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100%);-webkit-background-clip:text;background-clip:text}.home-landing__sub{color:var(--text-muted);max-width:56ch;margin:0;font-size:clamp(1.05rem,1.6vw,1.25rem);line-height:1.55}.home-landing__cta-row{flex-wrap:wrap;justify-content:center;gap:.75rem;margin-top:.75rem;display:flex}.home-landing__cta{box-sizing:border-box;border-radius:12px;justify-content:center;align-items:center;gap:.5rem;min-height:52px;padding:.7rem 1.75rem;font-size:1rem;font-weight:700;text-decoration:none;transition:filter .15s,transform .15s,background .15s,border-color .15s,color .15s;display:inline-flex}.home-landing__cta:hover{text-decoration:none;transform:translateY(-1px)}.home-landing__cta:active{transform:translateY(0)}.home-landing__cta--primary{color:#fff;background:linear-gradient(135deg,#059669 0%,#10b981 50%,#14b8a6 100%);border:none;box-shadow:inset 0 1px #ffffff38,0 0 0 1px #05966973,0 10px 32px #10b98159}.home-landing__cta--primary:hover{filter:brightness(1.07);color:#fff}.home-landing__cta--primary svg{transition:transform .18s}.home-landing__cta--primary:hover svg{transform:translate(2px)}.home-landing__cta--ghost{background:var(--surface);border:1px solid var(--border-hover);color:var(--text-h)}.home-landing__cta--ghost:hover{border-color:var(--hl-emerald);color:var(--hl-emerald-deep);background:var(--surface)}@supports (color:color-mix(in lab, red, red)){.home-landing__cta--ghost:hover{background:color-mix(in oklab, var(--surface) 88%, var(--hl-emerald) 12%)}}[data-theme=dark] .home-landing__cta--ghost:hover{color:var(--hl-emerald)}@media (prefers-reduced-motion:reduce){.home-landing__cta:hover,.home-landing__cta:active,.home-landing__cta--primary:hover svg{transform:none}}.home-landing__samples-link{color:var(--accent);text-underline-offset:3px;align-items:center;gap:.4rem;margin-top:.5rem;font-size:.9375rem;font-weight:600;text-decoration:underline;display:inline-flex}.home-landing__samples-link:hover{opacity:.8}.home-landing__samples-link svg{width:14px;height:14px;transition:transform .18s}.home-landing__samples-link:hover svg{transform:translate(2px)}@media (prefers-reduced-motion:reduce){.home-landing__samples-link:hover svg{transform:none}}.home-landing__features{z-index:1;box-sizing:border-box;flex-direction:column;gap:clamp(1.25rem,2.5vw,1.75rem);width:100%;max-width:920px;margin:0 auto;padding:clamp(2rem,5vw,3.5rem) clamp(1rem,5vw,3rem) clamp(3rem,6vw,5rem);display:flex;position:relative}.home-landing__feature-card{--fc-tone:var(--hl-emerald);--fc-tone-deep:var(--hl-emerald-deep);border:1px solid var(--border);background:var(--surface);border-radius:20px;grid-template-columns:1fr;gap:1.25rem;padding:clamp(1.25rem,3vw,2rem);transition:box-shadow .2s,border-color .2s,transform .2s;display:grid;position:relative;overflow:hidden;box-shadow:0 1px 2px #0f172a0a,0 4px 14px #0f172a0a}@media (width>=720px){.home-landing__feature-card{grid-template-columns:1.1fr 1fr;align-items:center;gap:clamp(1.5rem,3vw,2.25rem);padding:clamp(1.5rem,3vw,2rem)}.home-landing__feature-card:nth-child(2n)>.hl-visual{grid-area:1/2}.home-landing__feature-card:nth-child(2n)>.home-landing__feature-text{grid-area:1/1}}.home-landing__feature-text{flex-direction:column;gap:.75rem;display:flex}.home-landing__feature-card:before{content:"";pointer-events:none;opacity:0;background:linear-gradient(135deg, var(--fc-tone) 