/* ================= DESIGN SYSTEM VARIABLES ================= */
:root {
    --bg-primary: #0a0c10;
    --bg-secondary: #11141b;
    --bg-card: rgba(22, 27, 35, 0.65);
    --bg-card-hover: rgba(30, 37, 48, 0.85);
    
    --border-color: rgba(255, 255, 255, 0.08);
    --border-color-active: rgba(139, 92, 246, 0.4);
    
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-disabled: #475569;
    
    --accent-purple: #8b5cf6;
    --accent-purple-glow: rgba(139, 92, 246, 0.25);
    --accent-emerald: #10b981;
    --accent-emerald-glow: rgba(16, 185, 129, 0.25);
    --accent-blue: #3b82f6;
    --accent-blue-glow: rgba(59, 130, 246, 0.25);
    --accent-danger: #ef4444;
    
    /* Dedicated Brands colors */
    --accent-rpi: #e30b5d;
    --accent-rpi-glow: rgba(227, 11, 93, 0.25);
    --accent-esp: #e67e22;
    --accent-esp-glow: rgba(230, 126, 34, 0.25);
    --accent-cyan: #06b6d4;
    --accent-cyan-glow: rgba(6, 182, 212, 0.25);
    --accent-amber: #f59e0b;
    --accent-amber-glow: rgba(245, 158, 11, 0.25);
    
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-code: 'JetBrains Mono', monospace;
    
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 72px;
    --header-height: 70px;
    --border-radius-lg: 16px;
    --border-radius-md: 10px;
    --border-radius-sm: 6px;
    --shadow-main: 0 8px 32px 0 rgba(0, 0, 0, 0.5);
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --topbar-bg: rgba(10, 12, 16, 0.8);
    --scrollbar-thumb: rgba(255, 255, 255, 0.1);
    --scrollbar-thumb-hover: rgba(255, 255, 255, 0.2);
    --code-bg: #05070a;
    --input-bg: rgba(0, 0, 0, 0.2);
    --input-border: rgba(255, 255, 255, 0.1);
    --modal-overlay: rgba(0, 0, 0, 0.7);
}

/* ================= LIGHT THEME ================= */
[data-theme="light"] {
    --bg-primary: #f0f2f5;
    --bg-secondary: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.85);
    --bg-card-hover: rgba(240, 243, 248, 0.95);
    
    --border-color: rgba(0, 0, 0, 0.1);
    --border-color-active: rgba(139, 92, 246, 0.5);
    
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-disabled: #94a3b8;
    
    --accent-purple: #7c3aed;
    --accent-purple-glow: rgba(124, 58, 237, 0.15);
    --accent-emerald: #059669;
    --accent-emerald-glow: rgba(5, 150, 105, 0.15);
    --accent-blue: #2563eb;
    --accent-blue-glow: rgba(37, 99, 235, 0.15);
    --accent-danger: #dc2626;
    
    --accent-rpi: #be1252;
    --accent-rpi-glow: rgba(190, 18, 82, 0.12);
    --accent-esp: #c2660a;
    --accent-esp-glow: rgba(194, 102, 10, 0.12);
    --accent-cyan: #0891b2;
    --accent-cyan-glow: rgba(8, 145, 178, 0.12);
    --accent-amber: #d97706;
    --accent-amber-glow: rgba(217, 119, 6, 0.12);
    
    --topbar-bg: rgba(255, 255, 255, 0.85);
    --shadow-main: 0 8px 32px 0 rgba(0, 0, 0, 0.08);
    --scrollbar-thumb: rgba(0, 0, 0, 0.12);
    --scrollbar-thumb-hover: rgba(0, 0, 0, 0.2);
    --code-bg: #f8fafc;
    --input-bg: rgba(0, 0, 0, 0.03);
    --input-border: rgba(0, 0, 0, 0.12);
    --modal-overlay: rgba(0, 0, 0, 0.4);
}

/* ================= BASE STYLES & RESET ================= */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    overflow: hidden;
    height: 100vh;
    -webkit-font-smoothing: antialiased;
    transition: background-color 0.4s ease, color 0.4s ease;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--scrollbar-thumb-hover);
}

/* ================= LAYOUT ================= */
.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Sidebar Styling */
.sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 10;
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                min-width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.sidebar-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px 0 24px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: var(--text-primary);
}

.brand-icon {
    color: var(--accent-purple);
    font-size: 1.5rem;
    filter: drop-shadow(0 0 8px var(--accent-purple-glow));
}

.sidebar-nav {
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    border-radius: var(--border-radius-md);
    transition: var(--transition-smooth);
}

.nav-item i {
    font-size: 1.15rem;
    width: 20px;
    text-align: center;
}

.nav-item:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.03);
}

.nav-item.active {
    color: var(--text-primary);
    background-color: var(--accent-purple-glow);
    border-left: 3px solid var(--accent-purple);
    font-weight: 600;
}

.sidebar-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.host-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

/* Sidebar Collapse Toggle Button */
.sidebar-collapse-btn {
    background: none;
    border: 1px solid transparent;
    color: var(--text-secondary);
    width: 32px;
    height: 32px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    transition: var(--transition-smooth);
    flex-shrink: 0;
}
.sidebar-collapse-btn:hover {
    color: var(--text-primary);
    background-color: rgba(139, 92, 246, 0.1);
    border-color: rgba(139, 92, 246, 0.2);
}

/* Sidebar Expand (hamburger) in topbar — hidden when sidebar is open */
.sidebar-expand-btn {
    display: none;
    background: none;
    border: 1px solid transparent;
    color: var(--text-secondary);
    width: 38px;
    height: 38px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: var(--transition-smooth);
}
.sidebar-expand-btn:hover {
    color: var(--text-primary);
    background-color: rgba(139, 92, 246, 0.1);
    border-color: rgba(139, 92, 246, 0.2);
}

