*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--blue:#2563eb;--blue-dark:#1d4ed8;--blue-bg:#eff6ff;--s900:#0f172a;--s700:#334155;--s600:#475569;--s500:#64748b;--s300:#cbd5e1;--s200:#e2e8f0;--s100:#f1f5f9;--s50:#f8fafc;--white:#fff;--sidebar:220px;--r:10px}
html,body{height:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;background:var(--s100);color:var(--s900);display:flex}
.sidebar{width:var(--sidebar);min-height:100vh;background:var(--s900);display:flex;flex-direction:column;position:fixed;top:0;left:0;padding-bottom:1.5rem}
.sidebar-logo{display:flex;align-items:center;gap:.6rem;padding:1.4rem 1.25rem 1.2rem;border-bottom:1px solid rgba(255,255,255,.07)}
.logo-icon{font-size:1.4rem}.logo-text{font-size:1rem;font-weight:700;color:#fff}
.sidebar-nav{flex:1;padding:1rem .75rem;display:flex;flex-direction:column;gap:.25rem}
.nav-item{display:flex;align-items:center;gap:.6rem;padding:.65rem .85rem;border-radius:8px;color:rgba(255,255,255,.5);font-size:.875rem;cursor:pointer;user-select:none;transition:background .15s,color .15s}
.nav-item:hover{background:rgba(255,255,255,.07);color:rgba(255,255,255,.85)}
.nav-item.active{background:var(--blue);color:#fff}
.nav-item.done{color:rgba(255,255,255,.7)}
.nav-item.done::after{content:"✓";margin-left:auto;color:#4ade80;font-size:.8rem}
.sidebar-footer{padding:1rem 1.25rem 0;border-top:1px solid rgba(255,255,255,.07);font-size:.75rem;color:rgba(255,255,255,.3)}
.style-pill{display:inline-block;background:rgba(37,99,235,.35);color:#93c5fd;border-radius:999px;padding:.2rem .7rem;font-size:.72rem;font-weight:600;margin-bottom:.35rem}
.main{margin-left:var(--sidebar);flex:1;padding:2.5rem 2.5rem 4rem;max-width:calc(100vw - var(--sidebar))}
.page{display:none}.page.active{display:block}
.page-header{margin-bottom:2rem}
.page-header h1{font-size:1.6rem;font-weight:700}
.page-header p{margin-top:.3rem;color:var(--s500);font-size:.95rem}
.format-cards{display:grid;grid-template-columns:1fr 1fr;gap:.75rem;max-width:560px;margin-bottom:1.5rem}
.fmt-card{display:flex;gap:.85rem;align-items:flex-start;padding:1rem 1.1rem;background:var(--white);border:1.5px solid var(--s200);border-radius:var(--r)}
.fmt-card.rec{border-color:#93c5fd;background:var(--blue-bg)}
.fmt-icon{font-size:1.75rem;flex-shrink:0}
.fmt-body strong{display:block;font-size:.875rem;color:var(--s900);margin-bottom:.25rem}
.fmt-body p{font-size:.75rem;color:var(--s500);line-height:1.45}
.rec-badge{display:inline-block;background:var(--blue);color:#fff;font-size:.6rem;font-weight:700;padding:.1rem .45rem;border-radius:999px;margin-left:.3rem;vertical-align:middle}
.drop-zone{max-width:520px;border:2px dashed var(--s300);border-radius:var(--r);padding:3rem 2rem;text-align:center;background:var(--white);cursor:pointer;transition:border-color .2s,background .2s}
.drop-zone:hover,.drop-zone.over{border-color:var(--blue);background:var(--blue-bg)}
.drop-icon{font-size:2.5rem;margin-bottom:.75rem}
.drop-title{font-size:1rem;color:var(--s700);margin-bottom:.25rem}
.drop-sub{color:var(--s500);font-size:.85rem;margin-bottom:1rem}
.upload-status{max-width:520px;margin-top:.75rem;padding:.75rem 1rem;border-radius:8px;font-size:.875rem;display:none}
.upload-status.success{background:#dcfce7;color:#15803d;display:block}
.upload-status.error{background:#fee2e2;color:#b91c1c;display:block}
.upload-status.loading{background:var(--blue-bg);color:var(--blue);display:block}