0%, transparent 60%);position:absolute;inset:0}@supports (color:color-mix(in lab, red, red)){.home-landing__feature-card:before{background:linear-gradient(135deg, color-mix(in oklab, var(--fc-tone) 8%, transparent) 0%, transparent 60%)}}.home-landing__feature-card:before{transition:opacity .25s}.home-landing__feature-card:hover{border-color:var(--fc-tone)}@supports (color:color-mix(in lab, red, red)){.home-landing__feature-card:hover{border-color:color-mix(in oklab, var(--fc-tone) 35%, var(--border))}}.home-landing__feature-card:hover{box-shadow:0 1px 2px #0f172a0a, 0 12px 32px var(--fc-tone)}@supports (color:color-mix(in lab, red, red)){.home-landing__feature-card:hover{box-shadow:0 1px 2px #0f172a0a, 0 12px 32px color-mix(in oklab, var(--fc-tone) 14%, #0f172a14)}}.home-landing__feature-card:hover{transform:translateY(-3px)}.home-landing__feature-card:hover:before{opacity:1}.home-landing__feature-card--emerald{--fc-tone:var(--hl-emerald);--fc-tone-deep:var(--hl-emerald-deep)}.home-landing__feature-card--amber{--fc-tone:var(--hl-amber);--fc-tone-deep:var(--hl-amber-deep)}.home-landing__feature-card--sky{--fc-tone:var(--hl-sky);--fc-tone-deep:var(--hl-sky-deep)}[data-theme=dark] .home-landing__feature-card{background:var(--surface)}@supports (color:color-mix(in lab, red, red)){[data-theme=dark] .home-landing__feature-card{background:color-mix(in oklab, var(--surface) 92%, var(--hl-emerald) 0%)}}[data-theme=dark] .home-landing__feature-card{box-shadow:inset 0 1px #ffffff05,0 1px 3px #00000059}[data-theme=dark] .home-landing__feature-card:hover{background:var(--surface)}@supports (color:color-mix(in lab, red, red)){[data-theme=dark] .home-landing__feature-card:hover{background:color-mix(in oklab, var(--surface) 80%, var(--fc-tone) 4%)}}[data-theme=dark] .home-landing__feature-card:hover{box-shadow:0 1px 0 #ffffff08 inset, 0 16px 40px var(--fc-tone)}@supports (color:color-mix(in lab, red, red)){[data-theme=dark] .home-landing__feature-card:hover{box-shadow:0 1px 0 #ffffff08 inset, 0 16px 40px color-mix(in oklab, var(--fc-tone) 18%, #0006)}}@media (prefers-reduced-motion:reduce){.home-landing__feature-card:hover{transform:none}}.home-landing__feature-title{color:var(--text-h);letter-spacing:-.02em;margin:0;font-size:clamp(1.2rem,2vw,1.45rem);font-weight:700;line-height:1.25}.home-landing__feature-desc{color:var(--text-muted);margin:0;font-size:clamp(.925rem,1.2vw,1rem);line-height:1.55}.hl-visual{aspect-ratio:5/3;border:1px solid var(--fc-tone);border-radius:14px;width:100%;min-height:220px;padding:1rem;position:relative}@supports (color:color-mix(in lab, red, red)){.hl-visual{border:1px solid color-mix(in oklab, var(--fc-tone) 18%, var(--border))}}.hl-visual{background:linear-gradient(155deg, var(--fc-tone) 0%, var(--surface) 80%)}@supports (color:color-mix(in lab, red, red)){.hl-visual{background:linear-gradient(155deg, color-mix(in oklab, var(--fc-tone) 9%, var(--surface)) 0%, var(--surface) 80%)}}.hl-visual{box-sizing:border-box;overflow:hidden}@media (width>=720px){.hl-visual{aspect-ratio:16/10;min-height:220px}}[data-theme=dark] .hl-visual{background:linear-gradient(155deg, var(--fc-tone) 0%, var(--page-bg) 85%)}@supports (color:color-mix(in