/* ==========================================================================
   SubHub Pro - Enterprise Modern Design System & Responsive Framework
   Aesthetics: Clean, Ultra-Professional, High-Contrast, SaaS-grade UI
   ========================================================================== */

/* 1. Global Reset & Variables */
:root {
    --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    
    /* Primary Colors - Modern Indigo */
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-active: #3730a3;
    --primary-light: #eef2ff;
    --primary-subtle: rgba(79, 70, 229, 0.08);
    --primary-border: #c7d2fe;
    
    /* Accent & Functional */
    --success: #059669;
    --success-light: #ecfdf5;
    --success-border: #a7f3d0;
    --warning: #d97706;
    --warning-light: #fffbeb;
    --warning-border: #fde68a;
    --danger: #dc2626;
    --danger-light: #fef2f2;
    --danger-border: #fecaca;
    --info: #0284c7;
    --info-light: #f0f9ff;
    --info-border: #bae6fd;
    --wa-green: #25d366;
    --wa-hover: #1ebd5a;

    /* Light Theme (Clean Crisp Minimalist) */
    --bg-body: #f8fafc;
    --bg-surface: #ffffff;
    --bg-surface-secondary: #f1f5f9;
    --bg-sidebar: #0f172a;
    --sidebar-text: #94a3b8;
    --sidebar-text-active: #ffffff;
    --sidebar-hover: rgba(255, 255, 255, 0.06);
    --sidebar-active-bg: #4f46e5;

    /* Typography Colors */
    --text-main: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;
    --text-subtle: #94a3b8;

    /* Borders & Dividers */
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    --border-subtle: #f8fafc;

    /* Elevation Shadows */
    --shadow-xs: 0 1px 2px 0 rgba(15, 23, 42, 0.04);
    --shadow-sm: 0 1px 3px 0 rgba(15, 23, 42, 0.08), 0 1px 2px -1px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.05);

    /* Radii */
    --radius-xs: 4px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* Layout Dimensions */
    --sidebar-width: 260px;
    --topbar-height: 68px;
}

/* Dark Theme (High Precision Slate Dark) */
[data-theme="dark"] {
    --bg-body: #090d16;
    --bg-surface: #111827;
    --bg-surface-secondary: #1e293b;
    --bg-sidebar: #090d16;
    
    --text-main: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --text-subtle: #64748b;

    --border-color: #1f2937;
    --border-light: #1e293b;
    --border-subtle: #141e33;

    --primary-light: rgba(79, 70, 229, 0.15);
    --primary-border: rgba(99, 102, 241, 0.3);

    --success-light: rgba(5, 150, 105, 0.15);
    --success-border: rgba(5, 150, 105, 0.3);

    --warning-light: rgba(217, 119, 6, 0.15);
    --warning-border: rgba(217, 119, 6, 0.3);

    --danger-light: rgba(220, 38, 38, 0.15);
    --danger-border: rgba(220, 38, 38, 0.3);

    --info-light: rgba(2, 132, 199, 0.15);
    --info-border: rgba(2, 132, 199, 0.3);

    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.6);
}

/* 2. Base CSS Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 14.5px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.5;
    overflow-x: hidden;
    transition: background-color 0.2s ease, color 0.2s ease;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.15s ease;
}

a:hover {
    color: var(--primary-hover);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* 3. Layout Structure */
.app-wrapper {
    display: flex;
    min-height: 100vh;
    width: 100%;
    position: relative;
}

/* 4. Sidebar Styles */
.app-sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-sidebar);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    border-right: 1px solid rgba(255, 255, 255, 0.05);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.15);
}

.sidebar-brand {
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    gap: 0.85rem;
    padding: 0 1.25rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.brand-icon {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.2rem;
    box-shadow: 0 2px 8px rgba(79, 70, 229, 0.35);
    flex-shrink: 0;
}

.brand-text {
    font-weight: 800;
    font-size: 1.05rem;
    color: #fff;
    letter-spacing: -0.3px;
}

.brand-badge {
    font-size: 0.65rem;
    color: #818cf8;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    font-weight: 700;
}

.sidebar-menu {
    flex: 1;
    overflow-y: auto;
    padding: 1.25rem 0.85rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.sidebar-menu::-webkit-scrollbar {
    width: 4px;
}
.sidebar-menu::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

