/* Main CSS - Persian/Farsi RTL Support */
:root {
    /* Dark Theme Colors */
    --primary-color: #7289da;
    --primary-dark: #5b6eae;
    --primary-light: #9baec8;
    
    --secondary-color: #424549;
    --secondary-dark: #36393e;
    --secondary-light: #4f545c;
    
    --dark-color: #282b30;
    --darker-color: #1e2124;
    --darkest-color: #0c0e10;
    
    --text-color: #ffffff;
    --text-secondary: #b9bbbe;
    --text-muted: #72767d;
    
    --success-color: #43b581;
    --danger-color: #f04747;
    --warning-color: #faa61a;
    --info-color: #5865f2;
    
    --border-color: #424549;
    --border-light: #4f545c;
    
    --hover-color: #3a3d42;
    --active-color: #4f545c;
    
    --background: var(--darker-color);
    --surface: var(--dark-color);
    --elevated: var(--secondary-dark);
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-circle: 50%;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 12px 24px rgba(0, 0, 0, 0.5);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Font Sizes */
    --font-xs: 12px;
    --font-sm: 14px;
    --font-md: 16px;
    --font-lg: 18px;
    --font-xl: 20px;
    --font-2xl: 24px;
    --font-3xl: 32px;
    
    /* Z-index layers */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-toast: 1080;
}

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

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

body {
    font-family: 'Vazirmatn', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--background);
    color: var(--text-color);
    line-height: 1.6;
    direction: rtl;
    text-align: right;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    touch-action: manipulation;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--font-3xl); }
h2 { font-size: var(--font-2xl); }
h3 { font-size: var(--font-xl); }
h4 { font-size: var(--font-lg); }
h5 { font-size: var(--font-md); }
h6 { font-size: var(--font-sm); }

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

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

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

/* Layout */
.container-fluid {
    width: 100%;
    padding-right: var(--spacing-md);
    padding-left: var(--spacing-md);
    margin-right: auto;
    margin-left: auto;
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin-right: calc(var(--spacing-md) * -0.5);
    margin-left: calc(var(--spacing-md) * -0.5);
}

.col {
    flex: 1 0 0;
    padding-right: calc(var(--spacing-md) * 0.5);
    padding-left: calc(var(--spacing-md) * 0.5);
}

/* Auth Pages */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--darkest-color) 0%, var(--darker-color) 100%);
    padding: var(--spacing-md);
}

.auth-wrapper {
    display: flex;
    width: 100%;
    max-width: 1200px;
    background-color: var(--surface);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.auth-card {
    flex: 1;
    padding: var(--spacing-xl);
    min-width: 400px;
}

.auth-welcome {
    flex: 1;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    padding: var(--spacing-xl);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    display: none; /* Hide on mobile */
}

.auth-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-xl);
}

.auth-tab {
    flex: 1;
    padding: var(--spacing-md);
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: var(--font-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    border-bottom: 3px solid transparent;
}

.auth-tab:hover {
    color: var(--text-color);
    background-color: var(--hover-color);
}

.auth-tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    font-weight: 600;
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
    animation: fadeIn var(--transition-normal);
}

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

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
    font-weight: 500;
    font-size: var(--font-sm);
}

.form-control,
.form-select,
textarea {
    width: 100%;
    padding: 12px 16px;
    background-color: var(--darker-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-color);
    font-size: var(--font-md);
    transition: all var(--transition-normal);
}

.form-control:focus,
.form-select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(114, 137, 218, 0.1);
    background-color: var(--dark-color);
}

textarea {
    resize: vertical;
    min-height: 100px;
    font-family: inherit;
}

.password-input {
    position: relative;
}

.password-input .form-control {
    padding-left: 45px;
}

.toggle-password {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    font-size: var(--font-md);
}

.toggle-password:hover {
    color: var(--text-color);
}

.form-check {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-md);
    cursor: pointer;
}

.form-check-input {
    margin-left: var(--spacing-sm);
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.form-check-label {
    cursor: pointer;
    color: var(--text-secondary);
}

.form-check-input:checked + .form-check-label {
    color: var(--text-color);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    font-size: var(--font-md);
    font-weight: 500;
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    gap: 8px;
    min-height: 44px; /* Touch-friendly */
    min-width: 44px;
}

