/* ===========================
   BTC TRADING DASHBOARD
   Dark Mode Crypto-Style
   Ultra High-Tech Design
   =========================== */

:root {
  /* Crypto Gradient Colors */
  --crypto-purple: #8B5CF6;
  --crypto-blue: #3B82F6;
  --crypto-cyan: #06B6D4;
  --crypto-green: #10B981;
  --crypto-orange: #F59E0B;
  --crypto-red: #EF4444;
  
  /* Dark Background */
  --bg-primary: #0A0E27;
  --bg-secondary: #0F1629;
  --bg-tertiary: #1A1F3A;
  --bg-card: #141B2D;
  --bg-hover: #1E2540;
  
  /* Text Colors */
  --text-primary: #FFFFFF;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  
  /* Border & Shadow */
  --border-color: rgba(139, 92, 246, 0.2);
  --shadow-glow: 0 0 20px rgba(139, 92, 246, 0.3);
  --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.5);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Animated Background Gradient */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 30%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(6, 182, 212, 0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
  animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.8; }
}

/* ===========================
   NAVIGATION & SIDEBAR
   =========================== */

.nav-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 280px;
  height: 100vh;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  padding: 2rem 1.5rem;
  z-index: 1000;
  overflow-y: auto;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--crypto-purple), var(--crypto-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-logo i {
  -webkit-text-fill-color: var(--crypto-purple);
}

.nav-menu {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 12px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.nav-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--crypto-purple), var(--crypto-blue));
  opacity: 0.1;
  transition: width 0.3s ease;
}

.nav-link:hover::before,
.nav-link.active::before {
  width: 100%;
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

.nav-link.active {
  color: var(--text-primary);
  background: linear-gradient(90deg, rgba(139, 92, 246, 0.2), rgba(59, 130, 246, 0.1));
  border-left: 3px solid var(--crypto-purple);
}

.nav-link i {
  font-size: 1.25rem;
  width: 24px;
  text-align: center;
}

/* ===========================
   MAIN CONTENT AREA
   =========================== */

.main-container {
  margin-left: 280px;
  padding: 2rem;
  min-height: 100vh;
}

.page-header {
  margin-bottom: 2rem;
}

.page-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, var(--crypto-purple), var(--crypto-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
}

/* ===========================
   CARDS & CONTAINERS
   =========================== */

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.5rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--crypto-purple), var(--crypto-cyan));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
  border-color: var(--crypto-purple);
}

.card:hover::before {
  opacity: 1;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.card-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.card-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.icon-purple {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(139, 92, 246, 0.1));
  color: var(--crypto-purple);
}

.icon-blue {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(59, 130, 246, 0.1));
  color: var(--crypto-blue);
}

.icon-green {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(16, 185, 129, 0.1));
  color: var(--crypto-green);
}

.icon-orange {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(245, 158, 11, 0.1));
  color: var(--crypto-orange);
}

.icon-red {
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.2), rgba(239, 68, 68, 0.1));
  color: var(--crypto-red);
}

.card-value {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.card-change {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
}

.change-positive {
  color: var(--crypto-green);
  background: rgba(16, 185, 129, 0.1);
}

.change-negative {
  color: var(--crypto-red);
  background: rgba(239, 68, 68, 0.1);
}

/* ===========================
   BUTTONS
   =========================== */

.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--crypto-purple), var(--crypto-blue));
  color: white;
}

.btn-primary:hover {
  box-shadow: 0 8px 24px rgba(139, 92, 246, 0.4);
  transform: translateY(-2px);
}

.btn-success {
  background: linear-gradient(135deg, var(--crypto-green), var(--crypto-cyan));
  color: white;
}

.btn-danger {
  background: linear-gradient(135deg, var(--crypto-red), var(--crypto-orange));
  color: white;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

.btn-outline:hover {
  background: var(--bg-hover);
  border-color: var(--crypto-purple);
}

/* ===========================
   TABLES
   =========================== */

.table-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table thead {
  background: var(--bg-tertiary);
}

.table th {
  padding: 1rem;
  text-align: left;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.table td {
  padding: 1rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-primary);
}

.table tr {
  transition: background 0.2s ease;
}

.table tbody tr:hover {
  background: var(--bg-hover);
}

/* ===========================
   BADGES & LABELS
   =========================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.375rem 0.75rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-buy {
  background: rgba(16, 185, 129, 0.2);
  color: var(--crypto-green);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-sell {
  background: rgba(239, 68, 68, 0.2);
  color: var(--crypto-red);
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.badge-hold {
  background: rgba(245, 158, 11, 0.2);
  color: var(--crypto-orange);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-active {
  background: rgba(6, 182, 212, 0.2);
  color: var(--crypto-cyan);
  border: 1px solid rgba(6, 182, 212, 0.3);
}

/* ===========================
   CHARTS & VISUALIZATIONS
   =========================== */

.chart-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.5rem;
  margin-bottom: 2rem;
  height: 400px;
}

.chart-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.chart-title {
  font-size: 1.25rem;
  font-weight: 700;
}

/* ===========================
   FILTERS & SEARCH
   =========================== */

.filters-bar {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.search-box {
  flex: 1;
  min-width: 250px;
  position: relative;
}

.search-box input {
  width: 100%;
  padding: 0.875rem 1rem 0.875rem 3rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 0.875rem;
  transition: all 0.3s ease;
}

.search-box input:focus {
  outline: none;
  border-color: var(--crypto-purple);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}

.search-box i {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
}

.filter-select {
  padding: 0.875rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.3s ease;
}

.filter-select:focus {
  outline: none;
  border-color: var(--crypto-purple);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}

/* ===========================
   STATS GRID
   =========================== */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.25rem;
  text-align: center;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.5rem;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* ===========================
   SYSTEM STATUS
   =========================== */

.system-status {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.status-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.status-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.status-ok {
  background: var(--crypto-green);
  box-shadow: 0 0 10px var(--crypto-green);
}

.status-warning {
  background: var(--crypto-orange);
  box-shadow: 0 0 10px var(--crypto-orange);
}

.status-error {
  background: var(--crypto-red);
  box-shadow: 0 0 10px var(--crypto-red);
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.status-info h4 {
  font-size: 0.875rem;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.status-info p {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* ===========================
   LOADING STATES
   =========================== */

.loading-spinner {
  display: inline-block;
  width: 40px;
  height: 40px;
  border: 4px solid rgba(139, 92, 246, 0.2);
  border-top-color: var(--crypto-purple);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ===========================
   RESPONSIVE DESIGN
   =========================== */

@media (max-width: 1024px) {
  .nav-container {
    width: 240px;
  }
  
  .main-container {
    margin-left: 240px;
  }
}

@media (max-width: 768px) {
  .nav-container {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }
  
  .nav-container.mobile-open {
    transform: translateX(0);
  }
  
  .main-container {
    margin-left: 0;
    padding: 1rem;
  }
  
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
  
  .filters-bar {
    flex-direction: column;
  }
  
  .page-title {
    font-size: 1.5rem;
  }
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 1001;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 0.75rem;
  color: var(--text-primary);
  cursor: pointer;
}

@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: block;
  }
}

/* ===========================
   UTILITY CLASSES
   =========================== */

.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.hidden { display: none; }