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

body {
    width: 100%;
    min-height: 100vh;
    overflow-x: hidden;
    background: rgba(16, 16, 24, 0.99);
    display: flex;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(16, 16, 24, 0.99);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 40px;
}

.loading-logo {
    max-width: 300px;
    height: auto;
    object-fit: contain;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

.loading-bar-container {
    width: 300px;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    overflow: hidden;
    position: relative;
}

.loading-bar {
    height: 100%;
    width: 0%;
    background: #8300ce;
    border-radius: 3px;
    transition: width 0.3s ease;
    position: relative;
    overflow: hidden;
}

.loading-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent
    );
    animation: shimmer 1.5s infinite;
}

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

.loading-text {
    color: #d0d0d0;
    font-size: 0.9em;
    text-align: center;
    min-height: 20px;
}

/* Main Content Wrapper */
.main-content {
    flex: 1;
    min-height: 100vh;
    margin-left: 240px; /* Sidebar width */
    padding-right: 24px;
    display: flex;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.main-content.loaded {
    opacity: 1;
}

.content-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0; /* Allow flex item to shrink below content size */
    position: relative;
}

/* Sidebar Navigation */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: 240px;
    height: 100vh;
    background: rgba(8, 8, 12, 0.98);
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    flex-direction: column;
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.sidebar.loaded {
    opacity: 1;
}

.sidebar-logo {
    padding: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: center;
    align-items: center;
}

.logo-img {
    max-width: 100%;
    height: auto;
    max-height: 120px;
    object-fit: contain;
}

.sidebar-content {
    flex: 1;
    padding: 20px 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sidebar-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    color: #d0d0d0;
    font-size: 0.85em;
    font-weight: 500;
    transition: all 0.2s ease;
    border: none;
    background: none;
    text-align: left;
    width: 100%;
    cursor: pointer;
    text-decoration: none;
}

.sidebar-item:hover {
    background: rgba(102, 126, 234, 0.1);
    color: #fff;
}

.sidebar-item.online-users {
    cursor: default;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 16px;
    margin-bottom: 8px;
}

.sidebar-item.online-users:hover {
    background: none;
}

.sidebar-icon {
    font-size: 1.1em;
    width: 24px;
    text-align: center;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #8b9cff;
    transition: color 0.2s ease;
}

.sidebar-item:hover .sidebar-icon {
    color: #fff;
}

.sidebar-text {
    flex: 1;
}

.sidebar-button {
    border-radius: 0;
}

.sidebar-link {
    text-decoration: none;
}

#onlineUsersCount {
    color: #4caf50;
    font-weight: 600;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.modal-content {
    background: rgba(18, 18, 23, 0.98);
    margin: 5% auto;
    padding: 30px;
    border: 1px solid rgba(102, 126, 234, 0.3);
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
}

.modal-close {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 28px;
    font-weight: bold;
    color: #888;
    cursor: pointer;
    transition: color 0.2s ease;
}

.modal-close:hover {
    color: #fff;
}

.modal-content h2 {
    color: #fff;
    font-size: 1.5em;
    margin-bottom: 20px;
    font-weight: 600;
}

.modal-body {
    color: #d0d0d0;
    line-height: 1.6;
}

.modal-body h3 {
    color: #fff;
    font-size: 1.1em;
    margin-top: 20px;
    margin-bottom: 10px;
    font-weight: 600;
}

.modal-body p {
    margin-bottom: 15px;
}

.modal-body ul,
.modal-body ol {
    margin-left: 20px;
    margin-bottom: 15px;
}

.modal-body li {
    margin-bottom: 8px;
}

.modal-body strong {
    color: #fff;
}

/* Chat Panel */
.chat-panel {
    width: 360px;
    min-width: 180px;
    max-width: 360px;
    height: 85vh;
    max-height: 85vh;
    position: sticky;
    top: 76px;
    background: rgba(8, 8, 12, 0.98);
    border-left: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    align-self: flex-start;
    overflow: hidden;
}

.chat-header {
    padding: 16px 20px;
    background: rgba(36, 36, 48, 0.8);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.chat-title {
    font-size: 0.9em;
    font-weight: 600;
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.chat-icon {
    color: #8b9cff;
    font-size: 1em;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
}

.chat-messages::-webkit-scrollbar-thumb {
    background: rgba(102, 126, 234, 0.3);
    border-radius: 3px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: rgba(102, 126, 234, 0.5);
}

.chat-welcome {
    color: #888;
    font-size: 0.85em;
    text-align: center;
    padding: 20px;
    font-style: italic;
}

.chat-message {
    display: flex;
    flex-direction: row;
    gap: 10px;
    padding: 8px 0;
    animation: fadeIn 0.2s ease;
}

.chat-message-avatar-container {
    flex-shrink: 0;
    width: 42px;
    height: 42px;
}

.chat-message-avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid rgba(102, 126, 234, 0.3);
    background: rgba(255, 255, 255, 0.05);
}

.chat-message-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0; /* Allow text to wrap */
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.chat-message-username {
    font-size: 0.8em;
    font-weight: 600;
    color: #8b9cff;
}

.chat-message-time {
    font-size: 0.7em;
    color: #666;
}

.chat-message-text {
    font-size: 0.85em;
    color: #d0d0d0;
    line-height: 1.4;
    word-wrap: break-word;
}

