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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
    line-height: 1.6;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
}

.nav-menu {
    display: flex;
    gap: 20px;
}

.nav-menu a {
    color: white;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.nav-menu a:hover {
    background-color: rgba(255,255,255,0.2);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

/* Cards */
.card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 20px;
    overflow: hidden;
}

.card-header {
    background: #f8f9fa;
    padding: 20px;
    border-bottom: 1px solid #e9ecef;
}

.card-header h2 {
    color: #495057;
    margin-bottom: 5px;
}

.card-body {
    padding: 20px;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: #495057;
}

.form-control {
    width: 100%;
    padding: 10px;
    border: 1px solid #ced4da;
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

.form-row {
    display: flex;
    gap: 15px;
}

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

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    font-size: 14px;
    font-weight: 500;
    text-align: center;
    transition: all 0.3s;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
    background-color: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background-color: #5a6268;
}

.btn-success {
    background-color: #28a745;
    color: white;
}

.btn-success:hover {
    background-color: #218838;
}

.btn-danger {
    background-color: #dc3545;
    color: white;
}

.btn-danger:hover {
    background-color: #c82333;
}

.btn-sm {
    padding: 5px 10px;
    font-size: 12px;
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.table th,
.table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #e9ecef;
}

.table th {
    background-color: #f8f9fa;
    font-weight: 600;
    color: #495057;
}

.table tr:hover {
    background-color: #f8f9fa;
}

/* Status badges */
.badge {
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
}

.badge-pending {
    background-color: #ffc107;
    color: #212529;
}

.badge-progress {
    background-color: #17a2b8;
    color: white;
}

.badge-completed {
    background-color: #28a745;
    color: white;
}

.badge-cancelled {
    background-color: #dc3545;
    color: white;
}

/* Grid */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

/* Login page */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-card {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    width: 100%;
    max-width: 400px;
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h2 {
    color: #333;
    margin-bottom: 10px;
}

/* Alerts */
.alert {
    padding: 12px 20px;
    border-radius: 4px;
    margin-bottom: 20px;
}

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

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

.alert-info {
    background-color: #cce6ff;
    border: 1px solid #b8daff;
    color: #004085;
}

/* 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);
}

.modal-content {
    background-color: white;
    margin: 15% auto;
    padding: 20px;
    border-radius: 8px;
    width: 80%;
    max-width: 500px;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close:hover {
    color: black;
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .form-row {
        flex-direction: column;
    }
    
    .table {
        font-size: 12px;
    }
    
    .table th,
    .table td {
        padding: 8px;
    }
}

/* File upload area */
.file-upload-area {
    border: 2px dashed #ced4da;
    border-radius: 4px;
    padding: 20px;
    text-align: center;
    transition: border-color 0.3s;
}

.file-upload-area:hover {
    border-color: #667eea;
}

.file-upload-area.dragover {
    border-color: #667eea;
    background-color: #f8f9ff;
}

/* Comments section */
.comments-section {
    max-height: 400px;
    overflow-y: auto;
    border: 1px solid #e9ecef;
    border-radius: 4px;
    padding: 15px;
}

.comment {
    border-bottom: 1px solid #e9ecef;
    padding-bottom: 10px;
    margin-bottom: 10px;
}

.comment:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.comment-author {
    font-weight: 600;
    color: #495057;
}

.comment-date {
    font-size: 12px;
    color: #6c757d;
}

.comment-text {
    margin-top: 5px;
}

/* Task list */
.task-list {
    list-style: none;
}

.task-item {
    padding: 10px;
    border: 1px solid #e9ecef;
    border-radius: 4px;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.task-item.completed {
    background-color: #f8f9fa;
    text-decoration: line-through;
}

/* Links section */
.links-list {
    list-style: none;
}

.link-item {
    padding: 10px;
    border: 1px solid #e9ecef;
    border-radius: 4px;
    margin-bottom: 10px;
}

.link-item a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.link-item a:hover {
    text-decoration: underline;
}

.link-description {
    font-size: 14px;
    color: #6c757d;
    margin-top: 5px;
}

/* Stats cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    border-radius: 8px;
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 14px;
    opacity: 0.9;
}