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#e5e7eb;border-radius:16px;padding:24px;cursor:pointer;transition:all .3s ease}.turma-card:hover{border-color:#8b5cf6;transform:translateY(-4px);box-shadow:0 8px 30px #8b5cf626}.turma-header{margin-bottom:20px}.turma-header h4{font-size:1.3rem;font-weight:600;color:#1e293b;margin:0 0 8px}.turma-professor{font-size:.9rem;color:#6b7280;background:#f3f4f6;padding:4px 12px;border-radius:12px;display:inline-block}.turma-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:20px}.stat{display:flex;align-items:center;gap:8px}.stat-icon{font-size:1.5rem;width:40px;height:40px;display:flex;align-items:center;justify-content:center;background:#f8fafc;border-radius:8px}.stat-info{display:flex;flex-direction:column}.stat-value{font-size:1.2rem;font-weight:700;color:#1e293b}.stat-label{font-size:.75rem;color:#6b7280}.card-arrow{text-align:center;font-size:1.5rem;color:#6b7280;transition:transform .3s ease}.turma-card:hover 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32px;background:#f8fafc;text-align:center}.back-button{background:transparent;border:2px solid #3b82f6;color:#1e40af;padding:12px 24px;border-radius:12px;cursor:pointer;font-size:.95rem;font-weight:600;transition:all .3s ease;display:inline-flex;align-items:center;gap:8px}.back-button:hover{background:#eff6ff;border-color:#93c5fd;color:#1e40af;transform:translate(-2px)}.back-icon{font-size:1.1rem}@media(max-width:640px){.signup-container{padding:16px}.signup-card{max-width:100%;border-radius:20px}.signup-header{padding:40px 24px 32px}.main-title{font-size:1.8rem}.signup-form{padding:32px 24px}.signup-footer{padding:20px 24px 24px}.logo-circle{width:70px;height:70px}.logo-text{font-size:1.5rem}}.header{position:fixed;top:0;left:0;right:0;height:var(--header-height);background:var(--color-black);color:var(--color-white);display:flex;align-items:center;padding:0 20px;z-index:1000;box-shadow:0 2px 10px #0003;justify-content:space-between}.header-title h1{font-size:1.5rem;font-weight:600;margin-left:20px}.header-user{display:flex;align-items:center;gap:15px}.user-info{font-size:.9rem;color:var(--color-light-gray)}.logout-button{background:#ffffff1a;border:1px solid rgba(255,255,255,.2);color:var(--color-white);padding:8px 16px;border-radius:6px;cursor:pointer;font-size:.9rem;transition:all .3s ease}.logout-button:hover{background:#fff3;border-color:#ffffff4d}.hamburger-menu{background:transparent;border:none;cursor:pointer;display:flex;flex-direction:column;justify-content:space-around;width:30px;height:30px;padding:0;z-index:1001;transition:transform var(--transition-speed)}.hamburger-menu:hover{transform:scale(1.1)}.hamburger-menu span{width:100%;height:3px;background:var(--color-white);border-radius:3px;transition:all var(--transition-speed);transform-origin:center}.hamburger-menu.active span:nth-child(1){transform:rotate(45deg) translate(8px,8px)}.hamburger-menu.active span:nth-child(2){opacity:0}.hamburger-menu.active span:nth-child(3){transform:rotate(-45deg) translate(7px,-7px)}.sidebar{position:fixed;top:var(--header-height);left:0;width:var(--sidebar-width);height:calc(100vh - var(--header-height));background:linear-gradient(180deg,#1a1a2e,#16213e,#0f3460);transition:transform var(--transition-speed) ease-in-out;z-index:999;overflow-y:auto;box-shadow:4px 0 20px #0000004d;border-right:1px solid rgba(255,255,255,.1)}.sidebar.collapsed{transform:translate(-100%)}.sidebar::-webkit-scrollbar{width:8px}.sidebar::-webkit-scrollbar-track{background:#0f3460}.sidebar::-webkit-scrollbar-thumb{background:#fff3;border-radius:4px}.sidebar::-webkit-scrollbar-thumb:hover{background:#ffffff4d}.menu{padding:20px 0}.menu-list{list-style:none}.menu-item{margin-bottom:5px;opacity:0;animation:fadeInSlide .5s ease-out forwards}@keyframes fadeInSlide{0%{opacity:0;transform:translate(-20px)}to{opacity:1;transform:translate(0)}}.menu-link{display:flex;align-items:center;padding:15px 