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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

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

.login-container {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
}

.login-container h1 {
    color: #333;
    margin-bottom: 10px;
    font-size: 24px;
}

.login-container p {
    color: #666;
    margin-bottom: 30px;
}

.login-form .form-group {
    margin-bottom: 20px;
}

.login-form label {
    display: block;
    margin-bottom: 5px;
    color: #555;
    font-weight: 500;
}

.login-form input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    transition: border-color 0.3s;
}

.login-form input:focus {
    outline: none;
    border-color: #667eea;
}

/* Header */
.header {
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 15px 0;
    margin-bottom: 30px;
}

.header h1 {
    font-size: 20px;
    color: #333;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 20px;
}

.active-period {
    color: #10b981;
    background: #d1fae5;
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 14px;
}

.inactive-period {
    color: #ef4444;
    background: #fee2e2;
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 14px;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: #667eea;
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background: #5a67d8;
    transform: translateY(-2px);
}

.btn-success {
    background: #10b981;
    color: white;
}

.btn-success:hover {
    background: #059669;
}

.btn-info {
    background: #3b82f6;
    color: white;
}

.btn-info:hover {
    background: #2563eb;
}

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

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Actions panel */
.actions-panel {
    background: white;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

/* Table */
.table-container {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    background: #f8f9fa;
    padding: 15px;
    text-align: left;
    font-weight: 600;
    color: #555;
    border-bottom: 2px solid #dee2e6;
}

td {
    padding: 12px 15px;
    border-bottom: 1px solid #dee2e6;
}

tr:last-child td {
    border-bottom: none;
}

tr:hover {
    background: #f8f9fa;
}

input[type="number"] {
    width: 120px;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

input[type="number"]:focus {
    outline: none;
    border-color: #667eea;
}

input[type="number"]:disabled {
    background: #f5f5f5;
    cursor: not-allowed;
}

/* Status colors */
tr.changed td {
    background-color: #fff3cd;
}

tr.error td {
    background-color: #f8d7da;
}

tr.error input {
    border-color: #dc3545;
}

.status {
    font-size: 12px;
}

.error-message {
    background: #f8d7da;
    color: #721c24;
    padding: 12px;
    border-radius: 5px;
    margin-bottom: 20px;
}

.success-message {
    background: #d4edda;
    color: #155724;
    padding: 12px;
    border-radius: 5px;
    margin-bottom: 20px;
}

#message {
    margin-bottom: 20px;
}

/* Responsive */
@media (max-width: 780px) {
    .table-container {
        overflow-x: auto;
    }
    
    .actions-panel {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
}
.btn-warning {
    background: #f59e0b;
    color: white;
}

.btn-warning:hover {
    background: #d97706;
}