:root{--color-primary: #008751;--color-secondary: #FCD116;--color-accent: #E8112D;--color-bg-main: #f0f4f8;--color-bg-card: #ffffff;--color-bg-header: #005f38;--color-background: #f0f4f8;--color-text-primary: #2c3e50;--color-text-secondary: #596a7a;--color-text-muted: #8a9ba8;--color-text: #2c3e50;--color-border: #d4d4d0;--color-border-dark: #8a8a80;--color-grade-excellent: #2d5016;--color-grade-bien: #4a7c2e;--color-grade-ab: #7da64f;--color-grade-passable: #d4a017;--color-grade-insuffisant: #c45911;--color-grade-mediocre: #b8001f;--font-primary: "Georgia", "Times New Roman", serif;--font-secondary: "Arial", "Helvetica", sans-serif;--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--space-xxl: 48px;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .1);--shadow-md: 0 2px 8px rgba(0, 0, 0, .12);--shadow-lg: 0 4px 16px rgba(0, 0, 0, .15)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-secondary);font-size:16px;line-height:1.6;color:var(--color-text-primary);background:var(--color-bg-main);-webkit-font-smoothing:antialiased}h1,h2,h3,h4,h5,h6{font-family:var(--font-primary);font-weight:700;line-height:1.3;color:var(--color-primary)}.app-container{min-height:100vh;display:flex;flex-direction:column}.app-header{background:linear-gradient(135deg,var(--color-bg-header) 0%,var(--color-primary) 100%);color:#fff;padding:var(--space-lg) var(--space-md);box-shadow:var(--shadow-md);border-bottom:4px solid var(--color-secondary)}.header-content{max-width:1200px;margin:0 auto}.app-title{font-size:1.75rem;margin-bottom:var(--space-xs);color:#fff;text-transform:uppercase;letter-spacing:1px}.app-subtitle{font-size:.9rem;opacity:.9;font-family:var(--font-secondary);font-weight:400}.header-divider{height:2px;background:var(--color-secondary);margin:var(--space-md) 0;opacity:.6}.student-info{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:var(--space-md);font-size:.875rem}.student-name{font-weight:600}.average-display{display:flex;align-items:center;gap:var(--space-sm);background:#ffffff1a;padding:var(--space-sm) var(--space-md);border-radius:4px;border:1px solid rgba(255,255,255,.2)}.average-label{opacity:.8}.average-value{font-size:1.25rem;font-weight:700;color:var(--color-secondary)}.main-nav{background:#fff;border-bottom:2px solid var(--color-border);box-shadow:var(--shadow-sm);position:sticky;top:0;z-index:100}.nav-container{max-width:1200px;margin:0 auto;display:flex;gap:0}.nav-tab{flex:1;padding:var(--space-md);background:none;border:none;border-bottom:3px solid transparent;font-family:var(--font-secondary);font-size:.9rem;font-weight:600;color:var(--color-text-secondary);cursor:pointer;transition:all .2s ease;text-transform:uppercase;letter-spacing:.5px}.nav-tab:hover{background:var(--color-bg-main);color:var(--color-primary)}.nav-tab.active{color:var(--color-primary);border-bottom-color:var(--color-secondary);background:var(--color-bg-main)}.main-content{flex:1;max-width:1200px;width:100%;margin:0 auto;padding:var(--space-xl) var(--space-md)}.section-title{font-size:1.5rem;margin-bottom:var(--space-lg);padding-bottom:var(--space-sm);border-bottom:3px solid var(--color-secondary);color:var(--color-primary)}.gradebook-container{background:#fff;border:2px solid var(--color-border-dark);border-radius:4px;box-shadow:var(--shadow-md)}.gradebook-header{background:var(--color-primary);color:#fff;padding:var(--space-md);font-family:var(--font-primary);font-size:1.1rem;font-weight:700;text-transform:uppercase;letter-spacing:1px}.grades-table{width:100%;border-collapse:collapse}.grades-table th{background:var(--color-bg-main);padding:var(--space-md);text-align:left;font-weight:700;font-size:.875rem;text-transform:uppercase;color:var(--color-primary);border-bottom:2px solid var(--color-border-dark)}.grades-table td{padding:var(--space-md);border-bottom:1px solid var(--color-border)}.grades-table