lab, red, red)){[data-theme=dark] .hl-visual{background:linear-gradient(155deg, color-mix(in oklab, var(--fc-tone) 14%, var(--page-bg)) 0%, var(--page-bg) 85%)}}.hl-visual--tests{padding:0}.hl-visual__paper{border:1px solid var(--fc-tone);border-radius:12px;width:64%;position:absolute;top:10%;bottom:10%;left:18%}@supports (color:color-mix(in lab, red, red)){.hl-visual__paper{border:1px solid color-mix(in oklab, var(--fc-tone) 25%, var(--border))}}.hl-visual__paper{background:var(--surface);box-shadow:0 8px 26px var(--fc-tone)}@supports (color:color-mix(in lab, red, red)){.hl-visual__paper{box-shadow:0 8px 26px color-mix(in oklab, var(--fc-tone) 16%, #0f172a1a)}}.hl-visual__paper--back{opacity:.55;transform:rotate(-7deg)translate(-26%)}.hl-visual__paper--mid{opacity:.78;transform:rotate(4deg)translate(22%)}.hl-visual__paper--front{z-index:2;flex-direction:column;justify-content:center;gap:.7rem;padding:1rem 1.15rem;display:flex}[data-theme=dark] .hl-visual__paper{background:var(--surface)}@supports (color:color-mix(in lab, red, red)){[data-theme=dark] .hl-visual__paper{background:color-mix(in oklab, var(--surface) 92%, var(--fc-tone) 8%)}}.hl-visual__paper-head{justify-content:space-between;align-items:center;margin-bottom:.25rem;display:flex}.hl-visual__paper-badge{font-variant-numeric:tabular-nums;letter-spacing:.02em;color:var(--fc-tone-deep);background:var(--fc-tone);border-radius:999px;align-items:center;padding:.2rem .6rem;font-size:.78rem;font-weight:700;display:inline-flex}@supports (color:color-mix(in lab, red, red)){.hl-visual__paper-badge{background:color-mix(in oklab, var(--fc-tone) 16%, var(--surface))}}.hl-visual__paper-badge{border:1px solid var(--fc-tone)}@supports (color:color-mix(in lab, red, red)){.hl-visual__paper-badge{border:1px solid color-mix(in oklab, var(--fc-tone) 28%, transparent)}}.hl-visual__paper-dot{background:var(--fc-tone);border-radius:999px;width:8px;height:8px}@supports (color:color-mix(in lab, red, red)){.hl-visual__paper-dot{background:color-mix(in oklab, var(--fc-tone) 70%, var(--border-hover))}}.hl-visual__row{align-items:center;gap:.6rem;display:flex}.hl-visual__bullet{border-radius:999px;flex-shrink:0;justify-content:center;align-items:center;width:20px;height:20px;font-size:.7rem;font-weight:700;display:inline-flex}.hl-visual__bullet--ok{background:var(--hl-emerald)}@supports (color:color-mix(in lab, red, red)){.hl-visual__bullet--ok{background:color-mix(in oklab, var(--hl-emerald) 18%, var(--surface))}}.hl-visual__bullet--ok{color:var(--hl-emerald-deep);border:1px solid var(--hl-emerald)}@supports (color:color-mix(in lab, red, red)){.hl-visual__bullet--ok{border:1px solid color-mix(in oklab, var(--hl-emerald) 35%, transparent)}}.hl-visual__bullet--miss{background:#ef4444}@supports (color:color-mix(in lab, red, red)){.hl-visual__bullet--miss{background:color-mix(in oklab, #ef4444 16%, var(--surface))}}.hl-visual__bullet--miss{color:#b91c1c;border:1px solid oklab(63.6834% .187864 .0889286/.38)}.hl-visual__line{background:var(--text);border-radius:999px;height:9px}@supports (color:color-mix(in lab, red, red)){.hl-visual__line{background:color-mix(in oklab, var(--text) 14%, var(--border))}}[data-theme=dark] .hl-visual__bullet--ok{color:#6ee7b7}[data-theme=dark] .hl-visual__bullet--miss{color:#fca5a5}[data-theme=dark] .hl-visual__line{background:var(--text-muted)}@supports (color:color-mix(in lab, red, red)){[data-theme=dark] .hl-visual__line{background:color-mix(in oklab, var(--text-muted) 22%, transparent)}}.hl-visual--chart{text-align:left;flex-direction:column;justify-content:center;gap:.85rem;padding:1.4rem 1.25rem;display:flex}.hl-chart-row{flex-direction:column;gap:.35rem;display:flex}.hl-chart-row__head{justify-content:space-between;align-items:baseline;gap:.5rem;display:flex}.hl-chart-row__label{color:var(--text-h);white-space:nowrap;font-size:.78rem;font-weight:600}.hl-chart-row__value{font-variant-numeric:tabular-nums;color:var(--text-h);font-size:.75rem;font-weight:700}.hl-chart-row__track{background:var(--text);border-radius:999px;width:100%;height:12px}@supports (color:color-mix(in lab, red, red)){.hl-chart-row__track{background:color-mix(in oklab, var(--text) 8%, var(--border))}}.hl-chart-row__track{overflow:hidden}.hl-chart-row__fill{border-radius:999px;height:100%}.hl-chart-row__fill--good{background:linear-gradient(90deg,#10b981,#059669)}.hl-chart-row__fill--mid{background:linear-gradient(90deg,#f59e0b,#d97706)}.hl-chart-row__fill--low{background:linear-gradient(90deg,#f87171,#dc2626)}.hl-visual--group{flex-direction:column;justify-content:center;gap:.5rem;padding:.85rem 1rem;display:flex}.hl-group-row{background:var(--surface);border:1px solid var(--border);border-radius:10px;align-items:center;gap:.7rem;padding:.45rem .7rem;display:flex}.hl-group-row--teacher{background:var(--fc-tone)}@supports (color:color-mix(in lab, red, red)){.hl-group-row--teacher{background:color-mix(in oklab, var(--fc-tone) 12%, var(--surface))}}.hl-group-row--teacher{border-color:var(--fc-tone)}@supports (color:color-mix(in lab, red, red)){.hl-group-row--teacher{border-color:color-mix(in oklab, var(--fc-tone) 30%, var(--border))}}[data-theme=dark] .hl-group-row{background:var(--surface)}@supports (color:color-mix(in lab, red, red)){[data-theme=dark] .hl-group-row{background:color-mix(in oklab, var(--surface) 90%, var(--fc-tone) 4%)}}[data-theme=dark] .hl-group-row--teacher{background:var(--fc-tone)}@supports (color:color-mix(in lab, red, red)){[data-theme=dark] .hl-group-row--teacher{background:color-mix(in oklab, var(--fc-tone) 16%, var(--surface))}}.hl-avatar{color:#fff;border-radius:999px;flex-shrink:0;justify-content:center;align-items:center;width:32px;height:32px;font-size:.875rem;font-weight:700;display:inline-flex}.hl-avatar--teacher{background:linear-gradient(135deg,#0ea5e9,#0369a1)}.hl-avatar--s1{background:linear-gradient(135deg,#f472b6,#be185d)}.hl-avatar--s2{background:linear-gradient(135deg,#a78bfa,#6d28d9)}.hl-avatar--s3{background:linear-gradient(135deg,#34d399,#047857)}.hl-group-row__meta{flex:1;justify-content:space-between;align-items:center;gap:.4rem;min-width:0;display:flex}.hl-group-row__name{color:var(--text-h);white-space:nowrap;text-overflow:ellipsis;font-size:.875rem;font-weight:600;overflow:hidden}.hl-group-row__role{letter-spacing:.04em;text-transform:uppercase;color:var(--fc-tone-deep);background:var(--fc-tone);border-radius:999px;padding:.15rem .55rem;font-size:.7rem;font-weight:700}@supports (color:color-mix(in lab, red, red)){.hl-group-row__role{background:color-mix(in oklab, var(--fc-tone) 