@import"https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap";:root{--bg-primary: #0b0f19;--bg-secondary: #111827;--bg-sidebar: #0f172a;--bg-card: rgba(22, 31, 48, .6);--bg-card-hover: rgba(30, 41, 59, .7);--border-color: rgba(51, 65, 85, .4);--border-hover: rgba(20, 184, 166, .4);--text-primary: #e2e8f0;--text-secondary: #94a3b8;--text-muted: #64748b;--accent-teal: #14b8a6;--accent-teal-hover: #0d9488;--accent-teal-glow: rgba(20, 184, 166, .15);--accent-orange: #f59e0b;--accent-orange-glow: rgba(245, 158, 11, .15);--accent-purple: #8b5cf6;--accent-purple-glow: rgba(139, 92, 246, .15);--accent-emerald: #10b981;--accent-emerald-glow: rgba(16, 185, 129, .15);--accent-rose: #ef4444;--accent-rose-glow: rgba(239, 68, 68, .15);--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .3), 0 4px 6px -2px rgba(0, 0, 0, .1);--shadow-glow: 0 0 20px rgba(20, 184, 166, .2);--glass-blur: blur(12px);--transition-speed: .3s}[data-theme=light]{--bg-primary: #f8fafc;--bg-secondary: #f1f5f9;--bg-sidebar: #ffffff;--bg-card: rgba(255, 255, 255, .7);--bg-card-hover: rgba(255, 255, 255, .95);--border-color: rgba(226, 232, 240, .8);--border-hover: rgba(20, 184, 166, .4);--text-primary: #0f172a;--text-secondary: #475569;--text-muted: #94a3b8;--accent-teal: #0d9488;--accent-teal-hover: #14b8a6;--accent-teal-glow: rgba(13, 148, 136, .1);--accent-orange: #d97706;--accent-orange-glow: rgba(217, 119, 6, .1);--accent-purple: #7c3aed;--accent-purple-glow: rgba(124, 58, 237, .1);--accent-emerald: #059669;--accent-emerald-glow: rgba(5, 150, 105, .1);--accent-rose: #dc2626;--accent-rose-glow: rgba(220, 38, 38, .1);--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .05), 0 2px 4px -1px rgba(0, 0, 0, .03);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .08), 0 4px 6px -2px rgba(0, 0, 0, .03);--shadow-glow: 0 0 20px rgba(13, 148, 136, .1)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:Outfit,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg-primary);color:var(--text-primary);transition:background-color var(--transition-speed) ease,color var(--transition-speed) ease;min-height:100vh;overflow-x:hidden}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--accent-teal)}.app-container{display:grid;grid-template-columns:260px 1fr;min-height:100vh}.sidebar{background-color:var(--bg-sidebar);border-right:1px solid var(--border-color);padding:2rem 1.5rem;display:flex;flex-direction:column;justify-content:space-between;position:sticky;top:0;height:100vh;z-index:10;transition:background-color var(--transition-speed) ease,border-color var(--transition-speed) ease}.brand{display:flex;align-items:center;gap:.75rem;font-size:1.25rem;font-weight:700;color:var(--text-primary);margin-bottom:2.5rem;text-decoration:none}.brand-icon{background:linear-gradient(135deg,var(--accent-teal),var(--accent-purple));width:36px;height:36px;border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;box-shadow:var(--shadow-glow)}.nav-menu{list-style:none;display:flex;flex-direction:column;gap:.5rem;flex-grow:1}.nav-item{width:100%}.nav-link{display:flex;align-items:center;gap:1rem;padding:.85rem 1rem;color:var(--text-secondary);text-decoration:none;border-radius:12px;font-weight:500;transition:all var(--transition-speed) ease;border:1px solid transparent}.nav-link:hover{color:var(--text-primary);background-color:var(--bg-card);border-color:var(--border-color)}.nav-link.active{color:#fff;background:linear-gradient(135deg,var(--accent-teal),var(--accent-teal-hover));box-shadow:var(--shadow-glow);border-color:transparent}.nav-icon{font-size:1.25rem}.sidebar-footer{display:flex;flex-direction:column;gap:1rem;margin-top:auto}.theme-toggle-btn{display:flex;align-items:center;justify-content:center;gap:.75rem;padding:.75rem;border-radius:12px;border:1px solid var(--border-color);background:var(--bg-card);color:var(--text-primary);cursor:pointer;font-weight:500;font-family:inherit;transition:all var(--transition-speed) ease}.theme-toggle-btn:hover{border-color:var(--accent-teal);box-shadow:0 0 10px