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

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

/* Header */
.header {
    background: #2c3e50;
    color: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header h1 {
    font-size: 1.5rem;
}

.nav {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.nav a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background 0.3s;
}

.nav a:hover {
    background: #34495e;
}

.user-info {
    display: flex;
    gap: 1rem;
    align-items: center;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

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

.login-box {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
}

.login-box h2 {
    margin-bottom: 1.5rem;
    text-align: center;
}

/* Forms */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

/* Buttons */
.btn-primary, .btn-success, .btn-info, .btn-warning, .btn-secondary {
    display: inline-block;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
    font-size: 1rem;
    transition: opacity 0.3s;
}

.btn-primary { background: #3498db; color: white; }
.btn-success { background: #27ae60; color: white; }
.btn-info { background: #16a085; color: white; }
.btn-warning { background: #f39c12; color: white; }
.btn-secondary { background: #95a5a6; color: white; }
.btn-danger { background: #e74c3c; color: white; }
.btn-small { padding: 0.25rem 0.5rem; font-size: 0.875rem; }

button:hover, .btn:hover {
    opacity: 0.9;
}

/* Dashboard */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    text-align: center;
}

.stat-value {
    font-size: 2rem;
    font-weight: bold;
    color: #3498db;
}

.stat-label {
    margin-top: 0.5rem;
    color: #7f8c8d;
}

/* Clients Grid */
.clients-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.client-card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.client-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.client-link {
    display: block;
    padding: 1.5rem;
    text-decoration: none;
    color: #333;
}

.client-card h3 {
    margin-bottom: 0.5rem;
    color: #2c3e50;
}

.tin {
    color: #7f8c8d;
    font-size: 0.875rem;
    margin: 0.5rem 0;
}

/* Task Cards */
.task-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.task-card {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.task-card.overdue {
    border-left: 4px solid #e74c3c;
}

.task-content {
    flex: 1;
}

.task-content h3 {
    margin-bottom: 0.5rem;
    color: #2c3e50;
}

.task-meta {
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: #7f8c8d;
}

.badge-overdue {
    display: inline-block;
    background: #e74c3c;
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    margin-left: 0.5rem;
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

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

.error {
    background: #f8d7da;
    color: #721c24;
    padding: 0.75rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.success {
    background: #d4edda;
    color: #155724;
    padding: 0.75rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

/* Page Header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

/* Sections */
.section {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

.section h2 {
    margin-bottom: 1rem;
    color: #2c3e50;
}

.dashboard-sections {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
}

.quick-actions {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.quick-actions a {
    text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
    .dashboard-sections {
        grid-template-columns: 1fr;
    }
    
    .header {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav {
        flex-wrap: wrap;
        justify-content: center;
    }
}