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8px);right:0}.empty{gap:var(--s-2);padding:var(--s-5);border:1.5px dashed var(--c-line);border-radius:var(--r-lg);background:var(--c-surface);justify-items:start;display:grid}@supports (color:color-mix(in lab,red,red)){.empty{background:color-mix(in srgb,var(--c-surface) 60%,transparent)}}.empty-line{padding:var(--s-3) 0}.empty-cta{text-align:left;padding:var(--s-4);border-radius:var(--r-md);border:1.5px dashed var(--c-line);color:var(--c-primary-ink);background:0 0;font-weight:700}.bar{background:var(--c-surface-2);border-radius:3px;height:6px;display:block;overflow:hidden}.bar span{background:var(--c-xp-fill);border-radius:3px;height:100%;display:block}.status-dot{border-radius:50%;flex:none;width:10px;height:10px;display:inline-block}.status-dot.open{background:var(--c-bad);box-shadow:0 0 0 3px var(--c-bad-soft)}.status-dot.fixed{background:var(--c-good);box-shadow:0 0 0 3px 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h2{font-size:var(--t-xl)}.sheet-body{gap:var(--s-4);display:grid;position:relative}@media(min-width:720px){.sheet-wrap{padding:var(--s-5);align-items:center}.sheet{border-radius:var(--r-xl);max-width:560px;padding:var(--s-5)}.sheet--wide{max-width:820px}.sheet-wrap--side{justify-content:flex-end;align-items:stretch;padding:0}.sheet--side{border-radius:var(--r-xl) 0 0 var(--r-xl);max-width:480px;height:100%;max-height:none;animation:slide .22s var(--ease)}}@keyframes fade{0%{opacity:0}}@keyframes rise{0%{opacity:.6;transform:translateY(24px)}}@keyframes slide{0%{opacity:.6;transform:translate(24px)}}.hero{border-radius:var(--r-xl);min-height:300px;padding:var(--s-5);background:linear-gradient(165deg,var(--sky-top) 0%,var(--sky-mid) 52%,var(--sky-low) 100%);border:1px solid var(--c-line);position:relative;overflow:hidden}@supports (color:color-mix(in lab,red,red)){.hero{border:1px solid color-mix(in srgb,var(--c-line) 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var(--c-line);background:var(--c-surface);width:104px;color:var(--c-ink);font-size:var(--t-xs);text-align:center;flex:none;justify-items:center;gap:4px;padding:8px;font-weight:700;line-height:1.2;display:grid}.deck-chip.on{border-color:var(--c-primary);background:var(--c-primary-soft)}.deck-chip-art{width:84px;height:52px}.deck-progress{background:var(--c-line);border-radius:3px;height:6px;overflow:hidden}.deck-progress span{background:linear-gradient(90deg,var(--c-primary),var(--c-accent));height:100%;transition:width .4s var(--ease);display:block}.deck-count{margin:0}.card-art{width:100%;height:auto;display:block;overflow:visible}.flash3d{perspective:1400px;touch-action:pan-y;-webkit-user-select:none;user-select:none;cursor:pointer;transition:transform .22s var(--ease),opacity .22s;outline:none;position:relative}.flash3d:focus-visible .flash-side{outline:3px solid var(--c-primary);outline-offset:3px}.flash3d.leave-right{opacity:0;transform:translate(110%)rotate(10deg)!important}.flash3d.leave-left{opacity:0;transform:translate(-110%)rotate(-10deg)!important}.flash-inner{min-height:min(66vh,600px);transform-style:preserve-3d;transition:transform .55s cubic-bezier(.3,1.3,.5,1);position:relative}.flash-inner.flipped{transform:rotateY(180deg)}.flash-side{gap:var(--s-3);padding:var(--s-5) var(--s-4);border-radius:var(--r-lg);background:var(--c-surface);border:1px solid var(--c-line);box-shadow:var(--shadow-lift);backface-visibility:hidden;grid-template-rows:auto minmax(0,1fr) auto auto;display:grid;position:absolute;top:0;right:0;bottom:0;left:0;overflow-y:auto}.flash-side.back{background:linear-gradient(180deg,var(--c-primary-soft),var(--c-surface) 55%);border-color:var(--c-primary);grid-template-rows:auto auto 1fr auto;transform:rotateY(180deg)}.flash-art{place-self:center;max-width:560px;min-height:0;max-height:100%}.front .flash-art{height:100%;max-height:38vh}.flash-art--sm{max-width:360px;max-height:22vh}.flash-q{font-family:var(--f-display);text-align:center;text-wrap:balance;font-size:clamp(1.6rem,6.4vw,2.4rem);font-weight:700;line-height:1.15}.flash-a{text-align:center;text-wrap:pretty;align-self:center;font-size:clamp(1.15rem,4.6vw,1.5rem);line-height:1.45}.flash-a .katex,.flash-q .katex{font-size:1.05em}.flash-hint{font-size:var(--t-xs);color:var(--c-muted);letter-spacing:.04em;justify-self:center;font-weight:700}.swipe-stamp{border-radius:var(--r-md);font-weight:800;font-size:var(--t-lg);text-transform:uppercase;letter-spacing:.06em;background:var(--c-surface);pointer-events:none;border:3px