18%, var(--surface))}}.hl-group-row__role{flex-shrink:0}[data-theme=dark] .hl-group-row__role{color:var(--fc-tone)}@supports (color:color-mix(in lab, red, red)){[data-theme=dark] .hl-group-row__role{color:color-mix(in oklab, var(--fc-tone) 70%, #fff)}}.home-landing__footer{z-index:1;border-top:1px solid var(--border);background:var(--surface);padding:1.5rem clamp(1rem,5vw,3rem);position:relative}@supports (color:color-mix(in lab, red, red)){.home-landing__footer{background:color-mix(in oklab, var(--surface) 70%, var(--page-bg) 30%)}}.home-landing__footer-inner{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.75rem;max-width:1100px;margin:0 auto;display:flex}.home-landing__footer-logo{opacity:.85;width:auto;height:24px;display:block}.home-landing__footer-rights{color:var(--text-muted);font-size:.8125rem}.home-landing__footer-links{flex-wrap:wrap;align-items:center;gap:1.25rem;display:flex}.home-landing__footer-link{font-size:.8125rem}.free-samples__hero{gap:.85rem}.free-samples__hero .home-landing__headline{font-size:clamp(2rem,4.5vw,3.25rem)}.free-samples__list{z-index:1;width:100%;max-width:880px;box-shadow:none;box-sizing:border-box;background:0 0;border:none;border-radius:0;flex-direction:column;gap:clamp(1.25rem,2.5vw,1.75rem);margin:0 auto 2rem;padding:0 clamp(1rem,5vw,3rem);display:flex;position:relative}.free-samples__cta{text-align:center;border:1px solid var(--hl-emerald);border-radius:20px;flex-direction:column;align-items:center;gap:.85rem;margin-top:clamp(.5rem,2vw,1.5rem);padding:clamp(2rem,4vw,3rem) clamp(1.25rem,3vw,2.5rem);display:flex}@supports (color:color-mix(in lab, red, red)){.free-samples__cta{border:1px solid color-mix(in oklab, var(--hl-emerald) 35%, var(--border))}}.free-samples__cta{background:radial-gradient(ellipse 90% 130% at 50% 0%, var(--hl-emerald), transparent 70%), var(--surface)}@supports (color:color-mix(in lab, red, red)){.free-samples__cta{background:radial-gradient(ellipse 90% 130% at 50% 0%, color-mix(in oklab, var(--hl-emerald) 12%, transparent), transparent 70%), var(--surface)}}.free-samples__cta{box-shadow:0 1px 2px #0f172a0a,0 10px 30px #10b98114}.free-samples__cta-title{letter-spacing:-.02em;color:var(--text-h);margin:0;font-size:clamp(1.35rem,2.5vw,1.8rem);font-weight:800}.free-samples__cta-desc{max-width:48ch;color:var(--text-muted);margin:0;font-size:1rem;line-height:1.55}.free-samples__cta .home-landing__cta{margin-top:.5rem}.free-samples__exercise{border:1px solid var(--border);border-radius:var(--radius-md);background:var(--surface);flex-direction:column;display:flex;overflow:hidden}.free-samples__exercise-head{border-bottom:1px solid var(--border);padding:14px 20px}.free-samples__exercise-num{letter-spacing:.04em;text-transform:uppercase;color:var(--text-muted);font-size:.75rem;font-weight:700}.free-samples__exercise-body{gap:var(--space-3);padding:var(--space-4) var(--space-5);flex-direction:column;display:flex}.free-samples__exercise-solution{border-top:1px solid var(--border);background:var(--code-bg);flex-direction:column;display:flex}.free-samples__exercise-solution-item{padding:var(--space-3) var(--space-5);flex-direction:column;gap:4px;font-size:.875rem;display:flex}.free-samples__exercise-solution-item+.free-samples__exercise-solution-item{border-top:1px solid 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