.study-calendar-container{max-width:1200px;margin:0 auto;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;padding:10px}.calendar-toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;padding:15px;background:#f8f9fa;border-radius:8px;border:1px solid #e9ecef;flex-wrap:wrap;gap:10px}.calendar-nav{display:flex;align-items:center;gap:15px}.calendar-nav button{background:#007cba;color:#fff;border:none;padding:8px 12px;border-radius:4px;cursor:pointer;font-size:16px;transition:background-color .3s;min-width:40px}.calendar-nav button:hover{background:#005a87}#current-date{font-size:18px;font-weight:600;color:#2c3e50;min-width:200px;text-align:center}.calendar-views{display:flex;gap:5px}.view-btn{background:#6c757d;color:#fff;border:none;padding:8px 16px;border-radius:4px;cursor:pointer;transition:background-color .3s}.view-btn:hover,.view-btn.active{background:#007cba}#add-event-btn{background:#28a745;color:#fff;border:none;padding:10px 20px;border-radius:4px;cursor:pointer;font-weight:600;transition:background-color .3s}#add-event-btn:hover{background:#218838}.view-only{background:#6c757d;color:#fff;padding:10px 20px;border-radius:4px;font-weight:600}#study-calendar{background:#fff;border:1px solid #e9ecef;border-radius:8px;overflow:hidden;position:relative}.calendar-month{display:grid;grid-template-columns:repeat(7,1fr)}.calendar-header{display:grid;grid-template-columns:repeat(7,1fr);background:#007cba;color:#fff;font-weight:600}.calendar-header-cell{padding:15px 10px;text-align:center;border-right:1px solid rgba(255,255,255,.2)}.calendar-header-cell:last-child{border-right:none}.calendar-header-cell:nth-child(6){background:#5a9fd4}.calendar-header-cell:nth-child(7){background:#e57373}.calendar-cell{min-height:120px;border-right:1px solid #e9ecef;border-bottom:1px solid #e9ecef;padding:8px;position:relative;cursor:pointer;transition:background-color .2s}.calendar-cell:hover{background-color:#f8f9fa}.calendar-cell:last-child{border-right:none}.calendar-cell.other-month{background-color:#f8f9fa;color:#6c757d}.calendar-cell.today{background-color:#e3f2fd;border:2px solid #2196f3}.calendar-cell:nth-child(7n-1){background-color:#f8fbff}.calendar-cell:nth-child(7n-1):hover{background-color:#f0f8ff}.calendar-cell:nth-child(7n){background-color:snow}.calendar-cell:nth-child(7n):hover{background-color:#fff5f5}.cell-date{font-weight:600;font-size:14px;margin-bottom:8px;color:#2c3e50;height:20px;display:flex;align-items:center}.cell-events{display:flex;flex-direction:column;gap:3px;margin-top:5px}.event-item{background:#007cba;color:#fff;padding:3px 6px;border-radius:3px;font-size:11px;cursor:pointer;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;transition:opacity 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rgba(255,255,255,.2)}.week-day-header:nth-child(7){background:#5a9fd4}.week-day-header:nth-child(8){background:#e57373}.week-day-cell{border-right:1px solid #e9ecef;border-bottom:1px solid #e9ecef;position:relative;cursor:pointer}.week-day-cell:hover{background-color:#f8f9fa}.calendar-day{display:grid;grid-template-columns:80px 1fr;grid-template-rows:repeat(24,40px)}.day-time-slot{border-right:1px solid #e9ecef;border-bottom:1px solid #e9ecef;padding:10px 5px;font-size:12px;color:#6c757d;text-align:center;background:#f8f9fa}.day-content-cell{border-bottom:1px solid #e9ecef;position:relative;cursor:pointer;padding:5px}.day-content-cell:hover{background-color:#f8f9fa}.study-modal{display:none;position:fixed;z-index:1000;left:0;top:0;width:100%;height:100%;background-color:rgba(0,0,0,.5)}.modal-content{background-color:#fff;margin:2% auto;padding:20px;border-radius:8px;width:90%;max-width:450px;max-height:90vh;overflow-y:auto;position:relative;box-shadow:0 4px 20px rgba(0,0,0,.15)}.close{position:absolute;right:15px;top:15px;font-size:24px;font-weight:700;cursor:pointer;color:#6c757d;z-index:1001}.close:hover{color:#000}#modal-title{margin-top:0;margin-bottom:20px;color:#2c3e50;font-size:20px;padding-right:30px}#event-form{display:flex;flex-direction:column;gap:12px}#event-form label{font-weight:600;color:#2c3e50;margin-bottom:3px;font-size:14px}#event-form input,#event-form textarea,#event-form select{padding:8px;border:1px solid #ddd;border-radius:4px;font-size:14px;transition:border-color .3s}#event-form input:focus,#event-form textarea:focus,#event-form