@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@100;200;300;400;500;600;700;800;900&display=swap');
a,abbr,acronym,address,applet,article,aside,audio,b,big,blockquote,body,canvas,caption,center,cite,code,dd,del,details,dfn,div,dl,dt,em,embed,fieldset,figcaption,figure,footer,form,h1,h2,h3,h4,h5,h6,header,hgroup,html,i,iframe,img,ins,kbd,label,legend,li,mark,menu,nav,object,ol,output,pre,q,ruby,s,samp,section,small,span,strike,strong,sub,summary,sup,table,tbody,td,tfoot,th,thead,time,tr,tt,u,ul,var,video {
    margin:0;
    padding:0;
    border:0;
    list-style:none;
    outline:0
}
@keyframes blink_{0%{opacity:1}50%{opacity:.9;color:var(--color-003)}100%{opacity:1;color:#d02aff;}}@keyframes spin{0%{transform:translate(-50%,-50%) rotate(0)}100%{transform:translate(-50%,-50%) rotate(360deg)}}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}



/* FLEX/GRID */
.flex {
    display:flex;
}
.grid  {
    display: grid;
}

.b_flex  {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
}
.flex_column,
.flex_column_b {
    display:flex;
    flex-direction:column;
}
.flex_column {
    align-items:center
}
.flex_column_b {
    align-items:center;
    justify-content:center
}
.flexColum {
    display:flex;
    flex-direction:column;
    gap:10px
}

.flex_columns {
    display:flex;
    flex-direction:row;
    gap:90px;
    font-size:15px;
    color:#fff;
    width:50%
}

.flex-center{
align-items: center;
}
.gap{
    gap:5px;
}
.gap-one{
    gap:10px;
}
.gap-two{
    gap:15px;
}
.gap-three{
    gap:20px;
}
.wrap{
    flex-wrap:wrap;
}
.grid_items {
    display:grid;
    grid-template-columns:repeat(auto-fill,minmax(21%,1fr));
    gap:15px;
    position:relative;
    padding:15px;
    box-sizing:border-box
}
.latest  {
    gap: 10px;
    grid-template-columns: repeat(auto-fill, minmax(14%, 1fr));
    margin-bottom:30px;
}
 :root {
            --primary-color: #4361ee;
            --secondary-color: #3a0ca3;
            --accent-color: #4cc9f0;
            --light-color: #f8f9fa;
            --dark-color: #212529;
            --success-color: #4caf50;
            --warning-color: #ff9800;
            --danger-color: #f72585;
            --gray-color: #6c757d;
            --border-radius: 8px;
            --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        
        body {
            background-color: #f5f7fb;
            color: var(--dark-color);
            line-height: 1.6;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        a {
            text-decoration: none;
            color: inherit;
        }
        
        ul {
            list-style: none;
        }
        
        .btn {
            display: inline-block;
            padding: 10px 20px;
            border-radius: var(--border-radius);
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            font-size: 16px;
        }
        
        .btn-primary {
            background-color: var(--primary-color);
            color: white;
        }
        
        .btn-primary:hover {
            background-color: var(--secondary-color);
            transform: translateY(-2px);
        }
        
        .btn-secondary {
            background-color: var(--light-color);
            color: var(--dark-color);
            border: 1px solid #ddd;
        }
        
        .btn-secondary:hover {
            background-color: #e9ecef;
        }
        
        .btn-success {
            background-color: var(--success-color);
            color: white;
        }
        
        .text-center {
            text-align: center;
        }
        
        .mt-1 { margin-top: 10px; }
        .mt-2 { margin-top: 20px; }
        .mt-3 { margin-top: 30px; }
        .mt-4 { margin-top: 40px; }
        
        .mb-1 { margin-bottom: 10px; }
        .mb-2 { margin-bottom: 20px; }
        .mb-3 { margin-bottom: 30px; }
        .mb-4 { margin-bottom: 40px; }
        
        .hidden {
            display: none !important;
        }
        
        /* Header */
        header {
            background-color: white;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 700;
            color: var(--primary-color);
        }
        
        .logo i {
            color: var(--accent-color);
        }
        
        .nav-menu {
            display: flex;
            gap: 25px;
        }
        
        .nav-menu a {
            font-weight: 600;
            color: var(--dark-color);
            padding: 8px 0;
            position: relative;
        }
        
        .nav-menu a:hover {
            color: var(--primary-color);
        }
        
        .nav-menu a.active {
            color: var(--primary-color);
        }
        
        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background-color: var(--primary-color);
            border-radius: 3px;
        }
        
