:root {
  color-scheme: light dark;
  font-family: -apple-system, BlinkMacSystemFont, 'Helvetica Neue', 'Segoe UI', 'Noto Sans', sans-serif;
  font-size: 16px;
  font-synthesis: none;
  --background:#f5f5f7; --surface:#fff; --inset:#f5f5f7; --text:#1d1d1f;
  --secondary:#636366; --separator:#d8d8dc; --tint:#0066cc; --tint-soft:#eaf2fc;
  --danger:#b42318; --header:rgba(250,250,252,.92);
  background:var(--background); color:var(--text); -webkit-text-size-adjust:100%;
}
*{box-sizing:border-box}body{margin:0}button,input,textarea{font:inherit}
button,a{-webkit-tap-highlight-color:transparent;touch-action:manipulation}button{cursor:pointer}
a{color:var(--tint);text-decoration:none}a:hover{text-decoration:underline}svg{width:20px;height:20px;flex:none}
button:disabled{opacity:.4;cursor:default}:focus-visible{outline:3px solid var(--tint);outline-offset:3px}
.skip-link{position:fixed;left:16px;top:-80px;padding:12px 20px;background:var(--surface);z-index:20}.skip-link:focus{top:8px}
.app-header{position:sticky;top:0;z-index:5;background:var(--header);border-bottom:1px solid var(--separator);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px)}
.app-header nav{max-width:1120px;min-height:60px;margin:auto;padding:0 32px;display:flex;align-items:center;justify-content:space-between}
.brand{font-size:17px;letter-spacing:-.025em;font-weight:600;color:var(--text);min-height:44px;display:inline-flex;align-items:center}
.lang{font-size:14px;display:inline-flex;align-items:center;min-height:44px;padding:0 4px 0 12px}
main{max-width:1120px;margin:auto;padding:0 32px}.page-heading{padding:48px 0 40px}
h1{font-size:clamp(28px,3.6vw,38px);line-height:1.25;letter-spacing:-.04em;margin:0;font-weight:650}
.intro{font-size:17px;line-height:1.65;color:var(--secondary);margin:12px 0 0}
.layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:40px;align-items:start}
.section-head{min-height:32px;display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}
h2{margin:0;font-size:20px;font-weight:600;letter-spacing:-.025em}.count,.file-meta{color:var(--secondary);font-size:13px}
.section-note{color:var(--secondary);font-size:14px;line-height:1.6;margin:0 0 16px}
.entry{background:var(--surface);border-radius:16px;overflow:hidden;margin:0 0 12px;border:1px solid transparent}.entry[open]{border-color:var(--separator)}
.entry summary{display:flex;gap:14px;align-items:center;min-height:84px;padding:16px 20px;list-style:none;cursor:pointer}
.entry summary::-webkit-details-marker{display:none}.entry summary:focus-visible{outline-offset:-4px;border-radius:15px}
.entry-index{font-size:14px;font-weight:500;color:var(--secondary);min-width:28px;height:28px;display:grid;place-items:center;border-radius:50%;background:var(--inset);font-variant-numeric:tabular-nums}
.entry-summary{min-width:0;flex:1}.entry-name{display:block;overflow-wrap:anywhere;font-size:17px;font-weight:600;line-height:1.45}
.entry-ages{display:block;font-size:13px;color:var(--secondary);margin-top:3px;line-height:1.5}
.entry-chevron{width:16px;height:16px;color:var(--secondary);transition:transform .15s}.entry[open] .entry-chevron{transform:rotate(180deg)}
.entry-body{border-top:1px solid var(--separator);padding:20px}.field{display:block;font-size:14px;font-weight:500;line-height:1.5}
input[type=text],textarea{display:block;width:100%;margin-top:8px;border:1px solid var(--separator);border-radius:10px;background:var(--surface);color:var(--text);padding:12px;font-size:17px;line-height:1.5}
textarea{min-height:90px;resize:vertical}.ages{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:16px;margin-top:22px}
.age-label{display:block;color:var(--secondary);font-size:14px;margin-bottom:8px}
.slot-wrap{position:relative;display:flex;align-items:center;border-radius:12px;background:var(--inset);padding:0 4px}
.slot-wrap::before{content:'';position:absolute;left:8px;right:52px;top:44px;height:44px;border-radius:8px;background:var(--surface);pointer-events:none}
.age-slot{position:relative;height:132px;min-width:0;flex:1;padding:44px 0;overflow-y:auto;overscroll-behavior:contain;scroll-snap-type:y mandatory;scrollbar-width:none;mask-image:linear-gradient(transparent,#000 28%,#000 72%,transparent);-webkit-mask-image:linear-gradient(transparent,#000 28%,#000 72%,transparent)}
.age-slot::-webkit-scrollbar{display:none}.age-slot:focus-visible{outline-offset:-3px;border-radius:8px}
.age-number{height:44px;line-height:44px;font-size:22px;color:var(--secondary);text-align:center;font-variant-numeric:tabular-nums;scroll-snap-align:center;cursor:pointer;user-select:none}
