:root{color-scheme:dark;--bg:#0b1729;--card:#13243c;--line:#304662;--text:#f5f2e9;--muted:#a9b6c8;--accent:#eabb76;--green:#a8d6ba;--red:#e8a0a0;--red-bg:rgba(232,160,160,.12);--green-bg:rgba(168,214,186,.12)}
@media(prefers-color-scheme:light){:root{color-scheme:light;--bg:#f5f0e6;--card:#fffbf4;--line:#d9d6cb;--text:#18283b;--muted:#617084;--accent:#a2611e;--green:#44745c;--red:#a94442;--red-bg:rgba(169,68,66,.1);--green-bg:rgba(68,116,92,.1)}}
.study-page .grammar-list{align-items:start}
.study-page #study-list:has(.study-group){display:flex;flex-direction:column;gap:28px}
.study-group{display:flex;flex-direction:column;gap:14px;min-width:0}
.study-group-heading{font-family:Georgia,"Times New Roman",serif;font-size:22px;font-weight:400;line-height:1.25;margin:0;color:var(--text)}
.study-group-count{font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:13px;font-weight:650;color:var(--muted);letter-spacing:0}
.study-group-list{display:grid;gap:16px;align-items:start}
.study-group-filters{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0 0}
.study-group-filters[hidden]{display:none}
.study-group-filters button{font:inherit;font-size:13px;line-height:1.4;min-height:36px;padding:6px 12px;border:1px solid var(--line);border-radius:999px;color:var(--muted);background:var(--card);cursor:pointer}
.study-group-filters button[aria-pressed=true]{color:var(--bg);background:var(--accent);border-color:var(--accent);font-weight:700}
.study-topic{display:flex;flex-direction:column;gap:12px;text-decoration:none;color:var(--text);min-height:230px;transition:border-color .15s,transform .15s}
.study-topic:hover{border-color:var(--accent);transform:translateY(-2px)}
.study-topic-meta{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px}
.study-topic-progress{font-size:11px;line-height:1.4;font-weight:700;letter-spacing:.02em;padding:4px 8px;border-radius:999px;border:1px solid var(--line);color:var(--muted);background:var(--bg);max-width:100%;overflow-wrap:anywhere}
.study-topic-progress-idle{opacity:.85}
.study-topic-progress-partial{color:var(--accent);border-color:var(--accent)}
.study-topic-progress-done{color:var(--green);border-color:var(--green);background:var(--green-bg)}
.study-topic-bar{height:5px;border-radius:999px;background:var(--line);overflow:hidden;margin-top:2px}
.study-topic-bar-fill{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--green),var(--accent));border-radius:inherit}
.study-topic h2{font-size:24px;line-height:1.3;margin:0;color:var(--accent)}.study-topic p{font-size:14px;line-height:1.7;margin:0}.study-topic small{color:var(--muted);line-height:1.5}.study-topic .study-open{color:var(--green);margin-top:auto;font-weight:650}
@media(min-width:768px){
  .study-group-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
  .study-page .library-toolbar .study-group-filters{grid-column:1 / -1;margin-top:8px}
}
@media(min-width:1100px){
  .study-group-list{grid-template-columns:repeat(3,minmax(0,1fr))}
  .study-group-heading{font-size:26px}
}.study-notice{font-size:14px;line-height:1.7;border-left:3px solid var(--accent);padding:12px 16px;background:var(--card);border-radius:0 12px 12px 0;margin:0 0 24px}.study-badge{display:inline-block;color:var(--accent);font-size:11px;line-height:1.5;margin:8px 0}.study-kanji{font-size:64px;line-height:1.4;margin:10px 0;color:var(--accent)}.study-word{font-size:28px;line-height:1.8;color:var(--accent);margin:8px 0}.study-card p{line-height:1.8;white-space:pre-wrap}.study-card dl{margin:0;font-size:14px}.study-card dt{color:var(--muted);font-size:12px;margin-top:14px}.study-card dd{margin:4px 0 0;line-height:1.8;overflow-wrap:anywhere}.study-card .study-stem{font-size:19px;line-height:1.9;margin:14px 0}.study-stem mark{font-weight:700;background:transparent;color:var(--accent);text-decoration:underline;text-underline-offset:5px}.study-options{display:grid;gap:10px;margin-top:18px}.study-option{font:inherit;text-align:left;line-height:1.6;padding:12px;border:1px solid var(--line);border-radius:10px;color:var(--text);background:var(--bg);cursor:pointer}.study-option[aria-pressed=true]:not([data-result]){border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent)}.study-option[data-result=correct]{border-color:var(--green);background:var(--green-bg);box-shadow:inset 0 0 0 1px var(--green);color:var(--text)}.study-option[data-result=incorrect]{border-color:var(--red);background:var(--red-bg);box-shadow:inset 0 0 0 1px var(--red);color:var(--text)}.study-feedback{font-size:14px;color:var(--muted);min-height:24px;margin-bottom:0}.study-card small{color:var(--muted)}.study-page :is(a,button):focus-visible{outline:2px solid var(--accent);outline-offset:4px}.study-page .library-toolbar h1{font-family:inherit;font-weight:650;font-size:21px}
@media(min-width:1100px){.study-page .library-toolbar h1{font-size:25px}}

