@import "https://fonts.googleapis.com/css2?family=Quicksand:wght@400;500;600;700&display=swap";:root{--paper:#fff8f4;--paper-warm:#faf2eb;--ink:#2e2623;--line:#4a2c21;--line-light:#4a2c211f;--muted:#786259;--muted-light:#a18c7b;--neutral-light:#bfb0a9;--accent:#8c452b;--accent-hover:#6e321e;--accent-soft:#8c452b14;--dark-bg:#2e2623;--dark-fg:#fff8f4;--dark-line:#89736a;--success:#2e6943;--success-bg:#e4f2e9;--success-border:#81b893;--warning:#965604;--warning-bg:#fcf3e6;--warning-border:#e0ab60;--error:#a8382c;--error-bg:#f9eae8;--error-border:#d68b83;--info:#4a2c21;--info-bg:#f4ece8;--info-border:#a18c7b;--official:#4a2c21;--recommended:#8c452b;--school:#2e6943;--suggestion:#89736a;--sp-1:.25rem;--sp-2:.5rem;--sp-3:.75rem;--sp-4:1rem;--sp-5:1.5rem;--sp-6:2rem;--sp-7:3rem;--r-sm:6px;--r-md:10px;--r-lg:16px;--r-pill:999px;--shadow-sm:0 1px 3px #2e26230f;--shadow-md:0 4px 12px #2e262314;--shadow-lg:0 12px 32px #2e26231f;--focus-ring:0 0 0 3px #8c452b4d;--content-width:1080px;--watermark-opacity:.06}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}body{background-color:var(--paper);background-image:radial-gradient(circle at 10% 20%, #bfb0a91f 0%, transparent 20%), radial-gradient(circle at 90% 80%, #8c452b0f 0%, transparent 25%), linear-gradient(180deg, var(--paper) 0%, var(--paper-warm) 100%);color:var(--ink);flex-direction:column;min-height:100vh;margin:0;font-family:Quicksand,Poppins,Nunito Sans,-apple-system,sans-serif;font-size:16px;font-weight:500;line-height:1.6;display:flex}body:before{content:"";aspect-ratio:308/291;width:min(72vmin,540px);opacity:var(--watermark-opacity);pointer-events:none;z-index:5;filter:sepia(.3)contrast(1.1);background:url(/assets/tapovan-watermark-BzId0eRM.png) 50%/contain no-repeat;position:fixed;top:50%;left:50%;transform:translate(-50%,-50%)}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}html{scroll-behavior:auto}.card.interactive:hover,.class-tile:hover,.subject-tile:hover{transform:none}.spinner,.busy-bar:after{animation:none}}[x-cloak],[hidden]{display:none!important}a{color:var(--ink);text-decoration:none;transition:color .15s,-webkit-text-decoration .15s,text-decoration .15s}a:hover{color:var(--accent);text-underline-offset:3px;text-decoration:underline}:focus-visible{outline:2px solid var(--line);outline-offset:2px;border-radius:var(--r-sm)}h1,h2,h3,h4,h5,h6{color:var(--ink);margin-top:0;font-family:Quicksand,sans-serif;font-weight:700;line-height:1.25}h1{margin-bottom:var(--sp-2);letter-spacing:-.015em;font-size:1.75rem}h2{margin-bottom:var(--sp-3);letter-spacing:-.01em;font-size:1.25rem}h3{margin-bottom:var(--sp-2);font-size:1.05rem}p{margin:0 0 var(--sp-3)}p:last-child{margin-bottom:0}.subtitle{color:var(--muted);margin:0 0 var(--sp-5);max-width:68ch;font-size:1rem}.muted{color:var(--muted);font-size:.875rem}.flag{color:var(--error);font-weight:600}.strong{font-weight:700}.page-kicker,.caption-label,.step-label{letter-spacing:.08em;text-transform:uppercase;color:var(--line);align-items:center;gap:var(--sp-1);font-family:Quicksand,sans-serif;font-size:.78rem;font-weight:600;display:inline-flex}.icon{vertical-align:-.18em;stroke:currentColor;stroke-linecap:round;stroke-linejoin:round;flex:none;width:1.1em;height:1.1em}.icon.lg{width:1.5rem;height:1.5rem}.icon.xl{width:2.2rem;height:2.2rem}.skip-link{background:var(--line);color:var(--paper);padding:var(--sp-3) var(--sp-4);z-index:100;border-radius:0 0 var(--r-md) 0;font-weight:600;position:absolute;top:0;left:-9999px}.skip-link:focus{color:var(--paper);left:0}.dot-divider{text-align:center;margin:var(--sp-5) 0;color:var(--neutral-light);align-items:center;display:flex}.dot-divider:before,.dot-divider:after{content:"";border-bottom:1px dashed var(--neutral-light);flex:1}.dot-divider:before{margin-right:var(--sp-3)}.dot-divider:after{margin-left:var(--sp-3)}.dot-divider-icon{background:var(--line);border-radius:50%;width:8px;height:8px;display:inline-block}header.topbar{background-color:var(--dark-bg);color:var(--dark-fg);padding:var(--sp-3) var(--sp-5);justify-content:space-between;align-items:center;gap:var(--sp-4);border-bottom:1px