:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #64748b;
    --success: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --dark: #1e293b;
    --light: #f8fafc;
    --body-bg: #f1f5f9;
    --card-bg: #ffffff;
    --sidebar-bg: #0f172a;
    --sidebar-hover: #1e293b;
    --sidebar-active: #6366f1;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 40px rgba(0,0,0,0.15);
    --radius: 12px;
    --radius-lg: 16px;
    --radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

[data-theme="dark"] {
    --body-bg: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --shadow: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.4);
}

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

body {
    font-family: var(--font);
    background: var(--body-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: var(--transition);
}

a { text-decoration: none; color: inherit; transition: var(--transition); }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--text-muted); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* Sidebar */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 260px;
    height: 100vh;
    background: var(--sidebar-bg);
    z-index: 1040;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    box-shadow: 4px 0 20px rgba(0,0,0,0.15);
}

.sidebar-brand {
    padding: 20px 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-brand .brand-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    color: #fff;
}

.sidebar-brand h5 {
    color: #fff;
    font-weight: 700;
    font-size: 16px;
    margin: 0;
    line-height: 1.2;
}

.sidebar-brand small {
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 400;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    overflow-y: auto;
}

.sidebar-nav .nav-section {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 12px 12px 8px;
    margin-top: 8px;
}

.sidebar-nav .nav-item {
    margin-bottom: 2px;
}

.sidebar-nav .nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    color: #cbd5e1;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
}

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

.sidebar-nav .nav-link.active {
    background: var(--sidebar-active);
    color: #fff;
    box-shadow: 0 4px 12px rgba(99,102,241,0.4);
}

.sidebar-nav .nav-link i {
    width: 20px;
    text-align: center;
    font-size: 16px;
}

.sidebar-nav .nav-link .badge {
    margin-left: auto;
    font-size: 10px;
    padding: 3px 8px;
}

/* Main Content */
.main-content {
    margin-left: 260px;
    min-height: 100vh;
    transition: var(--transition);
}

/* Top Header */
.top-header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 1030;
    backdrop-filter: blur(20px);
    background: rgba(255,255,255,0.85);
}

[data-theme="dark"] .top-header {
    background: rgba(30,41,59,0.85);
}

.top-header .menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 20px;
    color: var(--text-primary);
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-sm);
}

.top-header .menu-toggle:hover {
    background: var(--body-bg);
}

.top-header .search-box {
    position: relative;
    max-width: 400px;
    flex: 1;
}

.top-header .search-box input {
    width: 100%;
    padding: 8px 16px 8px 40px;
    border: 1px solid var(--border-color);
    border-radius: 50px;
    background: var(--body-bg);
    font-size: 14px;
    color: var(--text-primary);
    transition: var(--transition);
}

.top-header .search-box input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.15);
}

.top-header .search-box i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 14px;
}

.top-header .header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.top-header .header-actions .btn-icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.top-header .header-actions .btn-icon:hover {
    background: var(--body-bg);
    color: var(--primary);
}

.top-header .header-actions .btn-icon .badge-dot {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 8px;
    height: 8px;
    background: var(--danger);
    border-radius: 50%;
    border: 2px solid var(--card-bg);
}

.user-dropdown {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 4px 12px 4px 4px;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.user-dropdown:hover {
    background: var(--body-bg);
}

.user-dropdown .user-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 600;
    font-size: 14px;
}

.user-dropdown .user-info {
    line-height: 1.2;
}

.user-dropdown .user-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
}

.user-dropdown .user-role {
    font-size: 11px;
    color: var(--text-muted);
}

/* Page Content */
.page-content {
    padding: 24px;
}

/* Cards */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-lg);
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h6 {
    font-weight: 600;
    font-size: 15px;
    margin: 0;
    color: var(--text-primary);
}

.card-body {
    padding: 20px;
}

/* Dashboard Stats */
.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    border-radius: 0 4px 4px 0;
}

