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p{color:var(--ink-2);max-width:60ch;font-size:13.5px;line-height:1.5}.patterns-empty .btn{margin-top:4px}.patterns-empty-tans{gap:6px;margin-bottom:2px;display:flex}.patterns-empty-tans i{background:var(--tan-3);border-radius:1.5px;width:10px;height:10px;transform:rotate(45deg)}.patterns-empty-tans i:nth-child(2){background:var(--tan-2);transform:rotate(20deg)}.patterns-empty-tans i:nth-child(3){background:var(--tan-5);transform:rotate(-10deg)}.errors-side{top:var(--page-y);position:sticky}.interference{background:var(--night);color:var(--night-ink);box-shadow:none;gap:10px;display:grid}.interference h2{color:var(--night-ink)}.interference-sub{color:var(--night-ink-2);font-size:12.5px;line-height:1.45}.interference-list{gap:6px;display:grid}.interference-item{border-radius:var(--r-card-sm);background:var(--night-2);grid-template-columns:8px minmax(0,1fr);gap:2px 10px;padding:9px 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0;display:grid}.quiet-tan{background:var(--tan-6);border-radius:1.5px;width:7px;height:7px;margin-top:6px;transform:rotate(45deg)}.quiet-tan--said{background:var(--tan-4)}.quiet-col{gap:1px;min-width:0;display:grid}.quiet-label{color:var(--ink);overflow-wrap:anywhere;font-size:13.5px;font-weight:550}.quiet-sub{color:var(--ink-3);font-size:12px}@media (prefers-reduced-motion:no-preference){.errors-side>*,.patterns-empty,.pattern-list>.pattern{animation:rise var(--dur-3) var(--ease-out) backwards;animation-delay:calc(80ms + var(--i,0) * var(--stagger))}.errors-side>*{animation-delay:.16s}.errors-side>:nth-child(2){animation-delay:.2s}.errors-side>:nth-child(3){animation-delay:.24s}.rhythm-mark{animation:rhythm-in .46s var(--ease-spring) backwards;animation-delay:calc(.22s + var(--i,0) * 30ms)}@keyframes rhythm-in{0%{opacity:0;transform:rotate(-90deg)scale(.2)}}.pattern-body>*{animation:rise .32s var(--ease-out) 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(width<=720px){.pattern-head{grid-template-columns:12px minmax(0,1fr) 16px;gap:8px 12px;padding:12px 14px}.pattern-head .pattern-trend{grid-area:2/2;justify-self:start}.pattern-head .rhythm{grid-area:2/2;justify-self:end}.pattern-head .pattern-chev{grid-area:1/3}.pattern-body{padding:0 14px 14px}.drill{padding:12px 14px}.drill-phrase{font-size:18px}.errors-side{grid-template-columns:minmax(0,1fr)}}.timeline{gap:12px;max-width:920px;display:grid}.timeline-day{padding-bottom:10px}.timeline-day .card-head{padding-bottom:4px}.timeline-count{color:var(--ink-3);font-size:12px}.timeline-entries{display:grid}.entry-session{position:relative}.entry-session-link{transition:background-color var(--dur-1) ease;border-radius:10px;grid-template-columns:28px minmax(0,1fr) auto 14px;align-items:center;gap:12px;margin:0 -10px;padding:9px 46px 9px 10px;text-decoration:none;display:grid}.entry-session-link:hover{background:var(--ground);text-decoration:none}.entry-session-ico,.recap-ico{background:var(--good-bg);width:28px;height:28px;color:var(--good);transition:transform var(--dur-3) var(--ease-spring);border-radius:8px;place-items:center;display:grid}.entry-session[data-mode=reading] .entry-session-ico,.recap-ico[data-mode=reading]{background:var(--easy-bg);color:var(--easy)}.entry-session[data-mode=drill] .entry-session-ico,.recap-ico[data-mode=drill]{background:var(--hard-bg);color:var(--hard)}.entry-session-link:hover 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var(--dur-1) ease, background-color var(--dur-1) ease, color var(--dur-1) ease;margin-top:-15px;position:absolute;top:50%;right:-4px}.entry-session:hover .entry-session-delete,.entry-session-delete:focus-visible{opacity:1}.entry-session-delete:hover{color:var(--again);background:var(--again-bg)}@media (hover:none){.entry-session-delete{opacity:1}}.timeline .list-more{justify-content:center;padding-top:4px;display:flex}.sessions-empty{justify-items:start;gap:8px;max-width:640px;padding:20px 22px;display:grid}.sessions-empty p{color:var(--ink-2);max-width:56ch;font-size:13.5px;line-height:1.5}.sessions-empty .btn{margin-top:6px}.recap-head{align-items:center;gap:12px;display:flex}.recap-ico{border-radius:11px;flex:none;width:40px;height:40px}.recap-head-col{gap:2px;min-width:0;display:grid}.recap-kind{color:var(--ink-3);font-size:13px}.recap-top{grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);align-items:stretch;gap:10px 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polygon:nth-child(6){fill:var(--tan-6)}.auth-brand .tangram--loose .tangram-slots polygon:nth-child(7){fill:var(--tan-7)}.auth-brand-quote{font-family:var(--font-display);letter-spacing:-.01em;color:var(--night-ink);font-size:16px;font-weight:600;line-height:1.35}.auth-card{align-content:start;gap:22px;padding:26px 30px 28px;display:grid}.auth-form{display:grid}.auth-form h1{font-size:var(--t-title);font-weight:650;line-height:1.15}.auth-form .auth-sub{font-size:var(--t-body);color:var(--ink-2);margin-top:6px;line-height:1.5}.auth-form form{gap:12px;display:grid}.auth-form .input{gap:10px;min-height:46px;padding-inline:14px;font-size:16px}.auth-form .btn--block{border-radius:var(--r-btn);min-height:46px;font-size:var(--t-body)}.auth-form .btn--block 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0;gap:6px;display:flex}.code-cell{background:var(--raised);min-width:0;height:58px;box-shadow:inset 0 0 0 1px var(--rule);color:var(--ink);font-family:var(--font-display);font-size:var(--t-title);font-variant-numeric:tabular-nums;transition:box-shadow var(--dur-1) ease, background-color var(--dur-1) ease, opacity var(--dur-2) ease;border-radius:12px;flex:1 1 0;place-items:center;padding-bottom:6px;font-weight:600;line-height:1;display:grid;position:relative}.code-cell.is-set{background:var(--ground)}.code-cell.is-active{box-shadow:inset 0 0 0 1.5px var(--ink)}.code-cell.is-selected{background:var(--marker);box-shadow:inset 0 0 0 1px var(--marker-tip)}.code-caret{background:var(--ink);border-radius:1px;width:2px;height:24px;margin-top:6px}.code-piece{background:var(--tan-1);clip-path:polygon(0 100%,50% 0,100% 100%);width:12px;height:6px;margin-left:-6px;position:absolute;bottom:8px;left:50%}.code-cell[data-k="2"] .code-piece{background:var(--tan-2)}.code-cell[data-k="3"] .code-piece{background:var(--tan-3);clip-path:polygon(0 0,0 100%,100% 100%);width:8px;height:8px;margin-left:-4px}.code-cell[data-k="4"] .code-piece,.code-cell[data-k="5"] .code-piece{background:var(--tan-4);width:8px;height:4px;margin-left:-4px}.code-cell[data-k="5"] .code-piece{background:var(--tan-5)}.code-cell[data-k="6"] .code-piece{background:var(--tan-6);clip-path:polygon(50% 0,100% 50%,50% 100%,0 50%);width:7px;height:7px;margin-left:-3.5px}.code--invalid .code-cell.is-set{background:var(--set-soft);box-shadow:inset 0 0 0 1px var(--accent-stroke);color:var(--set-ink)}.code--invalid .code-piece{opacity:0}.code--busy .code-cell{opacity:.55}.code input{color:#0000;caret-color:#0000;letter-spacing:1em;cursor:text;-webkit-text-fill-color:transparent;background:0 0;border:0;outline:none;width:100%;height:100%;padding:0;font-size:16px;position:absolute;inset:0}.code input::selection{color:#0000;-webkit-text-fill-color:transparent;background:0 0}.code input:-webkit-autofill{transition:background-color 0s 