.pisa-header{background:linear-gradient(180deg, #5a9ad0 0%, var(--pisa-blue-mid) 55%, #3f7faf 100%);color:#fff;border-bottom:1px solid #143c5f2e;flex-shrink:0;align-items:center;gap:14px;min-height:60px;padding:10px 16px;display:flex}.logo-block{flex-direction:column;gap:1px;min-width:0;max-width:min(280px,42vw);display:flex}.logo{letter-spacing:.01em;white-space:normal;font-size:clamp(.78rem,1.6vw,1.05rem);font-weight:800;line-height:1.2}.logo-sub{opacity:.88;letter-spacing:.02em;font-size:.72rem;font-weight:600}.progress-track{flex:1;align-items:center;gap:6px;margin-left:4px;display:flex}.progress-seg{cursor:default;color:#355522;width:32px;height:28px;transition:transform .15s var(--ease), background .15s;background:#d4e8b8d9;border:1px solid #ffffff59;border-radius:6px;justify-content:center;align-items:center;padding:0;font-size:.78rem;font-weight:800;display:inline-flex}.progress-seg.done{background:var(--pisa-green-deep);color:#fff}.progress-seg.current{color:var(--pisa-blue-deep);background:#fff;box-shadow:0 0 0 2px #ffffff59}.progress-seg.clickable{cursor:pointer}.progress-seg.clickable:hover{filter:brightness(1.05);transform:translateY(-1px)}.progress-seg:disabled{opacity:1}.timer{font-variant-numeric:tabular-nums;background:#ffffff29;border:1px solid #ffffff38;border-radius:10px;flex-direction:column;justify-content:center;align-items:center;min-width:5.2rem;padding:4px 14px;line-height:1.1;display:flex}.timer-label{letter-spacing:.08em;text-transform:uppercase;opacity:.85;font-size:.62rem;font-weight:700}.timer-value{font-size:1.05rem;font-weight:800}.timer.urgent{background:#c62828;border-color:#ffffff40;animation:1s ease-in-out infinite pulse}@keyframes pulse{50%{opacity:.82}}.hdr-actions{align-items:center;gap:8px;display:flex}.hdr-btn{background:linear-gradient(180deg, #9ccc65, var(--pisa-green));color:#fff;cursor:pointer;width:40px;height:40px;transition:transform .15s var(--ease), filter .15s;border:none;border-radius:8px;justify-content:center;align-items:center;display:inline-flex;box-shadow:0 1px 2px #0000002e}.hdr-btn:hover:not(:disabled){filter:brightness(1.06);transform:translateY(-1px)}.hdr-btn:disabled{opacity:.4;cursor:not-allowed;transform:none}.hdr-next{background:linear-gradient(180deg, #8bc34a, var(--pisa-green-deep))}@media (width<=700px){.pisa-header{flex-wrap:wrap;gap:10px}.progress-track{flex-basis:100%;order:3;margin-left:0}.logo-sub{display:none}}.home-page{flex-direction:column;min-height:100vh;display:flex;position:relative}.home-shell{width:min(980px,100% - 40px);animation:rise-in .55s var(--ease) both;margin:48px auto 64px}.home-hero{max-width:640px;margin-bottom:36px}.home-kicker{letter-spacing:.12em;text-transform:uppercase;color:var(--pisa-blue-deep);margin-bottom:12px;font-size:.78rem;font-weight:700}.home-hero h1{letter-spacing:-.03em;color:var(--pisa-ink);margin-bottom:14px;font-size:clamp(2rem,4vw,2.75rem);font-weight:800;line-height:1.15}.lead{color:var(--pisa-muted);font-size:1.05rem;line-height:1.65}.lead strong{color:var(--pisa-ink);font-weight:700}.subject-grid{grid-template-columns:repeat(3,1fr);gap:16px;display:grid}.subject-card{text-align:left;cursor:pointer;transition:transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s;background:linear-gradient(165deg,#fffffff2,#f7fbffeb);border:1px solid #b7c9d8e6;border-radius:14px;flex-direction:column;align-items:flex-start;gap:6px;min-height:210px;padding:22px 22px 20px;display:flex;position:relative;overflow:hidden}.subject-card:before{content:"";background:linear-gradient(180deg, var(--pisa-blue-mid), var(--pisa-green));opacity:0;width:4px;transition:opacity .25s;position:absolute;inset:0 auto 0 0}.subject-card:not(.locked):hover{border-color:var(--pisa-blue);box-shadow:var(--shadow-soft);transform:translateY(-4px)}.subject-card:not(.locked):hover:before{opacity:1}.subject-card:disabled,.subject-card.locked{cursor:not-allowed;opacity:.72;filter:grayscale(.25)}.subject-card.locked .subject-cta{color:var(--pisa-muted)}.subject-index{letter-spacing:.08em;color:var(--pisa-blue);margin-bottom:8px;font-size:.75rem;font-weight:800}.subject-name{letter-spacing:-.02em;color:var(--pisa-ink);font-size:1.35rem;font-weight:800}.subject-focus{color:var(--pisa-blue-deep);margin-top:2px;font-size:.92rem;font-weight:600}.subject-meta{color:var(--pisa-muted);flex:1;margin-top:2px;font-size:.88rem;line-height:1.45}.subject-cta{color:var(--pisa-blue-deep);align-items:center;gap:8px;margin-top:16px;font-size:.88rem;font-weight:700;display:inline-flex}.subject-card:not(.locked):hover .subject-cta span{transform:translate(3px)}.subject-cta span{transition:transform .2s var(--ease);display:inline-block}.home-shell-register{flex:1;justify-content:center;align-items:center;width:min(480px,100% - 40px);margin:0 auto;padding:32px 0 48px;display:flex}.home-page:has(.home-shell-register){min-height:100vh}.register-panel{text-align:center;width:100%}.register-intro{margin-bottom:22px}.register-intro .home-kicker{margin-bottom:10px}.register-intro h1{letter-spacing:-.03em;color:var(--pisa-ink);margin-bottom:10px;font-size:clamp(1.85rem,4vw,2.35rem);font-weight:800;line-height:1.15}.register-intro .lead{max-width:38ch;margin:0 auto;font-size:.98rem;line-height:1.55}.register-form{text-align:left;background:#fffffff7;border:1px solid #b7c9d8bf;border-radius:16px;flex-direction:column;gap:18px;padding:28px 26px 24px;display:flex;position:relative;overflow:hidden;box-shadow:0 18px 40px #1c37501a,inset 0 1px #fffc}.register-form:before{content:"";background:linear-gradient(90deg, var(--pisa-blue-mid), var(--pisa-green));height:4px;position:absolute;top:0;left:0;right:0}.field{flex-direction:column;gap:7px;display:flex}.field-label{letter-spacing:.07em;text-transform:uppercase;color:var(--pisa-muted);font-size:.74rem;font-weight:800}.field input,.field select{border:1.5px solid var(--pisa-line);width:100%;color:var(--pisa-ink);background:#f8fbfd;border-radius:10px;padding:13px 14px;font-size:1rem;transition:border-color .15s,box-shadow .15s,background .15s}.field select{cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%235a6b7a' d='M1.4.6 6 5.2 10.6.6 12 2 6 8 0 2z'/%3E%3C/svg%3E");background-position:right 14px center;background-repeat:no-repeat;padding-right:36px}.field input:hover,.field select:hover{background:#fff;border-color:#9bb4c8}.field input:focus,.field select:focus{border-color:var(--pisa-blue);background:#fff;outline:none;box-shadow:0 0 0 3px #3d7eb52e}.field input[aria-invalid=true],.field select[aria-invalid=true]{border-color:var(--pisa-bad)}.field-error{color:var(--pisa-bad);font-size:.82rem;font-weight:600}.register-submit{border-radius:10px;width:100%;margin-top:8px;padding:13px 22px}.student-chip{background:#ffffffe0;border:1px solid #b7c9d8e6;border-radius:12px;max-width:520px;margin-top:22px;padding:14px 16px}.student-info{flex-direction:column;gap:6px;margin:0;display:flex}.student-info>div{grid-template-columns:4.5rem 1fr;align-items:baseline;gap:8px;display:grid}.student-info dt{color:var(--pisa-ink);margin:0;font-size:.92rem;font-weight:800}.student-info dd{color:var(--pisa-muted);word-break:break-word;margin:0;font-size:.92rem;font-weight:600}.linkish-btn{color:var(--pisa-blue-deep);cursor:pointer;background:0 0;border:none;border-radius:6px;padding:6px 8px;font-size:.88rem;font-weight:700}.linkish-btn:hover{background:var(--pisa-blue-mist)}.running-totals{color:var(--pisa-ink);flex-wrap:wrap;align-items:baseline;gap:10px;margin-top:14px;font-size:.95rem;display:flex}.running-label{letter-spacing:.08em;text-transform:uppercase;color:var(--pisa-muted);font-size:.72rem;font-weight:800}.running-totals