node-realtime-chat-app/public/css/styles.css

/* Modern Chat App Styles */

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

:root {
    --primary-color: #667eea;
    --primary-dark: #5a6fd8;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --text-primary: #2d3748;
    --text-secondary: #718096;
    --bg-primary: #ffffff;
    --bg-secondary: #f7fafc;
    --bg-dark: #2d3748;
    --border-color: #e2e8f0;
    --success-color: #48bb78;
    --error-color: #f56565;
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --border-radius: 12px;
    --border-radius-sm: 8px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: 1.875rem;
    color: var(--text-primary);
}

/* Form Elements */
input, button, textarea {
    font-family: inherit;
    font-size: 1rem;
    border-radius: var(--border-radius-sm);
    transition: all 0.3s ease;
}

input {
    border: 2px solid var(--border-color);
    padding: 1rem 1.25rem;
    outline: none;
    background: var(--bg-primary);
    color: var(--text-primary);
    width: 100%;
    font-size: 1rem;
}

input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    transform: translateY(-1px);
}

button {
    cursor: pointer;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    color: white;
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--border-radius-sm);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

button::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 0.5s;
}

button:hover::before {
    left: 100%;
}

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

button:active {
    transform: translateY(0);
}

button:disabled {
    cursor: not-allowed;
    opacity: 0.6;
    transform: none;
    box-shadow: none;
}

button:disabled::before {
    display: none;
}

label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Join Page Styles */
.centered-form {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    position: relative;
    overflow: hidden;
}

.centered-form::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="50" cy="10" r="0.5" fill="rgba(255,255,255,0.1)"/><circle cx="10" cy="60" r="0.5" fill="rgba(255,255,255,0.1)"/><circle cx="90" cy="40" r="0.5" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.centered-form__box {
    background: var(--bg-primary);
    padding: 3rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
    position: relative;
    z-index: 1;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.centered-form__box h1 {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 2.5rem;
}

.centered-form form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.centered-form input {
    margin-bottom: 0;
}

.centered-form button {
    margin-top: 1rem;
    width: 100%;
    padding: 1.25rem;
    font-size: 1.1rem;
}

/* Chat Page Layout */
.chat {
    display: flex;
    height: 100vh;
    background: var(--bg-secondary);
}

.chat__sidebar {
    width: 300px;
    background: var(--bg-dark);
    color: white;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
}

.chat__main {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
}

/* Sidebar Styles */
.sidebar-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    padding: 2rem 1.5rem 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.room-title {
    font-size: 1.25rem;
    color: white;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.room-title i {
    font-size: 1.1rem;
}

.sidebar-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.list-title {
    padding: 1.5rem 1.5rem 1rem;
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.8);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.list-title i {
    font-size: 0.9rem;
}

.users {
    list-style: none;
    padding: 1rem 1.5rem;
    flex: 1;
    overflow-y: auto;
    margin: 0;
}

.user-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    margin-bottom: 0.5rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-sm);
    border-left: 3px solid var(--primary-color);
    transition: all 0.3s ease;
    position: relative;
}

.user-item:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateX(5px);
}

.user-name {
    flex: 1;
    color: white;
    font-weight: 500;
}

.current-user-badge {
    background: var(--accent-color);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Messages Area */
.chat__messages {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
    background: var(--bg-secondary);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.message {
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--primary-color);
    transition: all 0.3s ease;
    max-width: 80%;
    animation: slideIn 0.3s ease-out;
    position: relative;
}

.message.own-message {
    align-self: flex-end;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-left-color: var(--accent-color);
}

.message.own-message .message__name,
.message.own-message .message__meta {
    color: rgba(255, 255, 255, 0.9);
}

.message.own-message .message__content p {
    color: white;
}



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

.message__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.message__name {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.message__meta {
    color: var(--text-secondary);
    font-size: 0.75rem;
}

