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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: #333;
    background-color: #f5f5f5;
}

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

h1, h2, h3 {
    margin-bottom: 16px;
    color: #1a1a1a;
}

h1 { font-size: 28px; }
h2 { font-size: 22px; }
h3 { font-size: 18px; }

/* Navigation */
.main-nav {
    background: #2c3e50;
    color: #fff;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
}

.nav-brand {
    font-size: 20px;
    font-weight: bold;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 20px;
}

.nav-links a {
    color: #fff;
    text-decoration: none;
    padding: 16px 0;
    display: block;
}

.nav-links a:hover {
    color: #3498db;
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-user span {
    color: #ccc;
}

.btn-logout {
    color: #e74c3c !important;
    text-decoration: none;
    padding: 6px 12px;
    border: 1px solid #e74c3c;
    border-radius: 4px;
}

.btn-logout:hover {
    background: #e74c3c;
    color: #fff !important;
}

/* Content */
.content {
    padding: 20px 0;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.page-header h1 {
    margin: 0;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 20px;
    background: #3498db;
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    font-size: 14px;
}

.btn:hover {
    background: #2980b9;
}

.btn-primary {
    background: #27ae60;
}

.btn-primary:hover {
    background: #219a52;
}

.btn-large {
    padding: 16px 32px;
    font-size: 18px;
}

/* Forms */
.form {
    max-width: 500px;
    background: #fff;
    padding: 24px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

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

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: #555;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3498db;
}

.form-group textarea {
    min-height: 80px;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.checkbox-group input {
    width: auto;
}

/* Tables */
.data-table {
    width: 100%;
    background: #fff;
    border-collapse: collapse;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.data-table th,
.data-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.data-table th {
    background: #34495e;
    color: #fff;
    font-weight: 500;
}

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

.data-table tfoot td {
    background: #ecf0f1;
    font-weight: 500;
}

/* Alerts */
.alert {
    padding: 12px 16px;
    border-radius: 4px;
    margin-bottom: 16px;
}

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

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

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

.badge-active { background: #27ae60; color: #fff; }
.badge-inactive { background: #95a5a6; color: #fff; }

.badge-submitted { background: #95a5a6; color: #fff; }
.badge-approved { background: #3498db; color: #fff; }
.badge-partial { background: #f39c12; color: #fff; }
.badge-paid { background: #27ae60; color: #fff; }

.badge-labor { background: #3498db; color: #fff; }
.badge-equipment { background: #e67e22; color: #fff; }
.badge-subcontractor { background: #9b59b6; color: #fff; }

/* KPI Cards */
.kpi-row {
    display: flex;
    gap: 20px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.kpi-card {
    flex: 1;
    min-width: 200px;
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.kpi-label {
    font-size: 14px;
    color: #7f8c8d;
    margin-bottom: 8px;
}

.kpi-value {
    font-size: 28px;
    font-weight: 600;
    color: #2c3e50;
}

.kpi-warning .kpi-value {
    color: #e74c3c;
}

.kpi-good .kpi-value {
    color: #27ae60;
}

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

.login-container {
    background: #fff;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.login-container h1 {
    margin-bottom: 8px;
    color: #2c3e50;
}

.login-container h2 {
    font-size: 16px;
    color: #7f8c8d;
    margin-bottom: 24px;
}

.login-form .form-group {
    text-align: left;
}

/* Error Page */
.error-page {
    text-align: center;
    padding: 60px 20px;
}

.error-page h1 {
    font-size: 48px;
    color: #e74c3c;
    margin-bottom: 16px;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 40px;
    color: #7f8c8d;
    background: #fff;
    border-radius: 8px;
}

/* Welcome Section */
.welcome-section {
    text-align: center;
    padding: 60px 20px;
    background: #fff;
    border-radius: 8px;
}

.welcome-section h1 {
    margin-bottom: 8px;
}

/* Summary Section */
.summary-section {
    margin-top: 24px;
    padding: 20px;
    background: #fff;
    border-radius: 8px;
}

.summary-section p {
    margin-bottom: 8px;
}

/* Filter Form */
.filter-form {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
    align-items: center;
    flex-wrap: wrap;
}

.filter-form label {
    font-weight: 500;
}

.filter-form select {
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

/* Text Colors */
.text-warning { color: #e74c3c; }
.text-good { color: #27ae60; }

/* Responsive */
@media (max-width: 768px) {
    .kpi-row {
        flex-direction: column;
    }
    
    .kpi-card {
        min-width: 100%;
    }
    
    .data-table {
        display: block;
        overflow-x: auto;
    }
    
    .main-nav {
        flex-direction: column;
        height: auto;
        padding: 16px;
    }
    
    .nav-links {
        flex-direction: column;
        gap: 8px;
        width: 100%;
    }
    
    .nav-links li {
        text-align: center;
    }
}