:root{--paper:#eef2ef;--paper-card:#fff;--grid-line:#122a3a12;--ink:#122a3a;--ink-soft:#47607a;--ink-faint:#8098ab;--line:#dde5e2;--teal:#146b63;--teal-deep:#0e4a45;--teal-tint:#e3efec;--gold:#b4872a;--gold-tint:#f7ecd4;--red:#b23a2b;--red-tint:#fbeae7;--font-display:"Fraunces", ui-serif, Georgia, serif;--font-body:"Manrope", system-ui, -apple-system, "Segoe UI", sans-serif;--font-mono:"IBM Plex Mono", ui-monospace, monospace;--radius:14px;--shadow:0 10px 30px #122a3a14}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition-duration:.001ms!important;animation-duration:.001ms!important;animation-iteration-count:1!important}}body{font-family:var(--font-body);background:linear-gradient(var(--grid-line) 1px, transparent 1px), linear-gradient(90deg, var(--grid-line) 1px, transparent 1px), var(--paper);color:var(--ink);background-size:28px 28px,28px 28px,auto;line-height:1.6}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer}h1,h2,h3{font-family:var(--font-display);color:var(--ink);letter-spacing:-.01em}:focus-visible{outline:2px solid var(--teal);outline-offset:3px;border-radius:4px}.eyebrow{font-family:var(--font-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--teal-deep);align-items:center;gap:8px;font-size:.72rem;font-weight:600;display:inline-flex}.eyebrow:before{content:"";background:var(--gold);width:18px;height:1px}main{max-width:1100px;min-height:calc(100vh - 140px);margin:0 auto;padding:24px}section{background:var(--paper-card);border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow);margin-bottom:20px;padding:28px}h2{margin-bottom:8px;font-size:1.6rem}.navbar{z-index:1000;background:var(--ink);color:#fff;border-bottom:3px solid var(--gold);justify-content:space-between;align-items:center;gap:12px;padding:14px 24px;display:flex;position:sticky;top:0}.navbar__brand a{font-family:var(--font-display);color:#fff;align-items:baseline;gap:8px;font-size:1.35rem;font-weight:600;display:flex}.navbar__brand-mark{font-family:var(--font-mono);color:var(--gold);letter-spacing:.08em;font-size:.65rem;font-weight:600}.navbar__toggle{color:#fff;font-family:var(--font-mono);background:0 0;border:1px solid #ffffff40;border-radius:8px;padding:8px 10px;font-size:.85rem;display:none}.navbar__links{flex-wrap:wrap;gap:22px;display:flex}.navbar__links a{color:#cfe3df;border-bottom:2px solid #0000;padding-bottom:2px;font-size:.92rem;font-weight:600;transition:color .2s}.navbar__links a:hover{color:#fff}.navbar__links a.active{color:var(--gold);border-bottom-color:var(--gold)}@media (width<=780px){.navbar__toggle{display:inline-flex}.navbar__links{flex-direction:column;gap:14px;width:100%;padding-top:14px;display:none}.navbar__links.is-open{display:flex}}.hero-section{grid-template-columns:1.1fr 1fr;align-items:center;gap:40px;padding:48px;display:grid}.hero-copy h1{margin:14px 0 16px;font-size:clamp(2rem,4vw,2.9rem);line-height:1.1}.hero-copy h1 em{color:var(--teal);font-style:italic}.hero-copy p{max-width:480px;color:var(--ink-soft);margin-bottom:26px;font-size:1.05rem}.hero-actions{flex-wrap:wrap;align-items:center;gap:20px;display:flex}.hero-cta{background:var(--teal);color:#fff;border-radius:999px;padding:13px 26px;font-weight:700;transition:background .2s,transform .2s;display:inline-block}.hero-cta:hover{background:var(--teal-deep);transform:translateY(-1px)}.hero-secondary{color:var(--ink);border-bottom:1px solid var(--ink-faint);padding-bottom:2px;font-weight:600}.hero-secondary:hover{border-color:var(--ink)}.hero-graphic{background:var(--paper-card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}.hero-graphic svg{width:100%;height:auto;display:block}.curve-path{fill:none;stroke-width:3px;stroke-linecap:round;stroke-dasharray:420;stroke-dashoffset:420px;animation:1.4s ease-out forwards draw-curve}.curve-path--demand{stroke:var(--teal);animation-delay:.15s}.curve-path--supply{stroke:var(--gold);animation-delay:.45s}@keyframes draw-curve{to{stroke-dashoffset:0}}.curve-point{fill:var(--ink);opacity:0;animation:.4s