.btn-sm {
    padding: 6px 12px;
    font-size: var(--font-sm);
    min-height: 36px;
    min-width: 36px;
}

.btn-lg {
    padding: 14px 28px;
    font-size: var(--font-lg);
    min-height: 52px;
    min-width: 52px;
}

.btn-block {
    display: flex;
    width: 100%;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

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

.btn-secondary:hover {
    background-color: var(--secondary-dark);
    border-color: var(--secondary-dark);
}

.btn-outline-secondary {
    background-color: transparent;
    border-color: var(--border-color);
    color: var(--text-secondary);
}

.btn-outline-secondary:hover {
    background-color: var(--hover-color);
    border-color: var(--border-light);
    color: var(--text-color);
}

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

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

.btn-danger:hover {
    background-color: #d32f2f;
    border-color: #d32f2f;
}

.btn-link {
    background: none;
    border: none;
    color: var(--primary-color);
    padding: 0;
    min-height: auto;
    min-width: auto;
}

.btn-link:hover {
    color: var(--primary-light);
    text-decoration: underline;
}

/* Navigation */
.main-navbar {
    background-color: var(--surface);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-sm) 0;
}

.navbar-brand {
    font-size: var(--font-xl);
    font-weight: 600;
    color: var(--text-color) !important;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.navbar-brand:hover {
    color: var(--primary-color) !important;
}

.nav-link {
    color: var(--text-secondary) !important;
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md) !important;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    min-height: 44px;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-color) !important;
    background-color: var(--hover-color);
}

.nav-link.active {
    color: var(--primary-color) !important;
}

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 4px 8px;
    font-size: var(--font-xs);
    font-weight: 600;
    line-height: 1;
    border-radius: 10px;
    min-width: 20px;
    height: 20px;
}

.badge.bg-danger {
    background-color: var(--danger-color) !important;
}

.dropdown-menu {
    background-color: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-sm) 0;
}

.dropdown-item {
    color: var(--text-color);
    padding: var(--spacing-sm) var(--spacing-md);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    min-height: 44px;
}

.dropdown-item:hover {
    background-color: var(--hover-color);
    color: var(--text-color);
}

.dropdown-item.text-danger:hover {
    color: var(--danger-color) !important;
}

/* Main Content */
.main-content {
    min-height: calc(100vh - 70px); /* Adjust based on navbar height */
    padding: var(--spacing-md);
}

/* Chats Page */
.chats-page {
    height: calc(100vh - 70px);
    overflow: hidden;
}

.sidebar-column {
    height: 100%;
    border-left: 1px solid var(--border-color);
}

.chats-sidebar {
    height: 100%;
    display: flex;
    flex-direction: column;
    background-color: var(--surface);
}

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

.chats-header h1 {
    margin: 0;
    font-size: var(--font-xl);
}

.chats-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.search-box {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    position: relative;
    flex-shrink: 0;
}

.search-box input {
    width: 100%;
    padding: 10px 16px 10px 40px;
    background-color: var(--darker-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-color);
    font-size: var(--font-md);
}

.search-box i {
    position: absolute;
    right: 28px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.chats-list {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-sm);
}

.chat-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    margin-bottom: var(--spacing-sm);
    gap: var(--spacing-md);
    min-height: 72px;
}

.chat-item:hover {
    background-color: var(--hover-color);
}

.chat-item:active {
    background-color: var(--active-color);
    transform: scale(0.98);
}

.chat-avatar {
    position: relative;
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    border-radius: var(--radius-circle);
    background-color: var(--darker-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-xl);
    color: var(--text-secondary);
}

.unread-badge {
    position: absolute;
    top: -4px;
    left: -4px;
    background-color: var(--danger-color);
    color: white;
    width: 20px;
    height: 20px;
    border-radius: var(--radius-circle);
    font-size: var(--font-xs);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.chat-name {
    font-weight: 600;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.chat-preview {
    font-size: var(--font-sm);
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 4px;
    flex-shrink: 0;
}

.chat-time {
    font-size: var(--font-xs);
    color: var(--text-muted);
}

.chat-status i {
    font-size: 10px;
}

.chat-column {
    height: 100%;
    background-color: var(--background);
}

.chat-empty {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--text-secondary);
}

