, 0, 0.08);
  --border-focus: rgba(114, 52, 230, 0.5);
  
  --glass-bg: rgba(255, 255, 255, 0.8);
  --glass-border: rgba(0, 0, 0, 0.05);
  --glass-shadow: rgba(15, 23, 42, 0.06);
  --card-shadow: 0 10px 30px rgba(15, 23, 42, 0.03);
}

/* ==========================================================================
   Reset & Global Configurations
   ========================================================================== */

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.5;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
}

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

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

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: var(--radius-sm);
  border: 2px solid var(--bg-primary);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ==========================================================================
   Visual Utilities & Dynamic Effects
   ========================================================================== */

.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow), var(--card-shadow);
  border-radius: var(--radius-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border var(--transition-normal);
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent-karma), var(--accent-trade));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-btn {
  background: linear-gradient(135deg, var(--accent-trade), #4f46e5);
  color: #ffffff !important;
  border: none;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 15px var(--accent-trade-glow);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.gradient-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}
.gradient-btn:active {
  transform: translateY(0);
}

.karma-btn {
  background: linear-gradient(135deg, var(--accent-karma), #059669);
  color: #ffffff !important;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 15px var(--accent-karma-glow);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.karma-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
}

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

.header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 100;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 4%;
  border-bottom: 1px solid var(--border-color);
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: background-color var(--transition-normal);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}
.brand-logo {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--accent-karma), var(--accent-trade));
  border-radius: 12px;
  color: white;
  box-shadow: 0 4px 15px var(--accent-karma-glow);
}
.brand-name {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-btn {
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  color: var(--text-secondary);
  transition: color var(--transition-fast), background var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-btn:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}
.nav-btn.active {
  color: var(--text-primary);
  background: var(--bg-tertiary);
  font-weight: 600;
  border-bottom: 2px solid var(--accent-trade);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Dynamic Wallet Indicator */
.wallet-indicator {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: 50px;
  color: var(--accent-karma);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.wallet-indicator:hover {
  background: rgba(16, 185, 129, 0.18);
  transform: scale(1.03);
  box-shadow: 0 0 15px var(--accent-karma-glow);
}
.wallet-indicator svg {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.15); }
  100% { transform: scale(1); }
}

/* User Pill & Avatar */
.user-pill {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px 6px 6px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  cursor: pointer;
  transition: border var(--transition-fast), background var(--transition-fast);
}
.user-pill:hover {
  border-color: var(--border-focus);
  background: var(--bg-secondary);
}
.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--accent-trade);
}
.user-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* Firebase Connection Indicator Status */
.firebase-status {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  padding: 8px 14px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  transition: all var(--transition-fast);
}
.firebase-status.live {
  border-color: rgba(46, 204, 113, 0.4);
  background: rgba(46, 204, 113, 0.05);
}
.firebase-status.live .status-dot {
  background: #2ecc71;
  box-shadow: 0 0 8px #2ecc71;
  animation: pulse-green 2s infinite;
}
.firebase-status.live .status-text {
  color: #2ecc71;
}
.firebase-status .status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #7f8c8d;
  display: inline-block;
}
.firebase-status .status-text {
  color: var(--text-muted);
}
@keyframes pulse-green {
  0% {
    box-shadow: 0 0 0 0 rgba(46, 204, 113, 0.7);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(46, 204, 113, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(46, 204, 113, 0);
  }
}

/* Dark Mode Switch Toggle */
.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}
.theme-toggle:hover {
  background: var(--bg-secondary);
  border-color: var(--border-focus);
  transform: rotate(15deg);
}

/* ==========================================================================
   Hero Section / Dashboard Layout
   ========================================================================== */

.app-container {
  max-width: 1300px;
  margin: 0 auto;
  padding: 40px 20px 100px;
}

