/* Updated CSS - Version 1.1 */
:root {
    /* Modern Color Palette */
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --primary-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    
    --secondary: #10b981;
    --secondary-light: #34d399;
    --secondary-dark: #059669;
    
    --accent: #f59e0b;
    --accent-light: #fbbf24;
    --accent-dark: #d97706;
    
    --danger: #ef4444;
    --danger-light: #f87171;
    --danger-dark: #dc2626;
    
    --success: #10b981;
    --success-light: #34d399;
    --success-dark: #059669;
    
    --warning: #f59e0b;
    --warning-light: #fbbf24;
    --warning-dark: #d97706;
    
    /* Light Theme */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-elevated: #ffffff;
    --bg-overlay: rgba(0, 0, 0, 0.1);
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --text-inverse: #ffffff;
    
    --border-light: #e2e8f0;
    --border-medium: #cbd5e1;
    --border-dark: #94a3b8;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Chat specific */
    --chat-bg: #ffffff;
    --message-me: var(--primary-gradient);
    --message-other: #f1f5f9;
    --message-text-me: #ffffff;
    --message-text-other: #0f172a;
    
    /* Voice message colors */
    --voice-primary: var(--primary);
    --voice-secondary: #e0e7ff;
    --voice-recording: var(--danger);
    --voice-playing: var(--success);
    
    /* Animations */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

:root.dark {
    /* Dark Theme */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-elevated: #1e293b;
    --bg-overlay: rgba(0, 0, 0, 0.3);
    
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --text-inverse: #0f172a;
    
    --border-light: #334155;
    --border-medium: #475569;
    --border-dark: #64748b;
    
    --chat-bg: #0f172a;
    --message-other: #1e293b;
    --message-text-other: #f8fafc;
    
    --voice-secondary: #1e1b4b;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Vazirmatn', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    font-weight: 400;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Enhanced Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-medium);
    border-radius: var(--radius-full);
    transition: background var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-dark);
}

/* Typography Enhancements */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

/* Enhanced Button System */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 0.875rem;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    white-space: nowrap;
    user-select: none;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left var(--transition-slow);
}

.btn:hover::before {
    left: 100%;
}

.btn:active {
    transform: translateY(1px);
}

.btn-primary {
    background: var(--primary-gradient);
    color: var(--text-inverse);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-light);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-medium);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-success {
    background: var(--success-gradient, linear-gradient(135deg, var(--success) 0%, var(--success-light) 100%));
    color: var(--text-inverse);
    box-shadow: var(--shadow-md);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-danger {
    background: var(--danger-gradient, linear-gradient(135deg, var(--danger) 0%, var(--danger-light) 100%));
    color: var(--text-inverse);
    box-shadow: var(--shadow-md);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
}

/* Modern Navbar Styles */
.modern-navbar {
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.dark .modern-navbar {
    background: rgba(15, 23, 42, 0.95);
    border-bottom: 1px solid var(--border-light);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

/* Brand Section */
.nav-brand {
    display: flex;
    align-items: center;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition-normal);
}

.brand-link:hover {
    transform: scale(1.05);
    text-decoration: none;
    color: var(--text-primary);
}

.brand-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-gradient);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    box-shadow: var(--shadow-md);
}

.brand-text {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Navigation Links */
.nav-links {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--primary-gradient);
    opacity: 0;
    transition: all var(--transition-normal);
    z-index: -1;
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-secondary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.nav-link:hover::before {
    left: 0;
    opacity: 0.1;
}

.nav-link i {
    font-size: 1.1rem;
}

/* Right Section */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Allow the right section to wrap when space is tight (small laptops) */
.nav-actions { flex-wrap: wrap; }

/* Quick actions row visible only on mobile */
/* Deprecated inline quick actions container (kept for safety) */
.quick-actions-mobile { display: none; }

/* Inline quick actions next to theme toggle for mobile */
.quick-actions-inline {
    display: none;
    align-items: center;
    gap: 0.5rem;
}

/* Dedicated quick actions bar under navbar (mobile only) */
.quick-actions-bar {
    display: none;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 70px;
    z-index: 990;
}

.quick-actions-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.5rem 0.75rem;
    display: flex;
    flex-direction: row !important;
    align-items: center;
    gap: 0.5rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}
.quick-actions-container::-webkit-scrollbar { display: none; }

/* Theme Toggle */
.theme-toggle {
    width: 44px;
    height: 44px;
    border: none;
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

