:root {
  /* Paleta profesional simplificada */
  --bg-dark: #1a1a2e;          /* Azul marino oscuro profesional */
  --bg-light: #16213e;         /* Azul marino medio */
  --primary: #2563eb;          /* Azul corporativo principal */
  --primary-light: #3b82f6;    /* Azul corporativo claro */
  --accent: #f59e0b;           /* Naranja profesional para CTAs */
  --accent-light: #fbbf24;     /* Naranja claro */
  --success: #10b981;          /* Verde profesional */
  --danger: #ef4444;           /* Rojo profesional */
  --text-primary: #1f2937;     /* Texto principal oscuro */
  --text-secondary: #6b7280;   /* Texto secundario */
  --text-light: #f8fafc;       /* Texto claro */
  --text-muted: #9ca3af;       /* Texto sutil */
  --bg-white: #ffffff;         /* Fondo blanco */
  --bg-gray-50: #f9fafb;       /* Fondo gris muy claro */
  --bg-gray-75: #d7e2ed;       /* Fondo gris muy claro */
  --bg-gray-100: #f3f4f6;      /* Fondo gris claro */
  --border-gray: #e5e7eb;      /* Bordes grises */

  /* Gradientes profesionales */
  --primary-gradient: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  --accent-gradient: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
  --success-gradient: linear-gradient(135deg, var(--success) 0%, #059669 100%);
  --dark-gradient: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-light) 100%);
  
  /* Sombras profesionales */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 25px rgba(0, 0, 0, 0.15);
  --shadow-primary: 0 4px 14px rgba(37, 99, 235, 0.25);
  --shadow-accent: 0 4px 14px rgba(245, 158, 11, 0.25);
  
  --border-radius: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);

  /* Responsive variables */
  --container-padding: clamp(15px, 4vw, 40px);
  --font-size-base: clamp(14px, 2.5vw, 16px);
  --font-size-h1: clamp(1.8rem, 5vw, 2.5rem);
  --font-size-h2: clamp(1.2rem, 3.5vw, 1.5rem);
  --spacing-small: clamp(10px, 2vw, 20px);
  --spacing-medium: clamp(20px, 4vw, 30px);
  --spacing-large: clamp(30px, 6vw, 50px);
}

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

body {
  font-family: "Inter", sans-serif;
  background: var(--dark-gradient);
  min-height: 100vh;
  padding: var(--spacing-small);
  line-height: 1.6;
  font-size: var(--font-size-base);
  color: var(--text-primary);
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
}

.container {
  background: rgba(230, 241, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: var(--container-padding);
  border-radius: var(--border-radius);
  max-width: min(900px, 95vw);
  margin: auto;
  box-shadow: var(--card-shadow);
  transition: var(--transition);
  width: 100%;
}

.container:hover {
  box-shadow: var(--shadow-lg);
}

h1 {
  text-align: center;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: var(--font-size-h1);
  font-weight: 700;
  margin-bottom: 10px;
  word-wrap: break-word;
}

.subtitle {
  text-align: center;
  color: var(--bg-dark);
  font-size: clamp(1rem, 2.8vw, 1.1rem);
  margin-bottom: var(--spacing-medium);
  font-weight: 300;
  line-height: 1.5;
}

.form-container {
  background: var(--bg-gray-50);
  padding: var(--spacing-medium);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-medium);
  border: 1px solid var(--border-gray);
}

label {
  display: block;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
  font-size: clamp(0.9rem, 2.5vw, 1rem);
}

select {
  width: 100%;
  padding: clamp(12px, 3vw, 15px) clamp(16px, 4vw, 20px);
  font-size: clamp(14px, 2.5vw, 16px);
  border: 2px solid var(--border-gray);
  border-radius: 10px;
  background: var(--bg-white);
  transition: var(--transition);
  appearance: none;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
  background-position: right 12px center;
  background-repeat: no-repeat;
  background-size: 16px;
  padding-right: 40px;
  min-height: 48px;
  color: var(--text-primary);
}

select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.btn {
  width: 100%;
  padding: clamp(12px, 3vw, 15px);
  margin-top: 15px;
  background: var(--primary-gradient);
  color: var(--text-light);
  border: none;
  border-radius: 10px;
  font-size: clamp(1rem, 2.8vw, 1.1rem);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  min-height: 48px;
  -webkit-tap-highlight-color: transparent;
  box-shadow: var(--shadow-primary);
}

