:root{--zama-yellow: #FFD700;--zama-black: #000000;--zama-dark-gray: #1A1A1A;--zama-light-yellow: #FFFACD;--zama-accent: #FFC107;--success-green: #22C55E;--error-red: #EF4444;--text-on-dark: #FFFFFF;--text-on-light: #000000}*{box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;margin:0;background:var(--zama-black);color:var(--text-on-dark);line-height:1.6;-webkit-font-smoothing:antialiased}.app{max-width:1200px;margin:0 auto;padding:20px}.hero{background:var(--zama-yellow);color:var(--zama-black);text-align:center;padding:50px 40px;border-radius:12px;margin-bottom:30px;border:3px solid var(--zama-black)}.hero h1{font-size:3.2rem;font-weight:900;margin:0 0 12px;text-transform:uppercase;letter-spacing:2px}.hero p{font-size:1.2rem;margin:0 0 16px;font-weight:600}.progress{background:var(--zama-black);color:var(--zama-yellow);padding:8px 16px;border-radius:20px;font-weight:600;font-size:.9rem;display:inline-block}.lesson-nav{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px;margin-bottom:30px}.lesson-button{background:var(--zama-dark-gray);border:3px solid var(--zama-yellow);border-radius:12px;padding:20px;cursor:pointer;transition:all .2s ease;text-align:left;color:var(--text-on-dark)}.lesson-button:hover,.lesson-button.active{background:var(--zama-yellow);color:var(--zama-black)}.lesson-title{font-size:1.3rem;font-weight:800;margin-bottom:4px;letter-spacing:.5px}.lesson-subtitle{font-size:1rem;font-weight:500;opacity:.8}.learning-area{background:#fff;border:3px solid var(--zama-yellow);border-radius:12px;padding:40px;margin-bottom:30px}.step-header{text-align:center;margin-bottom:30px;padding-bottom:20px;border-bottom:2px solid var(--zama-yellow)}.step-header h2{font-size:2.2rem;font-weight:800;margin:0 0 8px;color:var(--zama-black)}.step-type{background:var(--zama-yellow);color:var(--zama-black);padding:6px 12px;border-radius:15px;font-size:.8rem;font-weight:700;text-transform:uppercase;letter-spacing:1px;display:inline-block}.step-content{display:grid;grid-template-columns:1fr 1fr;gap:40px}.content-section h3{font-size:1.4rem;font-weight:700;margin:0 0 16px;color:var(--zama-black)}.step-explanation{font-size:1.1rem;font-weight:400;color:var(--zama-dark-gray);line-height:1.7;margin-bottom:24px}.code-block{background:var(--zama-black);color:var(--zama-yellow);padding:20px;border:2px solid var(--zama-yellow);border-radius:8px;overflow-x:auto;font-family:JetBrains Mono,monospace;font-size:.85rem;font-weight:500;line-height:1.5;margin:0;max-width:100%;word-break:break-word;white-space:pre-wrap}.code-block .comment{color:#90cdf4;font-style:italic}.code-block .keyword{color:#f687b3;font-weight:600}.code-block .function{color:#68d391}.mini-diagram{display:inline-flex;gap:8px;align-items:center;background:#111;border:1px solid #333;border-radius:8px;padding:6px 10px;margin:8px 0 0;font-size:.9rem}.mini-diagram .diagram-arrow{opacity:.7}.interaction-section h3{font-size:1.4rem;font-weight:700;margin:0 0 20px;color:var(--zama-black)}.question{margin-bottom:24px}.question h4,.question-section h4{font-size:1.1rem;font-weight:600;margin:0 0 12px;color:var(--zama-black)}.option{display:flex;align-items:center;gap:12px;padding:12px 16px;margin:8px 0;background:var(--zama-light-yellow);border:2px solid transparent;border-radius:8px;cursor:pointer;transition:all .2s ease}.option:hover{border-color:var(--zama-yellow)}.option input[type=radio]{width:16px;height:16px;accent-color:var(--zama-yellow)}.option span{font-weight:500;color:var(--zama-black)}.actions{display:flex;gap:12px;margin:24px 