/* ============================================================================
   MODERN WHITE & BLACK DESIGN SYSTEM
   ============================================================================
   A minimal, professional design framework for Networking Platform
   ============================================================================ */

/* ============================================================================
   CSS VARIABLES (Design Tokens)
   ============================================================================ */
:root {
    /* Colors - Black & White Theme */
    --color-black: #000000;
    --color-black-soft: #1a1a1a;
    --color-gray-dark: #2d2d2d;
    --color-gray: #666666;
    --color-gray-light: #999999;
    --color-gray-lighter: #cccccc;
    --color-gray-lightest: #e5e5e5;
    --color-white: #ffffff;
    --color-white-off: #fafafa;
    
    /* Accent (minimal, for interactive elements) */
    --color-accent: #000000;
    --color-accent-hover: #333333;
    
    /* Status Colors (subtle) */
    --color-success: #000000;
    --color-error: #cc0000;
    --color-warning: #666666;
    --color-info: #333333;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    --font-family-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', 'Droid Sans Mono', monospace;
    
    --font-size-xs: 0.75rem;    /* 12px */
    --font-size-sm: 0.875rem;   /* 14px */
    --font-size-base: 1rem;     /* 16px */
    --font-size-lg: 1.125rem;    /* 18px */
    --font-size-xl: 1.25rem;     /* 20px */
    --font-size-2xl: 1.5rem;     /* 24px */
    --font-size-3xl: 1.875rem;   /* 30px */
    --font-size-4xl: 2.25rem;    /* 36px */
    
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* Spacing Scale */
    --spacing-xs: 0.25rem;   /* 4px */
    --spacing-sm: 0.5rem;    /* 8px */
    --spacing-md: 1rem;      /* 16px */
    --spacing-lg: 1.5rem;    /* 24px */
    --spacing-xl: 2rem;      /* 32px */
    --spacing-2xl: 3rem;     /* 48px */
    --spacing-3xl: 4rem;     /* 64px */
    
    /* Layout */
    --max-width-sm: 640px;
    --max-width-md: 768px;
    --max-width-lg: 1024px;
    --max-width-xl: 1280px;
    --max-width-2xl: 1536px;
    
    --container-padding: 1.5rem;
    --container-padding-lg: 2rem;
    
    /* Borders */
    --border-width: 1px;
    --border-width-thick: 2px;
    --border-radius-sm: 0.25rem;   /* 4px */
    --border-radius: 0.5rem;       /* 8px */
    --border-radius-lg: 0.75rem;    /* 12px */
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --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;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    
    /* Z-index scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-black);
    background-color: var(--color-white-off);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ============================================================================
   TYPOGRAPHY
   ============================================================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--color-black);
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.02em;
}

h2 {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-semibold);
    letter-spacing: -0.01em;
}

h3 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
}

h4 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
}

h5 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
}

h6 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-gray-dark);
}

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

a:hover {
    color: var(--color-gray);
    text-decoration: underline;
}

/* ============================================================================
   LAYOUT SYSTEM
   ============================================================================ */
.wrapper {
    width: 100%;
    max-width: var(--max-width-xl);
    margin: 0 auto;
    padding: var(--container-padding);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.wrapper-narrow {
    max-width: var(--max-width-sm);
}

.wrapper-wide {
    max-width: var(--max-width-2xl);
}

.container {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    padding: var(--container-padding-lg);
    flex: 1;
}

/* ============================================================================
   MODERN SIDEBAR LAYOUT
   ============================================================================ */
.app-layout {
    display: flex;
    flex: 1;
    background: var(--color-white-off);
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--color-white);
    border-right: var(--border-width) solid var(--color-gray-lightest);
    display: flex;
    flex-direction: column;
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 1060; /* Highest priority - above backdrop and autocomplete */
    overflow-y: auto;
    will-change: transform; /* Performance optimization */
}

.sidebar-header {
    padding: var(--spacing-xl) var(--spacing-lg);
    border-bottom: var(--border-width) solid var(--color-gray-lightest);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--color-black);
}

.sidebar-logo {
    width: 40px;
    height: 40px;
    background: var(--color-black);
    color: var(--color-white);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-xl);
}

