/* ============================================================
   Uplink Precision System — Corporate Modern Light Design System
   Specification: Uplink_Light_DESIGN.md
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Hanken+Grotesk:wght@500;600;700;800&family=Inter:wght@400;500;600;700&display=swap');

:root {
    /* Color Palette */
    --uplink-primary: #004ecc;
    --uplink-primary-container: #1a6dff;
    --uplink-on-primary: #ffffff;
    --uplink-on-primary-container: #e6f0ff;
    --uplink-primary-gradient: linear-gradient(135deg, #004ecc, #1a6dff);
    
    --uplink-secondary: #00c853;
    --uplink-secondary-container: #b9f6ca;
    --uplink-on-secondary-container: #003314;
    --uplink-secondary-gradient: linear-gradient(135deg, #00e676, #00c853);
    
    --uplink-tertiary: #394156;
    --uplink-background: #f4f6fa;
    --uplink-surface: #ffffff;
    --uplink-surface-container: #e5eeff;
    
    --uplink-on-surface: #1e293b;
    --uplink-on-surface-variant: #64748b;
    --uplink-outline: #cbd5e1;
    --uplink-border: #e2e8f0;
    
    --uplink-glass-bg: rgba(255, 255, 255, 0.85);
    --uplink-glass-border: rgba(255, 255, 255, 0.4);

    /* Radii */
    --uplink-radius-sm: 8px;
    --uplink-radius-md: 12px;
    --uplink-radius-lg: 16px;
    --uplink-radius-xl: 24px;
    --uplink-radius-full: 9999px;

    /* Elevation */
    --uplink-shadow-soft: 0px 8px 24px rgba(0, 0, 0, 0.04);
    --uplink-shadow-hover: 0px 16px 32px rgba(0, 78, 204, 0.12);
    --uplink-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Reset & Typography */
body {
    background-color: var(--uplink-background);
    color: var(--uplink-on-surface);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6, .font-heading, .sidebar-brand {
    font-family: 'Hanken Grotesk', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    font-weight: 700;
    color: var(--uplink-on-surface);
    letter-spacing: -0.02em;
}

/* App Container Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

.app-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* Fixed Top Bar (72px height, Corporate Modern) */
.app-header {
    height: 80px;
    background: var(--uplink-glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--uplink-border);
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

.header-brand img {
    height: 42px;
    width: auto;
    object-fit: contain;
    transition: var(--uplink-transition);
}

.header-brand img:hover {
    transform: scale(1.05);
}

.header-brand-text {
    font-family: 'Hanken Grotesk', sans-serif;
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--uplink-primary);
    letter-spacing: -0.5px;
}

/* Horizontal Navigation */
.navbar {
    padding: 0;
}

@media (min-width: 992px) {
    .app-header .navbar-expand-lg .navbar-collapse,
    .app-header #topNavMenu,
    #topNavMenu.navbar-collapse,
    #topNavMenu.collapse {
        display: flex !important;
        visibility: visible !important;
        opacity: 1 !important;
    }
}

.nav-link {
    font-weight: 600;
    color: var(--uplink-on-surface-variant);
    padding: 0.75rem 1.25rem !important;
    border-radius: var(--uplink-radius-full);
    transition: var(--uplink-transition);
    margin: 0 0.25rem;
    font-size: 0.95rem;
}

.nav-link:hover, .nav-link:focus {
    color: var(--uplink-primary);
    background-color: var(--uplink-surface-container);
}

.nav-link.active {
    color: var(--uplink-on-primary) !important;
    background: var(--uplink-primary-gradient);
    box-shadow: 0 4px 12px rgba(0, 78, 204, 0.2);
}

.dropdown-menu {
    border: 1px solid var(--uplink-border);
    border-radius: var(--uplink-radius-md);
    box-shadow: var(--uplink-shadow-soft);
    padding: 0.5rem;
    animation: slideInDropdown 0.2s ease forwards;
}

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

.dropdown-item {
    border-radius: var(--uplink-radius-sm);
    padding: 0.6rem 1rem;
    font-weight: 500;
    color: var(--uplink-on-surface);
    transition: var(--uplink-transition);
}

.dropdown-item:hover {
    background-color: var(--uplink-surface-container);
    color: var(--uplink-primary);
}

/* User Avatar */
.avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--uplink-primary-gradient);
    color: var(--uplink-on-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    box-shadow: 0 4px 12px rgba(0, 78, 204, 0.2);
    transition: var(--uplink-transition);
}

.user-dropdown > a {
    text-decoration: none;
    color: var(--uplink-on-surface);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-dropdown > a:hover .avatar {
    transform: scale(1.05);
}

/* Content Area */
.app-content {
    animation: fadeIn 0.4s ease forwards;
    padding-top: 2rem !important;
    padding-bottom: 3rem !important;
}

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

/* =========================================================
   Global Component Overrides (Bootstrap Modernization)
   ========================================================= */

/* Cards (Glassmorphism + Smooth Elevation) */
.card {
    background: var(--uplink-surface);
    border: 1px solid rgba(255,255,255,0.8);
    border-radius: var(--uplink-radius-lg);
    box-shadow: var(--uplink-shadow-soft);
    transition: var(--uplink-transition);
    overflow: hidden;
    margin-bottom: 1.5rem;
}

.card:hover {
    box-shadow: var(--uplink-shadow-hover);
    transform: translateY(-3px);
}

.card-header {
    background: transparent;
    border-bottom: 1px solid var(--uplink-border);
    padding: 1.25rem 1.5rem;
    font-weight: 700;
    font-size: 1.15rem;
    color: var(--uplink-on-surface);
    font-family: 'Hanken Grotesk', sans-serif;
}

