:root{--bg-app:#0d0e12;--bg-surface:#151720;--bg-surface-hover:#1c1f2b;--bg-surface-active:#222637;--border-color:#232635;--border-color-hover:#32374b;--text-primary:#f1f5f9;--text-secondary:#94a3b8;--text-muted:#64748b;--primary:#6366f1;--primary-glow:#6366f126;--primary-border:#6366f166;--accent:#14b8a6;--accent-cyan:#06b6d4;--color-correct:#10b981;--bg-correct:#10b98114;--border-correct:#10b9814d;--glow-correct:#10b98126;--color-wrong:#f43f5e;--bg-wrong:#f43f5e14;--border-wrong:#f43f5e4d;--glow-wrong:#f43f5e26;--color-unmarked:#64748b;--bg-unmarked:#64748b0d;--border-unmarked:#64748b33;--highlight-glow:#6366f159;--sans-font:"Plus Jakarta Sans", system-ui, -apple-system, sans-serif;--mono-font:"JetBrains Mono", monospace;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -1px #0000000f;--shadow-lg:0 10px 15px -3px #0000004d, 0 4px 6px -2px #00000026;--shadow-glow:0 0 20px #6366f126;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-full:9999px;box-sizing:border-box}[data-theme=light]{--bg-app:#f0f2f8;--bg-surface:#fff;--bg-surface-hover:#e8ecf4;--bg-surface-active:#dde2ed;--border-color:#d1d9e8;--border-color-hover:#b8c3d8;--text-primary:#0f172a;--text-secondary:#334155;--text-muted:#64748b;--primary:#4f46e5;--primary-glow:#4f46e51a;--primary-border:#4f46e559;--accent:#0d9488;--accent-cyan:#0891b2;--color-correct:#059669;--bg-correct:#05966914;--border-correct:#05966959;--glow-correct:#0596691f;--color-wrong:#e11d48;--bg-wrong:#e11d4812;--border-wrong:#e11d4859;--glow-wrong:#e11d481f;--color-unmarked:#64748b;--bg-unmarked:#64748b0f;--border-unmarked:#64748b40;--highlight-glow:#4f46e540;--shadow-sm:0 1px 3px 0 #0f172a12;--shadow-md:0 4px 6px -1px #0f172a14, 0 2px 4px -1px #0f172a0d;--shadow-lg:0 10px 25px -3px #0f172a1f, 0 4px 8px -2px #0f172a12;--shadow-glow:0 0 20px #4f46e51f}*{box-sizing:inherit;margin:0;padding:0}body{font-family:var(--sans-font);background-color:var(--bg-app);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100vh;margin:0;transition:background-color .3s,color .3s;overflow-x:hidden}#root{flex-direction:column;width:100%;min-height:100vh;display:flex}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-app)}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--border-color-hover)}input,textarea,select,button{font-family:inherit;font-size:inherit;color:inherit}button{cursor:pointer;background:0 0;border:none;transition:all .2s cubic-bezier(.4,0,.2,1)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes fadeInOpacity{0%{opacity:0}to{opacity:1}}@keyframes scaleIn{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}@keyframes pulseBorder{0%{border-color:var(--primary-border);box-shadow:0 0 0 0 var(--primary-glow)}50%{border-color:var(--primary);box-shadow:0 0 0 4px var(--primary-glow)}to{border-color:var(--primary-border);box-shadow:0 0 0 0 var(--primary-glow)}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}.animate-fade-in{animation:.3s cubic-bezier(.4,0,.2,1) forwards fadeIn}.animate-fade-in-opacity{animation:.3s cubic-bezier(.4,0,.2,1) forwards fadeInOpacity}.animate-scale-in{animation:.25s cubic-bezier(.34,1.56,.64,1) forwards scaleIn}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.auth-wrapper{background:radial-gradient(circle at 10% 20%, #6366f114 0%, transparent 40%), radial-gradient(circle at 90% 80%, #14b8a614 0%, transparent 40%), var(--bg-app);justify-content:center;align-items:center;min-height:100vh;padding:24px;display:flex}.auth-card{background-color:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-lg);width:100%;max-width:440px;box-shadow:var(--shadow-lg);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);padding:40px 