.btn:hover,
.btn:focus {
  transform: translateY(-2px);
  box-shadow: var(--shadow-primary);
  outline: none;
}

.btn:active {
  transform: translateY(0);
}

.info-box {
  background: var(--bg-gray-50);
  padding: var(--spacing-small);
  border-radius: var(--border-radius);
  margin: var(--spacing-small) 0;
  border-left: 4px solid var(--primary);
  font-size: clamp(0.85rem, 2.3vw, 0.95rem);
  line-height: 1.6;
  color: var(--text-primary);
}

.info-box i {
  color: var(--primary);
  margin-right: 10px;
  font-size: 1.2em;
}

.timezone-info {
  background: var(--bg-gray-50);
  padding: var(--spacing-small);
  border-radius: var(--border-radius);
  margin: var(--spacing-small) 0;
  text-align: center;
  border-left: 4px solid var(--accent);
}

.timezone-info h2 {
  color: var(--text-primary);
  margin-bottom: 10px;
  font-size: var(--font-size-h2);
  word-wrap: break-word;
}

.timezone-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
}

.current-time {
  font-size: clamp(1.1rem, 3vw, 1.3rem);
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 10px;
}

.refresh-btn {
  background: var(--accent-gradient);
  color: var(--text-light);
  border: none;
  padding: clamp(8px, 2vw, 10px) clamp(16px, 3vw, 20px);
  border-radius: 8px;
  font-size: clamp(0.8rem, 2.2vw, 0.9rem);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: var(--shadow-accent);
  min-height: 40px;
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
}

.refresh-btn:hover,
.refresh-btn:focus {
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent);
  outline: none;
}

.refresh-btn:active {
  transform: translateY(0);
}

.refresh-btn.refreshing {
  background: var(--primary-gradient);
  pointer-events: none;
}

.refresh-btn.refreshing i {
  animation: spin 1s linear infinite;
}

/* Responsive Table Styles */
.table-container {
  overflow-x: auto;
  margin-top: var(--spacing-small);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-md);
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border-gray);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 600px;
  background: var(--bg-white);
}

th {
  background: var(--primary-gradient);
  color: var(--text-light);
  padding: clamp(12px, 3vw, 18px) clamp(8px, 2vw, 15px);
  text-align: center;
  font-weight: 600;
  font-size: clamp(0.85rem, 2.3vw, 1rem);
  letter-spacing: 0.5px;
  white-space: nowrap;
}

td {
  padding: clamp(10px, 2.5vw, 15px);
  text-align: center;
  border-bottom: 1px solid var(--border-gray);
  transition: var(--transition);
  font-size: clamp(0.8rem, 2.2vw, 0.9rem);
}

tr:hover td {
  background-color: var(--bg-gray-75);
}

.forex-market {
  background: rgba(16, 185, 129, 0.05);
  border-left: 4px solid var(--success);
}

.stock-market {
  background: rgba(245, 158, 11, 0.05);
  border-left: 4px solid var(--accent);
}

.session-name {
  font-weight: 600;
  font-size: clamp(0.9rem, 2.5vw, 1.1rem);
  color: var(--text-primary);
  line-height: 1.3;
}

.time-display {
  font-size: clamp(1rem, 2.8vw, 1.2rem);
  font-weight: 600;
  color: var(--primary);
}