var(--accent-teal-glow)}.main-content{padding:2.5rem;background-color:var(--bg-primary);min-height:100vh;display:flex;flex-direction:column;overflow-y:auto}.page-container{max-width:1200px;width:100%;margin:0 auto;display:flex;flex-direction:column;gap:2rem;animation:fadeIn .4s ease-out}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.card{background:var(--bg-card);backdrop-filter:var(--glass-blur);-webkit-backdrop-filter:var(--glass-blur);border:1px solid var(--border-color);border-radius:20px;padding:1.5rem;box-shadow:var(--shadow-md);transition:all var(--transition-speed) ease}.card:hover{border-color:var(--border-hover);box-shadow:var(--shadow-lg);transform:translateY(-2px)}.card-hero{background:linear-gradient(135deg,#14b8a626,#8b5cf61a),var(--bg-card);border:1px solid rgba(20,184,166,.3);position:relative;overflow:hidden}.card-hero:before{content:"";position:absolute;top:-50%;right:-20%;width:250px;height:250px;border-radius:50%;background:radial-gradient(circle,rgba(20,184,166,.2) 0%,transparent 70%);filter:blur(20px);pointer-events:none}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.75rem 1.5rem;border-radius:12px;font-size:.95rem;font-weight:600;cursor:pointer;border:1px solid transparent;transition:all .2s ease;font-family:inherit;text-decoration:none}.btn-primary{background:linear-gradient(135deg,var(--accent-teal),var(--accent-teal-hover));color:#fff;box-shadow:var(--shadow-glow)}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 0 25px #14b8a659}.btn-primary:active{transform:translateY(1px)}.btn-secondary{background:var(--bg-card);border:1px solid var(--border-color);color:var(--text-primary)}.btn-secondary:hover{background:var(--bg-card-hover);border-color:var(--text-secondary)}.btn-icon{width:42px;height:42px;padding:0;border-radius:50%}.badge{display:inline-flex;align-items:center;padding:.25rem .75rem;border-radius:9999px;font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em}.badge-teal{background-color:var(--accent-teal-glow);color:var(--accent-teal);border:1px solid rgba(20,184,166,.2)}.badge-purple{background-color:var(--accent-purple-glow);color:var(--accent-purple);border:1px solid rgba(139,92,246,.2)}.badge-orange{background-color:var(--accent-orange-glow);color:var(--accent-orange);border:1px solid rgba(245,158,11,.2)}.tag{display:inline-flex;align-items:center;gap:.35rem;padding:.35rem .75rem;background:var(--bg-card);border:1px solid var(--border-color);color:var(--text-secondary);border-radius:8px;font-size:.85rem;font-weight:500}.progress-container{display:flex;flex-direction:column;gap:.5rem;width:100%}.progress-header{display:flex;justify-content:space-between;font-size:.85rem;font-weight:500}.progress-bar-wrapper{height:8px;width:100%;background-color:var(--bg-secondary);border-radius:9999px;overflow:hidden;border:1px solid var(--border-color)}.progress-bar{height:100%;border-radius:9999px;transition:width .6s cubic-bezier(.4,0,.2,1)}.input{width:100%;padding:.75rem 1rem;background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:12px;color:var(--text-primary);font-family:inherit;font-size:.95rem;transition:all var(--transition-speed) ease}.input:focus{outline:none;border-color:var(--accent-teal);box-shadow:0 0 10px var(--accent-teal-glow)}.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:1.5rem}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem}.dashboard-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.user-welcome h1{font-size:2rem;font-weight:700;background:linear-gradient(135deg,var(--text-primary),var(--text-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent}.user-welcome p{color:var(--text-secondary);font-size:1rem;margin-top:.25rem}@media (max-width: 1024px){.grid-4{grid-template-columns:repeat(2,1fr)}}.mobile-top-bar{display:none}@media (max-width: 820px){.app-container{display:flex!important;flex-direction:column!important;grid-template-columns:1fr!important;min-height:100vh!important;padding-bottom:calc(72px + env(safe-area-inset-bottom,0px))!important}.mobile-top-bar{display:flex!important;justify-content:space-between!important;align-items:center!important;position:sticky!important;top:0!important;left:0!important;width:100%!important;height:54px!important;padding:.4rem 