solid var(--dark-line);box-shadow:var(--shadow-md);z-index:30;flex-wrap:wrap;display:flex;position:sticky;top:0}header.topbar a{color:var(--dark-fg);text-decoration:none}.brand{align-items:center;gap:var(--sp-3);font-size:1.05rem;font-weight:700;line-height:1.2;display:flex}.brand-mark{border:1.5px solid var(--neutral-light);width:36px;height:36px;color:var(--paper);background:0 0;border-radius:50%;flex:0 0 36px;place-items:center;font-size:.95rem;font-weight:700;display:grid}.brand-logo{background:var(--paper);object-fit:contain;border:1.5px solid var(--neutral-light);border-radius:50%;flex:0 0 40px;width:40px;height:40px;padding:3px}.brand-text{font-family:Quicksand,sans-serif}.brand-text small{letter-spacing:.08em;text-transform:uppercase;color:var(--neutral-light);font-size:.72rem;font-weight:600;display:block}.nav-links{gap:var(--sp-3);align-items:center;font-size:.9rem;display:flex}.topnav{align-items:center;gap:var(--sp-2);display:flex}.topnav a{align-items:center;gap:var(--sp-2);border-radius:var(--r-pill);border:1.5px solid var(--dark-line);color:var(--paper);background:0 0;padding:.4rem .9rem;font-weight:600;transition:border-color .15s,color .15s;display:inline-flex}.topnav a:hover{border-color:var(--paper);color:var(--paper);text-decoration:none}.user-chip{align-items:center;gap:var(--sp-2);border-radius:var(--r-pill);border:1.5px solid var(--dark-line);color:var(--paper);background:0 0;padding:.25rem .8rem .25rem .35rem;font-weight:600;display:inline-flex}.user-chip:hover{border-color:var(--paper);text-decoration:none}.user-chip .avatar{background:var(--accent);width:26px;height:26px;color:var(--paper);border-radius:50%;place-items:center;font-size:.75rem;font-weight:700;display:grid}main.container{width:100%;max-width:var(--content-width);padding:var(--sp-5) var(--sp-5) var(--sp-7);flex:1 0 auto;margin:0 auto}footer.sitefoot{border-top:1px solid var(--neutral-light);background:var(--paper-warm);color:var(--muted);padding:var(--sp-4) var(--sp-5);text-align:center;flex-shrink:0;font-size:.85rem;font-weight:500}.page-head{margin-bottom:var(--sp-5)}.page-head h1{margin-bottom:var(--sp-1)}.workflow-strip{gap:var(--sp-3);margin-bottom:var(--sp-5);grid-template-columns:repeat(3,minmax(0,1fr));display:grid}.workflow-step{align-items:center;gap:var(--sp-3);min-width:0;padding:var(--sp-3) var(--sp-4);border:1.5px solid var(--neutral-light);border-radius:var(--r-pill);background:var(--paper);color:var(--muted);font-size:.9rem;font-weight:600;transition:border-color .15s,background .15s;display:flex}.step-num{border:1.5px solid var(--line);background:var(--paper-warm);width:26px;height:26px;color:var(--line);border-radius:50%;flex:0 0 26px;place-items:center;font-size:.82rem;font-weight:700;display:grid}.workflow-step.is-current{border-color:var(--line);background:var(--paper);color:var(--ink);border-width:2px}.workflow-step.is-current .step-num{background:var(--line);color:var(--paper)}.workflow-step.is-done{border-color:var(--success-border);background:var(--success-bg);color:var(--success)}.workflow-step.is-done .step-num{border-color:var(--success);background:var(--success);color:var(--paper)}.split{justify-content:space-between;align-items:center;gap:var(--sp-4);flex-wrap:wrap;display:flex}.actions{gap:var(--sp-2);flex-wrap:wrap;align-items:center;display:flex}.stack{gap:var(--sp-3);flex-direction:column;display:flex}.grid-2{gap:var(--sp-4);grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.grid-3{gap:var(--sp-4);grid-template-columns:repeat(3,minmax(0,1fr));display:grid}.card-grid{gap:var(--sp-4);grid-template-columns:repeat(auto-fill,minmax(280px,1fr));display:grid}.breadcrumb{align-items:center;gap:var(--sp-2);color:var(--line);margin-bottom:var(--sp-4);border-radius:var(--r-pill);border:1.5px solid var(--neutral-light);background:var(--paper);padding:.35rem .8rem .35rem .5rem;font-size:.88rem;font-weight:600;text-decoration:none;display:inline-flex}.breadcrumb:hover{border-color:var(--line);color:var(--ink);text-decoration:none}.card{background:var(--paper);border:1.5px solid var(--neutral-light);border-radius:var(--r-lg);padding:var(--sp-5);margin-bottom:var(--sp-4);box-shadow:var(--shadow-sm);position:relative}.card:last-child{margin-bottom:0}.card-head{justify-content:space-between;align-items:flex-start;gap:var(--sp-4);margin-bottom:var(--sp-3);flex-wrap:wrap;display:flex}.card-head h2,.card-head h1{margin-bottom:0}.card-hint{color:var(--muted);margin:-.25rem 0 var(--sp-4);font-size:.88rem}.card.interactive{transition:box-shadow .2s,border-color .2s,transform .2s}.card.interactive:hover{box-shadow:var(--shadow-md);border-color:var(--line);transform:translateY(-2px)}.card.edge-danger{border-left:5px solid var(--error)}.card.edge-warning{border-left:5px solid var(--warning)}.card.edge-info{border-left:5px solid var(--line)}.card-toolbar{z-index:20;position:sticky;top:70px}.class-card{color:inherit;flex-direction:column;margin-bottom:0;text-decoration:none;display:flex}.class-card-icon{border:1.5px solid var(--line);background:var(--paper-warm);width:44px;height:44px;color:var(--line);margin-bottom:var(--sp-3);border-radius:50%;place-items:center;display:grid}.class-card h2{margin-bottom:var(--sp-1)}.class-card-subject{color:var(--accent);margin-bottom:var(--sp-3);font-weight:700}.class-card-cta{align-items:center;gap:var(--sp-2);color:var(--line);margin-top:auto;font-size:.9rem;font-weight:700;transition:gap .15s,color .15s;display:inline-flex}.class-card:hover .class-card-cta{color:var(--accent);gap:var(--sp-3)}.btn{justify-content:center;align-items:center;gap:var(--sp-2);border-radius:var(--r-pill);border:1.5px solid var(--ink);color:var(--ink);cursor:pointer;white-space:nowrap;background:0 0;padding:.6rem 1.3rem;font-family:Quicksand,sans-serif;font-size:.94rem;font-weight:600;line-height:1.2;transition:border-width .12s,border-color .12s,color .12s,transform .1s;display:inline-flex;text-decoration:none!important}.btn:hover{border-width:2.5px;border-color:var(--ink);color:var(--ink);background:0 0}.btn:active{border-width:3px;border-color:var(--ink);color:var(--ink);background:0 0;transform:translateY(1px)}.btn:focus-visible{box-shadow:var(--focus-ring);outline:none}.btn[disabled],.btn:disabled{opacity:.65;cursor:not-allowed;border-color:var(--muted)!important;color:var(--muted)!important;background:0 0!important;border-width:1.5px!important;transform:none!important}.btn.secondary{border-color:var(--line);color:var(--line);background:0 0}.btn.secondary:hover{border-color:var(--ink);color:var(--ink);border-width:2.5px}.btn.ghost{color:var(--ink);background:0 0;border-color:#0000}.btn.ghost:hover{border-color:var(--neutral-light);color:var(--accent);border-width:1.5px}.btn.on-dark{border-color:var(--dark-line);color:var(--paper);background:0 0}.btn.on-dark:hover{border-color:var(--paper);color:var(--paper);border-width:2.5px}.btn.danger{border-color:var(--error);color:var(--error);background:0 0}.btn.danger:hover{border-color:var(--error);color:var(--error);border-width:2.5px}.btn.small{padding:.35rem .85rem;font-size:.84rem}.btn.block{width:100%}.btn svg{flex:none}label{margin-bottom:var(--sp-2);color:var(--ink);font-family:Quicksand,sans-serif;font-size:.88rem;font-weight:600;display:block}input[type=text],input[type=number],input[type=password],input[type=search],select,textarea{border:1.5px solid var(--neutral-light);border-radius:var(--r-md);width:100%;color:var(--ink);background-color:var(--paper);padding:.6rem .85rem;font-family:Quicksand,sans-serif;font-size:.95rem;transition:border-color .15s,box-shadow .15s}input::placeholder,textarea::placeholder{color:var(--muted);opacity:.8}input:focus,select:focus,textarea:focus{border-color:var(--line);box-shadow:var(--focus-ring);outline:none}input:disabled,select:disabled,textarea:disabled{border-color:var(--neutral-light);color:var(--muted);background-color:var(--paper-warm);cursor:not-allowed}.field{margin-bottom:var(--sp-4)}.field-row{gap:var(--sp-4);display:flex}.field-narrow{flex:0 