@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap";
@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/2c55a0e60120577a-s.03ez25a9g3i0n.woff2)format("woff2");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/9c72aa0f40e4eef8-s.3i9rha7jpxn0q.woff2)format("woff2");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/ad66f9afd8947f86-s.2o7ko1d-5m1xu.woff2)format("woff2");unicode-range:U+1F??}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/5476f68d60460930-s.1ee5w62fj497l.woff2)format("woff2");unicode-range:U+370-377,U+37A-37F,U+384-38A,U+38C,U+38E-3A1,U+3A3-3FF}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/2bbe8d2671613f1f-s.1way2z9fj6cig.woff2)format("woff2");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/1bffadaabf893a1e-s.0szrwpqb9mkwe.woff2)format("woff2");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Inter;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/83afe278b6a6bb3c-s.p.45535valc9rzk.woff2)format("woff2");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Inter Fallback;src:local(Arial);ascent-override:90.44%;descent-override:22.52%;line-gap-override:0.0%;size-adjust:107.12%}.inter_5901b7c6-module__ec5Qua__className{font-family:Inter,Inter Fallback;font-style:normal}.inter_5901b7c6-module__ec5Qua__variable{--font-inter:"Inter", "Inter Fallback"}
*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--bg-primary:#f8fafc;--bg-secondary:#fff;--bg-card:#fff;--bg-card-hover:#f1f5f9;--border:#e2e8f0;--border-hover:#cbd5e1;--accent:#4f46e5;--accent-light:#6366f1;--accent-glow:#4f46e51f;--purple:#9333ea;--teal:#0d9488;--rose:#e11d48;--amber:#d97706;--green:#059669;--text-primary:#0f172a;--text-secondary:#475569;--text-muted:#64748b;--font:"Inter", sans-serif;--radius:16px;--radius-sm:10px;--radius-lg:24px;--shadow:0 4px 20px #0f172a0f;--shadow-glow:0 0 30px #4f46e51f}html{scroll-behavior:smooth}body{font-family:var(--font);background:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;min-height:100vh}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:#0f172a26;border-radius:3px}.app-layout{min-height:100vh;display:flex}.sidebar{background:var(--bg-secondary);border-right:1px solid var(--border);z-index:100;flex-direction:column;flex-shrink:0;width:260px;padding:24px 16px;display:flex;position:fixed;top:0;bottom:0;left:0;box-shadow:2px 0 12px #0f172a08}.main-content{flex:1;min-height:100vh;margin-left:260px;padding:32px 40px}.logo{align-items:center;gap:10px;margin-bottom:36px;padding:0 8px;display:flex}.logo-icon{background:linear-gradient(135deg, var(--accent), var(--purple));color:#fff;border-radius:10px;justify-content:center;align-items:center;width:36px;height:36px;font-size:18px;display:flex}.logo-text{color:var(--text-primary);font-size:18px;font-weight:800}.logo-text span{color:var(--accent)}.nav-section{margin-bottom:8px}.nav-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:1px;margin-top:20px;margin-bottom:6px;padding:0 12px;font-size:10px;font-weight:600}.nav-item{border-radius:var(--radius-sm);color:var(--text-secondary);cursor:pointer;border:1px solid #0000;align-items:center;gap:10px;padding:10px 12px;font-size:14px;font-weight:500;text-decoration:none;transition:all .2s;display:flex}.nav-item:hover{background:var(--bg-card-hover);color:var(--text-primary);border-color:var(--border)}.nav-item.active{background:var(--accent-glow);color:var(--accent);border-color:#4f46e533;font-weight:600}.nav-item .icon{width:18px;height:18px}.nav-badge{background:var(--rose);color:#fff;text-align:center;border-radius:20px;min-width:20px;margin-left:auto;padding:2px 7px;font-size:10px;font-weight:700}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;transition:all .25s}.card:hover{background:var(--bg-card-hover);border-color:var(--border-hover)}.card-sm{border-radius:var(--radius-sm);padding:16px}.btn{border-radius:var(--radius-sm);cursor:pointer;white-space:nowrap;border:none;align-items:center;gap:8px;padding:10px 20px;font-size:14px;font-weight:600;text-decoration:none;transition:all .2s;display:inline-flex}.btn-primary{background:linear-gradient(135deg, var(--accent), var(--purple));color:#fff;box-shadow:0 4px 15px var(--accent-glow)}.btn-primary:hover{box-shadow:0 6px 20px var(--accent-glow);transform:translateY(-1px)}.btn-secondary{background:var(--bg-card);border:1px solid var(--border);color:var(--text-primary)}.btn-secondary:hover{background:var(--bg-card-hover);border-color:var(--border-hover)}.btn-danger{color:var(--rose);background:#e11d481a;border:1px solid #e11d4840}.btn-danger:hover{background:#e11d4833}.btn-ghost{color:var(--text-secondary);background:0 0}.btn-ghost:hover{color:var(--text-primary);background:var(--bg-card-hover)}.btn-sm{padding:6px 14px;font-size:13px}.btn-lg{border-radius:var(--radius);padding:14px 28px;font-size:16px}.btn-icon{border-radius:8px;padding:8px}.btn:disabled{opacity:.4;cursor:not-allowed;transform:none!important}.input-group{flex-direction:column;gap:6px;display:flex}.input-label{color:var(--text-secondary);font-size:13px;font-weight:600}.input{border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);font-size:14px;font-family:var(--font);background:#fff;outline:none;width:100%;padding:11px 14px;transition:all .2s}.input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}.input::placeholder{color:var(--text-muted)}textarea.input{resize:vertical;min-height:80px}select.input option,option{color:#0f172a;background-color:#fff;padding:10px}.badge{white-space:nowrap;border-radius:20px;align-items:center;gap:6px;padding:4px 12px;font-size:12px;font-weight:600;line-height:1;transition:all .2s;display:inline-flex}.badge-accent{background:var(--accent-glow);color:var(--accent);border:1px solid #4f46e52e}.badge-green{color:var(--green);background:#05966914;border:1px solid #05966933}.badge-rose{color:var(--rose);background:#e11d4814;border:1px solid #e11d4833}.badge-amber{color:var(--amber);background:#d9770614;border:1px solid #d9770633}.badge-purple{color:var(--purple);background:#9333ea14;border:1px solid #9333ea33}.stat-card{border-radius:var(--radius);background:var(--bg-card);border:1px solid var(--border);box-shadow:var(--shadow);flex-direction:column;gap:8px;padding:20px;display:flex}.stat-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;font-size:12px;font-weight:600}.stat-value{color:var(--text-primary);font-size:32px;font-weight:800}.stat-change{color:var(--green);font-size:12px}.progress-bar{background:#e2e8f0;border-radius:4px;height:8px;overflow:hidden}.progress-fill{background:linear-gradient(90deg, var(--accent), var(--purple));border-radius:4px;height:100%;transition:width .5s}.modal-overlay{z-index:1000;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#0f172a66;justify-content:center;align-items:center;padding:20px;animation:.2s fadeIn;display:flex;position:fixed;inset:0}.modal{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-lg);width:100%;max-width:520px;padding:32px;animation:.3s slideUp;box-shadow:0 20px 40px #0f172a1f}.modal-header{justify-content:space-between;align-items:center;margin-bottom:24px;display:flex}.modal-title{font-size:20px;font-weight:700}.flashcard-scene{perspective:1000px;width:100%}.flashcard{border-radius:var(--radius-lg);width:100%;min-height:320px;transform-style:preserve-3d;cursor:pointer;transition:transform .6s