0;flex-wrap:wrap}.check-button{background:var(--success-green);color:#fff;border:none;padding:12px 24px;border-radius:8px;font-weight:600;cursor:pointer;transition:all .2s ease}.check-button:hover{background:#16a34a}.next-button:hover{background:var(--zama-accent)}.deploy-button{background:var(--zama-black);color:var(--zama-yellow);border:2px solid var(--zama-yellow);padding:12px 24px;border-radius:8px;font-weight:600;cursor:pointer;transition:all .2s ease}.deploy-button:hover{background:var(--zama-dark-gray)}.results{margin-top:20px}.result{padding:12px 16px;border-radius:8px;margin:8px 0;font-weight:600}.result.correct{background:#dcfce7;color:#15803d;border:1px solid var(--success-green)}.result.wrong{background:#fee2e2;color:#dc2626;border:1px solid var(--error-red)}.footer{text-align:center;background:var(--zama-yellow);color:var(--zama-black);border:3px solid var(--zama-black);border-radius:12px;padding:24px;margin-top:30px}.footer p{margin:6px 0;font-weight:600}.demo-section{background:var(--zama-light-yellow);border:2px solid var(--zama-yellow);border-radius:12px;padding:24px;margin:20px 0}.demo-section h3{font-size:1.4rem;font-weight:700;margin:0 0 12px;color:var(--zama-black)}.demo-question{background:#fff;border:2px solid var(--zama-yellow);border-radius:8px;padding:16px;margin:0 0 20px;font-weight:600;color:var(--zama-black);font-style:italic;text-align:center}.demo-inputs{margin-bottom:20px}.input-group{display:flex;align-items:center;gap:12px;margin:12px 0}.input-group label{font-weight:600;color:var(--zama-black);min-width:100px}.input-group input[type=number]{padding:8px 12px;border:2px solid var(--zama-yellow);border-radius:6px;font-size:1rem;width:100px}.input-group select{padding:12px;border:2px solid var(--zama-yellow);border-radius:6px;font-size:1rem;background:#fff;color:var(--zama-black);cursor:pointer;min-width:200px}.input-group select:focus{outline:none;border-color:var(--zama-yellow);box-shadow:0 0 0 3px #ffde594d}.vote-choices{display:flex;gap:16px;margin:16px 0}.vote-choice{display:flex;align-items:center;gap:8px;padding:12px 16px;background:#fff;border:2px solid var(--zama-yellow);border-radius:8px;cursor:pointer;transition:all .2s ease}.vote-choice:hover{background:var(--zama-yellow)}.vote-choice input[type=radio]{accent-color:var(--zama-yellow)}.vote-choice span{font-weight:600;color:var(--zama-black)}.current-state,.vote-tallies{background:#fff;border:1px solid var(--zama-yellow);border-radius:6px;padding:12px;margin:12px 0;font-weight:500;color:var(--zama-black)}.vote-tallies{display:flex;gap:20px}.guess-result,.transfer-result,.optimization-result{background:#fff;border:2px solid var(--zama-yellow);border-radius:8px;padding:16px;margin:12px 0;color:var(--zama-black)}.guess-result strong,.transfer-result strong,.optimization-result strong{color:var(--zama-black);font-weight:700}.optimization-result div{margin:8px 0;padding:4px 0}.optimization-result div:first-child{font-size:1.1rem;font-weight:700;color:var(--zama-black)}.demo-buttons{display:flex;flex-direction:column;gap:8px;margin-top:12px}.demo-button{background:var(--zama-black);color:var(--zama-yellow);border:3px solid var(--zama-yellow);padding:14px 28px;border-radius:8px;font-weight:700;font-size:1.1rem;cursor:pointer;transition:all .2s ease;width:100%}.demo-button:hover{background:var(--zama-yellow);color:var(--zama-black)}.secondary-button{background:var(--zama-black);color:var(--zama-yellow);border:2px solid var(--zama-yellow);padding:10px 16px;border-radius:8px;font-weight:700;cursor:pointer;transition:all .2s