ease-out 1.4s forwards pop-in}@keyframes pop-in{0%{opacity:0;transform:scale(.4)}to{opacity:1;transform:scale(1)}}.curve-label{font-family:var(--font-mono);fill:var(--ink-soft);font-size:11px}@media (prefers-reduced-motion:reduce){.curve-path{stroke-dashoffset:0;animation:none}.curve-point{opacity:1;animation:none}}@media (width<=860px){.hero-section{text-align:left;grid-template-columns:1fr;padding:32px 24px}.hero-copy p{max-width:none}}.levels-grid{grid-template-columns:repeat(3,1fr);align-items:end;gap:20px;margin-top:24px;display:grid}.level-card{background:var(--paper-card);border:1px solid var(--line);border-top:3px solid var(--gold);border-radius:var(--radius);padding:22px 20px 20px;transition:transform .2s,box-shadow .2s;display:block;position:relative}.levels-grid .level-card:first-child{transform:translateY(28px)}.levels-grid .level-card:nth-child(2){transform:translateY(14px)}.level-card:hover{box-shadow:var(--shadow);transform:translateY(-4px)}.levels-grid .level-card:first-child:hover{transform:translateY(24px)}.levels-grid .level-card:nth-child(2):hover{transform:translateY(10px)}.level-card__number{font-family:var(--font-mono);color:var(--gold);letter-spacing:.08em;margin-bottom:10px;font-size:.75rem;font-weight:600;display:block}.level-card h3{margin-bottom:8px;font-size:1.15rem}.level-card p{color:var(--ink-soft);margin-bottom:14px;font-size:.93rem}.level-card__count{font-family:var(--font-mono);color:var(--teal-deep);font-size:.78rem;font-weight:600}.level-group{margin-top:24px}.level-group__title{color:var(--ink);border-bottom:2px solid var(--line);margin-bottom:16px;padding-bottom:8px;font-size:1.1rem}@media (width<=780px){.levels-grid{grid-template-columns:1fr}.levels-grid .level-card:first-child,.levels-grid .level-card:nth-child(2),.levels-grid .level-card:nth-child(3){transform:none}}.subjects-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;margin-top:12px;display:grid}.subject-card{background:var(--paper-card);border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--line);padding:20px;transition:transform .2s,border-color .2s;display:block}.subject-card:hover{border-color:var(--teal);transform:translateY(-3px)}.subject-card__bar{border-radius:999px;width:50px;height:6px;margin-bottom:12px}.subject-card h3{margin-bottom:8px;font-size:1.1rem}.subject-card p{color:var(--ink-soft);font-size:.95rem}.subject-header{align-items:flex-start;gap:16px;margin-bottom:20px;display:flex}.subject-header__bar{border-radius:999px;align-self:stretch;width:8px;min-height:60px}.subject-header__level{font-family:var(--font-mono);color:var(--teal-deep);background:var(--teal-tint);border-radius:999px;margin-top:8px;padding:4px 10px;font-size:.78rem;font-weight:600;display:inline-block}.tabs{border-bottom:1px solid var(--line);flex-wrap:wrap;gap:8px;margin-bottom:20px;display:flex}.tab{color:var(--ink-faint);background:0 0;border:none;border-bottom:3px solid #0000;padding:10px 6px;font-weight:600}.tab:hover{color:var(--teal)}.tab--active{color:var(--teal);border-bottom-color:var(--teal)}.empty-state{color:var(--ink-faint);font-style:italic}.notes-search{background:var(--paper);border:1px solid var(--line);border-radius:10px;flex-wrap:wrap;gap:12px;margin:20px 0 8px;padding:16px;display:flex}.notes-search__input{border:1px solid var(--line);font:inherit;background:var(--paper-card);color:var(--ink);border-radius:8px;flex:220px;padding:10px 14px}.notes-search select{border:1px solid var(--line);font:inherit;background:var(--paper-card);color:var(--ink);border-radius:8px;padding:10px 12px}.notes-search-results__header{font-family:var(--font-mono);color:var(--ink-soft);justify-content:space-between;align-items:center;margin:20px 0 12px;font-size:.85rem;display:flex}.notes-search-clear{border:1px solid var(--line);color:var(--teal);background:0 0;border-radius:999px;padding:6px 14px;font-weight:600}.notes-search-clear:hover{border-color:var(--teal)}.no-results{text-align:center;border:1px