/* === Reset & Base === */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --color-bg: #f5f6fa;
    --color-surface: #ffffff;
    --color-primary: #4f46e5;
    --color-primary-dark: #4338ca;
    --color-text: #1e293b;
    --color-text-muted: #64748b;
    --color-border: #e2e8f0;
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-info: #3b82f6;
    --sidebar-width: 240px;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    font-size: 14px;
}

/* === App Layout === */
.app-layout {
    display: flex;
    min-height: 100vh;
}

/* === Sidebar === */
.sidebar {
    width: var(--sidebar-width);
    background: #1e293b;
    color: #e2e8f0;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
}

.sidebar-brand {
    padding: 20px;
    border-bottom: 1px solid #334155;
}

.sidebar-brand h2 {
    font-size: 18px;
    font-weight: 700;
    color: #ffffff;
}

.sidebar-nav {
    flex: 1;
    padding: 12px 0;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    color: #94a3b8;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.15s;
}

.sidebar-nav a:hover {
    color: #ffffff;
    background: #334155;
}

.sidebar-nav a.active {
    color: #ffffff;
    background: var(--color-primary);
}

.nav-icon {
    font-size: 14px;
    width: 20px;
    text-align: center;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid #334155;
    font-size: 13px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* === Main Content === */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 0;
}

.content-header {
    background: var(--color-surface);
    padding: 20px 32px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow);
}

.content-header h1 {
    font-size: 22px;
    font-weight: 600;
}

.content-body {
    padding: 24px 32px;
}

/* === Cards === */
.card {
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    border: 1px solid var(--color-border);
}

.card h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--color-text);
}

.card-link {
    display: inline-block;
    margin-top: 12px;
    color: var(--color-primary);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
}

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

/* === Dashboard Grid === */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
}

/* === Metrics === */
.metric-summary {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.metric-item {
    display: flex;
    flex-direction: column;
}

.metric-label {
    font-size: 12px;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.info-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-border);
    color: var(--color-text-muted);
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    margin-left: 4px;
    vertical-align: middle;
    position: relative;
}

.info-btn:hover {
    background: var(--color-primary);
    color: #fff;
}

.info-tooltip {
    display: none;
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-text);
    color: #fff;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 400;
    text-transform: none;
    letter-spacing: 0;
    white-space: normal;
    width: 220px;
    text-align: left;
    z-index: 100;
    box-shadow: var(--shadow-md);
    line-height: 1.4;
}

.info-btn:hover .info-tooltip {
    display: block;
}

.metric-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-text);
}

.metric-card {
    min-height: 200px;
}

/* === Performance Levels === */
.level-elite { color: var(--color-success); }
.level-high { color: var(--color-info); }
.level-medium { color: var(--color-warning); }
.level-low { color: var(--color-danger); }

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-elite { background: #dcfce7; color: #166534; }
.badge-high { background: #dbeafe; color: #1e40af; }
.badge-medium { background: #fef3c7; color: #92400e; }
.badge-low { background: #fee2e2; color: #991b1b; }

/* === Activity Feed === */
.activity-feed {
    max-height: 300px;
    overflow-y: auto;
}

.activity-item {
    padding: 8px 0;
    border-bottom: 1px solid var(--color-border);
    font-size: 13px;
}

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

.empty-state {
    color: var(--color-text-muted);
    text-align: center;
    padding: 32px 16px;
    font-size: 14px;
}

/* === Forms === */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 4px;
    font-weight: 500;
    font-size: 13px;
    color: var(--color-text);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 14px;
    background: var(--color-surface);
    color: var(--color-text);
    transition: border-color 0.15s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-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: 16px;
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s;
}

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

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

.btn-secondary {
    background: #e2e8f0;
    color: var(--color-text);
}

.btn-secondary:hover {
    background: #cbd5e1;
}

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

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

.btn-sm {
    padding: 4px 10px;
    font-size: 12px;
}

.btn-full {
    width: 100%;
    justify-content: center;
}

.btn-link {
    background: none;
    border: none;
    color: #94a3b8;
    cursor: pointer;
    font-size: 13px;
    text-decoration: underline;
}