.age-number.selected{color:var(--text);font-weight:600}.age-number small{font-size:13px;font-weight:400;margin-left:4px}
.slot-steps{display:flex;flex-direction:column;width:44px;flex:none}.slot-arrow{display:grid;place-items:center;width:44px;height:44px;background:none;border:0;border-radius:8px;color:var(--tint)}
.slot-arrow svg{width:16px;height:16px}.slot-arrow:hover{background:var(--tint-soft)}
.slot-hint{color:var(--secondary);font-size:12px;line-height:1.5;margin:8px 0 22px}
.entry-bottom{display:flex;justify-content:flex-end;padding-top:12px}.remove{min-height:44px;padding:0 4px 0 16px;border:0;border-radius:8px;background:none;color:var(--danger);font-size:14px}
.add{width:100%;min-height:48px;border:0;border-radius:12px;background:var(--surface);color:var(--tint);display:flex;align-items:center;justify-content:center;gap:8px;font-weight:500}.add:hover{background:var(--tint-soft)}
.note{color:var(--secondary);font-size:13px;line-height:1.65}.limit-note{margin:10px 8px 0}
.privacy-note{margin:24px 8px 0;padding-top:20px;border-top:1px solid var(--separator);font-size:13px;line-height:1.7;color:var(--secondary)}
.preview{position:sticky;top:84px;scroll-margin-top:84px}.preview-panel{background:var(--surface);padding:20px;border-radius:16px}
.paper-wrap{background:var(--inset);border-radius:10px;padding:20px}canvas{display:block;width:100%;height:auto;border:1px solid #0000000a;box-shadow:0 2px 8px #00000008}
.theme-row{border:0;margin:22px 0 0;padding:0;min-width:0}.theme-row legend{font-size:14px;font-weight:500;padding:0;margin-bottom:10px}
.theme-options{display:flex;gap:4px;padding:3px;background:var(--inset);border-radius:10px}
.theme{flex:1;min-width:0;min-height:44px;border:1px solid transparent;border-radius:8px;background:none;color:var(--secondary);font-size:13px;display:flex;justify-content:center;align-items:center;gap:6px;padding:6px 2px}
.theme[aria-pressed=true]{background:var(--surface);border-color:var(--separator);color:var(--text);font-weight:600;box-shadow:0 1px 3px #00000008}
.swatch{display:block;width:14px;height:14px;flex:none;background:var(--swatch);border:1px solid #0002;border-radius:50%}
.actions{display:flex;gap:10px;margin-top:20px}.actions button{flex:1;min-height:48px;border:0;border-radius:10px;display:flex;align-items:center;justify-content:center;gap:8px;font-size:15px;font-weight:500;padding:10px 8px}
.save{background:var(--tint);color:#fff}.save:hover{filter:brightness(1.08)}.share{background:var(--inset);color:var(--tint)}
.native-share{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;min-height:44px;background:none;border:0;border-radius:10px;color:var(--tint);font-size:14px;margin-top:8px}.native-share:hover{background:var(--tint-soft)}
.share-note{margin:12px 0 0}.status{margin:0;font-size:14px;line-height:1.6;color:var(--text)}.status:not(:empty){margin-top:12px}
footer{padding:48px 0 44px;margin-top:24px;font-size:13px}footer a{color:var(--secondary);display:inline-flex;align-items:center;min-height:44px}
.jump-preview,.back-edit{display:none}#editor{scroll-margin-top:84px}
@media(max-width:820px){
 .layout{grid-template-columns:minmax(0,1fr);gap:40px}.app-header nav,main{padding-left:20px;padding-right:20px}.app-header nav{min-height:56px}
 .page-heading{padding:32px 0 28px}h1{font-size:30px}.intro{font-size:16px}
 .jump-preview{display:inline-flex;align-items:center;gap:8px;min-height:44px;font-size:14px;margin-top:8px}.preview{position:static}
 .back-edit{display:inline-flex;align-items:center;min-height:44px;font-size:14px}.file-meta{display:none}.preview-panel,.paper-wrap{padding:16px}
 .entry summary,.entry-body{padding:16px}footer{padding-bottom:max(44px,env(safe-area-inset-bottom))}
}
@media(max-width:359px){.app-header nav,main{padding-left:16px;padding-right:16px}.ages{gap:8px}.slot-wrap{padding:0}.theme{gap:4px;font-size:12px}}
@media(prefers-color-scheme:dark){
 :root{--background:#000;--surface:#1c1c1e;--inset:#2c2c2e;--text:#f5f5f7;--secondary:#aeaeb2;--separator:#48484a;--tint:#479fff;--tint-soft:#152f4d;--danger:#ff6961;--header:rgba(18,18,20,.94)}
 .save{color:#001a35}canvas{border-color:transparent}
}
@media(prefers-contrast:more){:root{--secondary:#424245;--separator:#86868b}.age-slot{mask-image:none;-webkit-mask-image:none}}
@media(prefers-contrast:more) and (prefers-color-scheme:dark){:root{--secondary:#d1d1d6;--separator:#98989d}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;scroll-behavior:auto!important}}
/* The footer already provides the portal link on this page. */
body > a[aria-label="Back to Studio Toriumi"],
body > a[aria-label="スタジオトリウミのポータルへ戻る"] { display:none !important; }