.help-menu{position:fixed;top:0;right:-300px;width:300px;height:100%;background:var(--color-white);box-shadow:-2px 0 5px #0000001a;transition:right .3s ease;z-index:1000;overflow-y:auto}.help-menu.open{right:0}.help-content{padding:20px}.close-button{position:absolute;top:10px;left:10px;background:none;border:none;font-size:18px;cursor:pointer}.help-tab{position:fixed;top:50%;right:0;width:40px;height:40px;background:var(--color-blue);color:var(--color-white);display:flex;align-items:center;justify-content:center;cursor:pointer;border-radius:5px 0 0 5px;z-index:1001;transition:right .3s ease}.help-menu.open+.help-tab{right:300px}.help-menu-toggle{position:absolute;top:1rem;left:-3rem;background-color:var(--color-blue);color:var(--color-white);border:none;padding:.5rem 1rem;border-radius:4px;cursor:pointer;transition:background-color .3s ease}.help-menu-toggle:hover{background-color:var(--color-purple)}.help-menu-content{margin-top:2rem}.dictionary 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var(--color-purple);padding-bottom:10px}.exercice-card p{color:var(--color-black);line-height:1.6;margin-bottom:10px}.exercice-card p strong{color:#333}.tags{margin-top:15px}.tag{display:inline-block;background-color:var(--color-peach);color:var(--color-blue);padding:5px 10px;border-radius:5px;font-size:.85em;margin-right:8px;margin-bottom:8px;border:1px solid var(--color-yellow)}.loading-message,.error-message,.no-exercices-message{text-align:center;font-size:1.2em;color:var(--color-black);margin-top:50px}.error-message{color:var(--color-red);font-weight:700}.login-page{display:flex;flex-direction:column;min-height:100vh;background-color:var(--color-white)}.login-container{flex-grow:1;display:flex;flex-direction:column;justify-content:center;align-items:center;padding:20px}.login-container h2{color:#333;margin-bottom:30px;font-size:2.2em}.login-form{background-color:#fff;padding:40px;border-radius:8px;box-shadow:0 4px 15px #0000001a;width:100%;max-width:400px;box-sizing:border-box}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:8px;color:#555;font-weight:700}.form-group input[type=email],.form-group input[type=password]{width:100%;padding:12px;border:1px solid #ddd;border-radius:5px;font-size:1em;box-sizing:border-box}.form-group input:focus{border-color:var(--color-blue);outline:none;box-shadow:0 0 0 3px var(--color-peach)}.login-button{width:100%;padding:12px;background-color:var(--color-blue);color:#fff;border:none;border-radius:5px;font-size:1.1em;font-weight:700;cursor:pointer;transition:background-color .3s ease}.login-button:hover{background-color:var(--color-green)}.error-message{color:#dc3545;text-align:center;margin-bottom:15px;font-weight:700}.user-list-container{padding:30px;margin:30px auto;max-width:600px;background-color:var(--color-white);border-radius:10px;box-shadow:0 4px 15px #0000001a;font-family:Segoe 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