ease;margin-top:8px}.secondary-button:hover{background:var(--zama-yellow);color:var(--zama-black)}.ciphertext-box{margin-top:16px;background:#0c0c0c;border:1px solid #333;border-radius:8px;padding:12px}.ciphertext-loading{color:#aaa}.ciphertext-error{color:#ff5c5c}.ciphertext-hint{color:#888;font-size:.9rem}.common-misconceptions{background:#1a1a1a;border-left:3px solid var(--zama-yellow);padding:12px;margin:12px 0;font-size:.9rem}.common-misconceptions h4{color:var(--zama-yellow);margin:0 0 8px;font-size:1rem}.demo-steps{background:#fff;border:1px solid var(--zama-yellow);border-radius:8px;padding:16px;margin-top:20px}.demo-steps h4{margin:0 0 12px;color:var(--zama-black);font-weight:700}.demo-step{background:#f8f9fa;padding:8px 12px;margin:6px 0;border-radius:4px;font-family:JetBrains Mono,monospace;font-size:.9rem;color:var(--zama-black)}.completion-screen{text-align:center}.completion-header h2{font-size:2.5rem;font-weight:800;color:var(--zama-black);margin:0 0 16px}.completion-header p{font-size:1.2rem;color:var(--zama-dark-gray);margin:0 0 40px}.score-section{background:var(--zama-light-yellow);border:3px solid var(--zama-yellow);border-radius:12px;padding:30px;margin:30px 0}.score-section h3{font-size:1.5rem;font-weight:700;color:var(--zama-black);margin:0 0 20px}.score-display{margin:20px 0}.score-number{font-size:4rem;font-weight:900;color:var(--zama-black);margin-bottom:8px}.score-text{font-size:1.2rem;color:var(--zama-dark-gray);margin-bottom:16px}.score-grade{font-size:1.3rem;font-weight:700;padding:12px 24px;border-radius:25px;display:inline-block}.score-grade.excellent{background:#22c55e;color:#fff}.score-grade.good{background:var(--zama-yellow);color:var(--zama-black)}.score-grade.needs-practice{background:#ef4444;color:#fff}.contracts-section{background:#fff;border:2px solid var(--zama-yellow);border-radius:12px;padding:30px;margin:30px 0}.contracts-section h3{font-size:1.5rem;font-weight:700;color:var(--zama-black);margin:0 0 16px}.contracts-section p{color:var(--zama-dark-gray);margin-bottom:20px}.contract-links{display:grid;gap:16px}.contract-link{display:flex;justify-content:space-between;align-items:center;padding:16px;background:#f8f9fa;border:1px solid var(--zama-yellow);border-radius:8px}.contract-name{font-weight:600;color:var(--zama-black)}.etherscan-link{background:var(--zama-yellow);color:var(--zama-black);padding:8px 16px;border-radius:6px;text-decoration:none;font-weight:600;transition:all .2s ease}.etherscan-link:hover{background:var(--zama-black);color:var(--zama-yellow)}.next-steps-final{background:#f0fdf4;border:2px solid #22C55E;border-radius:12px;padding:24px;margin:30px 0;text-align:left}.next-steps-final h3{color:#15803d;font-weight:700;margin:0 0 16px}.next-steps-final ul{color:#15803d;font-weight:500}.links-section{margin:30px 0}.links-container{display:grid;grid-template-columns:1fr 1fr;gap:24px}.zama-links,.author-links{background:#fff;border:2px solid var(--zama-yellow);border-radius:12px;padding:24px}.zama-links h4,.author-links h4{font-size:1.2rem;font-weight:700;margin:0 0 16px;color:var(--zama-black)}.link-list{display:flex;flex-direction:column;gap:12px}.link-list a{background:var(--zama-light-yellow);color:var(--zama-black);padding:12px 16px;border:1px solid var(--zama-yellow);border-radius:8px;text-decoration:none;font-weight:600;transition:all .2s ease}.link-list a:hover{background:var(--zama-yellow);transform:translateY(-1px);box-shadow:0 2px 8px #ffd7004d}.lesson-completion{text-align:center}.lesson-complete-header h2{font-size:2.2rem;font-weight:800;color:var(--zama-black);margin:0 0 12px}.lesson-complete-header