/* ============================================
   CRM SYSTEM - MODERN PROFESSIONAL SAAS DESIGN
   Version: 4.0 (Linear/Stripe SaaS Aesthetic)
   ============================================ */

/* ==================== ROOT TOKENS ==================== */
:root {
    /* Brand & Accent */
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #eef2ff;
    --primary-subtle: rgba(79, 70, 229, 0.08);
    --secondary: #64748b;
    --secondary-hover: #475569;
    
    /* Semantic Colors */
    --success: #10b981;
    --success-light: #ecfdf5;
    --success-border: #a7f3d0;
    --danger: #ef4444;
    --danger-light: #fef2f2;
    --danger-border: #fecaca;
    --warning: #f59e0b;
    --warning-light: #fffbeb;
    --warning-border: #fde68a;
    --info: #0ea5e9;
    --info-light: #f0f9ff;
    --info-border: #bae6fd;

    /* Slate Neutral Scale */
    --slate-50: #f8fafc;
    --slate-100: #f1f5f9;
    --slate-200: #e2e8f0;
    --slate-300: #cbd5e1;
    --slate-400: #94a3b8;
    --slate-500: #64748b;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-800: #1e293b;
    --slate-900: #0f172a;

    /* Surface & Background */
    --bg-page: #f8fafc;
    --bg-surface: #ffffff;
    --bg-sidebar: #0f172a;
    --border-color: #e2e8f0;
    --border-color-dark: #cbd5e1;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-heading: 'Plus Jakarta Sans', var(--font-sans);

    /* Radii */
    --radius-sm: 0.375rem;
    --radius: 0.625rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;

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

    /* Transitions */
    --transition: all 0.18s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==================== GLOBAL BASE ==================== */
html, body {
    font-family: var(--font-sans);
    background-color: var(--bg-page);
    color: var(--slate-700);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-size: 0.875rem;
    line-height: 1.5;
}

h1, h2, h3, h4, h5, h6, .h1, .h2, .h3, .h4, .h5, .h6 {
    font-family: var(--font-heading);
    color: var(--slate-900);
    font-weight: 700;
    letter-spacing: -0.02em;
}

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

a:hover {
    color: var(--primary-hover);
    text-decoration: none;
}

/* ==================== CONTENT WRAPPER & HEADER ==================== */
.content-wrapper {
    background-color: var(--bg-page) !important;
    min-height: calc(100vh - 57px);
}

.content-header {
    padding: 1.25rem 1.5rem 0.75rem 1.5rem !important;
}

.content-header h1 {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--slate-900);
}

.content-header .breadcrumb {
    font-size: 0.78rem;
}

.content-header .breadcrumb-item a {
    color: var(--slate-500);
    font-weight: 500;
}

.content-header .breadcrumb-item a:hover {
    color: var(--primary);
}

.content-header .breadcrumb-item.active {
    color: var(--slate-800);
    font-weight: 600;
}

.content {
    padding: 0 1.5rem 2rem 1.5rem !important;
}

/* ==================== MODERN NAVBAR ==================== */
.modern-navbar {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--slate-200) !important;
    padding: 0.5rem 1.25rem !important;
    box-shadow: var(--shadow-xs);
    z-index: 1030;
}

.nav-icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    color: var(--slate-600) !important;
    transition: var(--transition);
}

.nav-icon-btn:hover {
    background: var(--slate-100);
    color: var(--slate-900) !important;
}

.pulse-badge {
    position: absolute;
    top: 6px;
    right: 6px;
    font-size: 0.65rem;
    padding: 2px 5px;
    border-radius: 9999px;
    box-shadow: 0 0 0 2px #fff;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 5px rgba(239, 68, 68, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

.user-profile-btn {
    background: var(--slate-50);
    border: 1px solid var(--slate-200);
    transition: var(--transition);
    text-decoration: none !important;
}

.user-profile-btn:hover {
    background: var(--slate-100);
    border-color: var(--slate-300);
}

.avatar-ring {
    border: 2px solid #fff;
    box-shadow: 0 0 0 1px var(--slate-200);
}

.modern-dropdown {
    border-radius: var(--radius-md) !important;
    border: 1px solid var(--slate-200) !important;
    box-shadow: var(--shadow-lg) !important;
    overflow: hidden;
    padding: 0.25rem;
}

.modern-dropdown .dropdown-item {
    font-size: 0.825rem;
    border-radius: var(--radius-sm);
    color: var(--slate-700);
    transition: var(--transition);
}

.modern-dropdown .dropdown-item:hover {
    background-color: var(--slate-100);
    color: var(--slate-900);
}

/* ==================== MODERN SIDEBAR ==================== */
.main-sidebar, .sidebar-dark-primary {
    background-color: var(--bg-sidebar) !important;
    border-right: 1px solid rgba(255, 255, 255, 0.05);
}

