.landing-container{position:relative;width:100%;height:100vh;background:#0a0a0a;overflow:hidden;display:flex;justify-content:center;align-items:center}.overlay{z-index:2;text-align:center;color:#fff}.game-title{font-size:4rem;font-weight:700;color:#00ffe1;text-shadow:0 0 10px #00ffe1}.welcome-text{font-size:1.5rem;margin:1rem 0;color:#fffc}.neon-button{background-color:transparent!important;border:2px solid #00ffe1!important;padding:.75rem 2rem;color:#00ffe1;font-size:1rem;border-radius:30px;cursor:pointer;transition:all .3s ease;text-shadow:0 0 5px #00ffe1}.neon-button:hover{background-color:#00ffe1!important;color:#000;box-shadow:0 0 20px 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1rem}.tab-btn,.play-btn{width:100%;font-size:1rem;padding:12px}.play-btn{font-size:1.1rem;padding:12px 24px}.content-overlay{padding:1.5rem}.tab-btn{font-size:.95rem}}@media screen and (max-width: 480px){.quiz-title{font-size:1.6rem}.tab-panel h3{font-size:1.3rem}.tab-panel p{font-size:.95rem}.bottom-nav{gap:.8rem;padding:1rem}.tab-btn,.play-btn{font-size:.95rem;padding:10px}}.quiz-list{list-style:none;padding:0;margin:1.5rem 0 0;display:flex;flex-direction:column;gap:1rem}.quiz-item{background:#ffffff1a;padding:1rem 1.5rem;border-radius:12px;cursor:pointer;transition:all .3s ease;display:flex;justify-content:space-between;align-items:center}.quiz-item:hover{background:#fff3}.leaderboard-table{width:100%;border-collapse:collapse;background:#ffffff0d;color:#fff;border-radius:8px;overflow:hidden;margin-top:20px}.leaderboard-table th,.leaderboard-table td{padding:12px 18px;text-align:left;border-bottom:1px solid rgba(255,255,255,.1)}.leaderboard-table th{background-color:#1f1f3f;color:#00ffe7}.topbar_play{position:absolute;top:10px;right:20px;z-index:2}.logout-btn{background:#ff4d4f;color:#fff;border:none;padding:6px 14px;border-radius:6px;cursor:pointer;font-weight:700;transition:.2s ease}.logout-btn:hover{background:#e04344}.login-page{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;z-index:1;font-family:Segoe UI,sans-serif}.login-container{position:relative;background:#0009;padding:40px;border-radius:16px;z-index:2;max-width:400px;width:100%;text-align:center}.login-title{color:#00ffe0;margin-bottom:20px;font-size:28px;text-shadow:0 0 10px #00ffe0}.login-form{display:flex;flex-direction:column}.login-input{background:transparent;border:2px solid #00ffe0;color:#fff;padding:12px 16px;margin-bottom:20px;border-radius:8px;outline:none;transition:border-color .3s,box-shadow .3s}.login-input::placeholder{color:#ffffff80}.login-input:focus{border-color:#00b3b3;box-shadow:0 0 10px #00ffe0}.login-button{background:#00ffe0!important;color:#000;font-weight:700;border:none;padding:14px;border-radius:8px;cursor:pointer;transition:all .3s}.login-button:hover{background:#00b3b3;color:#fff}.question-card{background-color:#1e1e2f;padding:2rem;border-radius:12px;margin:1rem auto;width:100%;max-width:600px;box-shadow:0 0 15px #38bdf866;animation:fadeIn .3s ease-in}.question-text{font-size:1.5rem;margin-bottom:1.5rem;color:#fff}.options-list{list-style:none;padding:0;margin:0}.option{background-color:#292940;padding:12px 18px;margin:10px 0;border-radius:8px;cursor:pointer;color:#eee;transition:.3s ease;border:2px solid transparent}.option:hover{background-color:#353554}.option.selected{background-color:#38bdf8;color:#0d0d0d;border-color:#0ff;font-weight:700}@keyframes 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#0000001a}.btn-home{background:#07f;color:#fff;font-weight:700;font-size:1.1rem;border:none;border-radius:30px;padding:12px 35px;cursor:pointer;margin-top:15px;box-shadow:0 6px 12px #0077ff80;transition:background-color .3s ease}.btn-home:hover{background:#005fcc;box-shadow:0 8px 20px #005fcccc}.score-container{position:relative;height:100vh;background:linear-gradient(135deg,#0f0c29,#302b63,#24243e);display:flex;justify-content:center;align-items:flex-start;overflow:hidden;color:#fff;font-family:Segoe UI,sans-serif;padding:40px 20px;box-sizing:border-box}.score-box{background:#ffffff0d;border:1px solid rgba(255,255,255,.2);padding:40px 61px;border-radius:20px;text-align:center;-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);box-shadow:0 0 30px #0ff3;animation:fadeIn 1.2s ease}.score-title{font-size:2.8rem;margin-bottom:20px;color:#00ffe7;text-shadow:0 0 10px #00ffe7}.score-text{font-size:1.6rem;margin-bottom:10px}.comment{font-size:1rem;margin-bottom:30px;color:#ccc}.highlight{color:#00ffe7;font-weight:700;text-shadow:0 0 8px #00ffe7}.score-btn{padding:12px 28px;font-size:1.1rem;background-color:#00ffe7;color:#000;border:none;border-radius:30px;cursor:pointer;transition:all .3s ease}.score-btn:hover{background-color:#0cb;transform:scale(1.05)}.glow-circle,.glow-square{position:absolute;background:#00ffe7;opacity:.1;filter:blur(80px);z-index:0;animation:float 6s ease-in-out infinite alternate}.glow-circle{width:300px;height:300px;border-radius:50%;top:-100px;right:-100px}.glow-square{width:200px;height:200px;bottom:-80px;left:-80px;transform:rotate(45deg)}@keyframes float{0%{transform:translateY(0) scale(1)}to{transform:translateY(20px) scale(1.1)}}@keyframes 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0;border-radius:6px}.correct-answer{background-color:#d4edda;font-weight:700;color:#000}.wrong-answer{background-color:#f8d7da;color:#000}.answer-summary::-webkit-scrollbar{width:4px!important}.answer-summary::-webkit-scrollbar-track{background:transparent}.answer-summary::-webkit-scrollbar-thumb{border-radius:10px;background:#0000004d}.sidebar{background-color:#1e1e2f;color:#fff;height:100vh;transition:width .3s ease;overflow:hidden;position:fixed;top:0;left:0}.sidebar.open{width:220px}.sidebar.collapsed{width:60px}.sidebar-logo{padding:20px;font-weight:700;font-size:20px}.sidebar-menu{list-style:none;padding:0;margin:0}.sidebar-menu li{padding:15px 20px;display:flex;align-items:center;gap:12px;cursor:pointer}.topbar{display:flex;justify-content:space-between;padding:16px;background-color:#1a1a2f;color:#fff;align-items:center;box-shadow:0 2px 6px #0000004d}.left .icon{margin-right:10px;cursor:pointer}.left 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#ccc;border-radius:6px;font-size:1rem;background-color:#f8f9fa;transition:border .3s}.form-group select:focus{border-color:#007bff;outline:none;background-color:#fff}.back-btn{margin-bottom:1rem;padding:8px 16px;background-color:#6c757d;color:#fff;border:none;border-radius:6px;cursor:pointer;transition:background-color .2s ease}.back-btn:hover{background-color:#5a6268}.quiz-history-container{padding:30px;background-color:#1c1c2c;min-height:100vh;color:#fff;font-family:Segoe UI,sans-serif}.quiz-history-container h2{font-size:24px;margin-bottom:20px;color:#fff}.quiz-buttons-container{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:30px}.quiz-button{padding:10px 16px;background-color:#2a2a3f;border:1px solid #4caf50;color:#4caf50;border-radius:6px;font-weight:500;cursor:pointer;transition:all .2s ease-in-out}.quiz-button:hover,.quiz-button.active{background-color:#4caf50;color:#fff}.quiz-question-card{background-color:#232334;border-radius:8px;padding:18px;margin-bottom:16px;border-left:5px solid #4caf50}.quiz-question-card h4{margin:0 0 10px;font-size:16px;color:#fff}.answer-info{margin-top:10px;font-size:14px}.correct-answer{color:#4caf50}.student-answer{color:#17a2b8}.answer-label{font-weight:700;margin-right:6px;color:#ccc}.answer-block{display:flex;flex-direction:column;gap:6px;margin-top:8px}.quiz-history-container{padding:40px;color:#fff;font-family:Segoe