/* ==========================================================================
   VULKAN ERP — ENTERPRISE & TELECOM DESIGN SYSTEM (v3.0)
   Responsive Continuum: 320px Smartphone -> Desktop -> 75" 4K UHD Wallboard
   ========================================================================== */

:root {
    /* Brand & Accent Palette */
    --vk-accent: #f97316;
    --vk-accent-hover: #ea580c;
    --vk-accent-soft: rgba(249, 115, 22, 0.14);
    --vk-primary: #2563eb;
    --vk-primary-hover: #1d4ed8;
    --vk-primary-soft: rgba(37, 99, 235, 0.10);

    /* Surfaces */
    --vk-bg-canvas: #f1f5f9;
    --vk-bg-surface: #ffffff;
    --vk-bg-subtle: #f8fafc;
    --vk-border: #e2e8f0;
    --vk-border-strong: #cbd5e1;

    /* Sidebar Obsidian Theme */
    --vk-sidebar-bg: #0b1120;
    --vk-sidebar-bg-end: #111827;
    --vk-sidebar-border: rgba(148, 163, 184, 0.12);
    --vk-sidebar-text: #cbd5e1;
    --vk-sidebar-muted: #64748b;
    --vk-sidebar-hover: rgba(255, 255, 255, 0.06);
    --vk-sidebar-width: 16.75rem;

    /* Typography & Text */
    --vk-text-main: #0f172a;
    --vk-text-secondary: #475569;
    --vk-text-muted: #64748b;

    /* Semantic Status */
    --vk-success: #10b981;
    --vk-warning: #f59e0b;
    --vk-danger: #ef4444;
    --vk-info: #0ea5e9;

    /* Elevation & Radii */
    --vk-radius-sm: 0.5rem;
    --vk-radius-md: 0.75rem;
    --vk-radius-lg: 1rem;
    --vk-shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
    --vk-shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
    --vk-shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.08), 0 4px 10px -4px rgba(15, 23, 42, 0.04);
    --vk-shadow-lg: 0 20px 40px -12px rgba(15, 23, 42, 0.16);

    /* Legacy variable aliases for backward compatibility */
    --color-bg-main: var(--vk-bg-canvas);
    --color-bg-sidebar: var(--vk-sidebar-bg);
    --color-fg-sidebar: #ffffff;
    --color-hover-sidebar: var(--vk-sidebar-hover);
    --color-topbar: #ffffff;
    --color-accent: var(--vk-accent);
}

/* ==========================================================================
   1. BASE & FLUID TYPOGRAPHY
   ========================================================================== */
html {
    font-size: 15.5px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--vk-bg-canvas) !important;
    color: var(--vk-text-main);
    overflow-x: hidden;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6,
.h1, .h2, .h3, .h4, .h5, .h6 {
    color: var(--vk-text-main);
    letter-spacing: -0.02em;
}

a {
    transition: color 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}

/* Prevent Chrome/Edge ugly autofill patches globally */
input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus,
textarea:-webkit-autofill,
select:-webkit-autofill {
    -webkit-box-shadow: 0 0 0 1000px #ffffff inset !important;
    -webkit-text-fill-color: var(--vk-text-main) !important;
    transition: background-color 5000s ease-in-out 0s;
}

/* ==========================================================================
   2. APP SHELL: SIDEBAR, BACKDROP & MAIN CANVAS
   ========================================================================== */
#wrapper {
    display: flex;
    width: 100%;
    min-height: 100vh;
    position: relative;
    overflow-x: clip;
}

#sidebar-wrapper {
    width: var(--vk-sidebar-width);
    min-width: var(--vk-sidebar-width);
    max-width: var(--vk-sidebar-width);
    background: linear-gradient(180deg, var(--vk-sidebar-bg) 0%, var(--vk-sidebar-bg-end) 100%);
    border-right: 1px solid var(--vk-sidebar-border) !important;
    display: flex;
    flex-direction: column;
    z-index: 1045;
    transition: transform 0.26s cubic-bezier(0.4, 0, 0.2, 1), margin-left 0.26s cubic-bezier(0.4, 0, 0.2, 1);
    user-select: none;
}

.sidebar-brand-box {
    padding: 1.15rem 1.15rem 1rem;
    border-bottom: 1px solid var(--vk-sidebar-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.sidebar-brand-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: #ffffff;
}

