.home-screen-hint[data-astro-cid-rnswefuy]{border:1px solid var(--border);background:var(--surface);width:min(720px,100% - 32px);color:var(--ink);font-family:var(--font-ui);border-radius:12px;grid-template-columns:40px minmax(0,1fr) 44px;align-items:center;gap:12px;margin:12px auto;padding:12px 8px 12px 16px;font-size:.875rem;line-height:1.4;display:grid}.home-screen-hint[data-astro-cid-rnswefuy][hidden],[data-astro-cid-rnswefuy][data-home-screen-lang][hidden]{display:none}.home-screen-hint[data-astro-cid-rnswefuy] strong[data-astro-cid-rnswefuy]{font-size:.875rem;font-weight:700}.home-screen-hint[data-astro-cid-rnswefuy] p[data-astro-cid-rnswefuy]{color:var(--muted);margin:4px 0 0;font-size:.8125rem}[data-astro-cid-rnswefuy][data-home-screen-dismiss]{width:44px;height:44px;color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:8px;place-items:center;padding:0;display:grid}[data-astro-cid-rnswefuy][data-home-screen-dismiss]:hover{background:var(--surface-warm);color:var(--ink)}[data-astro-cid-rnswefuy][data-home-screen-install]{border:1px solid var(--jade);background:var(--jade);min-height:44px;color:var(--surface);font:inherit;cursor:pointer;border-radius:8px;padding:8px 14px;font-weight:700}body:has(.app-shell--chat) .home-screen-hint[data-astro-cid-rnswefuy]{display:none}@media (width<=959px){.home-screen-hint[data-astro-cid-rnswefuy]{margin-bottom:calc(164px + env(safe-area-inset-bottom))}}@font-face{font-family:Hanken Grotesk;font-style:normal;font-weight:400 700;font-display:swap;src:url(/_astro/hanken-grotesk-latin-ext.BzvT_elb.woff2)format("woff2");unicode-range:U+100-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F}@font-face{font-family:Hanken Grotesk;font-style:normal;font-weight:400 700;font-display:swap;src:url(/_astro/hanken-grotesk-latin.KjBMhMia.woff2)format("woff2");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}:root{color-scheme:light;--paper:#f6f2ea;--surface:#fffdf8;--surface-warm:#efe9de;--ink:#23201b;--ink-hover:#3d3932;--muted:#746d62;--border:#e4ddd0;--border-dark:#bdb4a6;--cinnabar:#9a3b2c;--cinnabar-dark:#843027;--cinnabar-soft:#f4e1dc;--jade:#2f5a45;--jade-dark:#244735;--jade-soft:#e4ece5;--amber:#8b5e1a;--amber-soft:#f4e8ce;--proper-name:#75428f;--proper-name-soft:#eee3f4;--assessment-needs-work:#ffd4d5;--focus:var(--jade);--shadow:0 6px 24px #3c280a0b;--font-ui:"Hanken Grotesk", ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-hanzi:"Songti SC", "STSong", "Noto Serif CJK SC", serif}:where(button,a,input,select,textarea,summary,[tabindex]):focus-visible{outline:2px solid var(--focus);outline-offset:3px}*{box-sizing:border-box}html{background:var(--paper);min-width:320px}body{min-width:320px;min-height:100vh;color:var(--ink);background:var(--paper);font-family:var(--font-ui);text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;margin:0;line-height:1.5}button,input,select{color:inherit;font:inherit}button,select{cursor:pointer}a{color:inherit}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.app-shell{padding:0 32px 48px}.site-header{border-bottom:1px solid var(--border);background:var(--surface);grid-template-columns:1fr auto 1fr;align-items:center;gap:24px;min-height:76px;margin:0 -32px;padding:12px 32px;display:grid}.brand{align-items:center;gap:12px;text-decoration:none;display:inline-flex}.brand-mark{flex:none;width:40px;height:40px;display:block}.brand strong{letter-spacing:-.035em;font-size:1.1rem;display:block}.brand small{color:var(--muted);margin-top:1px;font-size:.76rem;display:none}.header-tools,.account-area{align-items:center;display:flex}.header-tools{justify-content:flex-end;gap:8px;min-width:0}.account-area{justify-content:flex-end;gap:10px;position:relative}.locale-switcher{background:var(--paper);border:0;border-radius:12px;flex:none;gap:2px;padding:3px;display:inline-flex}.locale-switcher button{min-width:34px;min-height:36px;color:var(--muted);background:0 0;border:0;border-radius:7px;padding:5px 7px;font-size:.75rem;font-weight:700}.locale-switcher button:hover{background:var(--surface);color:var(--ink)}.locale-switcher button.is-active{background:var(--surface);color:var(--ink);box-shadow:0 1px 3px #23201b12}.sync-label{--sync-ready-color:#2f5a45;max-width:150px;color:var(--muted);text-align:right;font-size:.75rem}.sync-label:before{box-sizing:border-box;background:var(--border-dark);content:"";vertical-align:1px;border-radius:50%;width:8px;height:8px;margin-right:7px;display:inline-block}.sync-synced:before{background:var(--sync-ready-color)}.sync-syncing:before{border:1.5px