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

:root {
    --primary: #3498db;
    --primary-dark: #2980b9;
    --danger: #e74c3c;
    --success: #2ecc71;
    --warning: #f39c12;
    --bg: #f5f7fa;
    --card: #ffffff;
    --text: #2c3e50;
    --text-light: #7f8c8d;
    --border: #dcdde1;
    --radius: 8px;
    --shadow: 0 2px 8px rgba(0,0,0,0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

/* Header */
.header {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header h1 {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-right .user-info {
    font-size: 14px;
    color: var(--text-light);
}

/* Admin Panel */
.admin-panel {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    padding: 8px 24px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.admin-panel .btn {
    font-size: 13px;
    padding: 6px 14px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 8px 20px;
    border: 1px solid var(--border);
    background: var(--card);
    color: var(--text);
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
    text-decoration: none;
}

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

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

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

.btn-danger {
    background: var(--danger);
    color: #fff;
    border-color: var(--danger);
}

.btn-danger:hover {
    background: #c0392b;
    border-color: #c0392b;
}

.btn-sm {
    padding: 4px 10px;
    font-size: 12px;
}

/* Login Overlay */
.login-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.login-box {
    background: var(--card);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    width: 360px;
    max-width: 90vw;
}

.login-box h2 {
    margin-bottom: 24px;
    text-align: center;
    color: var(--primary);
}

.login-box .form-group {
    margin-bottom: 16px;
}

.login-box label {
    display: block;
    margin-bottom: 4px;
    font-size: 14px;
    color: var(--text-light);
}

.form-input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    transition: border-color 0.2s;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(52,152,219,0.1);
}

.login-error {
    color: var(--danger);
    font-size: 13px;
    margin-bottom: 12px;
    display: none;
}

/* App Content */
.app-content {
    padding: 20px;
    max-width: 1400px;
    margin: 0 auto;
}

#loading {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255,255,255,0.8);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 999;
    font-size: 18px;
    color: var(--text-light);
}

/* Calendar Container */
#calendar {
    background: var(--card);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--shadow);
}

/* FullCalendar Overrides */
.fc {
    font-size: 14px;
}

.fc .fc-toolbar-title {
    font-size: 1.3em;
    font-weight: 600;
}

.fc .fc-button-primary {
    background: var(--card);
    border-color: var(--border);
    color: var(--text);
}

.fc .fc-button-primary:hover {
    background: var(--bg);
    border-color: var(--primary);
    color: var(--primary);
}

.fc .fc-button-primary:not(:disabled).fc-button-active,
.fc .fc-button-primary:not(:disabled):active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

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

.fc .fc-daygrid-day-number {
    font-size: 13px;
    font-weight: 500;
    padding: 4px 8px;
}

.fc .fc-day-today {
    background: rgba(52,152,219,0.05) !important;
}

.fc .fc-more-link {
    font-size: 12px;
    color: var(--primary);
}

.fc .fc-event {
    border-radius: 4px;
    padding: 2px 4px;
    font-size: 12px;
    cursor: pointer;
}

.fc .fc-list-event:hover td {
    background: rgba(52,152,219,0.05);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1001;
    overflow-y: auto;
}

.modal-content {
    background: var(--card);
    margin: 60px auto;
    padding: 0;
    border-radius: 12px;
    width: 600px;
    max-width: 95vw;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    position: relative;
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-light);
    padding: 4px 8px;
    border-radius: 4px;
}

.modal-close:hover {
    background: var(--bg);
    color: var(--text);
}

.modal-body {
    padding: 24px;
}

.modal-actions {
    margin-top: 20px;
    display: flex;
    gap: 8px;
    justify-content: flex-end;
}

/* Event Detail */
.event-detail-row {
    margin-bottom: 12px;
}

.event-detail-row .label {
    font-size: 12px;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 2px;
}

.event-detail-row .value {
    font-size: 15px;
}

.category-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.person-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    color: #fff;
    margin: 2px 4px 2px 0;
}

/* Form Styles */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 4px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text);
}

.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    resize: vertical;
    font-family: inherit;
}

.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.form-row {
    display: flex;
    gap: 12px;
}

.form-row .form-group {
    flex: 1;
}

.form-checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

/* Persons checkboxes */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 8px;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.2s;
}

.checkbox-label:hover {
    background: var(--bg);
}

.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
}

/* Admin Modal */
.admin-modal-content {
    width: 800px;
    max-width: 95vw;
}

.admin-tabs {
    display: flex;
    gap: 4px;
    padding: 12px 24px;
    border-bottom: 1px solid var(--border);
    background: var(--bg);
}

.admin-tab {
    padding: 8px 16px;
    border: none;
    background: transparent;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 13px;
    color: var(--text-light);
    transition: all 0.2s;
}

.admin-tab:hover {
    background: var(--card);
    color: var(--text);
}

.admin-tab.active {
    background: var(--primary);
    color: #fff;
}

.admin-list {
    margin-top: 16px;
}

.admin-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 8px;
    background: var(--card);
    transition: box-shadow 0.2s;
}

.admin-item:hover {
    box-shadow: var(--shadow);
}

.admin-item-actions {
    display: flex;
    gap: 4px;
}

.admin-actions {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 12px;
}

.modal-form label {
    display: block;
    margin-bottom: 12px;
    font-size: 13px;
    font-weight: 500;
}

.modal-form .form-input {
    margin-top: 4px;
}

/* Badge */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 11px;
    font-weight: 600;
}

.badge-warning {
    background: var(--warning);
    color: #fff;
}

/* Loading indicator */
.loading {
    text-align: center;
    padding: 40px;
    color: var(--text-light);
}

.error {
    color: var(--danger);
    padding: 12px;
    background: rgba(231,76,60,0.1);
    border-radius: var(--radius);
    margin: 8px 0;
}

/* Responsive */
@media (max-width: 768px) {
    .header {
        padding: 10px 16px;
        flex-wrap: wrap;
    }

    .header h1 {
        font-size: 16px;
    }

    .app-content {
        padding: 10px;
    }

    .modal-content,
    .admin-modal-content {
        margin: 20px auto;
        width: 98vw;
    }

    .modal-body {
        padding: 16px;
    }

    .form-row {
        flex-direction: column;
        gap: 0;
    }

    .admin-tabs {
        overflow-x: auto;
    }

    .admin-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .admin-item-actions {
        align-self: flex-end;
    }
}