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

.stat-card .stat-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}

.stat-card .stat-info h3 {
    font-size: 24px;
    font-weight: 700;
    margin: 0;
    line-height: 1;
    color: var(--text-primary);
}

.stat-card .stat-info p {
    font-size: 13px;
    color: var(--text-secondary);
    margin: 4px 0 0;
}

.stat-card .stat-change {
    font-size: 12px;
    font-weight: 600;
    margin-top: 4px;
}

.stat-card .stat-change.up { color: var(--success); }
.stat-card .stat-change.down { color: var(--danger); }

.stat-card.primary::before { background: var(--primary); }
.stat-card.primary .stat-icon { background: rgba(99,102,241,0.1); color: var(--primary); }
.stat-card.success::before { background: var(--success); }
.stat-card.success .stat-icon { background: rgba(34,197,94,0.1); color: var(--success); }
.stat-card.warning::before { background: var(--warning); }
.stat-card.warning .stat-icon { background: rgba(245,158,11,0.1); color: var(--warning); }
.stat-card.danger::before { background: var(--danger); }
.stat-card.danger .stat-icon { background: rgba(239,68,68,0.1); color: var(--danger); }
.stat-card.info::before { background: var(--info); }
.stat-card.info .stat-icon { background: rgba(59,130,246,0.1); color: var(--info); }
.stat-card.purple::before { background: #8b5cf6; }
.stat-card.purple .stat-icon { background: rgba(139,92,246,0.1); color: #8b5cf6; }

/* Tables */
.table-container {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.table thead th {
    background: var(--body-bg);
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

.table tbody td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
    color: var(--text-primary);
    vertical-align: middle;
}

.table tbody tr:hover {
    background: rgba(99,102,241,0.03);
}

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

/* Badges */
.badge {
    font-size: 11px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 6px;
    white-space: nowrap;
}

/* Buttons */
.btn {
    font-size: 14px;
    font-weight: 500;
    padding: 8px 18px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    box-shadow: 0 4px 12px rgba(99,102,241,0.4);
}

.btn-sm {
    padding: 5px 12px;
    font-size: 12px;
    border-radius: 6px;
}

.btn-icon {
    width: 34px;
    height: 34px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

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

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

/* Forms */
.form-control, .form-select {
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: var(--text-primary);
    background: var(--card-bg);
    transition: var(--transition);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.12);
    outline: none;
}

.form-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

/* Login Page */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
    padding: 20px;
}

.login-card {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-xl);
}

[data-theme="dark"] .login-card {
    background: rgba(30,41,59,0.95);
}

.login-card .brand {
    text-align: center;
    margin-bottom: 32px;
}

.login-card .brand .brand-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 24px;
    font-weight: 700;
    color: #fff;
}

.login-card .brand h4 {
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.login-card .brand p {
    color: var(--text-secondary);
    font-size: 14px;
    margin: 4px 0 0;
}

/* Modals */
.modal-content {
    border: none;
    border-radius: var(--radius);
    box-shadow: var(--shadow-xl);
}

.modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border-color);
}

/* Timeline */
.timeline {
    position: relative;
    padding-left: 28px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    padding-bottom: 20px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -24px;
    top: 4px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--primary);
    border: 3px solid var(--card-bg);
    box-shadow: 0 0 0 2px var(--primary);
}

.timeline-item .timeline-content {
    background: var(--body-bg);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 14px;
}

.timeline-item .timeline-date {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Client Profile */
.profile-header {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: var(--radius);
    padding: 30px;
    color: #fff;
    position: relative;
    overflow: hidden;
}

.profile-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 300px;
    height: 300px;
    background: rgba(255,255,255,0.05);
    border-radius: 50%;
}

.profile-header h3 {
    font-weight: 700;
    margin: 0;
}

.profile-header p {
    opacity: 0.8;
    margin: 4px 0 0;
}

/* Follow-up Card */
.followup-card {
    border-left: 3px solid var(--warning);
    padding: 12px 16px;
    background: var(--body-bg);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin-bottom: 8px;
}