solid var(--border-dark);border-top-color:var(--sync-ready-color);background:0 0;animation:.8s linear infinite sync-spin}.sync-error:before,.sync-offline:before{background:var(--cinnabar)}.avatar-button{border:1px solid var(--border);background:var(--jade-soft);width:44px;height:44px;color:var(--jade);border-radius:50%;place-items:center;padding:0;font-size:.82rem;font-weight:600;display:grid}.account-menu-wrap{position:relative}.account-menu{z-index:50;border:1px solid var(--border);background:var(--surface);width:min(280px,100vw - 32px);box-shadow:var(--shadow);border-radius:14px;gap:3px;padding:16px;display:grid;position:absolute;top:calc(100% + 10px);right:0}.account-menu span{color:var(--muted);text-overflow:ellipsis;font-size:.83rem;overflow:hidden}.account-menu button{min-height:44px;color:var(--ink);text-align:left;background:0 0;border:0;border-radius:10px;margin-top:4px;padding:8px 10px;font-weight:500}.account-menu button:hover{background:var(--paper);color:var(--jade)}.view-tabs{background:var(--paper);border-radius:999px;gap:3px;padding:4px;display:flex}.view-tabs button{min-height:42px;color:var(--muted);background:0 0;border:0;border-radius:999px;justify-content:center;align-items:center;gap:6px;padding:8px 14px;font-size:.875rem;font-weight:600;display:flex;position:relative}.view-tabs button:after{content:none}.view-tabs button:hover{color:var(--ink)}.view-tabs button.is-active{color:var(--jade);background:var(--surface);box-shadow:0 1px 3px #23201b12}.view-tabs button.is-active:after{content:none}.count-pill{color:var(--muted);font-variant-numeric:tabular-nums;font-size:.75rem}.view-tabs .is-active .count-pill{color:var(--jade)}.inline-alert{border:1px solid var(--border);color:#64420f;background:#fffcf5b3;background:var(--amber-soft);border-color:#d7b275;border-radius:14px;align-items:center;gap:12px;margin-top:18px;padding:12px 16px;font-size:.86rem;display:flex}.text-button{min-height:44px;color:var(--cinnabar);text-underline-offset:3px;background:0 0;border:0;padding:5px 8px;font-size:.84rem;font-weight:600;text-decoration:underline #0000}.text-button:hover{text-decoration-color:currentColor}.align-left{justify-self:start;padding-left:0}.study-controls{margin:24px 0 28px}.study-toolbar,.study-toolbar-actions{align-items:center;gap:8px;display:flex}.study-toolbar{flex-wrap:wrap;justify-content:space-between}.study-toolbar-actions{margin-left:auto}.study-toolbar .button{gap:8px;min-width:0;padding-inline:14px}.study-toolbar .app-icon{width:18px;height:18px}.search-trigger.is-active{border-color:var(--jade);background:var(--jade-soft);color:var(--jade)}.search-row{margin-top:12px;display:flex}.search-row[hidden]{display:none}.search-field{flex:1;align-items:center;min-width:0;display:flex;position:relative}.search-field input{border:1px solid var(--border);background:var(--surface);border-radius:10px;width:100%;height:48px;padding:0 48px 0 44px}.search-field input::placeholder{color:var(--muted)}.search-field input:focus{border-color:var(--jade);background:var(--surface)}.search-icon{z-index:1;color:var(--muted);pointer-events:none;display:flex;position:absolute;left:16px}.search-field button{width:44px;height:44px;color:var(--muted);background:0 0;border:0;font-size:1.3rem;position:absolute;right:3px}.button{border:1px solid var(--border);background:var(--surface);border-radius:999px;justify-content:center;align-items:center;gap:10px;min-height:48px;padding:11px 18px;font-weight:600;line-height:1.2;transition:transform .15s,background-color .15s,box-shadow .15s;display:inline-flex}.button:hover{background:var(--surface-warm)}.button:active{transform:scale(.98)}.button:disabled{cursor:wait;opacity:.62;box-shadow:none;transform:none}.button-small{min-height:42px;padding:8px 14px;font-size:.83rem}.button-primary{border-color:var(--jade);background:var(--jade);color:var(--surface)}.button-primary:hover{border-color:var(--jade-dark);background:var(--jade-dark)}.button-secondary{border-color:var(--jade);background:var(--surface);color:var(--jade)}.button-secondary:hover{background:var(--jade-soft)}.button-danger{color:var(--surface);background:#8f2f28;border-color:#8f2f28}.button-danger:hover{background:#71231e;border-color:#71231e}.button-ink{border-color:var(--ink);background:var(--ink);color:var(--surface)}.filter-trigger{min-width:110px;display:inline-flex}.pack-trigger{background:var(--surface);min-width:96px;color:var(--jade)}.pack-trigger:before,.pack-trigger:after{content:none}.pack-trigger:hover{background:var(--jade-soft)}.pack-trigger.is-opening{background:var(--cinnabar-soft);animation:.16s