/* Collapsed sidebar state */
.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
    min-width: var(--sidebar-collapsed-width);
}
.sidebar.collapsed .brand-text,
.sidebar.collapsed .nav-item span,
.sidebar.collapsed .sidebar-label,
.sidebar.collapsed .sidebar-collapse-btn {
    opacity: 0;
    width: 0;
    overflow: hidden;
    white-space: nowrap;
    transition: opacity 0.15s ease, width 0.2s ease;
}
.sidebar.collapsed .brand {
    justify-content: center;
}
.sidebar.collapsed .sidebar-header {
    justify-content: center;
    padding: 0;
}
.sidebar.collapsed .nav-item {
    justify-content: center;
    padding: 12px 0;
    gap: 0;
}
.sidebar.collapsed .sidebar-nav {
    padding: 24px 12px;
    align-items: center;
}
.sidebar.collapsed .sidebar-footer {
    padding: 16px 0;
    justify-content: center;
    display: flex;
}
.sidebar.collapsed .host-badge {
    justify-content: center;
}
.sidebar.collapsed .nav-item.active {
    border-left: none;
    border-bottom: 3px solid var(--accent-purple);
}
.sidebar.collapsed + .main-content .sidebar-expand-btn {
    display: flex;
}

/* Top bar left group */
.top-bar-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Theme Toggle Button */
.theme-toggle-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}
.theme-toggle-btn:hover {
    color: var(--accent-amber);
    border-color: rgba(245, 158, 11, 0.3);
    background-color: rgba(245, 158, 11, 0.08);
    transform: rotate(15deg);
}
.theme-toggle-btn i {
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.theme-toggle-btn:active i {
    transform: rotate(360deg);
}

/* Main Content Styling */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

/* Top bar navigation */
.top-bar {
    height: var(--header-height);
    background-color: var(--topbar-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
    z-index: 5;
}

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

.top-bar h1 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
}

.status-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    padding: 6px 12px;
    border-radius: 20px;
    background-color: rgba(255, 255, 255, 0.04);
}

.status-online .dot {
    width: 8px;
    height: 8px;
    background-color: var(--accent-emerald);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--accent-emerald-glow);
}

.status-offline .dot {
    width: 8px;
    height: 8px;
    background-color: var(--accent-danger);
    border-radius: 50%;
    box-shadow: 0 0 8px rgba(239, 68, 68, 0.4);
}

/* Content Panel */
.content-panel {
    flex: 1;
    overflow-y: auto;
    padding: 32px;
}

/* ================= COMPONENTS & SPA PAGES ================= */
.spa-page {
    display: none;
}

.spa-page.active-page {
    display: block;
    animation: fadeIn 0.4s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.action-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.action-header h2 {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 600;
}

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

/* ================= TYPOGRAPHY & BUTTONS ================= */
h2, h3, h4 {
    font-family: var(--font-heading);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    padding: 10px 20px;
    border-radius: var(--border-radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.8rem;
    border-radius: var(--border-radius-sm);
}

.btn-primary {
    background-color: var(--accent-purple);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.2);
}
.btn-primary:hover {
    background-color: #7c3aed;
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(139, 92, 246, 0.35);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}
.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* Search Internet button — same look as btn-secondary but separate class
   so the global .btn-secondary close-modal listener does NOT catch it */
.btn-search-internet {
    background-color: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}
.btn-search-internet:hover {
    background-color: rgba(139, 92, 246, 0.15);
    border-color: var(--accent-purple);
    color: var(--accent-purple);
}

.btn-success {
    background-color: var(--accent-emerald);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
}
.btn-success:hover:not(:disabled) {
    background-color: #059669;
    transform: translateY(-1px);
}
.btn-success:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-danger {
    background-color: var(--accent-danger);
    color: #ffffff;
}
.btn-danger:hover {
    background-color: #dc2626;
}

/* ================= HOME LANDING PAGE ================= */
.welcome-banner {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.15) 0%, rgba(59, 130, 246, 0.05) 100%);
    border: 1px solid var(--border-color);
    padding: 24px 32px;
    border-radius: var(--border-radius-lg);
    margin-bottom: 32px;
}

.welcome-banner h2 {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: #ffffff;
}

.welcome-banner p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    max-width: 800px;
}

/* Landing Cards Hub Grid */
.hub-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

@media (max-width: 900px) {
    .hub-grid {
        grid-template-columns: 1fr;
    }
}

.hub-card {
    background-color: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 28px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 16px;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.hub-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.hub-card-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
}

.rpi-bg { background-color: rgba(227, 11, 93, 0.12); color: var(--accent-rpi); }
.esp-bg { background-color: rgba(230, 126, 34, 0.12); color: var(--accent-esp); }
.gadget-bg { background-color: rgba(16, 185, 129, 0.12); color: var(--accent-emerald); }
.comp-bg { background-color: rgba(6, 182, 212, 0.12); color: var(--accent-cyan); }
.guide-bg { background-color: rgba(245, 158, 11, 0.12); color: var(--accent-amber); }

.hub-card-count {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 800;
    line-height: 1;
}

.hub-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: #ffffff;
}

.hub-card p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.6;
    flex: 1;
}

.hub-card-link {
    font-size: 0.85rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition-smooth);
    margin-top: 8px;
}

/* Card Glow Hover effects */
.rpi-glow:hover {
    transform: translateY(-4px);
    border-color: rgba(227, 11, 93, 0.4);
    box-shadow: 0 10px 30px var(--accent-rpi-glow);
}
.rpi-glow:hover .hub-card-link { color: var(--accent-rpi); }

.esp-glow:hover {
    transform: translateY(-4px);
    border-color: rgba(230, 126, 34, 0.4);
    box-shadow: 0 10px 30px var(--accent-esp-glow);
}
.esp-glow:hover .hub-card-link { color: var(--accent-esp); }