.theme-toggle::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--primary-gradient);
    transition: all var(--transition-normal);
    z-index: 0;
}

.theme-toggle:hover::before {
    left: 0;
}

.toggle-icon {
    position: relative;
    z-index: 1;
    color: var(--text-secondary);
    transition: all var(--transition-normal);
}

.theme-toggle:hover .toggle-icon {
    color: white;
}

.light-icon {
    display: block;
}

.dark-icon {
    display: none;
}

.theme-toggle.dark-mode .light-icon {
    display: none;
}

.theme-toggle.dark-mode .dark-icon {
    display: block;
}

/* User Section */
.user-section {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: var(--primary-gradient);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.875rem;
    box-shadow: var(--shadow-sm);
}

.user-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.user-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.action-btn {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    box-shadow: var(--shadow-sm);
}

.action-btn:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
    color: var(--text-primary);
    text-decoration: none;
}

.location-btn:hover {
    background: var(--success);
    color: white;
}

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

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

/* Login Button */
.login-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--primary-gradient);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-full);
    font-weight: 600;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: white;
    text-decoration: none;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-secondary);
    transition: all var(--transition-normal);
    border-radius: 1px;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 999;
}

.mobile-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.mobile-nav-links {
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    transition: all var(--transition-normal);
}

.mobile-nav-link:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
    text-decoration: none;
}

.mobile-user-section {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-light);
}

.mobile-user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    margin-bottom: 0.5rem;
}

.mobile-user-avatar {
    width: 40px;
    height: 40px;
    background: var(--primary-gradient);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
}

.mobile-logout-btn,
.mobile-login-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    transition: all var(--transition-normal);
}

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

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

/* Main Content */
.main-content {
    padding: 2rem 1rem;
    max-width: 1200px;
    margin: 0 auto;
}

/* Menu Open State */
body.menu-open {
    overflow: hidden;
}

/* Responsive Design */
@media (max-width: 768px) {
    .modern-navbar {
        padding: 0;
        height: 60px;
    }
    
    .nav-container {
        height: 60px;
        padding: 0 1rem;
        display: flex;
        align-items: center;
        justify-content: space-between;
    }
    
    .nav-brand {
        flex: 0 0 auto;
    }
    
    .brand-text {
        font-size: 1.125rem;
    }
    
    .brand-icon {
        width: 32px;
        height: 32px;
        font-size: 0.875rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .user-section {
        display: none;
    }
    
    .nav-actions {
        display: flex;
        align-items: center;
        gap: 0.5rem;
        flex: 0 0 auto;
    }
    
    .nav-actions > .action-btn {
        display: none;
    }
    
    .theme-toggle {
        width: 32px;
        height: 32px;
        order: 1;
    }
    
    .mobile-menu-toggle {
        display: flex;
        order: 2;
        width: 32px;
        height: 32px;
        padding: 0.25rem;
    }
    
    .mobile-menu-toggle span {
        width: 20px;
        height: 2px;
    }
    
    .mobile-menu {
        top: 60px;
    }
}

/* Small laptop/tablet landscape tweaks */
@media (max-width: 992px) and (min-width: 769px) {
    /* Reduce gaps and sizes to prevent overflow around ~992px */
    .nav-actions { gap: 0.5rem; }
    .theme-toggle { width: 40px; height: 40px; }
    .action-btn { width: 32px; height: 32px; }
    /* Hide long username label to free space but keep avatar */
    .user-section .user-name { display: none; }
    /* Show compact inline quick actions beside theme toggle on small laptops */
    .quick-actions-inline { display: flex; }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 0.75rem;
    }
    
    .brand-text {
        font-size: 1rem;
    }
    
    .brand-icon {
        width: 28px;
        height: 28px;
        font-size: 0.75rem;
    }
    
    .theme-toggle {
        width: 28px;
        height: 28px;
    }
    
    .mobile-menu-toggle {
        width: 28px;
        height: 28px;
    }
    
    .mobile-menu-toggle span {
        width: 18px;
        height: 1.5px;
    }
    
    .main-content {
        padding: 1rem 0.5rem;
    }
}

/* Enhanced Emoji Picker */
.emoji-picker {
    position: absolute;
    bottom: 100%;
    left: 0;
    background: var(--bg-elevated);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
    z-index: 1000;
    display: none;
    width: 320px;
    max-height: 400px;
    overflow: hidden;
    backdrop-filter: blur(20px);
}