0 140px;width:140px}.hint{margin-top:var(--sp-1);color:var(--muted);font-size:.8rem;display:block}.label-optional{color:var(--muted);margin-left:var(--sp-1);font-weight:400}.input-affix{align-items:center;display:flex;position:relative}.input-affix input{padding-right:2.6rem}.affix-btn{color:var(--muted);cursor:pointer;border-radius:var(--r-sm);background:0 0;border:none;padding:.3rem;position:absolute;right:.5rem}.affix-btn:hover{color:var(--ink)}.alert{align-items:flex-start;gap:var(--sp-3);padding:var(--sp-4);border-radius:var(--r-md);border:1.5px solid var(--neutral-light);background:var(--paper-warm);color:var(--ink);margin-bottom:var(--sp-4);font-size:.92rem;display:flex}.alert.success{border-color:var(--success-border);background:var(--success-bg);color:var(--success)}.alert.warning{border-color:var(--warning-border);background:var(--warning-bg);color:var(--warning)}.alert.error,.alert.danger{border-color:var(--error-border);background:var(--error-bg);color:var(--error)}.alert.info{border-color:var(--info-border);background:var(--info-bg);color:var(--info)}.alert-title{margin-bottom:var(--sp-1);font-weight:700;display:block}.chip{align-items:center;gap:var(--sp-1);border-radius:var(--r-pill);border:1.5px solid var(--neutral-light);background:var(--paper);color:var(--line);padding:.25rem .65rem;font-size:.8rem;font-weight:600;display:inline-flex}.chip-link{color:var(--ink);text-decoration:none;transition:border-color .15s,color .15s}.chip-link:hover{border-color:var(--line);color:var(--accent);text-decoration:none}.status-pill{align-items:center;gap:var(--sp-1);border-radius:var(--r-pill);border:1.5px solid var(--neutral-light);padding:.3rem .75rem;font-size:.8rem;font-weight:700;display:inline-flex}.status-pill.ready{border-color:var(--success-border);background:var(--success-bg);color:var(--success)}.status-pill.draft{border-color:var(--warning-border);background:var(--warning-bg);color:var(--warning)}.switcher{justify-content:space-between;align-items:center;gap:var(--sp-4);padding:var(--sp-4);border:1.5px solid var(--neutral-light);border-radius:var(--r-lg);background:var(--paper);margin-bottom:var(--sp-5);flex-wrap:wrap;display:flex}.switcher-label{letter-spacing:.08em;text-transform:uppercase;color:var(--line);font-size:.78rem;font-weight:600;display:block}.class-grid{gap:var(--sp-3);margin:var(--sp-3) 0 var(--sp-5);grid-template-columns:repeat(auto-fill,minmax(64px,1fr));display:grid}.class-tile{border-radius:var(--r-md);border:1.5px solid var(--neutral-light);background:var(--paper);height:56px;color:var(--ink);cursor:pointer;place-items:center;font-family:Quicksand,sans-serif;font-size:1.2rem;font-weight:700;transition:border-color .15s,transform .15s;display:grid}.class-tile:hover{border-color:var(--line);transform:translateY(-1px)}.class-tile.is-selected{border-color:var(--line);background:var(--paper-warm);color:var(--line);border-width:2.5px}.subject-grid{gap:var(--sp-3);margin:var(--sp-3) 0;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));display:grid}.subject-slot{display:flex;position:relative}.subject-tile{padding:var(--sp-4);border-radius:var(--r-md);border:1.5px solid var(--neutral-light);background:var(--paper);color:var(--ink);text-align:left;flex-direction:column;flex:1;align-items:flex-start;font-family:Quicksand,sans-serif;transition:border-color .15s,box-shadow .15s;display:flex;text-decoration:none!important}.subject-tile-button{cursor:pointer;width:100%}.subject-tile:hover{border-color:var(--line);box-shadow:var(--shadow-sm)}.subject-tile.is-selected{border-color:var(--line);background:var(--paper-warm);border-width:2.5px}.subject-tile-name{margin-bottom:var(--sp-1);font-size:1.05rem;font-weight:700}.subject-tile-meta{color:var(--muted);font-size:.82rem}.picker-action{justify-content:space-between;align-items:center;gap:var(--sp-4);margin-top:var(--sp-5);padding-top:var(--sp-4);border-top:1px