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strong{font-family:var(--font-display);font-size:var(--fs-lg)}.chat-shell__who span{font-size:var(--fs-xs);color:var(--c-ink-2)}.chat-shell__actions{gap:var(--s-2);display:flex}.chat-ch{padding:var(--s-2) var(--s-3) var(--s-4);flex-direction:column;gap:2px;min-height:0;display:flex;overflow-y:auto}.chat-ch__list{flex-direction:column;gap:2px;margin:0;padding:0;list-style:none;display:flex}.chat-ch__item{align-items:center;gap:var(--s-3);border-radius:var(--r-md);width:100%;color:var(--c-ink);text-align:left;transition:background-color var(--dur-micro) var(--ease-out);background:0 0;border:none;padding:8px 10px;display:flex}.chat-ch__item:hover{background:var(--c-surface-2)}.chat-ch__item.is-active{background:var(--c-primary-soft);box-shadow:inset 0 0 0 1.5px color-mix(in srgb, var(--c-primary) 40%, transparent)}.chat-ch__item:not(.is-online):not(.chat-ch__item--family) .chat-ch__name{color:var(--c-ink-2)}.chat-ch__family-art{background:var(--c-olive-soft);width:38px;height:38px;box-shadow:var(--gloss-top);border-radius:12px;flex:none;place-items:center;display:grid}.chat-ch__family-art--lg{width:44px;height:44px}.chat-ch__text{flex-direction:column;flex:auto;min-width:0;line-height:1.3;display:flex}.chat-ch__name{white-space:nowrap;text-overflow:ellipsis;font-weight:600;overflow:hidden}.chat-ch__item--family .chat-ch__name{font-weight:700}.chat-ch__sub{font-size:var(--fs-xs);color:var(--c-ink-2)}.chat-ch__unread{border-radius:var(--r-pill);background:var(--c-red);min-width:22px;height:22px;color:var(--c-on-red);font-size:var(--fs-xs);flex:none;place-items:center;padding:0 7px;font-weight:800;display:grid}.chat-ch__group{padding:var(--s-3) 10px 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14px;font-weight:600}.chat-row{align-items:flex-end;gap:var(--s-2);max-width:78%;display:flex}.chat-row.is-last{margin-bottom:var(--s-2)}.chat-row.is-mine{flex-direction:row-reverse;align-self:flex-end}.chat-row__avatar{flex:none;width:32px}.chat-row__stack{flex-direction:column;align-items:flex-start;min-width:0;display:flex}.chat-row.is-mine .chat-row__stack{align-items:flex-end}.chat-row__name{font-size:var(--fs-xs);color:var(--c-ink-2);margin:0 0 2px 12px;font-weight:700}.chat-row__time{color:var(--c-ink-2);margin:2px 10px 0;font-size:.6875rem}.chat-bubble2{background:var(--c-surface);border:1px solid var(--c-line);box-shadow:0 1px 0 rgba(var(--shadow-rgb), .04);white-space:pre-wrap;overflow-wrap:anywhere;animation:ds-rise-in .2s var(--ease-out);border-radius:18px;padding:9px 14px;line-height:1.45;position:relative}.chat-row:not(.is-mine) .chat-row__stack .chat-bubble2{border-bottom-left-radius:6px}.chat-row.is-mine 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var(--rise-delay,0s) both;flex-direction:column;flex:1 1 0;display:flex}.pg-podium__player{text-align:center;flex-direction:column;align-items:center;gap:4px;min-width:0;max-width:100%;display:flex}.pg-podium__name{text-overflow:ellipsis;white-space:nowrap;align-items:center;gap:6px;max-width:100%;display:inline-flex;overflow:hidden}.pg-podium__score{font-family:var(--font-display);font-weight:800;font-size:var(--fs-xl);line-height:1}.pg-podium__score small{font-size:var(--fs-xs);color:var(--c-ink-2)}.pg-podium__block{width:100%;padding-top:var(--s-3);border-radius:var(--r-md) var(--r-md) var(--r-sm) var(--r-sm);background:linear-gradient(180deg, color-mix(in srgb, var(--block) 30%, var(--c-surface)) 0%, color-mix(in srgb, var(--block) 52%, var(--c-surface)) 100%);box-shadow:inset 0 1px 0 rgba(255, 255, 255, var(--gloss-strength)), 0 10px 22px -14px color-mix(in srgb, var(--block) 80%, 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var(--s-5)}.pg-panel__title{align-items:center;gap:var(--s-2);margin:0 0 var(--s-4);font-size:var(--fs-lg);display:flex}.pg-panel__title .pg-panel__aside{font-family:var(--font-ui);font-size:var(--fs-sm);color:var(--c-ink-2);margin-left:auto;font-weight:500}.pg-input{border-radius:var(--r-md);border:1.5px solid var(--c-line-strong);background:var(--c-surface);width:100%;min-height:48px;color:var(--c-ink);font-size:var(--fs-md);transition:border-color var(--dur-micro) var(--ease-out), box-shadow var(--dur-micro) var(--ease-out);padding:10px 16px}.pg-input::placeholder{color:color-mix(in srgb, var(--c-ink-2) 80%, transparent)}.pg-input:focus{border-color:var(--c-navy);box-shadow:var(--focus-ring);outline:none}.pg-input:disabled{opacity:.6}.pg-input--big{min-height:56px;font-family:var(--font-display);font-size:var(--fs-xl);text-align:center;letter-spacing:.04em;font-weight:700}.pg-select{appearance:none;border-radius:var(--r-md);border:1.5px solid var(--c-line-strong);background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%236b7097' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9.5 6 6 6-6'/%3E%3C/svg%3E") no-repeat right 14px center / 18px, var(--c-surface);width:100%;min-height:48px;color:var(--c-ink);font-size:var(--fs-md);cursor:pointer;padding:10px 44px 10px 16px}.pg-select:focus{border-color:var(--c-navy);box-shadow:var(--focus-ring);outline:none}.pg-field{gap:var(--s-2);flex-direction:column;min-width:0;display:flex}.pg-field__label{font-size:var(--fs-sm);color:var(--c-ink);font-weight:700}.pg-field__hint{font-size:var(--fs-xs);color:var(--c-ink-2)}.pg-note{align-items:flex-start;gap:var(--s-2);border-radius:var(--r-md);background:var(--c-surface-2);color:var(--c-ink);font-size:var(--fs-sm);padding:10px 14px;display:flex}.pg-note--info{background:var(--c-navy-soft)}.pg-note--oops{background:var(--c-oops-soft);color:var(--c-oops-ink)}.pg-note--success{background:var(--c-success-soft);color:var(--c-success-ink)}.pg-note--gold{background:var(--c-gold-soft);color:var(--c-gold-ink)}.pg-actions{justify-content:center;align-items:center;gap:var(--s-3);flex-wrap:wrap;display:flex}.pg-actions--end{justify-content:flex-end}@container pg-page (width<=640px){.pg-header__row{flex-wrap:wrap}.pg-header__actions{justify-content:flex-start;width:100%}}@media (prefers-reduced-motion:reduce){.pg-podium__place{animation:none}}.pg-page .ds-eyebrow{text-transform:none;letter-spacing:.01em;font-size:var(--fs-sm)}.pg-podium{width:100%}.welcome{gap:var(--s-4);flex-direction:column;display:flex}.welcome__lead{color:var(--c-ink-2);margin:0}.welcome__label{font-size:var(--fs-xs);color:var(--c-ink-2);margin-bottom:4px;font-weight:700;display:block}.welcome__stats{gap:var(--s-2);grid-template-columns:repeat(auto-fit,minmax(0,1fr));margin:0;padding:0;list-style:none;display:grid}.welcome__stats li{align-items:center;column-gap:var(--s-2);border-radius:var(--r-md);background:var(--c-surface-2);grid-template-columns:auto 1fr;padding:10px 12px;display:grid}.welcome__stats .pg-art{grid-row:1/3}.welcome__stats strong{font-family:var(--font-display);font-size:var(--fs-xl);line-height:1.1}.welcome__stats span{color:var(--c-ink-2);font-size:.75rem;line-height:1.3}.welcome__news ul{flex-direction:column;gap:4px;margin:0;padding:0;list-style:none;display:flex}.welcome__news li{align-items:center;gap:var(--s-2);border-radius:var(--r-md);border:1px solid var(--c-line);font-size:var(--fs-sm);padding:6px 6px 6px 10px;display:flex}.welcome__news li>span:not(.pg-art){flex:auto;min-width:0}.welcome__next{border-radius:var(--r-md);background:var(--c-primary-soft);margin:0;padding:10px 14px}.welcome__next strong{font-family:var(--font-display);font-size:var(--fs-lg)}.rm-stairs{position:relative}.rm-stairs__steps{gap:var(--s-3);grid-template-columns:repeat(3,minmax(0,1fr));align-items:end;margin:0;padding:0;list-style:none;display:grid}.rm-step{--tone:var(--c-olive);flex-direction:column;justify-content:flex-end;min-width:0;display:flex}.rm-step--navy{--tone:var(--c-navy)}.rm-step--gold{--tone:var(--c-gold)}.rm-step__marker{min-height:128px;padding-bottom:var(--s-2);justify-content:center;align-items:flex-end;display:flex;position:relative}.rm-step__block{align-items:flex-start;gap:var(--s-2);min-height:132px;padding:var(--s-3) var(--s-4) var(--s-4);border-radius:var(--r-lg) var(--r-lg) var(--r-md) var(--r-md);border:1px solid color-mix(in srgb, var(--tone) 32%, var(--c-line));background:linear-gradient(180deg, color-mix(in srgb, var(--tone) 16%, var(--c-surface)) 0%, color-mix(in srgb, var(--tone) 8%, var(--c-surface)) 100%);box-shadow:var(--gloss-top), var(--shadow-card);transition:transform var(--dur-panel) var(--ease-out), box-shadow var(--dur-panel) var(--ease-out);flex-direction:column;display:flex;position:relative}.rm-step:nth-child(2) .rm-step__block{min-height:172px}.rm-step:nth-child(3) .rm-step__block{min-height:212px}.rm-step__head{align-items:center;gap:var(--s-2);display:flex}.rm-step__text{flex-direction:column;gap:2px;min-width:0;display:flex}.rm-step__level{font-size:var(--fs-xs);color:var(--c-ink-2);font-weight:700}.rm-step__title{font-family:var(--font-display);font-size:var(--fs-lg);line-height:var(--lh-tight);font-weight:800}.rm-step__band{font-size:var(--fs-xs);color:var(--c-ink-2);font-variant-numeric:tabular-nums}.rm-step__note{margin-top:var(--s-1);font-size:var(--fs-xs);font-weight:700}.rm-step.is-current .rm-step__block{background:var(--grad-primary);color:var(--c-on-primary);box-shadow:var(--gloss-top), 0 16px 32px -14px color-mix(in srgb, var(--c-primary-deep) 75%, transparent);border-color:#0000;transform:translateY(-2px)}.rm-step.is-current .rm-step__level,.rm-step.is-current .rm-step__band{color:color-mix(in srgb, var(--c-on-primary) 78%, transparent)}.rm-step.is-passed .rm-step__block{opacity:.82}.rm-pill{align-items:center;gap:var(--s-1);border-radius:var(--r-pill);font-family:var(--font-display);font-size:var(--fs-sm);white-space:nowrap;padding:3px 12px;font-weight:700;line-height:1.4;display:inline-flex}.rm-pill--here{background:var(--c-ink);color:var(--c-bg);box-shadow:var(--shadow-card)}.rm-pill--goal{background:var(--c-gold-soft);color:var(--c-gold-ink);border:1px solid color-mix(in srgb, var(--c-gold) 45%, transparent)}.rm-here{flex-direction:column;align-items:center;gap:2px;display:flex}.rm-here .ds-mascot__body{animation:rm-hop 2.8s var(--ease-in-out) infinite}.rm-here--unknown .rm-pill--here{background:var(--c-surface);color:var(--c-ink);border:1px dashed var(--c-line-strong)}.rm-goal{align-items:center;gap:var(--s-1);flex-direction:column;display:flex}.rm-goal--inside{background:color-mix(in srgb, var(--c-surface) 88%, transparent);color:var(--c-gold-ink);margin-top:auto;padding-left:4px}@keyframes rm-hop{0%,to{transform:translateY(0)}50%{transform:translateY(-5px)}}.rm-ruler{margin-top:var(--s-4)}.rm-ruler__track{border-radius:var(--r-pill);background:var(--c-surface-2);border:1px solid var(--c-line);height:10px;position:relative}.rm-ruler__range{top:-1px;bottom:-1px;left:calc(var(--range-start) * 100%);right:calc((1 - var(--range-end)) * 100%);border-radius:var(--r-pill);background:var(--grad-primary);min-width:10px;box-shadow:0 4px 10px -4px color-mix(in srgb, var(--c-primary-deep) 70%, transparent);position:absolute}.rm-ruler__dash{top:50%;left:calc(var(--range-end) * 100% + 8px);border-top:2px dashed color-mix(in srgb, var(--c-primary) 70%, var(--c-ink-2));position:absolute;right:2px;transform:translateY(-50%)}.rm-ruler__ticks{height:22px;margin-top:var(--s-1);position:relative}.rm-ruler__tick{font-size:var(--fs-xs);color:var(--c-ink-2);font-variant-numeric:tabular-nums;font-weight:600;position:absolute;top:0;transform:translate(-50%)}.rm-ruler__tick:first-child{transform:none}.rm-ruler__tick:last-child{transform:translate(-100%)}@media (width<=760px){.rm-step__block{padding:var(--s-3);flex-direction:column}.rm-step__title{font-size:var(--fs-md)}}.lp-page{overflow-x:clip}.lp-hero{align-items:center;gap:var(--s-5);max-width:1320px;min-height:min(690px,100vh - 158px);padding-top:var(--s-2);padding-bottom:var(--s-6);grid-template-columns:minmax(0,1.12fr) minmax(0,1fr);display:grid}.lp-hero__copy{align-items:flex-start;gap:var(--s-5);animation:lp-rise .6s var(--ease-out) both;flex-direction:column;display:flex}.lp-eyebrow{align-items:center;gap:var(--s-2);border-radius:var(--r-pill);background:var(--c-surface);border:1px solid var(--c-line);box-shadow:var(--gloss-top), var(--shadow-card);font-size:var(--fs-sm);color:var(--c-ink-2);padding:6px 14px 6px 8px;font-weight:600;display:inline-flex}.lp-hero__title{flex-direction:column;margin:0;font-size:clamp(2.5rem,4.2vw,4rem);line-height:1.12;display:flex}.lp-hero__title>span{white-space:nowrap}.lp-hero__accent{background:linear-gradient(90deg, var(--c-primary-ink) 0%, var(--c-primary-deep) 70%, color-mix(in srgb, var(--c-primary-deep) 70%, var(--c-red)) 