25px;color:#1a1a1a;text-decoration:none;transition:all var(--transition-speed);position:relative;overflow:hidden;cursor:pointer;opacity:0;animation:fadeInLink .6s ease-out forwards;border-radius:0 20px 20px 0;margin:2px 10px 2px 0}@keyframes fadeInLink{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.menu-link:before{display:none}.menu-link:after{display:none}.menu-link:hover:not(.disabled){background:#667eea1a;color:#1a1a1a;transform:translate(5px)}.menu-link:hover:not(.disabled):before{display:none}.menu-link:hover:not(.disabled):after{display:none}.menu-link.active{color:#1a1a1a;font-style:italic;font-weight:700;transform:translate(5px)}.menu-link.active:before{display:none}.menu-link.disabled{opacity:.4;cursor:not-allowed;color:#a0aec0}.menu-link.disabled:hover{background:transparent;color:#a0aec0;transform:none}.lock-icon{margin-left:auto;font-size:.8rem;opacity:.7}.menu-icon{font-size:1.3rem;margin-right:15px;width:25px;text-align:center}.menu-text{font-size:1rem;font-weight:500}.main-content{margin-left:var(--sidebar-width);margin-top:var(--header-height);min-height:calc(100vh - var(--header-height));padding:40px;transition:margin-left var(--transition-speed)}.main-content.expanded{margin-left:0}.home-section{max-width:1200px;margin:0 auto;animation:fadeIn .5s ease-in}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.home-container{background:var(--color-white);border-radius:15px;padding:60px;box-shadow:0 10px 30px #0000001a}.logo-section{text-align:center;margin-bottom:50px;padding-bottom:30px;border-bottom:2px solid var(--color-light-gray);cursor:pointer}.sia-title{font-size:4rem;font-weight:700;color:var(--color-black);letter-spacing:5px;margin-bottom:10px}.hero-title{font-size:2.5rem;color:var(--color-black);margin-bottom:20px;font-weight:700;line-height:1.2}.hero-subtitle{font-size:1.2rem;color:var(--color-medium-gray);line-height:1.6;max-width:800px;margin:0 auto 50px}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:30px;margin-top:50px}.feature-card{background:#fff;padding:30px;border-radius:12px;box-shadow:0 5px 20px #0000001a;text-align:center;transition:all .3s ease;border:1px solid #e5e7eb}.feature-card:hover{transform:translateY(-5px);box-shadow:0 10px 30px #00000026}.feature-icon{font-size:2.5rem;display:block;margin-bottom:15px}.feature-card h4{font-size:1.3rem;color:var(--color-black);margin-bottom:10px;font-weight:600}.feature-card p{font-size:.95rem;color:var(--color-medium-gray);line-height:1.5}.cta-section{margin-top:60px;padding:50px;background:linear-gradient(135deg,var(--color-dark-gray) 0%,var(--color-black) 100%);border-radius:16px;color:#fff;text-align:center}.cta-content h4{font-size:1.8rem;margin-bottom:15px;font-weight:600}.cta-content p{font-size:1.1rem;margin-bottom:30px;opacity:.9;line-height:1.6}.cta-buttons{display:flex;gap:20px;justify-content:center;flex-wrap:wrap}.cta-primary{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:15px 30px;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease;text-transform:uppercase;letter-spacing:.5px}.cta-primary:hover{transform:translateY(-2px);box-shadow:0 10px 25px #667eea4d}.cta-secondary{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.3);padding:13px 28px;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease}.cta-secondary:hover{background:#ffffff1a;border-color:#ffffff80}.page-section{max-width:1200px;margin:0 auto;animation:fadeIn .5s ease-in}.page-content{background:var(--color-white);border-radius:15px;padding:40px;box-shadow:0 10px 30px #0000001a}.page-content h2{font-size:2rem;color:var(--color-black);margin-bottom:20px}.page-content p{font-size:1.1rem;color:var(--color-dark-gray);line-height:1.8}@media(max-width:768px){.main-content{margin-left:0;padding:20px}.sidebar{transform:translate(-100%)}.sidebar.show{transform:translate(0)}.home-container{padding:30px 20px}.sia-title{font-size:2.5rem}.main-slogan{font-size:1.5rem}.slogan-variations,.values-grid{grid-template-columns:1fr}}