600000s}.consent-page{align-content:center;place-items:center;gap:14px;min-height:100dvh;padding:40px 16px;display:grid}.consent-card{background:var(--raised);width:min(420px,100%);box-shadow:var(--ring);border-radius:20px;justify-items:center;padding:26px 26px 24px;display:grid}.consent-marks{align-items:center;display:flex}.consent-logo{background:var(--ink);width:44px;height:44px;color:var(--ground);border-radius:12px;place-items:center;display:grid;overflow:hidden}.consent-logo--claude{background:var(--claude);color:#fff}.consent-logo img{object-fit:cover;width:100%;height:100%}.consent-marks .mark polygon{stroke:var(--raised)}.consent-dots{gap:5px;padding:0 12px;display:flex}.consent-dots span{background:var(--tan-2);border-radius:1.5px;width:7px;height:7px;transform:rotate(45deg)}.consent-dots span:nth-child(2){background:var(--tan-3)}.consent-dots span:last-child{background:var(--set)}.consent-title{text-align:center;max-width:16em;margin-top:18px;font-size:20px;line-height:1.2}.user-chip{border-radius:var(--r-pill);background:var(--ground);font-size:var(--t-meta);color:var(--ink-2);align-items:center;gap:8px;margin-top:10px;padding:4px 12px 4px 4px;display:inline-flex}.scope-box{width:100%;margin-top:14px;display:grid}.scope-row{align-items:center;gap:12px;padding:8px 0;display:flex}.scope-ico{background:var(--good-bg);width:28px;height:28px;color:var(--good);border-radius:8px;flex:none;place-items:center;display:grid}.scope-row:nth-child(2) .scope-ico{background:var(--easy-bg);color:var(--easy)}.scope-row:nth-child(3) .scope-ico{background:var(--again-bg);color:var(--again)}.scope-row:nth-child(4) .scope-ico{background:var(--hard-bg);color:var(--hard)}.scope-col{gap:1px;min-width:0;display:grid}.scope-title{font-size:var(--t-body);font-weight:600}.scope-desc{font-size:var(--t-meta);color:var(--ink-3);line-height:1.4}.consent-cant{font-size:var(--t-meta);color:var(--ink-2);text-align:center;max-width:36ch;margin-top:14px;line-height:1.5}.consent-actions{grid-template-columns:1fr 1.6fr;gap:8px;width:100%;margin-top:16px;display:grid}.consent-actions .btn{min-height:40px}.consent-note{font-size:var(--t-meta);color:var(--ink-3);text-align:center}@media (prefers-reduced-motion:no-preference){.auth-pair{animation:dialog-in .52s var(--ease-spring) backwards}.auth-form>*{animation:rise var(--dur-3) var(--ease-out) backwards;animation-delay:80ms}.auth-form>:nth-child(2){animation-delay:.12s}.auth-form>:nth-child(n+3){animation-delay:.16s}.auth-brand-quote{animation:fade-in .64s var(--ease-out) backwards;animation-delay:.36s}.code-caret{animation:1s linear infinite caret-blink}.code-piece{--fx:0;--fy:8px;--fr:40deg;animation:piece-dock var(--dur-2) var(--ease-spring) backwards}.code--invalid .code-cells{animation:nudge .36s var(--ease-out)}.consent-card{animation:dialog-in .52s var(--ease-spring) backwards}.consent-dots span{animation:consent-travel 1.8s var(--ease-out) infinite}.consent-dots span:nth-child(2){animation-delay:.16s}.consent-dots span:nth-child(3){animation-delay:.32s}@keyframes consent-travel{0%,to{opacity:.5;transform:translate(0)rotate(45deg)}50%{opacity:1;transform:translate(5px)rotate(225deg)scale(1.2)}}.scope-row{animation:rise var(--dur-3) var(--ease-out) backwards;animation-delay:calc(.12s + var(--i,0) * var(--stagger))}}@media (width<=760px){.auth-page{align-items:start;padding:20px 16px 40px}.auth-pair{grid-template-columns:minmax(0,1fr);width:min(420px,100%)}.auth-brand{grid-template-rows:none;grid-template-columns:56px minmax(0,1fr);align-items:center;gap:14px;padding:14px 16px}.auth-brand-figure .tangram{width:52px}.auth-brand-figure .tangram--loose{width:56px}.auth-brand-quote{font-size:var(--t-small);font-weight:550}.auth-card{gap:18px;padding:20px 20px 22px}.code-cells{gap:10px}.code-group{gap:5px}.code-cell{height:54px}.consent-card{padding:22px 18px 20px}}.mk{--mk-w:1160px;--mk-x:clamp(16px, 4vw, 40px);--mk-pad:max(var(--mk-x), calc((100% - var(--mk-w)) / 2));overflow-x:clip}.mk-nav,.mk-hero,.mk-method,.mk-errors,.mk-name,.mk-band,.mk-under,.mk-final,.mk-footer{padding-inline:var(--mk-pad)}.mk-nav{justify-content:space-between;align-items:center;gap:24px;padding-block:16px;display:flex}.mk-nav-links{font-size:var(--t-body);color:var(--ink-2);gap:26px;font-weight:550;display:flex}.mk-nav-links a{transition:color var(--dur-1) ease;position:relative}.mk-nav-links a:hover{color:var(--ink);text-decoration:none}.mk-nav-links a:after{content:"";background:var(--set);transform-origin:0;height:2px;transition:transform var(--dur-2) var(--ease-out);border-radius:1px;position:absolute;bottom:-5px;left:0;right:0;transform:scaleX(0)}.mk-nav-links a:hover:after{transform:none}.mk-nav-actions{gap:6px;display:flex}.mk-hero{grid-template-columns:minmax(0,6fr) minmax(0,5fr);align-items:center;gap:32px clamp(32px,4.5vw,64px);padding-block:40px 88px;display:grid}.mk-hero-copy{justify-items:start;gap:20px;display:grid}.mk-headline{letter-spacing:-.035em;font-size:clamp(34px,4.4vw,56px);font-weight:680;line-height:1.02}.mk-headline span{white-space:nowrap;display:block}.mk-subhead{color:var(--ink-2);max-width:44ch;font-size:17px;line-height:1.55}.mk-cta-row{flex-wrap:wrap;gap:10px;display:flex}.mk-cta-row .btn svg{transition:transform var(--dur-2) var(--ease-out)}.mk-cta-row .btn:hover svg{transform:translate(2px)}.mk-hero-note{font-size:var(--t-small);color:var(--ink-3)}.bring{border-radius:var(--r-card-lg);background:var(--raised);box-shadow:var(--ring);grid-template-columns:minmax(0,1fr);gap:14px;padding:18px 20px 20px;display:grid}.bring-head{justify-content:space-between;align-items:center;gap:12px;display:flex}.bring-title{font-family:var(--font-display);font-size:var(--t-heading);letter-spacing:-.01em;font-weight:650}.bring-title span{color:var(--ink)}.bring-pips{gap:6px;display:flex}.bring-pips span{background:var(--wait);width:8px;height:8px;transition:background-color var(--dur-2) ease, transform var(--dur-3) var(--ease-spring);border-radius:1.5px;transform:rotate(45deg)}.bring-pips span[data-on=true]{background:var(--c);transform:rotate(225deg)}.bring-figure{aspect-ratio:8.4/5.4;justify-self:center;align-items:end;width:min(100%,440px);padding-block:4px 8px;display:grid}.bring-line{font-size:var(--t-small);color:var(--ink-2);min-height:1.5em}.bring-line strong{color:var(--ink);font-weight:650}.bring-again{color:var(--ink);text-decoration:underline;-webkit-text-decoration-color:var(--set);text-decoration-color:var(--set);text-underline-offset:.2em;font-weight:600;text-decoration-thickness:1.5px}.bring-words{flex-wrap:wrap;gap:6px;display:flex}.bring-word{border-radius:var(--r-pill);background:var(--ground);min-height:34px;font-family:var(--font-display);letter-spacing:-.005em;transition:background-color var(--dur-2) ease, color var(--dur-2) ease, transform var(--dur-1) var(--ease-out);align-items:center;gap:7px;padding:0 12px 0 11px;font-size:14px;font-weight:650;display:inline-flex}.bring-tan{background:var(--ground-3);width:7px;height:7px;transition:background-color var(--dur-2) ease, transform var(--dur-3) var(--ease-spring);border-radius:1.5px;flex:none;transform:rotate(45deg)}.bring-gloss{font-family:var(--font-body);font-size:var(--t-small);color:var(--ink-3);transition:color