100%);color:#0000;-webkit-background-clip:text;background-clip:text;width:fit-content;padding-bottom:.12em;position:relative}.lp-hero__accent:after{content:"";opacity:.9;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 300 16' preserveAspectRatio='none'%3E%3Cpath d='M3 11c40-7 92-9 148-6 52 3 98 4 146-3' fill='none' stroke='%23F5B82E' stroke-width='5' stroke-linecap='round'/%3E%3C/svg%3E") 50%/100% 100% 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var(--c-line));box-shadow:var(--gloss-top), var(--shadow-raised), 0 0 0 4px color-mix(in srgb, var(--c-primary) 18%, transparent)}.lp-chip[data-side=back]{box-shadow:var(--gloss-top), var(--shadow-card)}.lp-chip__word{padding-top:2px}.lp-section{padding-top:var(--s-9);padding-bottom:var(--s-9)}.lp-kicker{margin-bottom:var(--s-2);font-size:var(--fs-sm);color:var(--c-primary-ink);letter-spacing:.01em;font-weight:700;display:inline-block}.lp-h2{margin:0 0 var(--s-3);font-size:clamp(2rem,3vw,2.75rem)}.lp-h2--center{text-align:center;margin-bottom:var(--s-7)}.lp-h3{margin:0 0 var(--s-2);font-size:var(--fs-2xl)}.lp-lead{color:var(--c-ink-2);font-size:var(--fs-md);margin-bottom:var(--s-5)}.lp-note{margin:var(--s-5) 0 0;text-align:center;color:var(--c-ink-2);font-size:var(--fs-sm)}.lp-stairs-card{gap:var(--s-8);padding:var(--s-8);border-radius:var(--r-xl);background:var(--c-surface);border:1px solid var(--c-line);box-shadow:var(--shadow-card);grid-template-columns:minmax(260px,340px) minmax(0,1fr);align-items:end;display:grid}.lp-stairs-card__intro{align-self:center}.lp-tracks{gap:var(--s-6);grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.lp-track{--track-tone:var(--c-navy);padding:var(--s-7);border-radius:var(--r-xl);background:var(--c-surface);border:1px solid var(--c-line);box-shadow:var(--gloss-top), var(--shadow-card);transition:transform var(--dur-panel) var(--ease-out), box-shadow var(--dur-panel) var(--ease-out);position:relative;overflow:hidden}.lp-track--ielts{--track-tone:var(--c-primary)}.lp-track:before{content:"";background:radial-gradient(circle, color-mix(in srgb, var(--track-tone) 22%, transparent), transparent 70%);pointer-events:none;border-radius:50%;width:260px;height:260px;position:absolute;top:-80px;right:-80px}.lp-track:hover{box-shadow:var(--gloss-top), var(--shadow-raised);transform:translateY(-3px)}.lp-track__art{margin-bottom:var(--s-3);filter:drop-shadow(0 10px 14px rgba(var(--shadow-rgb), .18))}.lp-track__title{margin:0 0 var(--s-2);font-size:var(--fs-2xl)}.lp-track p{color:var(--c-ink-2);max-width:40ch}.lp-track__points{gap:var(--s-2);margin:var(--s-4) 0 0;flex-wrap:wrap;padding:0;list-style:none;display:flex}.lp-track__points li{border-radius:var(--r-pill);background:color-mix(in srgb, var(--track-tone) 12%, var(--c-surface));color:var(--c-ink);font-size:var(--fs-sm);padding:4px 12px;font-weight:600}.lp-skills{gap:var(--s-4);grid-template-columns:repeat(5,minmax(0,1fr));margin:0;padding:0;list-style:none;display:grid}.lp-skill{align-items:center;gap:var(--s-2);padding:var(--s-6) var(--s-4) var(--s-5);border-radius:var(--r-lg);background:var(--c-surface);border:1px solid var(--c-line);box-shadow:var(--gloss-top), var(--shadow-card);text-align:center;transition:transform var(--dur-panel) var(--ease-out);flex-direction:column;display:flex;position:relative;overflow:hidden}.lp-skill:after{content:"";background:var(--skill-color);height:5px;position:absolute;bottom:0;left:0;right:0}.lp-skill:hover{transform:translateY(-3px)}.lp-skill__name{font-size:var(--fs-lg);line-height:1.2}.lp-skill__line{font-size:var(--fs-sm);color:var(--c-ink-2);line-height:1.45}.lp-family-section{grid-template-columns:minmax(0,760px);justify-content:center;display:grid}.lp-family{padding:var(--s-7);border-radius:var(--r-xl);background:var(--c-surface);border:1px solid var(--c-line);box-shadow:var(--gloss-top), var(--shadow-card);flex-direction:column;display:flex}.lp-family>p{color:var(--c-ink-2)}.lp-board{padding:var(--s-4);border-radius:var(--r-lg);background:var(--c-surface-2);border:1px solid var(--c-line);margin-top:auto}.lp-board__head{margin-bottom:var(--s-2);font-size:var(--fs-xs);color:var(--c-ink-2);justify-content:space-between;font-weight:700;display:flex}.lp-board__sample{font-style:italic;font-weight:500}.lp-board__rows{flex-direction:column;gap:6px;margin:0;padding:0;list-style:none;display:flex}.lp-board__row{align-items:center;gap:var(--s-2);border-radius:var(--r-md);background:var(--c-surface);grid-template-columns:28px 36px minmax(70px,auto) 1fr auto;padding:6px 10px;display:grid}.lp-board__rank{color:var(--c-ink-2);place-items:center;font-weight:700;display:grid}.lp-board__name{white-space:nowrap;font-weight:700}.lp-board__bar{border-radius:var(--r-pill);background:var(--c-surface-2);height:8px;overflow:hidden}.lp-board__bar span{border-radius:inherit;background:var(--grad-gold);height:100%;display:block}.lp-board__xp{font-size:var(--fs-sm);font-variant-numeric:tabular-nums;color:var(--c-gold-ink);font-weight:700}.lp-board__goal{margin-top:var(--s-3);font-size:var(--fs-sm);flex-direction:column;gap:6px;font-weight:600;display:flex}.lp-final{align-items:center;gap:var(--s-6);padding:var(--s-7) var(--s-8);border-radius:var(--r-xl);color:var(--c-ink);box-shadow:var(--shadow-raised);background:radial-gradient(600px 300px at 10% 0,#7d8cff59,#0000 70%),radial-gradient(500px 260px at 100% 100%,#ff9d4747,#0000 70%),linear-gradient(135deg,#1a2160 0%,#0e1330 100%);grid-template-columns:auto minmax(0,1fr) auto;display:grid;position:relative;overflow:hidden}.lp-final__stars{pointer-events:none;background-image:radial-gradient(1.5px 1.5px at 20% 30%,#fffc,#0000),radial-gradient(1.5px 1.5px at 60% 18%,#fff9,#0000),radial-gradient(1px 1px at 78% 62%,#ffffffb3,#0000),radial-gradient(1.5px 1.5px at 40% 80%,#ffffff80,#0000),radial-gradient(1px 1px at 88% 24%,#fffc,#0000),radial-gradient(1px 1px at 8% 70%,#fff9,#0000);position:absolute;inset:0}.lp-final__mascot{margin:calc(var(--s-4) * -1) 0;position:relative}.lp-final__copy{position:relative}.lp-final__copy p{color:var(--c-ink-2);font-size:var(--fs-md);margin:0}.lp-final .lp-h2{margin-bottom:var(--s-2)}.lp-footer{justify-content:space-between;align-items:center;gap:var(--s-4);padding-top:var(--s-4);padding-bottom:var(--s-8);font-size:var(--fs-sm);color:var(--c-ink-2);display:flex}@keyframes