.dst-info {
  font-size: clamp(0.75rem, 2vw, 0.9rem);
  color: var(--text-primary);
  background: var(--bg-gray-100);
  padding: 4px 8px;
  border-radius: 15px;
  display: inline-block;
  border: 1px solid var(--border-gray);
}

.day-indicator {
  font-size: clamp(0.7rem, 1.8vw, 0.85rem);
  color: var(--text-muted);
  font-style: italic;
}

.legend {
  background: var(--bg-gray-50);
  padding: var(--spacing-medium);
  border-radius: var(--border-radius);
  margin-top: var(--spacing-medium);
  border: 1px solid var(--border-gray);
}

.legend h3 {
  color: var(--text-primary);
  margin-bottom: 15px;
  font-size: clamp(1.1rem, 3vw, 1.2rem);
}

.legend-item {
  display: inline-block;
  margin: 5px 10px 5px 0;
  padding: 8px 15px;
  border-radius: 20px;
  font-size: clamp(0.8rem, 2.2vw, 0.9rem);
  font-weight: 500;
}

.legend-forex {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
  border: 1px solid var(--success);
}

.legend-stock {
  background: rgba(245, 158, 11, 0.1);
  color: var(--accent);
  border: 1px solid var(--accent);
}

.loading {
  display: none;
  text-align: center;
  padding: var(--spacing-small);
}

.spinner {
  border: 3px solid var(--border-gray);
  border-top: 3px solid var(--primary);
  border-radius: 50%;
  width: 30px;
  height: 30px;
  animation: spin 1s linear infinite;
  display: inline-block;
  margin-right: 10px;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* Estados de sesión actualizados */
.status-open {
  color: var(--success);
  font-weight: 600;
}

.status-closed {
  color: var(--danger);
  font-weight: 600;
}

.session-open {
  background-color: rgba(16, 185, 129, 0.05);
  border-left: 4px solid var(--success);
}

.session-closed {
  background-color: rgba(239, 68, 68, 0.05);
  border-left: 4px solid var(--danger);
}

/* Mobile-specific media queries */
@media (max-width: 480px) {
  body {
    padding: 5px;
  }

  .container {
    border-radius: 10px;
    max-width: 100%;
  }

  .timezone-header {
    flex-direction: column;
    gap: 10px;
  }

  .refresh-btn {
    font-size: 0.75rem;
    padding: 6px 12px;
    margin-top: 10px;
  }

  .table-container {
    margin: 10px -20px 0;
    border-radius: 0;
  }

  table {
    min-width: 500px;
  }

  th,
  td {
    padding: 8px 6px;
  }

  .session-name {
    font-size: 0.8rem;
  }

  .time-display {
    font-size: 0.9rem;
  }

  .dst-info {
    font-size: 0.7rem;
    padding: 2px 6px;
  }

  .legend {
    margin: 15px -20px 0;
    border-radius: 0;
  }

  .legend-item {
    display: block;
    margin: 5px 0;
    text-align: center;
  }

  .info-box {
    margin: 10px -20px;
    border-radius: 0;
    font-size: 0.8rem;
  }
}

/* Tablet media queries */
@media (min-width: 481px) and (max-width: 768px) {
  .timezone-header {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
  }

  .refresh-btn {
    margin-top: 0;
  }

  table {
    min-width: 650px;
  }
}

/* Large screen optimizations */
@media (min-width: 1200px) {
  .container {
    max-width: 1000px;
  }

  tr:hover td {
    transform: scale(1.012);
  }
}

/* Accessibility improvements */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .container {
    border: 2px solid var(--primary);
  }

  th {
    background: var(--text-primary);
    color: var(--text-light);
  }

  .btn {
    background: var(--text-primary);
    border: 2px solid var(--primary);
  }
}

/* Print styles */
@media print {
  body {
    background: white;
    color: black;
  }

  .container {
    box-shadow: none;
    background: white;
  }

  .refresh-btn,
  .btn {
    display: none;
  }
}