:root {
    --primary-color: #0f0f0f;
    --secondary-color: #1b1b1b;
    --accent-color: #3498db;
    --text-color: #8b8b8b;
    --text-hover: #ffffff;
    --nav-width: 240px;
    --hover-bg: #1b1b1b;
    --border-color: #1b1b1b;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background-color: var(--secondary-color);
    color: var(--text-color);
}

.container {
    display: flex;
    width: calc(100% - 250px);
    margin-top: 45px;
}

/* Side Navigation */
.side-nav {
    width: var(--nav-width);
    background-color: var(--primary-color);
    padding: 1rem 0;
    position: fixed;
    height: 100vh;
    left: 0;
    top: 0;
    border-right: 1px solid var(--border-color);
    margin-top: 0;
    padding-top: 3.5rem;
}

.side-nav .logo {
    text-align: center;
    font-size: 1.5rem;
    font-weight: bold;
    padding: 1rem;
    margin-bottom: 2rem;
    color: var(--text-hover);
}

.side-nav ul {
    list-style: none;
}

.side-nav ul li {
    margin: 0.5rem 0;
}

.side-nav a {
    color: var(--text-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.side-nav a:before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 3px;
    background-color: var(--accent-color);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
}

.side-nav a:hover {
    background-color: var(--hover-bg);
    color: var(--text-hover);
    padding-left: 2rem;
}

.side-nav a:hover:before {
    transform: translateX(0);
}

.side-nav i {
    width: 20px;
    margin-right: 10px;
    transition: transform 0.3s ease;
}

.side-nav a:hover i {
    transform: scale(1.2);
}

/* Active menu item */
.side-nav a.active {
    background-color: var(--hover-bg);
    color: var(--text-hover);
}

.side-nav a.active:before {
    transform: translateX(0);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 20px;
    margin-left: var(--nav-width);
    margin-right: 250px;
}

#hero {
    padding: 2rem;
    background-color: var(--primary-color);
    border-radius: 8px;
    margin-bottom: 2rem;
}

#hero h1 {
    color: var(--text-hover);
    margin-bottom: 1rem;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    margin-top: 2rem;
    background-color: var(--accent-color);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    transition: transform 0.3s;
}

.cta-button:hover {
    transform: translateY(-2px);
}

.challenge-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 2rem 5%;
}

/* Reset all user menu styles */
body .user-menu,
body .user-menu *,
body .user-menu-content,
body .user-menu-content *,
body .user-menu-item,
body .user-menu-item * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    display: block !important;
    flex: none !important;
    float: none !important;
}

/* User Menu Base */
body .user-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 240px;
    background: var(--primary-color);
    z-index: 1000;
}

/* Header */
body .user-menu .user-menu-header {
    width: 100%;
    padding: 12px 20px;
    color: var(--text-hover);
    font-weight: bold;
    font-size: 1.1rem;
    border-bottom: 1px solid var(--border-color);
}

/* Content Container */
body .user-menu .user-menu-content {
    width: 100%;
    display: block !important;
    padding: 0 !important;
    gap: 0 !important;
    flex: none !important;
    float: none !important;
}

/* Menu Items */
body .user-menu .user-menu-content a {
    width: 100%;
    padding: 12px 20px;
    color: var(--text-color);
    text-decoration: none;
    border-bottom: 1px solid var(--border-color);
    display: block !important;
}

/* Icons */
body .user-menu .user-menu-content a i {
    display: inline-block;
    width: 20px;
    margin-right: 10px;
}

/* Text */
body .user-menu .user-menu-content a span {
    display: inline-block;
}

/* Hover Effects */
body .user-menu .user-menu-content a:hover {
    color: var(--text-hover);
    background: var(--hover-bg);
    padding-left: 25px;
}

/* Container Adjustment */
body .container {
    margin-top: 45px;
}

/* Remove any flex properties from these elements */
body .user-menu,
body .user-menu-content,
body .user-menu-item {
    display: block !important;
    flex: none !important;
    float: none !important;
}

/* Additional overrides */
body .user-menu-content {
    display: block !important;
    padding: 0 !important;
    gap: 0 !important;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 2000;
}

.modal-content {
    position: relative;
    background-color: var(--primary-color);
    margin: 15% auto;
    padding: 0;
    width: 90%;
    max-width: 500px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

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

.modal-header h2 {
    color: var(--text-hover);
    margin: 0;
}

.close-modal {
    color: var(--text-color);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.3s ease;
}

.close-modal:hover {
    color: var(--text-hover);
}

.modal-body {
    padding: 1.5rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    background-color: var(--secondary-color);
    color: var(--text-hover);
    border-radius: 4px;
}

.submit-btn {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--accent-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: opacity 0.3s ease;
}

.submit-btn:hover {
    opacity: 0.9;
}

/* Add these animation styles */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

@keyframes slideUp {
    0% { transform: translateY(20px); opacity: 0; }
    100% { transform: translateY(0); opacity: 1; }
}

/* Notification styles */
.notification {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 1rem 2rem;
    border-radius: 4px;
    color: white;
    font-weight: 500;
    animation: slideUp 0.3s ease forwards;
    z-index: 2100;
}

.notification.success {
    background-color: #2ecc71;
}

.notification.error {
    background-color: #e74c3c;
}

/* Form animation classes */
.shake {
    animation: shake 0.5s ease-in-out;
}

.form-group.error input {
    border-color: #e74c3c;
}

.form-group.success input {
    border-color: #2ecc71;
}

/* Loading animation for submit button */
@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

.submit-btn.loading {
    animation: pulse 1.5s infinite;
    cursor: not-allowed;
}

/* Users Online Panel */
.users-online-container {
    width: var(--users-width);
    background-color: var(--primary-color);
    position: fixed;
    right: 0;
    top: 0;
    height: 100vh;
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.users-online-header {
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
    margin-top: 45px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.total-online {
    background-color: var(--accent-color);
    color: white;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.8rem;
}

.users-list {
    padding: 15px;
    flex: 1;
    overflow-y: auto;
}

.registered-users ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.registered-users li {
    padding: 8px 10px;
    display: flex;
    align-items: center;
    color: var(--text-color);
    border-radius: 4px;
}

.registered-users li:hover {
    background-color: var(--hover-bg);
    color: var(--text-hover);
}

.registered-users li::before {
    content: '•';
    color: #2ecc71; /* Online indicator color */
    margin-right: 8px;
    font-size: 1.2em;
}

/* Vertical Menu Specific Styles */
.vertical-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--nav-width);
    background-color: var(--primary-color);
    z-index: 1000;
}

.vertical-menu .user-menu-header {
    padding: 12px 20px;
    color: var(--text-hover);
    font-weight: bold;
    border-bottom: 1px solid var(--border-color);
}

.vertical-content {
    display: block !important;
    width: 100%;
}

.vertical-content .user-menu-item {
    display: block;
    width: 100%;
    padding: 12px 20px;
    color: var(--text-color);
    text-decoration: none;
    border-bottom: 1px solid var(--border-color);
}

.vertical-content .user-menu-item:hover {
    color: var(--text-hover);
    background-color: var(--hover-bg);
    padding-left: 25px;
}

.vertical-content .user-menu-item i {
    width: 20px;
    margin-right: 10px;
    display: inline-block;
}

.vertical-content .user-menu-item span {
    display: inline-block;
}