.brand-link {
    background: var(--bg-sidebar) !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08) !important;
    padding: 0.95rem 1.25rem !important;
    display: flex !important;
    align-items: center;
}

.brand-logo-badge {
    width: 34px;
    height: 34px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, #4f46e5 0%, #3730a3 100%);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    box-shadow: 0 2px 8px rgba(79, 70, 229, 0.4);
    margin-right: 10px;
}

.brand-link .brand-text {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    letter-spacing: -0.02em;
    color: #ffffff !important;
}

.text-primary-light {
    color: #818cf8 !important;
}

.sidebar {
    padding-left: 0.75rem !important;
    padding-right: 0.75rem !important;
}

.sidebar .user-panel {
    border-bottom: 1px solid rgba(255, 255, 255, 0.06) !important;
    padding: 0.75rem 0.5rem !important;
    margin-bottom: 0.75rem !important;
}

.sidebar .user-panel .info a {
    color: #f1f5f9 !important;
    font-weight: 600;
    font-size: 0.85rem;
}

.sidebar .user-panel .info small {
    color: #94a3b8 !important;
    font-size: 0.72rem;
    display: block;
}

/* Sidebar Nav Items */
.nav-sidebar .nav-header {
    font-size: 0.68rem !important;
    font-weight: 700 !important;
    letter-spacing: 0.08em !important;
    text-transform: uppercase !important;
    color: #64748b !important;
    padding: 1.25rem 0.75rem 0.4rem 0.75rem !important;
}

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

.nav-sidebar .nav-link {
    border-radius: var(--radius-sm) !important;
    padding: 0.55rem 0.85rem !important;
    color: #94a3b8 !important;
    font-size: 0.84rem;
    font-weight: 500;
    transition: var(--transition);
    display: flex;
    align-items: center;
}

.nav-sidebar .nav-link .nav-icon {
    font-size: 0.95rem;
    width: 1.4rem;
    margin-right: 0.6rem;
    color: #64748b;
    transition: var(--transition);
}

.nav-sidebar .nav-link:hover {
    background-color: rgba(255, 255, 255, 0.06) !important;
    color: #ffffff !important;
}

.nav-sidebar .nav-link:hover .nav-icon {
    color: #ffffff;
}

.nav-sidebar .nav-link.active,
.nav-sidebar > .nav-item.menu-open > .nav-link {
    background: #4f46e5 !important;
    color: #ffffff !important;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.35);
}

.nav-sidebar .nav-link.active .nav-icon,
.nav-sidebar > .nav-item.menu-open > .nav-link .nav-icon {
    color: #ffffff !important;
}

.nav-treeview {
    padding-left: 0.5rem;
    margin-top: 2px;
    margin-bottom: 2px;
}

.nav-treeview .nav-link {
    padding: 0.45rem 0.85rem !important;
    font-size: 0.8rem;
    color: #94a3b8 !important;
}

.nav-treeview .nav-link .nav-icon {
    font-size: 0.5rem !important;
    width: 1rem;
    margin-right: 0.5rem;
}

.nav-treeview .nav-link.active {
    background: rgba(79, 70, 229, 0.2) !important;
    color: #818cf8 !important;
    box-shadow: none !important;
}

/* ==================== MODERN CARDS ==================== */
.card {
    background: var(--bg-surface);
    border: 1px solid var(--slate-200) !important;
    border-radius: var(--radius-md) !important;
    box-shadow: var(--shadow-sm) !important;
    transition: var(--transition);
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--shadow-md) !important;
}

.card-header {
    background-color: transparent !important;
    border-bottom: 1px solid var(--slate-200) !important;
    padding: 1rem 1.25rem !important;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.card-header .card-title {
    font-size: 1rem !important;
    font-weight: 700 !important;
    color: var(--slate-900) !important;
    margin: 0;
    display: flex;
    align-items: center;
}

.card-header .card-tools {
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.card-body {
    padding: 1.25rem !important;
}

.card-footer {
    background-color: var(--slate-50) !important;
    border-top: 1px solid var(--slate-200) !important;
    padding: 0.85rem 1.25rem !important;
}

/* Specific Card Headers */
.card-header.bg-primary,
.card-header.bg-info,
.card-header.bg-success,
.card-header.bg-danger {
    background: #ffffff !important;
    border-bottom: 1px solid var(--slate-200) !important;
    color: var(--slate-900) !important;
}

.card-header.bg-primary .card-title,
.card-header.bg-info .card-title,
.card-header.bg-success .card-title,
.card-header.bg-danger .card-title {
    color: var(--slate-900) !important;
}