32px}.auth-header{text-align:center;margin-bottom:32px}.auth-logo{background:linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);border-radius:var(--radius-md);color:#fff;justify-content:center;align-items:center;width:54px;height:54px;margin-bottom:16px;display:inline-flex;box-shadow:0 4px 12px #6366f14d}.auth-title{letter-spacing:-.5px;color:var(--text-primary);margin-bottom:8px;font-size:28px;font-weight:800}.auth-subtitle{color:var(--text-secondary);font-size:14px}.auth-tabs{background-color:var(--bg-app);border-radius:var(--radius-md);border:1px solid var(--border-color);margin-bottom:24px;padding:4px;display:flex}.auth-tab{text-align:center;border-radius:var(--radius-sm);color:var(--text-secondary);flex:1;padding:10px;font-size:14px;font-weight:600}.auth-tab.active{background-color:var(--bg-surface);color:var(--text-primary);box-shadow:var(--shadow-sm);border:1px solid var(--border-color)}.auth-form{flex-direction:column;gap:20px;display:flex}.form-group{flex-direction:column;gap:8px;display:flex}.form-label{text-transform:uppercase;letter-spacing:.5px;color:var(--text-secondary);font-size:12px;font-weight:700}.input-wrapper{align-items:center;display:flex;position:relative}.input-icon{color:var(--text-muted);position:absolute;left:14px}.form-input{background-color:var(--bg-app);border:1px solid var(--border-color);border-radius:var(--radius-md);width:100%;color:var(--text-primary);outline:none;padding:12px 14px 12px 42px;font-size:15px;transition:all .2s}.form-input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-glow)}.auth-btn{background:linear-gradient(135deg, var(--primary) 0%, #4f46e5 100%);color:#fff;border-radius:var(--radius-md);width:100%;margin-top:8px;padding:14px;font-size:16px;font-weight:600;box-shadow:0 4px 12px #6366f133}.auth-btn:hover{transform:translateY(-1px);box-shadow:0 6px 16px #6366f14d}.auth-btn:active{transform:translateY(1px)}.auth-message{border-radius:var(--radius-md);text-align:center;padding:12px;font-size:14px}.auth-message.error{background-color:var(--bg-wrong);border:1px solid var(--border-wrong);color:var(--color-wrong)}.auth-message.success{background-color:var(--bg-correct);border:1px solid var(--border-correct);color:var(--color-correct)}.app-header{background-color:var(--bg-surface);border-bottom:1px solid var(--border-color);z-index:1000;justify-content:space-between;align-items:center;padding:16px 32px;display:flex;position:sticky;top:0}.header-brand{align-items:center;gap:12px;display:flex}.sidebar-toggle-btn{border-radius:var(--radius-md);width:36px;height:36px;color:var(--text-secondary);cursor:pointer;background-color:#0000;border:1px solid #0000;flex-shrink:0;justify-content:center;align-items:center;margin-right:4px;padding:0;transition:all .2s cubic-bezier(.4,0,.2,1);display:flex}.sidebar-toggle-btn:hover{background-color:var(--bg-surface-hover);color:var(--text-primary);border-color:var(--border-color)}.header-logo{background:linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);border-radius:var(--radius-sm);color:#fff;justify-content:center;align-items:center;width:38px;height:38px;display:flex;box-shadow:0 2px 8px #6366f133}.header-title{letter-spacing:-.5px;background:linear-gradient(135deg, var(--text-primary) 30%, var(--text-secondary) 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;font-size:20px;font-weight:800}.header-actions{align-items:center;gap:16px;display:flex}.user-badge{background-color:var(--bg-app);border:1px solid var(--border-color);border-radius:var(--radius-full);align-items:center;gap:8px;padding:6px 