tr:hover{background:var(--color-bg-main)}.grade-badge{display:inline-block;padding:var(--space-xs) var(--space-md);border-radius:4px;font-weight:700;font-size:1.1rem;min-width:60px;text-align:center;color:#fff}.grade-badge.excellent{background:var(--color-grade-excellent)}.grade-badge.bien{background:var(--color-grade-bien)}.grade-badge.ab{background:var(--color-grade-ab)}.grade-badge.passable{background:var(--color-grade-passable)}.grade-badge.insuffisant{background:var(--color-grade-insuffisant)}.grade-badge.mediocre{background:var(--color-grade-mediocre)}.appreciation{font-style:italic;color:var(--color-text-secondary);font-size:.875rem;margin-top:var(--space-xs)}.no-grades-message{padding:var(--space-xxl);text-align:center;color:var(--color-text-muted);font-style:italic}.exercises-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:var(--space-lg)}.exercise-card{background:#fff;border:2px solid var(--color-border);border-radius:4px;padding:var(--space-lg);box-shadow:var(--shadow-sm);transition:all .2s ease;cursor:pointer}.exercise-card:hover{border-color:var(--color-primary);box-shadow:var(--shadow-md);transform:translateY(-2px)}.exercise-level{display:inline-block;padding:var(--space-xs) var(--space-sm);background:var(--color-primary);color:#fff;font-size:.75rem;font-weight:700;text-transform:uppercase;border-radius:3px;margin-bottom:var(--space-sm)}.exercise-title{font-size:1.1rem;margin-bottom:var(--space-sm);color:var(--color-primary)}.exercise-subject{color:var(--color-text-secondary);font-size:.875rem;margin-bottom:var(--space-md)}.exercise-meta{display:flex;justify-content:space-between;font-size:.8rem;color:var(--color-text-muted);padding-top:var(--space-sm);border-top:1px solid var(--color-border)}.modal-overlay{position:fixed;inset:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:1000;padding:var(--space-md)}.modal-content{background:#fff;border:3px solid var(--color-primary);border-radius:4px;max-width:900px;width:100%;max-height:80vh;overflow-y:auto;box-shadow:var(--shadow-lg)}.modal-header{background:var(--color-primary);color:#fff;padding:var(--space-lg);display:flex;justify-content:space-between;align-items:center}.modal-title{font-size:1.3rem;color:#fff;margin-bottom:.2rem}.exercise-badge{font-size:.8rem;background:#fff3;padding:.2rem .5rem;border-radius:4px}.modal-close-btn{background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer;padding:var(--space-sm);line-height:1}.modal-body{padding:var(--space-xl)}.question-section{background:var(--color-bg-main);border-left:4px solid var(--color-primary);padding:var(--space-lg);margin-bottom:var(--space-lg)}.question-label{font-weight:700;color:var(--color-primary);margin-bottom:var(--space-sm);text-transform:uppercase;font-size:.875rem;letter-spacing:.5px}.question-text{font-size:1.1rem;line-height:1.8;font-family:var(--font-primary)}.answer-section{margin-bottom:var(--space-xl)}.answer-textarea{width:100%;min-height:200px;padding:var(--space-md);border:2px solid var(--color-border);border-radius:4px;font-family:var(--font-secondary);font-size:1rem;line-height:1.6;resize:vertical;transition:border-color .2s ease}.answer-textarea:focus{outline:none;border-color:var(--color-primary)}.answer-textarea::placeholder{color:var(--color-text-muted);font-style:italic}.hints-section{background:#fffbeb;border:2px solid #fcd34d;border-radius:4px;padding:var(--space-lg);margin-bottom:var(--space-lg)}.hint-item{padding:var(--space-md);background:#fff;border-left:3px solid #f59e0b;margin-bottom:var(--space-sm)}.hint-item:last-child{margin-bottom:0}.scandinavian-feedback{margin-top:var(--space-lg)}.feedback-banner{background:#eef2ff;border:1px solid #c7d2fe;padding:var(--space-md);border-radius:8px;display:flex;align-items:center;gap:var(--space-md);margin-bottom:var(--space-lg)}.feedback-emoji{font-size:2rem}.encouragement-text{font-size:1.1rem;color:#3730a3;font-weight:600;margin:0}.feedback-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:var(--space-md);margin-bottom:var(--space-lg)}.feedback-card{padding:var(--space-lg);border-radius:8px;border:1px solid var(--color-border)}.feedback-card h4{margin-top:0;margin-bottom:var(--space-sm);font-size:1rem;display:flex;align-items:center;gap:var(--space-xs)}.feedback-card p{margin:0;font-size:.95rem;line-height:1.5;color:var(--color-text-secondary)}.feedback-card.positive{background:#f0fdf4;border-color:#bbf7d0}.feedback-card.positive h4{color:#166534}.feedback-card.socratic{background:#fffbeb;border-color:#fef08a}.feedback-card.socratic