1rem!important;background-color:var(--bg-sidebar)!important;border-bottom:1px solid var(--border-color)!important;box-shadow:0 2px 10px #00000040!important;z-index:900!important;backdrop-filter:blur(16px)!important;-webkit-backdrop-filter:blur(16px)!important}.mobile-brand{display:flex;align-items:center;gap:.5rem;text-decoration:none;color:var(--text-primary)}.mobile-brand-title{font-weight:700;font-size:1.05rem;background:linear-gradient(135deg,var(--text-primary) 30%,var(--accent-teal) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.mobile-top-actions{display:flex;align-items:center;gap:.5rem}.mobile-cloud-btn{padding:.3rem .65rem!important;border-radius:10px!important;font-size:.82rem!important;height:34px!important;display:inline-flex!important;align-items:center!important;gap:.35rem!important;background:var(--bg-card)!important;border:1px solid var(--border-color)!important;color:var(--text-primary)!important}.mobile-theme-btn{padding:0!important;width:34px!important;height:34px!important;border-radius:10px!important;font-size:.9rem!important;display:inline-flex!important;align-items:center!important;justify-content:center!important;background:var(--bg-card)!important;border:1px solid var(--border-color)!important;color:var(--text-primary)!important;cursor:pointer!important}.sidebar{position:fixed!important;top:auto!important;bottom:0!important;left:0!important;right:0!important;width:100vw!important;max-width:100vw!important;height:calc(64px + env(safe-area-inset-bottom,0px))!important;flex-direction:row!important;padding:.35rem .5rem calc(.35rem + env(safe-area-inset-bottom,0px))!important;border-right:none!important;border-top:1px solid var(--border-color)!important;box-shadow:0 -4px 20px #0006!important;justify-content:flex-start!important;align-items:center!important;background-color:var(--bg-sidebar)!important;backdrop-filter:blur(20px)!important;-webkit-backdrop-filter:blur(20px)!important;z-index:9999!important;overflow-x:auto!important;overflow-y:hidden!important;scrollbar-width:none!important;-webkit-overflow-scrolling:touch!important}.sidebar::-webkit-scrollbar{display:none!important}.sidebar .brand,.sidebar .sidebar-footer{display:none!important}.sidebar>div:first-child,.sidebar nav{width:100%!important;margin:0!important;padding:0!important;display:flex!important;align-items:center!important}.nav-menu{flex-direction:row!important;width:max-content!important;min-width:100%!important;justify-content:flex-start!important;align-items:center!important;gap:.25rem!important;padding:0 .5rem!important;margin:0!important;list-style:none!important}.nav-item{flex-shrink:0!important;width:auto!important}.nav-link{display:flex!important;flex-direction:column!important;align-items:center!important;justify-content:center!important;width:62px!important;min-width:62px!important;max-width:68px!important;height:52px!important;padding:.25rem .15rem!important;gap:.15rem!important;border-radius:12px!important;text-align:center!important;white-space:nowrap!important;text-decoration:none!important;color:var(--text-secondary)!important;border:1px solid transparent!important;background:transparent!important;box-shadow:none!important;transition:all .2s cubic-bezier(.4,0,.2,1)!important}.nav-icon{font-size:1.25rem!important;line-height:1!important}.nav-label{font-size:.65rem!important;font-weight:600!important;line-height:1.1!important;white-space:nowrap!important;letter-spacing:-.01em!important;display:block!important}.nav-link:hover{color:var(--text-primary)!important;background-color:#ffffff0d!important}.nav-link.active{color:#fff!important;background:linear-gradient(135deg,var(--accent-teal),var(--accent-teal-hover))!important;border-color:transparent!important;box-shadow:0 2px 12px var(--accent-teal-glow)!important;transform:scale(1.04)!important}.main-content{padding:1.25rem 1rem 2rem!important;overflow-x:hidden!important}.grid-2,.grid-3,.grid-4{grid-template-columns:1fr!important}.dashboard-header{flex-direction:column!important;align-items:flex-start!important;gap:1rem!important}}.toast{position:fixed;bottom:80px;right:20px;background:var(--bg-card);-webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);border:1px