body{margin:0;font-family:Palatino Linotype,Book Antiqua,Palatino,Georgia,serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:#fdfbf7;min-height:100vh}h1,h2,h3,h4{color:#1a1a2e;margin:0}h1{font-size:2rem;font-weight:700}h2{font-size:1.5rem;font-weight:700}h3{font-size:1.25rem;font-weight:700}h4{font-size:1rem;font-weight:600}button{padding:12px 24px;border:none;border-radius:8px;font-weight:600;cursor:pointer;transition:all .2s;font-size:1rem}button:disabled{background:#d1d5db!important;cursor:not-allowed;opacity:.6}button:not(:disabled):hover{transform:translateY(-2px);box-shadow:0 4px 12px #00000026}.btn-primary{background:#1a1a2e;color:#eab308}.btn-primary:hover:not(:disabled){background:#16213e}.btn-success{background:#1a1a2e;color:#eab308}.btn-success:hover:not(:disabled){background:#16213e}.word-selected{background:#fef3c7;color:#92400e;font-weight:600;padding:2px 4px;border-radius:4px}.clickable-word{cursor:pointer;padding:2px 4px;border-radius:4px;transition:background .2s}.clickable-word:hover{background:#fef3c7}.clickable-word.selected{background:#fde68a!important;color:#92400e;font-weight:600;margin-right:4px}.progress-circle{width:32px;height:32px;border-radius:50%;border:3px solid #D1D5DB;display:flex;align-items:center;justify-content:center}.progress-circle.completed{background:#1a1a2e;border-color:#1a1a2e;color:#eab308}.progress-circle.unlocked{background:#fff;border-color:#eab308;color:#eab308}.source-card{background:#fff;border:3px solid #1a1a2e;border-radius:16px;padding:32px;transition:all .3s ease;box-shadow:0 4px 12px #1a1a2e1a;cursor:pointer}.source-card:hover{border-color:#0f3460;transform:translateY(-4px);box-shadow:0 12px 24px #1a1a2e33}.source-card h2{color:#1a1a2e;margin-bottom:12px}.source-card p{color:#16213e}.page-container{min-height:100vh;display:flex;flex-direction:column;align-items:center;padding:48px}.page-title{font-size:2.5rem;font-weight:700;color:#1a1a2e;margin-bottom:48px;text-align:center}.source-grid{display:grid;gap:24px;width:100%;max-width:800px}.exercise-header{background:#1a1a2e;color:#fdfbf7;padding:16px 32px;display:flex;justify-content:space-between;align-items:center;box-shadow:0 2px 8px #0000001a}.exercise-header span{font-weight:500;opacity:.9}.header-button{background:#16213e;padding:8px 16px;border-radius:8px;font-size:.875rem;color:#fdfbf7;transition:background .2s}.header-button:hover{background:#0f3460}.exercise-content{max-width:1200px;margin:0 auto;padding:32px;width:100%}.exercise-box{background:#fff;border-radius:16px;box-shadow:0 10px 40px #00000014;border:2px solid #e5e0d5;padding:32px}.progress-tracker{display:flex;justify-content:center;align-items:center;gap:16px;padding:24px;flex-wrap:wrap}.progress-item{display:flex;flex-direction:column;align-items:center;gap:8px}.progress-item span{font-size:.875rem;color:#1a1a2e;font-weight:500}.reset-button{margin-top:48px;font-size:.875rem;color:#888;text-decoration:none;cursor:pointer}.source-text-box{background:#fff;border:3px solid #1a1a2e;border-radius:12px;padding:24px;margin:24px 0;box-shadow:0 4px 12px #1a1a2e1a;font-size:1.1rem;line-height:1.8}.source-text-label{display:inline-block;background:#1a1a2e;color:#eab308;padding:6px 16px;border-radius:8px;font-weight:600;margin-bottom:16px;font-size:.875rem}.reset-button:hover{text-decoration:underline}textarea,select,input{color:#1f2937}