ease-out both pack-trigger-open}.pack-trigger.is-opening:before{animation:.16s ease-out both pack-trigger-tear-top}.pack-trigger.is-opening:after{animation:.16s ease-out both pack-trigger-tear-bottom}.study-layout{display:block}.sheet label{color:var(--muted);gap:7px;font-size:.78rem;font-weight:600;display:grid}select{border:1px solid var(--border);background:var(--surface);width:100%;min-height:44px;color:var(--ink);border-radius:10px;padding:8px 34px 8px 11px}.session-panel{min-width:0}.session-progress{margin-bottom:13px}.session-progress>div:first-child{color:var(--muted);justify-content:space-between;align-items:center;gap:12px;margin-bottom:9px;font-size:.78rem;font-weight:600;display:flex}.direction-badge{color:var(--jade);font-size:.75rem}.progress-track{background:var(--border);border-radius:999px;height:6px;overflow:hidden}.progress-track span{border-radius:inherit;background:var(--jade);height:100%;transition:width .18s;display:block}.study-card{border:1px solid var(--border);background:var(--surface);min-height:360px;box-shadow:var(--shadow);border-radius:28px;position:relative;overflow:hidden}.study-card:before{content:none}.card-prompt{text-align:center;grid-template-columns:minmax(0,1fr);place-content:center;justify-items:center;min-height:360px;padding:56px 40px;display:grid}.eyebrow{color:var(--cinnabar);letter-spacing:.14em;text-transform:uppercase;margin:0;font-size:.68rem;font-weight:700}.card-prompt .eyebrow{color:var(--muted);letter-spacing:.08em;margin-bottom:24px;font-weight:500}.card-prompt h2[tabindex="-1"]:focus,.card-answer[tabindex="-1"]:focus{outline:none}.card-prompt h2{text-wrap:balance;overflow-wrap:anywhere;max-width:15ch;margin:0}.prompt-hanzi,.answer-hanzi{font-family:var(--font-hanzi);font-weight:600;line-height:1.16}.prompt-hanzi{font-size:clamp(2.75rem,8vw,5.5rem)}.prompt-spanish{letter-spacing:-.035em;font-size:clamp(1.75rem,4vw,3.25rem);font-weight:720;line-height:1.16}.card-answer{border-top:1px solid var(--border);background:var(--paper);padding:32px 40px;animation:.17s ease-out both reveal;position:relative}.card-answer:before{content:none}.answer-heading{justify-content:space-between;align-items:baseline;gap:16px;display:flex}.card-reference{color:var(--muted);letter-spacing:.02em;text-align:right;margin:0;font-size:.7rem;font-weight:650}.favorite-button{z-index:2;border:1px solid var(--border);background:var(--surface);width:44px;height:44px;color:var(--muted);border-radius:50%;place-items:center;padding:0;font-size:1.4rem;display:grid;position:absolute;top:16px;right:16px}.favorite-button:hover{border-color:var(--cinnabar);color:var(--cinnabar)}.favorite-button.is-favorite{border-color:var(--cinnabar);background:var(--cinnabar-soft);color:var(--cinnabar)}.speak-button{background:var(--jade);width:40px;height:40px;color:var(--surface);border:0;border-radius:50%;place-items:center;padding:0;font-size:1.1rem;line-height:1;display:grid;box-shadow:0 2px 8px #2f5a4524}.speak-button:hover{background:var(--jade-dark)}.answer-main{align-items:center;gap:16px;margin:10px 0 28px;display:flex}.answer-main .speak-button{flex:none}.answer-spanish,.answer-hanzi{min-width:0;color:var(--ink);overflow-wrap:anywhere;margin:0}.answer-spanish{letter-spacing:-.03em;font-size:clamp(1.65rem,4vw,2.65rem);font-weight:600;line-height:1.18}.answer-hanzi{font-size:clamp(2.5rem,7vw,4.5rem)}.answer-details{gap:20px;margin:0;display:grid}.answer-details>div{grid-template-columns:105px 1fr;gap:18px;display:grid}.answer-details dt,.example-block h3{color:var(--muted);letter-spacing:.06em;text-transform:uppercase;font-size:.73rem;font-weight:700}.answer-details dd{margin:0}.answer-details>div:first-child dd{color:var(--cinnabar-dark);font-size:1.08rem;font-weight:600}.example-block{background:var(--surface);border-radius:20px 20px 20px 6px;margin-top:28px;padding:20px 22px}.example-block h3{color:var(--jade);margin:0 0 12px}.example-block p{margin:4px 0}.example-block .example-hanzi{font-family:var(--font-hanzi);margin-bottom:6px;font-size:1.38rem;font-weight:650}.example-block p:last-child{color:var(--muted)}.proper-name{color:var(--proper-name);font-weight:600}.decision-area{justify-content:center;align-items:center;gap:12px;min-height:76px;padding:18px 0;display:flex}.decision-buttons{flex:1;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;display:grid}.reveal-button{min-width:min(100%,320px)}.skip-button{border:1px solid