:root {
    --primary-color: #0066cc;
    --secondary-color: #004080;  
    --accent-color: #00a0ff;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --light-blue: #e6f3ff;
    --dive-available-bg: #4a90e2;
    --dive-available-border: #357abd;
    --dive-full-bg: #ff6b6b;
    --dive-full-border: #ff5252;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #e9e9e9 0%, #d5c6bc 100%);
    min-height: 100vh;
}

.navbar {
    background: rgba(255, 255, 255, 0.95) !important;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
}

.navbar-brand {
    font-weight: bold;
    color: var(--primary-color) !important;
    font-size: 1.5rem;
}

.nav-link {
    color: var(--secondary-color) !important;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--accent-color) !important;
}

.card {
    border: none;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

.card-header {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    border-radius: 15px 15px 0 0 !important;
    font-weight: bold;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border: none;
    border-radius: 25px;
    padding: 10px 25px;
    font-weight: 500;
    transition: transform 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color), #20c997);
    border: none;
    border-radius: 25px;
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color), #e74c3c);
    border: none;
    border-radius: 25px;
}

.form-control, .form-select {
    border-radius: 10px;
    border: 2px solid #e9ecef;
    transition: border-color 0.3s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 160, 255, 0.25);
}

.table {
    border-radius: 10px;
    overflow: hidden;
}

.table thead th {
    background: var(--primary-color);
    color: white;
    border: none;
}

.calendar-container {
    background: white;
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.fc-toolbar-title {
    color: var(--primary-color) !important;
    font-weight: bold !important;
}

.fc-button-primary {
    background: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
}

.fc-button-primary:hover {
    background: var(--secondary-color) !important;
}

/* Estilos mejorados para las inmersiones en el calendario */
.dive-available {
    background-color: var(--dive-available-bg) !important;
    border-color: var(--dive-available-border) !important;
    color: white !important;
    font-weight: 500 !important;
}

.dive-available:hover {
    background-color: var(--dive-available-border) !important;
    cursor: pointer;
}

.dive-full {
    background-color: var(--dive-full-bg) !important;
    border-color: var(--dive-full-border) !important;
    color: white !important;
    font-weight: 500 !important;
}

.dive-full:hover {
    background-color: var(--dive-full-border) !important;
    cursor: pointer;
}

/* Mejorar la legibilidad del texto en los eventos del calendario */
.fc-event-title {
    color: white !important;
    font-weight: 500 !important;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
}

.fc-event-time {
    color: rgba(255,255,255,0.9) !important;
    font-weight: 400 !important;
}

.modal-content {
    border-radius: 15px;
    border: none;
}

.modal-header {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    border-radius: 15px 15px 0 0;
}

.alert {
    border-radius: 10px;
    border: none;
}

.footer {
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 20px 0;
    margin-top: 50px;
}

.loading {
    display: none;
    text-align: center;
    padding: 20px;
}

.spinner-border {
    color: var(--primary-color);
}

@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .card {
        margin-bottom: 20px;
    }
}