12px;display:flex}.user-avatar{border-radius:var(--radius-full);background:var(--primary-glow);width:24px;height:24px;color:var(--primary);border:1px solid var(--primary-border);justify-content:center;align-items:center;font-size:12px;font-weight:700;display:flex}.user-name{color:var(--text-primary);font-size:13px;font-weight:600}.admin-toggle-btn{background-color:var(--primary-glow);border:1px solid var(--primary-border);color:var(--primary);border-radius:var(--radius-md);align-items:center;gap:6px;padding:8px 16px;font-size:13px;font-weight:600;display:flex}.admin-toggle-btn:hover{background-color:var(--primary);color:#fff}.theme-toggle-btn{border-radius:var(--radius-full);border:1px solid var(--border-color);width:36px;height:36px;color:var(--text-secondary);background-color:#0000;flex-shrink:0;justify-content:center;align-items:center;transition:all .25s cubic-bezier(.4,0,.2,1);display:flex}.theme-toggle-btn:hover{background-color:var(--bg-surface-hover);border-color:var(--primary-border);color:var(--primary);box-shadow:0 0 12px var(--primary-glow);transform:rotate(20deg)scale(1.1)}.theme-toggle-btn:active{transform:rotate(0)scale(.95)}.logout-btn{border:1px solid var(--border-color);color:var(--text-secondary);border-radius:var(--radius-md);align-items:center;gap:6px;padding:8px 14px;font-size:13px;font-weight:600;display:flex}.logout-btn:hover{background-color:var(--bg-surface-hover);color:var(--color-wrong);border-color:var(--border-wrong)}.app-main-wrapper{flex-direction:column;height:100vh;display:flex;overflow:hidden}@media (width>=1025px){html,body,#root{height:100vh;overflow:hidden}}.app-container{flex:1;height:calc(100vh - 71px);display:flex;position:relative;overflow:hidden}@media (width<=1024px){.app-container{height:calc(100vh - 71px);overflow:hidden}}.app-sidebar{background-color:var(--bg-surface);border-right:1px solid var(--border-color);z-index:5;flex-direction:column;flex-shrink:0;gap:24px;width:320px;padding:24px;transition:margin-left .3s cubic-bezier(.4,0,.2,1),opacity .3s cubic-bezier(.4,0,.2,1);display:flex;overflow-y:auto}.app-container.sidebar-collapsed .app-sidebar{opacity:0;pointer-events:none;margin-left:-320px}.sidebar-backdrop{display:none}@media (width<=1024px){.app-sidebar{z-index:1010;opacity:0;pointer-events:none;width:280px;height:100vh;margin-left:-280px;position:fixed;top:0;bottom:0;left:0;overflow-y:auto;box-shadow:0 0 24px #00000073}.app-container.sidebar-open .app-sidebar{opacity:1;pointer-events:auto;margin-left:0}.app-container.sidebar-collapsed .app-sidebar{opacity:0;pointer-events:none;margin-left:-280px}.sidebar-backdrop{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1009;background-color:#00000073;animation:.2s ease-out fadeIn;display:block;position:fixed;inset:0}}.sidebar-section{flex-direction:column;gap:12px;display:flex}.sidebar-section-title{text-transform:uppercase;letter-spacing:.75px;color:var(--text-muted);justify-content:space-between;align-items:center;font-size:12px;font-weight:800;display:flex}.stats-card{background-color:var(--bg-app);border:1px solid var(--border-color);border-radius:var(--radius-md);flex-direction:column;gap:14px;padding:16px;display:flex}.stats-circle-container{align-items:center;gap:16px;display:flex}.stats-circle{justify-content:center;align-items:center;width:68px;height:68px;display:flex;position:relative}.stats-circle svg{transform:rotate(-90deg)}.circle-bg{stroke:var(--border-color)}.circle-fill{stroke:var(--primary);transition:stroke-dasharray .35s