var(--border);background:var(--surface);min-height:48px;color:var(--muted);border-radius:999px;padding:9px 14px;font-weight:600}.skip-button:hover{border-color:var(--jade);color:var(--jade)}.card-skip{z-index:2;min-height:36px;padding-block:6px;font-size:.8rem;position:absolute;top:14px;left:16px}kbd{min-width:22px;font-family:var(--font-ui);background:#00000014;border:1px solid #ffffff73;border-radius:5px;padding:2px 5px;font-size:.65rem;font-weight:600;line-height:1.3;display:none}.button-secondary kbd,.skip-button kbd{border-color:var(--border-dark);background:var(--surface-warm)}.empty-state,.summary-card{border:1px solid var(--border);background:var(--surface);min-height:480px;box-shadow:var(--shadow);text-align:center;border-radius:24px;align-content:center;place-items:center;padding:56px;display:grid}.empty-state>span{border:1px solid var(--border);width:70px;height:70px;color:var(--cinnabar);font-family:var(--font-hanzi);border-radius:50%;place-items:center;margin-bottom:22px;font-size:2rem;display:grid}.empty-state h2,.summary-card h2{letter-spacing:-.035em;text-wrap:balance;max-width:19ch;margin:0;font-size:clamp(1.6rem,4vw,2.2rem);line-height:1.18}.empty-state p{max-width:44ch;color:var(--muted);margin:12px 0 24px}.empty-state .button{margin-top:22px}.empty-actions,.summary-actions{flex-wrap:wrap;justify-content:center;gap:10px;margin-top:26px;display:flex}.summary-card{position:relative;overflow:hidden}.summary-mark{color:#a63d320f;font-family:var(--font-hanzi);font-size:12rem;line-height:1;position:absolute;top:-42px;right:-18px}.summary-card .eyebrow{margin-bottom:10px}.summary-stats{flex-wrap:wrap;justify-content:center;gap:32px;margin-top:34px;display:flex}.summary-stats p{gap:3px;margin:0;display:grid}.summary-stats strong{color:var(--cinnabar);font-variant-numeric:tabular-nums;font-size:2rem}.summary-stats span{color:var(--muted);font-size:.8rem}.summary-remaining{max-width:38ch;color:var(--muted);margin:22px 0 0;font-size:.9rem}.pack-suggestion{background:var(--cinnabar-soft);text-align:left;border:1px solid #a63d3247;border-radius:18px;align-items:center;gap:24px;width:min(100%,520px);margin-top:26px;padding:24px;display:flex}.pack-suggestion__copy{min-width:0}.pack-suggestion__copy .eyebrow{margin-bottom:7px}.pack-suggestion h3,.pack-choice h4{margin:0;font-size:1.22rem}.pack-suggestion__copy>p:not(.eyebrow){color:var(--muted);margin:7px 0 0}.pack-suggestion .summary-actions{justify-content:flex-start;margin-top:18px}.queue-loading{gap:13px;display:grid}.queue-loading .loading-progress{height:33px;margin-top:0}.queue-loading p{color:var(--muted);text-align:center;margin:0}html:has(dialog[open]){overflow:hidden}.modal-dialog{max-width:calc(100% - 40px);color:var(--ink);margin:auto;animation:.14s ease-out both fade-in}.modal-dialog::backdrop{backdrop-filter:blur(3px);background:#191c188a}.pack-opening-dialog{animation:.14s ease-out both reveal}.login-dialog,.help-dialog,.voice-dialog,.packs-dialog,.confirm-dialog,.sheet{border:1px solid var(--border);background:var(--surface);overscroll-behavior:contain;border-radius:22px;width:min(440px,100%);max-height:calc(100vh - 40px);padding:32px;overflow-y:auto;box-shadow:0 30px 90px #12141240}.packs-dialog{width:min(860px,100%);max-height:min(820px,100vh - 40px)}.confirm-dialog{width:min(480px,100%)}.confirm-dialog h2{letter-spacing:-.03em;margin:7px 0 12px;font-size:1.7rem}.confirm-dialog>p:not(.eyebrow),.packs-intro{color:var(--muted)}.confirm-actions{flex-wrap:wrap;gap:10px;margin-top:24px;display:flex}.pack-shelf+.pack-shelf{margin-top:28px}.pack-shelf__heading{border-bottom:1px solid var(--border);align-items:center;gap:9px;margin-bottom:16px;padding-bottom:10px;display:flex}.pack-shelf__heading h3{letter-spacing:.04em;text-transform:uppercase;margin:0;font-size:.88rem}.pack-shelf__heading span{background:var(--surface-warm);min-width:24px;min-height:24px;color:var(--muted);border-radius:999px;place-items:center;padding:1px 6px;font-size:.72rem;font-weight:700;display:inline-grid}.pack-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:24px 18px;display:grid}.pack-choice{text-align:center;min-width:0}.pack-choice__booster{background:0 0;border:0;border-radius:18px;width:100%;padding:5px;display:block}.pack-choice__booster:hover .booster-pack,.pack-choice__booster:focus-visible .booster-pack{transform:translateY(-6px)rotate(1deg);box-shadow:8px 13px #4032201f}.pack-choice__details{margin-top:12px}.pack-choice__details h4{margin:3px 0 0;font-size:.9rem;line-height:1.25}.pack-choice__details p{color:var(--muted);margin:6px 