solid var(--accent-teal);color:var(--text-primary);padding:.75rem 1.25rem;border-radius:12px;box-shadow:var(--shadow-lg);z-index:1000;display:flex;align-items:center;gap:.5rem;font-weight:500;animation:slideIn .3s ease-out}@keyframes slideIn{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.assembly-target{transition:all .2s ease;min-height:80px}.assembly-target:hover{border-color:var(--accent-teal)}.word-chip{font-family:inherit;transition:all .2s cubic-bezier(.4,0,.2,1);transform-origin:center;-webkit-user-select:none;user-select:none}.word-chip:hover{transform:scale(1.05);box-shadow:var(--shadow-md)}.word-chip:active{transform:scale(.95)}.active-chip{background:linear-gradient(135deg,var(--accent-teal),var(--accent-teal-hover))}.pool-chip{background:var(--bg-secondary);border:1px solid var(--border-color);color:var(--text-primary)}.pool-chip:hover{background:var(--bg-card-hover);border-color:var(--text-secondary)}.cluster-web-container{box-shadow:inset 0 0 20px #0000001a;border:1px dashed var(--border-color)}.cluster-hub{box-shadow:var(--shadow-md);border:2px solid var(--border-color);background:var(--bg-card)}.cluster-satellite{padding:.5rem 1rem;border-radius:16px;background:var(--bg-card);border:1px solid var(--border-color);color:var(--text-primary);font-weight:600;font-family:inherit;font-size:.95rem;cursor:pointer;transition:all .2s cubic-bezier(.4,0,.2,1);box-shadow:var(--shadow-sm);z-index:3}.cluster-satellite:hover{border-color:var(--accent-teal);box-shadow:0 0 12px var(--accent-teal-glow);transform:translate(-50%,-50%) scale(1.08)}.cluster-satellite.selected{background:linear-gradient(135deg,var(--accent-teal),var(--accent-teal-hover))!important;color:#fff!important;border-color:transparent!important;box-shadow:0 0 15px var(--accent-teal-glow)!important;transform:translate(-50%,-50%) scale(1.05)}.article-btn{transition:all .2s cubic-bezier(.4,0,.2,1);font-family:inherit}.article-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.article-btn.selected[data-article=de]{background:linear-gradient(135deg,var(--accent-teal),var(--accent-teal-hover))!important;color:#fff!important;border-color:transparent!important;box-shadow:0 0 15px var(--accent-teal-glow)!important}.article-btn.selected[data-article=het]{background:linear-gradient(135deg,var(--accent-purple),var(--accent-purple-hover))!important;color:#fff!important;border-color:transparent!important;box-shadow:0 0 15px var(--accent-purple-glow)!important}.practice-mode-card:hover,.practice-mode-card#mode-class-btn:hover{border-color:var(--accent-teal);box-shadow:0 0 15px var(--accent-teal-glow)}.practice-mode-card#mode-sentence-btn:hover{border-color:var(--accent-purple);box-shadow:0 0 15px var(--accent-purple-glow)}.practice-mode-card#mode-speed-btn:hover{border-color:var(--accent-orange);box-shadow:0 0 15px var(--accent-orange-glow)}@keyframes pulse{0%{transform:scale(1)}to{transform:scale(1.05)}}.explorer-word-card{background:var(--bg-card);border:1px solid var(--border-color);transition:all .25s cubic-bezier(.4,0,.2,1)}.explorer-word-card:hover{border-color:var(--accent-teal);box-shadow:0 10px 25px var(--accent-teal-glow);transform:translateY(-4px)}.card-tts-btn{transition:all .2s ease}.card-tts-btn:hover{background-color:var(--accent-teal-glow);border-color:var(--accent-teal);transform:scale(1.1)}.sentence-row{animation:fadeIn .2s ease-out}@keyframes slideInRight{0%{transform:translate(120%);opacity:0}to{transform:translate(0);opacity:1}}@keyframes slideOutRight{0%{transform:translate(0);opacity:1}to{transform:translate(120%);opacity:0}}@keyframes scalePulse{0%{transform:scale(1)}50%{transform:scale(1.08)}to{transform:scale(1)}}@keyframes firePulse{0%{transform:scale(1) rotate(-2deg);filter:drop-shadow(0 0 15px rgba(245,158,11,.5))}to{transform:scale(1.1) rotate(2deg);filter:drop-shadow(0 0 25px rgba(245,158,11,.8))}}@keyframes pulseGlow{0%{border-color:#14b8a666;box-shadow:0 0 10px #14b8a61a}50%{border-color:#14b8a6cc;box-shadow:0 0 20px #14b8a64d}to{border-color:#14b8a666;box-shadow:0 