/* Global Styles */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --light-bg: #f3f4f6;
    --border-color: #e5e7eb;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: #fff;
    color: var(--text-dark);
    line-height: 1.6;
}

/* Container and Layout */
.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0;
}

header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 40px 20px;
    text-align: center;
    box-shadow: var(--shadow);
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.95;
}

main {
    padding: 30px 20px;
}

.content-wrapper {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 30px;
    max-width: 1600px;
    margin: 0 auto;
}

/* Sidebar */
.sidebar {
    background: var(--light-bg);
    padding: 20px;
    border-radius: 12px;
    height: fit-content;
    position: sticky;
    top: 20px;
}

.sidebar h2 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--text-dark);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 10px;
}

/* Filters */
.filters {
    margin-bottom: 30px;
}

.filter-group {
    margin-bottom: 15px;
}

.filter-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 5px;
    color: var(--text-dark);
    font-size: 0.95rem;
}

.source-checkboxes {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 8px 0;
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    user-select: none;
    gap: 8px;
}

.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.checkbox-label span {
    font-size: 0.95rem;
    color: var(--text-dark);
}

.filter-group select,
.filter-group input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.95rem;
    background-color: white;
    color: var(--text-dark);
    transition: border-color 0.3s ease;
}

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

/* Webinar List */
.webinar-list {
    margin-top: 30px;
}

.list-container {
    max-height: 600px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: white;
}

.webinar-item {
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.3s ease;
}

.webinar-item:hover {
    background-color: var(--light-bg);
    padding-left: 20px;
}

.webinar-item:last-child {
    border-bottom: none;
}

.webinar-item-date {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 0.85rem;
    margin-bottom: 5px;
}

.webinar-item-title {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 0.95rem;
    margin-bottom: 5px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.webinar-item-time {
    font-size: 0.85rem;
    color: var(--text-light);
}

/* Calendar Section */
.calendar-section {
    background: white;
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--shadow);
}

/* FullCalendar Customization */
.fc {
    font-family: inherit;
}

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

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

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

.fc-daygrid-day-frame {
    min-height: 120px;
}

.fc-daygrid-day.fc-day-other {
    background-color: #fafafa;
}

.fc-event {
    background-color: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
    cursor: pointer;
    transition: all 0.3s ease;
}

.fc-event:hover {
    opacity: 0.8;
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.fc-event.has-fee {
    background-color: var(--accent-color) !important;
    border-color: var(--accent-color) !important;
}

.fc-col-header-cell {
    background-color: var(--light-bg);
    font-weight: 600;
    color: var(--text-dark);
}

.fc-daygrid-day-number {
    padding: 8px;
    font-weight: 600;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 0;
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
    max-height: 80vh;
    overflow-y: auto;
}

@keyframes slideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.close {
    color: var(--text-light);
    float: right;
    font-size: 28px;
    font-weight: bold;
    padding: 15px 20px;
    cursor: pointer;
    transition: color 0.3s ease;
}

.close:hover {
    color: var(--text-dark);
}

#modal-body {
    padding: 30px;
}

.modal-header {
    padding: 20px 30px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: start;
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin: 0;
}

.modal-detail {
    margin-bottom: 20px;
}

.modal-detail-label {
    font-weight: 600;
    color: var(--text-light);
    font-size: 0.85rem;
    text-transform: uppercase;
    margin-bottom: 5px;
}

.modal-detail-value {
    font-size: 1.1rem;
    color: var(--text-dark);
}

.modal-actions {
    margin-top: 30px;
    display: flex;
    gap: 10px;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    flex: 1;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-secondary {
    background-color: var(--light-bg);
    color: var(--text-dark);
    flex: 1;
}

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

.fee-badge {
    display: inline-block;
    background-color: var(--accent-color);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-top: 10px;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .content-wrapper {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: relative;
        top: 0;
    }

    header h1 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    main {
        padding: 20px 10px;
    }

    header {
        padding: 30px 15px;
    }

    header h1 {
        font-size: 1.5rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .modal-content {
        width: 95%;
        margin: 20% auto;
    }

    .fc-daygrid-day-frame {
        min-height: 80px;
    }
}

/* Scrollbar Styling */
.list-container::-webkit-scrollbar {
    width: 8px;
}

.list-container::-webkit-scrollbar-track {
    background: var(--light-bg);
    border-radius: 10px;
}

.list-container::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 10px;
}

.list-container::-webkit-scrollbar-thumb:hover {
    background: var(--text-light);
}