var(--dur-2) ease;font-weight:450}.bring-word:hover{background:var(--ground-2);transform:translateY(-1px)}.bring-word:hover .bring-tan{transform:rotate(225deg)}.bring-word:active{transform:scale(.96)}.bring-word[aria-pressed=true]{background:var(--ink);color:var(--night-ink);cursor:default;transform:none}.bring-word[aria-pressed=true] .bring-tan{background:var(--c,var(--set));transform:rotate(225deg)}.bring-word[aria-pressed=true] .bring-gloss{color:var(--night-ink-2)}.mk-title{letter-spacing:-.025em;max-width:18em;font-size:clamp(26px,2.6vw,34px);font-weight:680;line-height:1.1}.mk-lede,.mk-body{color:var(--ink-2);max-width:52ch;font-size:16px;line-height:1.55}.mk-head{gap:10px;display:grid}.mk-method{gap:28px;padding-block:24px 88px;display:grid}.mk-loop{grid-template-columns:minmax(0,7fr) minmax(0,5fr);align-items:start;gap:18px;display:grid}.chat{border-radius:var(--r-card-lg);background:var(--raised);box-shadow:var(--ring);overflow:hidden}.chat-head{font-size:var(--t-small);color:var(--ink-3);justify-content:space-between;gap:12px;padding:14px 20px 0;display:flex}.chat-title{font-family:var(--font-display);font-size:var(--t-heading);color:var(--ink);letter-spacing:-.01em;font-weight:650}.chat-body{gap:10px;padding:16px 20px 20px;display:grid}.bubble{background:var(--ground);max-width:82%;font-size:var(--t-body);border-radius:16px 16px 16px 5px;padding:10px 14px;line-height:1.5}.bubble strong{color:var(--set-ink);font-weight:650}.bubble--me{background:var(--ink);color:var(--night-ink);border-radius:16px 16px 5px;justify-self:end}.chat-end{background:var(--good-bg);color:var(--good);font-size:var(--t-small);border-radius:10px;justify-self:start;align-items:center;gap:8px;margin-top:4px;padding:5px 12px 5px 10px;font-weight:600;display:inline-flex}.chat-end-tans{gap:3px;display:inline-flex}.chat-end-tans span{background:var(--tan-1);border-radius:1px;width:6px;height:6px;transform:rotate(45deg)}.chat-end-tans span:nth-child(2){background:var(--tan-2)}.chat-end-tans span:nth-child(3){background:var(--tan-3)}.word{border-radius:var(--r-card-lg);background:var(--raised);box-shadow:var(--ring);transition:transform var(--dur-3) var(--ease-spring);gap:6px;margin-top:40px;padding:20px 22px 22px;display:grid;transform:rotate(1.2deg)}.word:hover{transform:rotate(0)translateY(-2px)}.word-top{justify-content:space-between;align-items:baseline;gap:12px;display:flex}.word-lemma{font-family:var(--font-display);font-size:var(--t-display);letter-spacing:-.025em;font-weight:650;line-height:1.05}.word-level{border-radius:var(--r-pill);background:var(--easy-bg);color:var(--easy);font-size:var(--t-meta);padding:2px 9px;font-weight:650}.word-gloss{color:var(--ink);font-size:15px}.word-meta{font-size:var(--t-small);color:var(--ink-3);align-items:center;gap:8px;display:flex}.word-ex{border-radius:var(--r-card-sm);background:var(--ground);font-family:var(--font-display);letter-spacing:-.005em;margin-top:8px;padding:10px 12px;font-size:15px;font-weight:600;line-height:1.35}.word-note{font-size:var(--t-small);color:var(--ink-2)}.word-saved{font-size:var(--t-small);color:var(--set-ink);align-items:center;gap:8px;margin-top:6px;font-weight:600;display:flex}.word-saved-tan{background:var(--set);clip-path:polygon(0 100%,100% 100%,100% 0);width:12px;height:12px}.mk-steps{grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;display:grid}.mk-steps li{border-radius:var(--r-card);background:var(--raised);box-shadow:var(--ring);transition:transform var(--dur-2) var(--ease-out);align-content:start;gap:8px;padding:16px 18px 18px;display:grid}.mk-steps li:hover{transform:translateY(-2px)}.mk-steps h3{font-size:var(--t-heading);font-weight:650}.mk-steps