select:focus{outline:none;border-color:#007cba;box-shadow:0 0 0 2px rgba(0,124,186,.2)}#event-form textarea{resize:vertical;min-height:60px}.modal-buttons{display:flex;gap:10px;justify-content:flex-end;margin-top:15px;flex-wrap:wrap}.modal-buttons button{padding:8px 16px;border:none;border-radius:4px;cursor:pointer;font-weight:600;transition:background-color .3s;font-size:14px}.modal-buttons button[type=submit]{background:#28a745;color:#fff}.modal-buttons button[type=submit]:hover{background:#218838}#delete-event-btn{background:#dc3545;color:#fff}#delete-event-btn:hover{background:#c82333}.cancel-btn{background:#6c757d;color:#fff}.cancel-btn:hover{background:#5a6268}.study-countdown{background:linear-gradient(135deg,#007cba,#005a87);color:#fff;padding:30px;border-radius:12px;text-align:center;margin:20px 0;box-shadow:0 4px 15px rgba(0,0,0,.1)}.study-countdown h3{margin:0 0 20px;font-size:24px;font-weight:600}.countdown-display{display:flex;justify-content:center;gap:20px;flex-wrap:wrap}.countdown-item{background:rgba(255,255,255,.2);padding:15px;border-radius:8px;min-width:80px;backdrop-filter:blur(10px)}.countdown-number{display:block;font-size:32px;font-weight:700;line-height:1}.countdown-label{display:block;font-size:14px;margin-top:5px;opacity:.9}.countdown-simple{display:flex;justify-content:center;align-items:center;gap:10px}.countdown-simple .countdown-item{min-width:100px}.countdown-simple .countdown-number{font-size:48px}.study-schedule-list{background:#fff;border:1px solid #e9ecef;border-radius:8px;padding:20px;margin:20px 0}.study-schedule-list h3{margin:0 0 20px;color:#2c3e50;font-size:20px;border-bottom:2px solid #007cba;padding-bottom:10px}.schedule-items{list-style:none;padding:0;margin:0}.schedule-item{display:flex;align-items:flex-start;gap:15px;padding:15px;border-bottom:1px solid #f8f9fa;transition:background-color .2s}.schedule-item:hover{background-color:#f8f9fa}.schedule-item:last-child{border-bottom:none}.event-color{width:4px;height:100%;min-height:40px;border-radius:2px;flex-shrink:0}.event-info h4{margin:0 0 5px;color:#2c3e50;font-size:16px}.event-date{margin:0 0 8px;color:#6c757d;font-size:14px;font-weight:600}.event-description{margin:0 0 5px;color:#6c757d;font-size:14px;line-height:1.4}.event-duration{margin:0;color:#007cba;font-size:13px;font-weight:600}.study-calendar-notice,.study-schedule-notice{background:#e3f2fd;border:1px solid #2196f3;border-radius:8px;padding:20px;text-align:center;margin:20px 0}.study-calendar-notice p,.study-schedule-notice p{margin:0 0 10px;color:#1565c0}.study-calendar-notice a,.study-schedule-notice a{color:#0d47a1;text-decoration:none;font-weight:600}.study-calendar-notice a:hover,.study-schedule-notice a:hover{text-decoration:underline}.countdown-expired{font-size:24px;font-weight:700;color:#e74c3c;text-align:center;padding:20px;background:rgba(255,255,255,.9);border-radius:8px}@media (max-width:768px){.study-calendar-container{padding:5px}.calendar-toolbar{flex-direction:column;gap:15px;align-items:stretch}.calendar-nav{justify-content:center}.calendar-views{justify-content:center}#add-event-btn,.view-only{width:100%;text-align:center}.calendar-cell{min-height:80px;padding:4px}.countdown-display{gap:10px}.countdown-item{min-width:60px;padding:10px}.countdown-number{font-size:24px}.modal-content{margin:5% auto;width:95%;max-height:85vh}.schedule-item{flex-direction:column;gap:10px}.event-color{width:100%;height:4px;min-height:4px}.modal-buttons{justify-content:stretch}.modal-buttons button{flex:1;min-width:0}}@media (max-width:480px){.calendar-header-cell,.cell-date{font-size:12px}.event-item{font-size:10px;padding:2px 4px}.calendar-cell{min-height:60px;padding:2px}#current-date{font-size:16px;min-width:150px}.countdown-item{min-width:50px;padding:8px}.countdown-number{font-size:20px}.countdown-label{font-size:12px}}@keyframes fadeIn{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.event-item{animation:fadeIn .3s ease-out}.modal-content{animation:fadeIn .3s ease-out}.loading{opacity:.6;pointer-events:none;position:relative}.loading:after{content:"";position:absolute;top:50%;left:50%;width:20px;height:20px;margin:-10px 0 0 -10px;border:2px solid #f3f3f3;border-top:2px solid #007cba;border-radius:50%;animation:spin 1s linear infinite;z-index:1000}@keyframes spin{0%{transform:rotate(0deg)}100%{transform:rotate(360deg)}}