:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;
    --border-color: #334155;
    --border-subtle: #1e293b;
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --accent-primary: #38bdf8;
    --accent-hover: #0284c7;
    --accent-subtle: rgba(56, 189, 248, 0.12);
    
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.15);
    --success-text: #34d399;
    --success-border: rgba(16, 185, 129, 0.3);
    
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.15);
    --warning-text: #fbbf24;
    --warning-border: rgba(245, 158, 11, 0.3);
    
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.15);
    --danger-text: #f87171;
    --danger-border: rgba(239, 68, 68, 0.3);
    
    --pending-bg: rgba(100, 116, 139, 0.15);
    --pending-text: #94a3b8;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.25);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.25);
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-full: 9999px;
}

[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    --border-color: #e2e8f0;
    --border-subtle: #f1f5f9;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --accent-primary: #0284c7;
    --accent-hover: #0369a1;
    --accent-subtle: rgba(2, 132, 199, 0.1);
    
    --success: #059669;
    --success-bg: rgba(16, 185, 129, 0.12);
    --success-text: #059669;
    --success-border: rgba(16, 185, 129, 0.25);
    
    --warning: #d97706;
    --warning-bg: rgba(245, 158, 11, 0.12);
    --warning-text: #d97706;
    --warning-border: rgba(245, 158, 11, 0.25);
    
    --danger: #dc2626;
    --danger-bg: rgba(239, 68, 68, 0.12);
    --danger-text: #dc2626;
    --danger-border: rgba(239, 68, 68, 0.25);
    
    --pending-bg: rgba(148, 163, 184, 0.15);
    --pending-text: #64748b;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color 0.2s ease, color 0.2s ease;
}

/* NAVBAR */
.navbar {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 40;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0.85rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-primary);
}

.brand-icon {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, #0284c7, #38bdf8);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.15rem;
    box-shadow: 0 2px 8px rgba(56, 189, 248, 0.4);
}

.brand-title {
    font-weight: 700;
    font-size: 1.15rem;
    letter-spacing: -0.01em;
}

.brand-badge {
    font-size: 0.7rem;
    background: var(--accent-subtle);
    color: var(--accent-primary);
    padding: 0.15rem 0.5rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    margin-left: 0.25rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    list-style: none;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 0.85rem;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.15s ease;
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.nav-link.active {
    color: var(--accent-primary);
    background: var(--accent-subtle);
    font-weight: 600;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* BUTTONS */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    padding: 0.55rem 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.15s ease;
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--accent-primary);
    color: #ffffff;
    box-shadow: 0 2px 6px rgba(2, 132, 199, 0.35);
}

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

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-color);
}

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

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

.btn-outline {
    background: transparent;
    color: var(--text-secondary);
    border-color: var(--border-color);
}

.btn-outline:hover {
    color: var(--text-primary);
    border-color: var(--text-secondary);
    background: var(--bg-tertiary);
}

.btn-sm {
    padding: 0.35rem 0.65rem;
    font-size: 0.8rem;
    border-radius: var(--radius-sm);
}

.btn-icon {
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    background: transparent;
    border: 1px solid transparent;
    cursor: pointer;
}

.btn-icon:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

/* STATUS BADGE */
.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.65rem;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    text-align: center;
}

.status-online {
    background: var(--success-bg);
    color: var(--success-text);
    border: 1px solid var(--success-border);
}

.status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: currentColor;
    display: inline-block;
}

.status-pill.on-target {
    background: var(--success-bg);
    color: var(--success-text);
    border: 1px solid var(--success-border);
}

.status-pill.warning {
    background: var(--warning-bg);
    color: var(--warning-text);
    border: 1px solid var(--warning-border);
}

.status-pill.below-target {
    background: var(--danger-bg);
    color: var(--danger-text);
    border: 1px solid var(--danger-border);
}

.status-pill.pending {
    background: var(--pending-bg);
    color: var(--pending-text);
    border: 1px solid transparent;
}

/* MAIN LAYOUT */
.main-content {
    flex: 1;
    max-width: 1440px;
    width: 100%;
    margin: 0 auto;
    padding: 1.5rem;
}

