@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap";:root{--bg-primary:#edf1f7;--bg-secondary:#dce3ee;--bg-card:#fff;--text-primary:#111827;--text-secondary:#374151;--accent:#1d4ed8;--accent-hover:#1e40af;--border:#bdc8d9;--danger:#dc2626;--danger-hover:#b91c1c;--success:#16a34a;--warning:#d97706;--shadow:0 1px 4px #0000001a, 0 1px 2px #0000000f;--shadow-lg:0 8px 24px #0000001f;--radius:.75rem;--reader-gutter:#c9d4e4}[data-theme=dark]{--bg-primary:#0d1117;--bg-secondary:#161b22;--bg-card:#1c2333;--text-primary:#e6edf3;--text-secondary:#adbac7;--accent:#4d9ef7;--accent-hover:#79b8ff;--border:#2d3748;--danger:#f85149;--danger-hover:#ff7b72;--success:#3fb950;--warning:#d29922;--shadow:0 1px 4px #0006, 0 1px 2px #0000004d;--shadow-lg:0 8px 24px #00000080;--reader-gutter:#0d1117}*,:before,:after{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-primary);color:var(--text-primary);font-family:Inter,sans-serif;line-height:1.6;transition:background-color .3s,color .3s}.full-height{min-height:60vh}.flex-center{justify-content:center;align-items:center;display:flex}.container{max-width:1200px;margin:0 auto;padding:2rem 1rem}h1,h2,h3,h4,h5,h6{color:var(--text-primary);margin-bottom:.5em;font-weight:600;line-height:1.25}a{color:var(--accent);text-decoration:none;transition:color .2s}a:hover{color:var(--accent-hover)}.card{background-color:var(--bg-card);border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--border);transition:transform .2s,box-shadow .2s}.input{background-color:var(--bg-secondary);border:1.5px solid var(--border);color:var(--text-primary);border-radius:var(--radius);outline:none;width:100%;padding:.75rem 1rem;font-family:inherit;font-size:1rem;transition:border-color .2s,box-shadow .2s}.input:focus{border-color:var(--accent);box-shadow:0 0 0 3px #1d4ed82e}.input:disabled{opacity:.55;cursor:not-allowed}button{cursor:pointer;border-radius:var(--radius);border:none;justify-content:center;align-items:center;gap:.5rem;padding:.75rem 1.5rem;font-family:inherit;font-size:1rem;font-weight:500;transition:all .18s;display:inline-flex}button:disabled{opacity:.55;cursor:not-allowed}.btn-primary{background-color:var(--accent);color:#fff}.btn-primary:hover:not(:disabled){background-color:var(--accent-hover);transform:translateY(-1px)}.btn-secondary{background-color:var(--bg-secondary);color:var(--text-primary);border:1.5px solid var(--border)}.btn-secondary:hover:not(:disabled){background-color:var(--border)}.btn-danger{background-color:var(--danger);color:#fff}.btn-danger:hover:not(:disabled){background-color:var(--danger-hover)}.btn-ghost{color:var(--text-secondary);background:0 0;padding:.5rem}.btn-ghost:hover:not(:disabled){color:var(--text-primary);background-color:var(--bg-secondary)}.navbar{background-color:var(--bg-card);border-bottom:1px solid var(--border);z-index:100;box-shadow:var(--shadow);justify-content:space-between;align-items:center;padding:1rem 2rem;display:flex;position:sticky;top:0}.navbar-links{gap:1.5rem;display:flex}.nav-link{color:var(--text-secondary);font-weight:500}.nav-link:hover,.nav-link.active{color:var(--accent)}.navbar-user{align-items:center;display:flex}.book-grid{grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:2rem;margin-top:2rem;display:grid}.book-card{cursor:pointer;flex-direction:column;display:flex;overflow:hidden}.book-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}.book-cover{aspect-ratio:2/3;background-color:var(--bg-secondary);width:100%;position:relative;overflow:hidden}.book-cover img{object-fit:cover;width:100%;height:100%;transition:transform .3s}.book-card:hover .book-cover img{transform:scale(1.05)}.book-cover-placeholder{background:linear-gradient(135deg, var(--accent), var(--accent-hover));color:#fff;justify-content:center;align-items:center;width:100%;height:100%;font-size:4rem;font-weight:700;display:flex}.book-lang-badge,.book-hidden-badge{color:#fff;box-shadow:var(--shadow);border-radius:.25rem;padding:.25rem .5rem;font-size:.75rem;font-weight:600;position:absolute;top:.5rem}.book-lang-badge{background-color:var(--accent);right:.5rem}.book-hidden-badge{background-color:var(--danger);left:.5rem}.book-info{flex-direction:column;flex:1;padding:1rem;display:flex}.book-title{white-space:nowrap;text-overflow:ellipsis;margin-bottom:.25rem;font-size:1.1rem;overflow:hidden}.book-author{color:var(--text-secondary);white-space:nowrap;text-overflow:ellipsis;margin-bottom:.5rem;font-size:.875rem;overflow:hidden}.book-uploader{color:var(--text-secondary);margin-top:auto;font-size:.75rem}.modal-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1000;background:#0000008c;justify-content:center;align-items:center;animation:.2s ease-out fadeIn;display:flex;position:fixed;inset:0}.modal{background-color:var(--bg-card);border-radius:var(--radius);width:90%;max-width:500px;max-height:90vh;box-shadow:var(--shadow-lg);border:1px solid var(--border);animation:.25s ease-out slideUp;overflow-y:auto}.modal-header{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:1.5rem;display:flex}.modal-header h3{margin:0}.modal-body{padding:1.5rem}.dict-panel{background-color:var(--bg-card);box-shadow:var(--shadow-lg);z-index:50;padding:1.5rem;overflow-y:auto}.dict-panel-content{flex-direction:column;height:100%;display:flex}.dict-word-header{flex-wrap:wrap;align-items:baseline;gap:1rem;margin-bottom:1rem;display:flex}.dict-word{color:var(--accent);margin:0;font-size:2rem}.dict-ipa{color:var(--text-secondary);font-family:monospace;font-size:1.1rem}.badge{background-color:var(--bg-secondary);color:var(--text-secondary);border:1px solid var(--border);border-radius:9999px;padding:.25rem .5rem;font-size:.75rem;font-weight:600;display:inline-block}.badge-admin{color:var(--accent);border-color:var(--accent);background-color:#1d4ed81a}.badge-flagged{color:var(--danger);border-color:var(--danger);background-color:#dc26261a}.dict-definitions{margin:1.5rem 0;padding-left:1.5rem}.dict-definitions li{color:var(--text-primary);margin-bottom:.75rem}.ai-explanation-box{border-radius:var(--radius);background-color:#1d4ed80d;border:1px solid #1d4ed833;margin-top:1.5rem;padding:1rem}.ai-section-title{text-transform:uppercase;letter-spacing:.06em;color:var(--accent);margin-top:1rem;margin-bottom:.5rem;font-size:.8rem}.ai-section-title:first-child{margin-top:0}.reader-wrapper{flex:1;min-height:0;display:flex;overflow:hidden}.reader-title-bar{border-bottom:1px solid var(--border);background:var(--bg-card);color:var(--text-primary);flex-shrink:0;justify-content:center;align-items:center;padding:.5rem 1rem;font-size:.875rem;font-weight:600;display:flex}.book-area{background:var(--bg-card);flex:1;min-width:0;height:100%;position:relative;overflow:hidden}.book-area>div:not(.flex-center),.book-area iframe{width:100%!important;height:100%!important}.reader-nav{color:var(--text-primary);cursor:pointer;z-index:10;background:#0000001f;border:none;border-radius:6px;padding:1rem .6rem;font-size:1.4rem;line-height:1;position:absolute;top:50%;transform:translateY(-50%)}.reader-nav:hover{background:#00000047}[data-theme=dark] .reader-nav{background:#ffffff1f}[data-theme=dark] .reader-nav:hover{background:#ffffff47}.reader-prev{left:4px}.reader-next{right:4px}.spinner{border:3px solid var(--bg-secondary);border-top-color:var(--accent);border-radius:50%;width:2rem;height:2rem;animation:.9s linear infinite spin}.toast-container{z-index:2000;flex-direction:column;gap:.5rem;display:flex;position:fixed;bottom:2rem;right:2rem}.toast{border-radius:var(--radius);color:#fff;box-shadow:var(--shadow-lg);cursor:pointer;word-break:break-word;max-width:350px;padding:1rem 1.5rem;animation:.3s ease-out