UI,sans-serif;background:linear-gradient(135deg,#0f0c29,#302b63,#24243e);min-height:100vh}.quiz-list{display:flex;flex-wrap:wrap;gap:16px;margin-bottom:30px}.quiz-btn{padding:12px 24px;border:1px solid rgba(255,255,255,.2);background:#ffffff0d;color:#00ffe7;border-radius:12px;cursor:pointer;transition:all .3s ease;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);text-transform:uppercase;font-weight:700}.quiz-btn:hover{background:#00ffe726;border-color:#00ffe7;transform:scale(1.05)}.quiz-btn.active{background:#00ffe740;border-color:#00ffe7;color:#fff;box-shadow:0 0 10px #00ffe7}.quiz-detail-container{background:linear-gradient(135deg,#0f0c29,#302b63,#24243e);color:#fff;font-family:Segoe UI,sans-serif;padding:40px 60px;min-height:100vh;position:relative;overflow-x:hidden;z-index:1}.quiz-detail-container h2{font-size:2.4rem;color:#00ffe7;text-shadow:0 0 10px #00ffe7;margin-bottom:30px}.question-list{display:flex;flex-direction:column;gap:30px}.question-item{background:#ffffff0d;border:1px solid rgba(255,255,255,.2);padding:25px 30px;border-radius:15px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:0 0 20px #00ffff1a;transition:all .3s ease}.question-text{font-size:1.3rem;font-weight:600;margin-bottom:16px;color:#fff}.answer-options{display:flex;flex-direction:column;gap:10px}.answer-option{padding:10px 15px;border-radius:10px;background:#ffffff0a;color:#ccc;border-left:4px solid transparent;transition:.3s}.answer-option.correct{background-color:#00ff9926;border-left:4px solid #00ff99;color:#0fc}.answer-option.incorrect{background-color:#ff000026;border-left:4px solid #ff4e4e;color:#f99}.answer-option.selected{font-weight:700;color:#fff;box-shadow:inset 0 0 10px #0ff3}.answer-label{font-weight:700;margin-right:10px;color:#00ffe7}.quiz-detail-container p{color:#bbb;font-size:1rem;margin-top:30px}@media screen and (max-width: 768px){.quiz-detail-container,.question-item{padding:20px}.question-text{font-size:1.1rem}}.signup-page{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;z-index:1;font-family:Segoe UI,sans-serif;background:#121217}.signup-container{position:relative;background:#000000a6;padding:40px;border-radius:16px;z-index:2;max-width:420px;width:100%;text-align:center}.signup-title{color:#00ffe0;margin-bottom:24px;font-size:30px;text-shadow:0 0 12px #00ffe0;font-weight:700}.signup-form{display:flex;flex-direction:column;gap:18px}.signup-input,.signup-select{background:transparent;border:2px solid #00ffe0;color:#fff;padding:12px 16px;border-radius:8px;outline:none;font-size:1rem;transition:border-color .3s,box-shadow .3s;appearance:none;-webkit-appearance:none;-moz-appearance:none}.signup-input::placeholder{color:#ffffff80}.signup-input:focus,.signup-select:focus{border-color:#00b3b3;box-shadow:0 0 10px #00ffe0}.signup-select{background-image:url("data:image/svg+xml,%3Csvg fill='%23ffffff' height='24' viewBox='0 0 24 24' width='24' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;background-size:16px 16px;cursor:pointer}.signup-button{background:#00ffe0!important;color:#000;font-weight:700;border:none;padding:14px;border-radius:8px;cursor:pointer;font-size:1.1rem;transition:all .3s;-webkit-user-select:none;user-select:none}.signup-button:hover{background:#00b3b3;color:#fff}.loading-screen{position:fixed;top:0;left:0;width:100%;height:100%;background:#1c1c2c;display:flex;align-items:center;justify-content:center;z-index:9999}.loading-glass{background:#ffffff0d;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:12px;padding:40px 60px;text-align:center;color:#fff;border:1px solid rgba(255,255,255,.1);box-shadow:0 0 15px #0ff3}.spinner{width:60px;height:60px;border:6px solid rgba(255,255,255,.2);border-top:6px solid #00e5ff;border-radius:50%;animation:spin 1s linear infinite;margin:0 auto 20px}@keyframes spin{to{transform:rotate(360deg)}}