@import "https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;600;700&display=swap";
:root{--bg-primary:#f5f6fa;--bg-secondary:#fff;--bg-card:#fff;--bg-sidebar:#fff;--bg-hover:#4285f40f;--text-primary:#202124;--text-secondary:#5f6368;--text-muted:#9aa0a6;--accent-primary:#4285f4;--accent-secondary:#1a73e8;--accent-gradient:linear-gradient(135deg,#4285f4,#1a73e8);--success:#0f9d58;--warning:#f9ab00;--danger:#ea4335;--info:#4285f4;--border-color:#e0e0e0;--border-glow:#4285f4;--shadow-sm:0 1px 3px #00000014,0 1px 2px #0000000f;--shadow-md:0 4px 12px #00000014;--shadow-lg:0 8px 24px #0000001a;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--sidebar-width:260px;--header-height:64px;--transition:all .25s cubic-bezier(.4,0,.2,1)}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;font-size:16px}@keyframes pageFadeIn{0%{opacity:0}to{opacity:1}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.animate-spin{animation:1s linear infinite spin}body{background:var(--bg-primary);color:var(--text-primary);min-height:100vh;font-family:Noto Sans KR,-apple-system,BlinkMacSystemFont,sans-serif;overflow-x:hidden}.sidebar{width:var(--sidebar-width);background:var(--bg-sidebar);border-right:1px solid var(--border-color);z-index:100;height:100vh;transition:var(--transition);flex-direction:column;display:flex;position:fixed;top:0;left:0}.sidebar-header{border-bottom:1px solid var(--border-color);padding:24px 20px}.sidebar-logo{align-items:center;gap:12px;display:flex}.sidebar-logo img{object-fit:contain;width:auto;height:36px}.sidebar-logo .logo-icon{background:var(--accent-gradient);border-radius:var(--radius-sm);justify-content:center;align-items:center;width:40px;height:40px;font-size:1.3rem;display:flex;box-shadow:0 2px 8px #4285f440}.sidebar-logo .logo-text{flex-direction:column;display:flex}.sidebar-logo .logo-text h1{color:var(--text-primary);font-size:1.1rem;font-weight:700;line-height:1.3}.sidebar-logo .logo-text span{color:var(--text-muted);font-size:.75rem;font-weight:400}.class-info{border-bottom:1px solid var(--border-color);padding:16px 20px}.class-info .class-badge{color:var(--accent-primary);background:#4285f414;border:1px solid #4285f433;border-radius:6px;align-items:center;gap:6px;padding:4px 10px;font-size:.75rem;font-weight:600;display:inline-flex}.class-info .class-badge:before{content:"";vertical-align:-.2em;background-color:currentColor;width:.9rem;height:.9rem;margin-right:6px;display:inline-block;-webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='black' d='M12 3 2 9h3v11h6v-6h2v6h6V9h3L12 3z'/%3E%3C/svg%3E") 50%/contain no-repeat;mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='black' d='M12 3 2 9h3v11h6v-6h2v6h6V9h3L12 3z'/%3E%3C/svg%3E") 50%/contain no-repeat}.sidebar-nav{flex:1;padding:12px 10px;overflow-y:auto}.nav-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:1.5px;padding:12px 14px 8px;font-size:.7rem;font-weight:600}.nav-item{border-radius:var(--radius-sm);cursor:pointer;transition:var(--transition);color:var(--text-secondary);align-items:center;gap:12px;margin-bottom:2px;padding:14px 18px;font-size:1.05rem;font-weight:500;display:flex;position:relative}.nav-item:hover{background:var(--bg-hover);color:var(--text-primary)}.nav-item.active{color:var(--accent-primary);background:#4285f41a;font-weight:500}.nav-item.active:before{content:"";background:var(--accent-primary);border-radius:0 3px 3px 0;width:3px;height:60%;position:absolute;top:50%;left:0;transform:translateY(-50%)}.nav-item .nav-icon{text-align:center;width:24px;font-size:1.2rem}.nav-item .nav-badge{background:var(--danger);color:#fff;text-align:center;border-radius:10px;min-width:20px;margin-left:auto;padding:2px 7px;font-size:.7rem;font-weight:600}.sidebar-footer{border-top:1px solid var(--border-color);padding:16px 20px}.teacher-profile{align-items:center;gap:10px;display:flex}.teacher-avatar{background:var(--accent-gradient);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:36px;height:36px;font-size:.85rem;font-weight:600;display:flex}.teacher-info{flex:1}.teacher-info .name{color:var(--text-primary);font-size:.85rem;font-weight:600}.teacher-info .role{color:var(--text-muted);font-size:.72rem}.main-content{margin-left:var(--sidebar-width);z-index:1;min-height:100vh;position:relative}.header{height:var(--header-height);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border-color);z-index:50;background:#ffffffeb;justify-content:space-between;align-items:center;padding:0 32px;display:flex;position:sticky;top:0}.header-left{align-items:center;gap:12px;display:flex}.header-left h2{color:var(--text-primary);font-size:1.2rem;font-weight:600}.header-left .page-desc{color:var(--text-muted);border-left:2px solid var(--border-color);padding-left:16px;font-size:.8rem}.header-right{align-items:center;gap:12px;display:flex}.search-box{background:var(--bg-primary);border:1px solid var(--border-color);border-radius:var(--radius-sm);transition:var(--transition);align-items:center;gap:8px;padding:8px 14px;display:flex}.search-box:focus-within{border-color:var(--accent-primary);box-shadow:0 0 0 3px #4285f41f}.search-box input{color:var(--text-primary);background:0 0;border:none;outline:none;width:200px;font-family:inherit;font-size:.85rem}.search-box input::placeholder{color:var(--text-muted)}.search-box .search-icon{color:var(--text-muted);font-size:.9rem}.header-btn{border:1px solid var(--border-color);border-radius:var(--radius-sm);background:var(--bg-secondary);width:38px;height:38px;color:var(--text-secondary);cursor:pointer;transition:var(--transition);justify-content:center;align-items:center;font-size:1.1rem;display:flex;position:relative}.header-btn:hover{background:var(--bg-hover);color:var(--text-primary);border-color:var(--accent-primary)}.header-btn .badge-dot{background:var(--danger);border:2px solid #fff;border-radius:50%;width:8px;height:8px;position:absolute;top:6px;right:6px}.page-content{padding:28px 32px}.page-section{display:none}.page-section.active{animation:.4s fadeIn;display:block}@keyframes fadeIn{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);transition:var(--transition);padding:24px}.card:hover{box-shadow:var(--shadow-md)}.card-header{justify-content:space-between;align-items:center;margin-bottom:20px;display:flex}.card-title{color:var(--text-primary);align-items:center;gap:8px;font-size:1rem;font-weight:600;display:flex}.card-title .icon{font-size:1.1rem}.stats-grid{grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:28px;display:grid}.stat-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);transition:var(--transition);align-items:center;gap:16px;padding:20px;display:flex}.stat-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}.stat-icon{border-radius:var(--radius-sm);justify-content:center;align-items:center;width:48px;height:48px;font-size:1.4rem;display:flex}.stat-icon.blue{background:#e8f0fe}.stat-icon.green{background:#e6f4ea}.stat-icon.orange{background:#fef7e0}.stat-icon.purple{background:#f3e8fd}.stat-info h3{color:var(--text-primary);font-size:1.5rem;font-weight:700;line-height:1}.stat-info p{color:var(--text-muted);margin-top:4px;font-size:.78rem}.table-container{overflow-x:auto}table{border-collapse:collapse;width:100%}table thead th{text-align:left;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;border-bottom:1px solid var(--border-color);white-space:nowrap;background:#fafbfc;padding:12px 16px;font-size:.78rem;font-weight:600}table tbody tr{transition:var(--transition)}table tbody tr:hover{background:#4285f40a}table tbody td{color:var(--text-primary);white-space:nowrap;border-bottom:1px solid #f0f0f0;padding:14px 16px;font-size:.9rem}.status-badge{border-radius:20px;align-items:center;gap:5px;padding:4px 