*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-color:#f5f5f5}.app{min-height:100vh}.app-header{background-color:#2c3e50;color:#fff;padding:1rem 2rem;display:flex;justify-content:space-between;align-items:center}.app-header h1{font-size:1.5rem}.app-header nav{display:flex;gap:1rem}.app-header button{background-color:#34495e;color:#fff;border:none;padding:.5rem 1rem;border-radius:4px;cursor:pointer;transition:background-color .2s}.app-header button:hover{background-color:#455a64}.app-header button.active{background-color:#3498db}.app-main{padding:2rem;max-width:1200px;margin:0 auto}.list-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}.list-header h2{color:#2c3e50}.add-btn{background-color:#27ae60;color:#fff;border:none;padding:.75rem 1.5rem;border-radius:4px;cursor:pointer;font-size:1rem}.add-btn:hover{background-color:#219a52}.teacher-list{display:flex;flex-direction:column;gap:1rem}.teacher-card{background:#fff;border:1px solid #ddd;border-radius:8px;padding:1rem}.teacher-card-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:.75rem}.teacher-info{display:flex;flex-wrap:wrap;align-items:center;gap:.75rem}.teacher-name{font-size:1.1rem;color:#2c3e50}.teacher-id{background-color:#3498db;color:#fff;padding:.2rem .5rem;border-radius:4px;font-size:.85rem}.teacher-affiliation{color:#666;font-size:.9rem}.teacher-actions{display:flex;gap:.5rem}.edit-btn{background-color:#3498db;color:#fff;border:none;padding:.4rem .8rem;border-radius:4px;cursor:pointer}.edit-btn:hover{background-color:#2980b9}.delete-btn{background-color:#e74c3c;color:#fff;border:none;padding:.4rem .8rem;border-radius:4px;cursor:pointer}.delete-btn:hover{background-color:#c0392b}.teacher-details{display:flex;flex-direction:column;gap:.75rem}.teacher-credentials{font-size:.9rem;color:#666}.credential-label{margin-right:.5rem}.credential-value{font-family:monospace;background-color:#f5f5f5;padding:.1rem .3rem;border-radius:2px}.teacher-subjects{display:flex;flex-wrap:wrap;gap:.5rem}.subject-group{display:flex;align-items:center;gap:.5rem}.grade-level{font-size:.8rem;color:#666;background-color:#ecf0f1;padding:.2rem .4rem;border-radius:4px}.subject-tags{display:flex;gap:.25rem}.subject-tag{background-color:#3498db;color:#fff;padding:.15rem .4rem;border-radius:3px;font-size:.8rem}.teacher-schedules{background-color:#e8f5e9;padding:.75rem;border-radius:6px;border:1px solid #c8e6c9}.schedules-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:.5rem}.schedules-label{color:#2e7d32;font-weight:700;font-size:.9rem}.toggle-schedules-btn{background-color:#4caf50;color:#fff;border:none;padding:.25rem .75rem;border-radius:4px;cursor:pointer;font-size:.8rem}.toggle-schedules-btn:hover{background-color:#388e3c}.schedule-months{display:flex;flex-wrap:wrap;gap:.5rem}.schedule-month-btn{background-color:#4caf50;color:#fff;border:none;padding:.3rem .6rem;border-radius:4px;cursor:pointer;font-size:.85rem}.schedule-month-btn:hover{background-color:#388e3c}.no-schedule-message{color:#888;font-size:.9rem;font-style:italic}.empty-list{text-align:center;padding:3rem;color:#666}.empty-hint{margin-top:.5rem;font-size:.9rem;color:#888}.teacher-form{background:#fff;border:1px solid #ddd;border-radius:8px;padding:2rem;max-width:800px;margin:0 auto}.teacher-form h2{margin-bottom:1.5rem;color:#2c3e50}.form-group{margin-bottom:1.5rem}.form-group label{display:block;margin-bottom:.5rem;font-weight:500;color:#2c3e50}.form-group