0 8px;font-size:.76rem;line-height:1.42}.pack-choice__details small{color:var(--muted);font-size:.72rem;font-weight:600}.pack-status{color:var(--cinnabar-dark);letter-spacing:.08em;text-transform:uppercase;margin-bottom:7px;font-size:.68rem;font-weight:700;display:inline-block}.pack-choice--opened .pack-status{color:var(--jade)}.booster-pack{--pack-color:var(--cinnabar);--pack-dark:var(--cinnabar-dark);--pack-soft:var(--cinnabar-soft);aspect-ratio:.66;width:min(100%,142px);color:var(--pack-dark);filter:saturate(.96);transition:transform .16s,box-shadow .16s;display:inline-block;position:relative;transform:translateZ(0)}.booster-pack[data-theme=jade]{--pack-color:var(--jade);--pack-dark:#234f43;--pack-soft:var(--jade-soft)}.booster-pack[data-theme=amber]{--pack-color:var(--amber);--pack-dark:#68430d;--pack-soft:var(--amber-soft)}.booster-pack[data-theme=lilac]{--pack-color:var(--proper-name);--pack-dark:#5e3375;--pack-soft:var(--proper-name-soft)}.booster-pack__wrapper{z-index:2;border:2px solid var(--pack-dark);background:var(--pack-soft);border-radius:8px 8px 12px 12px;flex-direction:column;align-items:center;padding:28px 13px 25px;display:flex;position:absolute;inset:0;overflow:hidden;box-shadow:5px 8px #4032201a}.booster-pack__wrapper:before,.booster-pack__wrapper:after{border:1px solid color-mix(in srgb, var(--pack-color), transparent 52%);content:"";border-radius:50%;width:58px;height:58px;position:absolute}.booster-pack__wrapper:before{top:54px;left:-33px}.booster-pack__wrapper:after{bottom:35px;right:-38px}.booster-pack__crimp{z-index:4;background:var(--pack-color);height:17px;position:absolute;left:0;right:0}.booster-pack__crimp:after{border-top:2px dashed color-mix(in srgb, var(--surface), transparent 45%);content:"";position:absolute;left:5px;right:5px}.booster-pack__crimp--top{border-bottom:2px solid var(--pack-dark);top:0}.booster-pack__crimp--top:after{top:7px}.booster-pack__crimp--bottom{border-top:2px solid var(--pack-dark);bottom:0}.booster-pack__crimp--bottom:after{top:6px}.booster-pack__edition{z-index:2;width:100%;color:var(--pack-dark);letter-spacing:.08em;text-align:center;text-transform:uppercase;font-size:.52rem;font-weight:700;position:relative}.booster-pack__mark{z-index:2;border:2px solid var(--pack-color);background:var(--surface);width:68px;height:68px;box-shadow:4px 4px 0 color-mix(in srgb, var(--pack-color), transparent 68%);font-family:var(--font-hanzi);border-radius:50%;place-items:center;margin-top:13px;font-size:2.65rem;font-weight:700;line-height:1;display:grid;position:relative}.booster-pack__title{z-index:2;color:var(--ink);text-align:center;-webkit-line-clamp:2;-webkit-box-orient:vertical;margin-top:13px;font-size:.77rem;font-weight:700;line-height:1.18;display:-webkit-box;position:relative;overflow:hidden}.booster-pack__count{z-index:2;color:var(--pack-dark);letter-spacing:.04em;text-transform:uppercase;margin-top:auto;font-size:.56rem;font-weight:700;position:relative}.booster-pack__seal{z-index:3;border:1px solid var(--pack-color);width:22px;height:22px;color:var(--pack-color);font-family:var(--font-hanzi);place-items:center;font-size:.72rem;display:grid;position:absolute;bottom:24px;right:9px;transform:rotate(-7deg)}.booster-pack__tear-strip{z-index:6;border-top:2px solid var(--pack-dark);border-bottom:2px solid var(--pack-dark);background:var(--pack-color);transform-origin:100%;height:12px;position:absolute;top:14px;left:-2px;right:-2px}.booster-pack__cards{z-index:1;position:absolute;inset:18px 18px 8px}.booster-pack__cards span{--card-rotation:0deg;border:2px solid var(--pack-dark);background:var(--surface);border-radius:8px;height:78%;position:absolute;bottom:4px;left:9px;right:9px}.booster-pack__cards span:nth-child(2){--card-rotation:-4deg;transform:rotate(var(--card-rotation))}.booster-pack__cards span:nth-child(3){--card-rotation:4deg;transform:rotate(var(--card-rotation))}.booster-pack__opened-stamp{z-index:8;border:2px solid var(--jade);color:var(--jade);letter-spacing:.08em;text-transform:uppercase;background:#fffcf5e0;padding:5px 8px;font-size:.6rem;font-weight:950;position:absolute;top:47%;left:50%;transform:translate(-50%,-50%)rotate(-8deg)}.booster-pack--opened .booster-pack__wrapper{clip-path:polygon(0 8%,12% 4%,25% 8%,40% 3%,54% 8%,70% 4%,84% 8%,100% 3%,100% 100%,0 100%);filter:saturate(.45);opacity:.72;transform:rotate(-1.5deg)}.booster-pack--opened .booster-pack__tear-strip,.booster-pack--opened .booster-pack__crimp--top{display:none}.booster-pack--opening .booster-pack__tear-strip{animation:.38s