.chat-input-container {
    padding: 16px;
    background: rgba(8, 8, 12, 0.98);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    gap: 8px;
    position: relative;
}

.chat-input {
    flex: 1;
    padding: 10px 14px;
    background: rgba(36, 36, 48, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: #fff;
    font-size: 0.85em;
    outline: none;
    transition: all 0.2s ease;
}

.chat-input:focus {
    border-color: rgba(102, 126, 234, 0.5);
    background: rgba(255, 255, 255, 0.08);
}

.chat-input::placeholder {
    color: #666;
}

.chat-send-btn {
    padding: 10px 16px;
    background: #8300ce;
    border: none;
    border-radius: 8px;
    color: white;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chat-send-btn:hover:not(:disabled) {
    transform: translateY(-1px);
}

.chat-send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Responsive Design */
/* Large laptop screens (1400px - 1440px) */
@media (max-width: 1440px) {
    .sidebar {
        width: 200px;
    }
    
    .main-content {
        margin-left: 200px;
    }
    
    .chat-panel {
        width: 280px;
        max-width: 280px;
        height: 85vh;
        max-height: 85vh;
    }
    
    .chat-header {
        padding: 12px 16px;
    }
    
    .chat-title {
        font-size: 0.85em;
    }
    
    .chat-input-container {
        padding: 12px;
        gap: 6px;
    }
    
    .chat-input {
        padding: 9px 12px;
        font-size: 0.8em;
    }
    
    .chat-send-btn {
        padding: 9px 12px;
        min-width: 40px;
    }
    
    .chat-send-btn i {
        font-size: 0.9em;
    }
    
    .chat-messages {
        padding: 12px;
    }
}

/* Medium laptop screens (1280px - 1400px) */
@media (max-width: 1400px) {
    .sidebar {
        width: 200px;
    }
    
    .main-content {
        margin-left: 200px;
        padding-right: 16px;
    }
    
    .chat-panel {
        width: 240px;
        max-width: 240px;
        height: 85vh;
        max-height: 85vh;
    }
    
    .chat-input-container {
        padding: 10px;
        gap: 6px;
    }
    
    .chat-input {
        padding: 8px 10px;
        font-size: 0.78em;
    }
    
    .chat-send-btn {
        padding: 8px 10px;
        min-width: 38px;
    }
    
    .chat-send-btn i {
        font-size: 0.85em;
    }
}

/* Small laptop screens (1024px - 1280px) */
@media (max-width: 1280px) {
    .sidebar {
        width: 200px;
    }
    
    .main-content {
        margin-left: 200px;
        padding-right: 12px;
    }
    
    .chat-panel {
        width: 200px;
        max-width: 200px;
        height: 85vh;
        max-height: 85vh;
    }
    
    .chat-header {
        padding: 10px 12px;
    }
    
    .chat-title {
        font-size: 0.75em;
    }
    
    .chat-input {
        padding: 8px 10px;
        font-size: 0.75em;
    }
    
    .chat-send-btn {
        padding: 8px 10px;
        min-width: 36px;
    }
    
    .chat-send-btn i {
        font-size: 0.8em;
    }
    
    .chat-message-avatar-container {
        width: 36px;
        height: 36px;
    }
    
    .chat-message-avatar {
        width: 36px;
        height: 36px;
    }
    
    .chat-messages {
        padding: 10px;
        gap: 8px;
    }
}

@media (max-width: 1024px) {
    .sidebar {
        width: 200px;
    }
    
    .main-content {
        margin-left: 200px;
        padding-right: 8px;
    }
    
    .chat-panel {
        width: 180px;
        max-width: 180px;
        height: 85vh;
        max-height: 85vh;
    }
    
    .chat-message-text {
        font-size: 0.75em;
    }
    
    .chat-message-username {
        font-size: 0.7em;
    }
    
    .chat-message-time {
        font-size: 0.65em;
    }
    
    .chat-input-container {
        padding: 10px;
        gap: 5px;
    }
    
    .chat-input {
        padding: 7px 9px;
        font-size: 0.72em;
    }
    
    .chat-send-btn {
        padding: 7px 9px;
        min-width: 34px;
    }
    
    .chat-send-btn i {
        font-size: 0.75em;
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 200px;
    }
    
    .main-content {
        margin-left: 200px;
    }
    
    .chat-panel {
        width: 200px;
        max-width: 200px;
        height: 85vh;
        max-height: 85vh;
    }
    
    .sidebar-logo {
        padding: 15px;
    }
    
    .logo-img {
        max-height: 80px;
    }
    
    .sidebar-item {
        padding: 10px 15px;
        font-size: 0.8em;
    }
    
    .modal-content {
        margin: 10% auto;
        padding: 20px;
        width: 95%;
    }
}

@media (max-width: 480px) {
    .sidebar {
        width: 180px;
    }
    
    .main-content {
        margin-left: 180px;
    }
    
    .sidebar-item {
        padding: 8px 12px;
        font-size: 0.75em;
    }
    
    .sidebar-icon {
        font-size: 1em;
        width: 20px;
    }
}

/* Game Canvas Styles */
.canvas-container {
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 10px;
    position: relative;
    box-sizing: border-box;
    overflow: hidden;
}

#gameCanvas {
    width: 100%;
    height: 100%;
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    display: block;
    background: #1a1a1a;
    border-radius: 8px;
}