:root {
    --color-primary: #38d;
    --color-primary-dark: #269;
    --color-dark: #234;
    --color-danger: #e43;
    --color-success: #2a6;
    --color-text: #333;
    --color-text-muted: #888;
    --color-bg: #f5f5f5;
    --color-bg-alt: #f8f8f8;
    --color-border: #ddd;
    --color-border-dark: #aaa;
    --radius-sm: 4px;
    --radius-md: 8px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
}

.container {
    max-width: none;
    margin: 0;
    padding: 20px;
}

/* Header */
header {
    background: var(--color-dark);
    color: white;
    padding: 15px 20px;
    display: flex;
    align-items: center;
    gap: 30px;
    flex-wrap: wrap;
}

header h1 {
    font-size: 1.5rem;
}

nav {
    display: flex;
    gap: 5px;
}

nav a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: background 0.2s, color 0.2s;
}

nav a:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

nav a.active {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

#user-info {
    margin-left: auto;
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Sections */
.section {
    display: none;
    background: white;
    border-radius: var(--radius-md);
    padding: 20px;
    margin-top: 20px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.section.active {
    display: block;
}

.section h2 {
    margin-bottom: 20px;
    color: var(--color-dark);
}

/* Toolbar */
.toolbar {
    margin-bottom: 20px;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

th {
    background: var(--color-bg-alt);
    font-weight: 600;
    color: var(--color-text-muted);
}

tr:hover {
    background: var(--color-bg-alt);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 8px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: white;
    color: var(--color-text);
    cursor: pointer;
    font-size: 0.9rem;
    transition: background 0.2s;
}

.btn:hover {
    background: var(--color-bg-alt);
}

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

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

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

.btn-danger:hover {
    background: var(--color-bg-alt);
    border-color: var(--color-danger);
}

.btn-small {
    padding: 6px 10px;
    font-size: 0.85rem;
    line-height: 1;
    height: 32px;
}

.btn-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-text-muted);
}

.btn-close:hover {
    color: var(--color-text);
}

.btn-arrow {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    padding: 6px 10px;
    font-size: 1rem;
    color: var(--color-text-muted);
    margin: 2px;
    line-height: 1;
    height: 32px;
}

.btn-arrow:hover:not(:disabled) {
    background: var(--color-bg-alt);
    color: var(--color-text);
    border-color: var(--color-border-dark);
}

.btn-arrow:disabled {
    opacity: 0.3;
    cursor: default;
}

.order-buttons {
    white-space: nowrap;
    width: 70px;
}

/* Forms */
.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--color-text-muted);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
}

.input-with-button {
    display: flex;
    gap: 10px;
}

.input-with-button input {
    flex: 1;
}

.input-with-button .btn {
    white-space: nowrap;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: white;
    border-radius: var(--radius-md);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    border-bottom: 1px solid var(--color-border);
}

.modal-header h3 {
    color: var(--color-dark);
}

#modal-body {
    padding: 20px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 15px 20px;
    border-top: 1px solid var(--color-border);
}

/* Login */
.login-container {
    max-width: 400px;
    margin: 100px auto;
    background: white;
    padding: 40px;
    border-radius: var(--radius-md);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.login-container h1 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--color-dark);
}

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

.dashboard-card {
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    padding: 20px;
}

.dashboard-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.dashboard-card h3 {
    margin: 0;
    color: var(--color-dark);
}

.measurement-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--color-border);
}

.measurement-item:last-child {
    border-bottom: none;
}

.measurement-value {
    font-weight: 600;
    color: var(--color-primary);
}

.trend {
    margin-left: 8px;
    font-size: 1rem;
}

.trend-up {
    color: var(--color-danger);
}

.trend-down {
    color: var(--color-success);
}

.trend-stable {
    color: var(--color-text-muted);
}

.measurement-time {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/* Copy link */
.copy-link {
    cursor: pointer;
    color: var(--color-primary);
    text-decoration: underline;
}

.copy-link:hover {
    color: var(--color-primary-dark);
}

/* Utility */
.hidden {
    display: none !important;
}

.text-muted {
    color: var(--color-text-muted);
}

/* Charts */
.chart-controls {
    display: flex;
    gap: 20px;
    align-items: flex-end;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.chart-controls .form-group {
    margin-bottom: 0;
    min-width: 150px;
}

.chart-toggles {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.chart-toggle {
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    padding: 5px 10px;
    border-radius: var(--radius-sm);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    transition: background 0.15s, border-color 0.15s;
}

.chart-toggle:hover {
    background: var(--color-bg-alt);
    border-color: var(--color-border-dark);
}

.chart-toggle input {
    cursor: pointer;
}

.chart-toggle-color {
    width: 12px;
    height: 12px;
    border-radius: 2px;
}

.chart-container {
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 10px;
    margin-bottom: 15px;
}

#chart-canvas {
    width: 100%;
    height: 400px;
}

@media (max-width: 600px) {
    .container {
        padding: 0;
    }
    .section {
        padding: 10px;
        margin-top: 0;
        border-radius: 0;
    }
    .section h2 {
        margin-bottom: 10px;
    }
    .chart-container {
        padding: 0;
        margin: 0 -10px;
        border-radius: 0;
        border-left: none;
        border-right: none;
    }
    #chart-canvas {
        height: 280px;
    }
    .chart-controls {
        padding: 0 10px;
        gap: 10px;
    }
    .chart-toggles {
        padding: 0 10px;
        gap: 8px;
        margin-bottom: 10px;
    }
    .chart-legend {
        padding: 5px 10px;
        gap: 10px;
    }
}

.chart-legend {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.chart-legend-item {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.9rem;
}

.chart-legend-color {
    width: 20px;
    height: 3px;
}