.emoji-picker.show {
    display: block;
    animation: slideUp 0.3s ease-out;
}

.emoji-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    border-bottom: 1px solid var(--border-light);
    background: var(--bg-secondary);
}

.emoji-header span {
    font-weight: 600;
    color: var(--text-primary);
}

.emoji-close {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.emoji-close:hover {
    background: var(--danger);
    color: white;
    transform: scale(1.1);
}

.emoji-categories {
    display: flex;
    padding: 0.75rem;
    gap: 0.25rem;
    border-bottom: 1px solid var(--border-light);
    background: var(--bg-secondary);
    overflow-x: auto;
}

.emoji-category {
    width: 36px;
    height: 36px;
    border: none;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.emoji-category:hover {
    background: var(--primary);
    color: white;
    transform: scale(1.1);
}

.emoji-category.active {
    background: var(--primary);
    color: white;
}

.emoji-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 0.25rem;
    padding: 1rem;
    max-height: 280px;
    overflow-y: auto;
}

.emoji-item {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.25rem;
    transition: all var(--transition-fast);
}

.emoji-item:hover {
    background: var(--bg-tertiary);
    transform: scale(1.2);
}

.emoji-item:active {
    transform: scale(0.9);
}

/* Emoji picker scrollbar */
.emoji-grid::-webkit-scrollbar {
    width: 4px;
}

.emoji-grid::-webkit-scrollbar-track {
    background: transparent;
}

.emoji-grid::-webkit-scrollbar-thumb {
    background: var(--border-medium);
    border-radius: var(--radius-full);
}

.emoji-grid::-webkit-scrollbar-thumb:hover {
    background: var(--border-dark);
}

/* Enhanced Sticker Picker */
.sticker-picker {
    position: absolute;
    bottom: 100%;
    left: 0;
    background: var(--bg-elevated);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
    z-index: 1000;
    display: none;
    width: 380px;
    max-height: 500px;
    overflow: hidden;
    backdrop-filter: blur(20px);
}

.sticker-picker.show {
    display: block;
    animation: slideUp 0.3s ease-out;
}

.sticker-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    border-bottom: 1px solid var(--border-light);
    background: var(--bg-secondary);
}

.sticker-header span {
    font-weight: 600;
    color: var(--text-primary);
}

.sticker-close {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.sticker-close:hover {
    background: var(--danger);
    color: white;
    transform: scale(1.1);
}

.sticker-search {
    display: flex;
    padding: 0.75rem;
    gap: 0.5rem;
    border-bottom: 1px solid var(--border-light);
    background: var(--bg-secondary);
}

.sticker-search-input {
    flex: 1;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.sticker-search-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.sticker-search-btn {
    width: 36px;
    height: 36px;
    border: none;
    background: var(--primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: white;
    transition: all var(--transition-fast);
}

.sticker-search-btn:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

.sticker-categories {
    display: flex;
    padding: 0.75rem;
    gap: 0.5rem;
    border-bottom: 1px solid var(--border-light);
    background: var(--bg-secondary);
    overflow-x: auto;
}

.sticker-category {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem;
    border: none;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    flex-shrink: 0;
    min-width: 60px;
    font-size: 0.75rem;
}

.sticker-category:hover {
    background: var(--primary);
    color: white;
    transform: scale(1.05);
}

.sticker-category.active {
    background: var(--primary);
    color: white;
}

.sticker-category span:first-child {
    font-size: 1.25rem;
}

.sticker-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
    padding: 1rem;
    max-height: 320px;
    overflow-y: auto;
}

.sticker-item {
    aspect-ratio: 1;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    overflow: hidden;
    position: relative;
}

.sticker-item:hover {
    border-color: var(--primary);
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.sticker-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-fast);
}

.sticker-item:hover img {
    transform: scale(1.1);
}

.sticker-loading {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    color: var(--text-muted);
    gap: 0.5rem;
}

.sticker-loading i {
    font-size: 1.5rem;
    color: var(--primary);
}

.sticker-error {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    color: var(--danger);
    gap: 0.5rem;
    text-align: center;
}

.sticker-error i {
    font-size: 2rem;
}

.sticker-empty {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    color: var(--text-muted);
    gap: 0.5rem;
    text-align: center;
}