.study-word ruby,.study-example-jp ruby{ruby-position:over;ruby-align:center}.study-word rt,.study-example-jp rt{font-size:.55em;font-weight:400;line-height:1.2;color:var(--muted)}.study-card .study-example-jp{font-size:18px;line-height:2.7;padding:10px 14px}.study-example-vi{color:var(--muted);font-size:14px}.study-collocation{color:var(--green);font-size:20px}

.study-connector{font-size:25px;font-weight:700;line-height:1.8;color:var(--accent);margin:10px 0}.study-section{display:block;line-height:1.7;margin-bottom:12px}.study-verb-info{color:var(--green);font-size:14px}.study-tip-body{white-space:pre-wrap}

.study-stem ruby,.study-connector ruby{ruby-position:over;ruby-align:center}.study-stem rt,.study-connector rt{font-size:.55em;font-weight:400;line-height:1.2;color:var(--muted)}.study-card .study-stem{line-height:2.5}.study-connector{line-height:2.3}

.study-feedback[data-state=ok]{color:var(--green)}.study-feedback[data-state=wrong]{color:var(--red)}.study-feedback[data-state=neutral]{color:var(--muted)}.study-result{font-size:12px;font-weight:700;margin-left:10px}.study-result-ok{color:var(--green)}.study-result-bad{color:var(--red)}

.study-explain{margin-top:12px;font-size:14px;line-height:1.7;border-top:1px solid var(--line);padding-top:14px}.study-explain h4{font-size:15px;margin:0 0 10px}.study-card .study-explain-summary{color:var(--text);margin:0 0 12px}.study-explain-list{list-style:none;padding:0;margin:0;display:grid;gap:10px}.study-explain-item{border:1px solid var(--line);border-radius:10px;padding:10px 12px}.study-explain-item strong{font-weight:650;overflow-wrap:anywhere}.study-explain-correct{border-color:var(--green);background:var(--green-bg)}.study-explain-wrong{border-color:var(--line)}.study-explain-selected{box-shadow:inset 0 0 0 1px currentColor}.study-explain-wrong.study-explain-selected{border-color:var(--red);color:var(--red)}.study-explain-correct.study-explain-selected{color:var(--green)}.study-explain-choice{display:block;font-size:11px;margin-top:4px}.study-card .study-explain-item p{margin:6px 0 0;color:var(--muted);white-space:pre-wrap}

.study-progress{margin:0 0 20px;display:grid;gap:12px;padding:16px;border:1px solid var(--line);border-radius:12px;background:var(--card)}.study-progress[hidden]{display:none}.study-progress-text{margin:0;font-size:14px;color:var(--muted)}.study-progress-bar{display:flex;height:8px;border-radius:999px;overflow:hidden;background:var(--line)}.study-progress-fill{width:0}.study-progress-ok{background:var(--green)}.study-progress-bad{background:var(--red)}.study-progress-filters,.study-progress-actions{display:flex;flex-wrap:wrap;gap:8px}.study-progress button{font:inherit;font-size:14px;line-height:1.5;padding:8px 12px;border:1px solid var(--line);border-radius:8px;color:var(--text);background:var(--bg);cursor:pointer}.study-progress-filters button[aria-pressed=true]{border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent)}.study-progress button:disabled{opacity:.5;cursor:default}

