:root {
    /* Fresh Color Palette - Orange & Teal Theme */
    --primary-color: #f97316;
    --primary-light: #fb923c;
    --primary-dark: #ea580c;
    --success-color: #14b8a6;
    --success-light: #2dd4bf;
    --danger-color: #ef4444;
    --danger-light: #f87171;
    --warning-color: #f59e0b;
    --info-color: #06b6d4;
    --accent-color: #8b5cf6;

    /* Dark Theme */
    --bg-primary: #0a0e1a;
    --bg-secondary: #151b2e;
    --bg-tertiary: #1f2937;
    --bg-card: rgba(21, 27, 46, 0.85);
    --bg-hover: rgba(31, 41, 55, 0.6);

    /* Text Colors */
    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-muted: #9ca3af;

    /* Border & Shadow */
    --border-color: rgba(156, 163, 175, 0.15);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 3px 6px -2px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 16px -4px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(249, 115, 22, 0.3);
    --shadow-glow-teal: 0 0 20px rgba(20, 184, 166, 0.3);

    /* Compact Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 0.75rem;
    --spacing-lg: 1rem;
    --spacing-xl: 1.25rem;
    --spacing-2xl: 1.5rem;

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: #050811;
    /* Even darker, more premium background */
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    overflow-x: hidden;
    font-size: 14px;
}

/* Optimized Background */
body {
    background: radial-gradient(circle at top right, #0a0e1a, #050811);
    background-attachment: fixed;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Sync Status Styles */
.sync-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50px;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.sync-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #64748b;
    /* Gray for local */
}

.sync-indicator.online {
    background: #22c55e;
    box-shadow: 0 0 8px rgba(34, 197, 94, 0.5);
}

.sync-indicator.syncing {
    background: var(--primary-color);
    animation: pulseSync 1s infinite alternate;
}

.sync-indicator.error {
    background: #ef4444;
}

@keyframes pulseSync {
    from {
        opacity: 0.4;
    }

    to {
        opacity: 1;
        transform: scale(1.2);
    }
}

#syncBtn svg {
    transition: transform 0.3s ease;
}

#syncBtn.syncing svg {
    animation: rotateSync 1s infinite linear;
}

@keyframes rotateSync {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

/* Header */
.header {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-md);
    transition: background-color 0.3s ease;
}

.header.scrolled {
    background: rgba(10, 14, 26, 0.95);
    backdrop-filter: blur(10px);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 15px rgba(249, 115, 22, 0.4);
}

.logo-icon svg {
    width: 18px;
    height: 18px;
    stroke-width: 2.5;
}

.logo-text h1 {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
}

.logo-subtitle {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: -2px;
}

.header-actions {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
    flex-wrap: nowrap;
}

.btn-demo {
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-weight: 600;
    font-size: 0.75rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: all var(--transition-base);
    box-shadow: 0 3px 10px rgba(249, 115, 22, 0.3);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.btn-demo:hover {
    transform: translateY(-1px);
    box-shadow: 0 5px 15px rgba(249, 115, 22, 0.5);
}

.btn-demo svg {
    width: 14px;
    height: 14px;
    stroke-width: 2.5;
}

.btn-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-icon:hover {
    background: var(--bg-hover);
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-icon svg {
    width: 16px;
    height: 16px;
    stroke-width: 2;
}

/* Main Content */
.main-content {
    padding: var(--spacing-lg) 0;
}

/* Opening Balance Card */
.opening-balance-card {
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, rgba(249, 115, 22, 0.15), rgba(20, 184, 166, 0.15));
    border: 1px solid rgba(249, 115, 22, 0.2);
}

.opening-balance-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.opening-balance-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.opening-balance-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.opening-balance-input-group {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.opening-balance-input-group input {
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1.125rem;
    font-weight: 600;
    width: 200px;
    transition: all var(--transition-base);
}

.opening-balance-input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.btn-sm {
    padding: 0.75rem 1.25rem;
    font-size: 0.875rem;
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    gap: var(--spacing-md);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, currentColor, transparent);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.stat-card:hover::before {
    opacity: 1;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stat-card-primary {
    color: var(--primary-color);
}

.stat-card-success {
    color: var(--success-color);
}

.stat-card-danger {
    color: var(--danger-color);
}

.stat-card-info {
    color: var(--info-color);
}

.stat-icon {
    width: 60px;
    height: 60px;
    background: currentColor;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.15;
    flex-shrink: 0;
}

.stat-icon svg {
    width: 30px;
    height: 30px;
    stroke: var(--text-primary);
    opacity: 1;
}

.stat-details {
    flex: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-value {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
}

.stat-note {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

/* Card Styles */
.card {
    background: rgba(21, 27, 46, 0.4);
    /* Less opaque for better performance */
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
    border-color: rgba(249, 115, 22, 0.3);
}

.card-header {
    margin-bottom: var(--spacing-md);
}

.card-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.card-subtitle {
    color: var(--text-muted);
    font-size: 0.75rem;
}

/* Form Styles */
.transaction-form {
    width: 100%;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: all var(--transition-base);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 60px;
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: all var(--transition-base);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.btn svg {
    width: 20px;
    height: 20px;
    stroke-width: 2;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

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

.btn-danger {
    background: linear-gradient(135deg, #ef4444, #991b1b);
    color: white;
    box-shadow: 0 4px 14px rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(239, 68, 68, 0.5);
}

/* Filters */
.filters-card {
    padding: var(--spacing-lg);
}

.filters-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.filters-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
}

.filter-controls {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.search-box {
    position: relative;
    flex: 1;
    min-width: 250px;
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    color: var(--text-muted);
    pointer-events: none;
}