slideInRight}.toast-success{background-color:var(--success)}.toast-error{background-color:var(--danger)}.toast-info{background-color:var(--accent)}.flashcard-container{perspective:1000px;width:100%;max-width:600px;height:400px;margin:0 auto}.flashcard{width:100%;height:100%;transform-style:preserve-3d;cursor:pointer;transition:transform .6s cubic-bezier(.4,0,.2,1);position:relative}.flashcard.flipped{transform:rotateY(180deg)}.flashcard-front,.flashcard-back{backface-visibility:hidden;border-radius:var(--radius);background-color:var(--bg-card);width:100%;height:100%;box-shadow:var(--shadow-lg);border:1px solid var(--border);flex-direction:column;padding:2rem;display:flex;position:absolute}.flashcard-front{text-align:center;justify-content:center;align-items:center}.flashcard-back{overflow-y:auto;transform:rotateY(180deg)}table{border-collapse:collapse;width:100%}th,td{text-align:left;border-bottom:1px solid var(--border);padding:1rem}th{color:var(--text-secondary);background-color:var(--bg-secondary);font-weight:600}tr:hover td{background-color:#00000006}[data-theme=dark] tr:hover td{background-color:#ffffff06}@keyframes spin{to{transform:rotate(360deg)}}@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(50px)}to{opacity:1;transform:translate(0)}}.reader-page{flex-direction:column;height:calc(100vh - 65px);display:flex}.admin-tabs{border-bottom:1px solid var(--border);gap:1rem;margin-bottom:2rem;display:flex}.admin-tab-btn{text-transform:capitalize;border-bottom:2px solid #0000;border-radius:0}.admin-tab-btn.active{border-bottom:2px solid var(--accent)}.flex-end{justify-content:flex-end;display:flex}.flex-between{justify-content:space-between;align-items:center;display:flex}.flex{display:flex}.flex-wrap{flex-wrap:wrap}.gap-2{gap:.5rem}.mb-4{margin-bottom:1rem}.mb-8{margin-bottom:2rem}.mt-4{margin-top:1rem}.m-0{margin:0}.p-8{padding:2rem}.overflow-x-auto{overflow-x:auto}.text-center{text-align:center}.font-semibold{font-weight:600}.text-sm{font-size:.875rem}.text-secondary{color:var(--text-secondary)}.text-danger{color:var(--danger)}.btn-sm{padding:.25rem .5rem;font-size:.75rem}.temp-password-box{background:var(--bg-secondary);letter-spacing:2px;border-radius:4px;padding:1rem;font-family:monospace;font-size:2rem}.text-accent{color:var(--accent)}.font-italic{font-style:italic}@media (width>=1024px){.reader-wrapper{background:var(--reader-gutter);justify-content:center;padding:0;position:relative}.book-area{background:var(--bg-primary);flex:0 0 clamp(700px,60vw,1200px);position:relative;box-shadow:0 0 48px #0000002e}.reader-nav{z-index:40;border-radius:30%;width:1.5rem;height:3rem;position:fixed;top:50%;transform:translateY(-50%);box-shadow:0 4px 12px #00000026}.reader-prev{left:calc(50vw - clamp(350px,30vw,600px) - 3rem)}.reader-next{right:calc(50vw - clamp(350px,30vw,600px) - 3rem)}.dict-panel{background:var(--bg-primary);border-left:1px solid var(--border);z-index:100;width:400px;padding:0;transition:transform .3s cubic-bezier(.4,0,.2,1);position:fixed;top:60px;bottom:0;right:0;transform:translate(100%);box-shadow:-8px 0 32px #00000026}.dict-panel.open{padding:1.5rem;overflow-y:auto;transform:translate(0)}.dict-panel-content{min-width:332px}}@media (width<=1023px){.book-area{flex:1}}@media (width<=767px){.navbar{padding:.75rem 1rem}.navbar-links{gap:.75rem}.container{padding:1rem}.dict-panel{border-left:none;border-top:1px solid var(--border);z-index:200;border-top-left-radius:1rem;border-top-right-radius:1rem;height:65vh;transition:transform .3s;position:fixed;bottom:0;left:0;right:0;transform:translateY(100%)}.dict-panel.open{transform:translateY(0)}}@media (width>=768px) and (width<=1023px){.dict-panel{border-left:none;flex-shrink:0;width:0;padding:0;transition:width .25s;position:relative;overflow:hidden}.dict-panel.open{border-left:1px solid var(--border);width:320px;padding:1.25rem;overflow-y:auto}.dict-panel-content{min-width:272px}}