/* ============================================
   SAGE ChatApp - CSS Stylesheet
   Discord-inspired Dark Theme
   ============================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Primary Colors */
    --primary-bg: #1a1a2e;
    --secondary-bg: #16213e;
    --tertiary-bg: #0f3460;
    --accent-color: #00d4ff;
    --accent-secondary: #ff006e;
    --accent-tertiary: #8338ec;
    
    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #b0b3b8;
    --text-tertiary: #72767d;
    
    /* UI Colors */
    --border-color: #2c2f33;
    --hover-bg: #2c2f33;
    --success-color: #43b581;
    --warning-color: #faa61a;
    --danger-color: #f04747;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.7);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease-out;
}

body {
    font-family: 'Poppins', 'JetBrains Mono', sans-serif;
    background: var(--primary-bg);
    color: var(--text-primary);
    overflow: hidden;
}

/* ============================================
   AUTHENTICATION STYLES
   ============================================ */

.auth-container {
    position: fixed;
    width: 100%;
    height: 100vh;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 1000;
}

.auth-container.active {
    opacity: 1;
    visibility: visible;
}

.auth-wrapper {
    position: relative;
    z-index: 10;
    width: 100%;
    max-width: 420px;
    padding: 40px;
}

.form-container {
    animation: slideUp 0.5s ease-out;
    opacity: 0;
    visibility: hidden;
    position: absolute;
    width: 100%;
    transition: var(--transition);
}

.form-container.active {
    opacity: 1;
    visibility: visible;
    position: relative;
}

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

.form-header {
    text-align: center;
    margin-bottom: 40px;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
    font-size: 28px;
    font-weight: 700;
}

.logo i {
    color: var(--accent-color);
    font-size: 32px;
}

.form-header h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-tertiary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.form-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group label i {
    color: var(--accent-color);
    font-size: 14px;
}

.form-group input {
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    font-family: 'Poppins', sans-serif;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-color);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
}

.form-group input::placeholder {
    color: var(--text-tertiary);
}

.password-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.password-input-wrapper input {
    width: 100%;
}

.toggle-password {
    position: absolute;
    right: 12px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

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

.password-strength-meter {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 8px;
}

.strength-bar {
    flex: 1;
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    overflow: hidden;
}

.strength-bar::after {
    content: '';
    display: block;
    height: 100%;
    width: 0%;
    background: var(--danger-color);
    transition: var(--transition);
    border-radius: 2px;
}

.strength-text {
    font-size: 12px;
    color: var(--text-tertiary);
}

.btn-primary {
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-tertiary));
    border: none;
    border-radius: 8px;
    color: var(--primary-bg);
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-top: 10px;
    position: relative;
    overflow: hidden;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 212, 255, 0.3);
}

.btn-primary:active {
    transform: translateY(0);
}

.form-footer {
    text-align: center;
    margin-top: 20px;
    font-size: 14px;
    color: var(--text-secondary);
}

.link-button {
    background: none;
    border: none;
    color: var(--accent-color);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    text-decoration: none;
}

.link-button:hover {
    color: var(--accent-secondary);
    text-decoration: underline;
}

.auth-decorations {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    overflow: hidden;
    z-index: 1;
}

.shape {
    position: absolute;
    opacity: 0.1;
    animation: float 6s ease-in-out infinite;
}

.shape-1 {
    width: 300px;
    height: 300px;
    background: var(--accent-color);
    border-radius: 50%;
    top: -100px;
    right: -100px;
}

.shape-2 {
    width: 200px;
    height: 200px;
    background: var(--accent-tertiary);
    border-radius: 50%;
    bottom: -50px;
    left: -50px;
    animation-delay: 2s;
}

.shape-3 {
    width: 150px;
    height: 150px;
    background: var(--accent-secondary);
    border-radius: 50%;
    top: 50%;
    left: 10%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(30px); }
}

/* ============================================
   CHAT CONTAINER STYLES
   ============================================ */

.chat-container {
    display: flex;
    height: 100vh;
    width: 100%;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.chat-container.active {
    opacity: 1;
    visibility: visible;
}

