@import"https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Noto+Sans+KR:wght@300;400;500;600;700&family=Outfit:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap";:root{--color-stone-50: #FAFAF9;--color-stone-100: #F5F5F4;--color-stone-200: #E7E5E4;--color-stone-300: #D6D3D1;--color-stone-400: #A8A29E;--color-stone-500: #78716C;--color-stone-600: #57534E;--color-stone-700: #44403C;--color-stone-800: #292524;--color-stone-900: #1C1917;--color-accent: #D6D3D1;--color-accent-warm: #A8A29E;--color-accent-highlight: #E7E5E4;--color-forest: #78716C;--color-forest-dark: #57534E;--color-forest-light: #A8A29E;--color-mint: #A8A29E;--color-mint-light: #D6D3D1;--color-mint-pale: #F5F5F4;--color-mint-glow: rgba(168, 162, 158, .12);--color-gold: #B49A6E;--color-gold-light: #C9B08A;--color-gold-pale: #F5F0E8;--color-success: #6D9E78;--color-warning: #B49A6E;--color-error: #C07070;--color-danger: #C07070;--color-info: #7E8FA6;--font-sans: "Inter", "Noto Sans KR", -apple-system, BlinkMacSystemFont, sans-serif;--font-display: "Outfit", "Inter", sans-serif;--font-mono: "JetBrains Mono", "Fira Code", monospace;--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--space-2xl: 48px;--space-3xl: 64px;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--radius-full: 9999px;--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-base: .25s cubic-bezier(.4, 0, .2, 1);--transition-slow: .4s cubic-bezier(.4, 0, .2, 1);--shadow-sm: 0 1px 2px rgba(0, 0, 0, .15);--shadow-md: 0 2px 8px rgba(0, 0, 0, .2);--shadow-lg: 0 4px 16px rgba(0, 0, 0, .25);--sidebar-width: 240px;--header-height: 64px;--max-content-width: 1280px;--color-bg-primary: #1C1917;--color-bg-secondary: #292524;--color-bg-tertiary: #353230;--color-bg-card: #292524;--color-bg-card-hover: #353230;--color-bg-input: #1C1917;--color-border: #3D3836;--color-border-light: #57534E;--color-text-primary: #E7E5E4;--color-text-secondary: #A8A29E;--color-text-muted: #78716C;--gradient-dark: linear-gradient(180deg, #1C1917 0%, #292524 100%);--gradient-card: linear-gradient(145deg, #292524 0%, #302C2A 100%);--gradient-glow: none;--shadow-glow: none}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--color-bg-primary)}::-webkit-scrollbar-thumb{background:var(--color-stone-700);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--color-stone-600)}[data-theme=light]{--color-bg-primary: #FAFAF9;--color-bg-secondary: #F5F5F4;--color-bg-tertiary: #E7E5E4;--color-bg-card: #FFFFFF;--color-bg-card-hover: #FAFAF9;--color-bg-input: #F5F5F4;--color-border: #D6D3D1;--color-border-light: #A8A29E;--color-text-primary: #1C1917;--color-text-secondary: #57534E;--color-text-muted: #78716C;--gradient-dark: linear-gradient(180deg, #FAFAF9 0%, #F5F5F4 100%);--gradient-card: linear-gradient(145deg, #FFFFFF 0%, #FAFAF9 100%);--gradient-glow: none;--shadow-glow: none}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-sans);background:var(--color-bg-primary);color:var(--color-text-primary);line-height:1.6;overflow-x:hidden}a{color:var(--color-mint);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--color-mint-light)}img{max-width:100%;display:block}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:var(--color-bg-secondary)}::-webkit-scrollbar-thumb{background:var(--color-border-light);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--color-text-muted)}.app-layout{display:flex;min-height:100vh}.app-sidebar{position:fixed;left:0;top:0;bottom:0;width:var(--sidebar-width);background:var(--color-bg-primary);border-right:1px solid var(--color-border);display:flex;flex-direction:column;z-index:50;transition:transform 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.icon{font-size:48px;margin-bottom:var(--space-md);opacity:.3}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000d9;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:1000;display:flex;align-items:center;justify-content:center;padding:var(--space-xl);animation:fadeIn