strong{color:var(--pisa-blue-deep);font-size:1.15rem}.running-meta{color:var(--pisa-muted);font-size:.88rem}.subject-score{color:var(--pisa-green-deep);margin-top:8px;font-size:.82rem;font-weight:700}@keyframes rise-in{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@media (width<=860px){.subject-grid{grid-template-columns:1fr}.subject-card{min-height:0}}.question-pane{border-right:1px solid var(--pisa-line);background:linear-gradient(#f7faf8 0%,#f2f6f4 100%);max-height:calc(100vh - 60px);overflow-y:auto}.q-header{background:linear-gradient(180deg, #c9dff0 0%, var(--pisa-blue-soft) 100%);border-bottom:1px solid #9ab8d0b3;padding:14px 18px}.q-header h2{letter-spacing:-.01em;color:var(--pisa-ink);margin-bottom:3px;font-size:1.05rem;font-weight:800}.q-header .q-count{color:var(--pisa-muted);font-size:.82rem;font-weight:600}.q-body{padding:18px 18px 28px}.q-instruction{color:var(--pisa-muted);margin-bottom:14px;font-size:.9rem;font-style:italic;line-height:1.5}.q-text{color:var(--pisa-ink);margin-bottom:16px;font-size:1.02rem;font-weight:600;line-height:1.55}.options{flex-direction:column;gap:10px;display:flex}.option{cursor:pointer;transition:border-color .18s, background .18s, box-shadow .18s, transform .18s var(--ease);background:#ffffffeb;border:1.5px solid #c9d7e3;border-radius:10px;align-items:flex-start;gap:12px;padding:12px 14px;line-height:1.4;display:flex}.option:hover{border-color:var(--pisa-blue);background:#f3f9fd;transform:translateY(-1px)}.option.selected{border-color:var(--pisa-blue);background:#e3f0fa;box-shadow:inset 0 0 0 1px #3d7eb533}.option input{accent-color:var(--pisa-blue-deep);flex-shrink:0;width:16px;height:16px;margin-top:3px}.option span{font-size:.95rem;font-weight:500}.interact-note{background:#e8f2fb;border:1px solid #b7d0e4;border-radius:12px;padding:14px}.interact-note strong{color:var(--pisa-blue-deep);letter-spacing:.04em;text-transform:uppercase;margin-bottom:6px;font-size:.85rem;display:block}.interact-note p{color:var(--pisa-muted);margin:0;font-size:.92rem;line-height:1.45}.interact-progress{color:var(--pisa-ink)!important;margin-top:10px!important;font-weight:700!important}@media (width<=800px){.question-pane{border-right:none;border-bottom:1px solid var(--pisa-line);max-height:none}}.math-stim{flex-direction:column;align-items:center;padding:12px 14px 20px;display:flex}.math-ref-label{letter-spacing:.06em;text-transform:uppercase;color:var(--pisa-muted);align-self:flex-start;margin-bottom:10px;font-size:.72rem;font-weight:800}.math-ref-img{border:1px solid var(--pisa-line);object-fit:contain;background:#fff;border-radius:8px;width:auto;max-width:min(100%,540px);height:auto;max-height:calc(100vh - 140px);margin:0 auto;display:block;box-shadow:0 2px 10px #1c375014}.math-ref-caption{color:var(--pisa-muted);text-align:center;max-width:540px;margin-top:8px;font-size:.85rem;line-height:1.4}@media (width<=900px){.math-ref-img{max-width:100%;max-height:none}}.math-solar{align-items:stretch}.solar-card{border:1px solid var(--pisa-line);color:#1c2530;background:#fff;border-radius:8px;width:100%;max-width:520px;margin:0 auto;padding:18px 20px 22px;font-size:.95rem;line-height:1.45;box-shadow:0 2px 10px #1c375014}.solar-title{text-align:center;letter-spacing:.04em;margin:0 0 14px;font-size:1.15rem;font-weight:800}.solar-card p{margin:0 0 10px}.solar-table{border-collapse:collapse;width:100%;margin-top:12px;font-size:.92rem}.solar-table th,.solar-table td{border:1px solid #2a3340;padding:8px 12px}.solar-table th{text-align:left;background:#d4b887;font-weight:700}.solar-table td:last-child{text-align:center;width:48%}.solar-table tbody tr:nth-child(2n){background:#f3f5f7}.interact-board{padding:16px 18px 24px}.interact-title{color:var(--pisa-ink);letter-spacing:-.02em;margin-bottom:6px;font-size:1.25rem;font-weight:800}.goal-line{color:var(--pisa-muted);margin-bottom:14px;font-size:.98rem;line-height:1.45}.goal-line strong{color:var(--pisa-ink)}.how-steps{grid-template-columns:repeat(3,1fr);gap:8px;margin:0 