.sidebar-logos-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    width: 100%;
}

.sidebar-logo-img {
    height: 48px;
    width: auto;
    max-width: 45%;
    background: white;
    padding: 4px;
    border-radius: 4px;
    object-fit: contain;
    flex: 1;
}

@media (max-width: 768px) {
    .sidebar-logo-img {
        height: 40px; /* Smaller on mobile */
    }
}

.sidebar-brand-text {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.02em;
}

.sidebar-nav {
    flex: 1;
    padding: var(--spacing-lg) 0;
    overflow-y: auto;
}

.nav-section {
    margin-bottom: var(--spacing-xl);
}

.nav-section-label {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-gray);
    padding: 0 var(--spacing-lg) var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-lg);
    color: var(--color-gray-dark);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: var(--color-white-off);
    color: var(--color-black);
    border-left-color: var(--color-gray-lighter);
}

.nav-item.active {
    background: var(--color-black);
    color: var(--color-white);
    border-left-color: var(--color-black);
    font-weight: var(--font-weight-semibold);
}

.nav-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    color: inherit;
}

.nav-icon svg {
    width: 100%;
    height: 100%;
    stroke: currentColor;
    fill: none;
}

.nav-text {
    flex: 1;
}

/* Main Content Area */
.main-content {
    flex: 1;
    margin-left: 260px;
    display: flex;
    flex-direction: column;
}

/* Top Header */
.top-header {
    background: var(--color-white);
    border-bottom: var(--border-width) solid var(--color-gray-lightest);
    padding: var(--spacing-lg) var(--spacing-xl);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
}

.header-left {
    flex: 1;
}

.page-title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-black);
    margin: 0 0 var(--spacing-xs) 0;
    letter-spacing: -0.02em;
}

.page-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-gray);
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.header-right {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

/* Page Content */
.page-content {
    flex: 1;
    padding: var(--spacing-xl);
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
}

/* Badge Inline */
.badge-inline {
    display: inline-block;
    padding: 2px 8px;
    background: var(--color-black);
    color: var(--color-white);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--border-radius-sm);
}

/* ============================================================================
   LEGACY NAVIGATION (for public pages)
   ============================================================================ */
.navbar {
    background: var(--color-white);
    border-bottom: var(--border-width) solid var(--color-gray-lightest);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.95);
}

.navbar-content {
    max-width: var(--max-width-xl);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-black);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.navbar-brand:hover {
    text-decoration: none;
    color: var(--color-black);
}

.navbar-nav {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
    list-style: none;
}

.navbar-link {
    color: var(--color-gray-dark);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: color var(--transition-fast);
}

.navbar-link:hover {
    color: var(--color-black);
    text-decoration: none;
}

.navbar-link.active {
    color: var(--color-black);
    font-weight: var(--font-weight-semibold);
}

/* ============================================================================
   BUTTONS
   ============================================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    line-height: 1;
    text-align: center;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: var(--border-width-thick) solid var(--color-black);
    border-radius: var(--border-radius);
    background: var(--color-white);
    color: var(--color-black);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
    user-select: none;
}

.btn:hover {
    background: var(--color-black);
    color: var(--color-white);
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn:disabled:hover {
    background: var(--color-white);
    color: var(--color-black);
    box-shadow: none;
}

/* Button Variants */
.btn-primary {
    background: var(--color-black);
    color: var(--color-white);
    border-color: var(--color-black);
}

.btn-primary:hover {
    background: var(--color-gray-dark);
    border-color: var(--color-gray-dark);
    color: var(--color-white);
}

.btn-secondary {
    background: var(--color-white);
    color: var(--color-black);
    border-color: var(--color-gray-lighter);
}

.btn-secondary:hover {
    background: var(--color-white-off);
    border-color: var(--color-black);
    color: var(--color-black);
}

.btn-danger {
    background: var(--color-white);
    color: var(--color-error);
    border-color: var(--color-error);
}

.btn-danger:hover {
    background: var(--color-error);
    color: var(--color-white);
    border-color: var(--color-error);
}