10px;font-size:.78rem;font-weight:500;display:inline-flex}.status-badge.submitted{color:var(--success);background:#e6f4ea}.status-badge.late{color:#e37400;background:#fef7e0}.status-badge.missing{color:var(--danger);background:#fce8e6}.status-badge:before{content:"";border-radius:50%;width:6px;height:6px}.status-badge.submitted:before{background:var(--success)}.status-badge.late:before{background:#e37400}.status-badge.missing:before{background:var(--danger)}.announcement-list{flex-direction:column;gap:12px;display:flex}.announcement-item{border-radius:var(--radius-sm);border-left:3px solid var(--accent-primary);transition:var(--transition);background:#f8f9ff;align-items:flex-start;gap:14px;padding:16px;display:flex}.announcement-item:hover{background:#eef2ff}.announcement-item .ann-icon{margin-top:2px;font-size:1.4rem}.announcement-item .ann-content h4{color:var(--text-primary);margin-bottom:4px;font-size:.93rem;font-weight:600}.announcement-item .ann-content p{color:var(--text-secondary);font-size:.82rem;line-height:1.5}.announcement-item .ann-content .ann-meta{color:var(--text-muted);margin-top:6px;font-size:.72rem}.activity-list{flex-direction:column;gap:10px;margin-top:16px;display:flex}.activity-item{border-radius:var(--radius-sm);transition:var(--transition);align-items:center;gap:12px;padding:10px 14px;display:flex}.activity-item:hover{background:#f5f6fa}.activity-avatar{color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:32px;height:32px;font-size:.75rem;font-weight:600;display:flex}.activity-text{color:var(--text-secondary);flex:1;font-size:.85rem}.activity-text strong{color:var(--text-primary);font-weight:600}.activity-time{color:var(--text-muted);white-space:nowrap;font-size:.72rem}.grid-2{grid-template-columns:1fr 1fr;gap:20px;margin-bottom:24px;display:grid}.grid-3{grid-template-columns:repeat(3,1fr);gap:20px;display:grid}.assignment-list-section{margin-bottom:28px}.assignment-list{flex-direction:column;gap:12px;display:flex}.assignment-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);transition:var(--transition);cursor:pointer;align-items:center;gap:16px;padding:18px 20px;display:flex}.assignment-card:hover{border-color:var(--accent-primary);box-shadow:var(--shadow-sm);transform:translate(4px)}.assignment-card .asgn-icon{border-radius:var(--radius-sm);flex-shrink:0;justify-content:center;align-items:center;width:44px;height:44px;font-size:1.3rem;display:flex}.assignment-card .asgn-icon.blue{background:#e8f0fe}.assignment-card .asgn-icon.green{background:#e6f4ea}.assignment-card .asgn-icon.purple{background:#f3e8fd}.assignment-card .asgn-info{flex:1}.assignment-card .asgn-info h4{margin-bottom:3px;font-size:.95rem;font-weight:600}.assignment-card .asgn-info p{color:var(--text-muted);font-size:.8rem}.assignment-card .asgn-progress{text-align:right}.assignment-card .asgn-progress .progress-text{color:var(--text-secondary);margin-bottom:6px;font-size:.82rem}.progress-bar{background:#e8eaed;border-radius:3px;width:120px;height:6px;overflow:hidden}.progress-bar .progress-fill{background:var(--accent-gradient);border-radius:3px;height:100%;transition:width .6s}.quiz-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);transition:var(--transition);cursor:pointer;padding:24px}.quiz-card:hover{border-color:var(--accent-primary);box-shadow:var(--shadow-lg);transform:translateY(-4px)}.quiz-card .quiz-header{justify-content:space-between;align-items:center;margin-bottom:14px;display:flex}.quiz-card .quiz-header .quiz-icon{border-radius:var(--radius-sm);justify-content:center;align-items:center;width:44px;height:44px;font-size:1.3rem;display:flex}.quiz-card .quiz-status{border-radius:20px;padding:4px 10px;font-size:.72rem;font-weight:500}.quiz-card .quiz-status.active{color:var(--success);background:#e6f4ea}.quiz-card .quiz-status.scheduled{color:var(--info);background:#e8f0fe}.quiz-card .quiz-status.ended{color:var(--text-muted);background:#f1f3f4}.quiz-card h4{margin-bottom:6px;font-size:1rem;font-weight:600}.quiz-card .quiz-meta{color:var(--text-muted);margin-bottom:16px;font-size:.8rem}.quiz-card .quiz-stats{gap:16px;display:flex}.quiz-card .quiz-stat{color:var(--text-secondary);font-size:.8rem}.quiz-card .quiz-stat span{color:var(--text-primary);font-weight:600}.discussion-wall{flex-direction:column;gap:20px;max-width:900px;margin:0 