/* ============================================
   SIDEBAR STYLES
   ============================================ */

.sidebar {
    width: 260px;
    background: var(--secondary-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

.sidebar::-webkit-scrollbar {
    width: 6px;
}

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

.sidebar::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

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

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 20px;
    font-weight: 700;
    flex: 1;
    cursor: pointer;
}

.sidebar-logo i {
    color: var(--accent-color);
    font-size: 24px;
}

.sidebar-actions {
    display: flex;
    gap: 8px;
}

.sidebar-btn {
    width: 36px;
    height: 36px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
}

.sidebar-btn:hover {
    background: var(--accent-color);
    color: var(--primary-bg);
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

.sidebar-search {
    padding: 12px 16px;
    margin: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    transition: var(--transition);
}

.sidebar-search:focus-within {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent-color);
}

.sidebar-search i {
    color: var(--text-tertiary);
    font-size: 14px;
}

.sidebar-search input {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 13px;
    outline: none;
}

.sidebar-search input::placeholder {
    color: var(--text-tertiary);
}

.channels-section {
    padding: 0 8px;
    margin-bottom: 20px;
}

.section-title {
    padding: 8px 12px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-tertiary);
    letter-spacing: 1px;
}

.channels-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.channel-item {
    padding: 8px 12px;
    margin: 0 4px;
    background: transparent;
    border: none;
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    text-align: left;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.channel-item i {
    font-size: 14px;
    flex-shrink: 0;
}

.channel-item:hover {
    background: var(--hover-bg);
    color: var(--text-primary);
}

.channel-item.active {
    background: linear-gradient(90deg, rgba(0, 212, 255, 0.2), transparent);
    color: var(--accent-color);
    border-left: 3px solid var(--accent-color);
    padding-left: 9px;
}

/* ============================================
   CHAT MAIN STYLES
   ============================================ */

.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--primary-bg);
    position: relative;
}

.chat-header {
    padding: 16px 24px;
    background: var(--secondary-bg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.header-left h1 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.channel-description {
    font-size: 13px;
    color: var(--text-tertiary);
}

.header-actions {
    display: flex;
    gap: 8px;
}

.header-btn {
    width: 40px;
    height: 40px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
}

.header-btn:hover {
    background: var(--accent-color);
    color: var(--primary-bg);
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

.messages-area {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

.messages-area::-webkit-scrollbar {
    width: 8px;
}

.messages-area::-webkit-scrollbar-track {
    background: transparent;
}

.messages-area::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.messages-area::-webkit-scrollbar-thumb:hover {
    background: var(--hover-bg);
}

.messages-welcome {
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--text-tertiary);
}

.welcome-icon {
    font-size: 80px;
    color: var(--accent-color);
    margin-bottom: 20px;
    opacity: 0.3;
}

.messages-welcome h2 {
    font-size: 24px;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

/* Message Styles */

.message {
    display: flex;
    gap: 12px;
    padding: 12px 0;
    animation: slideIn 0.3s ease-out;
}

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

.message.own {
    justify-content: flex-end;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-tertiary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-bg);
    font-weight: 600;
    font-size: 16px;
    flex-shrink: 0;
    cursor: pointer;
    transition: var(--transition);
}

.message-avatar:hover {
    transform: scale(1.1);
}

.message-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
    max-width: 50%;
}

.message.own .message-content {
    align-items: flex-end;
}

.message-header {
    display: flex;
    align-items: center;
    gap: 8px;
}

.message-author {
    font-weight: 600;
    font-size: 14px;
    color: var(--text-primary);
}

.message-time {
    font-size: 12px;
    color: var(--text-tertiary);
}

.message-text {
    background: var(--secondary-bg);
    padding: 10px 14px;
    border-radius: 12px;
    word-wrap: break-word;
    font-size: 14px;
    line-height: 1.5;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.message.own .message-text {
    background: var(--accent-color);
    color: var(--primary-bg);
    border-color: var(--accent-color);
}

.message-text:hover {
    background: var(--hover-bg);
}

.message.own .message-text:hover {
    background: rgba(0, 212, 255, 0.8);
}

/* ============================================
   MESSAGE INPUT STYLES
   ============================================ */