ease-in-out}.stats-percent-text{color:var(--text-primary);font-size:16px;font-weight:800}.stats-summary-text{flex-direction:column;gap:2px;display:flex}.stats-summary-num{font-size:18px;font-weight:800}.stats-summary-lbl{color:var(--text-secondary);font-size:12px}.progress-rows{flex-direction:column;gap:10px;display:flex}.progress-row{justify-content:space-between;align-items:center;font-size:13px;display:flex}.progress-row-lbl{color:var(--text-secondary);align-items:center;gap:8px;display:flex}.progress-dot{border-radius:var(--radius-full);width:8px;height:8px}.progress-dot.correct{background-color:var(--color-correct)}.progress-dot.wrong{background-color:var(--color-wrong)}.progress-dot.unmarked{background-color:var(--color-unmarked)}.progress-row-num{color:var(--text-primary);font-weight:700}.progress-bar-total{background-color:var(--border-color);border-radius:var(--radius-full);width:100%;height:6px;margin-top:4px;display:flex;overflow:hidden}.progress-bar-fill{height:100%;transition:width .3s}.progress-bar-fill.correct{background-color:var(--color-correct)}.progress-bar-fill.wrong{background-color:var(--color-wrong)}.day-grid{grid-template-columns:repeat(4,1fr);gap:8px;display:grid}.day-btn{aspect-ratio:1;background-color:var(--bg-app);border:1px solid var(--border-color);border-radius:var(--radius-md);flex-direction:column;justify-content:center;align-items:center;padding:8px 4px;transition:all .2s;display:flex;position:relative}.day-btn:hover{border-color:var(--border-color-hover);background-color:var(--bg-surface-hover);transform:translateY(-2px)}.day-btn.active{border-color:var(--primary);background-color:var(--primary-glow);box-shadow:0 0 10px #6366f126}.day-btn-num{color:var(--text-primary);font-size:14px;font-weight:800}.day-btn.active .day-btn-num{color:var(--primary)}.day-btn-lbl{color:var(--text-muted);text-transform:uppercase;margin-top:1px;font-size:9px;font-weight:600}.day-mini-progress{background-color:var(--border-color);border-radius:var(--radius-full);height:3px;position:absolute;bottom:6px;left:6px;right:6px;overflow:hidden}.day-mini-progress-fill{background-color:var(--color-correct);border-radius:var(--radius-full);height:100%}.kb-card{background-color:var(--bg-app);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:14px}.kb-list{flex-direction:column;gap:8px;margin-top:8px;display:flex}.kb-item{justify-content:space-between;align-items:center;font-size:12px;display:flex}.kb-label{color:var(--text-secondary)}.kb-keys{gap:4px;display:flex}.kb-key{font-family:var(--mono-font);background-color:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-primary);padding:1px 6px;font-size:11px;font-weight:700;box-shadow:0 1px 1px #0003}.app-content{background-color:var(--bg-app);flex-direction:column;flex:1;min-width:0;display:flex;overflow:hidden}.content-toolbar{background-color:var(--bg-surface);border-bottom:1px solid var(--border-color);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;padding:16px 32px;display:flex}.search-container{flex:1;min-width:200px;max-width:380px}.search-input-wrapper{align-items:center;display:flex;position:relative}.search-icon{color:var(--text-muted);position:absolute;left:14px}.search-input{background-color:var(--bg-app);border:1px solid var(--border-color);border-radius:var(--radius-md);outline:none;width:100%;padding:10px 14px 10px 38px;font-size:14px;transition:all .2s}.search-input:focus{border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-glow)}.toolbar-controls{flex-wrap:wrap;align-items:center;gap:16px;display:flex}.control-group{background-color:var(--bg-app);border:1px solid