.card-header.bg-primary .card-title i,
.card-header.bg-info .card-title i {
    color: var(--primary) !important;
}

/* ==================== EXECUTIVE KPI / STAT CARDS ==================== */
.kpi-card, .small-box {
    background: var(--bg-surface) !important;
    border: 1px solid var(--slate-200) !important;
    border-radius: var(--radius-md) !important;
    box-shadow: var(--shadow-sm) !important;
    padding: 1.25rem !important;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    margin-bottom: 1.5rem;
    color: var(--slate-800) !important;
}

.kpi-card:hover, .small-box:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg) !important;
    border-color: var(--slate-300) !important;
}

.small-box .inner {
    padding: 0 !important;
    display: flex;
    flex-direction: column;
}

.small-box .inner p {
    font-size: 0.75rem !important;
    font-weight: 600 !important;
    text-transform: uppercase !important;
    letter-spacing: 0.06em !important;
    color: var(--slate-500) !important;
    margin-bottom: 0.35rem !important;
    order: 1;
}

.small-box .inner h3 {
    font-size: 1.85rem !important;
    font-weight: 800 !important;
    color: var(--slate-900) !important;
    letter-spacing: -0.02em !important;
    margin: 0 !important;
    order: 2;
}

.small-box .icon {
    position: absolute;
    top: 1.25rem;
    right: 1.25rem;
    transform: none !important;
    font-size: 1.25rem !important;
    width: 44px;
    height: 44px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.small-box:hover .icon {
    transform: scale(1.08) !important;
}

.small-box .small-box-footer {
    background: transparent !important;
    color: var(--primary) !important;
    font-weight: 600;
    font-size: 0.78rem !important;
    padding: 0.85rem 0 0 0 !important;
    margin-top: 0.85rem !important;
    border-top: 1px solid var(--slate-100) !important;
    text-align: left !important;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    transition: var(--transition);
}

.small-box .small-box-footer:hover {
    color: var(--primary-hover) !important;
    transform: translateX(2px);
}

/* Icon Badges by Category */
.small-box.bg-info .icon {
    background-color: var(--info-light) !important;
    color: var(--info) !important;
}

.small-box.bg-success .icon {
    background-color: var(--success-light) !important;
    color: var(--success) !important;
}

.small-box.bg-warning .icon {
    background-color: var(--warning-light) !important;
    color: var(--warning) !important;
}

.small-box.bg-danger .icon {
    background-color: var(--danger-light) !important;
    color: var(--danger) !important;
}

.small-box.bg-primary .icon {
    background-color: var(--primary-light) !important;
    color: var(--primary) !important;
}

/* ==================== MODERN TABLES ==================== */
.table-responsive {
    border-radius: var(--radius-md);
}

.table {
    color: var(--slate-700);
    margin-bottom: 0;
    border-collapse: separate;
    border-spacing: 0;
    width: 100%;
}

.table thead th {
    background-color: var(--slate-50) !important;
    color: var(--slate-600) !important;
    font-size: 0.72rem !important;
    font-weight: 700 !important;
    text-transform: uppercase !important;
    letter-spacing: 0.06em !important;
    border-top: none !important;
    border-bottom: 1px solid var(--slate-200) !important;
    padding: 0.85rem 1rem !important;
    white-space: nowrap;
}

.table tbody td {
    padding: 0.85rem 1rem !important;
    vertical-align: middle !important;
    border-top: 1px solid var(--slate-100) !important;
    font-size: 0.84rem;
    color: var(--slate-700);
}

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

.table-hover tbody tr:hover {
    background-color: var(--slate-50) !important;
}

.table-bordered {
    border: 1px solid var(--slate-200) !important;
}

.table-bordered td, .table-bordered th {
    border-color: var(--slate-200) !important;
}

/* ==================== STATUS PILL BADGES ==================== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.65rem;
    font-size: 0.72rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    letter-spacing: 0.02em;
    line-height: 1.2;
}

.badge-success {
    background-color: var(--success-light) !important;
    color: #065f46 !important;
    border: 1px solid var(--success-border);
}

.badge-danger {
    background-color: var(--danger-light) !important;
    color: #991b1b !important;
    border: 1px solid var(--danger-border);
}

.badge-warning {
    background-color: var(--warning-light) !important;
    color: #92400e !important;
    border: 1px solid var(--warning-border);
}

.badge-info {
    background-color: var(--info-light) !important;
    color: #075985 !important;
    border: 1px solid var(--info-border);
}

.badge-primary {
    background-color: var(--primary-light) !important;
    color: #3730a3 !important;
    border: 1px solid #c7d2fe;
}

.badge-secondary {
    background-color: var(--slate-100) !important;
    color: var(--slate-700) !important;
    border: 1px solid var(--slate-200);
}

