:root{--aca-navy:#102a43;--aca-blue:#1d4ed8;--aca-blue-soft:#eaf2ff;--aca-ink:#172033;--aca-muted:#5d6b7c;--aca-line:#dce3eb;--aca-surface:#fff;--aca-bg:#f4f7fb;--aca-green:#157347}.aca-app-page .entry-content{max-width:1240px;margin-inline:auto}.aca-app-page .site-content{background:var(--aca-bg)}.aca-shell,.aca-login{padding:clamp(1rem,3vw,2.5rem);color:var(--aca-ink)}.aca-shell h1,.aca-shell h2,.aca-shell h3{color:var(--aca-navy);margin-top:0}.aca-shell section+section{margin-top:2.25rem}.aca-login{max-width:32rem;margin:3rem auto;border:1px solid var(--aca-line);border-radius:16px;background:#fff;box-shadow:0 12px 35px rgba(16,42,67,.09)}.aca-login label{display:block;font-weight:600}.aca-login input[type=text],.aca-login input[type=password]{width:100%;min-height:44px}.aca-hero{display:flex;align-items:center;justify-content:space-between;gap:2rem;padding:clamp(1.5rem,4vw,3rem);border-radius:20px;background:linear-gradient(135deg,#102a43,#174d7a);color:#fff;box-shadow:0 18px 45px rgba(16,42,67,.18)}.aca-hero h1,.aca-hero .aca-eyebrow{color:#fff}.aca-hero p{max-width:48rem;margin-bottom:0}.aca-page-header{max-width:52rem;margin-bottom:1.5rem}.aca-eyebrow,.aca-provider{margin:0 0 .35rem;text-transform:uppercase;letter-spacing:.11em;font-size:.75rem;font-weight:800;color:var(--aca-blue)}.aca-section-heading,.aca-cert-top,.aca-current-card{display:flex;align-items:center;justify-content:space-between;gap:1rem}.aca-section-heading{margin:2rem 0 1rem}.aca-section-heading h2{margin-bottom:0}.aca-grid,.aca-cert-grid,.aca-stat-grid{display:grid;gap:1rem}.aca-grid{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}.aca-cert-grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,320px),1fr))}.aca-stat-grid{grid-template-columns:repeat(4,1fr);margin:1rem 0}.aca-stat,.aca-card,.aca-empty{padding:1.25rem;border:1px solid var(--aca-line);border-radius:14px;background:var(--aca-surface)}.aca-stat strong{display:block;font-size:1.65rem;color:var(--aca-navy)}.aca-stat span{color:var(--aca-muted);font-size:.9rem}.aca-card{box-shadow:0 6px 18px rgba(16,42,67,.05)}.aca-current-card{padding:1.5rem}.aca-current-card h3,.aca-tutor-card h3,.aca-cert-card h2{margin-bottom:.4rem}.aca-tutor-card{min-height:215px;display:flex;flex-direction:column}.aca-tutor-card p{color:var(--aca-muted)}.aca-tutor-card .aca-text-link{margin-top:auto}.aca-card-icon{display:grid;place-items:center;width:42px;height:42px;margin-bottom:1rem;border-radius:12px;background:var(--aca-blue-soft);color:var(--aca-blue);font-weight:800}.aca-card-icon-math{background:#ecfdf3;color:var(--aca-green)}.aca-badge{display:inline-block;padding:.3rem .6rem;border-radius:999px;background:var(--aca-blue-soft);color:var(--aca-blue);font-size:.78rem;font-weight:800;white-space:nowrap}.aca-cert-card{display:flex;flex-direction:column;border-top:4px solid transparent}.aca-cert-card.is-current{border-top-color:var(--aca-blue)}.aca-version,.aca-muted{color:var(--aca-muted)}.aca-exam-list{list-style:none;margin:1rem 0;padding:0;border-top:1px solid var(--aca-line)}.aca-exam-list li{display:flex;justify-content:space-between;gap:1rem;padding:.85rem 0;border-bottom:1px solid var(--aca-line)}.aca-exam-list strong,.aca-exam-list span{display:block}.aca-exam-list span,.aca-exam-list small{color:var(--aca-muted)}.aca-cert-card form{margin-top:auto}.aca-button,.aca-login input[type=submit]{display:inline-block;min-height:44px;padding:.7rem 