.gadget-glow:hover {
    transform: translateY(-4px);
    border-color: rgba(16, 185, 129, 0.4);
    box-shadow: 0 10px 30px var(--accent-emerald-glow);
}
.gadget-glow:hover .hub-card-link { color: var(--accent-emerald); }

.comp-glow:hover {
    transform: translateY(-4px);
    border-color: rgba(6, 182, 212, 0.4);
    box-shadow: 0 10px 30px var(--accent-cyan-glow);
}
.comp-glow:hover .hub-card-link { color: var(--accent-cyan); }

.guide-glow:hover {
    transform: translateY(-4px);
    border-color: rgba(245, 158, 11, 0.4);
    box-shadow: 0 10px 30px var(--accent-amber-glow);
}
.guide-glow:hover .hub-card-link { color: var(--accent-amber); }

.comp-card-hover:hover {
    border-color: rgba(6, 182, 212, 0.4);
    box-shadow: 0 8px 24px rgba(6, 182, 212, 0.12);
}

.mounting-badge {
    font-size: 0.75rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 12px;
}

.mounting-smd {
    background-color: rgba(6, 182, 212, 0.15);
    color: #22d3ee;
    border: 1px solid rgba(6, 182, 212, 0.3);
}

.mounting-tht {
    background-color: rgba(139, 92, 246, 0.15);
    color: #a78bfa;
    border: 1px solid rgba(139, 92, 246, 0.3);
}

/* Dashboard Columns Layout */
.dashboard-sections {
    display: grid;
    grid-template-columns: 1fr 1.25fr;
    gap: 32px;
}

@media (max-width: 1024px) {
    .dashboard-sections {
        grid-template-columns: 1fr;
    }
}

.dashboard-card {
    background-color: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 24px;
    display: flex;
    flex-direction: column;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.card-header h2 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Stat lists inside dashboard */
.stats-mini-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 8px 0;
}

.mini-stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background-color: rgba(255, 255, 255, 0.01);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
}

.mini-stat-item .m-label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.mini-stat-item .m-value {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--accent-purple);
}

/* Device lists inside dashboard */
.device-status-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.status-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background-color: rgba(255, 255, 255, 0.01);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
}

.row-board-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.board-type-icon {
    font-size: 1.2rem;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-sm);
}

.row-board-name {
    font-weight: 600;
    font-size: 0.95rem;
}

.row-board-ip {
    font-family: var(--font-code);
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

.row-status-btn {
    display: flex;
    align-items: center;
    gap: 12px;
}

.empty-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-align: center;
    padding: 32px;
    font-style: italic;
    width: 100%;
}

/* ================= MICROCONTROLLER DIRECTORIES (RPi & ESP) ================= */
.mcu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
}

.mcu-card {
    background-color: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.mcu-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.rpi-card-hover:hover {
    border-color: rgba(227, 11, 93, 0.4);
    box-shadow: 0 8px 24px rgba(227, 11, 93, 0.12);
}

.esp-card-hover:hover {
    border-color: rgba(230, 126, 34, 0.4);
    box-shadow: 0 8px 24px rgba(230, 126, 34, 0.12);
}

.mcu-image-container {
    height: 180px;
    background-color: rgba(0, 0, 0, 0.2);
    position: relative;
    border-bottom: 1px solid var(--border-color);
}

.mcu-image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.mcu-image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-disabled);
    font-size: 3rem;
}

.mcu-tag {
    position: absolute;
    top: 12px;
    left: 12px;
    background-color: rgba(10, 12, 16, 0.75);
    backdrop-filter: blur(6px);
    color: var(--text-primary);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 2;
}

/* Status indicator — now inline in the card header, not over the image */
.mcu-status-indicator {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.btn-ping-status {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 0.8rem;
    transition: var(--transition-smooth);
    padding: 0 !important;
}

.btn-ping-status:hover:not(:disabled) {
    background: var(--accent-purple);
    border-color: var(--accent-purple);
    color: #ffffff;
    box-shadow: 0 0 10px var(--accent-purple-glow);
    transform: rotate(30deg);
}

.btn-ping-status:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.mcu-card-content {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex: 1;
}

.mcu-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
}

.mcu-card-header h3 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
}


.mcu-meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.mcu-meta-item i {
    width: 16px;
    text-align: center;
}

.mcu-ip {
    font-family: var(--font-code);
    color: var(--accent-purple);
    font-weight: 500;
}

.mcu-specs-snippet {
    font-size: 0.85rem;
    line-height: 1.4;
    color: var(--text-secondary);
    margin-top: 4px;
}

.mcu-usb-devices {
    border-top: 1px solid var(--border-color);
    padding-top: 12px;
    margin-top: 12px;
}

.mcu-usb-devices-title {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-disabled);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.mcu-linked-gadgets {
    border-top: 1px solid var(--border-color);
    padding-top: 12px;
    margin-top: auto;
}

.mcu-linked-gadgets-title {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-disabled);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.linked-gadget-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.gadget-tag {
    font-size: 0.75rem;
    background-color: rgba(59, 130, 246, 0.08);
    color: #60a5fa;
    border: 1px solid rgba(59, 130, 246, 0.18);
    padding: 2px 8px;
    border-radius: 4px;
}

/* Monospaced Setup Guide (Pi) and Flash Config (ESP) Card Blocks */
.mcu-info-box-wrapper {
    margin-top: 12px;
    border-top: 1px solid var(--border-color);
    padding-top: 12px;
}

.mcu-info-box-title {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-disabled);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.mcu-info-box-btn {
    background: transparent;
    border: none;
    color: var(--accent-purple);
    cursor: pointer;
    font-size: 0.7rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 4px;
}
.mcu-info-box-btn:hover {
    text-decoration: underline;
}

.mcu-setup-logs {
    background-color: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-color);
    padding: 10px 14px;
    border-radius: var(--border-radius-md);
    font-size: 0.8rem;
    line-height: 1.5;
    max-height: 150px;
    overflow-y: auto;
    white-space: pre-wrap;
    color: #e2e8f0;
}