.sticker-empty i {
    font-size: 2rem;
}

/* Sticker picker scrollbar */
.sticker-grid::-webkit-scrollbar {
    width: 4px;
}

.sticker-grid::-webkit-scrollbar-track {
    background: transparent;
}

.sticker-grid::-webkit-scrollbar-thumb {
    background: var(--border-medium);
    border-radius: var(--radius-full);
}

.sticker-grid::-webkit-scrollbar-thumb:hover {
    background: var(--border-dark);
}

/* Enhanced Login Page */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-gradient);
    padding: 1rem;
    position: relative;
    overflow: hidden;
}

.login-wrapper::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(10px, -10px) rotate(1deg); }
    50% { transform: translate(-5px, 10px) rotate(-1deg); }
    75% { transform: translate(-10px, -5px) rotate(1deg); }
}

.login-card {
    width: 100%;
    max-width: 450px;
    background: var(--bg-elevated);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    padding: 3rem;
    border: 1px solid var(--border-light);
    position: relative;
    z-index: 10;
    backdrop-filter: blur(20px);
    animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-card h1 {
    text-align: center;
    margin-bottom: 2rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Enhanced User List */
.user-search {
    position: sticky;
    top: 0;
    background: var(--bg-secondary);
    z-index: 10;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-light);
    backdrop-filter: blur(20px);
}

.user-search input {
    background: var(--bg-elevated);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-xl);
    padding: 1rem 1.5rem;
    font-size: 1rem;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.user-search input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
    transform: translateY(-1px);
}

.user-item {
    display: flex;
    align-items: center;
    padding: 1.25rem;
    margin: 0.5rem 0;
    border-radius: var(--radius-xl);
    transition: all var(--transition-normal);
    text-decoration: none;
    color: var(--text-primary);
    border: 1px solid transparent;
    background: var(--bg-secondary);
    position: relative;
    overflow: hidden;
}

.user-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.1), transparent);
    transition: left var(--transition-slow);
}

.user-item:hover {
    background: var(--bg-tertiary);
    transform: translateX(-8px) translateY(-2px);
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    text-decoration: none;
    color: var(--text-primary);
}

.user-item:hover::before {
    left: 100%;
}

.user-item .user-avatar {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.25rem;
    margin-left: 1rem;
    flex-shrink: 0;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.user-item:hover .user-avatar {
    transform: scale(1.1) rotate(5deg);
    box-shadow: var(--shadow-lg);
}

.user-item .user-info {
    flex: 1;
    min-width: 0;
}

.user-item .user-name {
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
    font-size: 1rem;
}

.user-item .user-username {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.user-item .badge {
    background: var(--primary-gradient);
    color: white;
    border-radius: var(--radius-full);
    padding: 0.375rem 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.user-item:hover .badge {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

/* Enhanced Chat Container */
.chat-container {
    display: grid;
    grid-template-rows: auto 1fr auto;
    height: calc(100vh - 80px);
    background: var(--chat-bg);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
}

.chat-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-light);
    padding: 1.25rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    backdrop-filter: blur(20px);
}

.chat-header .chat-user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.chat-header .chat-user-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.125rem;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.chat-header .chat-user-avatar:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.chat-header .chat-user-details h5 {
    margin: 0;
    font-weight: 700;
    color: var(--text-primary);
    font-size: 1.125rem;
}

.chat-header .chat-user-details .status {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.chat-log {
    background: var(--chat-bg);
    padding: 1.5rem;
    overflow-y: auto;
    scroll-behavior: smooth;
    position: relative;
}

/* Enhanced Message Styles */
.message {
    max-width: 75%;
    margin: 1rem 0;
    animation: messageSlideIn 0.4s ease-out;
    position: relative;
}

@keyframes messageSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.message.me {
    margin-right: auto;
    margin-left: 0;
}

.message.other {
    margin-left: auto;
    margin-right: 0;
}

.message-bubble {
    padding: 1rem 1.25rem;
    border-radius: var(--radius-2xl);
    position: relative;
    word-wrap: break-word;
    line-height: 1.5;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.message.me .message-bubble {
    background: var(--message-me);
    color: var(--message-text-me);
    border-bottom-right-radius: var(--radius-md);
    position: relative;
}

.message.me .message-bubble::before {
    content: '';
    position: absolute;
    bottom: 0;
    right: -8px;
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 8px solid var(--primary);
}

.message.other .message-bubble {
    background: var(--message-other);
    color: var(--message-text-other);
    border-bottom-left-radius: var(--radius-md);
    border: 1px solid var(--border-light);
}