        .user-menu {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        
        .user-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--primary-color);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
        }
        
        /* Footer */
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 40px 0 20px;
            margin-top: 60px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
        }
        
        .footer-column h3 {
            font-size: 18px;
            margin-bottom: 20px;
            color: var(--accent-color);
        }
        
        .footer-links li {
            margin-bottom: 10px;
        }
        
        .footer-links a:hover {
            color: var(--accent-color);
        }
        
        .social-links {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }
        
        .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background-color: rgba(255, 255, 255, 0.1);
            transition: var(--transition);
        }
        
        .social-links a:hover {
            background-color: var(--primary-color);
            transform: translateY(-3px);
        }
        
        .copyright {
            text-align: center;
            padding-top: 30px;
            margin-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 14px;
            color: #aaa;
        }
        
        /* Página Home */
        .hero {
            padding: 80px 0;
            background: linear-gradient(135deg, #4361ee 0%, #3a0ca3 100%);
            color: white;
            border-radius: 0 0 30px 30px;
        }
        
        .hero-content {
            max-width: 700px;
            margin: 0 auto;
        }
        
        .hero h1 {
            font-size: 42px;
            margin-bottom: 20px;
        }
        
        .hero p {
            font-size: 18px;
            margin-bottom: 30px;
            opacity: 0.9;
        }
        
        .hero-buttons {
            display: flex;
            gap: 15px;
            justify-content: center;
        }
        
        .hero-buttons .btn {
            padding: 12px 30px;
            font-size: 18px;
        }
        
        .hero-buttons .btn-primary {
            background-color: white;
            color: var(--primary-color);
        }
        
        .hero-buttons .btn-primary:hover {
            background-color: #f0f0f0;
        }
        
        .hero-buttons .btn-secondary {
            background-color: transparent;
            color: white;
            border: 2px solid rgba(255, 255, 255, 0.3);
        }
        
        .hero-buttons .btn-secondary:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }
        
        .features {
            padding: 80px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 50px;
            font-size: 32px;
            color: var(--dark-color);
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        
        .feature-card {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 30px;
            box-shadow: var(--box-shadow);
            transition: var(--transition);
            text-align: center;
        }
        
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }
        
        .feature-icon {
            width: 70px;
            height: 70px;
            background-color: rgba(67, 97, 238, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            color: var(--primary-color);
            font-size: 28px;
        }
        
        .feature-card h3 {
            margin-bottom: 15px;
            font-size: 22px;
        }
        
        /* Página de Login */
        .login-page {
            display: flex;
            min-height: calc(100vh - 200px);
        }
        
        .login-container {
            max-width: 450px;
            width: 100%;
            margin: auto;
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            padding: 40px;
        }
        
        .login-header {
            text-align: center;
            margin-bottom: 30px;
        }
        
        .login-header h2 {
            color: var(--primary-color);
            margin-bottom: 10px;
        }
        
        .login-form .form-group {
            margin-bottom: 20px;
        }
        
        .login-form label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
        }
        
        .login-form input {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-size: 16px;
            transition: var(--transition);
        }
        
        .login-form input:focus {
            border-color: var(--primary-color);
            outline: none;
            box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
        }
        
        .form-options {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 25px;
        }
        
        .remember-me {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .remember-me input {
            width: auto;
        }
        
        .forgot-password {
            color: var(--primary-color);
            font-weight: 500;
        }
        
        .forgot-password:hover {
            text-decoration: underline;
        }
        
        .login-form .btn {
            width: 100%;
            padding: 14px;
            font-size: 16px;
        }
        
        .login-divider {
            display: flex;
            align-items: center;
            margin: 25px 0;
        }
        
        .login-divider::before,
        .login-divider::after {
            content: '';
            flex: 1;
            height: 1px;
            background-color: #eee;
        }
        
        .login-divider span {
            padding: 0 15px;
            color: var(--gray-color);
            font-size: 14px;
        }
        
        .social-login {
            display: flex;
            gap: 15px;
        }
        
        .social-login .btn {
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
        }
        
        .login-footer {
            text-align: center;
            margin-top: 25px;
            color: var(--gray-color);
        }
        
        .login-footer a {
            color: var(--primary-color);
            font-weight: 600;
        }
        
        /* Página de Questões */
        .questions-page {
            padding: 40px 0;
        }
        
        .page-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 30px;
            flex-wrap: wrap;
            gap: 15px;
        }
        
        .page-header h1 {
            color: var(--dark-color);
            font-size: 28px;
        }
        
