/* 基本のリセット */
*,*::before,*::after{box-sizing:border-box}
html{color-scheme:light;-webkit-text-size-adjust:100%;padding-top:env(safe-area-inset-top,0px)}
body{margin:0}
img{max-width:100%}
[hidden]{display:none!important}

/* Layout: Instagram風の1カラム・フィード（最大470px）＋下部タブバー＋投稿シート */
:root{
  --bg:#fbfaf8; --surface:#ffffff; --fg:#1d1f24; --muted:#6c6f78; --line:#e7e4df;
  --accent:#2c4f8c; --accent-fg:#ffffff; --chip:#f1efeb; --danger:#c0392b;
  --font-display:"Yusei Magic","Zen Kaku Gothic New",system-ui,sans-serif;
  --font-body:"Zen Kaku Gothic New","Hiragino Sans","Yu Gothic",system-ui,sans-serif;
  --r:14px;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#121317; --surface:#1a1c21; --fg:#eceae6; --muted:#9a9ca4; --line:#2a2d34;
  --accent:#8fb0ec; --accent-fg:#0f1420; --chip:#24272e; --danger:#ef7a6c; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#121317; --surface:#1a1c21; --fg:#eceae6; --muted:#9a9ca4; --line:#2a2d34;
  --accent:#8fb0ec; --accent-fg:#0f1420; --chip:#24272e; --danger:#ef7a6c; color-scheme:dark}
html,body{height:100%}
body{background:var(--bg);color:var(--fg);font-family:var(--font-body);font-size:15px;line-height:1.6}
*{box-sizing:border-box}
button{font:inherit;color:inherit;cursor:pointer}
button:focus-visible,textarea:focus-visible,label:focus-within{outline:2px solid var(--accent);outline-offset:2px}
.app{max-width:470px;margin:0 auto;min-height:100%;padding-bottom:calc(64px + env(safe-area-inset-bottom,0px))}
header.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:5;background:var(--bg);display:flex;align-items:center;justify-content:space-between;padding:10px 16px;border-bottom:1px solid var(--line)}
.logo{font-family:var(--font-display);font-size:26px;letter-spacing:.02em;line-height:1}
.logo small{font-family:var(--font-body);font-size:11px;color:var(--muted);margin-left:8px;letter-spacing:.08em}
.icon-btn{background:none;border:0;padding:6px;border-radius:10px;display:grid;place-items:center}
.icon-btn svg{width:26px;height:26px}
.notice{margin:12px 16px 0;padding:10px 12px;border-radius:10px;background:var(--chip);color:var(--muted);font-size:13px}

/* ストーリー風：気分の記録 */
.moods-strip{display:flex;gap:14px;overflow-x:auto;padding:14px 16px;border-bottom:1px solid var(--line);scrollbar-width:none}
.moods-strip::-webkit-scrollbar{display:none}
.story{display:flex;flex-direction:column;align-items:center;gap:4px;flex:0 0 auto;width:64px;font-size:11px;color:var(--muted);background:none;border:0;padding:0}
.story .ring{width:60px;height:60px;border-radius:50%;padding:3px;background:conic-gradient(var(--c1),var(--c2),var(--c1))}
.story .ring span{display:grid;place-items:center;width:100%;height:100%;border-radius:50%;background:var(--surface);border:2px solid var(--bg);font-size:24px;overflow:hidden}
.story .ring img{width:100%;height:100%;object-fit:cover}
.story.active b{color:var(--fg)}
.story b{font-weight:500}