.message__content {
    margin-top: 0.5rem;
}

.message__content p {
    color: var(--text-primary);
    line-height: 1.6;
    margin: 0;
}



/* Logo and Header Styles */
.logo-container {
    text-align: center;
    margin-bottom: 2rem;
}

.logo-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    animation: bounce 2s infinite;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-top: 0.5rem;
}

.input-group {
    position: relative;
    margin-bottom: 1.5rem;
}

.input-group.focused label {
    color: var(--primary-color);
}

.input-group label i {
    margin-right: 0.5rem;
    color: var(--primary-color);
}

.features {
    display: flex;
    justify-content: space-around;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.feature i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

/* Chat Header */
.chat__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-content h2 {
    margin: 0;
    color: var(--text-primary);
    font-size: 1.5rem;
}

.connection-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success-color);
    animation: pulse 2s infinite;
}

.status-indicator.offline {
    background: var(--error-color);
}

.back-btn {
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--error-color), #e53e3e);
    font-size: 0.875rem;
}

.back-btn:hover {
    background: linear-gradient(135deg, #e53e3e, var(--error-color));
}

/* Welcome Message */
.welcome-message {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--text-secondary);
    animation: fadeIn 1s ease-out;
}

.welcome-message i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.welcome-message h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

/* Compose Area */
.compose {
    padding: 1.5rem 2rem;
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    box-shadow: 0 -4px 6px -1px rgba(0, 0, 0, 0.1);
}

.input-wrapper {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 0.5rem;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.input-wrapper:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.input-wrapper input {
    flex: 1;
    border: none;
    background: transparent;
    padding: 1rem;
    margin: 0;
    box-shadow: none;
}

.input-wrapper input:focus {
    border: none;
    box-shadow: none;
    transform: none;
}

.input-wrapper button {
    padding: 1rem;
    border-radius: var(--border-radius-sm);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    min-width: 50px;
}



/* Animations */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(72, 187, 120, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(72, 187, 120, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(72, 187, 120, 0);
    }
}

@keyframes typing {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .chat {
        flex-direction: column;
    }
    
    .chat__sidebar {
        width: 100%;
        height: auto;
        max-height: 200px;
    }
    
    .centered-form__box {
        margin: 1rem;
        padding: 2rem;
    }
    
    .compose form {
        flex-direction: column;
    }
    
    .message {
        max-width: 95%;
    }
    
    h1 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .centered-form {
        padding: 1rem;
    }
    
    .centered-form__box {
        padding: 1.5rem;
    }
    
    .chat__messages {
        padding: 1rem;
    }
    
    .compose {
        padding: 1rem;
    }
}

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

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

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

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

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

/* Success/Error States */
.success {
    border-left-color: var(--success-color) !important;
}

.error {
    border-left-color: var(--error-color) !important;
}

/* Typing Indicator */
.typing-indicator {
    padding: 1rem;
    color: var(--text-secondary);
    font-style: italic;
    font-size: 0.875rem;
}

/* Online Status */
.online-indicator {
    display: inline-block;
    width: 8px;
    height: 8px;
    background: var(--success-color);
    border-radius: 50%;
    margin-right: 0.5rem;
    animation: pulse 2s infinite;
}

/* Notification System */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--bg-primary);
    color: var(--text-primary);
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    border-left: 4px solid var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    z-index: 1000;
    animation: slideInRight 0.3s ease-out;
    max-width: 400px;
}

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

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

.notification-warning {
    border-left-color: #f6ad55;
}

.notification-info {
    border-left-color: var(--primary-color);
}

.notification i:first-child {
    font-size: 1.2rem;
}

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

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

.notification-warning i:first-child {
    color: #f6ad55;
}

.notification-info i:first-child {
    color: var(--primary-color);
}

.notification button {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 50%;
    transition: all 0.3s ease;
    margin-left: auto;
}

.notification button:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

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

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(72, 187, 120, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(72, 187, 120, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(72, 187, 120, 0);
    }
}