.mcu-code-frame {
    background-color: #05070a;
    border: 1px solid var(--border-color);
    padding: 12px;
    border-radius: var(--border-radius-md);
    font-family: var(--font-code);
    font-size: 0.78rem;
    line-height: 1.5;
    max-height: 160px;
    overflow-y: auto;
    overflow-x: auto;
    white-space: pre;
    color: #a7f3d0;
}

.mcu-card-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    padding: 12px 24px 24px;
    border-top: 1px solid var(--border-color);
}

/* ================= ADDON COMPONENTS & INV PAGE ================= */
.hub-tabs {
    display: flex;
    gap: 8px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 24px;
    padding-bottom: 1px;
}

.hub-tab {
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 600;
    padding: 10px 24px;
    cursor: pointer;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    gap: 8px;
}

.hub-tab:hover {
    color: var(--text-primary);
}

.hub-tab.active {
    color: var(--accent-purple);
    border-bottom-color: var(--accent-purple);
}

.hub-tab-section {
    display: none;
}

.hub-tab-section.active-section {
    display: block;
    animation: fadeIn 0.4s ease-in-out;
}

.gadgets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
    gap: 24px;
}

.gadget-card {
    background-color: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    display: flex;
    flex-direction: column;
    transition: var(--transition-smooth);
    overflow: hidden;
}

.gadget-card:hover {
    transform: translateY(-4px);
    border-color: rgba(59, 130, 246, 0.4);
    box-shadow: 0 8px 24px rgba(59, 130, 246, 0.15);
}

.gadget-image-container {
    height: 160px;
    background-color: rgba(0, 0, 0, 0.2);
    position: relative;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    overflow: hidden;
}

.gadget-image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.gadget-image-container:hover img {
    transform: scale(1.05);
}

.gadget-card-body {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.gadget-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.gadget-card-header h3 {
    font-size: 1.2rem;
    font-weight: 600;
}

.gadget-card-category {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 12px;
    color: var(--text-secondary);
}

.gadget-specs-area {
    font-size: 0.85rem;
    color: var(--text-secondary);
    background-color: rgba(0, 0, 0, 0.15);
    padding: 10px 14px;
    border-radius: var(--border-radius-md);
    line-clamp: 3;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
}

.gadget-details-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px 12px;
    font-size: 0.8rem;
    border-top: 1px solid var(--border-color);
    padding-top: 12px;
    margin-top: auto;
}

.gadget-detail-label {
    color: var(--text-disabled);
    text-transform: uppercase;
    font-size: 0.7rem;
    font-weight: 700;
    margin-bottom: 2px;
}

.gadget-detail-value {
    font-weight: 500;
}

/* Stock quantity stepper */
.stock-stepper {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2px 4px;
}

.stock-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    width: 22px;
    height: 22px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    transition: background 0.15s, color 0.15s;
    padding: 0;
    flex-shrink: 0;
}
.stock-btn:hover {
    background: rgba(255,255,255,0.1);
    color: var(--text-primary);
}
.stock-btn:active {
    background: rgba(139, 92, 246, 0.25);
    color: var(--accent-purple);
}

.stock-count {
    font-weight: 700;
    font-size: 0.95rem;
    min-width: 24px;
    text-align: center;
    display: inline-block;
    transition: transform 0.15s ease;
}

/* Component nested variants layout */
.variants-panel {
    border-top: 1px solid var(--border-color);
    padding: 12px 14px;
    background: rgba(0, 0, 0, 0.18);
    border-bottom: 1px solid var(--border-color);
}

.variants-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.variants-header h4 {
    margin: 0;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-disabled);
}

.variants-table-container {
    overflow-x: auto;
    margin-bottom: 8px;
}

.variants-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8rem;
    text-align: left;
    table-layout: fixed; /* Enforce column widths */
}

.variants-table th {
    color: var(--text-disabled);
    font-weight: 600;
    padding: 4px 4px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 0.72rem;
}

.variants-table td {
    padding: 6px 4px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    vertical-align: middle;
}

.variants-table .col-value {
    width: 21%;
}
.variants-table .col-code {
    width: 13%;
}
.variants-table .col-mount {
    width: 15%;
}
.variants-table .col-pkg {
    width: 15%;
}
.variants-table .col-size {
    width: 16%;
    font-size: 0.7rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.variants-table .col-stock {
    width: 15%;
}
.variants-table .col-actions {
    width: 5%;
    text-align: center;
}

/* Mini stepper for table rows */
.variants-table .stock-stepper {
    padding: 1px 3px;
    border-radius: 12px;
}
.variants-table .stock-btn {
    width: 18px;
    height: 18px;
    font-size: 0.6rem;
}
.variants-table .stock-count {
    font-size: 0.8rem;
    min-width: 18px;
}

/* Inline Quick-Add Variant Form */
.variants-quick-add {
    display: flex;
    gap: 4px;
    align-items: center;
    border-top: 1px dashed rgba(255, 255, 255, 0.08);
    padding-top: 8px;
    margin-top: 6px;
    flex-wrap: wrap;
}

.variants-quick-add input,
.variants-quick-add select {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 0.75rem;
    padding: 4px 6px;
    min-width: 0;
}

.variants-quick-add .qa-input-val {
    flex: 1.2;
    min-width: 50px;
}
.variants-quick-add .qa-input-code {
    flex: 0.7;
    min-width: 35px;
}
.variants-quick-add .qa-select-pkg {
    flex: 1.5;
    min-width: 85px;
}
.variants-quick-add .qa-input-pkg-custom {
    flex: 1.2;
    min-width: 60px;
}
.variants-quick-add .qa-input-size {
    flex: 0.8;
    min-width: 55px;
}
.variants-quick-add .qa-select-mount {
    flex: 0.9;
    min-width: 55px;
}
.variants-quick-add .qa-input-qty {
    width: 70px;
    min-width: 70px;
    text-align: center;
    flex-grow: 0;
    flex-shrink: 0;
}