0 16px;padding:0;list-style:none;display:grid}.how-steps li{color:var(--pisa-ink);background:#eef5fb;border:1px solid #c9dceb;border-radius:10px;align-items:center;gap:8px;padding:10px 12px;font-size:.84rem;font-weight:600;line-height:1.3;display:flex}.how-steps li span{background:var(--pisa-blue-deep);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:22px;height:22px;font-size:.75rem;font-weight:800;display:inline-flex}.interact-hint{color:var(--pisa-muted);margin-top:12px;font-size:.88rem;font-weight:600}.bank-label{letter-spacing:.04em;text-transform:uppercase;color:var(--pisa-muted);margin:16px 0 8px;font-size:.78rem;font-weight:800}.item-bank{border:1px solid var(--pisa-line);background:#f3f8fc;border-radius:12px;flex-wrap:wrap;gap:8px;min-height:52px;padding:12px;display:flex}.bank-empty{color:var(--pisa-muted);font-size:.88rem}.chip{font:inherit;color:#fff;background:var(--chip,var(--pisa-blue));cursor:grab;transition:transform .15s var(--ease), box-shadow .15s;border:none;border-radius:999px;padding:9px 14px;font-size:.9rem;font-weight:700;box-shadow:0 2px 6px #14283c1f}.chip:active{cursor:grabbing}.chip:hover{transform:translateY(-1px)}.chip.selected{box-shadow:0 0 0 3px var(--pisa-blue-deep);outline:3px solid #fff}.chip.placed{cursor:pointer}.slot-placeholder{color:#7d8f9e;font-size:.84rem;font-weight:600}.orbit-track{background:linear-gradient(135deg,#0b1d3a,#1a3a66);border:1px solid #1a3358;border-radius:16px;align-items:stretch;gap:8px;padding:14px 12px;display:flex;overflow-x:auto}.sun-node{color:#ffe08a;flex-direction:column;justify-content:center;align-items:center;gap:6px;min-width:64px;font-size:.75rem;font-weight:800;display:flex}.sun-ball{background:radial-gradient(circle at 35% 35%,#ffe9a0,#ffb703 55%,#fb8500);border-radius:50%;width:48px;height:48px;box-shadow:0 0 18px #ffb7038c}.orbit-arrow{writing-mode:vertical-rl;letter-spacing:.06em;text-transform:uppercase;color:#ffffffb3;justify-content:center;align-items:center;padding:0 2px;font-size:.68rem;font-weight:800;display:flex;transform:rotate(180deg)}.orbit-slots{flex:1;grid-template-columns:repeat(8,minmax(78px,1fr));gap:6px;min-width:640px;display:grid}.orbit-drop{background:#ffffff14;border:2px dashed #ffffff59;border-radius:12px;flex-direction:column;align-items:center;gap:6px;min-height:110px;padding:8px 6px;transition:background .15s,border-color .15s,box-shadow .15s;display:flex}.orbit-drop.awaiting{background:#7ec8ff26;border-color:#7ec8ff;box-shadow:inset 0 0 0 1px #7ec8ff59}.orbit-drop.filled{background:#ffffff1f;border-style:solid;border-color:#ffffff73}.orbit-num{color:#123054;background:#fff;border-radius:50%;justify-content:center;align-items:center;width:22px;height:22px;font-size:.72rem;font-weight:800;display:inline-flex}.orbit-empty{color:#ffffff8c;margin-top:12px;font-size:.75rem;font-weight:600}.planet-token{cursor:grab;background:0 0;border:none;border-radius:10px;flex-direction:column;align-items:center;gap:6px;padding:4px;display:flex}.planet-token:active{cursor:grabbing}.planet-token.selected{outline-offset:2px;background:#ffffff1f;outline:3px solid #fff}.planet-token.placed{cursor:pointer}.planet-ball{background:radial-gradient(circle at 30% 30%, #fff8, var(--p,#4a8bc2));border-radius:50%;display:block;box-shadow:0 2px 8px #00000040}.planet-name{color:#fff;text-align:center;font-size:.72rem;font-weight:800;line-height:1.15}.planet-bank .planet-token{border:1px solid var(--pisa-line);background:#fff;min-width:76px;padding:8px 10px}.planet-bank .planet-name{color:var(--pisa-ink)}.planet-bank .planet-token.selected{outline-color:var(--pisa-blue-deep);background:#e8f3fb}.digestive-friendly-layout{grid-template-columns:1.05fr 1fr;align-items:start;gap:14px;display:grid}.digestive-map{border:1px solid