p{font-size:1.1rem;color:var(--zama-dark-gray);margin:0 0 30px}.lesson-score{background:var(--zama-light-yellow);border:2px solid var(--zama-yellow);border-radius:12px;padding:24px;margin:24px 0}.lesson-contract{background:#fff;border:2px solid var(--zama-yellow);border-radius:12px;padding:24px;margin:24px 0}.lesson-contract h3{font-size:1.4rem;font-weight:700;color:var(--zama-black);margin:0 0 16px}.lesson-review{background:#fff;border:2px solid var(--zama-yellow);border-radius:12px;padding:24px;margin:24px 0;text-align:left}.lesson-review h3{font-size:1.4rem;font-weight:700;color:var(--zama-black);margin:0 0 20px}.answer-review{background:#f8f9fa;border-radius:8px;padding:16px;margin:12px 0}.question-text{font-weight:600;color:var(--zama-black);margin-bottom:8px;font-size:1rem}.answer-result.correct{color:#15803d}.answer-result.wrong{color:#dc2626}.user-answer{font-weight:600;margin-bottom:4px}.correct-answer{font-weight:500;font-style:italic;opacity:.8}.try-again-button{background:#ef4444;color:#fff;border:2px solid #DC2626;padding:12px 24px;border-radius:8px;font-weight:600;cursor:pointer;transition:all .2s ease}.try-again-button:hover{background:#dc2626}.lesson-actions{display:flex;gap:16px;justify-content:center;margin:30px 0}.back-button{background:var(--zama-dark-gray);color:var(--text-on-dark);border:2px solid var(--zama-yellow);padding:12px 24px;border-radius:8px;font-weight:600;cursor:pointer;transition:all .2s ease}.back-button:hover{background:var(--zama-yellow);color:var(--zama-black)}.next-lesson-button,.final-results-button{background:var(--zama-yellow);color:var(--zama-black);border:2px solid var(--zama-black);padding:12px 24px;border-radius:8px;font-weight:600;cursor:pointer;transition:all .2s ease}.next-lesson-button:hover,.final-results-button:hover{background:var(--zama-black);color:var(--zama-yellow)}.actions{display:flex;gap:16px;justify-content:center;margin:24px 0}.next-button{background:var(--zama-yellow);color:var(--zama-black);border:2px solid var(--zama-black);padding:12px 24px;border-radius:8px;font-weight:600;cursor:pointer;transition:all .2s ease}.next-button:hover{background:var(--zama-black);color:var(--zama-yellow)}@media (max-width: 768px){.app{padding:16px}.hero{padding:40px 20px}.hero h1{font-size:2.5rem}.lesson-nav{grid-template-columns:1fr}.learning-area{padding:24px}.step-content{grid-template-columns:1fr;gap:24px}.actions{flex-direction:column}.actions button{width:100%}.vote-choices{flex-direction:column}.vote-tallies{flex-direction:column;gap:8px}.input-group{flex-direction:column;align-items:flex-start}.lesson-actions,.actions{flex-direction:column}.lesson-actions button,.actions button{width:100%}.links-container{grid-template-columns:1fr;gap:16px}}@media (max-width: 480px){.hero h1{font-size:2rem}.learning-area{padding:20px}.lesson-button{padding:16px}}.notes-section{background:#fff;border:2px solid var(--zama-yellow);border-radius:8px;padding:16px;margin:16px 0;color:var(--zama-black);font-size:.95rem;line-height:1.6}.notes-section h4{color:var(--zama-black);font-weight:700;margin:0 0 12px;font-size:1rem}.notes-section ul{margin:8px 0;padding-left:20px}.notes-section li{margin:4px 0;color:var(--zama-black)}.notes-section .common-misconceptions{background:#fff3cd;border:1px solid #ffeaa7;border-radius:6px;padding:12px;margin:12px 0}.notes-section .common-misconceptions h4{color:#856404;margin:0 0 8px;font-size:.9rem}.notes-section code{background:var(--zama-black);color:var(--zama-yellow);padding:2px 4px;border-radius:3px;font-family:monospace;font-size:.85rem}