:root{
  color-scheme:light;
  --bg:#F4F6F9;
  --surface:#FFFFFF;
  --ink:#1C2430;
  --muted:#6A7585;
  --line:#E2E7EE;
  --accent:#3B82E0;
  --accent-ink:#FFFFFF;
  --accent-soft:#E6F0FC;
  --pink:#E5557E;
  --pink-soft:#FCE7EE;
  --them:#EEF1F5;
  --good:#1F8A55;
  --warn:#B7791F;
  --bad:#C53B3B;
  --shadow:0 1px 3px rgba(28,36,48,.08);
  --round:"M PLUS Rounded 1c","Hiragino Maru Gothic ProN",sans-serif;
  --body:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Noto Sans JP","Yu Gothic UI",sans-serif;
  --nav-h:60px;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    color-scheme:dark;
    --bg:#0F141B;--surface:#18202A;--ink:#E6EBF2;--muted:#93A0B2;--line:#283241;
    --accent:#6AA6F0;--accent-ink:#0B1A2E;--accent-soft:#1A2B42;--pink:#F08BA7;--pink-soft:#3A2230;
    --them:#222C38;--good:#5CCB8F;--warn:#E3B04B;--bad:#F07C7C;--shadow:none;
  }
}
:root[data-theme="dark"]{
  color-scheme:dark;
  --bg:#0F141B;--surface:#18202A;--ink:#E6EBF2;--muted:#93A0B2;--line:#283241;
  --accent:#6AA6F0;--accent-ink:#0B1A2E;--accent-soft:#1A2B42;--pink:#F08BA7;--pink-soft:#3A2230;
  --them:#222C38;--good:#5CCB8F;--warn:#E3B04B;--bad:#F07C7C;--shadow:none;
}
*{box-sizing:border-box}
html,body{min-height:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);font-size:15px;line-height:1.65;-webkit-text-size-adjust:100%}
[hidden]{display:none!important}
img{max-width:100%}
h1,h2,h3{margin:0;line-height:1.35;text-wrap:balance}
h2{font-family:var(--round);font-size:17px}
p{margin:0}
.muted{color:var(--muted)}
.small{font-size:13px}
.num{font-variant-numeric:tabular-nums}

/* ===== アプリの枠 ===== */
.appbar{position:sticky;top:0;z-index:5;background:var(--surface);border-bottom:1px solid var(--line);padding-top:env(safe-area-inset-top,0px)}
.appbar .in{max-width:640px;margin:0 auto;height:52px;padding-inline:12px;display:grid;grid-template-columns:72px 1fr 72px;align-items:center}
.appbar h1{grid-column:2;font-family:var(--round);font-size:17px;text-align:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.appbar .back{grid-column:1;justify-self:start}
.appbar .bal{grid-column:3;justify-self:end;font-size:13px;font-weight:700;background:var(--accent-soft);color:var(--accent);border:0;border-radius:999px;padding:3px 10px;cursor:pointer;font-family:inherit}
.appbar .bal.low{background:var(--pink-soft);color:var(--pink)}
main{max-width:640px;margin:0 auto;padding-inline:16px;padding-block:14px calc(var(--nav-h) + 24px + env(safe-area-inset-bottom,0px))}
.stack{display:flex;flex-direction:column;gap:14px}

nav.tabbar{position:fixed;left:0;right:0;bottom:0;z-index:5;background:var(--surface);border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom,0px)}
nav.tabbar .in{max-width:640px;margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr);height:var(--nav-h)}
nav.tabbar button{border:0;background:none;color:var(--muted);font:inherit;font-size:11px;font-weight:700;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;cursor:pointer}
nav.tabbar button svg{width:24px;height:24px}
nav.tabbar button[aria-current="page"]{color:var(--accent)}