.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 60px;
  padding: 40px 0;
}
.hero-content h1 {
  font-size: 3.5rem;
  line-height: 1.15;
  margin-bottom: 20px;
}
.hero-content p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 520px;
}
.hero-buttons {
  display: flex;
  gap: 16px;
}
.btn-large {
  padding: 16px 32px;
  border-radius: var(--radius-md);
  font-size: 1.05rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
}
.btn-outline {
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  background: var(--bg-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.btn-outline:hover {
  background: var(--bg-tertiary);
  border-color: var(--text-muted);
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}
.visual-card {
  width: 85%;
  aspect-ratio: 1.2;
  padding: 24px;
  position: relative;
  overflow: hidden;
}
.visual-badge {
  position: absolute;
  top: 24px;
  right: 24px;
  background: var(--accent-karma);
  color: white;
  padding: 6px 14px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.85rem;
}
.visual-points {
  font-size: 3rem;
  font-weight: 800;
  color: var(--accent-karma);
  margin-top: 10px;
  display: flex;
  align-items: baseline;
  gap: 5px;
}
.visual-points span {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 500;
}
.visual-graphic {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.graphic-bar {
  height: 8px;
  background: var(--border-color);
  border-radius: 4px;
  position: relative;
  overflow: hidden;
}
.graphic-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-trade), var(--accent-karma));
  border-radius: 4px;
  width: 75%;
  animation: fillBar 2.5s ease-out forwards;
}

@keyframes fillBar {
  from { width: 0%; }
  to { width: 75%; }
}

.floating-avatar {
  position: absolute;
  width: 55px;
  height: 55px;
  border-radius: 50%;
  border: 3px solid var(--accent-trade);
  box-shadow: var(--card-shadow);
  animation: float 4s ease-in-out infinite;
}
.float-1 {
  bottom: -15px;
  left: 20px;
  border-color: var(--accent-karma);
  animation-delay: 0.5s;
}
.float-2 {
  top: -15px;
  right: 40px;
  border-color: var(--accent-gold);
  animation-delay: 1.2s;
}

@keyframes float {
  0% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-10px) rotate(5deg); }
  100% { transform: translateY(0px) rotate(0deg); }
}

/* ==========================================================================
   Features Stat Highlights
   ========================================================================== */

.feature-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 60px;
}
.stat-card {
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 20px;
}
.stat-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  color: var(--accent-trade);
}
.stat-card:nth-child(2) .stat-icon {
  color: var(--accent-karma);
}
.stat-card:nth-child(3) .stat-icon {
  color: var(--accent-gold);
}
.stat-info h3 {
  font-size: 1.6rem;
  line-height: 1.2;
}
.stat-info p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* ==========================================================================
   Marketplace Grid & Listings
   ========================================================================== */

.marketplace-section {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.filters-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  padding: 16px 24px;
}

.search-wrapper {
  position: relative;
  flex: 1;
  min-width: 280px;
  max-width: 500px;
}
.search-input {
  width: 100%;
  padding: 12px 16px 12px 48px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}
.search-input:focus {
  border-color: var(--accent-trade);
  background: var(--bg-secondary);
  box-shadow: 0 0 0 3px var(--accent-trade-glow);
}
.search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.filters-group {
  display: flex;
  align-items: center;
  gap: 12px;
}
.filter-btn {
  padding: 8px 16px;
  border-radius: 50px;
  font-size: 0.88rem;
  font-weight: 600;
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--text-secondary);
}
.filter-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}
.filter-btn.active {
  background: var(--text-primary);
  color: var(--bg-primary);
  border-color: var(--text-primary);
}

.sort-select {
  padding: 10px 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-weight: 500;
  transition: border var(--transition-fast);
}
.sort-select:hover {
  border-color: var(--text-muted);
}

/* Listings Grid Layout */
.listings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 28px;
}

.card {
  overflow: hidden;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  position: relative;
}
.card:hover {
  transform: translateY(-6px);
  border-color: var(--border-focus);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.card-banner {
  position: relative;
  width: 100%;
  height: 180px;
  overflow: hidden;
  background: var(--bg-tertiary);
}
.card-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}
.card:hover .card-image {
  transform: scale(1.08);
}
.card-category-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 4px 10px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: rgba(0,0,0,0.6);
  color: white;
  backdrop-filter: blur(4px);
}
.card-points-badge {
  position: absolute;
  bottom: 14px;
  right: 14px;
  padding: 6px 12px;
  background: var(--accent-karma);
  color: white;
  font-weight: 800;
  font-size: 0.9rem;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.4);
}