.btn-ghost {
    background: transparent;
    border-color: transparent;
    color: var(--color-gray-dark);
}

.btn-ghost:hover {
    background: var(--color-white-off);
    color: var(--color-black);
    border-color: transparent;
}

/* Button Sizes */
.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
}

/* ============================================================================
   FORMS
   ============================================================================ */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-black);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    line-height: var(--line-height-normal);
    color: var(--color-black);
    background: var(--color-white);
    border: var(--border-width) solid var(--color-gray-lightest);
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-black);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.05);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-gray-light);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-checkbox,
.form-radio {
    width: 18px;
    height: 18px;
    margin-right: var(--spacing-sm);
    cursor: pointer;
    accent-color: var(--color-black);
}

.form-checkbox-label,
.form-radio-label {
    display: flex;
    align-items: center;
    font-size: var(--font-size-base);
    color: var(--color-gray-dark);
    cursor: pointer;
}

.form-help {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-gray);
}

.form-error {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-error);
}

/* ============================================================================
   CARDS
   ============================================================================ */
.card {
    background: var(--color-white);
    border: var(--border-width) solid var(--color-gray-lightest);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-gray-lighter);
}

.card-header {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: var(--border-width) solid var(--color-gray-lightest);
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-black);
    margin-bottom: 0;
}

.card-body {
    color: var(--color-gray-dark);
}

.card-footer {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: var(--border-width) solid var(--color-gray-lightest);
}

/* ============================================================================
   ALERTS / FLASH MESSAGES
   ============================================================================ */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border-left: 4px solid;
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-sm);
}

.alert-success {
    background: var(--color-white-off);
    border-color: var(--color-success);
    color: var(--color-black);
}

.alert-error {
    background: var(--color-white-off);
    border-color: var(--color-error);
    color: var(--color-error);
}

.alert-warning {
    background: var(--color-white-off);
    border-color: var(--color-warning);
    color: var(--color-gray-dark);
}

.alert-info {
    background: var(--color-white-off);
    border-color: var(--color-info);
    color: var(--color-gray-dark);
}

/* ============================================================================
   TABLES
   ============================================================================ */
.table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.table thead {
    border-bottom: var(--border-width-thick) solid var(--color-black);
}

.table th {
    text-align: left;
    padding: var(--spacing-md);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: var(--font-size-xs);
    color: var(--color-black);
}

.table td {
    padding: var(--spacing-md);
    border-bottom: var(--border-width) solid var(--color-gray-lightest);
    color: var(--color-gray-dark);
}

.table tbody tr:hover {
    background: var(--color-white-off);
}

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

/* ============================================================================
   UTILITIES
   ============================================================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }

.font-normal { font-weight: var(--font-weight-normal); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

.text-black { color: var(--color-black); }
.text-gray-dark { color: var(--color-gray-dark); }
.text-gray { color: var(--color-gray); }
.text-gray-light { color: var(--color-gray-light); }

.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.p-xs { padding: var(--spacing-xs); }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

.hidden { display: none; }
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ============================================================================
   MOBILE MENU SYSTEM
   ============================================================================ */
.mobile-menu-toggle {
    display: none; /* Hidden on desktop */
    background: none;
    border: none;
    padding: var(--spacing-sm);
    cursor: pointer;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    width: 44px;
    height: 44px;
    margin-right: var(--spacing-md);
    flex-shrink: 0;
}

.hamburger-line {
    width: 24px;
    height: 2px;
    background: var(--color-black);
    transition: all var(--transition-base);
    border-radius: 1px;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

.sidebar-backdrop {
    display: none; /* Hidden on desktop */
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1050; /* Higher than autocomplete (1000) but below sidebar */
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
}

.sidebar-backdrop.active {
    opacity: 1;
    pointer-events: all;
}

body.menu-open {
    overflow: hidden; /* Prevent background scroll when menu is open */
}

/* ============================================================================
   RESPONSIVE
   ============================================================================ */
@media (max-width: 1024px) {
    .mobile-menu-toggle {
        display: flex !important; /* Show hamburger on tablet and mobile */
        z-index: 1070; /* Above sidebar */
    }
    