/* ===== 部品 ===== */
.card{background:var(--surface);border-radius:16px;padding:16px;display:flex;flex-direction:column;gap:12px;box-shadow:var(--shadow)}
.btn{font:inherit;font-weight:700;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--ink);padding:9px 16px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:6px;text-decoration:none}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.btn.pink{background:var(--pink);border-color:var(--pink);color:#fff}
.btn.ghost{background:transparent;border-color:transparent;color:var(--muted);padding-inline:8px}
.btn.danger{color:var(--bad)}
.btn.block{width:100%;padding-block:12px}
.btn.sm{font-size:13px;padding:5px 12px}
.btn:disabled{opacity:.45;cursor:not-allowed}
button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,label.btn:focus-within{outline:2px solid var(--accent);outline-offset:2px}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
textarea,input[type=text],select{font:inherit;color:var(--ink);background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:9px 12px;width:100%}
textarea{resize:vertical;min-height:60px}
.notice{background:var(--accent-soft);color:var(--ink);border-radius:12px;padding:10px 12px;font-size:13px}
.notice.pink{background:var(--pink-soft)}
.label{font-size:12px;font-weight:700;color:var(--muted);letter-spacing:.06em}

.avatar{flex:none;width:48px;height:48px;border-radius:50%;display:grid;place-items:center;font-family:var(--round);font-weight:700;font-size:19px;color:#fff}
.avatar.sm{width:36px;height:36px;font-size:15px}

/* ===== トーク一覧 ===== */
.talklist{background:var(--surface);border-radius:16px;overflow:hidden;box-shadow:var(--shadow)}
.talkrow{display:flex;gap:12px;align-items:center;padding:12px 14px;border:0;border-bottom:1px solid var(--line);background:none;width:100%;text-align:left;font:inherit;color:inherit;cursor:pointer}
.talkrow:last-child{border-bottom:0}
.talkrow .mid{flex:1;min-width:0;display:flex;flex-direction:column}
.talkrow .name{font-weight:700;display:flex;gap:8px;align-items:center}
.talkrow .snip{font-size:13px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.talkrow .time{font-size:11px;color:var(--muted);align-self:flex-start;white-space:nowrap}
.stepbadge{font-size:11px;font-weight:700;border-radius:999px;padding:0 8px;background:var(--accent-soft);color:var(--accent);white-space:nowrap}
.stepbadge.invite{background:var(--pink-soft);color:var(--pink)}

/* ===== トーク詳細 ===== */
.phead{display:flex;gap:12px;align-items:center}
.phead input{flex:1;min-width:0;font-family:var(--round);font-size:18px;font-weight:700;border:0;border-bottom:1px dashed var(--line);background:transparent;border-radius:0;padding:2px 0}
.rail{display:grid;grid-template-columns:repeat(5,1fr);gap:4px}
.rail button{border:0;background:var(--bg);color:var(--muted);font:inherit;font-size:12px;font-weight:700;padding:7px 2px 5px;border-radius:10px;cursor:pointer;display:flex;flex-direction:column;align-items:center;line-height:1.3}
.rail button .n{font-size:11px;font-variant-numeric:tabular-nums}
.rail button.done{background:var(--accent-soft);color:var(--accent)}
.rail button.now{background:var(--accent);color:var(--accent-ink)}
.rail button.now.invite{background:var(--pink);color:#fff}
.goal{font-size:13px;color:var(--muted)}
.notes{display:flex;flex-wrap:wrap;gap:6px}
.note{font-size:12px;background:var(--bg);color:var(--muted);border-radius:999px;padding:2px 10px}

.bubbles{display:flex;flex-direction:column;gap:8px}
.msg{display:flex;gap:8px;align-items:flex-end}
.msg.me{justify-content:flex-end}
.b{max-width:78%;padding:8px 13px;border-radius:18px;font-size:14px;white-space:pre-wrap;word-break:break-word}
.msg.them .b{background:var(--them);border-bottom-left-radius:6px}
.msg.me .b{background:var(--accent);color:var(--accent-ink);border-bottom-right-radius:6px}
.empty{font-size:13px;color:var(--muted);text-align:center;padding:8px}