.card-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex-grow: 1;
}

.author-meta {
  display: flex;
  align-items: center;
  gap: 8px;
}
.author-img {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  object-fit: cover;
}
.author-name {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 600;
}
.author-rating {
  display: flex;
  align-items: center;
  gap: 3px;
  margin-left: auto;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-gold);
}

.card-title {
  font-size: 1.18rem;
  line-height: 1.3;
  color: var(--text-primary);
}
.card-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-footer {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.listing-type {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-trade);
  background: var(--accent-trade-glow);
  padding: 3px 8px;
  border-radius: 4px;
}

/* ==========================================================================
   Details Modal & Barter Selection Panels
   ========================================================================== */

.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(4, 6, 12, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn 0.25s ease-out forwards;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-content {
  width: 100%;
  max-width: 850px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  animation: scaleIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes scaleIn {
  from { transform: scale(0.9) translateY(20px); opacity: 0; }
  to { transform: scale(1) translateY(0); opacity: 1; }
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}
.modal-close:hover {
  background: rgba(255,255,255,0.15);
  transform: scale(1.05);
}

.details-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 30px;
  padding: 30px;
}

.details-visuals {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.details-image {
  width: 100%;
  aspect-ratio: 1.4;
  border-radius: var(--radius-md);
  object-fit: cover;
}
.details-author-card {
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.details-author-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid var(--accent-trade);
}
.author-details h4 {
  font-size: 1rem;
}
.author-details p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.details-info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.details-header {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.details-tag-row {
  display: flex;
  gap: 10px;
  align-items: center;
}
.details-title {
  font-size: 1.8rem;
  line-height: 1.25;
}
.details-price {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--accent-karma);
  display: flex;
  align-items: center;
  gap: 8px;
}
.details-price span {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.details-desc-box h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}
.details-desc-box p {
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

/* Exchange Action Hub */
.action-box {
  padding: 20px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  margin-top: auto;
}
.action-box-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 16px;
}
.action-tab-btn {
  flex: 1;
  padding: 10px 0;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  cursor: pointer;
  text-align: center;
  transition: all var(--transition-fast);
}
.action-tab-btn.active {
  color: var(--text-primary);
  border-color: var(--accent-trade);
}
.action-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.barter-dropdown {
  width: 100%;
  padding: 12px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  cursor: pointer;
}
.barter-dropdown:focus {
  border-color: var(--accent-trade);
}

/* ==========================================================================
   Simulated Google Auth Modal
   ========================================================================== */

.google-auth-card {
  width: 100%;
  max-width: 440px;
  padding: 35px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  text-align: center;
}

.google-logo {
  display: flex;
  gap: 3px;
  font-family: 'Product Sans', Arial, sans-serif;
  font-weight: 600;
  font-size: 2.2rem;
  letter-spacing: -0.05em;
  margin-bottom: 10px;
}
.g-blue { color: #4285F4; }
.g-red { color: #EA4335; }
.g-yellow { color: #FBBC05; }
.g-green { color: #34A853; }

.google-accounts-list {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 10px;
}
.google-account-item {
  width: 100%;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  text-align: left;
  transition: all var(--transition-fast);
}
.google-account-item:hover {
  background: rgba(255,255,255,0.07);
  border-color: var(--border-focus);
  transform: translateX(3px);
}
.google-account-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  object-fit: cover;
}
.google-account-details h5 {
  font-size: 0.95rem;
  font-weight: 600;
}
.google-account-details p {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.google-custom-auth {
  width: 100%;
  border-top: 1px dashed var(--border-color);
  padding-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.input-row {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: left;
}
.input-row label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
}
.custom-input {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  transition: border var(--transition-fast);
}
.custom-input:focus {
  border-color: var(--accent-trade);
}