.message-input-area {
    padding: 20px 24px;
    border-top: 1px solid var(--border-color);
    background: var(--secondary-bg);
    display: flex;
    align-items: flex-end;
    gap: 12px;
}

.input-actions {
    display: flex;
    gap: 8px;
}

.action-btn {
    width: 36px;
    height: 36px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
}

.action-btn:hover {
    background: var(--accent-color);
    color: var(--primary-bg);
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

.input-wrapper {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
}

.message-input {
    width: 100%;
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    font-family: 'Poppins', sans-serif;
    transition: var(--transition);
    resize: none;
    max-height: 100px;
}

.message-input:focus {
    outline: none;
    border-color: var(--accent-color);
    background: rgba(255, 255, 255, 0.08);
}

.message-input::placeholder {
    color: var(--text-tertiary);
}

.input-focus-line {
    position: absolute;
    bottom: -1px;
    left: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
    width: 100%;
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.message-input:focus ~ .input-focus-line {
    transform: scaleX(1);
}

.send-btn {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-tertiary));
    border: none;
    border-radius: 6px;
    color: var(--primary-bg);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
}

.send-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 212, 255, 0.3);
}

.send-btn:active {
    transform: translateY(0);
}

/* ============================================
   RIGHT SIDEBAR - MEMBERS
   ============================================ */

.right-sidebar {
    width: 260px;
    background: var(--secondary-bg);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transform: translateX(100%);
    transition: var(--transition);
    position: absolute;
    right: 0;
    top: 0;
    height: 100%;
    z-index: 100;
}

.right-sidebar.active {
    transform: translateX(0);
}

@media (min-width: 1400px) {
    .right-sidebar {
        position: relative;
        transform: translateX(0);
    }

    .right-sidebar.active {
        transform: translateX(0);
    }
}

.right-sidebar .sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
}

.close-btn {
    width: 32px;
    height: 32px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    display: none;
}

@media (max-width: 1400px) {
    .close-btn {
        display: flex;
    }
}

.close-btn:hover {
    background: var(--hover-bg);
    color: var(--text-primary);
}

.members-list {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.member-item {
    padding: 8px 12px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    transition: var(--transition);
    background: transparent;
    border: 1px solid transparent;
}

.member-item:hover {
    background: var(--hover-bg);
    border-color: var(--border-color);
}

.member-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-tertiary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-bg);
    font-weight: 600;
    font-size: 14px;
    flex-shrink: 0;
}

.member-info h4 {
    font-size: 13px;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.member-status {
    font-size: 11px;
    color: var(--text-tertiary);
}

/* ============================================
   FLOATING ACTION BUTTON & USER MENU
   ============================================ */

.fab-menu {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-tertiary));
    border: none;
    color: var(--primary-bg);
    cursor: pointer;
    font-size: 24px;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
    z-index: 500;
    display: flex;
    align-items: center;
    justify-content: center;
}

.fab-menu:hover {
    transform: scale(1.1) translateY(-5px);
    box-shadow: 0 12px 40px rgba(0, 212, 255, 0.4);
}

.fab-menu:active {
    transform: scale(0.95);
}

.user-menu {
    position: fixed;
    bottom: 100px;
    right: 30px;
    width: 240px;
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    z-index: 500;
    animation: slideUp 0.3s ease-out;
    display: none;
}

.user-menu.active {
    display: block;
}

.user-menu-header {
    padding: 16px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(131, 56, 236, 0.1));
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-tertiary));
    flex-shrink: 0;
}

.user-info h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 2px;
}

.user-info .status {
    font-size: 12px;
    color: var(--success-color);
}

.user-menu-items {
    display: flex;
    flex-direction: column;
}

.menu-item {
    padding: 12px 16px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    text-align: left;
    font-size: 13px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
}

.menu-item:hover {
    background: var(--hover-bg);
    color: var(--text-primary);
}

.menu-item i {
    width: 18px;
    text-align: center;
    color: var(--accent-color);
}

.menu-item.logout {
    color: var(--danger-color);
    border-top: 1px solid var(--border-color);
}