0 10px #14b8a61a}}@keyframes fadeOut{0%{opacity:1}to{opacity:0}}.badge-toast-close:hover{color:#fff!important}.page-loading-container{padding:4rem 2rem;text-align:center;color:var(--text-secondary);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1rem}.spinner{width:48px;height:48px;border:4px solid var(--border-color);border-top-color:var(--accent-teal);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.page-header-row{display:flex;justify-content:space-between;align-items:flex-start;border-bottom:1px solid var(--border-color);padding-bottom:1.5rem;gap:1.5rem;flex-wrap:wrap}.welcome-info{flex-grow:1}.welcome-info h1{font-size:2rem;font-weight:800;background:linear-gradient(135deg,var(--text-primary) 30%,var(--text-secondary) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:.25rem}.welcome-info p{color:var(--text-secondary);font-size:1rem}.header-date-badge{display:flex;align-items:center;gap:.5rem;font-size:.9rem;color:var(--text-secondary);margin-top:.5rem}.header-level-badge{background:var(--bg-card);border:1px solid var(--border-color);padding:.5rem 1rem;border-radius:12px;display:flex;align-items:center;gap:.75rem}.header-level-badge-icon{font-size:1.5rem}.header-level-badge-text{text-align:left}.header-level-badge-title{font-size:.75rem;color:var(--text-muted);text-transform:uppercase;font-weight:700;letter-spacing:.05em;line-height:1}.header-level-badge-value{font-size:.95rem;font-weight:600;color:var(--text-primary);margin-top:.15rem}.level-progress-wrapper{margin-top:.5rem;display:flex;align-items:center;gap:.75rem;max-width:500px}.level-progress-label{font-size:.85rem;font-weight:600;color:var(--accent-purple);min-width:120px}.level-progress-bar-bg{flex-grow:1;height:8px;background:#8b5cf626;border-radius:4px;overflow:hidden;position:relative}.level-progress-bar-fill{height:100%;background:linear-gradient(90deg,var(--accent-purple),var(--accent-teal));border-radius:4px}.level-progress-value{font-size:.75rem;color:var(--text-secondary);min-width:80px;text-align:right}.stat-card-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1.25rem;width:100%}.stat-card{display:flex;align-items:center;gap:1rem;min-height:90px}.stat-card-icon{font-size:2.25rem;background:var(--bg-secondary);width:60px;height:60px;border-radius:16px;display:flex;align-items:center;justify-content:center;box-shadow:inset 0 0 10px 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ease}.deck-item-row:hover{border-color:var(--accent-purple);background:#8b5cf614}.deck-item-info{display:flex;align-items:center;gap:.6rem}.deck-item-icon{font-size:1.2rem}.deck-item-name{font-size:.95rem;font-weight:600;color:var(--text-primary)}.deck-item-count{font-size:.75rem;color:var(--text-muted)}.deck-item-check{width:20px;height:20px;accent-color:var(--accent-purple);cursor:pointer}.deck-inline-create{display:flex;gap:.5rem;border-top:1px solid var(--border-color);padding-top:1rem}.deck-inline-input{flex-grow:1;padding:.6rem .85rem;border-radius:10px;border:1px solid var(--border-color);background:var(--bg-secondary);color:var(--text-primary);font-size:.9rem}.deck-inline-input:focus{outline:none;border-color:var(--accent-purple)}.deck-inline-submit{padding:.6rem 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var(--border-color)}.deck-card-name{font-size:1.05rem;font-weight:700;color:var(--text-primary);margin:0}.deck-card-desc{font-size:.8rem;color:var(--text-secondary);margin:.2rem 0 0}.deck-card-actions{display:flex;gap:.5rem;margin-top:auto}.deck-card-btn{flex:1;padding:.5rem;border-radius:8px;font-size:.8rem;font-weight:600;display:flex;align-items:center;justify-content:center;gap:.35rem;cursor:pointer;text-decoration:none}.btn-deck-add-words-quick{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:6px;background:#14b8a626;border:1px solid rgba(20,184,166,.35);color:var(--accent-teal);font-size:.72rem;font-weight:700;cursor:pointer;transition:all .2s ease;flex-shrink:0}.btn-deck-add-words-quick:hover{background:var(--accent-teal);color:#fff;transform:scale(1.1);box-shadow:0 0 10px 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