solid;padding:6px 14px;position:absolute;top:22px}.swipe-stamp.good{color:var(--c-good);border-color:var(--c-good);left:20px;transform:rotate(-10deg)}.swipe-stamp.again{color:var(--c-bad);border-color:var(--c-bad);right:20px;transform:rotate(10deg)}.flash3d.hint-good .flash-side.back{border-color:var(--c-good)}.flash3d.hint-again .flash-side.back{border-color:var(--c-bad)}.rate-grid{gap:var(--s-2);grid-template-columns:repeat(4,minmax(0,1fr));display:grid}.rate-grid .rate{min-height:68px;font-size:var(--t-lg)}.reveal-btn{min-height:60px;font-size:var(--t-lg)}.swipe-help{margin:0}.kbd-help{display:none}.done-art{max-width:280px;margin:0 auto}@media(min-width:760px){.kbd-help{display:inline}.flash-side{padding:var(--s-6)}}@media(max-width:420px){.rate-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(prefers-reduced-motion:reduce){.flash-inner,.flash3d{transition:none}}.cards-head{justify-content:space-between;align-items:baseline;gap:var(--s-2);flex-wrap:wrap;display:flex}.cards-head h1{font-size:var(--t-2xl);margin:0}.flash-inner{height:clamp(400px,100dvh - 380px,620px);min-height:0}@media(max-width:759px){.deck-chip{width:84px;padding:6px;font-size:11px}.flash-side{padding:var(--s-4);gap:var(--s-2)}.front .flash-art{max-height:34vh}.cards-head h1{font-size:var(--t-xl)}.deck-chips{padding-bottom:4px}.deck-chip{border-radius:var(--r-pill);white-space:nowrap;width:auto;font-size:var(--t-sm);grid-template-columns:auto auto;align-items:center;gap:6px;padding:4px 12px 4px 6px}.deck-chip-art{width:36px;height:24px}.flash-inner{height:clamp(280px,100dvh - 380px,600px)}.rate-grid,.reveal-btn{bottom:calc(72px + env(safe-area-inset-bottom,0px));z-index:3;position:sticky}.rate-grid{background:var(--c-ground)}@supports (color:color-mix(in lab,red,red)){.rate-grid{background:color-mix(in srgb,var(--c-ground) 92%,transparent)}}.rate-grid{-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);padding:6px 0}}@media(max-width:759px)and (max-height:700px){.front .flash-art{max-height:24vh}.flash-q{font-size:1.5rem}}.paper-gate{max-width:560px;padding:var(--s-4);gap:var(--s-3);align-content:start;min-height:60vh;margin:0 auto;display:grid}.paper-gate h1{align-items:center;gap:var(--s-2);font-size:1.35rem;display:flex}.paper-gate .btn{justify-self:start}.captcha-slot:empty{display:none}.account--setup{border-color:var(--c-xp)}.account--setup .account-label{display:inline}.conn{position:relative}.conn-btn{white-space:nowrap;border-radius:var(--r-pill);border:1px solid var(--c-line);background:var(--c-surface);min-height:36px;color:var(--c-ink);font-size:var(--t-sm);align-items:center;gap:6px;padding:0 10px;font-weight:600;display:inline-flex}.conn-dot{background:var(--c-muted);border-radius:50%;flex:none;width:8px;height:8px}.conn--online .conn-dot{background:var(--c-good)}.conn--offline .conn-dot,.conn--unreachable .conn-dot{background:var(--c-xp)}.conn--offline,.conn--unreachable{background:var(--c-xp-soft)}.conn-label{display:none}@media(min-width:720px){.conn-label{display:inline}}.conn--offline .conn-label,.conn--unreachable .conn-label{display:inline}.conn-pop{z-index:30;width:min(300px,100vw - 32px);padding:var(--s-3);background:var(--c-surface);color:var(--c-ink);border:1px solid var(--c-line);border-radius:var(--r-md);box-shadow:var(--shadow-pop);gap:var(--s-1);font-size:var(--t-sm);display:grid;position:absolute;top:calc(100% + 8px);right:0}.conn-pop .eyebrow{margin:var(--s-2) 0 0}.conn-pop ul{gap:4px;margin:0;padding:0;list-style:none;display:grid}.conn-pop li{padding-left:20px;position:relative}.conn-pop li:before{font-weight:800;position:absolute;left:0}.conn-pop li.ok:before{content:"✓";color:var(--c-good)}.conn-pop li.wait:before{content:"…";color:var(--c-xp)}@media(max-width:559px){.conn{position:static}.conn-pop{left:var(--s-4);right:var(--s-4);width:auto;position:fixed;top:64px}}@media(max-width:439px){.brand-name,.conn-btn svg{display:none}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-ordinal{syntax:"*";inherits:false}@property --tw-slashed-zero{syntax:"*";inherits:false}@property --tw-numeric-figure{syntax:"*";inherits:false}@property --tw-numeric-spacing{syntax:"*";inherits:false}@property --tw-numeric-fraction{syntax:"*";inherits:false}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}