.card-body {
    padding: 1.5rem;
}

/* Buttons (Gradients & Glow) */
.btn {
    border-radius: var(--uplink-radius-md);
    font-weight: 600;
    padding: 0.6rem 1.5rem;
    transition: var(--uplink-transition);
    border: none;
    font-family: 'Inter', sans-serif;
}

.btn-primary {
    background: var(--uplink-primary-gradient);
    color: var(--uplink-on-primary);
    box-shadow: 0 4px 12px rgba(0, 78, 204, 0.2);
}

.btn-primary:hover, .btn-primary:focus {
    background: var(--uplink-primary-gradient);
    box-shadow: 0 8px 20px rgba(0, 78, 204, 0.4);
    transform: translateY(-2px);
    color: #fff;
}

.btn-success {
    background: var(--uplink-secondary-gradient);
    color: white;
    box-shadow: 0 4px 12px rgba(0, 200, 83, 0.2);
}

.btn-success:hover, .btn-success:focus {
    background: var(--uplink-secondary-gradient);
    box-shadow: 0 8px 20px rgba(0, 200, 83, 0.4);
    transform: translateY(-2px);
    color: white;
}

.btn-outline-primary {
    border: 2px solid var(--uplink-primary);
    color: var(--uplink-primary);
    background: transparent;
}

.btn-outline-primary:hover {
    background: var(--uplink-primary-gradient);
    border-color: transparent;
    color: white;
    box-shadow: 0 4px 12px rgba(0, 78, 204, 0.2);
}

/* Form Controls (Floating, Rounded, Soft Focus) */
.form-control, .form-select {
    border-radius: var(--uplink-radius-md);
    border: 1px solid var(--uplink-outline);
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    color: var(--uplink-on-surface);
    background-color: #fcfcfd;
    transition: var(--uplink-transition);
}

.form-control:focus, .form-select:focus {
    border-color: var(--uplink-primary);
    box-shadow: 0 0 0 4px rgba(0, 78, 204, 0.1);
    background-color: var(--uplink-surface);
}

.input-group-text {
    background-color: var(--uplink-surface-container);
    border: 1px solid var(--uplink-outline);
    color: var(--uplink-on-surface-variant);
    font-weight: 600;
}

.form-label {
    font-weight: 600;
    color: var(--uplink-on-surface);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

/* Tables (Clean, Striped, No borders) */
.table {
    border-collapse: separate;
    border-spacing: 0;
    width: 100%;
}

.table thead th {
    background-color: #f1f5f9;
    color: var(--uplink-on-surface-variant);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    padding: 1rem;
    border: none;
    border-bottom: 2px solid var(--uplink-border);
}

.table tbody td {
    padding: 1rem;
    vertical-align: middle;
    border-bottom: 1px solid var(--uplink-border);
    color: var(--uplink-on-surface);
    font-size: 0.95rem;
}

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

.table tbody tr:hover {
    background-color: #f8fafc;
    transform: scale(1.002);
}

/* Badges */
.badge {
    padding: 0.4em 0.8em;
    border-radius: var(--uplink-radius-full);
    font-weight: 600;
    font-size: 0.75rem;
}

.badge.bg-success {
    background-color: #dcfce7 !important;
    color: #166534 !important;
}

.badge.bg-danger {
    background-color: #fee2e2 !important;
    color: #991b1b !important;
}

.badge.bg-warning {
    background-color: #fef3c7 !important;
    color: #92400e !important;
}

.badge.bg-info {
    background-color: #e0f2fe !important;
    color: #075985 !important;
}

/* Utility Stats (Large numbers in cards) */
.text-info {
    color: var(--uplink-primary) !important;
}

.text-success {
    color: var(--uplink-secondary) !important;
}

.text-danger {
    color: #ef4444 !important;
}

/* DataTables Overrides */
.dataTables_wrapper .dataTables_filter input {
    border-radius: var(--uplink-radius-md);
    border: 1px solid var(--uplink-outline);
    padding: 0.4rem 0.8rem;
}

.dataTables_wrapper .dataTables_paginate .paginate_button.current, 
.dataTables_wrapper .dataTables_paginate .paginate_button.current:hover {
    background: var(--uplink-primary-gradient) !important;
    color: white !important;
    border: none;
    border-radius: var(--uplink-radius-sm);
    box-shadow: 0 4px 10px rgba(0, 78, 204, 0.2);
}

/* Interactive & Clickable Stat Cards */
.clickable-card, .stat-card-interactive {
    cursor: pointer !important;
    user-select: none;
    transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.2s ease, border-color 0.2s ease;
    border: 1px solid transparent;
}

.clickable-card:hover, .stat-card-interactive:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 24px rgba(0, 78, 204, 0.12) !important;
    border-color: rgba(0, 78, 204, 0.3) !important;
}

.clickable-card:active, .stat-card-interactive:active {
    transform: translateY(-1px) scale(0.99);
}

.stat-card-interactive.active-card {
    border-color: var(--uplink-primary) !important;
    background-color: var(--uplink-surface-container) !important;
    box-shadow: 0 6px 16px rgba(0, 78, 204, 0.15) !important;
}

/* Dashboard Elements & Pulse Animations */
.pulse-indicator {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    animation: pulse-ring 1.8s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
}

@keyframes pulse-ring {
    0% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(0, 200, 83, 0.7);
    }
    70% {
        transform: scale(1);
        box-shadow: 0 0 0 6px rgba(0, 200, 83, 0);
    }
    100% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(0, 200, 83, 0);
    }
}

.icon-shape {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.bi-spin {
    display: inline-block;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    100% { transform: rotate(360deg); }
}

.fw-black {
    font-weight: 800;
}

.fw-extrabold {
    font-weight: 800;
}