.menu-category {
    font-size: 0.68rem;
    font-weight: 800;
    color: #475569;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    padding: 0.85rem 0.6rem 0.35rem 0.6rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 0.85rem;
    border-radius: var(--radius-sm);
    color: var(--sidebar-text);
    font-weight: 500;
    font-size: 0.88rem;
    transition: all 0.15s ease;
    text-decoration: none;
    position: relative;
}

.nav-link i {
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
    color: #64748b;
    transition: color 0.15s ease;
}

.nav-link:hover {
    background-color: var(--sidebar-hover);
    color: #ffffff;
}

.nav-link:hover i {
    color: #818cf8;
}

.nav-link.active {
    background-color: var(--sidebar-active-bg);
    color: #ffffff;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.35);
}

.nav-link.active i {
    color: #ffffff;
}

.nav-badge {
    margin-left: auto;
    padding: 2px 7px;
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    font-weight: 700;
}

.badge-danger {
    background-color: #ef4444;
    color: #fff;
}

.badge-warning {
    background-color: #f59e0b;
    color: #fff;
}

.sidebar-footer {
    padding: 1rem 1.25rem;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    background: rgba(0, 0, 0, 0.2);
}

/* 5. Main Content Layout */
.app-main {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 100vh;
}

.app-topbar {
    height: var(--topbar-height);
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.75rem;
    position: sticky;
    top: 0;
    z-index: 90;
    backdrop-filter: blur(8px);
    background-color: rgba(255, 255, 255, 0.9);
}

[data-theme="dark"] .app-topbar {
    background-color: rgba(17, 24, 39, 0.9);
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.sidebar-toggle-btn {
    display: none;
    background: none;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    width: 36px;
    height: 36px;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--text-main);
    cursor: pointer;
    background-color: var(--bg-surface);
}

.page-title {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: -0.3px;
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

.page-content {
    padding: 1.75rem;
    flex: 1;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
}

/* 6. Typography & Cards */
.card-box {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
    margin-bottom: 1.5rem;
}

.card-box:hover {
    box-shadow: var(--shadow-md);
    border-color: rgba(79, 70, 229, 0.2);
}

.card-header-clean {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.card-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-main);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* 7. Metric Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.75rem;
}

.stat-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.35rem;
    display: flex;
    align-items: center;
    gap: 1.1rem;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.stat-icon-wrapper {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.icon-primary {
    background-color: var(--primary-light);
    color: var(--primary);
    border: 1px solid var(--primary-border);
}

.icon-success {
    background-color: var(--success-light);
    color: var(--success);
    border: 1px solid var(--success-border);
}

.icon-warning {
    background-color: var(--warning-light);
    color: var(--warning);
    border: 1px solid var(--warning-border);
}

.icon-danger {
    background-color: var(--danger-light);
    color: var(--danger);
    border: 1px solid var(--danger-border);
}

.stat-info {
    flex: 1;
    min-width: 0;
}

.stat-label {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.2rem;
}

.stat-value {
    font-size: 1.45rem;
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: -0.5px;
    line-height: 1.2;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.stat-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* 8. Table Styling */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: var(--radius-sm);
}

.table-custom {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.88rem;
}

.table-custom th {
    background-color: var(--border-subtle);
    color: var(--text-muted);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.72rem;
    letter-spacing: 0.6px;
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

.table-custom td {
    padding: 0.95rem 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    vertical-align: middle;
}

.table-custom tbody tr {
    transition: background-color 0.1s ease;
}

.table-custom tbody tr:hover {
    background-color: var(--primary-subtle);
}

.table-custom tbody tr:last-child td {
    border-bottom: none;
}

/* 9. Badges & Pills */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 3px 9px;
    border-radius: var(--radius-full);
    font-size: 0.72rem;
    font-weight: 700;
    white-space: nowrap;
}

.status-badge.badge-success {
    background-color: var(--success-light);
    color: var(--success);
    border: 1px solid var(--success-border);
}

.status-badge.badge-warning {
    background-color: var(--warning-light);
    color: var(--warning);
    border: 1px solid var(--warning-border);
}

