:root {
    --bg-dark: #070f2b; /* Midnight Blue */
    --bg-panel: #1b1a55;
    --bg-panel-hover: #2d2b6b;
    --bg-lighter: #535c91;
    --primary: #9290c3;
    --primary-hover: #a5a3d4;
    --accent: #00d2ff;
    --text-primary: #ffffff;
    --text-secondary: #c2c9d6;
    
    --glass-bg: rgba(27, 26, 85, 0.6);
    --glass-border: rgba(146, 144, 195, 0.2);
    
    --danger: #ef4444;
    --success: #10b981;
    --warning: #f59e0b;

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    --transition: 0.25s ease;
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    background-image: 
        radial-gradient(ellipse at top right, rgba(0, 210, 255, 0.05), transparent 40%),
        radial-gradient(ellipse at bottom left, rgba(146, 144, 195, 0.1), transparent 40%);
    min-height: 100vh;
    display: flex;
}

/* Utilities */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
}

.hidden { display: none !important; }
.mt-6 { margin-top: 1.5rem; }
.mb-4 { margin-bottom: 1rem; }
.w-full { width: 100%; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.align-end { align-items: flex-end; }

/* Layout */
.app-container {
    display: flex;
    width: 100%;
    height: 100vh;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: 260px;
    height: 100%;
    display: flex;
    flex-direction: column;
    border-radius: 0;
    border-top: none;
    border-left: none;
    border-bottom: none;
}

.sidebar-header {
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--glass-border);
}

.logo-icon {
    color: var(--accent);
}

.app-title {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.sidebar-nav {
    flex: 1;
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    font-weight: 500;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.nav-item.active {
    background: var(--primary);
    color: var(--bg-dark);
}

.sidebar-footer {
    padding: 24px;
    border-top: 1px solid var(--glass-border);
}

.earnings-summary {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.earnings-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.earnings-amount {
    font-size: 1.75rem;
    color: var(--accent);
    font-weight: 700;
}

/* Main Content */
.main-content {
    flex: 1;
    height: 100%;
    overflow-y: auto;
    padding: 40px;
}

.view-section {
    display: none;
    max-width: 1200px;
    margin: 0 auto;
    animation: fadeIn 0.3s ease;
}

.view-section.active {
    display: block;
}

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

.view-header {
    margin-bottom: 32px;
}

.view-header h2 {
    font-size: 2rem;
    font-weight: 600;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
}

.btn-large {
    padding: 14px 28px;
    font-size: 1.1rem;
}

.btn-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}
.btn-danger:hover {
    background: var(--danger);
    color: white;
}

.btn-icon {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: var(--transition);
}
.btn-icon:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
}

/* Forms */
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.span-full {
    grid-column: 1 / -1;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(0, 0, 0, 0.4);
}

.form-input::placeholder {
    color: rgba(255, 255, 255, 0.3);
}

/* Tracker Dashboard */
.tracker-dashboard {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    align-items: start;
}

.timer-widget {
    padding: 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.timer-display h1 {
    font-size: 4.5rem;
    font-variant-numeric: tabular-nums;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 2px;
}

.timer-controls {
    display: flex;
    gap: 16px;
    width: 100%;
}

.timer-details {
    width: 100%;
}

.manual-entry-widget {
    padding: 32px;
}

.manual-entry-widget h3 {
    margin-bottom: 24px;
    font-size: 1.25rem;
}

/* Tables */
.section-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--glass-border);
}

.table-container {
    width: 100%;
    overflow-x: auto;
}

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

.data-table th,
.data-table td {
    padding: 16px 24px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.data-table th {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
    font-weight: 600;
}

.data-table tbody tr {
    transition: var(--transition);
}

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

.empty-state {
    padding: 48px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    color: var(--text-secondary);
    text-align: center;
}

.empty-state svg {
    width: 48px;
    height: 48px;
    opacity: 0.5;
}

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.project-card {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    transition: var(--transition);
    position: relative;
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.project-client {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.project-name {
    font-size: 1.25rem;
    font-weight: 600;
}

.project-rate {
    background: rgba(0, 210, 255, 0.1);
    color: var(--accent);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 600;
}

.project-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--glass-border);
}

.stat-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-val {
    font-size: 1.1rem;
    font-weight: 600;
}

.project-actions {
    position: absolute;
    top: 16px;
    right: 16px;
    opacity: 0;
    transition: var(--transition);
}

.project-card:hover .project-actions {
    opacity: 1;
}

/* Reports */
.report-actions {
    display: flex;
    gap: 16px;
}

.report-summary-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.summary-card {
    padding: 24px;
    text-align: center;
}

.summary-card h4 {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.summary-card h2 {
    font-size: 2.5rem;
    color: var(--accent);
}

/* Invoice Generator */
.invoice-generator {
    padding: 32px;
    max-width: 800px;
}

.invoice-preview {
    padding: 40px;
    background: #ffffff; /* White background for preview/print */
    color: #1a1a1a;
    border-radius: var(--radius-md);
    max-width: 800px;
}

.invoice-print {
    font-family: 'Inter', sans-serif;
}

.invoice-print-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 2px solid #e5e7eb;
}

.invoice-print-header h1 {
    font-size: 2rem;
    color: #111827;
    margin-bottom: 8px;
}

.invoice-print-meta {
    text-align: right;
    color: #4b5563;
}

.invoice-print-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 40px;
}

.invoice-print-table th, 
.invoice-print-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #e5e7eb;
}

.invoice-print-table th {
    background: #f9fafb;
    font-weight: 600;
    color: #374151;
}

.invoice-print-table .text-right {
    text-align: right;
}

.invoice-print-total {
    display: flex;
    justify-content: flex-end;
}

.invoice-print-total-inner {
    width: 300px;
}

.invoice-print-total-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    font-size: 1.1rem;
}

.invoice-print-total-row.grand-total {
    font-size: 1.5rem;
    font-weight: 700;
    border-top: 2px solid #111827;
    margin-top: 8px;
    padding-top: 16px;
}

/* Modals */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: var(--bg-panel);
    width: 100%;
    max-width: 500px;
    padding: 32px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 16px;
    margin-top: 32px;
}

/* Print Styles */
@media print {
    body * {
        visibility: hidden;
    }
    #invoice-preview-content, #invoice-preview-content * {
        visibility: visible;
    }
    #invoice-preview-content {
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        background: white;
        padding: 0;
    }
}