.btn-quick-add {
    background: var(--accent-cyan);
    color: #000;
    border: none;
    border-radius: 4px;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: bold;
    transition: background-color 0.15s, transform 0.1s;
    flex-shrink: 0;
}

.btn-quick-add:hover {
    background: #00dfdf;
}

.btn-quick-add:active {
    transform: scale(0.92);
}

.btn-var-delete {
    background: none;
    border: none;
    color: var(--text-disabled);
    cursor: pointer;
    font-size: 0.75rem;
    padding: 4px;
    border-radius: 4px;
    transition: color 0.15s, background-color 0.15s;
}

.btn-var-delete:hover {
    color: var(--accent-danger);
    background-color: rgba(239, 68, 68, 0.1);
}

.variants-toggle-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    font-size: 0.8rem;
    padding: 4px 8px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: background 0.15s, color 0.15s;
}

.variants-toggle-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
}

.variants-toggle-btn i {
    transition: transform 0.2s ease;
}

.variants-toggle-btn.active i {
    transform: rotate(180deg);
}

/* Pinned components layout row */
.pinned-components-container {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    margin-bottom: 8px;
}

@media (max-width: 900px) {
    .pinned-components-container {
        gap: 16px;
    }
}

.gadget-card-main {
    display: flex;
    flex-direction: column;
}

/* Pinned cards layout: landscape with preview on the right */
@media (min-width: 601px) {
    .pinned-components-container .gadget-card-main {
        flex-direction: row-reverse;
        align-items: stretch;
    }
    .pinned-components-container .gadget-image-container {
        width: 260px; /* Make the preview wider to fit the image */
        height: auto;
        min-height: 160px;
        flex-shrink: 0;
        border-bottom: none !important;
        border-left: 1px solid var(--border-color) !important;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .pinned-components-container .gadget-card-body {
        flex: 1;
    }
}

.gadget-media-preview-container {
    border-top: 1px solid var(--border-color);
    padding-top: 12px;
}

.gadget-media-thumbnails {
    display: flex;
    gap: 8px;
    margin-top: 6px;
}

.media-thumbnail {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius-sm);
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    cursor: pointer;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    color: var(--text-disabled);
    transition: var(--transition-smooth);
}

.media-thumbnail:hover {
    border-color: var(--text-secondary);
    color: var(--text-primary);
}

.media-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.gadget-card-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    padding: 12px 20px 20px;
    border-top: 1px solid var(--border-color);
}

/* ================= PROJECTS PAGE ================= */
.projects-grid {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.project-card {
    background-color: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: var(--transition-smooth);
    overflow: hidden;
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: rgba(16, 185, 129, 0.4);
    box-shadow: 0 8px 24px rgba(16, 185, 129, 0.15);
}

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

.project-title {
    font-size: 1.25rem;
    font-weight: 700;
}

.project-status-tag {
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 20px;
}

.project-status-planning {
    background-color: rgba(245, 158, 11, 0.15);
    color: #fbbf24;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.project-status-inprogress {
    background-color: rgba(59, 130, 246, 0.15);
    color: #60a5fa;
    border: 1px solid rgba(59, 130, 246, 0.3);
}

.project-status-completed {
    background-color: rgba(16, 185, 129, 0.15);
    color: #34d399;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.project-card-body {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.project-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.project-mcu-assigned {
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 10px 14px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.mcu-assigned-label {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-disabled);
    text-transform: uppercase;
}

.mcu-assigned-name {
    font-size: 0.85rem;
    font-weight: 600;
}

.project-gadgets-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.project-gadgets-title {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-disabled);
    text-transform: uppercase;
}

.project-gadget-item {
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.project-gadget-item i {
    color: var(--accent-blue);
    font-size: 0.7rem;
}

.project-notes-area {
    border-top: 1px solid var(--border-color);
    padding-top: 12px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-style: italic;
}

.project-card-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    padding: 12px 20px 20px;
    border-top: 1px solid var(--border-color);
}

/* ================= DATA IMPORT / BACKUP PAGE ================= */
.backup-settings-card {
    background-color: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 32px;
    max-width: 680px;
    margin: 0 auto;
}

.backup-header {
    text-align: center;
    margin-bottom: 32px;
}

.backup-icon {
    font-size: 3rem;
    color: var(--accent-purple);
    margin-bottom: 16px;
    filter: drop-shadow(0 0 16px var(--accent-purple-glow));
}

.backup-header h2 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.backup-header p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.import-area {
    margin-bottom: 24px;
}

.dropzone {
    border: 2px dashed rgba(255, 255, 255, 0.15);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    text-align: center;
    background-color: rgba(255, 255, 255, 0.01);
    cursor: pointer;
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.dropzone:hover, .dropzone.active {
    border-color: var(--accent-purple);
    background-color: rgba(139, 92, 246, 0.03);
}

.dropzone-icon {
    font-size: 2.5rem;
    color: var(--text-disabled);
    transition: var(--transition-smooth);
}

.dropzone:hover .dropzone-icon {
    color: var(--accent-purple);
}

.file-info-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 12px 16px;
    margin-top: 16px;
    font-size: 0.9rem;
}

.file-name {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
}

.file-name i {
    color: var(--accent-purple);
}

.import-actions {
    display: flex;
    justify-content: center;
    margin-top: 24px;
}

.import-progress-container {
    margin-top: 24px;
    text-align: center;
}

.progress-bar-wrapper {
    width: 100%;
    height: 6px;
    background-color: rgba(255, 255, 255, 0.06);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 12px;
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    background-color: var(--accent-purple);
    box-shadow: 0 0 10px var(--accent-purple-glow);
    transition: width 0.1s linear;
}