.drop{border:1.5px dashed var(--line);border-radius:14px;padding:12px;display:flex;flex-direction:column;gap:10px;background:var(--bg)}
.drop.over{border-color:var(--accent);background:var(--accent-soft)}
.drop input[type=file]{position:absolute;width:1px;height:1px;opacity:0}
.thumbs{display:flex;gap:8px;flex-wrap:wrap}
.thumbs:empty{display:none}
.thumb{position:relative;width:60px;height:104px;border-radius:10px;overflow:hidden;border:1px solid var(--line);background:var(--them)}
.thumb img{width:100%;height:100%;object-fit:cover;display:block}
.thumb button{position:absolute;top:3px;right:3px;width:22px;height:22px;border-radius:50%;border:0;background:rgba(0,0,0,.6);color:#fff;font-size:13px;line-height:22px;padding:0;cursor:pointer}

.mood{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.pill{font-size:12px;font-weight:700;border-radius:999px;padding:1px 10px;border:1px solid currentColor}
.pill.high{color:var(--good)}.pill.mid{color:var(--warn)}.pill.low{color:var(--bad)}
.cands{display:flex;flex-direction:column;gap:14px}
.cand{display:flex;flex-direction:column;align-items:flex-end;gap:6px}
.cand .head{display:flex;gap:6px;align-items:center}
.cand .type{font-size:12px;font-weight:700;color:var(--muted)}
.cand .tag{font-size:11px;font-weight:700;color:#fff;background:var(--pink);border-radius:999px;padding:0 8px}
.cand textarea{width:86%;background:var(--accent-soft);border:1.5px dashed var(--accent);border-radius:18px;border-bottom-right-radius:6px;min-height:0;field-sizing:content;resize:none}
.cand.invite textarea{background:var(--pink-soft);border-color:var(--pink)}
.status{font-size:13px;color:var(--muted);text-align:center}
.status.err{color:var(--bad)}

/* ===== プロフィール ===== */
.fields{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.fields .wide{grid-column:1/-1}
.field{display:flex;flex-direction:column;gap:4px}
.field label{font-size:12px;font-weight:700;color:var(--muted)}
@media (max-width:480px){.fields{grid-template-columns:1fr}}

/* ===== 招待・明細 ===== */
.code{font-family:var(--round);font-size:32px;font-weight:700;letter-spacing:.18em;text-align:center;color:var(--pink);font-variant-numeric:tabular-nums}
.linkbox{font-size:12px;background:var(--bg);border-radius:10px;padding:8px 10px;word-break:break-all;user-select:all}
.stats{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.stat{background:var(--bg);border-radius:12px;padding:10px;text-align:center}
.stat b{display:block;font-family:var(--round);font-size:22px;font-variant-numeric:tabular-nums}
.balance-big{font-family:var(--round);font-size:34px;font-weight:700;font-variant-numeric:tabular-nums}
table.price,table.ledger{width:100%;border-collapse:collapse;font-size:14px}
table.price td,table.ledger td{padding:8px 0;border-bottom:1px solid var(--line);vertical-align:top}
table.price tr:last-child td,table.ledger tr:last-child td{border-bottom:0}
td.r{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
td.plus{color:var(--good)}
.ledger .when{font-size:12px;color:var(--muted);display:block}

/* ===== ログイン ===== */
.hero{display:flex;flex-direction:column;gap:14px;align-items:center;text-align:center;padding-block:18px 4px}
.hero h2{font-size:22px}
.hero .demo{width:100%;max-width:360px;display:flex;flex-direction:column;gap:8px;text-align:left}
.points{margin:0;padding-left:1.2em;display:flex;flex-direction:column;gap:4px;font-size:14px}
.privacy{font-size:12px;color:var(--muted);display:flex;flex-direction:column;gap:4px}
.privacy h3{font-size:13px;color:var(--ink)}
footer.foot{font-size:11px;color:var(--muted);text-align:center;padding-top:8px}

.toast{position:fixed;left:50%;bottom:calc(var(--nav-h) + 14px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);background:var(--ink);color:var(--bg);padding:8px 16px;border-radius:999px;font-size:13px;font-weight:700;max-width:calc(100% - 32px);z-index:10}
.confirm{background:var(--pink-soft);border-radius:12px;padding:10px;display:flex;gap:8px;align-items:center;flex-wrap:wrap;font-size:13px}
@media (prefers-reduced-motion:no-preference){.cand{animation:rise .25s ease both}@keyframes rise{from{transform:translateY(4px);opacity:.4}}}