input[type=text],.form-group input[type=number]{width:100%;padding:.75rem;border:1px solid #ddd;border-radius:4px;font-size:1rem}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}.id-input-group{display:flex;gap:.5rem}.id-input-group input{flex:1}.regenerate-btn{background-color:#95a5a6;color:#fff;border:none;padding:.5rem 1rem;border-radius:4px;cursor:pointer;white-space:nowrap}.regenerate-btn:hover{background-color:#7f8c8d}.subjects-by-level{display:flex;flex-direction:column;gap:1rem}.level-subjects{padding:1rem;background-color:#f8f9fa;border-radius:4px}.level-subjects h4{margin-bottom:.75rem;color:#2c3e50}.subject-checkboxes{display:flex;flex-wrap:wrap;gap:.75rem}.subject-checkbox{display:flex;align-items:center;gap:.3rem;cursor:pointer}.subject-checkbox input{cursor:pointer}.form-actions{display:flex;justify-content:flex-end;gap:1rem;margin-top:2rem;padding-top:1rem;border-top:1px solid #eee}.cancel-btn{background-color:#95a5a6;color:#fff;border:none;padding:.75rem 1.5rem;border-radius:4px;cursor:pointer;font-size:1rem}.cancel-btn:hover{background-color:#7f8c8d}.submit-btn{background-color:#27ae60;color:#fff;border:none;padding:.75rem 1.5rem;border-radius:4px;cursor:pointer;font-size:1rem}.submit-btn:hover{background-color:#219a52}.url-generator-page{max-width:800px;margin:0 auto}.url-generator-page h2{color:#2c3e50;margin-bottom:1rem}.url-generator-page .description{color:#666;margin-bottom:2rem}.url-generator{background:#fff;border:1px solid #ddd;border-radius:8px;padding:1.5rem;margin-bottom:2rem}.url-inputs{display:flex;gap:1rem;margin-bottom:1.5rem}.input-group{display:flex;flex-direction:column;gap:.5rem}.input-group label{font-weight:500;color:#2c3e50}.input-group input,.input-group select{padding:.5rem;border:1px solid #ddd;border-radius:4px;font-size:1rem}.input-group input[type=number]{width:100px}.generated-url{margin-bottom:1rem}.generated-url label{display:block;margin-bottom:.5rem;font-weight:500;color:#2c3e50}.url-display{display:flex;gap:.5rem}.url-display input{flex:1;padding:.75rem;border:1px solid #ddd;border-radius:4px;font-size:.9rem;background-color:#f8f9fa}.copy-btn{background-color:#3498db;color:#fff;border:none;padding:.75rem 1.5rem;border-radius:4px;cursor:pointer;white-space:nowrap}.copy-btn:hover{background-color:#2980b9}.copy-btn.copied{background-color:#27ae60}.url-actions{display:flex;gap:1rem}.preview-btn{display:inline-block;color:#3498db;text-decoration:none}.preview-btn:hover{text-decoration:underline}.usage-notes{background:#fff;border:1px solid #ddd;border-radius:8px;padding:1.5rem}.usage-notes h3{color:#2c3e50;margin-bottom:1rem}.usage-notes ol{margin-left:1.5rem;color:#555}.usage-notes li{margin-bottom:.5rem}.teacher-submission-container{min-height:100vh;background-color:#f5f5f5;display:flex;justify-content:center;align-items:flex-start;padding:2rem}.teacher-submission-login{background-color:#fff;border-radius:12px;box-shadow:0 4px 20px #0000001a;padding:2rem;max-width:400px;width:100%;margin-top:4rem}.teacher-submission-login h1{margin:0 0 .5rem;color:#2c3e50;font-size:1.5rem;text-align:center}.submission-month-info{text-align:center;color:#666;margin-bottom:2rem;font-size:.95rem}.login-form{display:flex;flex-direction:column;gap:1rem}.login-field{display:flex;flex-direction:column;gap:.5rem}.login-field label{font-weight:700;color:#555;font-size:.9rem}.login-field input{padding:.75rem;border:1px solid #ddd;border-radius:6px;font-size:1rem}.login-field