.style-row{display:flex;gap:.5rem;margin:1.25rem 0 1.5rem;max-width:520px}
.style-btn{flex:1;padding:.6rem .5rem;border:1.5px solid var(--s200);border-radius:8px;background:var(--white);cursor:pointer;font-size:.8rem;font-weight:600;color:var(--s600);transition:all .12s}
.style-btn:hover,.style-btn.active{border-color:var(--blue);background:var(--blue-bg);color:var(--blue)}
.style-btn small{display:block;font-weight:400;color:var(--s500);font-size:.7rem;margin-top:.15rem}
.report-toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;flex-wrap:wrap;gap:.5rem}
.report-toolbar h2{font-size:1.1rem;font-weight:600;color:var(--s700)}
#reportOutput{max-width:820px;background:var(--white);border:1px solid var(--s200);border-radius:var(--r);padding:3rem 3.5rem;box-shadow:0 2px 12px rgba(0,0,0,.06);line-height:1.7}
#reportOutput.apa{font-family:"Times New Roman",Times,serif;font-size:13px}
#reportOutput.academic{font-family:Arial,sans-serif;font-size:12px}
#reportOutput.business{font-family:Calibri,"Segoe UI",sans-serif;font-size:12px}
.report-title{text-align:center;font-size:1.3rem;font-weight:700;margin-bottom:.25rem}
.report-date{text-align:center;font-style:italic;color:var(--s500);font-size:.875rem;margin-bottom:2.5rem}
.section-heading{font-size:1.05rem;font-weight:700;margin:2rem 0 .75rem;padding-bottom:.3rem;border-bottom:2px solid var(--s200)}
.section-source{font-size:.78rem;color:var(--s500);font-style:italic;margin-bottom:.5rem}
.report-table-wrap{overflow-x:auto;margin:.75rem 0 1rem}
.report-table{width:100%;border-collapse:collapse;font-size:.82rem}
.report-table th{background:var(--s100);padding:.45rem .75rem;border:1px solid var(--s300);text-align:left;font-weight:700;color:var(--s700);white-space:nowrap}
.report-table td{padding:.4rem .75rem;border:1px solid var(--s200);color:var(--s900)}
.report-table tr:nth-child(even) td{background:var(--s50)}
.footnote{font-size:.75rem;color:var(--s500);font-style:italic;margin-top:.25rem;margin-bottom:1rem}
.intro-text{margin-bottom:.75rem;font-size:.875rem;color:var(--s700)}
.btn{display:inline-flex;align-items:center;gap:.4rem;padding:.6rem 1.3rem;border-radius:8px;font-size:.875rem;font-weight:600;cursor:pointer;border:none;text-decoration:none;transition:background .15s}
.btn.primary{background:var(--blue);color:#fff}.btn.primary:hover{background:var(--blue-dark)}
.btn.secondary{background:var(--s200);color:var(--s700)}.btn.secondary:hover{background:var(--s300)}
.overlay{position:fixed;inset:0;background:rgba(15,23,42,.5);display:none;align-items:center;justify-content:center;z-index:99}
.overlay.show{display:flex}
.spinner-box{background:var(--white);border-radius:14px;padding:2.5rem 3rem;text-align:center}
.spinner{width:40px;height:40px;border:3px solid var(--s200);border-top-color:var(--blue);border-radius:50%;animation:spin .7s linear infinite;margin:0 auto 1rem}
@keyframes spin{to{transform:rotate(360deg)}}
.spinner-box p{color:var(--s600);font-size:.875rem}
.hidden{display:none!important}
@media(max-width:640px){.sidebar{display:none}.main{margin-left:0;padding:1.5rem 1rem}#reportOutput{padding:1.5rem 1rem}.format-cards{grid-template-columns:1fr}}
@media print{.sidebar,.report-toolbar,.format-cards,.drop-zone,.upload-status,.style-row,.hidden{display:none!important}.main{margin-left:0;padding:0}#reportOutput{border:none;box-shadow:none;padding:1rem}.page{display:block!important}#page-1{display:none!important}}