/* 投稿カード */
.feed{display:flex;flex-direction:column}
.post{border-bottom:1px solid var(--line);padding-bottom:12px}
.post-head{display:flex;align-items:center;gap:10px;padding:10px 16px}
.avatar{width:34px;height:34px;border-radius:50%;padding:2px;background:conic-gradient(var(--c1),var(--c2),var(--c1))}
.avatar span{display:grid;place-items:center;width:100%;height:100%;border-radius:50%;background:var(--surface);border:2px solid var(--bg);font-size:15px}
.post-head .who{flex:1;min-width:0;line-height:1.3}
.post-head .who strong{font-size:14px;display:block}
.post-head .who small{color:var(--muted);font-size:12px}
.carousel{position:relative;background:var(--chip)}
.track{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;scrollbar-width:none;aspect-ratio:1/1;max-width:100%}
.track::-webkit-scrollbar{display:none}
.slide{flex:0 0 100%;scroll-snap-align:center;position:relative}
.slide img{width:100%;height:100%;object-fit:cover;display:block}
.slide .tag{position:absolute;left:10px;top:10px;font-size:11px;background:rgba(0,0,0,.55);color:#fff;padding:2px 8px;border-radius:99px;letter-spacing:.05em}
.counter{position:absolute;right:10px;top:10px;font-size:12px;background:rgba(0,0,0,.55);color:#fff;padding:2px 9px;border-radius:99px;font-variant-numeric:tabular-nums}
.nav-arrow{position:absolute;top:50%;transform:translateY(-50%);width:30px;height:30px;border-radius:50%;border:0;background:rgba(255,255,255,.85);color:#222;display:grid;place-items:center;box-shadow:0 1px 4px rgba(0,0,0,.2)}
.nav-arrow.prev{left:8px}.nav-arrow.next{right:8px}
@media (hover:none){.nav-arrow{display:none}}
.dots{display:flex;justify-content:center;gap:5px;padding:10px 0 2px}
.dots i{width:6px;height:6px;border-radius:50%;background:var(--line);transition:background .2s}
.dots i.on{background:var(--accent)}
.actions{display:flex;align-items:center;gap:6px;padding:2px 10px}
.actions .sp{flex:1}
.liked svg{fill:#e2445c;stroke:#e2445c}
.post-body{padding:2px 16px}
.mood-chip{display:inline-flex;align-items:center;gap:4px;font-size:12px;padding:2px 10px;border-radius:99px;background:var(--chip);margin-bottom:6px}
.mood-chip i{width:8px;height:8px;border-radius:50%;background:var(--c1)}
.illu-title{font-family:var(--font-display);font-size:13px;color:var(--muted);margin-left:6px}
.chips{display:inline-flex;flex-wrap:wrap;gap:4px;margin-right:4px}
.mix{display:flex;flex-wrap:wrap;gap:10px;font-size:12px;color:var(--muted);min-height:22px;align-items:center}
.mix span{display:inline-flex;align-items:center;gap:3px}
.mix i{width:14px;height:14px;border-radius:50%;display:inline-block;opacity:.85}
.palette{display:flex;gap:3px;margin-top:10px;flex-wrap:wrap}
.palette i{width:14px;height:14px;border-radius:50%;opacity:.8}
.tags{margin:4px 0 0;color:var(--accent);font-size:14px;word-break:break-word}
.words{display:flex;flex-wrap:wrap;gap:6px;min-height:30px;align-items:center}
.word{border:1.5px solid var(--line);background:var(--surface);border-radius:99px;padding:4px 12px;font-size:13px;display:inline-flex;align-items:baseline;gap:6px}
.word small{color:var(--muted);font-size:11px}
.word.on{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 12%,var(--surface));font-weight:700}
.word-tools{display:flex;gap:6px;flex-wrap:wrap}
.word-tools input{flex:1;min-width:140px;border:1px solid var(--line);border-radius:10px;padding:8px 10px;background:var(--bg);color:var(--fg);font:inherit}
.word-tools .btn{padding:8px 12px}
.hint{color:var(--muted);font-size:12px}
.seg{display:inline-flex;background:var(--chip);border-radius:10px;padding:3px;gap:2px;align-self:flex-start}
.seg button{border:0;background:none;padding:6px 14px;border-radius:8px;font-size:13px;color:var(--muted)}
.seg button[aria-checked="true"]{background:var(--surface);color:var(--fg);font-weight:700;box-shadow:0 1px 3px rgba(0,0,0,.12)}
.preview{grid-template-columns:150px 1fr!important}
.working{display:inline-flex;gap:8px;align-items:center}
.caption{white-space:pre-wrap;word-break:break-word;margin:0}
.caption strong{margin-right:6px}

/* グリッド（プロフィール） */
.profile{display:flex;gap:18px;align-items:center;padding:18px 16px}
.profile .big{width:76px;height:76px}
.profile .big span{font-size:32px}
.stats{display:flex;gap:18px;font-size:13px;color:var(--muted)}
.stats b{display:block;color:var(--fg);font-size:17px;font-variant-numeric:tabular-nums}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:2px}
.grid button{border:0;padding:0;aspect-ratio:1/1;background:var(--chip);position:relative}
.grid img{width:100%;height:100%;object-fit:cover;display:block}
.grid .d{position:absolute;left:6px;bottom:4px;color:#fff;font-size:11px;text-shadow:0 1px 3px rgba(0,0,0,.7)}

.empty{padding:48px 24px;text-align:center;color:var(--muted)}
.empty h2{font-family:var(--font-display);font-weight:400;color:var(--fg);font-size:22px;margin:0 0 6px}
.btn{border:0;border-radius:10px;padding:10px 16px;background:var(--accent);color:var(--accent-fg);font-weight:700}
.btn.ghost{background:var(--chip);color:var(--fg);font-weight:500}
.btn:disabled{opacity:.45;cursor:not-allowed}

/* タブバー */
nav.tabs{position:fixed;left:0;right:0;bottom:0;z-index:6;background:var(--bg);border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom,0px)}
nav.tabs div{max-width:470px;margin:0 auto;display:flex;justify-content:space-around;padding:6px 0}
nav.tabs button{background:none;border:0;padding:8px 18px;border-radius:10px;color:var(--muted)}
nav.tabs button[aria-current="true"]{color:var(--fg)}
nav.tabs svg{width:26px;height:26px;display:block}
.plus{background:var(--accent)!important;color:var(--accent-fg)!important;border-radius:12px!important;padding:6px 22px!important}

