:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --secondary: #64748b;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --light: #f8fafc;
    --dark: #1e293b;
    --border: #e2e8f0;
    --shadow: rgba(0, 0, 0, 0.1);
}

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

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

/* Navbar */
.navbar {
    background-color: white;
    border-bottom: 1px solid var(--border);
    padding: 1rem 0;
    box-shadow: 0 2px 4px var(--shadow);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-link {
    color: var(--dark);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    transition: background-color 0.2s;
}

.nav-link:hover {
    background-color: var(--light);
}

.nav-user {
    color: var(--secondary);
    font-weight: 500;
}

.nav-logout {
    color: var(--danger);
}

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

/* Flash Messages */
.flash-messages {
    margin-bottom: 2rem;
}

.alert {
    padding: 1rem 1.5rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.alert-success {
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid #6ee7b7;
}

.alert-danger {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

.alert-warning {
    background-color: #fef3c7;
    color: #92400e;
    border: 1px solid #fde68a;
}

.alert-info {
    background-color: #dbeafe;
    color: #1e40af;
    border: 1px solid #93c5fd;
}

.close-alert {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: inherit;
    opacity: 0.5;
    transition: opacity 0.2s;
}

.close-alert:hover {
    opacity: 1;
}

/* Cards */
.card {
    background: white;
    border-radius: 0.5rem;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 1px 3px var(--shadow);
}

.card h2 {
    margin-bottom: 1.5rem;
    color: var(--dark);
}

/* Login Page */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 80vh;
}

.login-card {
    background: white;
    padding: 3rem;
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px var(--shadow);
    width: 100%;
    max-width: 400px;
}

.login-card h1 {
    text-align: center;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.subtitle {
    text-align: center;
    color: var(--secondary);
    margin-bottom: 2rem;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Forms */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 500;
    color: var(--dark);
}

.form-group input,
.form-group select {
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 0.375rem;
    font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.measurement-form h3 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--dark);
    border-bottom: 2px solid var(--border);
    padding-bottom: 0.5rem;
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 1.25rem;
    height: 1.25rem;
    cursor: pointer;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.375rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: all 0.2s;
    text-align: center;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
}

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

.btn-secondary {
    background-color: var(--secondary);
    color: white;
}

.btn-secondary:hover {
    background-color: #475569;
}

.btn-danger {
    background-color: var(--danger);
    color: white;
}

.btn-danger:hover {
    background-color: #dc2626;
}

.btn-block {
    width: 100%;
}

.btn-small {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
}

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

.dashboard-header h1 {
    color: var(--dark);
}

.stats-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 0.5rem;
    box-shadow: 0 1px 3px var(--shadow);
    border-left: 4px solid var(--primary);
}

.stat-card h3 {
    font-size: 0.875rem;
    color: var(--secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
}

.stat-value {
    font-size: 2rem;
    font-weight: bold;
    color: var(--dark);
    margin-bottom: 0.25rem;
}

.stat-date {
    font-size: 0.875rem;
    color: var(--secondary);
}

/* Tables */
.table-container {
    overflow-x: auto;
}

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

.data-table thead {
    background-color: var(--light);
}

.data-table th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--dark);
    border-bottom: 2px solid var(--border);
}

.data-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
}

.data-table tbody tr:hover {
    background-color: var(--light);
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
}

.badge-admin {
    background-color: #fef3c7;
    color: #92400e;
}

.badge-user {
    background-color: #dbeafe;
    color: #1e40af;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
}

.empty-state h2 {
    color: var(--secondary);
    margin-bottom: 1rem;
}

.empty-state p {
    color: var(--secondary);
    margin-bottom: 2rem;
}

/* Comparison Grid - 2 Columns */
.comparison-grid-two {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.comparison-box {
    background: white;
    border-radius: 0.5rem;
    box-shadow: 0 2px 4px var(--shadow);
    overflow: hidden;
}

.comparison-box.benchmark-box {
    background: #fffbeb;
}

.comparison-box.empty-benchmark {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 2rem;
    text-align: center;
}

.comparison-box.empty-benchmark h3 {
    color: var(--secondary);
    margin-bottom: 1rem;
}

