:root {
  /* Base colors */
  --primary-color: #3e7bfa;
  --primary-color-dark: #2b68e0;
  --secondary-color: #6c5ce7;
  --accent-color: #00d2d3;
  
  /* Background colors */
  --bg-color: #f5f9ff;
  --card-bg: #ffffff;
  --card-header-bg: #f9fbff;
  
  /* Text colors */
  --text-color: #333;
  --text-muted: #6c757d;
  
  /* Border colors */
  --border-color: #e6eaf0;
  --border-light: #f0f3f9;
  
  /* Status colors */
  --success-color: #23c56f;
  --danger-color: #ff5757;
  
  /* Effects */
  --shadow: 0 8px 15px rgba(0, 0, 0, 0.05);
  --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  --transition-fast: 0.2s;
}

/* Dark theme */
.dark-mode {
  --primary-color: #3e7bfa;
  --primary-color-dark: #2059ca;
  --secondary-color: #6c5ce7;
  --accent-color: #00d2d3;
  
  --bg-color: #0f172a;
  --card-bg: #1e293b;
  --card-header-bg: #293548;
  
  --text-color: #e2e8f0;
  --text-muted: #94a3b8;
  
  --border-color: #334155;
  --border-light: #1e293b;
  
  --shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
  --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

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

body, html {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  background-color: var(--card-bg);
  box-shadow: var(--shadow);
  padding: 15px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.logo {
  display: flex;
  align-items: center;
}

.logo img {
  height: 40px;
  margin-right: 15px;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
  transition: transform 0.3s ease;
}

.logo:hover img {
  transform: rotate(10deg);
}

.logo h1 {
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--primary-color);
  letter-spacing: -0.5px;
  font-family: 'Outfit', sans-serif;
}

.logo span {
  color: var(--secondary-color);
}

nav ul {
  display: flex;
  list-style: none;
}

nav li {
  margin-left: 10px;
}

nav a {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s;
  padding: 8px 12px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

nav a:hover {
  color: var(--primary-color);
  background-color: rgba(62, 123, 250, 0.08);
}

nav a.active {
  color: var(--primary-color);
  background-color: rgba(62, 123, 250, 0.12);
}

nav a i {
  font-size: 1rem;
}

/* Main Content */
main {
  padding: 20px 0;
}

/* Auth Status */
#auth-status-container {
  background-color: rgba(255, 87, 87, 0.1);
  border-radius: 8px;
  padding: 12px 16px;
  margin-bottom: 20px;
}

.auth-error {
  color: var(--danger-color);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Hero Section */
.hero-section {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 40px;
  margin-bottom: 30px;
  background-color: var(--card-bg);
  border-radius: 12px;
  box-shadow: var(--card-shadow);
  position: relative;
  overflow: hidden;
}

.hero-content {
  flex: 1;
  position: relative;
  z-index: 2;
}

.hero-title {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 15px;
  line-height: 1.2;
  color: var(--primary-color);
  font-family: 'Outfit', sans-serif;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  max-width: 80%;
}

.hero-cta {
  background-color: var(--primary-color);
  color: white;
  border: none;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.hero-cta:hover {
  background-color: var(--primary-color-dark);
  transform: translateY(-2px);
}

.hero-image {
  flex: 0 0 40%;
  max-width: 350px;
  height: auto;
  position: relative;
  z-index: 1;
}

/* Dashboard Layout */
.dashboard {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 20px;
  margin-top: 20px;
}

/* Cards */
.card {
  background-color: var(--card-bg);
  border-radius: 12px;
  box-shadow: var(--card-shadow);
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  background-color: var(--card-header-bg);
  border-bottom: 1px solid var(--border-color);
}

.card-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

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

.card-actions {
  display: flex;
  gap: 10px;
}

.btn-icon {
  background: none;
  border: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-muted);
  transition: all 0.2s;
}