.menu-item.logout:hover {
    background: rgba(240, 71, 71, 0.1);
}

.menu-item.logout i {
    color: var(--danger-color);
}

/* ============================================
   NOTIFICATIONS
   ============================================ */

.notification-container {
    position: fixed;
    top: 20px;
    right: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 2000;
}

.notification {
    padding: 14px 20px;
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    min-width: 300px;
    box-shadow: var(--shadow-md);
    animation: slideInRight 0.3s ease-out;
    display: flex;
    align-items: center;
    gap: 12px;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.notification i {
    font-size: 18px;
    flex-shrink: 0;
}

.notification.success {
    border-color: var(--success-color);
}

.notification.success i {
    color: var(--success-color);
}

.notification.error {
    border-color: var(--danger-color);
}

.notification.error i {
    color: var(--danger-color);
}

.notification.warning {
    border-color: var(--warning-color);
}

.notification.warning i {
    color: var(--warning-color);
}

/* ============================================
   LOADING SPINNER
   ============================================ */

.loading-spinner {
    position: fixed;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.loading-spinner.active {
    opacity: 1;
    visibility: visible;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* ============================================
   SHIMMER LOADING SKELETONS
   ============================================ */

.shimmer-wrapper {
    position: relative;
    overflow: hidden;
    background-color: var(--hover-bg);
    border-radius: 4px;
}

.shimmer-wrapper::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 200%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.05) 50%,
        transparent 100%
    );
    animation: shimmer 1.5s infinite linear;
}

@keyframes shimmer {
    0% { transform: translateX(0); }
    100% { transform: translateX(100%); }
}

.shimmer-channel {
    height: 36px;
    margin: 4px 8px;
    border-radius: 6px;
    background-color: rgba(255,255,255,0.03);
}

.shimmer-message {
    display: flex;
    gap: 12px;
    padding: 12px;
}

.shimmer-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255,255,255,0.03);
    flex-shrink: 0;
}

.shimmer-lines {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
    justify-content: center;
}

.shimmer-line {
    height: 10px;
    background-color: rgba(255,255,255,0.03);
    border-radius: 4px;
}

.shimmer-line.short { width: 30%; }
.shimmer-line.medium { width: 60%; }
.shimmer-line.long { width: 90%; }

.shimmer-member {
    display: flex;
    gap: 12px;
    padding: 10px;
    align-items: center;
}
.shimmer-member .shimmer-avatar {
    width: 32px;
    height: 32px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 1200px) {
    .sidebar {
        width: 220px;
    }

    .message-content {
        max-width: 60%;
    }
}

@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: -260px;
        height: 100vh;
        z-index: 200;
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
    }

    .sidebar.mobile-active {
        left: 0;
    }

    .message-content {
        max-width: 70%;
    }

    .right-sidebar {
        position: fixed;
        right: -260px;
        height: 100vh;
        z-index: 200;
        transition: var(--transition);
    }

    .right-sidebar.active {
        right: 0;
    }

    .chat-header {
        height: auto;
        flex-wrap: wrap;
        padding: 12px 16px;
    }

    .header-left {
        flex: 1;
        min-width: 200px;
    }

    .message-input-area {
        flex-wrap: wrap;
        padding: 12px 16px;
    }

    .input-actions {
        order: 1;
        width: 100%;
        margin-bottom: 8px;
    }

    .input-wrapper {
        order: 2;
        flex: 1;
        min-width: 200px;
    }

    .send-btn {
        order: 3;
    }
}

@media (max-width: 480px) {
    .auth-wrapper {
        padding: 20px;
    }

    .form-header h2 {
        font-size: 24px;
    }

    .message-content {
        max-width: 85%;
    }

    .fab-menu {
        width: 50px;
        height: 50px;
        bottom: 20px;
        right: 20px;
        font-size: 20px;
    }

    .notification {
        min-width: 250px;
        font-size: 12px;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.hidden {
    display: none !important;
}

.opacity-50 {
    opacity: 0.5;
}

.blur {
    filter: blur(4px);
}

/* Scrollbar Styling */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

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

/* Selection Styling */

::selection {
    background: var(--accent-color);
    color: var(--primary-bg);
}

::-moz-selection {
    background: var(--accent-color);
    color: var(--primary-bg);
}