/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette */
    --primary-color: #0078d4;
    --primary-hover: #106ebe;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    
    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f8f9fa;
    --gray-100: #e9ecef;
    --gray-200: #dee2e6;
    --gray-300: #ced4da;
    --gray-400: #adb5bd;
    --gray-500: #6c757d;
    --gray-600: #495057;
    --gray-700: #343a40;
    --gray-800: #212529;
    --gray-900: #121212;
    
    /* Dark Theme Colors */
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --border-color: #30363d;
    --border-hover: #484f58;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Sidebar Styles */
.sidebar {
    width: 280px;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    left: 0;
    top: 0;
    z-index: 1000;
    transition: transform var(--transition-normal);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    font-size: var(--font-size-lg);
    color: var(--text-primary);
}

.logo i {
    color: var(--primary-color);
    font-size: var(--font-size-xl);
}

.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
    z-index: 1002;
}

.sidebar-toggle:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
}

/* Search Box */
.search-box {
    position: relative;
    margin-bottom: var(--spacing-lg);
}

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

.search-box input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-sm) var(--spacing-sm) 2.5rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 120, 212, 0.1);
}

.search-box input::placeholder {
    color: var(--text-muted);
}

/* Navigation Menu */
.nav-menu {
    list-style: none;
}

.nav-item {
    margin-bottom: var(--spacing-xs);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.nav-link:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.nav-link.active {
    background-color: var(--primary-color);
    color: var(--white);
}

.nav-link i {
    width: 16px;
    text-align: center;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 280px;
    padding: var(--spacing-xl);
    max-width: calc(100vw - 280px);
}

/* Always show mobile toggle button */
.mobile-toggle {
    display: flex !important;
    position: fixed !important;
    top: 1.5rem !important;
    left: 1.5rem !important;
    z-index: 1001 !important;
    background-color: #0078d4 !important;
    color: #ffffff !important;
    border-radius: 0.375rem !important;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06) !important;
    width: 48px !important;
    height: 48px !important;
    align-items: center !important;
    justify-content: center !important;
    border: none !important;
    padding: 0 !important;
    margin: 0 !important;
    cursor: pointer !important;
    transition: all 150ms ease-in-out !important;
    font-size: 1.125rem !important;
    animation: mobileTogglePulse 3s infinite;
}

.mobile-toggle:hover {
    background-color: #106ebe !important;
    color: #ffffff !important;
    transform: scale(1.05) !important;
}

.mobile-toggle:focus {
    outline: none !important;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06), 0 0 0 3px rgba(0, 120, 212, 0.1) !important;
}

.mobile-toggle i {
    color: #ffffff !important;
    font-size: 1.125rem !important;
}

/* Subtle attention-grabbing animation */
@keyframes mobileTogglePulse {
    0%, 100% { 
        box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06), 0 0 0 0 rgba(0, 120, 212, 0.4);
    }
    50% { 
        box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06), 0 0 0 8px rgba(0, 120, 212, 0.1);
    }
}



/* Hide mobile toggle on larger screens */
@media (min-width: 1201px) {
    .mobile-toggle {
        display: none;
    }
}

.content-header {
    margin-bottom: var(--spacing-2xl);
}

.content-header h1 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.lead {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    font-weight: 400;
}

.content-body {
    max-width: 1200px;
}

/* Cards */
.card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
    overflow: hidden;
    transition: all var(--transition-normal);
}

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

.card-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-tertiary);
}

.card-header h2 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.card-header i {
    color: var(--primary-color);
}

.card-body {
    padding: var(--spacing-lg);
}

/* Status Card */
.status-card {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.status-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--gray-500);
    animation: pulse 2s infinite;
}

.status-dot.online {
    background-color: var(--success-color);
}

.status-dot.offline {
    background-color: var(--danger-color);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.status-text {
    font-weight: 600;
    font-size: var(--font-size-lg);
}

.status-description {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* Steps */
.steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.step {
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
}

.step-number {
    width: 32px;
    height: 32px;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: var(--font-size-sm);
    flex-shrink: 0;
}

.step-content h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.step-content p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* Grid Layout */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

/* Feature Lists */
.feature-list {
    list-style: none;
    margin: var(--spacing-md) 0;
}

.feature-list li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    position: relative;
    padding-left: var(--spacing-lg);
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: 600;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    color: var(--white);
    text-decoration: none;
}

/* Link Grid */
.link-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.link-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.link-card:hover {
    background-color: var(--primary-color);
    color: var(--white);
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.link-card i {
    font-size: var(--font-size-lg);
    width: 20px;
    text-align: center;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .sidebar {
        transform: translateX(-100%);
        box-shadow: var(--shadow-xl);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
        max-width: 100vw;
        position: relative;
    }
    