.status-badge.badge-danger {
    background-color: var(--danger-light);
    color: var(--danger);
    border: 1px solid var(--danger-border);
}

.status-badge.badge-secondary {
    background-color: var(--border-subtle);
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}

.status-badge.badge-dark {
    background-color: var(--bg-sidebar);
    color: #fff;
}

.days-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 3px 9px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 700;
    white-space: nowrap;
}

.pill-danger {
    background-color: var(--danger-light);
    color: var(--danger);
    border: 1px solid var(--danger-border);
}

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

.pill-info {
    background-color: var(--info-light);
    color: var(--info);
    border: 1px solid var(--info-border);
}

.pill-success {
    background-color: var(--success-light);
    color: var(--success);
    border: 1px solid var(--success-border);
}

/* 10. Buttons & Controls */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    padding: 0.55rem 1.1rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.85rem;
    font-family: inherit;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.15s ease;
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--primary);
    color: #ffffff;
    box-shadow: 0 1px 3px rgba(79, 70, 229, 0.25);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    color: #ffffff;
    box-shadow: 0 4px 10px rgba(79, 70, 229, 0.35);
}

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

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

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

.btn-success:hover {
    background-color: #047857;
    color: #ffffff;
}

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

.btn-danger:hover {
    background-color: #b91c1c;
    color: #ffffff;
}

.btn-wa {
    background-color: var(--wa-green);
    color: #ffffff;
    font-weight: 700;
}

.btn-wa:hover {
    background-color: var(--wa-hover);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(37, 211, 102, 0.35);
}

.btn-sm {
    padding: 0.35rem 0.75rem;
    font-size: 0.78rem;
    border-radius: var(--radius-xs);
}

.btn-lg {
    padding: 0.75rem 1.4rem;
    font-size: 0.95rem;
    border-radius: var(--radius-md);
}

/* 11. Form Inputs */
.form-group {
    margin-bottom: 1.15rem;
}

.form-label {
    display: block;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 0.4rem;
}

.form-label .required {
    color: var(--danger);
}

.form-control, .form-select {
    width: 100%;
    padding: 0.6rem 0.85rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background-color: var(--bg-surface);
    color: var(--text-main);
    font-family: inherit;
    font-size: 0.88rem;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-control:focus, .form-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

textarea.form-control {
    min-height: 90px;
    resize: vertical;
}

.form-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.3rem;
}

/* 12. Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(6px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 580px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    transform: scale(0.95) translateY(10px);
    transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-overlay.active .modal-card {
    transform: scale(1) translateY(0);
}

.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    background-color: var(--bg-surface);
    z-index: 10;
}

.modal-title {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--text-main);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.1rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: var(--radius-xs);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    color: var(--text-main);
    background-color: var(--border-subtle);
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    background-color: var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.75rem;
    position: sticky;
    bottom: 0;
}

/* 13. Theme Switcher & Utility Buttons */
.theme-toggle-btn {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background-color: var(--bg-surface);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.1rem;
    transition: all 0.15s ease;
}

.theme-toggle-btn:hover {
    background-color: var(--border-subtle);
    border-color: var(--primary);
}

/* 14. Alert Boxes */
.alert-box {
    padding: 0.85rem 1.25rem;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border: 1px solid transparent;
}

.alert-success {
    background-color: var(--success-light);
    color: #065f46;
    border-color: var(--success-border);
}

.alert-danger {
    background-color: var(--danger-light);
    color: #991b1b;
    border-color: var(--danger-border);
}

.alert-warning {
    background-color: var(--warning-light);
    color: #92400e;
    border-color: var(--warning-border);
}

/* 15. Invoice Sheet Document Design */
.invoice-sheet {
    background-color: #ffffff;
    color: #0f172a;
    border-radius: var(--radius-md);
    padding: 2.5rem;
    border: 1px solid #e2e8f0;
    box-shadow: var(--shadow-lg);
    max-width: 860px;
    margin: 0 auto;
}

[data-theme="dark"] .invoice-sheet {
    background-color: #ffffff;
    color: #0f172a;
}

.invoice-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid #f1f5f9;
    margin-bottom: 1.5rem;
}