/* 投稿シート */
.sheet-wrap{position:fixed;inset:0;z-index:20;background:rgba(10,12,16,.45);display:flex;align-items:flex-end;justify-content:center}
.sheet{background:var(--surface);width:100%;max-width:520px;max-height:94%;overflow-y:auto;border-radius:18px 18px 0 0;padding:0 16px calc(20px + env(safe-area-inset-bottom,0px))}
.sheet-head{position:sticky;top:0;background:var(--surface);display:flex;align-items:center;justify-content:space-between;padding:12px 0;border-bottom:1px solid var(--line);margin-bottom:14px;z-index:2}
.sheet-head h2{font-size:16px;margin:0}
.step{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}
.step > label, .step > .lbl{font-size:12px;font-weight:700;letter-spacing:.08em;color:var(--muted)}
.slots{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.slot{position:relative;aspect-ratio:1/1;border:1.5px dashed var(--line);border-radius:12px;display:grid;place-items:center;background:var(--chip);overflow:hidden;color:var(--muted);font-size:12px;text-align:center}
.slot input{position:absolute;inset:0;opacity:0;cursor:pointer}
.slot img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.slot .n{position:absolute;left:6px;top:4px;font-size:11px;font-weight:700;color:#fff;text-shadow:0 1px 3px rgba(0,0,0,.6);z-index:1}
.slot .x{position:absolute;right:4px;top:4px;z-index:2;width:24px;height:24px;border-radius:50%;border:0;background:rgba(0,0,0,.6);color:#fff;font-size:14px;line-height:1}
textarea{width:100%;min-height:96px;resize:vertical;border:1px solid var(--line);border-radius:12px;padding:10px 12px;background:var(--bg);color:var(--fg);font:inherit}
.count{font-size:12px;color:var(--muted);text-align:right;font-variant-numeric:tabular-nums}
.mood-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.mood-btn{border:1.5px solid var(--line);background:var(--surface);border-radius:12px;padding:8px 2px;display:flex;flex-direction:column;align-items:center;gap:2px;font-size:12px}
.mood-btn .e{font-size:22px;line-height:1.2}
.mood-btn[aria-pressed="true"]{border-color:var(--c1);background:color-mix(in srgb,var(--c1) 22%,var(--surface));font-weight:700}
.preview{display:grid;grid-template-columns:120px 1fr;gap:12px;align-items:center}
.preview .pv{aspect-ratio:1/1;border-radius:12px;background:var(--chip);overflow:hidden;display:grid;place-items:center;color:var(--muted);font-size:12px;text-align:center;padding:0}
.preview .pv img{width:100%;height:100%;object-fit:cover}
.preview .side{display:flex;flex-direction:column;gap:8px;min-width:0}
.status{font-size:12px;color:var(--muted);min-height:1.4em}
.status.err{color:var(--danger)}
.spin{width:22px;height:22px;border:3px solid var(--line);border-top-color:var(--accent);border-radius:50%;animation:sp 0.9s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}
.submit-row{display:flex;gap:8px}
.submit-row .btn{flex:1;padding:12px}
.confirm{padding:16px 0}
.confirm p{margin:0 0 12px}
.toast{position:fixed;left:50%;bottom:calc(84px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);background:var(--fg);color:var(--bg);padding:8px 16px;border-radius:99px;font-size:13px;z-index:30}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* ===== アプリ版の追加スタイル ===== */
body.signed-out nav.tabs, body.signed-out #hdrNew{display:none}
.auth{display:flex;flex-direction:column;gap:20px;padding:40px 16px}
.auth-hero{text-align:center}
.auth-hero p{color:var(--muted);margin:10px 0 0}
.auth-form{display:flex;flex-direction:column;gap:8px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px}
.auth-form label{font-size:12px;font-weight:700;color:var(--muted);letter-spacing:.06em;margin-top:6px}
.auth-form input{border:1px solid var(--line);border-radius:10px;padding:10px 12px;background:var(--bg);color:var(--fg);font:inherit}
.auth-form .btn{margin-top:10px;padding:12px}
.auth-form .seg{align-self:stretch;display:flex}
.auth-form .seg button{flex:1}
.seg button[aria-selected="true"]{background:var(--surface);color:var(--fg);font-weight:700;box-shadow:0 1px 3px rgba(0,0,0,.12)}
.btn.small{padding:6px 12px;font-size:13px}
.btn.danger{background:var(--danger);color:#fff}
.like-n{font-size:13px;font-weight:700;font-variant-numeric:tabular-nums}
.lock{font-size:12px}
.switch{display:grid;grid-template-columns:auto 1fr;gap:2px 10px;align-items:center;margin-bottom:16px;cursor:pointer}
.switch input{width:20px;height:20px;accent-color:var(--accent);grid-row:span 2}
.switch span{font-weight:700;font-size:14px}
.switch small{color:var(--muted);font-size:12px}
.profile .btn{align-self:flex-start}
.post-hint{text-align:center;margin:8px 0 0}