cubic-bezier(.4,0,.2,1);position:relative}.flashcard.flipped{transform:rotateY(180deg)}.flashcard-face{backface-visibility:hidden;border-radius:var(--radius-lg);text-align:center;flex-direction:column;justify-content:center;align-items:center;padding:40px;display:flex;position:absolute;inset:0}.flashcard-front{background:linear-gradient(135deg,#eef2ff,#f3e8ff);border:1px solid #4f46e533;box-shadow:0 10px 30px #4f46e514}.flashcard-back{background:linear-gradient(135deg,#f0fdf4,#e0e7ff);border:1px solid #0d948840;transform:rotateY(180deg);box-shadow:0 10px 30px #0d948814}.flashcard-term{color:#1e1b4b;margin-bottom:12px;font-size:42px;font-weight:800}.flashcard-phonetic{color:var(--text-muted);margin-bottom:8px;font-size:18px}.flashcard-pos{color:var(--purple);font-size:13px;font-style:italic}.flashcard-definition{color:var(--text-primary);font-size:22px;font-weight:600;line-height:1.5}.flashcard-example{color:var(--text-secondary);margin-top:16px;font-size:14px;font-style:italic}.flashcard-hint{color:var(--text-muted);margin-top:20px;font-size:13px}.rating-buttons{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}.rating-btn{border-radius:var(--radius-sm);cursor:pointer;border:1px solid;flex-direction:column;flex:1;align-items:center;gap:4px;min-width:100px;padding:12px 16px;font-size:13px;font-weight:700;transition:all .2s;display:flex}.rating-btn:hover{transform:translateY(-2px)}.rating-btn .days{opacity:.8;font-size:11px;font-weight:400}.rating-again{color:var(--rose);background:#e11d4814;border-color:#e11d484d}.rating-hard{color:var(--amber);background:#d9770614;border-color:#d977064d}.rating-good{color:var(--accent);background:#4f46e514;border-color:#4f46e54d}.rating-easy{color:var(--green);background:#05966914;border-color:#0596694d}.quiz-option{border-radius:var(--radius-sm);background:var(--bg-card);border:1px solid var(--border);width:100%;color:var(--text-primary);cursor:pointer;text-align:left;padding:16px 20px;font-size:15px;font-weight:500;transition:all .2s;box-shadow:0 2px 8px #0f172a08}.quiz-option:hover:not(:disabled){background:var(--bg-card-hover);border-color:var(--accent)}.quiz-option.correct{border-color:var(--green);color:var(--green);background:#0596691a;font-weight:600}.quiz-option.wrong{border-color:var(--rose);color:var(--rose);background:#e11d481a;font-weight:600}.quiz-option:disabled{cursor:not-allowed}.page-header{margin-bottom:32px}.page-title{color:var(--text-primary);font-size:28px;font-weight:800}.page-subtitle{color:var(--text-secondary);margin-top:4px;font-size:14px}.grid-2{grid-template-columns:repeat(2,1fr);gap:20px;display:grid}.grid-3{grid-template-columns:repeat(3,1fr);gap:20px;display:grid}.grid-4{grid-template-columns:repeat(4,1fr);gap:16px;display:grid}@media (max-width:1200px){.grid-4{grid-template-columns:repeat(2,1fr)}}@media (max-width:900px){.grid-3,.grid-2{grid-template-columns:1fr}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}.animate-fade{animation:.4s both fadeIn}.animate-up{animation:.4s both slideUp}.animate-pulse{animation:2s infinite pulse}.animate-spin{animation:1s linear infinite spin}.skeleton{background:linear-gradient(90deg,#0000000a 25%,#00000014 50%,#0000000a 75%) 0 0/200% 100%;border-radius:8px;animation:1.5s infinite shimmer}.deck-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);cursor:pointer;color:inherit;box-shadow:var(--shadow);flex-direction:column;gap:12px;padding:24px;text-decoration:none;transition:all .25s;display:flex;position:relative;overflow:hidden}.deck-card:before{content:"";background:linear-gradient(90deg, var(--accent), var(--purple));opacity:0;height:4px;transition:opacity .25s;position:absolute;top:0;left:0;right:0}.deck-card:hover{border-color:var(--border-hover);transform:translateY(-3px);box-shadow:0 10px 30px #0f172a14}.deck-card:hover:before{opacity:1}.deck-card-name{color:var(--text-primary);font-size:17px;font-weight:700}.deck-card-desc{color:var(--text-secondary);font-size:13px;line-height:1.5}.deck-card-meta{align-items:center;gap:12px;display:flex}.review-deck-card{border-radius:var(--radius);cursor:pointer;color:inherit;background:linear-gradient(135deg,#fff1f2f2,#fee2e2a6);border:1.5px solid #e11d4847;flex-direction:column;justify-content:space-between;padding:24px;text-decoration:none;transition:transform .3s cubic-bezier(.34,1.56,.64,1),box-shadow .3s,border-color .3s,background .3s;display:flex;position:relative;overflow:hidden;box-shadow:0 4px 14px #e11d4814}[data-theme=dark] .review-deck-card{background:linear-gradient(135deg,#e11d481f,#9f123914);border-color:#e11d4859}.review-deck-card:before{content:"";opacity:.85;background:linear-gradient(90deg,#e11d48,#f43f5e);height:4px;transition:opacity .25s;position:absolute;top:0;left:0;right:0}.review-deck-card:hover{background:linear-gradient(135deg,#ffe4e6,#fecdd3d9);border-color:#e11d48b3;transform:translateY(-8px)scale(1.02);box-shadow:0 20px 35px -8px #e11d4847,0 0 15px #e11d481f}.review-deck-card:hover .badge{transform:scale(1.05);box-shadow:0 4px 12px #e11d4859}.review-deck-card:hover .card-icon-box{transform:rotate(-6deg)scale(1.1)}.review-deck-card:active{transform:translateY(-2px)scale(.99);box-shadow:0 8px 18px -4px #e11d4833}[data-theme=dark] .review-deck-card:hover{background:linear-gradient(135deg,#e11d4838,#9f12392e)}.empty-state{text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:16px;padding:80px 20px;display:flex}.empty-icon{opacity:.6;font-size:56px}.empty-title{color:var(--text-primary);font-size:20px;font-weight:700}.empty-desc{color:var(--text-secondary);max-width:340px;font-size:14px}.toast{z-index:9999;border-radius:var(--radius-sm);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);align-items:center;gap:10px;padding:14px 20px;font-size:14px;font-weight:600;animation:.3s slideUp;display:flex;position:fixed;bottom:24px;right:24px;box-shadow:0 10px 30px #0f172a1f}.toast-success{color:var(--green);background:#ecfdf5;border:1px solid #a7f3d0}.toast-error{color:var(--rose);background:#fff1f2;border:1px solid #fecdd3}.divider{background:var(--border);height:1px;margin:24px 0}.tag{border:1px solid var(--border);color:var(--text-secondary);white-space:nowrap;background:#f1f5f9;border-radius:20px;align-items:center;gap:6px;padding:4px 12px;font-size:12px;font-weight:600;line-height:1;display:inline-flex}.mobile-header,.mobile-close-btn{display:none}@media (max-width:768px){.mobile-header{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);z-index:100;background:#fffffff2;justify-content:space-between;align-items:center;height:60px;padding:0 16px;display:flex;position:fixed;top:0;left:0;right:0;box-shadow:0 2px 10px #0f172a0d}.mobile-close-btn{display:inline-flex!important}.sidebar-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:150;opacity:0;pointer-events:none;background:#0f172a66;transition:opacity .3s;position:fixed;inset:0}.sidebar-overlay.active{opacity:1;pointer-events:auto}.sidebar{z-index:160;width:280px;transition:transform .3s cubic-bezier(.4,0,.2,1);position:fixed;top:0;bottom:0;left:0;transform:translate(-100%);box-shadow:10px 0 30px #0f172a26}.sidebar.open{transform:translate(0)}.main-content{width:100%;min-height:100vh;overflow-x:hidden;margin-left:0!important;padding:80px 16px 32px!important}.grid-4{grid-template-columns:repeat(2,1fr)!important}.grid-3,.grid-2{grid-template-columns:1fr!important}.page-header{flex-direction:column;gap:12px;align-items:flex-start!important}.flashcard-scene{height:280px!important}}@media (max-width:480px){.grid-4{grid-template-columns:1fr!important}.main-content{padding:76px 12px 24px!important}.card{padding:16px!important}.stat-value{font-size:24px!important}}