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

:root {
    --bg-primary: #0f0f23;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #252547;
    --text-primary: #ffffff;
    --text-secondary: #b0b0d0;
    --text-muted: #8888aa;
    --accent-primary: #6c63ff;
    --accent-secondary: #4a44c6;
    --accent-success: #2ecc71;
    --accent-danger: #e74c3c;
    --accent-warning: #f39c12;
    --border-color: #2d2d5a;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --radius: 12px;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
    line-height: 1.6;
}

/* API Status */
.api-status-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}

.api-status {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    background: var(--bg-secondary);
    border-radius: 20px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.api-status-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    transition: var(--transition);
}

.api-status-indicator.connected {
    background: var(--accent-success);
    box-shadow: 0 0 10px var(--accent-success);
    animation: pulse 2s infinite;
}

.api-status-indicator.disconnected {
    background: var(--accent-danger);
    box-shadow: 0 0 10px var(--accent-danger);
}

.api-status-indicator.checking {
    background: var(--accent-warning);
    box-shadow: 0 0 10px var(--accent-warning);
    animation: pulse 1s infinite;
}

.api-status-text {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

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

/* Auth Container */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    padding: 20px;
    background: linear-gradient(135deg, var(--bg-primary) 0%, #1a1a3a 100%);
}

.auth-wrapper {
    width: 100%;
    max-width: 440px;
}

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

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 15px;
}

.logo i {
    font-size: 42px;
    color: var(--accent-primary);
}

.logo h1 {
    font-size: 36px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    color: var(--text-secondary);
    font-size: 16px;
}

.auth-card {
    background: var(--bg-secondary);
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    padding: 5px;
    background: var(--bg-tertiary);
    border-radius: 10px;
}

.tab {
    flex: 1;
    padding: 12px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    border-radius: 8px;
    transition: var(--transition);
}

.tab.active {
    background: var(--accent-primary);
    color: white;
}

.form {
    display: none;
}

.form.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

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

.form h2 {
    font-size: 24px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.form-subtitle {
    color: var(--text-secondary);
    margin-bottom: 30px;
    font-size: 14px;
}

.input-group {
    margin-bottom: 24px;
}

.input-group label {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
}

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

.input-group input {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 16px;
    transition: var(--transition);
}

.input-group input:focus {
    outline: none;
    border-color: var(--accent-primary);
    background: var(--bg-secondary);
}

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

.error-message {
    color: var(--accent-danger);
    font-size: 12px;
    margin-top: 6px;
    min-height: 18px;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 14px;
}

.checkbox input {
    width: 18px;
    height: 18px;
    accent-color: var(--accent-primary);
}

.terms-link {
    color: var(--accent-primary);
    text-decoration: none;
}

.terms-link:hover {
    text-decoration: underline;
}

.btn-primary {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(108, 99, 255, 0.4);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.auth-footer {
    text-align: center;
    margin-top: 30px;
    color: var(--text-muted);
    font-size: 14px;
}

/* Chat Container */
.chat-container {
    display: flex;
    height: 100vh;
    background: var(--bg-primary);
}

/* Sidebar */
.sidebar {
    width: 280px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 12px;
}

.avatar {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 18px;
    color: white;
}

.user-details h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.user-status {
    font-size: 12px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.user-status .online {
    color: var(--accent-success);
    font-size: 10px;
}

.btn-logout {
    width: 36px;
    height: 36px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.sidebar-section {
    flex: 1;
    padding: 24px;
    overflow-y: auto;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.section-header h4 {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.badge {
    background: var(--accent-primary);
    color: white;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 20px;
    min-width: 24px;
    text-align: center;
}

.users-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.user-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--bg-tertiary);
    border-radius: 8px;
    transition: var(--transition);
}

.user-item:hover {
    background: var(--border-color);
    transform: translateX(4px);
}

.user-item .avatar {
    width: 36px;
    height: 36px;
    font-size: 14px;
}

.user-item .user-details h3 {
    font-size: 14px;
    margin-bottom: 2px;
}

.user-item .user-status {
    font-size: 11px;
}

.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 36px;
    margin-bottom: 12px;
    opacity: 0.5;
}