.progress-status {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.import-results-card {
    margin-top: 32px;
    border-top: 1px solid var(--border-color);
    padding-top: 24px;
    animation: fadeIn 0.4s ease;
}

.import-results-card h3 {
    font-size: 1.2rem;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.results-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 24px;
}

.results-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9rem;
}

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

.results-table td.res-val {
    font-weight: 700;
    text-align: right;
    font-family: var(--font-code);
    color: var(--accent-purple);
}

/* ================= MODAL & FORM STYLING ================= */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 100;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.25s ease;
}

.modal.active {
    display: flex;
    opacity: 1;
}

.modal-content {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    width: 90%;
    max-width: 640px;
    box-shadow: var(--shadow-main);
    display: flex;
    flex-direction: column;
    max-height: 85vh;
    transform: scale(0.95);
    transition: transform 0.25s ease;
}

.modal.active .modal-content {
    transform: scale(1);
}

.glass {
    background: rgba(17, 20, 27, 0.85);
    backdrop-filter: blur(20px);
}

[data-theme="light"] .glass {
    background: rgba(255, 255, 255, 0.92);
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
}

.close-modal {
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-disabled);
    transition: var(--transition-smooth);
}
.close-modal:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
    overflow-y: auto;
    flex: 1;
    min-height: 0;
}

/* Forms inside modals must be flex-column to keep footer pinned */
.modal-content form {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

.scrollable-body {
    /* max-height handled by parent .modal-content max-height: 85vh */
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

.mini-content {
    max-width: 400px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 18px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.required {
    color: var(--accent-danger);
}

input[type="text"],
input[type="number"],
input[type="password"],
select,
textarea {
    font-family: var(--font-body);
    font-size: 0.9rem;
    padding: 12px 16px;
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    color: var(--text-primary);
    transition: var(--transition-smooth);
    width: 100%;
}

select option {
    background-color: #ffffff;
    color: #1e293b;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--accent-purple);
    background-color: rgba(255, 255, 255, 0.04);
    box-shadow: 0 0 8px var(--accent-purple-glow);
}

textarea {
    resize: vertical;
}

.code-editor {
    font-family: var(--font-code);
    font-size: 0.8rem;
    background-color: #05070a;
    color: #a7f3d0;
}

/* Image Upload & Preview */
.image-upload-wrapper {
    display: flex;
    gap: 16px;
    align-items: center;
}

.image-preview-box {
    width: 80px;
    height: 80px;
    border-radius: var(--border-radius-md);
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
    cursor: pointer;
}

.image-preview-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.preview-placeholder {
    font-size: 1.5rem;
    color: var(--text-disabled);
}

/* Triple Upload Grid for Gadgets */
.triple-upload-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 4px;
}

.upload-box-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.upload-box-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.triple-preview-box {
    width: 100%;
    aspect-ratio: 1;
    border-radius: var(--border-radius-md);
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    overflow: hidden;
    transition: var(--transition-smooth);
    position: relative;
}

.triple-preview-box:hover {
    border-color: var(--accent-purple);
    background-color: rgba(255, 255, 255, 0.04);
}

.triple-preview-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.triple-preview-box i {
    font-size: 1.5rem;
    color: var(--text-disabled);
}

.triple-upload-grid input[type="file"] {
    display: none;
}

/* Gadget list inside modal (checkbox list) */
.gadgets-check-list {
    background-color: rgba(0, 0, 0, 0.15);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 12px;
    max-height: 180px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.gadget-check-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    cursor: pointer;
}

.gadget-check-item input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent-purple);
}

/* Search Box Control */
.search-box {
    position: relative;
    width: 220px;
}

.search-box i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-disabled);
    font-size: 0.85rem;
}

.search-box input {
    padding-left: 36px;
}

.select-filter {
    width: 160px;
}

/* ================= LIGHTBOX MODAL ================= */
.lightbox-modal {
    background-color: rgba(5, 6, 8, 0.95);
    z-index: 200;
}

.close-lightbox {
    position: absolute;
    top: 24px;
    right: 32px;
    font-size: 2.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-smooth);
}
.close-lightbox:hover {
    color: var(--text-primary);
}

.lightbox-content {
    max-width: 85%;
    max-height: 80vh;
    object-fit: contain;
    border-radius: var(--border-radius-md);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.8);
    transform: scale(0.97);
    transition: transform 0.3s ease;
}

.lightbox-modal.active .lightbox-content {
    transform: scale(1);
}

.lightbox-caption {
    position: absolute;
    bottom: 40px;
    color: var(--text-secondary);
    font-size: 1rem;
    font-family: var(--font-heading);
    letter-spacing: 0.5px;
}

/* ================= HELP & GUIDES SECTION ================= */
.guides-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 32px;
    height: calc(100vh - var(--header-height) - 64px);
}

.guides-menu {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    overflow-y: auto;
    height: 100%;
}

.guide-menu-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--text-secondary);
    border-radius: var(--border-radius-md);
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-smooth);
    font-weight: 500;
    font-size: 0.9rem;
    border: 1px solid transparent;
}

.guide-menu-item:hover {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.02);
}

.guide-menu-item.active {
    color: var(--text-primary);
    background-color: var(--accent-amber-glow);
    border-color: rgba(245, 158, 11, 0.25);
    border-left: 3px solid var(--accent-amber);
    font-weight: 600;
}

.guide-display-panel {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 32px;
    overflow-y: auto;
    height: 100%;
    display: flex;
    flex-direction: column;
    gap: 24px;
    backdrop-filter: blur(10px);
}

.guide-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 16px;
    margin-bottom: 8px;
}

.guide-header h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 8px;
}

.guide-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
}

.guide-step {
    margin-bottom: 24px;
    background-color: rgba(255, 255, 255, 0.01);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 20px 24px;
}