var(--border-color);border-radius:var(--radius-md);align-items:center;gap:8px;padding:4px;display:flex}.control-label{color:var(--text-secondary);padding-left:8px;font-size:12px;font-weight:700}.control-btn{border-radius:var(--radius-sm);color:var(--text-secondary);padding:6px 12px;font-size:12px;font-weight:600}.control-btn.active{background-color:var(--bg-surface);color:var(--text-primary);border:1px solid var(--border-color);box-shadow:var(--shadow-sm)}.shuffle-banner{border-bottom:1px solid #0000;flex-shrink:0;align-items:center;gap:8px;padding:8px 32px;font-size:12px;font-weight:700;display:flex}.shuffle-banner-cross{color:var(--accent);background-color:#14b8a614;border-color:#14b8a640}.shuffle-banner-self{color:var(--primary);background-color:#6366f114;border-color:#6366f140}.shuffle-banner span{flex:1}.shuffle-banner-btn{opacity:.8;color:inherit;padding:0;font-size:11px;font-weight:600;text-decoration:underline}.shuffle-banner-btn:hover{opacity:1}.words-viewport{flex:1;justify-content:center;padding:32px;display:flex;overflow-y:auto}.words-column{flex-direction:column;gap:12px;width:100%;max-width:680px;display:flex}.word-card{background-color:var(--bg-surface);border-radius:var(--radius-md);cursor:pointer;outline:2px solid #0000;flex-direction:column;gap:8px;padding:18px 24px;scroll-margin:140px 0;transition:all .2s cubic-bezier(.4,0,.2,1);display:flex;position:relative}.word-card:hover{background-color:var(--bg-surface-hover);transform:translateY(-2px)}.word-card.selected{outline:2px solid var(--primary);box-shadow:var(--shadow-glow);animation:2s ease-in-out infinite pulseBorder;transform:translateY(-2px)scale(1.01)}.word-card.unmarked{border-left:4px solid var(--color-unmarked)}.word-card.correct{border-left:4px solid var(--color-correct);background:linear-gradient(90deg, var(--bg-correct) 0%, var(--bg-surface) 100%)}.word-card.correct:hover{background:linear-gradient(90deg, var(--bg-correct) 0%, var(--bg-surface-hover) 100%)}.word-card.wrong{border-left:4px solid var(--color-wrong);background:linear-gradient(90deg, var(--bg-wrong) 0%, var(--bg-surface) 100%)}.word-card.wrong:hover{background:linear-gradient(90deg, var(--bg-wrong) 0%, var(--bg-surface-hover) 100%)}.word-card-header{justify-content:space-between;align-items:center;display:flex}.word-card-title{color:var(--text-primary);letter-spacing:-.25px;font-size:20px;font-weight:700}.word-card-badges{align-items:center;gap:8px;display:flex}.badge{border-radius:var(--radius-full);padding:3px 8px;font-size:11px;font-weight:700}.badge.group{background-color:var(--primary-glow);border:1px solid var(--primary-border);color:var(--primary)}.badge.status-correct{background-color:var(--bg-correct);border:1px solid var(--border-correct);color:var(--color-correct)}.badge.status-wrong{background-color:var(--bg-wrong);border:1px solid var(--border-wrong);color:var(--color-wrong)}.badge.status-unmarked{background-color:var(--bg-unmarked);border:1px solid var(--border-unmarked);color:var(--text-secondary)}.word-card-desc{color:var(--text-secondary);text-overflow:ellipsis;-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:14px;line-height:1.5;display:-webkit-box;overflow:hidden}.word-card-synonyms{flex-wrap:wrap;gap:6px;margin-top:4px;display:flex}.synonym-tag{color:var(--text-muted);background-color:var(--bg-app);border:1px solid var(--border-color);border-radius:var(--radius-sm);padding:1px 6px;font-size:11px}.word-card-note-indicator{color:var(--accent);align-items:center;gap:4px;margin-top:4px;font-size:11px;font-style:italic;display:inline-flex}.empty-state{color:var(--text-secondary);text-align:center;background-color:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-lg);flex-direction:column;justify-content:center;align-items:center;gap:16px;margin-top:32px;padding:64px 