/* ==========================================================================
   Create Listing Modal & Form
   ========================================================================== */

.create-form-modal {
  max-width: 600px;
}
.create-form {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.create-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* ==========================================================================
   Wallet & Activity Ledger
   ========================================================================== */

.wallet-view {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 30px;
}

.wallet-overview-card {
  padding: 30px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.wallet-card-brand {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.wallet-logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--accent-karma);
  display: flex;
  align-items: center;
  gap: 6px;
}
.wallet-balance-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.wallet-balance-lbl {
  font-size: 0.85rem;
  text-transform: uppercase;
  color: var(--text-secondary);
  font-weight: 600;
}
.wallet-balance-val {
  font-size: 3.2rem;
  font-weight: 800;
  color: var(--accent-karma);
  line-height: 1;
}
.wallet-stats-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
}
.wallet-mini-stat h5 {
  font-size: 0.8rem;
  color: var(--text-secondary);
}
.wallet-mini-stat p {
  font-size: 1.25rem;
  font-weight: 700;
}

.ledger-wrapper {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.ledger-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.ledger-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 400px;
  overflow-y: auto;
}
.ledger-item {
  padding: 14px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: border var(--transition-fast);
}
.ledger-item:hover {
  border-color: var(--text-muted);
}
.ledger-item-left {
  display: flex;
  align-items: center;
  gap: 12px;
}
.ledger-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.ledger-icon.incoming {
  background: rgba(16, 185, 129, 0.1);
  color: var(--accent-karma);
}
.ledger-icon.outgoing {
  background: rgba(244, 63, 94, 0.1);
  color: var(--accent-rose);
}
.ledger-meta h5 {
  font-size: 0.9rem;
}
.ledger-meta p {
  font-size: 0.75rem;
  color: var(--text-muted);
}
.ledger-amount {
  font-weight: 800;
  font-size: 1rem;
}
.ledger-amount.incoming {
  color: var(--accent-karma);
}
.ledger-amount.outgoing {
  color: var(--accent-rose);
}

/* ==========================================================================
   Trade Hub Dashboard
   ========================================================================== */

.trade-hub-wrapper {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.trade-tabs {
  display: flex;
  gap: 10px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 10px;
}
.trade-tab-btn {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 8px;
}
.trade-tab-btn:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}
.trade-tab-btn.active {
  color: var(--accent-trade);
  background: var(--accent-trade-glow);
}

.trade-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.trade-card {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
  border-left: 4px solid var(--accent-trade);
}
.trade-card.completed {
  border-left-color: var(--accent-karma);
}
.trade-card.cancelled {
  border-left-color: var(--text-muted);
}
.trade-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.trade-status-badge {
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  background: var(--bg-tertiary);
  color: var(--text-secondary);
}
.status-pending {
  background: rgba(245, 158, 11, 0.1);
  color: var(--accent-gold);
}
.status-accepted {
  background: rgba(99, 102, 241, 0.1);
  color: var(--accent-trade);
}
.status-completed {
  background: rgba(16, 185, 129, 0.1);
  color: var(--accent-karma);
}
.status-cancelled {
  background: rgba(244, 63, 94, 0.1);
  color: var(--accent-rose);
}

.trade-exchange-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.exchange-node {
  flex: 1;
  min-width: 200px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.exchange-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
}
.exchange-info h5 {
  font-size: 0.9rem;
}
.exchange-info p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.exchange-arrow {
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
}
.exchange-arrow.points {
  color: var(--accent-karma);
}

.trade-card-footer {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  border-top: 1px solid var(--border-color);
  padding-top: 14px;
}

/* ==========================================================================
   User Profile Screen
   ========================================================================== */

.profile-wrapper {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: 30px;
}

.profile-side-card {
  padding: 30px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 20px;
}
.profile-large-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: 4px solid var(--accent-trade);
  object-fit: cover;
  box-shadow: var(--card-shadow);
}
.profile-user-info h2 {
  font-size: 1.6rem;
}
.profile-user-info p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