.empty-content i {
    margin-bottom: var(--spacing-lg);
    color: var(--primary-color);
    opacity: 0.5;
}

/* Chat Page */
.chat-page {
    height: calc(100vh - 70px);
    display: flex;
    flex-direction: column;
    background-color: var(--background);
}

.chat-header {
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--surface);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
    min-height: 70px;
}

.chat-header-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex: 1;
}

.chat-avatar-header {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-circle);
    background-color: var(--darker-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-lg);
    color: var(--text-secondary);
    flex-shrink: 0;
}

.chat-details {
    flex: 1;
    min-width: 0;
}

.chat-title {
    margin: 0;
    font-size: var(--font-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

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

.chat-header-actions {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

/* Messages Container */
.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    background-color: var(--background);
}

.date-divider {
    text-align: center;
    margin: var(--spacing-md) 0;
    position: relative;
}

.date-divider span {
    background-color: var(--surface);
    padding: 6px 12px;
    border-radius: var(--radius-lg);
    font-size: var(--font-sm);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.message-wrapper {
    display: flex;
    max-width: 70%;
    animation: messageAppear var(--transition-normal);
}

@keyframes messageAppear {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message-wrapper.sent {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message-wrapper.received {
    align-self: flex-start;
}

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-circle);
    background-color: var(--darker-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-sm);
    color: var(--text-secondary);
    margin-left: var(--spacing-sm);
    margin-top: 4px;
    flex-shrink: 0;
}

.message-wrapper.sent .message-avatar {
    margin-left: 0;
    margin-right: var(--spacing-sm);
}

.message-content-wrapper {
    flex: 1;
}

.message-sender {
    font-size: var(--font-sm);
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-color);
    padding-right: 8px;
}

.message-wrapper.sent .message-sender {
    display: none;
}

.message-bubble {
    background-color: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    position: relative;
    word-wrap: break-word;
}

.message-wrapper.sent .message-bubble {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    border-bottom-right-radius: var(--radius-sm);
}

.message-wrapper.received .message-bubble {
    background-color: var(--surface);
    border-bottom-left-radius: var(--radius-sm);
}

.message-body {
    margin-bottom: var(--spacing-xs);
}

.message-meta {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    font-size: var(--font-xs);
    opacity: 0.8;
}

.message-time {
    font-size: 11px;
}

.message-status {
    font-size: 10px;
}

.message-edited {
    font-size: 10px;
    opacity: 0.7;
    font-style: italic;
}

/* Media Messages */
.media-message {
    max-width: 300px;
}

.message-image {
    max-width: 100%;
    max-height: 300px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: transform var(--transition-normal);
}

.message-image:hover {
    transform: scale(1.02);
}

.message-video,
.message-audio {
    width: 100%;
    border-radius: var(--radius-md);
    background-color: var(--darker-color);
}

.media-caption {
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: var(--font-sm);
}

/* Document Messages */
.document-message {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--darker-color);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    max-width: 400px;
}

.document-icon {
    flex-shrink: 0;
    color: var(--primary-color);
}

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

.document-name {
    font-weight: 500;
    color: var(--text-color);
    text-decoration: none;
    display: block;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.document-name:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.document-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: var(--font-xs);
    color: var(--text-secondary);
}

.document-download {
    flex-shrink: 0;
    color: var(--text-secondary);
    padding: 6px;
    border-radius: var(--radius-sm);
    background-color: var(--dark-color);
}

.document-download:hover {
    color: var(--text-color);
    background-color: var(--hover-color);
}

/* Location Messages */
.location-message {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--darker-color);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    max-width: 300px;
}

.location-map {
    flex-shrink: 0;
    color: var(--danger-color);
}

.location-info {
    flex: 1;
}

.location-coordinates {
    font-family: monospace;
    font-size: var(--font-sm);
    margin-bottom: 4px;
}

.location-link {
    font-size: var(--font-sm);
    color: var(--primary-color);
}

/* Message Input */
.message-input-container {
    padding: var(--spacing-md);
    background-color: var(--surface);
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: flex-end;
    gap: var(--spacing-md);
    flex-shrink: 0;
}

.attachment-menu {
    position: relative;
}

.attachment-options {
    position: absolute;
    bottom: 100%;
    right: 0;
    background-color: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-dropdown);
    min-width: 200px;
}