32px;display:flex}.empty-icon{color:var(--text-muted)}.empty-title{color:var(--text-primary);font-size:18px;font-weight:700}.modal-overlay{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:2000;background-color:#0d0e12bf;justify-content:center;align-items:center;padding:24px;display:flex;position:fixed;inset:0}.modal-content{background-color:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-lg);width:100%;max-width:640px;box-shadow:var(--shadow-lg);flex-direction:column;display:flex;overflow:hidden}.modal-header{border-bottom:1px solid var(--border-color);background-color:var(--bg-surface-hover);justify-content:space-between;align-items:center;padding:20px 24px;display:flex}.modal-header-title{align-items:center;gap:12px;display:flex}.modal-title-text{color:var(--text-primary);font-size:26px;font-weight:800}.modal-close-btn{color:var(--text-muted);border-radius:var(--radius-full);justify-content:center;align-items:center;width:32px;height:32px;display:flex}.modal-close-btn:hover{background-color:var(--border-color);color:var(--text-primary)}.modal-body{flex-direction:column;gap:20px;max-height:calc(100vh - 200px);padding:24px;display:flex;overflow-y:auto}.modal-section{flex-direction:column;gap:8px;display:flex}.modal-section-title{text-transform:uppercase;letter-spacing:1px;color:var(--text-muted);font-size:11px;font-weight:800}.modal-description{color:var(--text-primary);font-size:16px;line-height:1.6}.modal-synonyms-grid{flex-wrap:wrap;gap:8px;display:flex}.modal-synonym-tag{color:var(--text-primary);background-color:var(--bg-app);border:1px solid var(--border-color);border-radius:var(--radius-sm);padding:4px 12px;font-size:13px}.status-grid{grid-template-columns:repeat(3,1fr);gap:12px;display:grid}.status-update-btn{border-radius:var(--radius-md);border:1px solid var(--border-color);background-color:var(--bg-app);flex-direction:column;justify-content:center;align-items:center;gap:4px;padding:12px 8px;transition:all .2s;display:flex}.status-update-btn:hover{transform:translateY(-1px)}.status-update-btn.correct{color:var(--color-correct);border-color:var(--border-correct)}.status-update-btn.correct:hover{background-color:var(--bg-correct)}.status-update-btn.correct.active{background-color:var(--bg-correct);border-color:var(--color-correct);box-shadow:0 0 12px var(--glow-correct)}.status-update-btn.wrong{color:var(--color-wrong);border-color:var(--border-wrong)}.status-update-btn.wrong:hover{background-color:var(--bg-wrong)}.status-update-btn.wrong.active{background-color:var(--bg-wrong);border-color:var(--color-wrong);box-shadow:0 0 12px var(--glow-wrong)}.status-update-btn.reset{color:var(--text-secondary)}.status-update-btn.reset:hover{background-color:var(--bg-surface-hover);border-color:var(--border-color-hover)}.status-update-btn.reset.active{background-color:var(--bg-surface-active);border-color:var(--text-secondary)}.status-btn-text{font-size:14px;font-weight:700}.status-btn-shortcut{font-family:var(--mono-font);border-radius:var(--radius-sm);color:var(--text-muted);background-color:#ffffff0d;border:1px solid #ffffff1a;padding:1px 4px;font-size:10px}.note-textarea{background-color:var(--bg-app);border:1px solid var(--border-color);border-radius:var(--radius-md);width:100%;height:100px;color:var(--text-primary);resize:vertical;outline:none;padding:12px;font-size:14px;transition:all .2s}.note-textarea:focus{border-color:var(--primary);box-shadow:0 0 0 2px 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