.study-explain-toggle{margin-top:12px;padding:8px 12px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--text);font:inherit;font-size:14px;line-height:1.5;cursor:pointer}.study-explain-toggle:hover{border-color:var(--accent)}.study-explain-toggle[hidden]{display:none}

/* Minimal sticky chrome: one practice/known strip; session controls dock at bottom. */
.study-page .library-toolbar .study-progress{grid-column:1 / -1;margin:6px 0 0;padding:0;gap:0;border:0;border-radius:0;background:transparent;box-shadow:none}
.study-page .library-toolbar:has(.study-progress:not([hidden])) .grammar-status{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
.study-progress-text{font-variant-numeric:tabular-nums}.study-progress-bar{height:3px}.study-progress-filters button{min-height:32px;padding:4px 8px;font-size:12px;border-radius:999px}.study-progress-menu{position:relative;flex-shrink:0}.study-progress-menu summary{display:grid;place-items:center;min-width:32px;min-height:32px;border:1px solid var(--line);border-radius:8px;font-size:20px;line-height:1;cursor:pointer;list-style:none}.study-progress-menu summary::-webkit-details-marker{display:none}.study-progress-menu summary:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.study-progress-menu .study-progress-actions{position:absolute;right:0;top:calc(100% + 6px);z-index:2;display:grid;min-width:200px;padding:8px;border:1px solid var(--line);border-radius:10px;background:var(--card);box-shadow:0 6px 24px #0003}.study-progress-actions button{text-align:left;min-height:44px}
.study-practice-strip,.study-known-strip{display:flex;flex-wrap:wrap;align-items:center;gap:6px 8px}
.study-practice-meta,.study-known-meta{flex:1 1 120px;display:grid;gap:3px;min-width:0}
.study-practice-progress .study-progress-text,.study-known-progress .study-progress-text{font-size:12px;line-height:1.3;margin:0}
.study-practice-progress .study-view-mode{margin:0;gap:4px}
.study-practice-progress .study-view-mode button{min-height:30px;padding:4px 10px;font-size:12px}
.study-filter-drawer{margin:0;border:0;padding:0;background:transparent;position:relative;flex-shrink:0}
.study-filter-drawer[hidden]{display:none}
.study-filter-drawer>summary{cursor:pointer;list-style:none;font-size:12px;font-weight:650;color:var(--text);min-height:32px;padding:4px 10px;border:1px solid var(--line);border-radius:999px;background:var(--card);display:inline-flex;align-items:center;gap:4px}
.study-filter-drawer>summary::-webkit-details-marker{display:none}
.study-filter-drawer>summary::after{content:'▾';color:var(--muted);font-size:10px}
.study-filter-drawer[open]>summary{border-color:var(--accent);color:var(--accent)}
.study-filter-drawer[open]>summary::after{content:'▴'}
.study-filter-drawer .study-progress-filters{position:absolute;right:0;top:calc(100% + 6px);z-index:3;display:grid;grid-template-columns:1fr 1fr;gap:6px;min-width:220px;padding:8px;border:1px solid var(--line);border-radius:12px;background:var(--card);box-shadow:0 8px 28px #0003}
.study-known-progress .study-progress-filters{flex:1 1 auto;display:flex;flex-wrap:nowrap;gap:6px;min-width:0}