lp-rise{0%{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}@keyframes lp-bob{0%,to{transform:translateY(0)}50%{transform:translateY(-4px)}}@media (width<=1180px){.lp-hero{grid-template-columns:minmax(0,1fr) minmax(0,.95fr)}.lp-stairs-card{gap:var(--s-6);padding:var(--s-7);grid-template-columns:1fr}}@media (width<=900px){.lp-hero{min-height:0;padding-top:var(--s-5);grid-template-columns:1fr}.lp-stage{height:420px}.lp-tracks{grid-template-columns:1fr}.lp-skills{grid-template-columns:repeat(3,minmax(0,1fr))}.lp-final{text-align:center;grid-template-columns:1fr;justify-items:center}}@media (width<=600px){.lp-skills{grid-template-columns:repeat(2,minmax(0,1fr))}.lp-stage{height:360px}}@media (width<=520px){.lp-hero__title>span{white-space:normal}}.lp-family-points{gap:var(--s-2);margin:var(--s-4) 0 0;padding:0;list-style:none;display:grid}.lp-family-points li{align-items:center;gap:var(--s-2);font-weight:600;display:flex}.lp-family-points .ds-icon{color:var(--c-success);flex:none}.au-layout{gap:var(--s-8);min-height:calc(100vh - 68px);padding-top:var(--s-6);padding-bottom:var(--s-8);grid-template-columns:minmax(0,1fr) minmax(0,480px);align-content:center;align-items:center;display:grid}.au-panel{top:calc(68px + var(--s-5));align-self:start;align-items:center;gap:var(--s-4);padding:var(--s-7);border-radius:var(--r-xl);background:radial-gradient(420px 260px at 50% 30%, color-mix(in srgb, var(--c-gold) 30%, transparent), transparent 70%), linear-gradient(160deg, color-mix(in srgb, var(--c-primary) 18%, var(--c-surface)) 0%, var(--c-surface) 70%);border:1px solid var(--c-line);box-shadow:var(--gloss-top), var(--shadow-card);text-align:center;flex-direction:column;display:flex;position:sticky;overflow:hidden}:root[data-theme=dark] .au-panel{background:radial-gradient(420px 260px at 50% 30%, color-mix(in srgb, var(--c-navy) 40%, transparent), transparent 70%), linear-gradient(160deg, #1a2160 0%, var(--c-surface) 75%)}.au-panel__glow{background:radial-gradient(ellipse at 50% 0%, color-mix(in srgb, var(--c-primary) 18%, transparent), transparent 70%);pointer-events:none;height:60%;position:absolute;inset:auto -20% 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ds-number-flip{0%{opacity:0;transform:rotateX(90deg)}to{opacity:1;transform:rotateX(0)}}@keyframes ds-nudge{0%,to{transform:translate(0)}25%{transform:translate(-4px)}75%{transform:translate(4px)}}@keyframes ds-spin{to{transform:rotate(360deg)}}.ds-anim-pop{animation:ds-pop .32s var(--ease-spring) both}.ds-anim-rise{animation:ds-rise-in var(--dur-panel) var(--ease-out) both}.ds-anim-fade{animation:ds-fade-in var(--dur-panel) var(--ease-out) both}.ds-anim-float{animation:ds-float 3.2s var(--ease-in-out) infinite}.ds-anim-glow{animation:ds-glow-breathe 2.6s var(--ease-in-out) infinite}.ds-anim-squish{animation:ds-squish .18s var(--ease-out)}.ds-anim-nudge{animation:ds-nudge .26s var(--ease-out)}.ds-stack{gap:var(--s-4);flex-direction:column;display:flex}.ds-row{align-items:center;gap:var(--s-3);display:flex}.ds-row--wrap{flex-wrap:wrap}.ds-row--between{justify-content:space-between}.ds-row--end{justify-content:flex-end}.ds-center{text-align:center;place-items:center;display:grid}.ds-grow{flex:auto;min-width:0}.ds-gap-1{gap:var(--s-1)}.ds-gap-2{gap:var(--s-2)}.ds-gap-3{gap:var(--s-3)}.ds-gap-4{gap:var(--s-4)}.ds-gap-5{gap:var(--s-5)}.ds-gap-6{gap:var(--s-6)}.ds-gap-7{gap:var(--s-7)}.ds-auto-grid{grid-template-columns:repeat(auto-fill, minmax(var(--min,220px), 1fr));gap:var(--s-4);display:grid}.ds-text-xs{font-size:var(--fs-xs)}.ds-text-sm{font-size:var(--fs-sm)}.ds-text-lg{font-size:var(--fs-lg)}.ds-text-xl{font-size:var(--fs-xl)}.ds-bold{font-weight:700}.ds-eyebrow{font-size:var(--fs-xs);letter-spacing:.08em;text-transform:uppercase;color:var(--c-ink-2);font-weight:700}.ds-surface{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);box-shadow:var(--shadow-card)}.ds-theme-scope{background:var(--c-bg);color:var(--c-ink)}:root,[data-theme]{--color-page:var(--c-bg);--color-surface:var(--c-surface);--color-surface-soft:var(--c-surface-2);--color-text:var(--c-ink);--color-muted:var(--c-ink-2);--color-border:var(--c-line);--color-primary:var(--c-navy);--color-primary-dark:color-mix(in srgb, var(--c-navy) 82%, #000);--color-primary-soft:var(--c-primary-soft);--color-success:var(--c-success-ink);--color-success-dark:var(--c-success-ink);--color-success-soft:var(--c-success-soft);--color-error:var(--c-red-ink);--color-error-dark:var(--c-red-ink);--color-error-soft:var(--c-red-soft);--color-warning:var(--c-gold-ink);--color-warning-soft:var(--c-gold-soft);--color-streak:var(--c-red-ink);--color-heart:var(--c-red);--radius-small:var(--r-sm);--radius:var(--r-md);--radius-large:var(--r-lg);--font:var(--font-ui)}details>summary{cursor:pointer;font-weight:600}.page{max-width:1180px;margin:0 auto;padding:32px 24px 64px}.app-shell__main .page{padding:0}.page--narrow{max-width:760px}.page-header{margin-bottom:24px}.page-header p{color:var(--color-muted);max-width:720px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;display:grid}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;display:grid}.dashboard-grid{grid-template-columns:minmax(0,2fr) minmax(0,1fr);align-items:start;gap:20px;display:grid}.stack{flex-direction:column;gap:16px;display:flex}.row{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.row--between{justify-content:space-between}@media (width<=900px){.dashboard-grid,.grid-3{grid-template-columns:1fr}}@media (width<=700px){.page{padding:20px 16px 48px}.grid-2{grid-template-columns:1fr}}.button{min-height:var(--btn-h-md);border-radius:var(--r-pill);font-family:var(--font-display);letter-spacing:.01em;cursor:pointer;background:var(--c-surface-2);color:var(--c-ink);box-shadow:var(--gloss-top), inset 0 0 0 1px var(--c-line);transition:transform var(--dur-press) var(--ease-out), box-shadow var(--dur-micro) var(--ease-out), filter var(--dur-micro) var(--ease-out), background-color var(--dur-micro) var(--ease-out);white-space:nowrap;border:none;justify-content:center;align-items:center;gap:8px;padding:0 22px;font-size:1.0625rem;font-weight:700;line-height:1;display:inline-flex;position:relative;text-decoration:none!important}.button:hover:not(:disabled){filter:brightness(1.04);transform:translateY(-1px)}.button:active:not(:disabled){transform:scale(.97)}.button:disabled{cursor:not-allowed;opacity:.48;filter:saturate(.6)}.button--primary{background:var(--grad-primary);color:var(--c-on-primary);box-shadow:var(--gloss-top), inset 