    
    .grid {
        grid-template-columns: 1fr;
    }
    
    /* Overlay for mobile sidebar */
    .sidebar-overlay {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: rgba(0, 0, 0, 0.5);
        z-index: 999;
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }
    
    .sidebar-overlay.active {
        opacity: 1;
        visibility: visible;
    }
}

@media (max-width: 768px) {
    .main-content {
        padding: var(--spacing-lg);
    }
    
    .content-header h1 {
        font-size: var(--font-size-3xl);
    }
    
    .lead {
        font-size: var(--font-size-lg);
    }
    
    .card-header,
    .card-body {
        padding: var(--spacing-md);
    }
    
    .steps {
        gap: var(--spacing-md);
    }
    
    .step {
        gap: var(--spacing-md);
    }
    
    .link-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: var(--spacing-md);
    }
    
    .content-header h1 {
        font-size: var(--font-size-2xl);
    }
    
    .sidebar {
        width: 100%;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

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

/* Device Tabs */
.device-tabs {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

/* --- Mobile polish (≤ 640px) --- */
@media (max-width: 640px) {
  /* stop any horizontal scroll */
  html, body { overflow-x: hidden; }

  /* Sidebar becomes off-canvas */
  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;          /* left side */
    width: 80vw;                /* readable width on phones */
    max-width: 320px;
    transform: translateX(-100%);
    transition: transform .25s ease;
    z-index: 1000;
    box-shadow: 2px 0 16px rgba(0,0,0,.2);
  }
  .sidebar.open { transform: translateX(0); }

  /* Dark scrim behind sidebar when open */
  .sidebar-scrim {
    position: fixed; inset: 0;
    background: rgba(0,0,0,.35);
    opacity: 0; pointer-events: none;
    transition: opacity .2s;
    z-index: 999;
  }
  .sidebar-scrim.visible { opacity: 1; pointer-events: auto; }

  /* Top bar spacing */
  .sidebar-header { padding-right: .5rem; }
  .sidebar-toggle { font-size: 1.25rem; padding: .5rem .6rem; }

  /* Main content gets full width and tighter paddings */
  .main-content { padding: 1rem; }
  .card { padding: 1rem; }
  .card-header h2 { font-size: 1.1rem; }

  /* Status indicator: stack neatly, larger tap targets */
  .status-indicator { gap: .5rem; }
  .status-dot { width: 10px; height: 10px; }
  .btn, .link-card { min-height: 44px; }           /* Apple HIG tap size */
  .btn.btn-primary { padding: .6rem .9rem; }

  /* Grid cards become 1 column */
  .grid {
    display: grid;
    grid-template-columns: 1fr !important;
    gap: 1rem;
  }

  /* Link grid wraps cleanly without overflow */
  .link-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: .75rem;
  }
  .link-card { justify-content: center; }

  /* Bullet lists: reduce left padding on mobile */
  .feature-list { padding-left: 1rem; }
}

/* Prevent long URLs/text from causing sideways scroll */
*,
*:before,
*:after { min-width: 0; }
a, p, li, span { word-break: break-word; overflow-wrap: anywhere; }

/* Make sure images/videos never overflow the viewport */
img, video { max-width: 100%; height: auto; }

/* Status dot colors (if not already defined) */
.status-dot.online  { background: var(--success-color, #28a745); }
.status-dot.offline { background: var(--danger-color,  #dc3545); }

.device-tab {
    background: none;
    border: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all var(--transition-fast);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.device-tab:hover {
    color: var(--text-primary);
    background-color: var(--bg-tertiary);
}

.device-tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    background-color: var(--bg-tertiary);
}

.device-content {
    display: none;
}

.device-content.active {
    display: block;
}

/* Diagnostic Steps */
.diagnostic-steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.diagnostic-step {
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
}

.step-icon {
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.step-content h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.step-content p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* Issue Sections */
.issue-section {
    margin-bottom: var(--spacing-xl);
}

.issue-section:last-child {
    margin-bottom: 0;
}

.issue-section h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.solution-steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.solution-step {
    padding: var(--spacing-md);
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--primary-color);
}

.solution-step h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.solution-step p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin: 0;
}

/* Support Info */
.support-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.support-item {
    text-align: center;
    padding: var(--spacing-lg);
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.support-item i {
    font-size: var(--font-size-2xl);
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.support-item h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.support-item p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-sm);
}

.support-item ul {
    text-align: left;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin: 0;
    padding-left: var(--spacing-lg);
}

.support-item li {
    margin-bottom: var(--spacing-xs);
}