.study-known-progress .study-progress-filters button{flex:1 1 0;min-height:30px;padding:4px 8px;font-size:12px;border-radius:999px;white-space:nowrap}
.study-page .grammar-card{scroll-margin-top:calc(120px + env(safe-area-inset-top))}
.study-modal{width:calc(100% - 32px);max-width:720px;max-height:calc(100dvh - 32px);padding:0;border:1px solid var(--line);border-radius:18px;background:var(--card);color:var(--text);box-shadow:0 20px 80px #0006;overflow:hidden;font-family:inherit}.study-modal::backdrop{background:#0009}.study-modal-panel{display:flex;flex-direction:column;max-height:calc(100dvh - 34px)}.study-modal-header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:12px 18px;border-bottom:1px solid var(--line);flex-shrink:0}.study-modal-header h2{font-size:18px;line-height:1.4;margin:0}.study-modal-close{min-height:44px;flex-shrink:0;padding:8px 12px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--text);font:inherit;font-size:14px;cursor:pointer}.study-modal-close:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.study-modal .study-modal-content{overflow-y:auto;overscroll-behavior:contain;margin:0;padding:18px;border:0}.study-modal-content .study-explain-item p{margin:6px 0 0;color:var(--muted);white-space:pre-wrap}.study-modal-content .study-explain-choice{color:var(--muted)}html:has(.study-modal[open]){overflow:hidden}
@media(min-width:768px){
  .study-page .library-toolbar{padding-top:12px;padding-bottom:8px;row-gap:4px}
  .study-page .library-toolbar-row{margin-bottom:0}
  .study-practice-strip,.study-known-strip{flex-wrap:nowrap;gap:10px}
  .study-practice-meta{flex:1 1 auto;max-width:280px}
  .study-known-meta{flex:0 1 200px}
  .study-known-progress .study-progress-filters{flex:0 0 auto;width:auto}
  .study-known-progress .study-progress-filters button{flex:0 0 auto;min-width:7em;padding:4px 10px}
  .study-page .grammar-card{scroll-margin-top:112px}
}
@media(max-width:767px){
 .study-page .library-toolbar{padding:calc(4px + env(safe-area-inset-top)) 14px 6px;margin-left:-22px;margin-right:-22px;margin-bottom:10px}
 .study-page .library-toolbar-row{min-height:32px;margin-bottom:4px;gap:8px}.study-page .library-toolbar .back{min-width:32px;min-height:32px;font-size:20px}.study-page .library-toolbar h1{font-size:16px;line-height:1.25}.study-page .library-toolbar .grammar-search{padding:7px 10px;font-size:16px;border-radius:9px}
 .study-page .library-toolbar .study-progress{margin-top:4px}
 .study-known-progress .study-progress-filters{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));width:100%;flex:1 1 100%}
 .study-known-progress .study-progress-filters button{min-height:30px;font-size:11px;padding:4px 2px}
 .study-page .grammar-card{scroll-margin-top:calc(108px + env(safe-area-inset-top))}
 .study-modal{width:calc(100% - 16px);max-height:calc(100dvh - 16px - env(safe-area-inset-top) - env(safe-area-inset-bottom));border-radius:14px}.study-modal-panel{max-height:calc(100dvh - 18px - env(safe-area-inset-top) - env(safe-area-inset-bottom))}.study-modal-header{padding:8px 12px;gap:8px}.study-modal-header h2{font-size:16px}.study-modal .study-modal-content{padding:14px}
}