0 -2px 0 #0000000f, 0 8px 18px -8px color-mix(in srgb, var(--c-primary-deep) 60%, transparent)}.button--primary:hover:not(:disabled){background:var(--grad-primary)}.button--success{background:var(--grad-success);color:#1e2347;box-shadow:var(--gloss-top), 0 8px 18px -8px color-mix(in srgb, var(--c-success) 60%, transparent)}.button--danger{background:linear-gradient(180deg, var(--c-red) 0%, color-mix(in srgb, var(--c-red) 55%, var(--c-red-ink)) 55%, var(--c-red-ink) 100%);color:var(--c-on-red);box-shadow:var(--gloss-top), 0 8px 18px -8px color-mix(in srgb, var(--c-red) 60%, transparent)}.button--secondary{background:linear-gradient(180deg, color-mix(in srgb, var(--c-surface-2) 60%, var(--c-surface)) 0%, var(--c-surface-2) 100%);color:var(--c-ink);box-shadow:var(--gloss-top), inset 0 0 0 1px var(--c-line), 0 6px 14px -10px rgba(var(--shadow-rgb), .5)}.button--secondary:hover:not(:disabled){background:var(--c-surface-3)}.button--ghost{color:var(--c-ink-2);box-shadow:none;background:0 0;padding:0 14px}.button--ghost:hover:not(:disabled){background:var(--c-surface-2);color:var(--c-ink);filter:none;transform:none}.button--small{min-height:var(--btn-h-sm);padding:0 14px;font-size:.9375rem}.button--large{min-height:var(--btn-h-lg);padding:0 30px;font-size:1.1875rem}.button--wide{width:100%}.card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);box-shadow:var(--gloss-top), var(--shadow-card);padding:24px}.card--soft{background:var(--c-surface-2);box-shadow:none;border-color:#0000}.card--highlight{border-color:color-mix(in srgb, var(--c-primary) 40%, var(--c-line));background:linear-gradient(180deg, var(--c-primary-soft), var(--c-surface) 75%)}.card h3{margin-bottom:6px}.muted{color:var(--color-muted)}.small{font-size:.875rem}.badge{border-radius:var(--r-pill);background:var(--c-surface-2);min-height:24px;color:var(--c-ink-2);align-items:center;gap:4px;padding:2px 10px;font-size:.78rem;font-weight:700;display:inline-flex}.badge--primary{background:var(--c-primary-soft);color:var(--c-primary-ink)}.badge--success{background:var(--c-success-soft);color:var(--c-success-ink)}.badge--error{background:var(--c-red-soft);color:var(--c-red-ink)}.badge--warning{background:var(--c-gold-soft);color:var(--c-gold-ink)}.progress-bar{background:var(--c-surface-2);border-radius:var(--r-pill);height:12px;box-shadow:inset 0 1.5px 2px rgba(var(--shadow-rgb), .12);overflow:hidden}.progress-bar__fill{background:var(--grad-primary);border-radius:var(--r-pill);height:100%;box-shadow:inset 0 1.5px 0 rgba(255, 255, 255, calc(var(--gloss-strength) * .9));transition:width var(--dur-progress) var(--ease-out)}.stat{flex-direction:column;display:flex}.stat__value{font-family:var(--font-display);font-size:1.75rem;font-weight:800;line-height:1.1}.stat__label{color:var(--color-muted);font-size:.85rem}.alert{border-radius:var(--r-md);background:var(--c-red-soft);color:var(--c-red-ink);padding:12px 16px;font-size:.92rem;font-weight:500}.alert--info{background:var(--c-navy-soft);color:var(--c-navy)}.alert--warning{background:var(--c-gold-soft);color:var(--c-gold-ink)}.form-field{flex-direction:column;gap:6px;display:flex}.form-field label{font-size:.9rem;font-weight:600}.text-input,.text-area{border:1.5px solid var(--c-line-strong);background:var(--c-surface);width:100%;color:var(--c-ink);box-shadow:inset 0 1px 2px rgba(var(--shadow-rgb), .05);transition:border-color var(--dur-micro) var(--ease-out), box-shadow var(--dur-micro) var(--ease-out);border-radius:14px;padding:12px 16px}.text-input::placeholder,.text-area::placeholder{color:color-mix(in srgb, var(--c-ink-2) 75%, transparent)}.text-input:focus,.text-area:focus{border-color:var(--c-primary);box-shadow:0 0 0 4px color-mix(in srgb, var(--c-primary) 22%, transparent);outline:none}.text-area{resize:vertical;min-height:160px;line-height:1.6}.skill-dot{border-radius:50%;width:10px;height:10px;display:inline-block}.empty-state{text-align:center;color:var(--color-muted);padding:48px 16px}.lesson-shell{background:var(--color-surface);flex-direction:column;min-height:100vh;display:flex}.lesson-topbar{align-items:center;gap:18px;width:100%;max-width:980px;margin:0 auto;padding:22px 24px 8px;display:flex}.lesson-topbar .progress-bar{flex:1;height:16px}.hearts{color:var(--color-heart);white-space:nowrap;font-size:1.05rem;font-weight:800}.lesson-body{flex:1;width:100%;max-width:760px;margin:0 auto;padding:24px 24px 160px}.lesson-body--wide{max-width:1080px}.exercise-instruction{margin-bottom:20px;font-size:1.45rem;font-weight:700}.exercise-prompt{margin-bottom:20px;font-size:1.15rem}.option-list{gap:12px;display:grid}.option-list--two-columns{grid-template-columns:repeat(2,minmax(0,1fr))}.option-button{text-align:left;border:2px solid var(--color-border);background:var(--color-surface);cursor:pointer;border-bottom-width:4px;border-radius:14px;align-items:center;gap:14px;width:100%;padding:14px 16px;font-size:1.02rem;transition:background .12s,border-color .12s;display:flex}.option-button:hover:not(:disabled){background:var(--color-surface-soft)}.option-button:disabled{cursor:default}.option-button__key{border:2px solid var(--color-border);width:28px;height:28px;color:var(--color-muted);border-radius:8px;flex:none;place-items:center;font-size:.8rem;font-weight:700;display:grid}.option-button.is-selected{border-color:var(--color-primary);background:var(--color-primary-soft)}.option-button.is-selected .option-button__key{border-color:var(--color-primary);color:var(--color-primary)}.word-chip{border:2px solid var(--color-border);background:var(--color-surface);cursor:pointer;border-bottom-width:4px;border-radius:12px;padding:9px 14px;font-size:1rem;font-weight:500}.word-chip:hover:not(:disabled){background:var(--color-surface-soft)}.word-chip.is-used{visibility:hidden}.word-chip.is-matched{opacity:.35;cursor:default}.answer-line{border-bottom:2px solid var(--color-border);flex-wrap:wrap;gap:8px;min-height:64px;margin-bottom:28px;padding:8px 0;display:flex}.word-bank{flex-wrap:wrap;justify-content:center;gap:8px;display:flex}.match-columns{grid-template-columns:1fr 1fr;gap:12px 28px;display:grid}.match-columns .word-chip{text-align:center;width:100%}.inline-blank-input{border:none;border-bottom:3px solid var(--color-primary);width:180px;font-size:inherit;text-align:center;background:var(--color-primary-soft);border-radius:6px 6px 0 0;padding:2px 6px;display:inline-block}.inline-blank-input:focus{outline:none}.speaker-row{align-items:center;gap:12px;margin-bottom:24px;display:flex}.speaker-button{background:var(--color-primary);color:#fff;cursor:pointer;width:76px;height:76px;box-shadow:0 4px 0 var(--color-primary-dark);border:none;border-radius:20px;font-size:2rem}.speaker-button--small{background:var(--color-primary-soft);width:52px;height:52px;color:var(--color-primary);box-shadow:0 3px 0 color-mix(in srgb, var(--color-primary) 30%, transparent);border-radius:14px;font-size:1.3rem}.speaker-button:active{box-shadow:none;transform:translateY(3px)}.inline-speaker{cursor:pointer;color:var(--color-primary);background:0 0;border:none;padding:0 4px;font-size:1rem}.microphone-button{border:2px dashed color-mix(in srgb, var(--color-primary) 45%, var(--color-border));background:var(--color-primary-soft);width:100%;color:var(--color-primary);cursor:pointer;border-radius:18px;padding:22px;font-size:1.05rem;font-weight:700}.microphone-button.is-active{border-style:solid;border-color:var(--color-error);background:var(--color-error-soft);color:var(--color-error);animation:1.2s infinite pulse}.passage-box{background:var(--color-surface-soft);border-radius:var(--radius);font-family:var(--font-reading);max-height:340px;margin-bottom:20px;padding:18px 20px;font-size:1.05rem;line-height:1.7;overflow-y:auto}.passage-box h4{font-family:var(--font)}.feedback-footer{border-top:2px solid var(--color-border);background:var(--color-surface);z-index:10;position:fixed;bottom:0;left:0;right:0}.feedback-footer.is-correct{background:var(--color-success-soft);border-color:#0000}.feedback-footer.is-wrong{background:var(--color-error-soft);border-color:#0000}.feedback-footer__inner{justify-content:space-between;align-items:center;gap:20px;max-width:980px;margin:0 auto;padding:20px 24px;display:flex}.feedback-footer__title{font-size:1.3rem;font-weight:800}.feedback-footer.is-correct .feedback-footer__title{color:var(--color-success)}.feedback-footer__detail{max-width:620px;font-size:.95rem}.feedback-footer__detail p{margin:2px 0}.teaching-card{border:1px solid var(--color-border);border-radius:var(--radius-large);background:var(--color-surface);box-shadow:var(--shadow-raised);padding:28px 32px}.teaching-card__body{white-space:pre-line;font-size:1.05rem}.example-list{gap:10px;margin:16px 0 0;padding:0;list-style:none;display:grid}.example-list li{background:var(--color-surface-soft);border-radius:10px;padding:10px 14px}.example-list .example-en{font-weight:600}.example-list .example-vi{color:var(--color-muted);font-size:.92rem}.flashcard-grid{grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px;display:grid}.word-card{border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-surface);padding:16px}.word-card__word{font-size:1.2rem;font-weight:700}.word-card__ipa{color:var(--color-muted);font-size:.9rem}.celebration{text-align:center;padding:48px 0}.celebration__emoji{margin-bottom:12px;font-size:4rem;animation:.5s pop}.ai-feedback{border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-surface);margin-top:16px;padding:18px 20px}.band-circle{background:var(--color-primary);color:#fff;border-radius:50%;flex:none;place-items:center;width:64px;height:64px;font-size:1.4rem;font-weight:800;display:grid}.criteria-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:14px 0;display:grid}.criteria-item{background:var(--color-surface-soft);border-radius:10px;padding:10px 12px;font-size:.9rem}.correction{border-bottom:1px solid var(--color-border);padding:10px 0;font-size:.93rem}.correction:last-child{border-bottom:none}.correction del{color:var(--color-error)}.correction ins{color:var(--color-success);font-weight:600;text-decoration:none}.mind-map{flex-direction:column;gap:0;display:flex;position:relative}.mind-map__start{grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:32px;display:grid}.mind-map__step{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);align-items:center;gap:10px;padding:14px;font-size:.92rem;font-weight:600;display:flex}.mind-map__step-number{background:var(--color-primary);color:#fff;border-radius:50%;flex:none;place-items:center;width:30px;height:30px;font-weight:800;display:grid}.mind-map__level{grid-template-columns:240px 1fr;align-items:stretch;gap:0;display:grid;position:relative}.mind-map__spine{padding:12px 28px 12px 0;position:relative}.mind-map__spine:before{content:"";background:var(--color-border);width:3px;position:absolute;top:0;bottom:0;left:23px}.mind-map__level:first-of-type .mind-map__spine:before{top:40px}.mind-map__level:last-of-type .mind-map__spine:before{bottom:calc(100% - 40px)}.mind-map__node{align-items:flex-start;gap:14px;display:flex;position:relative}.mind-map__circle{z-index:1;background:var(--color-surface);border:3px solid var(--color-border);width:48px;height:48px;color:var(--color-muted);border-radius:50%;flex:none;place-items:center;font-weight:800;display:grid;position:relative}.mind-map__level.is-current .mind-map__circle{border-color:var(--color-primary);background:var(--color-primary);color:#fff;box-shadow:0 0 0 6px var(--color-primary-soft)}.mind-map__level.is-done .mind-map__circle{border-color:var(--color-success);background:var(--color-success);color:#fff}.mind-map__branches{grid-template-columns:repeat(5,minmax(0,1fr));gap:10px;padding:12px 0 28px;display:grid;position:relative}.mind-map__branches:before{content:"";background:var(--color-border);width:28px;height:3px;position:absolute;top:36px;left:-28px}.mind-map__branch{background:var(--color-surface);border:1px solid var(--color-border);border-top:4px solid var(--branch-color);border-radius:12px;padding:10px 12px;font-size:.85rem}.mind-map__branch strong{font-size:.92rem;display:block}.mind-map__level.is-locked .mind-map__branch{opacity:.55}@media (width<=900px){.mind-map__level{grid-template-columns:1fr}.mind-map__branches{grid-template-columns:repeat(2,1fr);padding-left:62px}.mind-map__branches:before{display:none}.mind-map__start{grid-template-columns:repeat(2,1fr)}}.skill-tabs{flex-wrap:wrap;gap:8px;margin-bottom:24px;display:flex}.skill-tab{border:2px