dashed var(--neutral-light);flex-wrap:wrap;display:flex}.chapter-preview{flex:360px}.chapter-preview-list{gap:var(--sp-2);margin:var(--sp-3) 0 0;padding:0;list-style:none;display:grid}.chapter-preview-list li{justify-content:space-between;align-items:center;gap:var(--sp-3);padding:var(--sp-2) var(--sp-3);border:1px solid var(--neutral-light);border-radius:var(--r-sm);background:var(--paper-warm);font-size:.9rem;display:flex}.chapter-preview-list .status-pill,.chapter-preview-actions{flex:none}.chapter-list{gap:var(--sp-4);flex-direction:column;display:flex}.chapter-card{border:1.5px solid var(--neutral-light);transition:border-color .2s,box-shadow .2s}.chapter-card:hover{border-color:var(--line);box-shadow:var(--shadow-sm)}.chapter-number{color:var(--accent);margin-right:var(--sp-2);font-weight:700}.chapter-actions{gap:var(--sp-3);margin-top:var(--sp-4);padding-top:var(--sp-4);border-top:1px dashed var(--neutral-light);grid-template-columns:repeat(auto-fit,minmax(240px,1fr));display:grid}.chapter-action{align-items:center;gap:var(--sp-3);padding:var(--sp-3) var(--sp-4);border-radius:var(--r-pill);border:1.5px solid var(--line);background:var(--paper);color:var(--ink);transition:border-width .12s,border-color .12s;display:flex;text-decoration:none!important}.chapter-action:hover{border-width:2.5px;border-color:var(--ink)}.chapter-action-primary{border-color:var(--ink);border-width:2px}.chapter-action span{flex-direction:column;display:flex}.chapter-action strong{font-size:.92rem;line-height:1.2}.chapter-action small{color:var(--muted);font-size:.78rem;font-weight:500}.worktools{justify-content:space-between;align-items:center;gap:var(--sp-4);flex-wrap:wrap;display:flex}.worktool-label{color:var(--line);align-items:center;gap:var(--sp-2);font-size:.84rem;font-weight:700;display:flex}.lang-choice{gap:var(--sp-2);display:flex}.lang-option{border-radius:var(--r-pill);border:1.5px solid var(--neutral-light);background:var(--paper);color:var(--ink);cursor:pointer;align-items:center;padding:.35rem .8rem;font-size:.85rem;font-weight:600;transition:border-color .15s;display:inline-flex}.lang-option input{opacity:0;width:0;height:0;position:absolute}.lang-option:hover{border-color:var(--line)}.lang-option.is-selected{border-color:var(--line);background:var(--paper-warm);border-width:2px;font-weight:700}.searchbar{gap:var(--sp-2);align-items:center;display:flex}.searchbar-input{align-items:center;display:flex;position:relative}.searchbar-input svg{color:var(--muted);pointer-events:none;position:absolute;left:.75rem}.searchbar-input input{padding-left:2.4rem}.login-shell{max-width:420px;margin:var(--sp-7) auto;width:100%}.login-card{padding:var(--sp-6);border:1.5px solid var(--neutral-light);border-radius:var(--r-lg);box-shadow:var(--shadow-md);background:var(--paper)}.login-head{text-align:center;margin-bottom:var(--sp-5)}.login-logo{width:64px;height:64px;margin:0 auto var(--sp-3);border:1.5px solid var(--neutral-light);background:var(--paper);border-radius:50%;padding:4px;display:block}.login-foot{text-align:center;margin-top:var(--sp-4)}.busy-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:200;padding:var(--sp-5);background:#2e2623b3;place-items:center;display:grid;position:fixed;inset:0}.busy-card{background:var(--paper);border:2px solid var(--line);border-radius:var(--r-lg);padding:var(--sp-6);text-align:center;width:100%;max-width:440px;box-shadow:var(--shadow-lg)}.spinner{border:3.5px solid var(--neutral-light);border-top-color:var(--line);width:44px;height:44px;margin:0 auto var(--sp-4);border-radius:50%;animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.busy-bar{background:var(--neutral-light);border-radius:var(--r-pill);height:6px;margin:var(--sp-4) 0;position:relative;overflow:hidden}.busy-bar:after{content:"";background:var(--line);border-radius:var(--r-pill);width:40%;height:100%;animation:1.5s ease-in-out 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