.attachment-options button {
    background: none;
    border: none;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    color: var(--text-color);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    font-size: var(--font-sm);
    min-height: 60px;
    min-width: 60px;
}

.attachment-options button:hover {
    background-color: var(--hover-color);
}

.attachment-options button i {
    font-size: var(--font-lg);
}

.message-input-wrapper {
    flex: 1;
    position: relative;
}

.message-input-wrapper textarea {
    width: 100%;
    min-height: 44px;
    max-height: 150px;
    padding: 12px 16px;
    background-color: var(--darker-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-color);
    font-size: var(--font-md);
    resize: none;
    font-family: inherit;
    line-height: 1.5;
}

.message-input-wrapper textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(114, 137, 218, 0.1);
}

.input-actions {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

/* Emoji Picker */
.emoji-picker-container {
    position: absolute;
    bottom: 100%;
    right: 0;
    background-color: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-dropdown);
    width: 300px;
    max-height: 300px;
    overflow-y: auto;
}

.emoji-category {
    margin-bottom: var(--spacing-md);
}

.emoji-category:last-child {
    margin-bottom: 0;
}

.emoji {
    display: inline-block;
    font-size: 24px;
    cursor: pointer;
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    margin: 2px;
    min-width: 36px;
    min-height: 36px;
    text-align: center;
    line-height: 36px;
}

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

/* Voice Recorder */
.voice-recorder {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-modal);
    min-width: 300px;
}

.recorder-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
}

.recording-wave {
    width: 40px;
    height: 40px;
    background: linear-gradient(90deg, var(--primary-color), var(--danger-color));
    border-radius: var(--radius-circle);
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.recording-time {
    font-size: var(--font-xl);
    font-weight: 600;
    color: var(--text-color);
    min-width: 60px;
    text-align: center;
}

/* Reply Preview */
.reply-preview {
    padding: var(--spacing-md);
    background-color: var(--darker-color);
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

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

.reply-sender {
    font-size: var(--font-sm);
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 2px;
}

.reply-content {
    font-size: var(--font-sm);
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Modals */
.modal-content {
    background-color: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
}

.modal-header {
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-lg);
}

.modal-title {
    color: var(--text-color);
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.modal-body {
    padding: var(--spacing-lg);
    color: var(--text-color);
}

.modal-footer {
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-lg);
}

.btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}

/* Loading Spinner */
.loading-spinner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal-backdrop);
}

.spinner-border {
    width: 3rem;
    height: 3rem;
}

/* Toast Notifications */
.toast {
    background-color: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.toast-header {
    background-color: var(--darker-color);
    border-bottom: 1px solid var(--border-color);
    color: var(--text-color);
}

.toast-body {
    color: var(--text-color);
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--darker-color);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
    background: var(--secondary-color);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-light);
}

/* Responsive Design */
@media (max-width: 992px) {
    .auth-welcome {
        display: none;
    }
    
    .auth-card {
        min-width: 100%;
    }
}

@media (max-width: 768px) {
    .message-wrapper {
        max-width: 85%;
    }
    
    .media-message {
        max-width: 250px;
    }
    
    .document-message {
        max-width: 300px;
    }
    
    .attachment-options {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .chats-header h1 {
        font-size: var(--font-lg);
    }
    
    .chat-title {
        font-size: var(--font-sm);
    }
    
    .message-wrapper {
        max-width: 90%;
    }
    
    .media-message {
        max-width: 200px;
    }
    
    .emoji-picker-container {
        width: 250px;
    }
    
    .voice-recorder {
        min-width: 250px;
        bottom: 80px;
    }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
    .chat-item,
    .btn,
    .nav-link,
    .dropdown-item {
        min-height: 48px;
        min-width: 48px;
    }
    
    .message-input-wrapper textarea {
        font-size: 16px; /* Prevents iOS zoom */
    }
    
    .emoji {
        min-width: 44px;
        min-height: 44px;
        line-height: 44px;
    }
    
    /* Prevent text selection on interactive elements */
    button,
    input,
    textarea,
    select {
        user-select: text;
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #ffffff;
        --text-secondary: #cccccc;
    }
    
    .btn-outline-secondary {
        border-width: 2px;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}