.message.other .message-bubble::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: -8px;
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 8px solid var(--message-other);
}

.message-bubble:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.message-time {
    font-size: 0.75rem;
    opacity: 0.8;
    margin-top: 0.5rem;
    display: block;
    font-weight: 500;
}

.message.me .message-time {
    text-align: left;
}

.message.other .message-time {
    text-align: right;
}

/* Sticker Message Styles */
.sticker-message {
    display: inline-block;
    max-width: 200px;
    max-height: 200px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-fast);
}

.sticker-message:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.sticker-message img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-lg);
}

/* Enhanced Chat Input */
.chat-input-container {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-light);
    padding: 1.5rem;
}

.chat-input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: 1rem;
    background: var(--bg-elevated);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-2xl);
    padding: 1rem;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.chat-input-wrapper:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
    transform: translateY(-2px);
}

.chat-input-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

.chat-action-btn {
    width: 44px;
    height: 44px;
    border: none;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.chat-action-btn:hover {
    background: var(--primary);
    color: white;
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

.chat-action-btn.primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-md);
}

.chat-action-btn.primary:hover {
    transform: scale(1.1) translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.chat-input {
    flex: 1;
    border: none;
    background: transparent;
    resize: none;
    outline: none;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    line-height: 1.5;
    max-height: 120px;
    min-height: 24px;
    padding: 0;
}

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

/* Enhanced Voice Recording */
.voice-controls-container {
    margin-top: 1.5rem;
    animation: slideUp 0.3s ease-out;
}

.voice-controls {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    justify-content: center;
}

.voice-record-btn {
    position: relative;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    padding: 1.25rem 2.5rem;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 180px;
    justify-content: center;
    overflow: hidden;
}

.voice-record-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left var(--transition-slow);
}

.voice-record-btn:hover::before {
    left: 100%;
}

.voice-record-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.voice-record-btn.recording {
    background: var(--danger-gradient, linear-gradient(135deg, var(--danger) 0%, var(--danger-light) 100%));
    animation: pulse-recording 1.5s infinite;
}

@keyframes pulse-recording {
    0% { 
        transform: scale(1);
        box-shadow: var(--shadow-lg);
    }
    50% { 
        transform: scale(1.05);
        box-shadow: 0 0 0 20px rgba(239, 68, 68, 0.2);
    }
    100% { 
        transform: scale(1);
        box-shadow: var(--shadow-lg);
    }
}

.voice-wave {
    display: flex;
    align-items: center;
    gap: 4px;
    height: 28px;
}

.voice-wave-bar {
    width: 5px;
    background: white;
    border-radius: 3px;
    animation: wave-animation 0.8s ease-in-out infinite;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.voice-wave-bar:nth-child(1) { animation-delay: 0s; height: 14px; }
.voice-wave-bar:nth-child(2) { animation-delay: 0.1s; height: 22px; }
.voice-wave-bar:nth-child(3) { animation-delay: 0.2s; height: 28px; }
.voice-wave-bar:nth-child(4) { animation-delay: 0.3s; height: 28px; }
.voice-wave-bar:nth-child(5) { animation-delay: 0.4s; height: 22px; }
.voice-wave-bar:nth-child(6) { animation-delay: 0.5s; height: 14px; }

@keyframes wave-animation {
    0%, 100% { 
        transform: scaleY(0.5); 
        opacity: 0.7; 
    }
    50% { 
        transform: scaleY(1); 
        opacity: 1; 
    }
}

.recording-time {
    color: var(--danger);
    font-weight: 700;
    font-size: 1rem;
    min-width: 70px;
    text-align: center;
    background: rgba(239, 68, 68, 0.1);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.voice-cancel-hint {
    color: var(--text-muted);
    font-size: 0.875rem;
    text-align: center;
    margin-top: 1rem;
    opacity: 0;
    transition: opacity var(--transition-normal);
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
}

.voice-cancel-hint.show {
    opacity: 1;
}

.voice-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1.5rem;
    justify-content: center;
}

.voice-action-btn {
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--border-medium);
    border-radius: var(--radius-full);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.voice-action-btn:hover {
    background: var(--text-secondary);
    color: white;
    border-color: var(--text-secondary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Enhanced Voice Message */
.voice-message {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: var(--voice-secondary);
    border-radius: var(--radius-2xl);
    min-width: 240px;
    max-width: 320px;
    transition: all var(--transition-normal);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
}