.sidebar-brand-logo {
    width: 40px;
    height: 40px;
    border-radius: 11px;
    background: linear-gradient(135deg, #f97316 0%, #dc2626 100%);
    box-shadow: 0 6px 16px rgba(249, 115, 22, 0.32);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.sidebar-brand-title {
    font-weight: 800;
    font-size: 1.08rem;
    letter-spacing: 0.03em;
    color: #f8fafc;
    line-height: 1.15;
}

.sidebar-brand-subtitle {
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #94a3b8;
    display: block;
}

.sidebar-nav-scroll {
    flex: 1 1 auto;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 0.85rem 0.75rem 1.5rem;
    scrollbar-width: thin;
    scrollbar-color: rgba(148, 163, 184, 0.25) transparent;
}

.sidebar-nav-scroll::-webkit-scrollbar {
    width: 5px;
}

.sidebar-nav-scroll::-webkit-scrollbar-thumb {
    background: rgba(148, 163, 184, 0.25);
    border-radius: 999px;
}

.sidebar-section-label {
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.09em;
    color: #64748b !important;
    padding: 0.85rem 0.75rem 0.4rem;
    margin: 0;
}

/* Sidebar Navigation Links */
.list-group-item.sidebar-item {
    background-color: transparent;
    color: var(--vk-sidebar-text);
    border: none;
    border-radius: 0.6rem !important;
    padding: 0.62rem 0.85rem;
    margin-bottom: 0.15rem;
    font-size: 0.88rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.65rem;
    transition: all 0.18s ease;
    line-height: 1.3;
}

.list-group-item.sidebar-item i.nav-icon {
    font-size: 1.05rem;
    width: 1.25rem;
    text-align: center;
    color: #94a3b8;
    transition: color 0.18s ease;
    flex-shrink: 0;
}

.list-group-item.sidebar-item:hover {
    background-color: var(--vk-sidebar-hover);
    color: #ffffff;
}

.list-group-item.sidebar-item:hover i.nav-icon {
    color: #f8fafc;
}

/* Top-level Active Item */
.list-group-item.sidebar-item.active {
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%) !important;
    color: #ffffff !important;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(249, 115, 22, 0.28);
}

.list-group-item.sidebar-item.active i.nav-icon {
    color: #ffffff !important;
}

/* Parent Group Header when Expanded/Active */
.list-group-item.sidebar-item.group-active {
    background-color: rgba(255, 255, 255, 0.05);
    color: #ffffff !important;
    font-weight: 600;
}

.list-group-item.sidebar-item.group-active i.nav-icon {
    color: var(--vk-accent) !important;
}

.sidebar-chevron {
    font-size: 0.72rem;
    color: #64748b;
    transition: transform 0.22s ease;
    margin-left: auto;
}

.sidebar-item[aria-expanded="true"] .sidebar-chevron {
    transform: rotate(180deg);
    color: #cbd5e1;
}

/* Submenu Items */
.sidebar-submenu {
    position: relative;
    margin-left: 1.15rem;
    padding-left: 0.65rem;
    border-left: 1px solid rgba(148, 163, 184, 0.16);
    margin-top: 0.15rem;
    margin-bottom: 0.35rem;
}

.sidebar-submenu .list-group-item.sidebar-subitem {
    background: transparent !important;
    color: #94a3b8;
    border: none;
    border-radius: 0.5rem !important;
    padding: 0.48rem 0.75rem !important;
    font-size: 0.83rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.1rem;
    transition: all 0.15s ease;
}

.sidebar-submenu .list-group-item.sidebar-subitem:hover {
    color: #f8fafc;
    background: rgba(255, 255, 255, 0.05) !important;
}

.sidebar-submenu .list-group-item.sidebar-subitem.active {
    color: #fb923c !important;
    background: rgba(249, 115, 22, 0.12) !important;
    font-weight: 600;
    box-shadow: none;
}

.sidebar-footer {
    padding: 0.75rem 1rem;
    border-top: 1px solid var(--vk-sidebar-border);
    background: rgba(2, 6, 23, 0.35);
    font-size: 0.74rem;
    color: #64748b;
}