.followup-card.completed {
    border-left-color: var(--success);
    opacity: 0.7;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.3;
}

.empty-state h5 {
    color: var(--text-secondary);
    margin-bottom: 8px;
}

/* Responsive */
@media (max-width: 991px) {
    .sidebar {
        transform: translateX(-100%);
    }

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

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

    .top-header .menu-toggle {
        display: block;
    }

    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0,0,0,0.5);
        z-index: 1035;
    }

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

@media (max-width: 575px) {
    .page-content {
        padding: 16px;
    }

    .stat-card {
        padding: 16px;
    }

    .stat-card .stat-info h3 {
        font-size: 20px;
    }

    .top-header {
        padding: 10px 16px;
    }

    .top-header .search-box {
        display: none;
    }
}

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

.fade-in {
    animation: fadeIn 0.4s ease-out;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

.slide-in {
    animation: slideIn 0.3s ease-out;
}

/* Signature Pad */
.signature-pad-wrapper { border: 2px solid var(--border-color); border-radius: var(--radius); padding: 4px; background: #fff; }
.signature-pad-wrapper canvas { width: 100%; height: 200px; cursor: crosshair; touch-action: none; }
.signature-pad-wrapper.active { border-color: var(--primary); }
.signature-preview { border: 2px dashed var(--border-color); border-radius: var(--radius); padding: 20px; text-align: center; min-height: 80px; display: flex; align-items: center; justify-content: center; flex-direction: column; }
.signature-preview.approved { border-color: var(--success); background: #f0fdf4; }
.signature-preview img { max-width: 200px; max-height: 60px; }

/* Package Cards */
.package-card { cursor: pointer; transition: var(--transition); position: relative; overflow: hidden; }
.package-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: var(--primary) !important; }
.package-card.selected { border-color: var(--primary) !important; background: rgba(99,102,241,0.03); }
.package-card.selected::after { content: '✓'; position: absolute; top: 8px; right: 8px; width: 20px; height: 20px; background: var(--primary); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 11px; font-weight: 700; }

/* GST Breakdown */
.gst-breakdown { font-size: 11px; color: var(--text-secondary); }

/* Coupon Input */
.coupon-input-group { display: flex; gap: 4px; }
.coupon-status { font-size: 12px; margin-top: 4px; }
.coupon-status.valid { color: var(--success); }
.coupon-status.invalid { color: var(--danger); }

/* Verification Badge */
.verification-badge { display: inline-flex; align-items: center; gap: 4px; font-size: 11px; padding: 3px 10px; border-radius: 6px; background: #dcfce7; color: #16a34a; font-weight: 600; }
.verification-badge i { font-size: 12px; }
.verification-badge.unverified { background: #f1f5f9; color: #94a3b8; }

/* Signature Tabs */
.sig-tabs .nav-link { font-size: 13px; font-weight: 600; color: var(--text-secondary); border: none; padding: 8px 16px; }
.sig-tabs .nav-link.active { color: var(--primary); border-bottom: 2px solid var(--primary); background: transparent; }

/* Service Category Buttons */
.service-cat-btn { font-size: 12px; padding: 5px 14px; border-radius: 20px; transition: var(--transition); }

/* Version History Timeline */
.version-item { display: flex; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--border-color); }
.version-item:last-child { border-bottom: none; }
.version-badge { width: 32px; height: 32px; background: linear-gradient(135deg, var(--primary), var(--primary-light)); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 700; flex-shrink: 0; }

/* QR Code Display */
.qr-display { text-align: center; padding: 16px; border: 2px solid var(--border-color); border-radius: var(--radius); }
.qr-display img { width: 80px; height: 80px; }

/* Payment Steps */
.payment-step { display: flex; align-items: center; gap: 10px; padding: 8px 0; }
.payment-step .step-num { width: 26px; height: 26px; background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 10px; font-weight: 800; flex-shrink: 0; }

/* Print */
@media print {
    .sidebar, .top-header, .no-print {
        display: none !important;
    }

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