solid var(--color-border);background:var(--color-surface);cursor:pointer;border-radius:12px;align-items:center;gap:8px;padding:10px 16px;font-weight:600;display:flex}.skill-tab.is-active{border-color:var(--tab-color);background:color-mix(in srgb, var(--tab-color) 10%, var(--color-surface));color:var(--tab-color)}.lesson-path{flex-direction:column;align-items:center;gap:18px;padding:20px 0;display:flex}.lesson-node{align-items:center;gap:18px;width:520px;max-width:100%;display:flex}.lesson-node:nth-child(4n+2){transform:translate(60px)}.lesson-node:nth-child(4n+4){transform:translate(-60px)}.lesson-node__circle{background:var(--node-color);color:#fff;cursor:pointer;width:72px;height:72px;box-shadow:0 6px 0 color-mix(in srgb, var(--node-color) 70%, #000);border:none;border-radius:50%;flex:none;place-items:center;font-size:1.6rem;display:grid}.lesson-node__circle:disabled{background:var(--color-border);cursor:not-allowed;box-shadow:0 6px #c9ced8}.lesson-node__circle.is-current{outline:6px solid color-mix(in srgb, var(--node-color) 25%, transparent)}.lesson-node__info{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);flex:1;padding:12px 16px}.lesson-node__info h4{margin:0 0 2px}.stars{color:#f5b301;letter-spacing:2px}@media (width<=700px){.lesson-node:nth-child(n){transform:none}}.exam-shell{background:#fff;flex-direction:column;min-height:100vh;display:flex}.exam-header{color:#fff;background:#1b2232;justify-content:space-between;align-items:center;gap:16px;padding:10px 24px;font-size:.92rem;display:flex}.exam-timer{font-variant-numeric:tabular-nums;background:#ffffff1f;border-radius:8px;padding:4px 12px;font-size:1.05rem;font-weight:700}.exam-timer.is-urgent{background:var(--color-error)}.exam-subheader{border-bottom:1px solid var(--color-border);background:var(--color-surface-soft);padding:10px 24px;font-size:.92rem}.exam-split{flex:1;grid-template-columns:1fr 1fr;min-height:0;display:grid}.exam-split>*{max-height:calc(100vh - 170px);padding:24px 28px;overflow-y:auto}.exam-split>:first-child{border-right:6px solid var(--color-surface-soft)}.exam-single{flex:1;width:100%;max-width:900px;margin:0 auto;padding:24px 28px;overflow-y:auto}.exam-passage{font-family:var(--font-reading);white-space:pre-line;font-size:1.05rem;line-height:1.75}.exam-question{border-bottom:1px solid var(--color-border);padding:12px 0}.exam-question__number{border:2px solid var(--color-text);border-radius:6px;place-items:center;min-width:28px;height:28px;margin-right:10px;font-size:.85rem;font-weight:700;display:inline-grid}.exam-question label{cursor:pointer;align-items:flex-start;gap:8px;padding:4px 0;display:flex}.exam-navigator{border-top:1px solid var(--color-border);background:var(--color-surface);flex-wrap:wrap;align-items:center;gap:6px;padding:10px 24px;display:flex}.exam-navigator button{border:1px solid var(--color-border);cursor:pointer;background:#fff;border-radius:6px;min-width:34px;height:32px;font-size:.82rem}.result-question{border-bottom:1px solid var(--color-border);grid-template-columns:40px 1fr;gap:12px;padding:12px 0;display:grid}.result-mark{color:#fff;border-radius:50%;place-items:center;width:32px;height:32px;font-weight:800;display:grid}.result-mark.is-correct{background:var(--color-success)}.result-mark.is-wrong{background:var(--color-error)}.chart-box{border:1px solid var(--color-border);border-radius:var(--radius-small);background:#fff;padding:12px}@media (width<=900px){.exam-split{grid-template-columns:1fr}.exam-split>*{max-height:none}}.auth-page{background:radial-gradient(circle at 20% 10%, var(--color-primary-soft), transparent 50%), var(--color-page);place-items:center;min-height:100vh;padding:24px;display:grid}.auth-card{width:100%;max-width:420px}.spinner{border:3px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;width:22px;height:22px;animation:.8s linear infinite spin;display:inline-block}.leaderboard-row{border-bottom:1px solid var(--color-border);grid-template-columns:48px 1fr auto;align-items:center;padding:14px 4px;display:grid}.leaderboard-row.is-me{background:var(--color-primary-soft);border-radius:10px}.rank{text-align:center;font-size:1.15rem;font-weight:800}.tab-switch{background:var(--color-surface-soft);border-radius:12px;gap:4px;padding:4px;display:inline-flex}.tab-switch button{cursor:pointer;color:var(--color-muted);background:0 0;border:none;border-radius:9px;padding:7px 14px;font-weight:600}.tab-switch button.is-active{background:var(--color-surface);color:var(--color-text);box-shadow:var(--shadow-card)}@keyframes spin{to{transform:rotate(360deg)}}@keyframes shake{25%{transform:translate(-5px)}75%{transform:translate(5px)}}@keyframes pulse{50%{opacity:.7}}@keyframes pop{0%{transform:scale(.4)}80%{transform:scale(1.15)}to{transform:scale(1)}}.lesson-node__circle.is-locked{background:var(--color-border);cursor:not-allowed;box-shadow:0 6px #c9ced8}.lesson-shell{background:var(--c-bg)}.option-button{border:1.5px solid var(--c-line-strong);border-radius:var(--r-md);box-shadow:var(--gloss-top), 0 4px 10px -8px rgba(var(--shadow-rgb), .35);transition:background-color var(--dur-micro) var(--ease-out), border-color var(--dur-micro) var(--ease-out), transform var(--dur-press) var(--ease-out)}.option-button:active:not(:disabled){transform:scale(.98)}.option-button__key{border-width:1.5px;border-color:var(--c-line-strong)}.option-button.is-selected{border-color:var(--c-primary);background:var(--c-primary-soft);box-shadow:0 0 0 3px color-mix(in srgb, var(--c-primary) 18%, transparent)}.option-button.is-selected .option-button__key{border-color:var(--c-primary);background:var(--c-primary);color:var(--c-on-primary)}.option-button.is-correct{border-color:var(--c-success);background:var(--c-success-soft)}.option-button.is-wrong{border-color:var(--c-oops);background:var(--c-oops-soft)}.word-chip{border:1.5px solid var(--c-line-strong);box-shadow:var(--gloss-top), 0 3px 8px -6px rgba(var(--shadow-rgb), .35);border-radius:14px}.word-chip.is-selected{border-color:var(--c-primary);background:var(--c-primary-soft)}.word-chip.is-wrong{border-color:var(--c-oops);background:var(--c-oops-soft);animation:ds-nudge .26s var(--ease-out)}.inline-blank-input{border-bottom-color:var(--c-primary)}.speaker-button{background:radial-gradient(circle