/* Mobile Backdrop */
#sidebarBackdrop {
    position: fixed;
    inset: 0;
    background: rgba(2, 6, 23, 0.6);
    backdrop-filter: blur(3px);
    z-index: 1040;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

/* Main Content Wrapper */
#page-content-wrapper {
    flex: 1 1 auto;
    min-width: 0;
    width: 100%;
    display: flex;
    flex-direction: column;
    background-color: var(--vk-bg-canvas) !important;
}

.content-area {
    flex: 1 1 auto;
    width: 100%;
    max-width: 100%;
    padding: 1.35rem 1.5rem 2.25rem;
}

/* ==========================================================================
   3. TOPBAR NAVIGATION
   ========================================================================== */
.topbar-bg {
    background-color: rgba(255, 255, 255, 0.92) !important;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--vk-border) !important;
    min-height: 62px;
    position: sticky;
    top: 0;
    z-index: 1025;
    box-shadow: var(--vk-shadow-xs);
}

.topbar-btn-icon {
    width: 38px;
    height: 38px;
    border-radius: 0.6rem;
    border: 1px solid var(--vk-border);
    background: #ffffff;
    color: var(--vk-text-secondary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.18s ease;
}

.topbar-btn-icon:hover {
    background: var(--vk-bg-subtle);
    color: var(--vk-text-main);
    border-color: var(--vk-border-strong);
}

.topbar-btn-icon.active-mode {
    background: var(--vk-primary-soft);
    color: var(--vk-primary);
    border-color: rgba(37, 99, 235, 0.35);
}

.user-avatar-pill {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, #2563eb 0%, #4f46e5 100%);
    color: #ffffff;
    font-weight: 700;
    font-size: 0.85rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}

/* ==========================================================================
   4. CARDS, TABS, TABLES, FORMS & BADGES (ALL PAGES)
   ========================================================================== */
.card {
    background-color: var(--vk-bg-surface);
    border: 1px solid rgba(226, 232, 240, 0.85);
    border-radius: var(--vk-radius-md);
    box-shadow: var(--vk-shadow-sm);
}

.card-header {
    border-bottom: 1px solid var(--vk-border);
    padding: 1rem 1.25rem;
}

.hover-card {
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.hover-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--vk-shadow-md) !important;
    border-color: var(--vk-border-strong);
}

.icon-circle {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.uppercase-text {
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-size: 0.72rem;
    font-weight: 700;
}

.text-accent {
    color: var(--vk-accent) !important;
}

/* Universal Modern Tabs (Bootstrap .nav-tabs & .vulkan-tabs across ALL pages) */
.nav-tabs {
    border-bottom: 1px solid var(--vk-border);
    gap: 0.25rem;
    flex-wrap: nowrap;
    overflow-x: auto;
    overflow-y: hidden;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 1px;
}

.nav-tabs::-webkit-scrollbar {
    display: none;
}

.nav-tabs .nav-item {
    flex-shrink: 0;
}

.nav-tabs .nav-link {
    border: none;
    border-bottom: 2px solid transparent;
    border-radius: 0.5rem 0.5rem 0 0;
    color: var(--vk-text-secondary);
    font-weight: 600;
    font-size: 0.88rem;
    padding: 0.7rem 1.05rem;
    background: transparent;
    transition: all 0.18s ease;
}

.nav-tabs .nav-link:hover {
    color: var(--vk-primary);
    background-color: rgba(37, 99, 235, 0.04);
    border-color: transparent;
}

.nav-tabs .nav-link.active {
    color: var(--vk-primary) !important;
    background-color: transparent !important;
    border-bottom: 2.5px solid var(--vk-primary) !important;
}

/* Tables & DataTables Modernization */
.table {
    --bs-table-color: var(--vk-text-main);
    --bs-table-border-color: var(--vk-border);
    margin-bottom: 0;
    vertical-align: middle;
}

.table > thead > tr > th {
    background-color: #f8fafc;
    color: #475569;
    font-size: 0.73rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.82rem 0.9rem;
    border-bottom: 1px solid var(--vk-border);
    white-space: nowrap;
}

.table > tbody > tr > td {
    padding: 0.8rem 0.9rem;
    font-size: 0.88rem;
    border-bottom-color: #f1f5f9;
}