ease-in both booster-tear-strip}.booster-pack--opening .booster-pack__wrapper{animation:1.05s ease-in-out both booster-wrapper-open}.booster-pack--opening .booster-pack__cards span{animation:1.05s ease-out both booster-cards-rise}.booster-pack--compact{flex:none;width:112px}.booster-pack--compact .booster-pack__wrapper{padding:24px 10px 22px}.booster-pack--compact .booster-pack__mark{width:54px;height:54px;margin-top:7px;font-size:2rem}.booster-pack--compact .booster-pack__title{margin-top:8px;font-size:.66rem}.pack-opening-dialog{grid-template-columns:190px minmax(0,1fr);align-items:center;gap:34px;width:min(660px,100%);display:grid}.pack-opening-stage{place-items:center;min-height:310px;display:grid}.pack-opening-stage .booster-pack{width:174px}.pack-opening-copy>p:not(.eyebrow){color:var(--muted)}.pack-opening-copy .confirm-actions{flex-direction:column;align-items:stretch}.pack-opening-copy .button{justify-content:center}.pack-opened-notice{background:var(--jade-soft);border:1px solid #2f6b524d;border-radius:14px;justify-content:space-between;align-items:center;gap:16px;margin-bottom:16px;padding:14px 16px;display:flex}.pack-opened-notice p{margin:0;font-weight:600}.packs-footer{border-top:1px solid var(--border);text-align:right;margin-top:20px;padding-top:20px}.destructive-text{color:#8f2f28}.login-dialog{text-align:left;justify-items:stretch;display:grid}.help-dialog{width:min(620px,100%);max-height:min(760px,100vh - 40px);overflow-y:auto}.help-steps{counter-reset:help-step;gap:12px;margin:0;padding:0;list-style:none;display:grid}.help-steps li{border:1px solid var(--border);background:var(--surface-warm);counter-increment:help-step;border-radius:14px;padding:16px 18px 16px 56px;position:relative}.help-steps li:before{background:var(--cinnabar-soft);width:26px;height:26px;color:var(--cinnabar-dark);content:counter(help-step);border-radius:50%;place-items:center;font-size:.75rem;font-weight:700;display:grid;position:absolute;top:15px;left:17px}.help-steps p{color:var(--muted);margin:4px 0 0;font-size:.9rem}.help-details{gap:10px;margin-top:20px;display:grid}.help-details p{color:var(--muted);margin:0;font-size:.9rem}.help-details p:nth-child(2){background:var(--proper-name-soft);color:var(--ink);border-radius:11px;padding:12px 14px}.login-dialog h2,.modal-heading h2{letter-spacing:-.03em;margin:0;font-size:1.7rem}.login-dialog>p{color:var(--muted);margin:12px 0}.google-button{width:100%;margin-top:12px}.google-button span{color:#3568c0;background:#fff;border-radius:50%;place-items:center;width:25px;height:25px;font-weight:700;display:grid}.login-dialog .config-note{background:var(--amber-soft);color:#65440f;border:1px solid #dec28f;border-radius:10px;padding:12px;font-size:.86rem}.modal-heading{justify-content:space-between;align-items:center;gap:16px;margin-bottom:24px;display:flex}.modal-heading button{background:var(--surface-warm);border:0;border-radius:50%;width:44px;height:44px;font-size:1.35rem}.voice-dialog{gap:16px;display:grid}.voice-mute{color:var(--ink);align-items:center;gap:10px;font-size:.9rem;font-weight:600;display:flex}.voice-mute input{width:18px;height:18px;accent-color:var(--cinnabar);margin:0}.voice-select-label{color:var(--muted);gap:7px;font-size:.78rem;font-weight:600;display:grid}.voice-empty{color:var(--muted);margin:0;font-size:.9rem}.voice-instructions{border:1px dashed var(--border);background:var(--surface-warm);border-radius:12px;gap:10px;padding:16px;display:grid}.voice-instructions h3{letter-spacing:.1em;text-transform:uppercase;color:var(--cinnabar);margin:0;font-size:.78rem;font-weight:700}.voice-instruction strong{margin-bottom:2px;font-size:.82rem;display:block}.voice-instruction p{color:var(--muted);margin:0;font-size:.82rem;line-height:1.45}.sheet{gap:18px;display:grid}.toast{z-index:120;border:1px solid var(--border);background:var(--ink);color:#fff;border-radius:12px;align-items:center;gap:12px;max-width:min(420px,100vw - 40px);padding:12px 12px 12px 16px;font-size:.86rem;display:flex;position:fixed;bottom:20px;right:20px;box-shadow:0 20px 60px #00000038}.toast button{color:#fff;background:#ffffff1a;border:0;border-radius:8px;width:38px;height:38px;font-size:1.2rem}.skeleton{background:var(--border);border-radius:14px;overflow:hidden}.skeleton:after{content:"";background:linear-gradient(90deg,#0000,#ffffff8c,#0000);width:100%;height:100%;animation:1.5s infinite shimmer;display:block}.loading-progress{height:54px;margin-top:30px}.loading-card{border-radius:24px;width:min(720px,100%);height:360px;margin:0 