at 30% 22%, #ffffff73 0 10%, transparent 34%), linear-gradient(180deg, color-mix(in srgb, var(--skill-listening) 78%, #fff) 0%, var(--skill-listening) 55%, color-mix(in srgb, var(--skill-listening) 80%, #0b3a6e) 100%);color:#fff;box-shadow:inset 0 1px 0 #ffffff80, 0 8px 16px -8px color-mix(in srgb, var(--skill-listening) 75%, transparent);transition:transform var(--dur-press) var(--ease-out);border-radius:32%}.speaker-button--small{background:color-mix(in srgb, var(--skill-listening) 14%, var(--c-surface));color:color-mix(in srgb, var(--skill-listening) 70%, var(--c-ink));box-shadow:var(--gloss-top), inset 0 0 0 1px color-mix(in srgb, var(--skill-listening) 30%, transparent)}.speaker-button:active{transform:scale(.94)}.inline-speaker{color:color-mix(in srgb, var(--skill-listening) 70%, var(--c-ink))}.microphone-button{border-radius:var(--r-lg);border-color:color-mix(in srgb, var(--skill-speaking) 45%, var(--c-line));background:color-mix(in srgb, var(--skill-speaking) 10%, var(--c-surface));color:var(--c-ink)}.microphone-button.is-active{border-color:var(--c-red);background:var(--c-red-soft);color:var(--c-red-ink)}.passage-box{border-radius:var(--r-lg)}.feedback-footer{border-radius:var(--r-xl) var(--r-xl) 0 0;box-shadow:0 -18px 40px -24px rgba(var(--shadow-rgb), .35);border-top:none}.feedback-footer.is-correct{box-shadow:inset 0 3px 0 var(--c-success), 0 -18px 40px -24px rgba(var(--shadow-rgb), .35)}.feedback-footer.is-wrong{background:var(--c-oops-soft);box-shadow:inset 0 3px 0 var(--c-oops), 0 -18px 40px -24px rgba(var(--shadow-rgb), .35)}.feedback-footer.is-wrong .feedback-footer__title{color:var(--c-oops-ink)}.feedback-footer__title,.word-card__word,.flashcard__word,.rank,.exercise-instruction{font-family:var(--font-display)}.teaching-card{border-radius:var(--r-xl);box-shadow:var(--gloss-top), var(--shadow-raised)}.example-list li,.criteria-item{border-radius:var(--r-md)}.word-card{border-radius:var(--r-lg);box-shadow:var(--gloss-top), var(--shadow-card)}.band-circle{background:var(--grad-navy);color:var(--c-on-navy);font-family:var(--font-display);box-shadow:var(--gloss-top), 0 8px 16px -8px color-mix(in srgb, var(--c-navy) 70%, transparent)}.stars{color:var(--c-gold)}.mind-map__step-number,.mind-map__level.is-current .mind-map__circle{color:var(--c-on-navy)}.mind-map__level.is-done .mind-map__circle{color:var(--c-surface)}.lesson-node__circle{box-shadow:var(--gloss-top), 0 10px 18px -10px color-mix(in srgb, var(--node-color) 70%, transparent)}.lesson-node__circle:disabled,.lesson-node__circle.is-locked{box-shadow:none}.skill-tab{border-radius:var(--r-pill);border-width:1.5px}.exam-shell{background:var(--c-surface)}.exam-header{color:#fff;background:linear-gradient(#2b3a8f,#222f7a)}.exam-timer.is-urgent{background:var(--c-oops);color:#1e2347}.exam-subheader{background:var(--c-surface-2)}.exam-split>:first-child{border-right-color:var(--c-surface-2)}.exam-question__number{border-color:var(--c-ink)}.exam-navigator button{background:var(--c-surface);border-color:var(--c-line-strong);color:var(--c-ink);border-radius:8px}.exam-navigator button.is-answered{color:#fff;background:#2b3a8f;border-color:#2b3a8f}.result-mark.is-correct{background:var(--grad-success);color:#1e2347}.result-mark.is-wrong{background:var(--grad-oops);color:#1e2347}.chart-box{color:#1e2347}.auth-page{background:radial-gradient(circle at 12% 8%, color-mix(in srgb, var(--c-primary) 20%, transparent), transparent 42%), radial-gradient(circle at 92% 92%, color-mix(in srgb, var(--c-navy) 12%, transparent), transparent 45%), var(--c-bg)}.auth-card{border-radius:var(--r-xl)}.spinner{border-color:var(--c-surface-2);border-top-color:var(--c-primary)}.leaderboard-row.is-me{border-radius:var(--r-md)}.tab-switch{border-radius:var(--r-pill);box-shadow:inset 0 1px 2px rgba(var(--shadow-rgb), .1)}.tab-switch button{border-radius:var(--r-pill)}.tab-switch button.is-active{box-shadow:var(--gloss-top), 0 3px 8px -3px rgba(var(--shadow-rgb), .3)}.toast-stack{z-index:60;flex-direction:column;gap:8px;max-width:380px;display:flex;position:fixed;top:76px;right:20px}.toast{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);box-shadow:var(--shadow-raised);align-items:center;gap:10px;padding:12px 14px;animation:.25s toast-in;display:flex}.toast__icon{font-size:1.4rem}.toast__text{flex:1;font-size:.93rem;font-weight:600}.toast__close{color:var(--color-muted);cursor:pointer;background:0 0;border:none;font-size:1.2rem}@keyframes toast-in{0%{opacity:0;transform:translate(30px)}}.player-avatar{border-radius:50%;flex:none;place-items:center;display:inline-grid;position:relative}.player-avatar__inner{background:var(--color-surface);border-radius:50%;place-items:center;width:100%;height:100%;line-height:1;display:grid}.player-avatar__dot{border:2px solid var(--color-surface);background:#c4c9d4;border-radius:50%;width:28%;min-width:9px;height:28%;min-height:9px;position:absolute;bottom:0;right:0}.player-name{flex-direction:column;line-height:1.2;display:inline-flex}.player-name__title{color:var(--color-muted);font-size:.75rem;font-weight:500}.flag-image{object-fit:cover;border-radius:6px;box-shadow:0 1px 4px #00000040}.emoji-image{display:inline-block}.flashcard{perspective:1200px;cursor:pointer;outline:none;height:420px}.chat-panel{flex-direction:column;flex:1;min-height:0;display:flex}.chat-system{text-align:center;background:#fff7db;border:1px solid #f5d76e;border-radius:999px;align-self:center;margin:6px 0;padding:4px 14px;font-size:.83rem}.chat-row{align-items:flex-end;gap:8px;display:flex}.chat-row.is-mine{justify-content:flex-end}.toast-stack{top:20px;right:20px}.toast{box-shadow:var(--gloss-top), var(--shadow-pop);animation:ds-rise-in .26s var(--ease-spring) both;border-radius:18px;gap:12px;padding:12px 10px 12px 16px}.toast__close{border-radius:50%;place-items:center;width:30px;height:30px;display:grid}.toast__close:hover{background:var(--c-surface-2)}.player-avatar__inner{background:radial-gradient(circle at 30% 22%, #fff9 0 8%, transparent 30%), var(--c-surface)}.player-avatar__dot{background:var(--c-line-strong)}.player-avatar__dot.is-online{background:var(--c-success)}.chat-system{background:var(--c-gold-soft);border-color:color-mix(in srgb, var(--c-gold) 50%, transparent);color:var(--c-ink)}@media (width<=1023px){.toast-stack{top:76px}}