    .sidebar-backdrop {
        display: block !important; /* Show backdrop on tablet and mobile */
    }
    
    .sidebar {
        transform: translateX(-100%) !important;
        transition: transform 0.3s ease;
        box-shadow: var(--shadow-xl);
    }
    
    .sidebar.open {
        transform: translateX(0) !important;
    }
    
    .main-content {
        margin-left: 0 !important;
    }
    
    .page-content {
        padding: var(--spacing-md);
    }
    
    .header-left {
        display: flex;
        align-items: center;
        gap: var(--spacing-md);
    }
    
    /* Ensure sidebar header doesn't overflow */
    .sidebar-header {
        padding: var(--spacing-md) var(--spacing-lg);
        min-height: auto;
    }
    
    /* Reduce logo size on tablet/mobile */
    .sidebar-logo-img {
        height: 40px !important;
        max-width: 45% !important;
    }
    
    .sidebar-logos-container {
        gap: var(--spacing-xs);
    }
    
    /* Ensure nav items are visible */
    .sidebar-nav {
        padding: var(--spacing-md) 0;
    }
    
    .nav-item {
        padding: var(--spacing-md) var(--spacing-lg);
        min-height: 48px;
    }
}

@media (max-width: 768px) {
    :root {
        --container-padding: 1rem;
        --container-padding-lg: 1.5rem;
    }
    
    h1 { font-size: var(--font-size-3xl); }
    h2 { font-size: var(--font-size-2xl); }
    h3 { font-size: var(--font-size-xl); }
    
    .page-title {
        font-size: var(--font-size-2xl);
    }
    
    /* Ensure sidebar is hidden on mobile by default */
    .sidebar {
        transform: translateX(-100%) !important;
    }
    
    .sidebar.open {
        transform: translateX(0) !important;
    }
    
    /* Smaller logo on mobile */
    .sidebar-logo-img {
        height: 36px !important;
        max-width: 45% !important;
    }
    
    .sidebar-logos-container {
        gap: var(--spacing-xs);
    }
    
    /* Compact sidebar header on mobile */
    .sidebar-header {
        padding: var(--spacing-sm) var(--spacing-md) !important;
    }
    
    /* Ensure hamburger button is visible and clickable */
    .mobile-menu-toggle {
        display: flex !important;
        z-index: 1070;
        position: relative;
    }
    
    .navbar-nav {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    /* Wrapper: full width on mobile with padding */
    .wrapper-narrow {
        max-width: 100%;
        width: 100%;
    }
    
    /* Buttons: Only full-width when in action groups, not standalone */
    .action-buttons .btn,
    .member-card-actions .btn {
        width: 100%;
    }
    
    /* Standalone buttons keep auto width for better UX */
    .btn:not(.action-buttons .btn):not(.member-card-actions .btn) {
        width: auto;
        min-width: 44px; /* Ensure touch target */
        padding: 12px 20px; /* Better touch target */
    }
    
    .header-content {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
    
    .header-right {
        width: 100%;
        flex-wrap: wrap;
    }
    
    /* Improve touch targets */
    .nav-item {
        min-height: 44px;
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    /* Form inputs: ensure 16px font to prevent iOS zoom */
    .form-input,
    .form-select,
    .form-textarea {
        font-size: 16px;
        padding: 12px var(--spacing-md);
        min-height: 44px;
    }
    
    /* Checkboxes and radios: larger touch targets on mobile */
    .form-checkbox,
    .form-radio {
        width: 44px;
        height: 44px;
        min-width: 44px;
        min-height: 44px;
        margin-right: var(--spacing-md);
    }
    
    .form-checkbox-label,
    .form-radio-label {
        min-height: 44px;
        padding: var(--spacing-xs) 0;
    }
    
    /* Buttons: ensure minimum touch target */
    .btn-sm {
        min-height: 44px;
        padding: 12px 16px;
    }
    
    /* Form sections: reduce spacing on mobile */
    .form-section {
        margin-bottom: var(--spacing-lg);
    }
    
    .form-group {
        margin-bottom: var(--spacing-md);
    }
    
    /* Reduce header padding on mobile */
    .top-header {
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    /* Reduce page content padding on mobile */
    .page-content {
        padding: var(--spacing-md);
    }
    