input:focus{outline:none;border-color:#3498db;box-shadow:0 0 0 3px #3498db33}.login-error{background-color:#ffebee;color:#c62828;padding:.75rem;border-radius:6px;font-size:.9rem;text-align:center}.login-btn{background-color:#3498db;color:#fff;border:none;padding:.75rem;border-radius:6px;font-size:1rem;font-weight:700;cursor:pointer;margin-top:.5rem}.login-btn:hover{background-color:#2980b9}.back-link{display:block;text-align:center;margin-top:1.5rem;color:#666;background:none;border:none;cursor:pointer;font-size:.9rem}.back-link:hover{color:#3498db}.teacher-submission-page{background-color:#fff;border-radius:12px;box-shadow:0 4px 20px #0000001a;max-width:900px;width:100%}.submission-header{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.5rem;border-bottom:1px solid #eee;background-color:#2c3e50;color:#fff;border-radius:12px 12px 0 0}.submission-header-left{display:flex;align-items:center;gap:1rem}.submission-header h1{margin:0;font-size:1.25rem}.submission-teacher-name{background-color:#fff3;padding:.25rem .75rem;border-radius:4px;font-size:.9rem}.logout-btn{background-color:transparent;border:1px solid rgba(255,255,255,.5);color:#fff;padding:.5rem 1rem;border-radius:4px;cursor:pointer;font-size:.85rem}.logout-btn:hover{background-color:#ffffff1a}.submission-content{padding:1.5rem}.submission-month-header{margin-bottom:1rem}.submission-month-header h2{margin:0;color:#2c3e50;font-size:1.25rem}.submission-status{display:flex;align-items:center;gap:.5rem;padding:1rem 1.5rem;border-radius:8px;margin-bottom:1.5rem;font-weight:700}.submission-status.submitted{background-color:#e8f5e9;color:#2e7d32;border:2px solid #4caf50}.submission-status.not-submitted{background-color:#fff3e0;color:#e65100;border:2px solid #ff9800}.submission-status .status-icon{font-size:1.25rem}.schedule-calendar-note{background-color:#f0f7ff;padding:.75rem 1rem;border-radius:6px;margin-bottom:1rem;font-size:.85rem;color:#1565c0;border:1px solid #90caf9}.monthly-schedule-calendar{border:1px solid #ddd;border-radius:8px;overflow:hidden;margin-bottom:1.5rem}.schedule-calendar-grid{overflow-x:auto}.calendar-header-row{display:grid;grid-template-columns:100px repeat(7,1fr);background-color:#2c3e50;color:#fff}.calendar-time-header,.calendar-day-name{padding:.5rem;text-align:center;font-weight:700;font-size:.85rem;border-right:1px solid rgba(255,255,255,.2)}.calendar-day-name:last-child{border-right:none}.calendar-week-section{border-bottom:2px solid #ddd}.calendar-week-section:last-child{border-bottom:none}.calendar-date-row{display:grid;grid-template-columns:100px repeat(7,1fr);background-color:#f9f9f9;border-bottom:1px solid #eee}.calendar-date-cell{padding:.25rem;text-align:center;border-right:1px solid #ddd}.calendar-date-cell:last-child{border-right:none}.calendar-date-cell.empty{background-color:#f5f5f5}.date-number{font-weight:700;font-size:.85rem;color:#333}.date-label{background-color:#ecf0f1}.calendar-time-row{display:grid;grid-template-columns:100px repeat(7,1fr);border-bottom:1px solid #eee}.calendar-time-row:last-child{border-bottom:none}.calendar-time-cell{padding:.25rem;text-align:center;background-color:#ecf0f1;border-right:1px solid #ddd;font-size:.65rem}.time-weekday{font-weight:700;color:#333}.time-weekend{color:#777;font-style:italic}.calendar-slot-cell{min-height:30px;border-right:1px solid #ddd;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s}.calendar-slot-cell:last-child{border-right:none}.calendar-slot-cell:hover:not(.disabled):not(.empty):not(.readonly){background-color:#f0f0f0}.calendar-slot-cell.disabled,.calendar-slot-cell.empty{background-color:#f5f5f5;cursor:not-allowed}.calendar-slot-cell.readonly{cursor:default}.calendar-slot-cell.status-ok{background-color:#e8f5e9}.calendar-slot-cell.status-maybe{background-color:#fff3e0}.calendar-slot-cell.status-no{background-color:#ffebee}.status-mark{font-weight:700;font-size:.9rem}.calendar-slot-cell.status-ok .status-mark{color:#388e3c}.calendar-slot-cell.status-maybe .status-mark{color:#f57c00}.calendar-slot-cell.status-no .status-mark{color:#d32f2f}.calendar-legend{display:flex;gap:1.5rem;padding:.75rem 1rem;background-color:#f9f9f9;border-top:1px solid #ddd}.legend-item{display:flex;align-items:center;gap:.5rem;font-size:.9rem}.status-ok{color:#388e3c;font-weight:700}.status-maybe{color:#f57c00;font-weight:700}.status-no{color:#d32f2f;font-weight:700}.submission-actions{display:flex;justify-content:center;align-items:center;gap:1rem;flex-direction:column}.unsaved-warning{background-color:#fff3e0;color:#e65100;padding:.75rem 1.5rem;border-radius:6px;font-weight:700;border:1px solid #ff9800}.save-success-message{background-color:#e8f5e9;color:#2e7d32;padding:.75rem 1.5rem;border-radius:6px;font-weight:700}.save-btn{background-color:#27ae60;color:#fff;border:none;padding:1rem 3rem;border-radius:8px;font-size:1.1rem;font-weight:700;cursor:pointer;transition:background-color .2s}.save-btn:hover:not(:disabled){background-color:#219a52}.save-btn:disabled{background-color:#bdc3c7;cursor:not-allowed}.save-btn.has-changes{background-color:#e67e22;animation:pulse-orange 2s infinite}.save-btn.has-changes:hover{background-color:#d35400}@keyframes pulse-orange{0%,to{box-shadow:0 0 #e67e2266}50%{box-shadow:0 0 0 10px #e67e2200}}.schedule-view-modal{position:fixed;top:0;left:0;right:0;bottom:0;background-color:#00000080;display:flex;justify-content:center;align-items:center;z-index:1000;padding:2rem}.schedule-view-content{background:#fff;border-radius:12px;max-width:900px;width:100%;max-height:90vh;overflow-y:auto}.schedule-view-header{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.5rem;background-color:#2c3e50;color:#fff;border-radius:12px 12px 0 0}.schedule-view-header h3{margin:0}.schedule-view-header .close-btn{background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer;padding:0 .5rem}.schedule-view-header .close-btn:hover{opacity:.8}.schedule-view-content .monthly-schedule-calendar{margin:1rem}@media (max-width: 768px){.app-header{flex-direction:column;gap:1rem;padding:1rem}.app-header nav{width:100%;justify-content:center}.app-main{padding:1rem}.list-header{flex-direction:column;gap:1rem;align-items:stretch}.form-row{grid-template-columns:1fr}.teacher-card-header{flex-direction:column;gap:.75rem}.teacher-actions{width:100%;justify-content:flex-end}.url-inputs{flex-direction:column}.teacher-submission-container{padding:1rem}.teacher-submission-page{border-radius:8px}.submission-header{flex-direction:column;gap:.75rem;border-radius:8px 8px 0 0}.submission-header-left{flex-direction:column;align-items:flex-start;gap:.5rem}.calendar-header-row,.calendar-date-row,.calendar-time-row{grid-template-columns:70px repeat(7,1fr)}.calendar-time-cell{font-size:.55rem;padding:.15rem}.calendar-slot-cell{min-height:25px}.status-mark{font-size:.75rem}.schedule-view-modal{padding:1rem}.schedule-view-content{border-radius:8px}}