auto;display:flex}.wall-topic-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:24px}.topic-header{justify-content:space-between;align-items:flex-start;margin-bottom:16px;display:flex}.topic-author{align-items:center;gap:12px;display:flex}.author-avatar{color:#fff;border-radius:50%;justify-content:center;align-items:center;width:40px;height:40px;font-weight:700;display:flex}.author-avatar.teacher{background:var(--accent-gradient)}.author-avatar.student{font-size:.85rem}.author-info{flex-direction:column;display:flex}.author-name{color:var(--text-primary);font-size:.95rem;font-weight:600}.author-time{color:var(--text-muted);font-size:.75rem}.topic-badge{color:var(--success);background:#e6f4ea;border-radius:20px;padding:4px 10px;font-size:.75rem;font-weight:600}.topic-title{color:var(--text-primary);margin-bottom:12px;font-size:1.3rem;font-weight:700}.topic-content{color:var(--text-secondary);margin-bottom:20px;font-size:.95rem;line-height:1.6}.topic-actions{border-top:1px solid #f0f0f0;gap:12px;padding-top:16px;display:flex}.action-btn{color:var(--text-secondary);cursor:pointer;transition:var(--transition);background:0 0;border:none;border-radius:20px;align-items:center;gap:6px;padding:6px 12px;font-size:.85rem;font-weight:500;display:flex}.action-btn:hover{color:var(--text-primary);background:#f1f3f4}.action-btn.small{padding:4px 8px;font-size:.8rem}.wall-replies{flex-direction:column;gap:16px;display:flex}.reply-thread{flex-direction:column;gap:12px;display:flex}.reply-card{border:1px solid var(--border-color);border-radius:var(--radius-md);background:#fff;padding:16px 20px}.reply-card.nested{background:#f8f9fa;border-left:3px solid #dadce0;margin-left:48px}.reply-content{color:var(--text-primary);margin:12px 0;font-size:.9rem;line-height:1.5}.reply-input-wrapper{align-items:flex-start;gap:12px;margin-top:12px;display:flex}.input-box-container{border:1px solid var(--border-color);border-radius:var(--radius-md);transition:var(--transition);background:#fff;flex:1;overflow:hidden}.input-box-container:focus-within{border-color:var(--accent-primary);box-shadow:0 0 0 3px #4285f41a}.input-box-container textarea{resize:none;border:none;outline:none;width:100%;padding:16px;font-family:inherit;font-size:.9rem}.input-actions{background:#fafbfc;border-top:1px solid #f0f0f0;justify-content:space-between;align-items:center;padding:8px 16px 12px;display:flex}.icon-btn{cursor:pointer;color:var(--text-muted);background:0 0;border:none;font-size:1.2rem;transition:color .2s}.icon-btn:hover{color:var(--accent-primary)}.btn-sm{padding:6px 14px;font-size:.8rem}.tools-grid{grid-template-columns:repeat(3,1fr);gap:24px;display:grid}.tool-card{background:var(--bg-card);border:1px solid 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.tool-link{color:var(--accent-primary);transition:var(--transition);align-items:center;gap:6px;font-size:.82rem;font-weight:500;display:inline-flex}.tool-card:hover .tool-link{gap:10px}.section-header{justify-content:space-between;align-items:center;margin-bottom:24px;display:flex}.section-header h2{align-items:center;gap:10px;font-size:1.3rem;font-weight:700;display:flex}.section-header h2 .icon{font-size:1.4rem}.section-header .section-actions{gap:8px;display:flex}.btn{border-radius:var(--radius-sm);cursor:pointer;transition:var(--transition);border:none;align-items:center;gap:6px;padding:8px 16px;font-family:inherit;font-size:.82rem;font-weight:500;display:inline-flex}.btn-primary{background:var(--accent-gradient);color:#fff;box-shadow:0 2px 8px #4285f440}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 4px 12px #4285f466}.btn-secondary{color:var(--text-secondary);border:1px solid var(--border-color);background:#f1f3f4}.btn-secondary:hover{border-color:var(--accent-primary);color:var(--text-primary);background:#e8f0fe}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:#dadce0;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#bdc1c6}@media (max-width:1200px){.stats-grid,.tools-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width:768px){.sidebar{transform:translate(-100%)}.main-content{margin-left:0}.stats-grid,.grid-2,.tools-grid{grid-template-columns:1fr}}.dashboard-header{align-items:center;margin-bottom:16px;display:flex}.dashboard-header h3{align-items:center;gap:8px;font-size:1.1rem;font-weight:600;display:flex}.dashboard-grid{grid-template-columns:repeat(2,1fr);gap:20px;margin-bottom:28px;display:grid}.dashboard-card{flex-direction:column;display:flex}.chart-container{justify-content:center;width:100%;height:200px;display:flex;position:relative}.dashboard-flex-center{justify-content:center;align-items:center;position:relative}.collaboration-score{text-align:center;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.collaboration-score .score-value{color:var(--text-primary);font-size:2rem;font-weight:700}.collaboration-score .score-unit{color:var(--text-muted);font-size:.9rem}.heatmap-container{flex:1;justify-content:center;align-items:center;margin-bottom:12px;display:flex}.heatmap-container table{border-collapse:collapse;width:100%}.heatmap-container th{color:var(--text-muted);text-align:center;padding:2px;font-size:.72rem;font-weight:500}.heatmap-container td{padding:1px}.heatmap-cell{aspect-ratio:1;background:var(--bg-hover);transition:var(--transition);cursor:pointer;border-radius:3px;width:100%;height:100%;display:block}.heatmap-cell:hover{z-index:2;position:relative;transform:scale(1.1);box-shadow:0 1px 3px #00000026}.heatmap-legend{color:var(--text-muted);justify-content:space-between;align-items:center;font-size:.75rem;display:flex}.legend-gradient{background:linear-gradient(90deg,#e0eaff,#3b82f6,#1e3a8a);border-radius:4px;flex:1;height:8px;margin:0 10px}.dashboard-card-thermo{flex-direction:row;flex:1;justify-content:center;align-items:center;gap:32px;display:flex}.thermometer-vertical{flex-direction:column;align-items:center;padding-bottom:24px;display:flex;position:relative}.thermo-tube{z-index:1;background:#f3f4f6;border:2px solid #e5e7eb;border-bottom:none;border-radius:10px 10px 0 0;flex-direction:column;justify-content:flex-end;width:18px;height:110px;display:flex;position:relative;overflow:hidden}.thermo-fill-vertical{background:#ef4444;width:100%;transition:height 1s ease-in-out}.thermo-bulb{z-index:2;background:#ef4444;border:2px solid #e5e7eb;border-radius:50%;width:36px;height:36px;position:absolute;bottom:0}.thermo-info{flex-direction:column;align-items:center;gap:8px;display:flex}.thermo-value{color:#ef4444;font-size:2rem;font-weight:700}.thermo-icon{font-size:1.8rem}.emotion-tags{flex-wrap:wrap;justify-content:center;gap:8px;display:flex}.emotion-tag{border-radius:12px;padding:4px 10px;font-size:.8rem;font-weight:500}.emotion-tag.positive{color:#166534;background:#dcfce7}.emotion-tag.neutral{color:#374151;background:#f3f4f6}.emotion-tag.negative{color:#991b1b;background:#fee2e2}@media (max-width:1024px){.dashboard-grid{grid-template-columns:1fr}}.laco-typing-indicator{align-self:flex-start;align-items:flex-end;gap:8px;max-width:85%;display:inline-flex}.laco-typing-avatar{color:#4f46e5;background:#eef2ff;border:1px solid #c7d2fe;border-radius:50%;flex:0 0 28px;place-items:center;width:28px;height:28px;font-size:.8rem;font-weight:800;display:grid}.laco-typing-bubble{color:#475569;background:#f8fafc;border:1px solid #e2e8f0;border-radius:12px 12px 12px 3px;align-items:center;gap:10px;min-height:38px;padding:9px 13px;display:inline-flex;box-shadow:0 1px 2px #0f172a0d}.laco-typing-text{white-space:nowrap;font-size:.9rem;font-weight:600}.laco-typing-dots{align-items:center;gap:4px;display:inline-flex}.laco-typing-dots span{background:#818cf8;border-radius:50%;width:5px;height:5px;animation:1.05s ease-in-out infinite lacoTypingDot}.laco-typing-dots span:nth-child(2){animation-delay:.15s}.laco-typing-dots span:nth-child(3){animation-delay:.3s}@keyframes lacoTypingDot{0%,80%,to{opacity:.35;transform:translateY(0)}40%{opacity:1;transform:translateY(-3px)}}