.guide-step-title {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    font-weight: 600;
    font-size: 1.1rem;
    color: #ffffff;
}

.guide-step-number {
    background-color: var(--accent-amber-glow);
    color: var(--accent-amber);
    width: 26px;
    height: 26px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 700;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.guide-step p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 12px;
}

.code-block-wrapper {
    position: relative;
    margin: 12px 0;
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    background-color: #05070a;
    border: 1px solid var(--border-color);
}

.code-block-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: rgba(255, 255, 255, 0.02);
    padding: 8px 16px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

.code-block-body {
    padding: 16px;
    font-family: var(--font-code);
    font-size: 0.9rem;
    color: #e2e8f0;
    overflow-x: auto;
    white-space: pre;
    line-height: 1.5;
}

.code-copy-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition-smooth);
}

.code-copy-btn:hover {
    color: #ffffff;
}

.code-copy-btn i {
    font-size: 0.9rem;
}

.guide-warning-box {
    background-color: rgba(239, 68, 68, 0.05);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: var(--border-radius-sm);
    padding: 12px 16px;
    margin: 12px 0;
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.guide-warning-box i {
    color: var(--accent-danger);
    font-size: 1.1rem;
    margin-top: 2px;
}

.guide-warning-box div {
    font-size: 0.88rem;
    line-height: 1.5;
    color: var(--text-secondary);
}

.guide-warning-box strong {
    color: #ffffff;
}

/* ================= LIGHT THEME OVERRIDES ================= */
[data-theme="light"] .hub-card h3,
[data-theme="light"] .guide-header h2,
[data-theme="light"] .guide-step-title,
[data-theme="light"] .guide-warning-box strong,
[data-theme="light"] .modal-header h3,
[data-theme="light"] .action-header h2 {
    color: var(--text-primary);
}

[data-theme="light"] input[type="text"],
[data-theme="light"] input[type="number"],
[data-theme="light"] input[type="password"],
[data-theme="light"] select,
[data-theme="light"] textarea {
    background-color: var(--input-bg);
    border-color: var(--input-border);
}

[data-theme="light"] input:focus,
[data-theme="light"] select:focus,
[data-theme="light"] textarea:focus {
    background-color: #ffffff;
}

[data-theme="light"] .code-block-body {
    background-color: var(--code-bg);
    color: var(--text-primary);
}

[data-theme="light"] .code-block-header {
    background-color: rgba(0, 0, 0, 0.03);
}

[data-theme="light"] .code-block-wrapper {
    background-color: var(--code-bg);
    border-color: var(--input-border);
}

[data-theme="light"] .modal {
    background-color: var(--modal-overlay);
}

[data-theme="light"] .toast-popup {
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid rgba(0, 0, 0, 0.1);
    color: var(--text-primary);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
}

[data-theme="light"] .nav-item:hover {
    background-color: rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .guide-step {
    background-color: rgba(0, 0, 0, 0.02);
}

[data-theme="light"] .status-badge {
    background-color: rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .sidebar-collapse-btn:hover,
[data-theme="light"] .sidebar-expand-btn:hover {
    background-color: rgba(124, 58, 237, 0.08);
}

[data-theme="light"] .guide-warning-box {
    background-color: rgba(239, 68, 68, 0.06);
    border-color: rgba(239, 68, 68, 0.15);
}

[data-theme="light"] .lightbox-modal {
    background-color: rgba(255, 255, 255, 0.92);
}

[data-theme="light"] .mini-stat-item,
[data-theme="light"] .status-row {
    background-color: rgba(0, 0, 0, 0.02);
}

/* ================= MOBILE RESPONSIVE OVERRIDES ================= */

@media (max-width: 768px) {
    .app-container {
        position: relative;
    }
    
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        height: 100vh;
        width: var(--sidebar-width) !important;
        min-width: var(--sidebar-width) !important;
        transform: translateX(0);
        box-shadow: var(--shadow-main);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 100;
    }
    
    .sidebar.collapsed {
        transform: translateX(-100%);
        width: var(--sidebar-width) !important;
        min-width: var(--sidebar-width) !important;
    }
    
    /* When collapsed on mobile, prevent hide classes so it looks complete when expanded */
    .sidebar.collapsed .brand-text,
    .sidebar.collapsed .nav-item span,
    .sidebar.collapsed .sidebar-label,
    .sidebar.collapsed .sidebar-collapse-btn {
        opacity: 1 !important;
        width: auto !important;
        overflow: visible !important;
    }
    
    .sidebar.collapsed .brand {
        justify-content: space-between !important;
    }
    
    .sidebar.collapsed .sidebar-header {
        justify-content: space-between !important;
        padding: 0 16px 0 24px !important;
    }
    
    .sidebar.collapsed .nav-item {
        justify-content: flex-start !important;
        padding: 12px 16px !important;
        gap: 16px !important;
    }
    
    .sidebar.collapsed .sidebar-nav {
        padding: 24px 16px !important;
        align-items: stretch !important;
    }
    
    .sidebar.collapsed .sidebar-footer {
        padding: 16px 24px !important;
        justify-content: flex-start !important;
    }
    
    .sidebar-expand-btn {
        display: flex !important;
    }
    
    .main-content {
        width: 100vw;
        margin-left: 0;
    }
    
    .top-bar {
        padding: 0 16px;
    }
    
    .top-bar-left {
        min-width: 0;
        flex: 1;
    }
    
    .top-bar h1 {
        font-size: 1.2rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        min-width: 0;
    }
    
    .top-bar-actions {
        flex-shrink: 0;
        gap: 8px;
    }
    
    .status-badge .status-text {
        display: none;
    }
    
    .status-badge {
        padding: 8px;
        border-radius: 50%;
        width: 32px;
        height: 32px;
        justify-content: center;
    }
    
    .content-panel {
        padding: 16px 16px 120px 16px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    /* Make grids fit phone screens */
    .mcu-grid, .gadgets-grid, .projects-grid {
        grid-template-columns: 1fr !important;
    }
    