/* ==================== MODERN BUTTONS ==================== */
.btn {
    font-family: var(--font-sans);
    font-size: 0.84rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    padding: 0.48rem 0.95rem;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    border: 1px solid transparent;
}

.btn-sm {
    padding: 0.32rem 0.65rem;
    font-size: 0.78rem;
    border-radius: var(--radius-sm);
}

.btn-primary {
    background-color: var(--primary) !important;
    border-color: var(--primary) !important;
    color: #ffffff !important;
    box-shadow: 0 1px 2px 0 rgba(79, 70, 229, 0.2);
}

.btn-primary:hover {
    background-color: var(--primary-hover) !important;
    border-color: var(--primary-hover) !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px rgba(79, 70, 229, 0.25);
}

.btn-secondary {
    background-color: var(--slate-100) !important;
    border-color: var(--slate-200) !important;
    color: var(--slate-700) !important;
}

.btn-secondary:hover {
    background-color: var(--slate-200) !important;
    color: var(--slate-900) !important;
}

.btn-light {
    background-color: #ffffff !important;
    border-color: var(--slate-200) !important;
    color: var(--slate-700) !important;
}

.btn-light:hover {
    background-color: var(--slate-50) !important;
    border-color: var(--slate-300) !important;
    color: var(--slate-900) !important;
}

.btn-success {
    background-color: #059669 !important;
    border-color: #059669 !important;
    color: #ffffff !important;
}

.btn-success:hover {
    background-color: #047857 !important;
    border-color: #047857 !important;
    transform: translateY(-1px);
}

.btn-danger {
    background-color: #dc2626 !important;
    border-color: #dc2626 !important;
    color: #ffffff !important;
}

.btn-danger:hover {
    background-color: #b91c1c !important;
    border-color: #b91c1c !important;
    transform: translateY(-1px);
}

.btn-warning {
    background-color: #d97706 !important;
    border-color: #d97706 !important;
    color: #ffffff !important;
}

.btn-warning:hover {
    background-color: #b45309 !important;
    border-color: #b45309 !important;
    transform: translateY(-1px);
}

/* ==================== FORMS & INPUTS ==================== */
.form-group label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--slate-700);
    margin-bottom: 0.35rem;
}

.form-control, .custom-select {
    border-radius: var(--radius-sm);
    border: 1px solid var(--slate-300);
    padding: 0.5rem 0.85rem;
    font-size: 0.85rem;
    color: var(--slate-800);
    background-color: #ffffff;
    transition: var(--transition);
}

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

.form-control-sm {
    padding: 0.3rem 0.65rem;
    font-size: 0.78rem;
}

.input-group-text {
    background-color: var(--slate-50);
    border-color: var(--slate-300);
    color: var(--slate-500);
    border-radius: var(--radius-sm);
}

/* ==================== TABS & PILLS ==================== */
.nav-tabs {
    border-bottom: 1px solid var(--slate-200);
    gap: 0.25rem;
}

.nav-tabs .nav-link {
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--slate-500);
    font-weight: 600;
    font-size: 0.85rem;
    padding: 0.65rem 1rem;
    transition: var(--transition);
    background: transparent;
}

.nav-tabs .nav-link:hover {
    color: var(--slate-800);
    border-bottom-color: var(--slate-300);
}

.nav-tabs .nav-link.active {
    color: var(--primary) !important;
    border-bottom-color: var(--primary) !important;
    background: transparent !important;
}

/* ==================== PAGINATION ==================== */
.pagination .page-link {
    border: 1px solid var(--slate-200);
    color: var(--slate-700);
    font-size: 0.825rem;
    font-weight: 500;
    padding: 0.45rem 0.85rem;
    border-radius: var(--radius-sm);
    margin: 0 2px;
}

.pagination .page-link:hover {
    background-color: var(--slate-100);
    color: var(--slate-900);
}

.pagination .page-item.active .page-link {
    background-color: var(--primary);
    border-color: var(--primary);
    color: #ffffff;
    box-shadow: 0 2px 4px rgba(79, 70, 229, 0.25);
}

/* ==================== ALERTS ==================== */
.alert {
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    padding: 0.85rem 1.15rem;
    font-size: 0.85rem;
    font-weight: 500;
    display: flex;
    align-items: center;
}

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

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

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

.alert-info {
    background-color: var(--info-light);
    border-color: var(--info-border);
    color: #075985;
}

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

.modal-header {
    border-bottom: 1px solid var(--slate-100);
    padding: 1.15rem 1.5rem;
}

.modal-footer {
    border-top: 1px solid var(--slate-100);
    padding: 1rem 1.5rem;
}

.modal-backdrop.show {
    opacity: 0.45;
    backdrop-filter: blur(3px);
}