.btn-link:hover {
    color: #ffffff;
}

/* === Alerts === */
.alert {
    padding: 10px 14px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 13px;
}

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

.alert-success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

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

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

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

.data-table th,
.data-table td {
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.data-table th {
    background: #f8fafc;
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-text-muted);
}

.data-table tr:hover {
    background: #f8fafc;
}

/* === Login Page === */
.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-card {
    background: var(--color-surface);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    text-align: center;
}

.login-card h1 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 4px;
}

.login-subtitle {
    color: var(--color-text-muted);
    margin-bottom: 24px;
}

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

/* === Chart Container === */
.chart-container {
    position: relative;
    width: 100%;
    height: 300px;
}

.chart-container-sm {
    height: 200px;
}

/* === Filters === */
.filter-bar {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.filter-bar select,
.filter-bar input {
    padding: 6px 12px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 13px;
    background: var(--color-surface);
}

/* === Tabs === */
.tabs {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--color-border);
    margin-bottom: 20px;
}

.tab {
    padding: 8px 16px;
    cursor: pointer;
    font-size: 14px;
    color: var(--color-text-muted);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    text-decoration: none;
    transition: all 0.15s;
}

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

.tab.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
    font-weight: 500;
}

/* === Gauge === */
.gauge-container {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.gauge-value {
    font-size: 48px;
    font-weight: 700;
}

.gauge-label {
    font-size: 14px;
    color: var(--color-text-muted);
}

/* === Survey === */
.survey-card {
    padding: 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin-bottom: 12px;
    background: var(--color-surface);
}

.survey-status {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
}

.status-active { background: #dcfce7; color: #166534; }
.status-draft { background: #f1f5f9; color: #475569; }
.status-closed { background: #fee2e2; color: #991b1b; }

/* === Hamburger Button === */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    width: 36px;
    height: 36px;
    padding: 6px;
    border: none;
    background: none;
    cursor: pointer;
    border-radius: 6px;
    flex-shrink: 0;
}

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

.hamburger span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--color-text);
    border-radius: 1px;
    transition: transform 0.2s, opacity 0.2s;
}

/* === Sidebar Overlay === */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 99;
}

/* === Searchable Dropdown === */
.search-select {
    position: relative;
    display: inline-block;
    min-width: 180px;
}

.search-select-trigger {
    padding: 6px 12px;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 13px;
    background: var(--color-surface);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    white-space: nowrap;
}

.search-select-trigger:after {
    content: '\25BE';
    font-size: 10px;
    color: var(--color-text-muted);
}

.search-select-dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    box-shadow: var(--shadow-md);
    z-index: 200;
    margin-top: 4px;
    max-height: 300px;
    overflow: hidden;
}

.search-select-dropdown.open {
    display: block;
}

.search-select-search {
    padding: 8px;
    border-bottom: 1px solid var(--color-border);
}

.search-select-search input {
    width: 100%;
    padding: 6px 8px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 13px;
    outline: none;
}

.search-select-search input:focus {
    border-color: var(--color-primary);
}

.search-select-options {
    max-height: 240px;
    overflow-y: auto;
}

.search-select-option {
    padding: 8px 12px;
    cursor: pointer;
    font-size: 13px;
}

.search-select-option:hover {
    background: var(--color-bg);
}

.search-select-option.selected {
    background: var(--color-primary);
    color: #fff;
}

/* === Responsive === */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-overlay.open {
        display: block;
    }

    .main-content {
        margin-left: 0;
    }

    .content-header {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 16px;
    }

    .content-header h1 {
        font-size: 18px;
    }

    .content-body {
        padding: 16px;
    }

    .dashboard-grid {
        grid-template-columns: 1fr;
    }

    .metric-summary {
        grid-template-columns: 1fr;
    }

    .filter-bar {
        flex-wrap: wrap;
    }

    .card {
        padding: 16px;
    }

    .gauge-value {
        font-size: 36px;
    }

    .data-table th,
    .data-table td {
        padding: 8px 10px;
        font-size: 13px;
    }

    .tabs {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .tab {
        white-space: nowrap;
        padding: 8px 12px;
        font-size: 13px;
    }
}