1.05rem;border:1px solid var(--aca-blue);border-radius:8px;background:var(--aca-blue);color:#fff;text-decoration:none;cursor:pointer;font-weight:700}.aca-button:hover{background:#163eac;color:#fff}.aca-button-secondary{border-color:#b7c6d8;background:#fff;color:var(--aca-navy)}.aca-hero .aca-button-secondary{border-color:#fff}.aca-button-secondary:hover{background:var(--aca-blue-soft);color:var(--aca-navy)}.aca-button:disabled{opacity:.65;cursor:not-allowed}.aca-text-link{font-weight:700;color:var(--aca-blue);text-decoration:none}.aca-notice{margin:1rem 0;padding:.85rem 1rem;border-left:4px solid var(--aca-blue);background:#fff}.aca-notice-success{border-left-color:var(--aca-green)}.aca-empty{text-align:center;padding:2rem}.aca-button:focus,.aca-text-link:focus,.aca-login input:focus{outline:3px solid #93c5fd;outline-offset:2px}@media(max-width:780px){.aca-hero,.aca-current-card{align-items:flex-start;flex-direction:column}.aca-stat-grid{grid-template-columns:repeat(2,1fr)}.aca-exam-list li{flex-direction:column;gap:.25rem}}@media(max-width:440px){.aca-stat-grid{grid-template-columns:1fr}.aca-shell{padding-inline:.5rem}.aca-hero{border-radius:14px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
.aca-quiz-progress{margin-bottom:1rem;font-weight:800;color:var(--aca-blue)}.aca-question{max-width:820px;margin:auto;padding:clamp(1.25rem,4vw,2.5rem)}.aca-question h1{font-size:clamp(1.4rem,3vw,2rem)}.aca-choices{display:grid;gap:.75rem;margin:1.5rem 0;border:0;padding:0}.aca-choices label{display:flex;align-items:flex-start;gap:.75rem;padding:1rem;border:1px solid var(--aca-line);border-radius:10px;cursor:pointer}.aca-choices label:hover{border-color:var(--aca-blue);background:var(--aca-blue-soft)}.aca-choices input{margin-top:.3rem}.aca-feedback{max-width:820px;margin:auto;border-left:5px solid var(--aca-green)}.aca-feedback.is-incorrect{border-left-color:#b42318}.aca-results{text-align:center;padding:2rem}.aca-results h1{font-size:3rem}.aca-review{margin-bottom:1rem}.aca-history{display:grid;gap:.75rem}.aca-history .aca-card{display:flex;justify-content:space-between;gap:1rem;align-items:center}
/* Milestone 5 AI tutor */
.aca-tutor-layout{display:grid;grid-template-columns:minmax(220px,320px) 1fr;gap:24px;align-items:start}.aca-tutor-controls{position:sticky;top:32px}.aca-tutor-controls label{display:block;font-weight:700;margin:0 0 6px}.aca-tutor-controls select{width:100%;margin:0 0 18px}.aca-chat-log{min-height:300px;max-height:560px;overflow:auto;display:flex;flex-direction:column;gap:14px;margin-bottom:18px}.aca-chat-message{max-width:86%;padding:14px 16px;border-radius:14px;white-space:pre-wrap}.aca-chat-message.is-user{align-self:flex-end;background:#2154df;color:#fff}.aca-chat-message.is-assistant{align-self:flex-start;background:#eef3fb;color:#08264a}.aca-chat-form textarea{width:100%;min-height:100px;margin-bottom:12px}.aca-chat-actions{display:flex;gap:10px;flex-wrap:wrap}.aca-chat-status{min-height:24px;margin-top:10px}.aca-chat-status.is-error{color:#b42318}@media(max-width:760px){.aca-tutor-layout{grid-template-columns:1fr}.aca-tutor-controls{position:static}.aca-chat-message{max-width:96%}}

/* Milestone 5B Learning Workspace */