.empty-state p {
    font-size: 14px;
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
}

.connection-status {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-secondary);
}

.connection-status i {
    color: var(--accent-success);
}

.connection-status i.disconnected {
    color: var(--accent-danger);
}

/* Main Chat Area */
.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

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

.chat-info h2 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.btn-icon {
    width: 40px;
    height: 40px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

/* Messages Container */
.messages-container {
    flex: 1;
    padding: 24px;
    overflow-y: auto;
    background: var(--bg-primary);
}

.welcome-screen {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.welcome-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 30px;
    font-size: 36px;
    color: white;
}

.welcome-screen h2 {
    font-size: 28px;
    color: var(--text-primary);
    margin-bottom: 12px;
    font-weight: 600;
}

.welcome-screen p {
    font-size: 16px;
    margin-bottom: 40px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.welcome-features {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 40px;
    flex-wrap: wrap;
}

.feature {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--accent-primary);
    font-weight: 500;
    font-size: 14px;
}

.feature i {
    font-size: 18px;
}

.messages-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.message {
    max-width: 70%;
    padding: 16px 20px;
    border-radius: 18px;
    position: relative;
    animation: messageAppear 0.3s ease;
}

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

.message.sent {
    align-self: flex-end;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: white;
    border-bottom-right-radius: 5px;
}

.message.received {
    align-self: flex-start;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-bottom-left-radius: 5px;
}

.message-sender {
    font-weight: 600;
    margin-bottom: 6px;
    font-size: 13px;
    color: var(--accent-primary);
}

.message-content {
    margin-bottom: 8px;
    line-height: 1.5;
    word-wrap: break-word;
}

.message-time {
    font-size: 11px;
    opacity: 0.8;
    text-align: right;
    font-weight: 500;
}

.message.received .message-time {
    color: var(--text-muted);
}

/* Message Input */
.message-input-container {
    padding: 20px 24px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 16px;
}

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

#message-input {
    width: 100%;
    padding: 16px 20px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 16px;
    transition: var(--transition);
}

#message-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    background: var(--bg-secondary);
}

#message-input:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.typing-indicator {
    position: absolute;
    bottom: -25px;
    left: 0;
    font-size: 12px;
    color: var(--accent-primary);
    font-style: italic;
    animation: fadeInOut 1.5s ease-in-out infinite;
    display: none;
}

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

.btn-send {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    color: white;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.btn-send:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(108, 99, 255, 0.4);
}

.btn-send:disabled {
    background: var(--text-muted);
    cursor: not-allowed;
    opacity: 0.7;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 15, 35, 0.95);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    backdrop-filter: blur(10px);
}

.spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}

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

.loading-overlay p {
    color: var(--text-secondary);
    font-size: 16px;
}

/* Notifications */
.notification-container {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 400px;
}

.notification {
    padding: 16px 20px;
    background: var(--bg-secondary);
    border-radius: 12px;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--accent-primary);
    animation: slideInLeft 0.3s ease;
    display: flex;
    align-items: center;
    gap: 15px;
    border: 1px solid var(--border-color);
}

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

.notification i {
    color: var(--accent-primary);
    font-size: 20px;
}

.notification-content {
    flex: 1;
}

.notification-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    font-size: 14px;
}

.notification-message {
    font-size: 13px;
    color: var(--text-secondary);
}

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

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

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

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

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

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

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

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

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

/* Responsive */
@media (max-width: 768px) {
    .chat-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .sidebar-section {
        max-height: 200px;
    }
    
    .api-status-container {
        top: 10px;
        right: 10px;
    }
    
    .api-status {
        padding: 8px 12px;
    }
    
    .auth-card {
        padding: 30px 24px;
    }
    
    .welcome-features {
        flex-direction: column;
        gap: 15px;
    }
}

/* Hide API status in chat room */
.chat-container .api-status-container {
    display: none !important;
}

/* Show API status only on auth page */
.auth-container .api-status-container {
    display: flex;
}