.voice-message.playing {
    background: var(--success-gradient, linear-gradient(135deg, var(--success) 0%, var(--success-light) 100%));
    color: white;
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

.voice-play-btn {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    border: none;
    background: var(--voice-primary);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
    flex-shrink: 0;
    box-shadow: var(--shadow-md);
}

.voice-play-btn:hover {
    transform: scale(1.15);
    box-shadow: var(--shadow-lg);
}

.voice-play-btn.playing {
    background: var(--voice-playing);
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.voice-play-btn.playing .play-icon {
    display: none;
}

.voice-play-btn.playing .pause-icon {
    display: block;
}

.voice-play-btn .pause-icon {
    display: none;
}

.voice-progress {
    flex: 1;
    height: 6px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-full);
    overflow: hidden;
    position: relative;
}

.voice-progress-bar {
    height: 100%;
    background: white;
    border-radius: var(--radius-full);
    transition: width 0.1s ease;
    position: relative;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.voice-progress-bar::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 12px;
    height: 12px;
    background: white;
    border-radius: var(--radius-full);
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.8);
}

.voice-duration {
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 600;
    min-width: 50px;
    text-align: right;
}

/* Enhanced File Message */
.file-message {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-light);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.file-message:hover {
    background: var(--bg-secondary);
    border-color: var(--border-medium);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.file-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    background: var(--primary-gradient);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.file-message:hover .file-icon {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.file-info {
    flex: 1;
    min-width: 0;
}

.file-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    word-break: break-word;
}

.file-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 0.75rem;
}

.file-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-full);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    box-shadow: var(--shadow-sm);
}

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

/* Enhanced Welcome Section */
.welcome-section {
    text-align: center;
    padding: 4rem 2rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-2xl);
    margin: 3rem 0;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.welcome-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
    animation: float 15s ease-in-out infinite;
}

.welcome-section i {
    color: var(--primary);
    margin-bottom: 2rem;
    font-size: 4rem;
    position: relative;
    z-index: 10;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.welcome-section h4 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-weight: 700;
    position: relative;
    z-index: 10;
}

.welcome-section p {
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    font-size: 1rem;
    position: relative;
    z-index: 10;
}

/* Enhanced Alerts */
.alert {
    border-radius: var(--radius-xl);
    border: none;
    font-weight: 600;
    padding: 1.25rem 1.5rem;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.alert::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-gradient);
}

.alert-info {
    background: rgba(99, 102, 241, 0.1);
    color: var(--text-primary);
    border-left: 4px solid var(--primary);
}

.alert-info strong {
    color: var(--primary);
}

/* Enhanced Map */
#map {
    height: 70vh;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-light);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

/* Enhanced Status Indicators */
.status-online {
    width: 14px;
    height: 14px;
    background: var(--success);
    border-radius: var(--radius-full);
    border: 2px solid var(--bg-primary);
    display: inline-block;
    margin-left: 0.5rem;
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.5);
    animation: pulse 2s infinite;
}

/* Enhanced Badge */
.badge {
    font-weight: 600;
    border-radius: var(--radius-full);
    padding: 0.375rem 1rem;
    font-size: 0.75rem;
    box-shadow: var(--shadow-sm);
}

.badge.text-bg-success {
    background: var(--success-gradient, linear-gradient(135deg, var(--success) 0%, var(--success-light) 100%)) !important;
}

.badge.text-bg-secondary {
    background: var(--bg-tertiary) !important;
    color: var(--text-secondary) !important;
}

/* Enhanced Form Controls */
.form-control {
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    background: var(--bg-elevated);
    color: var(--text-primary);
    transition: all var(--transition-normal);
    padding: 0.875rem 1.25rem;
    font-size: 1rem;
    box-shadow: var(--shadow-sm);
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
    background: var(--bg-elevated);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.form-control::placeholder {
    color: var(--text-muted);
}

/* Enhanced Responsive Design */
@media (max-width: 768px) {
    .chat-container {
        height: calc(100vh - 60px);
        border-radius: 0;
    }
    