.comparison-box.empty-benchmark p {
    color: var(--secondary);
}

.comparison-header {
    display: grid;
    grid-template-columns: 110px 110px 110px 70px;
    gap: 1rem;
    background: var(--light);
    padding: 1.5rem 1rem;
    border-bottom: 2px solid var(--border);
}

.comparison-box.benchmark-box .comparison-header {
    background: #fef3c7;
}

.header-spacer {
    /* Empty column to match label and change columns */
}

.comparison-col {
    text-align: center;
}

.comparison-col h3 {
    margin: 0 0 0.5rem 0;
    font-size: 1.1rem;
    font-weight: 600;
}

.comparison-col .date {
    font-size: 0.875rem;
    color: var(--secondary);
    margin: 0;
}

.comparison-body {
    padding: 1.5rem;
}

.metric-row {
    display: grid;
    grid-template-columns: 110px 110px 110px 70px;
    align-items: center;
    padding: 0.875rem 0;
    border-bottom: 1px solid #e5e7eb;
    gap: 1rem;
}

.metric-row:last-child {
    border-bottom: none;
}

.metric-label {
    font-weight: 600;
    color: var(--dark);
    font-size: 0.95rem;
    text-align: left;
}

.metric-value {
    text-align: center;
    font-weight: 500;
    font-size: 0.95rem;
}

/* Mobile responsive adjustments */
@media (max-width: 768px) {
    .comparison-grid-two {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .comparison-header {
        grid-template-columns: 80px 90px 90px 60px;
        gap: 0.5rem;
        padding: 1rem 0.5rem;
    }
    
    .comparison-body {
        padding: 1rem 0.5rem;
    }
    
    .metric-row {
        grid-template-columns: 80px 90px 90px 60px;
        gap: 0.5rem;
        padding: 0.75rem 0;
    }
    
    .metric-label {
        font-size: 0.85rem;
    }
    
    .metric-value {
        font-size: 0.85rem;
    }
    
    .comparison-col h3 {
        font-size: 0.95rem;
    }
    
    .comparison-col .date {
        font-size: 0.75rem;
    }
}

/* Mobile responsive styles */
@media (max-width: 768px) {
    .comparison-grid-two {
        grid-template-columns: 1fr;
    }
    
    .comparison-header {
        grid-template-columns: 80px 80px 80px 50px;
        gap: 0.5rem;
        padding: 1rem 0.5rem;
    }
    
    .comparison-col h3 {
        font-size: 0.9rem;
    }
    
    .comparison-col .date {
        font-size: 0.75rem;
    }
    
    .comparison-body {
        padding: 1rem 0.5rem;
    }
    
    .metric-row {
        grid-template-columns: 70px 70px 70px 50px;
        gap: 0.5rem;
        padding: 0.75rem 0;
    }
    
    .metric-label {
        font-size: 0.85rem;
    }
    
    .metric-value {
        font-size: 0.85rem;
    }
}

.metric-value .change {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 700;
    padding: 0.3rem 0.6rem;
    border-radius: 0.25rem;
    text-align: center;
    min-width: 65px;
}

.metric-value .change.positive {
    background-color: #d1fae5;
    color: #065f46;
}

.metric-value .change.negative {
    background-color: #fee2e2;
    color: #991b1b;
}

.metric-value .change.neutral {
    background-color: #f3f4f6;
    color: #6b7280;
    font-weight: 600;
}

.metric-value .change.positive {
    background-color: #d1fae5;
    color: #065f46;
}

.metric-value .change.negative {
    background-color: #fee2e2;
    color: #991b1b;
}

.metric-value .change.neutral {
    background-color: #f3f4f6;
    color: var(--secondary);
}

.comparison-footer {
    padding: 1rem;
    background: var(--light);
    border-top: 1px solid var(--border);
    text-align: center;
}

.comparison-box.benchmark-box .comparison-footer {
    background: #fef3c7;
}

/* Wide table for All Data page */
.data-table-wide {
    font-size: 0.875rem;
}

.data-table-wide th,
.data-table-wide td {
    padding: 0.75rem 0.5rem;
    white-space: nowrap;
}

.actions-cell {
    min-width: 200px;
}

.benchmark-row {
    background-color: #fffbeb;
}

.benchmark-row:hover {
    background-color: #fef3c7 !important;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .dashboard-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .form-actions .btn {
        width: 100%;
    }
}