.profile-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  width: 100%;
  gap: 16px;
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
}
.profile-mini-stat h4 {
  font-size: 1.2rem;
}
.profile-mini-stat p {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.profile-details-main {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.profile-bio-box h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
}
.profile-bio-box p {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.tags-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}
.tag-item {
  padding: 6px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
}

.level-badge-container {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: var(--radius-md);
  margin-top: 16px;
}
.level-badge-container svg {
  color: var(--accent-gold);
}
.level-info h5 {
  font-size: 0.95rem;
  color: var(--accent-gold);
}
.level-info p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   Toasts & Real-time Alerts
   ========================================================================== */

.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 2000;
}

.toast {
  padding: 16px 24px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 300px;
  max-width: 420px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
  animation: slideInToast 0.35s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes slideInToast {
  from { transform: translateX(100%) translateY(20px); opacity: 0; }
  to { transform: translateX(0) translateY(0); opacity: 1; }
}

.toast.success {
  background: rgba(16, 185, 129, 0.95);
  color: white;
  border-left: 5px solid #059669;
}
.toast.info {
  background: rgba(99, 102, 241, 0.95);
  color: white;
  border-left: 5px solid #4f46e5;
}
.toast.error {
  background: rgba(244, 63, 94, 0.95);
  color: white;
  border-left: 5px solid #e11d48;
}

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

@media (max-width: 992px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-content p {
    margin: 0 auto 32px;
  }
  .hero-buttons {
    justify-content: center;
  }
  .visual-card {
    width: 100%;
  }
  .wallet-view, .profile-wrapper {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .header {
    height: auto;
    padding: 18px 4%;
    flex-direction: column;
    gap: 16px;
    align-items: center;
  }
  .nav-links {
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
    white-space: nowrap;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 6px;
    gap: 6px;
  }
  .nav-links::-webkit-scrollbar {
    display: none;
  }
  .nav-btn {
    flex-shrink: 0;
    padding: 8px 14px;
    font-size: 0.9rem;
  }
  .nav-right {
    width: 100%;
    justify-content: space-between;
    gap: 12px;
  }
  .firebase-status {
    padding: 6px 12px;
    font-size: 0.75rem;
    gap: 6px;
  }
  
  /* Swipeable Horizontal Category Filters */
  .filters-bar {
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
    padding: 16px;
  }
  .search-wrapper {
    width: 100%;
    max-width: 100%;
    min-width: 0;
  }
  .filters-group {
    width: 100%;
    overflow-x: auto;
    white-space: nowrap;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 6px;
    gap: 8px;
    justify-content: flex-start;
  }
  .filters-group::-webkit-scrollbar {
    display: none;
  }
  .filter-btn {
    flex-shrink: 0;
    padding: 6px 12px;
    font-size: 0.8rem;
  }

  /* Modals Layout & Spacers */
  .modal-content {
    max-height: 95vh;
  }
  .details-grid {
    grid-template-columns: 1fr;
    padding: 16px;
    gap: 20px;
  }
  .details-visuals {
    gap: 12px;
  }
  .details-image {
    aspect-ratio: 1.5;
  }
  .details-title {
    font-size: 1.4rem;
  }
  .details-price {
    font-size: 1.8rem;
  }
  .modal-close {
    top: 10px;
    right: 10px;
    width: 32px;
    height: 32px;
  }
  
  .create-grid-2 {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .modal-content.create-listing-modal {
    padding: 20px;
  }
  
  /* Ledger meta wrap */
  .ledger-meta p {
    word-break: break-word;
  }
}

@media (max-width: 480px) {
  .listings-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .card-banner {
    height: 180px;
  }
  .app-container {
    padding: 20px 12px 80px;
  }
  
  /* Full width button stacks */
  .trade-card-footer {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }
  .trade-card-footer button {
    width: 100%;
    justify-content: center;
  }
  
  .hero-content h1 {
    font-size: 2.2rem;
  }
}