.aca-workspace-header{display:flex;justify-content:space-between;gap:1.5rem;padding:1.5rem;border-radius:18px;background:var(--aca-navy);color:#fff}.aca-workspace-header h1{color:#fff;margin-bottom:.5rem}.aca-workspace-header .aca-eyebrow{color:#bfdbfe}.aca-workspace-meta{display:flex;flex-wrap:wrap;gap:.5rem;align-content:flex-start}.aca-workspace-meta span{padding:.4rem .7rem;border-radius:999px;background:rgba(255,255,255,.14);white-space:nowrap}.aca-jump{margin:1rem 0}.aca-jump label{font-weight:700}.aca-jump select{max-width:680px;width:100%;margin-left:.5rem}.aca-workspace-grid{display:grid;grid-template-columns:220px minmax(0,1fr) 260px;gap:1rem;align-items:start}.aca-workspace-nav,.aca-workspace-tools{position:sticky;top:24px}.aca-workspace-nav ol{padding-left:1.2rem}.aca-workspace-main{min-width:0}.aca-workspace-tabs{display:flex;gap:.35rem;overflow-x:auto;margin-bottom:1rem}.aca-workspace-tabs button{padding:.7rem 1rem;border:1px solid var(--aca-line);border-radius:8px;background:#fff;color:var(--aca-navy);font-weight:700;white-space:nowrap}.aca-workspace-tabs button[aria-selected=true]{background:var(--aca-blue);color:#fff}.aca-workspace-split{display:grid;grid-template-columns:minmax(0,1fr) minmax(300px,.85fr);gap:1rem}.aca-lesson-pane article+article{border-top:1px solid var(--aca-line);margin-top:1.5rem;padding-top:1.5rem}.aca-tutor-pane label,.aca-tutor-pane select{display:block;width:100%;margin-bottom:.75rem}.aca-workspace-main>[data-workspace-pane]{margin-bottom:1rem}.aca-workspace-tools{display:grid;gap:1rem}.aca-workspace-tools ul{padding-left:1.2rem}.aca-workspace textarea{width:100%;margin-bottom:.75rem}@media(max-width:1050px){.aca-workspace-grid{grid-template-columns:180px minmax(0,1fr)}.aca-workspace-tools{position:static;grid-column:1/-1;grid-template-columns:repeat(2,1fr)}}@media(max-width:760px){.aca-workspace-header{flex-direction:column}.aca-jump select{display:block;margin:.4rem 0 0}.aca-workspace-grid{grid-template-columns:1fr}.aca-workspace-nav{display:none}.aca-workspace-split{grid-template-columns:1fr}.aca-workspace-tools{grid-template-columns:1fr}.aca-workspace-tabs button[data-workspace-tab=split]{display:none}}

/* Structured Lesson Engine */
.aca-workspace-nav li{margin-bottom:.7rem}.aca-workspace-nav li small{display:block;color:var(--aca-muted)}.aca-workspace-nav li.is-current>a{font-weight:800;color:var(--aca-blue)}.aca-workspace-nav li.is-complete>a{color:var(--aca-green)}.aca-learning-object{position:relative;margin:1rem 0;padding:1rem;border:1px solid var(--aca-line);border-radius:10px;background:#fff}.aca-learning-object h4{margin-bottom:.65rem}.aca-object-exam_tip,.aca-object-definition{border-left:5px solid var(--aca-blue);background:var(--aca-blue-soft)}.aca-object-common_mistake,.aca-object-warning{border-left:5px solid #b42318;background:#fff4f2}.aca-object-callout,.aca-object-example{border-left:5px solid #b7791f;background:#fffbeb}.aca-learning-object pre{overflow:auto;padding:1rem;border-radius:8px;background:#102a43;color:#f8fafc}.aca-learning-object img{max-width:100%;height:auto}.aca-object-actions{display:flex;align-items:center;gap:.75rem;flex-wrap:wrap;margin-top:.8rem;padding-top:.7rem;border-top:1px solid var(--aca-line)}.aca-object-actions form{margin:0}.aca-object-actions button.aca-text-link{border:0;background:transparent;padding:0;cursor:pointer}.aca-object-actions details{width:100%}.aca-object-actions details textarea{display:block;width:100%;margin:.5rem 0}.aca-section-complete{margin:1rem 0 2rem}.aca-lesson-pane article{scroll-margin-top:30px}