.table-hover > tbody > tr:hover > * {
    background-color: #f8fafc;
}

.dataTables_wrapper .dataTables_filter input,
.dataTables_wrapper .dataTables_length select {
    border: 1px solid var(--vk-border-strong);
    border-radius: 0.5rem;
    padding: 0.35rem 0.65rem;
    font-size: 0.85rem;
    background-color: #ffffff;
}

.dataTables_wrapper .dataTables_info,
.dataTables_wrapper .dataTables_paginate {
    padding-top: 0.85rem !important;
    font-size: 0.83rem;
    color: var(--vk-text-muted);
}

/* Forms & Controls */
.form-control,
.form-select {
    border-color: var(--vk-border-strong);
    border-radius: 0.55rem;
    font-size: 0.9rem;
    padding: 0.52rem 0.8rem;
    color: var(--vk-text-main);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--vk-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.14);
}

.form-label {
    font-size: 0.83rem;
    font-weight: 600;
    color: #334155;
    margin-bottom: 0.35rem;
}

.btn {
    border-radius: 0.55rem;
    font-weight: 600;
    letter-spacing: -0.005em;
}

.btn-primary {
    background-color: var(--vk-primary);
    border-color: var(--vk-primary);
}

.btn-primary:hover {
    background-color: var(--vk-primary-hover);
    border-color: var(--vk-primary-hover);
}

.badge {
    font-weight: 600;
    letter-spacing: 0.01em;
}

/* ==========================================================================
   5. TELECOM CALL CENTER & DIAGNOSTICS COMPONENTS
   ========================================================================== */
.pulse-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
    position: relative;
}

.pulse-dot.online {
    background-color: #10b981;
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    animation: vkPulseGreen 2s infinite;
}

.pulse-dot.offline {
    background-color: #ef4444;
    box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.6);
    animation: vkPulseRed 2.2s infinite;
}

@keyframes vkPulseGreen {
    0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.65); }
    70% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
    100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

@keyframes vkPulseRed {
    0% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.65); }
    70% { box-shadow: 0 0 0 8px rgba(239, 68, 68, 0); }
    100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

.telemetry-tile {
    background: #f8fafc;
    border: 1px solid var(--vk-border);
    border-radius: 0.75rem;
    padding: 0.85rem 1rem;
    height: 100%;
}

.telemetry-tile .tile-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--vk-text-muted);
    font-weight: 700;
}

.telemetry-tile .tile-value {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--vk-text-main);
    margin-top: 0.2rem;
    word-break: break-word;
}

/* ==========================================================================
   6. RESPONSIVE CONTINUUM: 320px MOBILE -> 75" 4K UHD (3840px)
   ========================================================================== */

/* --- A. Mobile & Tablet Drawer (< 992px) --- */
@media (max-width: 991.98px) {
    #sidebar-wrapper {
        position: fixed;
        top: 0;
        bottom: 0;
        left: 0;
        height: 100dvh;
        transform: translateX(-105%);
        box-shadow: var(--vk-shadow-lg);
    }

    #wrapper.toggled #sidebar-wrapper {
        transform: translateX(0);
    }

    #wrapper.toggled #sidebarBackdrop {
        opacity: 1;
        visibility: visible;
    }

    .content-area {
        padding: 1rem 0.9rem 2rem !important;
    }

    /* Make page header flexbars wrap cleanly on narrow screens */
    .content-area > .d-flex.justify-content-between,
    .card-header.d-flex.justify-content-between {
        flex-wrap: wrap;
        gap: 0.65rem;
    }

    /* DataTables mobile controls stack */
    .dataTables_wrapper .dataTables_length,
    .dataTables_wrapper .dataTables_filter {
        text-align: left !important;
        margin-bottom: 0.6rem;
    }

    .dataTables_wrapper .dataTables_filter input {
        width: 100% !important;
        margin-left: 0 !important;
        margin-top: 0.25rem;
    }
}

/* --- B. Small Smartphones (320px - 575px) --- */
@media (max-width: 575.98px) {
    html {
        font-size: 14.75px;
    }

    .content-area {
        padding: 0.85rem 0.65rem 1.75rem !important;
    }

    /* Prevent iOS auto-zoom on form focus */
    .form-control,
    .form-select,
    input[type="text"],
    input[type="email"],
    input[type="password"],
    input[type="number"],
    input[type="tel"] {
        font-size: 16px !important;
    }