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

/* Price Info */
.price-info {
  text-align: center;
  padding: 20px;
}

.current-price {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 8px;
}

.price-change {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-weight: 500;
}

.price-up {
  background-color: rgba(35, 197, 111, 0.1);
  color: var(--success-color);
}

.price-down {
  background-color: rgba(255, 87, 87, 0.1);
  color: var(--danger-color);
}

/* Chart Container */
.chart-container {
  height: 250px;
  padding: 10px;
  margin: 0 20px 20px;
  background-color: var(--card-bg);
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.chart-controls {
  display: flex;
  justify-content: center;
  gap: 5px;
  padding: 0 20px 20px;
}

.chart-period {
  padding: 6px 12px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  background: none;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s;
}

.chart-period:hover {
  background-color: rgba(0, 0, 0, 0.03);
  border-color: var(--primary-color);
}

.chart-period.active {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

/* Forms & Inputs */
.form-group {
  margin-bottom: 15px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
}

.form-control {
  width: 100%;
  padding: 10px 15px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 0.95rem;
  background-color: var(--card-bg);
  color: var(--text-color);
  transition: border-color 0.2s;
}

.form-control:focus {
  border-color: var(--primary-color);
  outline: none;
  box-shadow: 0 0 0 2px rgba(62, 123, 250, 0.2);
}

.input-with-icon {
  position: relative;
}

.input-with-icon input {
  padding-left: 40px;
}

.input-with-icon i {
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 8px;
  border: none;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 0.95rem;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background-color: var(--primary-color-dark);
}

.btn-danger {
  background-color: var(--danger-color);
  color: white;
}

.btn-danger:hover {
  background-color: #e04343;
}

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

.btn-secondary:hover {
  background-color: rgba(0, 0, 0, 0.03);
}

.btn-block {
  display: block;
  width: 100%;
}

.btn-sm {
  padding: 6px 10px;
  font-size: 0.8rem;
}

/* Tabs */
.tab-container {
  margin: 20px;
}

.tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
}

.tab {
  padding: 10px 15px;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 8px;
}

.tab.active {
  color: var(--primary-color);
  border-bottom-color: var(--primary-color);
}

.tab:hover:not(.active) {
  color: var(--primary-color);
}

.tab-content {
  padding: 15px 0;
}

.tab-pane {
  display: none;
}

.tab-pane.active {
  display: block;
  animation: fadeIn 0.3s ease-in;
}

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

/* Order Book */
.order-book {
  margin: 0 20px 20px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.order-header {
  display: flex;
  justify-content: space-between;
  padding: 12px 15px;
  background-color: var(--card-header-bg);
  font-weight: 600;
  border-bottom: 1px solid var(--border-color);
}

.orders-container {
  max-height: 150px;
  overflow-y: auto;
}

.order-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 15px;
  border-bottom: 1px solid var(--border-light);
  position: relative;
}

.order-row:hover {
  background-color: rgba(0, 0, 0, 0.02);
}

.ask {
  color: var(--danger-color);
}

.bid {
  color: var(--success-color);
}

.depth-bar {
  position: absolute;
  height: 100%;
  right: 0;
  z-index: 0;
  opacity: 0.3;
}

.ask .depth-bar {
  background-color: var(--danger-color);
}

.bid .depth-bar {
  background-color: var(--success-color);
}

/* Balance Section */
.balance-header {
  display: flex;
  justify-content: space-between;
  padding: 12px 20px;
  background-color: var(--card-header-bg);
  font-weight: 600;
  margin: 0 20px;
  border-radius: 8px 8px 0 0;
  border: 1px solid var(--border-color);
}

#account-balances {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100px;
  margin: 20px;
  color: var(--text-muted);
}

/* Market Overview */
.market-overview {
  grid-column: span 12;
}

.filter-controls {
  display: flex;
  gap: 10px;
}

.market-list {
  width: 100%;
  border-collapse: collapse;
  margin: 0 auto 20px;
}

