/* Global Styles */
:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background-color: var(--light-color);
}

/* Dashboard Cards */
.stat-card {
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

/* Forms */
.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

/* Tables */
.table-hover tbody tr:hover {
    background-color: rgba(0, 123, 255, 0.05);
}

/* Buttons */
.btn {
    border-radius: 5px;
    padding: 8px 16px;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}

/* Navigation */
.navbar {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
    font-weight: bold;
}

/* Sidebar */
.sidebar {
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    padding-top: 60px;
    background-color: var(--dark-color);
    color: white;
}

.sidebar .nav-link {
    color: rgba(255, 255, 255, 0.8);
    padding: 10px 20px;
    margin: 5px 0;
    border-radius: 5px;
}

.sidebar .nav-link:hover {
    color: white;
    background-color: rgba(255, 255, 255, 0.1);
}

.sidebar .nav-link.active {
    color: white;
    background-color: var(--primary-color);
}

/* Calendar */
.calendar-event {
    padding: 5px;
    margin: 2px 0;
    border-radius: 3px;
    font-size: 0.9em;
}

.calendar-event.accepted {
    background-color: var(--success-color);
    color: white;
}

.calendar-event.pending {
    background-color: var(--warning-color);
    color: black;
}

.calendar-event.revisit {
    background-color: var(--info-color);
    color: white;
}

/* Responsive Design */
@media (max-width: 768px) {
    .sidebar {
        position: static;
        height: auto;
        padding-top: 0;
    }

    .content {
        margin-left: 0;
    }
}

/* Custom Animations */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

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

/* Utility Classes */
.cursor-pointer {
    cursor: pointer;
}

.text-truncate-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Form Validation Styles */
.is-invalid {
    border-color: var(--danger-color) !important;
}

.invalid-feedback {
    color: var(--danger-color);
    font-size: 0.875em;
    margin-top: 0.25rem;
}