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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #333;
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    background: white;
    min-height: 100vh;
    box-shadow: 0 0 30px rgba(0,0,0,0.1);
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid #eee;
}

header h1 {
    color: #2c3e50;
    margin-bottom: 10px;
    font-size: 2.5em;
}

header p {
    color: #7f8c8d;
    font-size: 1.2em;
}

/* Navegación */
.navigation {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 10px;
}

.nav-btn {
    background: #ecf0f1;
    color: #2c3e50;
    border: none;
    padding: 12px 24px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.3s ease;
    margin: 5px;
}

.nav-btn:hover {
    background: #bdc3c7;
}

.nav-btn.active {
    background: #3498db;
    color: white;
}

/* Secciones */
.section {
    display: none;
    margin-bottom: 30px;
    background: #f8f9fa;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.section.active {
    display: block;
    animation: fadeIn 0.5s ease-in;
}

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

.section h2 {
    color: #2c3e50;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid #3498db;
}

/* Estadísticas */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 25px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-number {
    font-size: 2.8em;
    font-weight: bold;
    margin-bottom: 8px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.stat-label {
    font-size: 1.1em;
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Acciones rápidas */
.quick-actions {
    background: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    margin-bottom: 30px;
}

.quick-actions h3 {
    margin-bottom: 20px;
    color: #2c3e50;
    text-align: center;
}

.btn-primary {
    background: #3498db;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 5px;
    cursor: pointer;
    margin: 10px;
    font-size: 16px;
    transition: background 0.3s ease;
}

.btn-primary:hover {
    background: #2980b9;
}

.btn-secondary {
    background: #2ecc71;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 5px;
    cursor: pointer;
    margin: 10px;
    font-size: 16px;
    transition: background 0.3s ease;
}

.btn-secondary:hover {
    background: #27ae60;
}

.btn-tertiary {
    background: #9b59b6;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 5px;
    cursor: pointer;
    margin: 10px;
    font-size: 16px;
    transition: background 0.3s ease;
}

.btn-tertiary:hover {
    background: #8e44ad;
}

/* Formularios */
.form-container {
    background: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    margin-bottom: 30px;
}

.form-container h3 {
    margin-bottom: 20px;
    color: #2c3e50;
    border-bottom: 2px solid #eee;
    padding-bottom: 10px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #2c3e50;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 5px rgba(52, 152, 219, 0.3);
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
}

/* Tablas */
.table-container {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    margin-top: 20px;
}

.table-container h3 {
    background: #3498db;
    color: white;
    padding: 15px 20px;
    margin: 0;
}

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

th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th {
    background-color: #f8f9fa;
    font-weight: 600;
    color: #2c3e50;
}

tr:hover {
    background-color: #f5f5f5;
}

/* Estados de prospectos */
.status-new { color: #17a2b8; }
.status-contacted { color: #ffc107; }
.status-interested { color: #28a745; }
.status-not_interested { color: #dc3545; }
.status-follow_up_needed { color: #fd7e14; }
.status-appointment_scheduled { color: #6f42c1; }
.status-closed_won { color: #20c997; }
.status-closed_lost { color: #6c757d; }

/* Información del sistema */
.system-info {
    background: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    margin-top: 30px;
}

.system-info h3 {
    margin-bottom: 20px;
    color: #2c3e50;
    border-bottom: 2px solid #eee;
    padding-bottom: 10px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.info-item {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 8px;
    border-left: 4px solid #3498db;
}

.info-item strong {
    display: block;
    margin-bottom: 5px;
    color: #2c3e50;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    header h1 {
        font-size: 2em;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .navigation {
        flex-direction: column;
        align-items: center;
    }
    
    .nav-btn {
        width: 100%;
        margin: 5px 0;
    }
    
    th, td {
        padding: 10px 8px;
        font-size: 14px;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
}

/* Cargando */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 10px;
}

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

/* Mensajes */
.message {
    padding: 15px;
    margin: 15px 0;
    border-radius: 5px;
    font-weight: 500;
}

.message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.message.warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}