    .card-body {
        padding: 1rem !important;
    }

    h2, .h2 {
        font-size: 1.35rem;
    }

    /* Responsive global search bar on mobile */
    .global-search-pill {
        border-radius: 0.85rem !important;
        flex-wrap: wrap;
    }

    .global-search-pill .btn-search-submit {
        width: 100%;
        border-radius: 0 0 0.75rem 0.75rem !important;
        padding-top: 0.65rem;
        padding-bottom: 0.65rem;
    }
}

/* --- C. Desktop Standard (>= 992px) --- */
@media (min-width: 992px) {
    #sidebar-wrapper {
        position: sticky;
        top: 0;
        height: 100vh;
        margin-left: 0;
        transform: none;
    }

    #wrapper.toggled #sidebar-wrapper {
        margin-left: calc(var(--vk-sidebar-width) * -1);
    }
}

/* --- D. Full HD / Executive Monitors (>= 1920px) --- */
@media (min-width: 1920px) {
    html {
        font-size: 16.25px;
    }

    :root {
        --vk-sidebar-width: 17.5rem;
    }

    .content-area {
        padding: 1.75rem 2.25rem 2.75rem;
    }
}

/* --- E. 2K QHD / Ultrawide Monitors (>= 2560px) --- */
@media (min-width: 2560px) {
    html {
        font-size: 18.5px;
    }

    :root {
        --vk-sidebar-width: 18.5rem;
    }

    .content-area {
        padding: 2rem 2.75rem 3rem;
    }

    .icon-circle {
        width: 56px;
        height: 56px;
    }
}

/* --- F. 4K UHD & 75-Inch Smart TV / NOC Displays (>= 3200px) --- */
@media (min-width: 3200px) {
    html {
        font-size: 22px;
    }

    :root {
        --vk-sidebar-width: 19.5rem;
    }

    .content-area {
        padding: 2.25rem 3.25rem 3.5rem;
    }

    .icon-circle {
        width: 64px;
        height: 64px;
    }
}

/* --- G. Explicit TV / 75" Wallboard Mode Toggle (works on 1080p/4K TVs at any DPI) --- */
body.tv-wallboard-mode {
    background-color: #070d19 !important;
    color: #f1f5f9 !important;
}

body.tv-wallboard-mode html,
html:has(body.tv-wallboard-mode) {
    font-size: clamp(16px, 1.05vw, 23px);
}

body.tv-wallboard-mode #page-content-wrapper {
    background-color: #070d19 !important;
}

body.tv-wallboard-mode .topbar-bg {
    background-color: rgba(15, 23, 42, 0.94) !important;
    border-bottom-color: rgba(148, 163, 184, 0.16) !important;
    color: #f8fafc !important;
}

body.tv-wallboard-mode .topbar-bg .text-dark {
    color: #f8fafc !important;
}

body.tv-wallboard-mode .card {
    background-color: #0f172a !important;
    border-color: rgba(148, 163, 184, 0.18) !important;
    color: #f1f5f9 !important;
}

body.tv-wallboard-mode .card-header {
    background-color: rgba(15, 23, 42, 0.9) !important;
    border-bottom-color: rgba(148, 163, 184, 0.16) !important;
}

body.tv-wallboard-mode h1,
body.tv-wallboard-mode h2,
body.tv-wallboard-mode h3,
body.tv-wallboard-mode h4,
body.tv-wallboard-mode h5,
body.tv-wallboard-mode h6,
body.tv-wallboard-mode .text-dark {
    color: #f8fafc !important;
}

body.tv-wallboard-mode .text-muted {
    color: #94a3b8 !important;
}

body.tv-wallboard-mode .table {
    --bs-table-color: #e2e8f0;
    --bs-table-bg: transparent;
    --bs-table-border-color: rgba(148, 163, 184, 0.16);
}

body.tv-wallboard-mode .table > thead > tr > th {
    background-color: #1e293b !important;
    color: #cbd5e1 !important;
}

body.tv-wallboard-mode .telemetry-tile {
    background-color: #1e293b !important;
    border-color: rgba(148, 163, 184, 0.2) !important;
}

body.tv-wallboard-mode .telemetry-tile .tile-value {
    color: #ffffff !important;
}