    .action-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .header-controls {
        width: 100%;
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-box, .select-filter, .btn {
        width: 100% !important;
    }
    
    .triple-upload-grid {
        gap: 8px;
    }
    
    .guides-layout {
        grid-template-columns: 1fr;
        height: auto;
    }
    
    .guides-menu {
        height: auto;
        max-height: 200px;
    }
    
    .guide-display-panel {
        height: auto;
        padding: 16px;
    }

    /* Home Screen Items Mobile Optimization */
    .welcome-banner {
        padding: 16px 20px;
        margin-bottom: 20px;
    }
    .welcome-banner h2 {
        font-size: 1.35rem;
    }
    .welcome-banner p {
        font-size: 0.85rem;
    }
    
    .hub-grid {
        gap: 14px;
        margin-bottom: 20px;
    }
    .hub-card {
        padding: 20px;
        gap: 10px;
    }
    .hub-card-icon {
        width: 42px;
        height: 42px;
        font-size: 1.3rem;
    }
    .hub-card-count {
        font-size: 1.8rem;
    }
    .hub-card h3 {
        font-size: 1.15rem;
    }
    .hub-card p {
        font-size: 0.82rem;
    }
    .hub-card-link {
        margin-top: 4px;
        font-size: 0.8rem;
    }

    .dashboard-sections {
        gap: 20px;
    }
    .dashboard-card {
        padding: 18px;
    }
    .card-header {
        margin-bottom: 14px;
        padding-bottom: 8px;
    }
    .card-header h2 {
        font-size: 1.1rem;
    }
    .mini-stat-item, .status-row {
        padding: 10px 14px;
    }
    .mini-stat-item .m-label {
        font-size: 0.82rem;
    }
    .mini-stat-item .m-value {
        font-size: 1.15rem;
    }
    .row-board-name {
        font-size: 0.88rem;
    }
    .board-type-icon {
        width: 30px;
        height: 30px;
        font-size: 1rem;
    }
    .row-board-ip {
        font-size: 0.82rem;
    }
}

/* ================= LOGIN OVERLAY ================= */
.login-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: var(--bg-primary);
    background-image: 
        radial-gradient(at 0% 0%, rgba(139, 92, 246, 0.1) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(59, 130, 246, 0.08) 0px, transparent 50%);
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.3s ease;
    padding: 20px;
}

.login-overlay.active {
    display: flex;
}

.login-box {
    width: 100%;
    max-width: 420px;
    background-color: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-main);
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.login-header {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.login-logo {
    font-size: 3rem;
    color: var(--accent-purple);
    filter: drop-shadow(0 0 12px var(--accent-purple-glow));
    margin-bottom: 8px;
}

.login-header h2 {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
}

.login-header p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.login-error-msg {
    display: flex;
    align-items: center;
    gap: 10px;
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.25);
    color: var(--accent-danger);
    padding: 12px 16px;
    border-radius: var(--border-radius-md);
    font-size: 0.85rem;
    font-weight: 500;
}

/* ================= USER MANAGEMENT TABLE ================= */
.users-table th {
    color: var(--text-secondary);
    font-weight: 600;
}

.users-table td, .users-table th {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-color);
}

.users-table tr:hover {
    background-color: rgba(255, 255, 255, 0.01);
}

.user-role-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 12px;
    text-transform: uppercase;
}

.role-admin {
    background-color: rgba(139, 92, 246, 0.15);
    color: #a78bfa;
    border: 1px solid rgba(139, 92, 246, 0.3);
}

.role-user {
    background-color: rgba(59, 130, 246, 0.15);
    color: #60a5fa;
    border: 1px solid rgba(59, 130, 246, 0.3);
}

/* ================= KICAD PARTS IMPORT STYLING ================= */
input[type="file"] {
    font-family: var(--font-body);
    font-size: 0.85rem;
    padding: 8px 12px;
    background-color: rgba(255, 255, 255, 0.02);
    border: 1px dashed var(--border-color);
    border-radius: var(--border-radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    width: 100%;
}
input[type="file"]::file-selector-button {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 4px 10px;
    margin-right: 8px;
    cursor: pointer;
    font-size: 0.75rem;
    font-weight: 500;
    transition: var(--transition-smooth);
}
input[type="file"]::file-selector-button:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.project-kicad-parts-section {
    border-top: 1px solid var(--border-color);
    padding-top: 14px;
    margin-top: 4px;
}

.kicad-parts-toggle-btn {
    width: 100%;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 0;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.kicad-parts-toggle-btn:hover {
    color: var(--accent-emerald);
}

.kicad-parts-toggle-btn i {
    font-size: 0.85rem;
}

.kicad-parts-toggle-btn .toggle-icon {
    transition: transform var(--transition-smooth);
}

.kicad-parts-toggle-btn.active .toggle-icon {
    transform: rotate(180deg);
}

.kicad-parts-container {
    max-height: 200px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    margin-top: 8px;
    background-color: rgba(0, 0, 0, 0.15);
}

.kicad-parts-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.75rem;
    text-align: left;
}

.kicad-parts-table th, 
.kicad-parts-table td {
    padding: 8px 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 140px;
}

.kicad-parts-table th {
    background-color: rgba(30, 41, 59, 0.8);
    backdrop-filter: blur(5px);
    color: var(--text-disabled);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.65rem;
    letter-spacing: 0.5px;
    position: sticky;
    top: 0;
    z-index: 1;
}

.kicad-parts-table tr:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

.part-link {
    color: var(--accent-blue);
    text-decoration: none;
}

.part-link:hover {
    text-decoration: underline;
}

/* Package Accordion Styling */
.pkg-accordion-header:hover {
    background: rgba(255, 255, 255, 0.06) !important;
}
.pkg-accordion-header:focus {
    outline: none;
}