.study-example-jp .study-target{background:transparent;color:var(--red);font-weight:750;text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:4px}.study-example-jp ruby:has(.study-target) rt{color:var(--red)}.study-known{display:block;margin-top:18px;min-height:40px;padding:8px 12px;border:1px solid var(--line);border-radius:999px;background:var(--bg);color:var(--muted);font:inherit;font-size:13px;cursor:pointer}.study-known::before{content:'○';margin-right:6px}.study-known[aria-pressed=true]{color:var(--green);border-color:var(--green);background:var(--green-bg)}.study-known[aria-pressed=true]::before{content:'✓'}.grammar-card[data-known=true]{border-color:var(--green)}

.study-view-mode{display:flex;flex-wrap:nowrap;gap:4px;margin:0}
.study-view-mode[hidden]{display:none}
.study-view-mode button{font:inherit;font-size:12px;line-height:1.3;min-height:30px;padding:4px 10px;border:1px solid var(--line);border-radius:999px;color:var(--muted);background:var(--card);cursor:pointer}
.study-view-mode button[aria-pressed=true]{color:var(--bg);background:var(--accent);border-color:var(--accent);font-weight:700}
.study-session-dock{z-index:35;display:flex;align-items:center;justify-content:center;gap:10px;margin:0;padding:8px 14px calc(8px + env(safe-area-inset-bottom));border:0;border-top:1px solid var(--line);border-radius:0;background:var(--card);box-shadow:0 -4px 18px #0001}
.study-session-dock[hidden]{display:none}
.study-session-text{margin:0;flex:0 0 auto;min-width:4.8em;font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums;text-align:center;white-space:nowrap}
.study-session-actions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px;max-width:420px;width:100%;margin:0}
.study-session-actions button{font:inherit;font-size:13px;min-height:40px;padding:6px 8px;border:1px solid var(--line);border-radius:10px;color:var(--text);background:var(--bg);cursor:pointer}
.study-session-actions button:disabled{opacity:.45;cursor:default}
.study-session-next{font-weight:700}
.study-session-next.is-ready{background:var(--accent);border-color:var(--accent);color:var(--bg)}
/* Session = app shell: header + scrollable card + dock (no overlap). */
body.study-session-active{
  height:100dvh;
  max-height:100dvh;
  overflow:hidden;
  display:flex;
  flex-direction:column;
  padding-bottom:0 !important;
}
body.study-session-active > main{
  flex:1 1 auto;
  min-height:0;
  width:100%;
  max-width:1000px;
  margin:0 auto;
  padding:0 22px;
  display:flex;
  flex-direction:column;
  overflow:hidden;
}
body.study-session-active .library-toolbar{
  position:static;
  flex-shrink:0;
  margin:0 0 8px;
  padding:calc(6px + env(safe-area-inset-top)) 0 6px;
  border-bottom:1px solid var(--line);
  box-shadow:none;
}
body.study-session-active .library-toolbar-row{min-height:30px;margin-bottom:4px}
body.study-session-active .library-toolbar h1{font-size:16px;line-height:1.25}
body.study-session-active .library-toolbar .back{min-width:32px;min-height:32px}
body.study-session-active .study-practice-strip{gap:6px}
body.study-session-active .study-practice-meta{max-width:200px}
body.study-session-active #study-list.grammar-list{
  flex:1 1 auto;
  min-height:0;
  overflow:auto;
  overscroll-behavior:contain;
  display:grid;
  grid-template-columns:minmax(0,720px);
  justify-content:center;
  justify-items:stretch;
  width:100%;
  align-content:start;
  padding-bottom:4px;
  -webkit-overflow-scrolling:touch;
}
body.study-session-active > .study-session-dock{
  position:static;
  flex-shrink:0;
  width:100%;
}
.study-session-card{width:100%;max-width:720px;margin:0 auto}
body.study-session-active .study-session-card{padding:16px 18px}
body.study-session-active .study-session-card .study-stem{margin:10px 0;font-size:18px;line-height:1.75}
body.study-session-active .study-options{gap:8px;margin-top:12px}
body.study-session-active .study-option{padding:10px 12px}
@media(min-width:768px){
  body.study-session-active > main{max-width:1280px;padding:0 32px}
  body.study-session-active .library-toolbar{padding-top:8px;padding-bottom:6px}
}
.study-session-done,.study-complete,.study-empty{display:grid;gap:14px;padding:28px 22px;border:1px solid var(--line);border-radius:18px;background:var(--card);text-align:center}
.study-session-done h2,.study-complete h2,.study-empty h2{margin:0;font-family:Georgia,"Times New Roman",serif;font-weight:400;font-size:28px}
.study-session-done p,.study-complete p,.study-empty p{margin:0;color:var(--muted);line-height:1.6}
.study-session-done-action,.study-complete-action{font:inherit;font-weight:700;min-height:48px;padding:12px 16px;border:0;border-radius:12px;background:var(--accent);color:var(--bg);cursor:pointer}
.study-session-done-secondary,.study-complete-secondary{background:var(--bg);color:var(--text);border:1px solid var(--line)}
.study-complete,.study-empty{margin-bottom:8px}