auto}.count-skeleton{vertical-align:-.1em;border-radius:4px;width:1.5ch;height:.9em;display:inline-block}.avatar-skeleton{border-radius:50%;width:44px;height:44px}.heading-title-skeleton{border-radius:.25em;width:4.5em;height:1em;margin:.25em 0;font-size:2rem}.heading-text-skeleton{border-radius:.3em;width:min(21em,80%);height:1em;margin:calc(4px + .25em) 0 .25em;font-size:.95rem}.count-value,.study-heading>h1,.study-heading>p,.account-area>.sync-label,.account-menu-wrap>.avatar-button{animation:.22s ease-out both fade-in}.view-tabs button{transition:background-color .2s ease-out,color .2s ease-out,box-shadow .2s ease-out}.session-panel>.session-progress,.session-panel>.study-card,.session-panel>.decision-area{animation:.28s cubic-bezier(.2,.7,.2,1) both reveal}.noscript-message{border:1px solid var(--cinnabar);background:var(--cinnabar-soft);max-width:600px;color:var(--ink);font-family:var(--font-ui);text-align:center;border-radius:12px;margin:32px auto;padding:16px}@keyframes reveal{0%{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}@keyframes fade-in{0%{opacity:0}to{opacity:1}}@keyframes pulse{50%{opacity:.35}}@keyframes sync-spin{to{transform:rotate(360deg)}}@keyframes shimmer{0%{transform:translate(-100%)}to{transform:translate(100%)}}@keyframes booster-tear-strip{0%{transform:translate(0)rotate(0)}55%{transform:translate(42%)rotate(4deg)}to{opacity:0;transform:translate(112%)rotate(9deg)}}@keyframes pack-trigger-open{0%{transform:scale(1)}45%{transform:scale(.97,1.04)}to{transform:scale(1.02,.98)}}@keyframes pack-trigger-tear-top{0%{opacity:1;transform:translateY(0)}to{opacity:0;transform:translateY(-5px)rotate(1deg)}}@keyframes pack-trigger-tear-bottom{0%{opacity:1;transform:translateY(0)}to{opacity:0;transform:translateY(5px)rotate(-1deg)}}@keyframes booster-wrapper-open{0%,34%{clip-path:inset(0);transform:translateY(0)}42%{clip-path:inset(9% 0 0);transform:translateY(0)}to{clip-path:inset(9% 0 0);transform:translateY(16px)rotate(-1deg)}}@keyframes booster-cards-rise{0%,38%{transform:translateY(0) rotate(var(--card-rotation))}to{transform:translateY(-48px) rotate(var(--card-rotation))}}@media (width>=960px){kbd{display:inline-block}}@media (width<=959px){.filter-trigger{display:inline-flex}.pack-trigger{min-width:86px}.decision-buttons{min-width:0}.empty-state,.summary-card{min-height:430px}.sheet{width:100%;max-width:none;padding:26px 20px max(24px, env(safe-area-inset-bottom));border-radius:22px 22px 0 0;max-height:calc(100dvh - 40px);margin:0;animation:.18s ease-out both sheet-up;position:fixed;inset:auto 0 0;overflow-y:auto}@keyframes sheet-up{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}}@media (width<=600px){.button-small{min-height:42px;padding:7px 10px;font-size:.76rem}.filter-trigger{min-width:82px;padding:10px 12px}.session-progress>div:first-child{align-items:flex-start}.direction-badge{white-space:nowrap}.answer-heading{align-items:flex-start}.card-reference{max-width:55%}.answer-details>div{grid-template-columns:1fr;gap:4px}.example-block{padding:18px}.decision-buttons{gap:7px}.decision-buttons .button{min-width:0;padding:10px 8px;font-size:.78rem}.skip-button{padding:7px 5px;font-size:.78rem}.empty-state,.summary-card{min-height:390px;padding:40px 22px}.summary-stats{gap:18px}.summary-stats p{min-width:110px}.login-dialog{padding:28px 22px}.help-dialog,.packs-dialog,.confirm-dialog,.voice-dialog{max-height:calc(100dvh - 40px);padding:26px 20px}.pack-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:26px 16px}.pack-choice__details p{font-size:.72rem}.pack-choice .booster-pack__wrapper{padding:24px 9px 22px}.pack-choice .booster-pack__mark{width:54px;height:54px;margin-top:8px;font-size:2rem}.pack-choice .booster-pack__title{margin-top:8px;font-size:.67rem}.pack-opening-dialog{text-align:center;grid-template-columns:1fr;gap:8px}.pack-opening-stage{min-height:250px}.pack-opening-stage .booster-pack{width:142px}.pack-opening-copy .confirm-actions{margin-top:20px}.pack-suggestion{align-items:flex-start;padding:20px}.help-steps li{padding:14px 14px 14px 50px}}@media (width<=370px){.search-field input{padding-left:40px;font-size:.86rem}.filter-trigger{min-width:72px;font-size:.78rem}.pack-trigger{min-width:66px;padding:10px;font-size:.78rem}.pack-grid{column-gap:10px}.pack-choice__details p{-webkit-line-clamp:3;-webkit-box-orient:vertical;display:-webkit-box;overflow:hidden}.pack-suggestion{display:block}.pack-suggestion .booster-pack{display:none}}@media (prefers-reduced-motion:reduce){.sync-syncing:before{animation:none}*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}.app-icon{flex:none;width:21px;height:21px}.view-tabs .app-icon{display:none}.button-ink:hover{background:var(--ink-hover)}.save-progress{background:var(--jade-soft);color:var(--jade);position:relative}.save-progress:after{content:"";border:2px solid var(--surface);background:#d4a33c;border-radius:50%;width:8px;height:8px;position:absolute;top:-2px;right:-2px}.save-progress .app-icon{width:17px;height:17px}.study-workspace{max-width:720px;margin:36px auto 0}.study-workspace[hidden]{display:none}.study-heading{display:grid}.study-heading h1{letter-spacing:-.04em;margin:0;font-size:2rem;font-weight:700}.study-heading p{color:var(--muted);margin:4px 0 0;font-size:.95rem}@media (width<=1399px){.sync-label.sync-local{display:none}.sync-label:before{margin-right:0}.sync-status-text{clip-path:inset(50%);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}}@media (width>=960px) and (width<=1199px){.site-header{grid-template-columns:1fr auto;gap:16px}.view-tabs{grid-area:2/1/auto/-1;justify-self:center}}@media (width<=959px){.app-shell{padding:0 20px calc(172px + env(safe-area-inset-bottom))}.site-header{justify-content:space-between;gap:12px;min-height:76px;margin:0 -20px;padding:14px 20px;display:flex}.brand{gap:8px}.brand strong{font-size:1rem}.header-tools{position:relative}.account-area,.account-menu-wrap{position:static}.save-progress{border-radius:50%;width:44px;padding:0}.save-progress .app-icon{width:20px;height:20px}.save-progress>span{display:none}.view-tabs{z-index:45;padding:6px 8px calc(6px + env(safe-area-inset-bottom));border-top:1px solid var(--border);background:var(--surface);border-radius:0;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;display:grid;position:fixed;inset:auto 0 0}.view-tabs button{grid-template-columns:auto auto;align-content:center;gap:3px 5px;min-height:56px;padding:4px 2px;font-size:.72rem;display:grid}.view-tabs .app-icon{grid-area:1/1/2/-1;justify-self:center;width:23px;height:23px;display:block}.view-tabs button:has(.count-pill) .app-icon{grid-column:1}.view-tabs button>span:not(.count-pill){grid-area:2/1/3/-1}.view-tabs button.is-active{box-shadow:none;color:var(--jade);background:0 0}.view-tabs button.is-active:after{content:"";background:var(--jade);border-radius:3px;width:24px;height:3px;position:absolute;inset:0 auto auto calc(50% - 12px)}.view-tabs .count-pill{border:1px solid var(--border);background:var(--surface-warm);min-width:20px;color:var(--ink);border-radius:999px;grid-area:1/2;padding:0 5px;font-size:.6875rem;line-height:18px}.view-tabs .is-active .count-pill{border-color:var(--jade);background:var(--jade);color:var(--surface)}.study-workspace{max-width:720px;margin-top:24px}.study-heading h1,.heading-title-skeleton{font-size:1.5rem}.study-heading p,.heading-text-skeleton{font-size:.875rem}.study-layout{display:block}.decision-area{z-index:40;inset:auto 0 calc(69px + env(safe-area-inset-bottom));background:var(--paper);border-top:1px solid var(--border);min-height:78px;padding:12px max(20px,50vw - 360px);position:fixed}.card-prompt{min-height:340px}.toast{bottom:calc(164px + env(safe-area-inset-bottom))}.login-dialog{width:100%;max-width:none;padding-bottom:max(28px, env(safe-area-inset-bottom));border-radius:24px 24px 0 0;margin:0;position:fixed;top:auto;bottom:0}}@media (width<=600px){.app-shell{padding-inline:16px}.site-header{margin-inline:-16px;padding-inline:16px}.brand-mark{width:34px;height:34px}.header-tools{gap:6px}.study-controls{margin:20px 0}.study-toolbar .button{gap:6px;min-height:46px;padding-inline:10px;font-size:.875rem}.study-card{border-radius:16px;min-height:280px}.card-prompt{min-height:280px;padding:52px 24px 40px}.card-answer{padding:28px 24px}.decision-area{padding-inline:16px}.reveal-button{flex:1;min-width:0}.session-progress>div:first-child{font-size:.75rem}}@media (width<=370px){.brand{gap:4px}.brand strong{font-size:.875rem}.brand-mark{width:28px;height:28px}.header-tools{gap:4px}.locale-switcher button{min-width:28px;padding-inline:4px}.study-toolbar .button{gap:5px;padding-inline:8px;font-size:.78rem}.study-toolbar .app-icon{width:16px;height:16px}}.study-card.is-revealed .card-prompt{min-height:160px;padding:28px 56px}.study-card.is-revealed .card-prompt .eyebrow{margin-bottom:12px}.study-card.is-revealed .prompt-hanzi{font-size:2.75rem}.study-card.is-revealed .prompt-spanish{font-size:1.5rem}.favorite-button.is-favorite .app-icon{fill:currentColor}.speak-button{width:44px;height:44px}