        .page-actions {
            display: flex;
            gap: 15px;
            align-items: center;
        }
        
        .search-box {
            position: relative;
            width: 300px;
        }
        
        .search-box input {
            width: 100%;
            padding: 12px 15px 12px 45px;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-size: 16px;
        }
        
        .search-box i {
            position: absolute;
            left: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--gray-color);
        }
        
        .filter-btn {
            display: flex;
            align-items: center;
            gap: 8px;
            background-color: white;
            border: 1px solid #ddd;
            padding: 10px 15px;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 500;
        }
        
        .questions-container {
            display: grid;
            grid-template-columns: 250px 1fr;
            gap: 30px;
        }
        
        /* Filtros */
        .filters-sidebar {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 25px;
            box-shadow: var(--box-shadow);
            height: fit-content;
        }
        
        .filters-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 1px solid #eee;
        }
        
        .filters-header h3 {
            font-size: 18px;
        }
        
        .clear-filters {
            color: var(--primary-color);
            font-size: 14px;
            cursor: pointer;
            font-weight: 500;
        }
        
        .clear-filters:hover {
            text-decoration: underline;
        }
        
        .filter-section {
            margin-bottom: 25px;
        }
        
        .filter-section h4 {
            margin-bottom: 12px;
            font-size: 16px;
            color: var(--dark-color);
        }
        
        .filter-options {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        
        .filter-option {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .filter-option input {
            width: auto;
        }
        
        .filter-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 10px;
        }
        
        .tag {
            background-color: #e9ecef;
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 14px;
            cursor: pointer;
            transition: var(--transition);
        }
        
        .tag:hover, .tag.active {
            background-color: var(--primary-color);
            color: white;
        }
        
        /* Lista de questões */
        .questions-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        
        .question-card {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 25px;
            box-shadow: var(--box-shadow);
            transition: var(--transition);
        }
        
        .question-card:hover {
            box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
        }
        
        .question-header {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            margin-bottom: 15px;
        }
        
        .question-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--dark-color);
            margin-right: 15px;
        }
        
        .question-title:hover {
            color: var(--primary-color);
        }
        
        .question-meta {
            display: flex;
            gap: 15px;
            margin-bottom: 15px;
            font-size: 14px;
            color: var(--gray-color);
        }
        
        .question-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 15px;
        }
        
        .question-tag {
            background-color: rgba(67, 97, 238, 0.1);
            color: var(--primary-color);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
        }
        
        .question-preview {
            margin-bottom: 20px;
            line-height: 1.6;
        }
        
        .question-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 15px;
            border-top: 1px solid #eee;
        }
        
        .question-stats {
            display: flex;
            gap: 20px;
        }
        
        .stat {
            display: flex;
            align-items: center;
            gap: 5px;
            color: var(--gray-color);
            font-size: 14px;
        }
        
        .difficulty {
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
        }
        
        .difficulty.easy {
            background-color: rgba(76, 175, 80, 0.1);
            color: var(--success-color);
        }
        
        .difficulty.medium {
            background-color: rgba(255, 152, 0, 0.1);
            color: var(--warning-color);
        }
        
        .difficulty.hard {
            background-color: rgba(247, 37, 133, 0.1);
            color: var(--danger-color);
        }
        
        .pagination {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin-top: 40px;
        }
        
        .pagination-btn {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--border-radius);
            background-color: white;
            border: 1px solid #ddd;
            cursor: pointer;
            transition: var(--transition);
            font-weight: 600;
        }
        
        .pagination-btn:hover {
            background-color: #f5f5f5;
        }
        
        .pagination-btn.active {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }
        
        /* Responsividade */
        @media (max-width: 992px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .questions-container {
                grid-template-columns: 1fr;
            }
            
            .filters-sidebar {
                order: 2;
            }
        }
        
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 32px;
            }
            
            .hero-buttons {
                flex-direction: column;
                align-items: center;
            }
            
            .features-grid {
                grid-template-columns: 1fr;
            }
            
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .page-header {
                flex-direction: column;
                align-items: flex-start;
            }
            
            .search-box {
                width: 100%;
            }
        }
        
        @media (max-width: 576px) {
            .login-container {
                padding: 30px 20px;
            }
            
            .social-login {
                flex-direction: column;
            }
            
            .footer-content {
                grid-template-columns: 1fr;
            }
            
            .question-header {
                flex-direction: column;
                gap: 10px;
            }
            
            .question-footer {
                flex-direction: column;
                align-items: flex-start;
                gap: 15px;
            }
        }