dashed var(--line);border-radius:12px;padding:32px 20px}.no-results__prompt{color:var(--ink-soft);margin-top:6px;font-size:.95rem}.no-results__cta{background:var(--teal);color:#fff;border-radius:999px;margin-top:14px;padding:10px 22px;font-size:.9rem;font-weight:700;transition:background .2s;display:inline-block}.no-results__cta:hover{background:var(--teal-deep)}.subject-notes-section{margin-bottom:28px}.subject-notes-section__header{align-items:center;gap:10px;margin-bottom:12px;display:flex}.subject-notes-section__bar{border-radius:999px;width:6px;height:20px}.subject-notes-section__header h4{font-family:var(--font-display);font-size:1.05rem}.see-more-link{color:var(--teal);margin-top:10px;font-size:.9rem;font-weight:700;display:inline-block}.see-more-link:hover{color:var(--teal-deep)}.note-card-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px;display:grid}.note-card{border:1px solid var(--line);background:var(--paper-card);border-radius:12px;transition:transform .2s,box-shadow .2s;overflow:hidden}.note-card:hover{box-shadow:var(--shadow);transform:translateY(-3px)}.note-card__header{text-align:left;background:0 0;border:none;width:100%;padding:0;display:block}.note-card__image{aspect-ratio:16/9;object-fit:cover;background:var(--teal-tint);width:100%;display:block}.note-card__image--placeholder{color:#fff;font-family:var(--font-display);justify-content:center;align-items:center;font-size:2rem;font-weight:600;display:flex}.note-card__body{padding:14px 16px}.note-card__date{font-family:var(--font-mono);color:var(--ink-faint);font-size:.72rem}.note-card__body h3{margin:6px 0;font-size:1rem}.note-card__summary{color:var(--ink-soft);font-size:.88rem}.note-card__expanded{border-top:1px solid var(--line);color:#334155;margin-top:4px;padding:12px 16px 16px}.note-card__tag{font-family:var(--font-mono);color:var(--teal-deep);margin:0 16px 14px;font-size:.72rem;font-weight:600;display:inline-block}@media (width<=780px){.notes-search{flex-direction:column}}.note-item__tag{font-family:var(--font-mono);color:var(--teal-deep);margin-top:10px;font-size:.75rem;font-weight:600;display:inline-block}.blogs-list{flex-direction:column;gap:16px;display:flex}.blog-item{border:1px solid var(--line);border-radius:10px;padding:16px}.blog-item__date{font-family:var(--font-mono);color:var(--ink-faint);margin:4px 0 8px;font-size:.82rem}.quizzes-list{flex-direction:column;gap:24px;display:flex}.quiz-card{border:1px solid var(--line);border-radius:10px;padding:20px}.quiz-question{margin-top:16px}.quiz-question__text{margin-bottom:8px;font-weight:700}.quiz-options{flex-direction:column;gap:8px;display:flex}.quiz-option{text-align:left;border:1px solid var(--line);background:var(--paper);color:var(--ink);border-radius:8px;padding:10px 14px;transition:border-color .2s,background .2s}.quiz-option:hover:not(:disabled){border-color:var(--teal)}.quiz-option--selected{border-color:var(--teal);background:var(--teal-tint)}.quiz-option--correct{border-color:var(--teal);background:var(--teal-tint);color:var(--teal-deep)}.quiz-option--incorrect{border-color:var(--red);background:var(--red-tint);color:var(--red)}.quiz-actions{margin-top:20px}.quiz-submit{background:var(--teal);color:#fff;border:none;border-radius:8px;padding:10px 20px;font-weight:700}.quiz-submit:disabled{background:var(--ink-faint);cursor:not-allowed}.quiz-score{margin-bottom:12px;font-weight:700}.videos-list{flex-direction:column;gap:20px;display:flex}.video-item{border:1px solid var(--line);border-radius:10px;padding:16px}.video-embed{border-radius:8px;margin-top:12px;padding-top:56.25%;position:relative;overflow:hidden}.video-embed iframe{border:none;width:100%;height:100%;position:absolute;inset:0}.back-link{color:var(--teal);margin-top:16px;font-weight:700;display:inline-block}.footer{background:var(--ink);color:#cfe3df;text-align:center;border-top:3px solid var(--gold);padding:22px 24px}.footer__note{font-family:var(--font-mono);color:#7d97a8;margin-top:4px;font-size:.8rem}