p{font-size:var(--t-body);color:var(--ink-2);line-height:1.55}.mk-step-ico{background:var(--set-soft);border-radius:9px;place-items:center;width:32px;height:32px;margin-bottom:4px;display:grid}.mk-steps li:nth-child(2) .mk-step-ico{background:var(--good-bg)}.mk-steps li:nth-child(3) .mk-step-ico{background:var(--easy-bg)}.mk-tan{background:var(--tan-1);width:16px;height:16px;transition:transform var(--dur-3) var(--ease-spring)}.mk-steps li:hover .mk-tan{transform:rotate(-90deg)}.mk-tan--tri{clip-path:polygon(0 100%,100% 100%,0 0)}.mk-tan--square{background:var(--tan-3);clip-path:polygon(50% 0,100% 50%,50% 100%,0 50%)}.mk-tan--para{background:var(--tan-4);clip-path:polygon(0 100%,34% 0,100% 0,66% 100%)}.mk-errors{padding-block:0 88px}.mk-errors-panel{background:var(--night);color:var(--night-ink);border-radius:20px;grid-template-columns:minmax(0,6fr) minmax(0,5fr);align-items:center;gap:clamp(28px,4vw,56px);padding:clamp(28px,4vw,48px);display:grid}.mk-errors .mk-title{color:var(--night-ink)}.mk-errors-copy{gap:16px;display:grid}.mk-errors .mk-body{color:var(--night-ink-2);font-size:15px}.mk-points{gap:8px;margin-top:4px;display:grid}.mk-points li{font-size:var(--t-body);color:var(--night-ink);padding-left:22px;line-height:1.5;position:relative}.mk-points li:before{content:"";background:var(--tan-2);border-radius:1.5px;width:8px;height:8px;position:absolute;top:.48em;left:2px;transform:rotate(45deg)}.mk-points li:nth-child(2):before{background:var(--tan-5)}.mk-points li:nth-child(3):before{background:var(--tan-6)}.patterns{border-radius:var(--r-card);background:var(--night-2);gap:14px;padding:18px 20px 20px;display:grid}.patterns-head{font-family:var(--font-display);font-size:var(--t-heading);letter-spacing:-.01em;justify-content:space-between;gap:12px;font-weight:650;display:flex}.patterns-head span+span{font-family:var(--font-body);font-size:var(--t-meta);color:var(--night-ink-2);font-weight:500}.patterns-row{gap:6px;display:grid}.patterns-top{justify-content:space-between;align-items:baseline;gap:12px;display:flex}.patterns-label{font-family:var(--font-display);letter-spacing:-.005em;font-size:15px;font-weight:600}.patterns-trend{font-size:var(--t-small);color:var(--night-ink-2);white-space:nowrap}.patterns-bar{border-radius:var(--r-pill);background:var(--night-3);height:6px;display:block;overflow:hidden}.patterns-bar>span{border-radius:inherit;background:var(--tan-1);height:100%;transform:scaleX(var(--w,1));transform-origin:0;display:block}.patterns-row:nth-of-type(3) .patterns-bar>span{background:var(--tan-2)}.patterns-row:nth-of-type(4) .patterns-bar>span{background:var(--tan-3)}.patterns-row:nth-of-type(5) .patterns-bar>span{background:var(--tan-6)}.patterns-row:nth-of-type(6) .patterns-bar>span{background:var(--tan-5)}.patterns-foot{font-size:var(--t-small);color:var(--night-ink-2)}.mk-name{grid-template-columns:minmax(0,4fr) minmax(0,5fr) minmax(0,4fr);align-items:center;gap:clamp(18px,3vw,40px);padding-block:0 56px;display:grid}.mk-name figure,.mk-band,.mk-final-picture{margin:0}.mk-name img,.mk-band img,.mk-final-picture img{width:100%;height:auto;display:block}.mk-print{border-radius:var(--r-card);background:var(--raised);box-shadow:var(--ring);padding:10px 10px 12px}.mk-print img{border-radius:8px}.mk-name figcaption,.mk-band figcaption,.mk-final-picture figcaption{font-size:var(--t-small);color:var(--ink-3);margin-top:8px;line-height:1.45}.mk-print figcaption{padding-inline:2px}.mk-portrait{transform:rotate(-1.5deg)}.mk-portrait img{aspect-ratio:809/1040;object-fit:cover;object-position:center 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