h4{color:#854d0e}.feedback-card.improvement{background:#fff1f2;border-color:#fecdd3}.feedback-card.improvement h4{color:#9f1239}.official-correction-box{background:#f8fafc;border:1px solid #cbd5e1;border-radius:8px;padding:var(--space-lg)}.official-correction-box h4{margin-top:0;margin-bottom:var(--space-sm);color:#334155}.correction-content{font-family:var(--font-primary);font-size:1.05rem;line-height:1.6;color:#475569}.action-buttons{display:flex;gap:var(--space-md);flex-wrap:wrap}.btn{padding:var(--space-md) var(--space-lg);border:none;border-radius:4px;font-weight:700;font-size:.9rem;cursor:pointer;transition:all .2s ease;text-transform:uppercase;letter-spacing:.5px}.btn-primary{background:var(--color-primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--color-bg-header);transform:translateY(-1px);box-shadow:var(--shadow-sm)}.btn-secondary{background:var(--color-secondary);color:var(--color-primary)}.btn-secondary:hover:not(:disabled){background:#e5c100;transform:translateY(-1px)}.btn-outline{background:#fff;color:var(--color-primary);border:2px solid var(--color-primary)}.btn-outline:hover:not(:disabled){background:var(--color-primary);color:#fff}.btn:disabled{opacity:.5;cursor:not-allowed}.dashboard-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:var(--space-lg);margin-bottom:var(--space-xl)}.stat-card{background:var(--color-bg-card, #ffffff);border:2px solid var(--color-border, #d4d4d0);border-radius:4px;padding:var(--space-lg);box-shadow:var(--shadow-sm);text-align:center}.stat-icon{font-size:2.5rem;margin-bottom:var(--space-sm)}.stat-value{font-size:2rem;font-weight:700;color:var(--color-primary, #1a472a);font-family:var(--font-primary);margin-bottom:var(--space-xs)}.stat-label{color:var(--color-text-secondary, #4a4a4a);font-size:.875rem;text-transform:uppercase;letter-spacing:.5px}.progress-chart{background:#fff;border:2px solid var(--color-border);border-radius:4px;padding:var(--space-lg);box-shadow:var(--shadow-sm)}.chart-title{font-size:1.1rem;font-weight:700;color:var(--color-primary);margin-bottom:var(--space-lg)}.progress-bar-container{margin-bottom:var(--space-lg)}.progress-bar-label{display:flex;justify-content:space-between;margin-bottom:var(--space-xs);font-size:.875rem}.progress-bar{height:24px;background:var(--color-bg-main);border:2px solid var(--color-border);border-radius:4px;overflow:hidden}.progress-fill{height:100%;background:var(--color-primary);transition:width .3s ease;display:flex;align-items:center;justify-content:flex-end;padding-right:var(--space-sm);color:#fff;font-weight:700;font-size:.75rem}.methodology-content{background:#fff;border:2px solid var(--color-border);border-radius:4px;padding:var(--space-xl);box-shadow:var(--shadow-sm)}.methodology-section{margin-bottom:var(--space-xl)}.methodology-section h3{font-size:1.2rem;color:var(--color-primary);margin-bottom:var(--space-md);padding-bottom:var(--space-sm);border-bottom:2px solid var(--color-secondary)}.methodology-section ol,.methodology-section ul{padding-left:var(--space-xl);line-height:1.8}.methodology-section li{margin-bottom:var(--space-sm)}.methodology-example{background:var(--color-bg-main);border-left:4px solid var(--color-accent);padding:var(--space-md);margin:var(--space-md) 0;font-style:italic}@media(max-width:768px){.app-title{font-size:1.3rem}.student-info{flex-direction:column;align-items:flex-start}.nav-container{flex-direction:column}.nav-tab{border-bottom:1px solid var(--color-border);border-left:3px solid transparent}.nav-tab.active{border-bottom-color:var(--color-border);border-left-color:var(--color-secondary)}.exercises-grid,.dashboard-grid{grid-template-columns:1fr}.grades-table{font-size:.875rem}.grades-table th,.grades-table td{padding:var(--space-sm)}.action-buttons{flex-direction:column}.btn{width:100%}.feedback-grid{grid-template-columns:1fr}}@media print{.main-nav,.action-buttons,.modal-close-btn{display:none}.modal-overlay{position:static;background:none}.modal-content{border:none;box-shadow:none;max-height:none}body{background:#fff}}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.exercise-card,.stat-card,.gradebook-container{animation:fadeIn .3s ease}