var(--transition-fast)}@media (min-width: 1024px){.modal-overlay{padding-left:calc(var(--sidebar-width) + 24px)}}.modal-content{background:var(--color-bg-card);border:1px solid var(--color-border);border-radius:var(--radius-xl);max-width:1050px;max-height:82vh;width:100%;overflow:hidden;display:flex;flex-direction:row;animation:slideUp var(--transition-base)}.modal-image-section{flex:1 1 55%;display:flex;align-items:center;justify-content:center;padding:24px;max-height:82vh;height:82vh;position:relative;overflow:hidden;border-right:1px solid var(--color-border);background:#111318}.modal-image-section img{max-width:calc(100% - 16px);max-height:calc(100% - 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var(--transition-fast)}.student-item:hover{border-color:var(--color-border-light)}.student-item-avatar{grid-row:1 / 3;align-self:center;width:40px;height:40px;border-radius:var(--radius-full);background:var(--gradient-primary);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:600;font-size:14px;flex-shrink:0}.student-item-info{grid-column:2;grid-row:1;min-width:0}.student-item-name{font-size:14px;font-weight:600;color:var(--color-text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.student-item-date{font-size:12px;color:var(--color-text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.welcome-toast{position:fixed;bottom:24px;right:24px;background:var(--color-bg-secondary);border:1px solid var(--color-stone-700);border-left:4px solid var(--color-stone-400);padding:16px 20px;border-radius:8px;box-shadow:var(--shadow-lg);z-index:1000;display:flex;align-items:center;gap:16px;max-width:400px;transform:translateY(100px);opacity:0;transition:all var(--transition-base)}.welcome-toast.active{border-left:4px solid var(--color-mint)}.toast-icon{font-size:24px}.toast-content strong{display:block;font-size:16px;color:var(--color-mint)}.toast-content p{margin:4px 0 0;font-size:14px;color:var(--color-text-muted)}.toast-close{position:absolute;top:12px;right:12px;background:none;border:none;color:var(--color-text-muted);font-size:20px;cursor:pointer;transition:color .2s}.toast-close:hover{color:var(--color-text)}@keyframes slideInDown{0%{transform:translateY(-20px);opacity:0}to{transform:translateY(0);opacity:1}}.student-item-actions{grid-column:2;grid-row:2;display:flex;flex-wrap:wrap;gap:var(--space-sm)}.status-badge{display:inline-flex;align-items:center;padding:2px 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infinite}.server-status-dot.online{background:var(--color-success);box-shadow:0 0 12px var(--color-success)}.server-status-dot.offline{background:var(--color-text-muted);animation:none}.server-status-text{font-size:18px;font-weight:600}.settings-section{background:var(--gradient-card);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-xl);margin-bottom:var(--space-lg)}.settings-section h3{font-size:16px;font-weight:600;color:var(--color-text-primary);margin-bottom:var(--space-lg);padding-bottom:var(--space-md);border-bottom:1px solid var(--color-border)}.settings-form{display:flex;flex-direction:column;gap:var(--space-md)}.settings-form-actions{display:flex;justify-content:flex-end;gap:var(--space-sm);margin-top:var(--space-md)}.loading-spinner{display:inline-block;width:18px;height:18px;border:1.5px solid var(--color-stone-700);border-top-color:var(--color-text-primary);border-radius:50%;animation:spin .8s linear 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#00000080}.grid-line-h{width:100%;height:1px;left:0}.grid-line-v{height:100%;width:1px;top:0}.grid-line-h:nth-child(1){top:33.33%}.grid-line-h:nth-child(2){top:66.66%}.grid-line-v:nth-child(3){left:33.33%}.grid-line-v:nth-child(4){left:66.66%}.tilt-wrapper{perspective:1500px;width:100%;height:100%;display:flex;align-items:center;justify-content:center;min-height:0;min-width:0}.tilt-image-container{display:flex;align-items:center;justify-content:center;position:relative;transition:transform .1s cubic-bezier(.25,.46,.45,.94);transform-style:preserve-3d;will-change:transform;max-width:100%;max-height:100%}.tilt-image-container img{max-width:calc(100% - 16px);max-height:calc(100% - 16px);object-fit:contain;box-shadow:0 20px 50px #0003;border-radius:var(--radius-sm)}.tilt-glare{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none;background:radial-gradient(circle at var(--gx, 50%) var(--gy, 50%),rgba(255,255,255,.3) 0%,transparent 60%);opacity:var(--g-opacity, 0);transition:opacity .3s ease;z-index:2;border-radius:var(--radius-md);mix-blend-mode:overlay}.color-palette{display:flex;gap:8px;margin-top:4px}.color-swatch{width:24px;height:24px;border-radius:50%;border:1px solid rgba(255,255,255,.15);box-shadow:0 2px 4px #0000004d;transition:transform .2s cubic-bezier(.34,1.56,.64,1);cursor:pointer}.color-swatch:hover{transform:scale(1.25);box-shadow:0 4px 8px #00000080}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideInRight{0%{opacity:0;transform:translate(100px)}to{opacity:1;transform:translate(0)}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.skeleton{background:linear-gradient(90deg,#ffffff0d 25%,#ffffff1a,#ffffff0d 75%);background-size:200% 100%;animation:skeleton-loading 1.5s infinite;border-radius:var(--radius-md)}@keyframes skeleton-loading{0%{background-position:200% 0}to{background-position:-200% 0}}.image-skeleton{width:100%;aspect-ratio:1 / 1}.title-skeleton{height:24px;width:60%;margin-bottom:10px}.progress-bar-bg{width:100%;height:8px;background:var(--color-bg-tertiary);border-radius:4px;overflow:hidden}.progress-bar-fill{height:100%;transition:width .5s ease-in-out,background-color .3s}.mobile-menu-btn{display:none;position:fixed;top:15px;right:15px;z-index:1001;background:var(--color-mint);color:#fff;border:none;width:44px;height:44px;border-radius:var(--radius-full);font-size:20px;cursor:pointer;box-shadow:var(--shadow-lg);align-items:center;justify-content:center}.sidebar-overlay{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:#00000080;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:999}.sidebar-bottom{margin-top:auto;border-top:1px solid var(--color-bg-tertiary);padding-top:15px}.sidebar-logout-full-btn{width:100%;display:flex;align-items:center;justify-content:center;gap:10px;padding:12px;background:#ef44441a;color:#ef4444;border:1px solid rgba(239,68,68,.2);border-radius:var(--radius-md);margin-top:10px;font-weight:600;cursor:pointer;transition:all .2s}.sidebar-logout-full-btn:hover{background:#ef4444;color:#fff}.large-textarea{font-size:16px!important;padding:15px!important;line-height:1.5!important;min-height:120px}.large-input{font-size:16px!important;padding:12px 15px!important}.grid-selector{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}.large-range{height:8px;background:var(--color-bg-tertiary);border-radius:4px;-webkit-appearance:none;-moz-appearance:none;appearance:none;width:100%}.large-range::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:20px;height:20px;background:var(--color-mint);border-radius:50%;cursor:pointer;box-shadow:0 0 10px #57b4814d}.generate-btn-important{font-size:18px;font-weight:700;padding:15px;letter-spacing:.5px}@media (max-width: 1024px){.generate-layout,.teacher-grid{grid-template-columns:1fr}}@media (max-width: 768px){.mobile-menu-btn{display:flex}.app-sidebar{position:fixed;left:-280px;z-index:1000;transition:left .3s ease;height:100vh}.app-sidebar.open{width:260px}.app-main{margin-left:0}.page-content{padding:var(--space-md)}.gallery-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr))}.stat-cards{grid-template-columns:1fr 1fr}.modal-content{max-width:100%;max-height:100vh;border-radius:0;flex-direction:column;overflow-y:auto}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}