var(--pisa-line);background:#fff;border-radius:14px;padding:10px}.digestive-map.photo{justify-content:center;align-items:center;padding:8px;display:flex}.digestive-map.photo img{object-fit:contain;border-radius:8px;width:100%;height:auto;max-height:520px;display:block}.digestive-map svg{width:100%;height:auto;display:block}.body-callout{fill:#fff;font-size:.8rem;font-weight:800}.org-caption{fill:#5a6b7a;font-size:.62rem;font-weight:700}.hint-box{background:#fff;border:1px solid #d5e3ef;border-radius:10px;margin-top:10px;padding:10px 12px}.hint-box strong{color:var(--pisa-blue-deep);margin-bottom:4px;font-size:.8rem;display:block}.hint-box p{color:var(--pisa-muted);margin:0 0 8px;font-size:.88rem}.hint-dots{gap:6px;display:flex}.hint-dots button{border:1px solid var(--pisa-line);width:28px;height:28px;color:var(--pisa-ink);cursor:pointer;background:#fff;border-radius:50%;font-size:.78rem;font-weight:800}.hint-dots button.on{background:var(--pisa-blue-deep);border-color:var(--pisa-blue-deep);color:#fff}.digest-drop-list{flex-direction:column;gap:8px;display:flex}.drop-list-title{letter-spacing:.05em;text-transform:uppercase;color:var(--pisa-muted);margin-bottom:2px;font-size:.75rem;font-weight:800}.digest-row{background:#fff;border:2px dashed #9eb3c4;border-radius:12px;grid-template-columns:40px 1fr;align-items:center;gap:10px;min-height:64px;padding:10px 12px;transition:border-color .15s,background .15s,box-shadow .15s;display:grid}.digest-row.awaiting,.digest-row.focus{border-color:var(--pisa-blue);background:#eef6fc}.digest-row.filled{background:#f3faf7;border-style:solid;border-color:#9bc4b8}.digest-num{color:#fff;background:#2f6fad;border-radius:50%;justify-content:center;align-items:center;width:36px;height:36px;font-size:1rem;font-weight:800;display:flex}.digest-row-label{color:var(--pisa-muted);margin-bottom:4px;font-size:.75rem;font-weight:700}.order-cycle .cycle-reference{background:#fff;border:1px solid #cfdceb;border-radius:14px;margin-bottom:14px;overflow:hidden}.order-cycle .cycle-reference-label{letter-spacing:.06em;text-transform:uppercase;color:var(--pisa-muted);padding:8px 12px 0;font-size:.72rem;font-weight:800}.order-cycle .cycle-reference img{width:100%;height:auto;padding:8px 10px 4px;display:block}.order-cycle .cycle-reference-note{color:var(--pisa-muted);margin:0;padding:0 12px 10px;font-size:.84rem;line-height:1.4}.order-cycle .cycle-rail{background:#fff;border:1px solid #cfdceb;border-radius:14px;margin:8px 0 4px;position:relative;overflow:hidden}.order-cycle .cycle-tabs{z-index:1;background:#eef4f9;grid-template-columns:repeat(4,1fr);gap:0;padding:12px 10px 0;display:grid;position:relative}.order-cycle .cycle-step{flex-direction:column;align-items:stretch;padding:0 5px 10px;display:flex;position:relative}.order-cycle .cycle-tab{color:#fff;cursor:pointer;min-height:88px;transition:transform .15s var(--ease), border-color .15s, box-shadow .15s;background:linear-gradient(#2b4f7a 0%,#1e3a5f 100%);border:2px solid #0000;border-radius:12px 12px 8px 8px;flex-direction:column;justify-content:center;align-items:center;gap:8px;padding:10px 10px 12px;display:flex;box-shadow:0 4px 10px #1428462e}.order-cycle .cycle-tab.awaiting{border-color:#7ec8ff;box-shadow:0 0 0 3px #7ec8ff59}.order-cycle .cycle-tab.filled{background:linear-gradient(#355f8f 0%,#24486f 100%)}.order-cycle .cycle-tab-num{letter-spacing:.06em;text-transform:uppercase;opacity:.85;font-size:.72rem;font-weight:800}.order-cycle .cycle-tab-empty{opacity:.7;font-size:.82rem;font-weight:600}.order-cycle .cycle-tab-value{color:#fff;font:inherit;cursor:pointer;background:#ffffff29;border:none;border-radius:8px;max-width:100%;padding:6px 10px;font-size:.84rem;font-weight:700;line-height:1.25}.order-cycle .cycle-pointer{filter:drop-shadow(0 -1px #0000000d);border-bottom:10px solid #fff;border-left:8px solid #0000;border-right:8px solid 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