.market-list th,
.market-list td {
  padding: 12px 20px;
  text-align: left;
}

.market-list th {
  background-color: var(--card-header-bg);
  font-weight: 600;
}

.market-list th i {
  font-size: 0.8rem;
  opacity: 0.7;
  margin-left: 5px;
}

.market-list tbody tr {
  transition: background-color 0.2s;
  border-bottom: 1px solid var(--border-light);
}

.market-list tbody tr:hover {
  background-color: rgba(0, 0, 0, 0.02);
}

/* API Settings */
.api-settings {
  padding-bottom: 20px;
}

#api-form {
  padding: 20px;
}

.security-notice {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
}

/* News Section */
.news-section {
  grid-column: span 12;
}

.news-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  padding: 20px;
}

.news-item {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 20px;
  transition: transform 0.3s, box-shadow 0.3s;
}

.news-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--card-shadow);
}

.news-date {
  display: inline-block;
  color: var(--text-muted);
  margin-bottom: 8px;
  font-size: 0.9rem;
}

.news-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.news-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 15px;
}

.read-more {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  display: inline-block;
}

.read-more:hover {
  text-decoration: underline;
}

/* Footer */
footer {
  background-color: var(--card-bg);
  padding: 40px 0 20px;
  margin-top: 40px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 30px;
  margin-bottom: 30px;
}

.footer-logo {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.footer-logo img {
  height: 40px;
  margin-bottom: 15px;
}

.footer-logo h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
  color: var(--primary-color);
}

.footer-logo p {
  color: var(--text-muted);
}

.footer-links h4 {
  font-size: 1.1rem;
  margin-bottom: 15px;
}

.footer-links ul {
  list-style: none;
}

.footer-links li {
  margin-bottom: 8px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--primary-color);
}

.footer-newsletter h4 {
  font-size: 1.1rem;
  margin-bottom: 15px;
}

.newsletter-form {
  display: flex;
  margin-top: 15px;
}

.newsletter-form input {
  flex: 1;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: 8px 0 0 8px;
  background-color: var(--card-bg);
  color: var(--text-color);
}

.newsletter-form .btn {
  border-radius: 0 8px 8px 0;
  background-color: var(--primary-color);
  color: white;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

.social-links {
  display: flex;
  gap: 15px;
}

.social-links a {
  color: var(--text-muted);
  font-size: 1.2rem;
  transition: color 0.2s;
}

.social-links a:hover {
  color: var(--primary-color);
}

/* Grid Layout */
.col-span-1 { grid-column: span 1; }
.col-span-2 { grid-column: span 2; }
.col-span-3 { grid-column: span 3; }
.col-span-4 { grid-column: span 4; }
.col-span-5 { grid-column: span 5; }
.col-span-6 { grid-column: span 6; }
.col-span-7 { grid-column: span 7; }
.col-span-8 { grid-column: span 8; }
.col-span-9 { grid-column: span 9; }
.col-span-10 { grid-column: span 10; }
.col-span-11 { grid-column: span 11; }
.col-span-12 { grid-column: span 12; }

/* Responsive */
@media (max-width: 992px) {
  .dashboard {
    grid-template-columns: repeat(6, 1fr);
  }
  
  .col-span-4,
  .col-span-8 {
    grid-column: span 6;
  }
  
  .hero-section {
    flex-direction: column;
    text-align: center;
  }
  
  .hero-content {
    order: 2;
  }
  
  .hero-subtitle {
    max-width: 100%;
  }
  
  .hero-image {
    order: 1;
    margin-bottom: 20px;
  }
}

@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    gap: 15px;
  }
  
  nav ul {
    flex-wrap: wrap;
    justify-content: center;
    gap: 5px;
  }
  
  .dashboard {
    grid-template-columns: 1fr;
  }
  
  .col-span-4, 
  .col-span-8, 
  .col-span-12 {
    grid-column: span 1;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 15px;
    text-align: center;
  }
}