/**
 * Estilos Principales - Oráculo Binance Venezuela
 * Tema oscuro con acentos verdes/rojos para precios
 * 
 * @package OraculoBinanceVE
 * @version 2.0.0
 */

:root {
    --bg-primary: #0f1419;
    --bg-secondary: #16181d;
    --bg-card: #1a1d23;
    --bg-hover: #21252b;
    
    --text-primary: #e8e9ea;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --accent-primary: #3b82f6;
    --accent-success: #10b981;
    --accent-danger: #ef4444;
    --accent-warning: #f59e0b;
    
    --border-color: #2d3139;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'Courier New', monospace;
}

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

body {
    font-family: var(--font-primary);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo i {
    font-size: 2rem;
    color: var(--accent-primary);
}

.logo h1 {
    font-size: 1.75rem;
    font-weight: 700;
}

.version {
    background: var(--bg-card);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.system-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-weight: 600;
}

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

.status-healthy { 
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-success);
}

.status-degraded {
    background: rgba(245, 158, 11, 0.1);
    color: var(--accent-warning);
}

.status-unhealthy {
    background: rgba(239, 68, 68, 0.1);
    color: var(--accent-danger);
}

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

/* Rate Banner */
.rate-banner {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    padding: 3rem 0;
    text-align: center;
}

.rate-display {
    display: inline-block;
}

.rate-label {
    font-size: 1.25rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 0.5rem;
}

.rate-value {
    font-size: 4rem;
    font-weight: 700;
    color: white;
    line-height: 1;
    margin-bottom: 0.75rem;
}

.rate-source, .rate-time {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
}

/* Navigation */
.main-nav {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-tabs {
    display: flex;
    list-style: none;
    overflow-x: auto;
}

.nav-tabs li {
    padding: 1rem 1.5rem;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.3s;
    white-space: nowrap;
    color: var(--text-secondary);
}

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

.nav-tabs li.active {
    border-bottom-color: var(--accent-primary);
    color: var(--accent-primary);
}

.nav-tabs i {
    margin-right: 0.5rem;
}

/* Main Content */
.main-content {
    padding: 2rem 0;
    min-height: calc(100vh - 500px);
}

.tab-content {
    display: none;
}

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

.tab-content h2 {
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.tab-content h3 {
    margin: 2rem 0 1rem;
    color: var(--text-secondary);
}

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

.spread-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.spread-asset {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.spread-prices {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
}

.price-item {
    flex: 1;
    text-align: center;
}

.price-item .label {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: block;
    margin-bottom: 0.25rem;
}

.price-item .value {
    font-size: 1.25rem;
    font-weight: 600;
}

.price-item.buy .value {
    color: var(--accent-success);
}

.price-item.sell .value {
    color: var(--accent-danger);
}

.spread-diff {
    text-align: center;
    padding: 0.75rem;
    border-radius: 6px;
    background: var(--bg-secondary);
}

.spread-diff .percentage {
    font-size: 1.5rem;
    font-weight: 700;
    display: block;
}

.spread-diff.positive .percentage {
    color: var(--accent-danger);
}

.spread-diff.negative .percentage {
    color: var(--accent-success);
}

/* Spot Grid */
.spot-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.spot-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.25rem;
}

.spot-symbol {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.spot-price-ves {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: 0.25rem;
}

.spot-price-usd {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.spot-change {
    font-size: 1rem;
    font-weight: 600;
}

.positive {
    color: var(--accent-success);
}

.negative {
    color: var(--accent-danger);
}

/* Data Tables */
.data-table {
    width: 100%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

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

.data-table th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

.data-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

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

.data-table .price {
    font-family: var(--font-mono);
    font-weight: 600;
}

/* Filters */
.filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.filters select {
    padding: 0.75rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
}

/* Badges */
.badge {
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
}

.badge-success {
    background: rgba(16, 185, 129, 0.2);
    color: var(--accent-success);
}

.badge-danger {
    background: rgba(239, 68, 68, 0.2);
    color: var(--accent-danger);
}

/* Calculator */
.calculator-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    max-width: 600px;
    margin: 0 auto;
}

.calc-section {
    margin-bottom: 1.5rem;
}

.calc-section label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.calc-input-group {
    display: flex;
    gap: 0.5rem;
}

.calc-input-group input,
.calc-input-group select {
    padding: 0.75rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 1rem;
}

.calc-input-group input {
    flex: 2;
}

.calc-input-group select {
    flex: 1;
}

.calc-arrow {
    text-align: center;
    font-size: 1.5rem;
    color: var(--text-muted);
    margin: 1rem 0;
}

.btn-primary {
    width: 100%;
    padding: 1rem;
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary:hover {
    background: #2563eb;
    transform: translateY(-1px);
}

/* API Documentation */
.api-endpoints {
    display: grid;
    gap: 1.5rem;
}

.endpoint-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
}

.endpoint-card h3 {
    margin: 0 0 0.75rem 0;
    color: var(--text-primary);
}

.endpoint-url {
    display: block;
    background: var(--bg-secondary);
    padding: 0.75rem 1rem;
    border-radius: 4px;
    font-family: var(--font-mono);
    color: var(--accent-success);
    margin: 0.75rem 0;
    font-size: 0.9rem;
}

.btn-secondary {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 6px;
    margin-top: 0.75rem;
    transition: all 0.3s;
}

.btn-secondary:hover {
    background: var(--bg-hover);
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: 4rem;
}

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

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

.footer-links {
    display: flex;
    gap: 1rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

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

/* Loading */
.loading {
    text-align: center;
    padding: 3rem;
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Responsive */
@media (max-width: 768px) {
    .rate-value {
        font-size: 2.5rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .nav-tabs {
        overflow-x: scroll;
    }
    
    .spreads-grid,
    .spot-grid {
        grid-template-columns: 1fr;
    }
}