    /* Cards: reduce padding on mobile */
    .card {
        padding: var(--spacing-md);
    }
    
    /* Container: reduce padding on mobile */
    .container {
        padding: var(--spacing-md);
    }
    
    /* Wrapper: reduce padding on mobile */
    .wrapper {
        padding: var(--spacing-md);
    }
    
    /* Settings sections: reduce spacing */
    .settings-section {
        padding-bottom: var(--spacing-lg);
    }
    
    /* Form textarea: better mobile sizing */
    .form-textarea {
        min-height: 100px;
        font-size: 16px !important; /* Prevent iOS zoom */
        padding: 12px var(--spacing-md) !important;
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
    }
    
    /* Ensure ALL form inputs are properly sized on mobile */
    input[type="text"],
    input[type="email"],
    input[type="password"],
    input[type="number"],
    input[type="tel"],
    input[type="url"],
    input[type="search"],
    input[type="date"],
    input[type="time"],
    input[type="datetime-local"],
    textarea,
    select {
        font-size: 16px !important; /* Prevent iOS zoom */
        min-height: 44px !important; /* Touch-friendly */
        padding: 12px var(--spacing-md) !important;
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
    }
    
    /* Ensure all buttons are touch-friendly */
    button,
    .btn,
    input[type="submit"],
    input[type="button"],
    input[type="reset"],
    a.btn {
        min-height: 44px !important;
        min-width: 44px !important;
        padding: 12px 20px !important;
        font-size: var(--font-size-base) !important;
        box-sizing: border-box !important;
    }
    
    /* Make all buttons full-width in forms on mobile */
    form .btn,
    form button,
    form input[type="submit"],
    form input[type="button"] {
        width: 100% !important;
    }
    
    /* Ensure tables are responsive */
    table {
        width: 100% !important;
        max-width: 100% !important;
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    /* Ensure all containers are responsive */
    .container,
    .wrapper,
    .wrapper-narrow,
    .wrapper-wide {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
    }
    
    /* Ensure cards and boxes are responsive */
    .card,
    .event-card,
    .channel-card,
    .user-card,
    .stat-card {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
    }
    
    /* Prevent horizontal scrolling */
    body {
        overflow-x: hidden !important;
        max-width: 100vw !important;
    }
    
    /* Ensure main content is responsive */
    .main-content {
        width: 100% !important;
        max-width: 100% !important;
        margin-left: 0 !important;
    }
    
    /* Better scroll behavior for forms */
    html {
        scroll-behavior: smooth;
    }
    
    /* Ensure page content doesn't overflow */
    .page-content {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
    }
}

/* Very small phones (iPhone SE, etc.) */
@media (max-width: 480px) {
    :root {
        --container-padding: 0.75rem;
        --container-padding-lg: 1rem;
    }
    
    .wrapper,
    .container {
        padding: var(--spacing-sm) !important;
    }
    
    .form-section {
        margin-bottom: var(--spacing-md);
    }
    
    h1 { font-size: var(--font-size-2xl); }
    h2 { font-size: var(--font-size-xl); }
    h3 { font-size: var(--font-size-lg); }
    
    .page-title {
        font-size: var(--font-size-xl) !important;
    }
    
    /* Even smaller inputs and buttons on very small phones */
    input[type="text"],
    input[type="email"],
    input[type="password"],
    input[type="number"],
    input[type="tel"],
    input[type="url"],
    input[type="search"],
    textarea,
    select {
        font-size: 16px !important;
        padding: 10px var(--spacing-sm) !important;
        min-height: 44px !important;
    }
    
    button,
    .btn,
    input[type="submit"],
    input[type="button"] {
        padding: 10px var(--spacing-md) !important;
        min-height: 44px !important;
    }
    
    /* Reduce spacing on very small screens */
    .settings-section {
        padding-bottom: var(--spacing-md) !important;
    }
    
    .dashboard-stats .stat-card {
        padding: var(--spacing-sm) !important;
    }
    
    .dashboard-stats .stat-value {
        font-size: var(--font-size-xl) !important;
    }
}