.study-flash-fab{position:fixed;right:max(16px,env(safe-area-inset-right));bottom:max(16px,env(safe-area-inset-bottom));z-index:40;display:grid;justify-items:end;gap:10px;pointer-events:none}
.study-flash-fab[hidden]{display:none}
.study-flash-fab > *{pointer-events:auto}
.study-flash-fab-menu{display:grid;gap:8px;min-width:min(220px,calc(100vw - 40px));padding:8px;border:1px solid var(--line);border-radius:16px;background:var(--card);box-shadow:0 12px 40px #0004}
.study-flash-fab-menu[hidden]{display:none}
.study-flash-fab-menu button{font:inherit;font-size:14px;font-weight:600;min-height:44px;padding:10px 14px;border:1px solid var(--line);border-radius:12px;background:var(--bg);color:var(--text);text-align:left;cursor:pointer}
.study-flash-fab-menu button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.study-flash-fab-toggle{font:inherit;font-size:15px;font-weight:700;min-height:52px;padding:12px 18px;border:0;border-radius:999px;color:var(--bg);background:var(--accent);box-shadow:0 10px 28px color-mix(in srgb,var(--accent) 45%,transparent);cursor:pointer}
.study-flash-fab-toggle:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.study-flash-fab-toggle[aria-expanded=true]{box-shadow:0 6px 18px #0003}
.study-page:has(.study-flash-fab:not([hidden])){padding-bottom:calc(88px + env(safe-area-inset-bottom))}
.study-flash{display:grid;gap:16px;max-width:720px;margin:0 auto;padding-bottom:calc(24px + env(safe-area-inset-bottom))}
.study-flash[hidden]{display:none}
.study-flash-bar{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px}
.study-flash-counter{margin:0;flex:1 1 auto;font-size:14px;color:var(--muted);font-variant-numeric:tabular-nums}
.study-flash-shuffle{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--muted);cursor:pointer;user-select:none}
.study-flash-shuffle input{width:16px;height:16px;accent-color:var(--accent)}
.study-flash-exit{font:inherit;font-size:14px;min-height:40px;padding:8px 12px;border:1px solid var(--line);border-radius:10px;background:var(--card);color:var(--text);cursor:pointer}
.study-flash-card{display:grid;gap:22px;min-height:min(58dvh,520px);padding:28px 22px;border:1px solid var(--line);border-radius:18px;background:var(--card);align-content:center;text-align:center;cursor:pointer}
.study-flash-card:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.study-flash-head{font-size:clamp(28px,7vw,44px);line-height:1.45;font-weight:700}
.study-flash-head ruby rt{font-size:.38em;font-weight:500}
.study-flash-answer{display:grid;gap:12px;text-align:left}
.study-flash-answer[hidden]{display:none}
.study-flash-meaning{margin:0;font-size:17px;line-height:1.55}
.study-flash-example{min-height:1.5em}
.study-flash-example .grammar-example,.study-flash-example .study-example-jp{margin:0;font-size:16px;line-height:1.7}
.study-flash-actions{display:grid;gap:10px}
.study-flash-actions[hidden]{display:none}
.study-flash-actions button{font:inherit;font-size:15px;min-height:48px;padding:10px 14px;border:1px solid var(--line);border-radius:12px;background:var(--bg);color:var(--text);cursor:pointer}
.study-flash-actions #study-flash-reveal,.study-flash-next{font-weight:700;background:var(--accent);border-color:var(--accent);color:var(--bg)}
.study-flash-back-actions{grid-template-columns:1fr 1fr;cursor:default}
.study-flash-back-actions .study-flash-next{grid-column:1 / -1}
.study-flash-done{display:grid;gap:14px;padding:28px 22px;border:1px solid var(--line);border-radius:18px;background:var(--card);text-align:center}
.study-flash-done[hidden]{display:none}
.study-flash-done h2{margin:0;font-family:Georgia,"Times New Roman",serif;font-weight:400;font-size:28px}
.study-flash-done p{margin:0;color:var(--muted);line-height:1.6}
.study-flash-done-actions{display:grid;gap:10px}
.study-flash-done-actions button{font:inherit;font-weight:700;min-height:48px;padding:12px 16px;border:0;border-radius:12px;background:var(--accent);color:var(--bg);cursor:pointer}
.study-flash-done-actions .study-flash-secondary{font-weight:600;background:var(--bg);color:var(--text);border:1px solid var(--line)}
.study-flash-done-actions button:disabled{opacity:.45;cursor:default}
body.study-flash-active #study-list,
body.study-flash-active #study-notice,
body.study-flash-active .grammar-search-label,
body.study-flash-active #study-search{display:none !important}
body.study-flash-active #study-flash-fab{display:none !important}
@media(min-width:560px){
  .study-flash-back-actions{grid-template-columns:1fr 1fr 1.2fr}
  .study-flash-back-actions .study-flash-next{grid-column:auto}
}
@media(max-width:767px){
  .study-flash-fab{right:max(14px,env(safe-area-inset-right));bottom:max(14px,env(safe-area-inset-bottom))}
  .study-flash-fab-toggle{min-height:48px;padding:11px 16px;font-size:14px}
  .study-flash-card{min-height:min(52dvh,480px);padding:22px 16px;border-radius:14px}
  .study-flash-actions button{min-height:44px}
}