.search-box input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 3rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    transition: all var(--transition-base);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.filter-select {
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-base);
    min-width: 150px;
}

.filter-select:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Table */
.table-card {
    padding: 0;
    overflow: hidden;
}

.table-container {
    overflow-x: auto;
}

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

.transactions-table thead {
    background: var(--bg-tertiary);
    border-bottom: 2px solid var(--border-color);
}

.transactions-table th {
    padding: 1rem 1.5rem;
    text-align: left;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.transactions-table th.text-right {
    text-align: right;
}

.transactions-table th.text-center {
    text-align: center;
}

.transactions-table tbody tr {
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

.transactions-table tbody tr:hover {
    background: var(--bg-hover);
}

.transactions-table td {
    padding: 1rem 1.5rem;
    color: var(--text-primary);
}

.transactions-table td.text-right {
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.transactions-table td.text-center {
    text-align: center;
}

.amount-debit {
    color: var(--danger-color);
    font-weight: 600;
}

.amount-credit {
    color: var(--success-color);
    font-weight: 600;
}

.amount-balance {
    font-weight: 700;
}

.btn-delete {
    padding: 0.5rem 1rem;
    background: transparent;
    border: 1px solid var(--danger-color);
    color: var(--danger-color);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-base);
}

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

/* Empty State */
.empty-state {
    background: transparent !important;
}

.empty-state-content {
    padding: var(--spacing-xl) 0;
    text-align: center;
    color: var(--text-muted);
}

.empty-state-content svg {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    opacity: 0.3;
    stroke-width: 1.5;
}

.empty-state-content p {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.empty-state-content span {
    font-size: 0.875rem;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(5, 8, 17, 0.9);
    /* Darker backdrop */
    backdrop-filter: blur(8px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal.active {
    display: flex;
    animation: fadeIn var(--transition-base);
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    /* Don't exceed screen height */
    overflow: hidden;
    /* Body will handle scroll */
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    animation: slideUp var(--transition-slow);
}

.modal-body {
    padding: var(--spacing-xl);
    overflow-y: auto;
    /* Internal scroll */
    flex: 1;
}

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
}

.modal-body {
    padding: var(--spacing-xl);
}

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

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .dashboard-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }

    .form-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
}

/* Selection and Pagination Styles */
.row-selected {
    background-color: rgba(249, 115, 22, 0.05) !important;
}

.transaction-checkbox {
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.btn-danger {
    background: linear-gradient(135deg, #ef4444, #b91c1c) !important;
    color: white !important;
    display: flex !important;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border: none;
    transition: all 0.2s ease;
}

.btn-danger:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.load-more-container {
    background: rgba(255, 255, 255, 0.02);
}

#loadMoreBtn {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

#loadMoreBtn:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(249, 115, 22, 0.4);
}

/* Animations for new rows */
@keyframes fadeInRow {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.transaction-row {
    animation: fadeInRow 0.3s ease-out forwards;
}

/* Tablet and Mobile adjustments */
@media (max-width: 768px) {
    body {
        font-size: 13px;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    .header {
        padding: var(--spacing-xs) 0;
    }

    .header-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }

    .logo-text {
        display: none;
    }

    .header-actions {
        gap: 4px;
    }

    .btn-demo span {
        display: none;
    }

    .btn-demo,
    .btn-logout {
        padding: 0.5rem;
        width: 36px;
        height: 36px;
        justify-content: center;
        display: flex;
        align-items: center;
    }

    .btn-logout svg {
        width: 18px;
        height: 18px;
    }

    .btn-logout span {
        display: none;
    }

    .sync-text {
        display: none;
    }

    .sync-status {
        padding: 0.25rem 0.4rem;
    }

    .dashboard-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .stat-card {
        padding: var(--spacing-sm);
    }

    .stat-value {
        font-size: 1.5rem;
    }

    .transactions-table thead {
        display: none;
    }

    .transactions-table,
    .transactions-table tbody,
    .transactions-table tr,
    .transactions-table td {
        display: block;
        width: 100%;
    }

    .transactions-table tr {
        margin-bottom: 1.25rem;
        background: rgba(21, 27, 46, 0.6);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-xl);
        padding: 1.25rem;
        position: relative;
        box-shadow: var(--shadow-md);
    }

    .transactions-table td {
        padding: 0.5rem 0;
        text-align: left !important;
        border: none;
        display: flex;
        justify-content: space-between;
        align-items: flex-start;
        gap: 1rem;
        border-bottom: 1px solid rgba(156, 163, 175, 0.05);
    }

    .transactions-table td::before {
        content: attr(data-label);
        font-weight: 700;
        color: var(--text-muted);
        font-size: 0.65rem;
        text-transform: uppercase;
        flex-shrink: 0;
        width: 100px;
    }

    .transactions-table td:last-child {
        margin-top: 0.75rem;
        border-top: 1px solid var(--border-color);
        padding-top: 1rem;
        justify-content: center;
        border-bottom: none;
    }

    .transactions-table td:last-child::before {
        display: none;
    }

    .transactions-table td[style] {
        width: 100% !important;
    }

    .date-group-info {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .date-group-summary {
        width: 100%;
        justify-content: space-between;
    }
}

@media (max-width: 480px) {
    .opening-balance-header {
        flex-direction: column;
        align-items: stretch;
    }

    .opening-balance-input-group {
        width: 100%;
    }

    .opening-balance-input-group input {
        flex: 1;
        width: auto;
    }

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

    .logo-icon {
        width: 32px;
        height: 32px;
    }
}