.invoice-meta {
    text-align: right;
}

.invoice-number-badge {
    font-family: monospace;
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--primary);
    background: #eef2ff;
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    display: inline-block;
}

.invoice-parties {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.party-title {
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
    color: #64748b;
    margin-bottom: 0.4rem;
}

.party-name {
    font-size: 1.1rem;
    font-weight: 800;
    color: #0f172a;
}

.party-desc {
    font-size: 0.85rem;
    color: #475569;
    line-height: 1.45;
    margin-top: 0.2rem;
}

.invoice-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 2rem;
}

.invoice-table th {
    background-color: #f8fafc;
    color: #475569;
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 700;
    padding: 0.75rem 1rem;
    border-bottom: 2px solid #e2e8f0;
}

.invoice-table td {
    padding: 0.95rem 1rem;
    border-bottom: 1px solid #f1f5f9;
    font-size: 0.88rem;
    color: #1e293b;
}

.invoice-totals {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 2rem;
}

.totals-table {
    width: 320px;
}

.totals-table td {
    padding: 0.45rem 0;
    font-size: 0.88rem;
    color: #475569;
}

.totals-table tr.grand-total td {
    border-top: 2px solid #e2e8f0;
    padding-top: 0.75rem;
    font-size: 1.2rem;
    font-weight: 800;
    color: #0f172a;
}

.invoice-payment-info {
    background-color: #f8fafc;
    border-radius: var(--radius-sm);
    padding: 1.25rem;
    border: 1px dashed #cbd5e1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

/* 16. Filter Bar */
.filter-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.search-input-box {
    position: relative;
    min-width: 240px;
}

.search-input-box i {
    position: absolute;
    left: 0.85rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-input-box input {
    padding-left: 2.3rem;
}

/* 17. Pulse Animation */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.animate-pulse {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* ==========================================================================
   18. Comprehensive Responsive Media Queries (Mobile, Tablet, Desktop)
   ========================================================================== */

/* Responsive Grids */
.grid-2-col {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.grid-1-1 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

.grid-1-1-1 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1.25rem;
}

/* Tablet & Mobile Screens (<= 1024px) */
@media (max-width: 1024px) {
    :root {
        --sidebar-width: 240px;
    }

    .grid-2-col {
        grid-template-columns: 1fr;
    }

    .app-sidebar {
        transform: translateX(-100%);
    }

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

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

    .sidebar-toggle-btn {
        display: flex;
    }

    .page-content {
        padding: 1.25rem;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .invoice-parties,
    .invoice-payment-info {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

/* Small Mobile Screens (<= 640px) */
@media (max-width: 640px) {
    html {
        font-size: 13.5px;
    }

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

    .app-topbar {
        padding: 0 1rem;
    }

    .page-content {
        padding: 1rem 0.85rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 0.85rem;
    }

    .stat-card {
        padding: 1rem;
    }

    .filter-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .search-input-box {
        width: 100%;
        min-width: unset;
    }

    .filter-bar > div:last-child {
        display: flex;
        flex-direction: column;
        width: 100%;
    }

    .filter-bar .btn {
        width: 100%;
    }

    .card-box {
        padding: 1.15rem;
    }

    .invoice-sheet {
        padding: 1.25rem;
    }

    .invoice-header {
        flex-direction: column;
        gap: 1rem;
    }

    .invoice-meta {
        text-align: left;
    }

    .totals-table {
        width: 100%;
    }

    .modal-card {
        margin: 0.5rem;
        max-height: 95vh;
    }

    .modal-body {
        padding: 1rem;
    }

    .modal-footer {
        padding: 0.75rem 1rem;
        flex-direction: column-reverse;
    }

    .modal-footer .btn {
        width: 100%;
    }
}

/* Print Stylesheet */
@media print {
    .app-sidebar,
    .app-topbar,
    .invoice-actions-bar,
    .public-top-bar,
    .btn,
    .no-print {
        display: none !important;
    }

    .app-main {
        margin: 0 !important;
    }

    .page-content {
        padding: 0 !important;
    }

    body {
        background-color: #fff !important;
        color: #000 !important;
    }

    .invoice-sheet {
        border: none !important;
        box-shadow: none !important;
        padding: 0 !important;
        max-width: 100% !important;
    }
}