/* HEADER BAR */
.page-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.75rem;
}

.page-title h1 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.page-title p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: 0.2rem;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.select-year {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 0.85rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
}

/* KPI CARDS GRID */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.75rem;
}

.kpi-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.kpi-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.kpi-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.6rem;
}

.kpi-label {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-secondary);
}

.kpi-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-primary);
}

.kpi-value-row {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.kpi-value {
    font-size: 2.15rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--text-primary);
}

.kpi-value.highlight-green {
    color: var(--success-text);
}

.kpi-value.highlight-amber {
    color: var(--warning-text);
}

.kpi-value.highlight-red {
    color: var(--danger-text);
}

.kpi-target-tag {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.kpi-footer {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.825rem;
    color: var(--text-secondary);
}

/* SECTION CARDS */
.dashboard-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.75rem;
    overflow: hidden;
}

.section-header {
    padding: 1.15rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.section-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.section-subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-top: 0.15rem;
}

.section-body {
    padding: 1.5rem;
}

/* CHART CONTAINER */
.chart-wrapper {
    position: relative;
    width: 100%;
    height: 320px;
}

/* MATRIX TABLE (12 Months x Weeks) */
.matrix-container {
    overflow-x: auto;
}

.matrix-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
    text-align: left;
}

.matrix-table th {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    font-weight: 600;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

.matrix-table td {
    padding: 0.8rem 1rem;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

.matrix-table tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

[data-theme="light"] .matrix-table tr:hover td {
    background: rgba(0, 0, 0, 0.015);
}

.month-cell {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.month-cell:hover {
    color: var(--accent-primary);
}

/* CLICKABLE WEEK PILL */
.week-pill-cell {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 0.2rem;
    min-width: 68px;
    padding: 0.35rem 0.5rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    cursor: pointer;
    transition: all 0.15s ease;
    border: 1px solid transparent;
}

.week-pill-cell:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-sm);
    border-color: var(--border-color);
}

.week-label {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted);
}

.week-val {
    font-size: 0.85rem;
    font-weight: 700;
}

/* PROGRESS BAR */
.progress-container {
    width: 100%;
    height: 7px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
    position: relative;
}

.progress-bar {
    height: 100%;
    border-radius: var(--radius-full);
    transition: width 0.4s ease;
}

.progress-bar.success {
    background: var(--success);
}

.progress-bar.warning {
    background: var(--warning);
}

.progress-bar.danger {
    background: var(--danger);
}

/* PEOPLE PERFORMANCE TABLE */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.data-table th {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    font-weight: 600;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
    text-align: left;
}

.data-table th.num-col,
.data-table td.num-col {
    text-align: right;
}

.data-table td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.data-table tr.totals-row {
    font-weight: 700;
    background: var(--bg-tertiary);
}

.data-table tr.totals-row td {
    border-top: 2px solid var(--border-color);
    color: var(--text-primary);
}

.person-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
}

.person-link:hover {
    color: var(--accent-primary);
    text-decoration: underline;
}

/* MODAL & DRAWER */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 100;
    padding: 1.5rem;
}

.modal-overlay.active {
    display: flex;
}

.modal-container {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 820px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: modalIn 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: translateY(12px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.75rem;
    background: var(--bg-secondary);
}

/* TOAST NOTIFICATION */
.toast-container {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 110;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    pointer-events: none;
}

.toast {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.85rem 1.25rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.9rem;
    font-weight: 500;
    pointer-events: auto;
    animation: toastIn 0.25s ease;
}

@keyframes toastIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.toast.toast-success {
    border-left: 4px solid var(--success);
}

.toast.toast-error {
    border-left: 4px solid var(--danger);
}

/* SPINNER */
.spinner {
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-top: 2px solid currentColor;
    border-radius: 50%;
    width: 14px;
    height: 14px;
    animation: spin 0.7s linear infinite;
    display: inline-block;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* FOOTER */
.app-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 1.25rem 1.5rem;
    margin-top: auto;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}