    .message {
        max-width: 85%;
    }
    
    .voice-controls {
        flex-direction: column;
        gap: 1rem;
    }
    
    .voice-record-btn {
        width: 100%;
        max-width: 240px;
    }
    
    .voice-message {
        min-width: 200px;
        max-width: 280px;
    }
    
    .welcome-section {
        padding: 3rem 1.5rem;
        margin: 2rem 0;
    }
    
    .welcome-section h4 {
        font-size: 1.5rem;
    }
    
    .chat-input-wrapper {
        padding: 0.75rem;
    }
    
    .chat-action-btn {
        width: 40px;
        height: 40px;
    }
    
    .navbar-brand {
        font-size: 1.25rem;
    }
}

@media (max-width: 576px) {
    .login-card {
        padding: 2.5rem 1.5rem;
    }
    
    .user-item {
        padding: 1rem;
    }
    
    .user-item .user-avatar {
        width: 48px;
        height: 48px;
        font-size: 1.125rem;
    }
    
    .chat-header {
        padding: 1rem;
    }
    
    .chat-log {
        padding: 1rem;
    }
    
    .chat-input-container {
        padding: 1rem;
    }
    
    .message {
        max-width: 90%;
    }
    
    .voice-record-btn {
        padding: 1rem 2rem;
        font-size: 0.875rem;
    }
}

/* Enhanced Loading States */
.loading-spinner {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 3px solid var(--border-light);
    border-radius: var(--radius-full);
    border-top-color: var(--primary);
    animation: spin 1s ease-in-out infinite;
}

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

/* Enhanced Focus States */
.chat-action-btn:focus,
.voice-record-btn:focus,
.voice-action-btn:focus {
    outline: none;
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2);
}

/* Enhanced Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Enhanced Print Styles */
@media print {
    .chat-input-container,
    .voice-controls-container,
    .navbar {
        display: none !important;
    }
    
    .chat-container {
        height: auto;
        box-shadow: none;
        border: none;
    }
    
    .chat-log {
        overflow: visible;
    }
}

/* Enhanced Utility Classes */
.text-gradient {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-gradient {
    background: var(--primary-gradient);
}

.shadow-glow {
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.3);
}

.hover-lift {
    transition: transform var(--transition-normal);
}

.hover-lift:hover {
    transform: translateY(-4px);
}

/* Enhanced Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

.scale-in {
    animation: scaleIn 0.4s ease-out;
}

/* Enhanced Hover Effects */
.user-item:hover .user-avatar {
    transform: scale(1.1) rotate(5deg);
}

.chat-action-btn:hover {
    transform: scale(1.15);
}

.voice-play-btn:hover {
    transform: scale(1.2);
}

/* Enhanced Dark Mode Transitions */
* {
    transition: background-color var(--transition-normal), 
                color var(--transition-normal), 
                border-color var(--transition-normal),
                box-shadow var(--transition-normal);
}

/* Enhanced Scrollbar for Chat */
.chat-log::-webkit-scrollbar {
    width: 6px;
}

.chat-log::-webkit-scrollbar-track {
    background: transparent;
}

.chat-log::-webkit-scrollbar-thumb {
    background: var(--border-medium);
    border-radius: var(--radius-full);
    transition: background var(--transition-fast);
}

.chat-log::-webkit-scrollbar-thumb:hover {
    background: var(--border-dark);
}

/* Enhanced Status Text */
.status-text {
    color: var(--success);
    font-size: 0.75rem;
    font-weight: 600;
    margin-left: 0.5rem;
}

/* Enhanced File Status Indicator */
.file-status-indicator {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.75rem;
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    transition: all var(--transition-normal);
    opacity: 0;
    transform: translateY(-10px);
}

.file-status-indicator:not(:empty) {
    opacity: 1;
    transform: translateY(0);
}

/* Enhanced Text Gradient Utility */
.text-gradient {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Enhanced Hover Lift Effect */
.hover-lift {
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.hover-lift:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Enhanced Message Animations */
.message {
    animation: messageSlideIn 0.4s ease-out;
}

@keyframes messageSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

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

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--border-light);
    border-top: 2px solid var(--primary);
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
}

/* Enhanced Focus States */
.chat-action-btn:focus,
.voice-record-btn:focus,
.voice-action-btn:focus,
.btn:focus {
    outline: none;
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2);
}

/* Enhanced Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Enhanced Print Styles */
@media print {
    .chat-input-container,
    .voice-controls-container,
    .navbar {
        display: none !important;
    }
    
    .chat-container {
        height: auto;
        box-shadow: none;
        border: none;
    }
    
    .chat-log {
        overflow: visible;
    }
}