:root{color-scheme:light dark;--bg:#f4f6f8;--card:#fff;--text:#101828;--muted:#667085;--border:#d0d5dd;--accent:#175cd3;--accent-soft:#eef4ff;--ja:#fff3e8;--foreign:#eef4ff;--danger:#b42318;--ok:#067647}
@media(prefers-color-scheme:dark){:root{--bg:#0b1220;--card:#111827;--text:#f9fafb;--muted:#98a2b3;--border:#344054;--accent-soft:#12213f;--ja:#332315;--foreign:#12213f}}
*{box-sizing:border-box}html{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP",sans-serif;background:var(--bg);color:var(--text)}body{margin:0;min-width:320px}button,select,textarea,input{font:inherit}button,select,input{min-height:48px}button{cursor:pointer}.app-shell{max-width:720px;margin:0 auto;padding:16px 14px 32px}.topbar,.section-title-row,.language-panel,.result-actions,footer,.room-header-card,.room-actions{display:flex;align-items:center}.topbar{justify-content:space-between;gap:12px;margin-bottom:12px}.eyebrow{font-size:11px;letter-spacing:.08em;color:var(--muted);font-weight:700}h1{font-size:24px;margin:2px 0 0}h2{font-size:17px;margin:0}.icon-btn{width:48px;border:1px solid var(--border);border-radius:14px;background:var(--card);color:var(--text);font-size:20px}.mode-tabs{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin-bottom:12px;padding:4px;border:1px solid var(--border);border-radius:16px;background:var(--card)}.mode-tab{border:0;border-radius:12px;background:transparent;color:var(--muted);font-weight:800}.mode-tab.active{background:var(--accent-soft);color:var(--text)}.language-panel{background:var(--card);border:1px solid var(--border);border-radius:18px;padding:10px 12px;justify-content:center;gap:10px;margin-bottom:12px}.lang-side{display:flex;gap:6px;align-items:center;font-size:17px}.flag{font-size:22px}.swap-mark{color:var(--muted);font-size:22px}.target-select select,.manual-form select,.settings-card input,.settings-card select,.form-card input,.form-card select{border:1px solid var(--border);border-radius:12px;background:var(--card);color:var(--text);padding:0 12px;font-weight:700;width:100%}.display-panel{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:14px;min-height:230px;display:flex;flex-direction:column}.status{font-size:13px;color:var(--muted);min-height:20px}.status.listening{color:var(--danger);font-weight:800}.status.busy{color:var(--accent);font-weight:800}.status.error{color:var(--danger);font-weight:800}.empty-state{margin:auto;text-align:center;color:var(--muted);line-height:1.8}.result-card{display:flex;flex-direction:column;gap:10px;flex:1}.speaker-line{display:flex;justify-content:space-between;color:var(--muted);font-size:12px}.translated{font-size:clamp(25px,7vw,38px);font-weight:800;line-height:1.35;margin:8px 0;overflow-wrap:anywhere}.original{font-size:16px;line-height:1.6;color:var(--muted);overflow-wrap:anywhere}details summary{cursor:pointer;color:var(--muted);padding:8px 0}.result-actions{gap:8px;margin-top:auto}.secondary-btn,.primary-btn,.text-btn{border-radius:12px;padding:0 15px}.secondary-btn{border:1px solid var(--border);background:var(--card);color:var(--text)}.primary-btn{border:0;background:var(--accent);color:#fff;font-weight:800}.text-btn{border:0;background:transparent;color:var(--accent);min-height:44px}.danger-text{color:var(--danger)}.compact{min-height:42px;padding:0 11px}.full-btn{width:100%;min-height:54px}.talk-controls{display:grid;grid-template-columns:1fr;gap:10px;margin:12px 0}.talk-btn{min-height:92px;border:1px solid var(--border);border-radius:20px;color:var(--text);font-size:21px;font-weight:900;display:flex;align-items:center;justify-content:center;gap:12px;box-shadow:0 1px 2px rgba(16,24,40,.06)}.talk-btn:disabled{opacity:.55;cursor:not-allowed}.talk-btn.listening{outline:4px solid rgba(244,63,94,.22);transform:scale(.995)}.ja-btn{background:var(--ja)}.foreign-btn{background:var(--foreign)}.room-talk-btn{width:100%;margin:12px 0;background:var(--accent-soft)}.mic{font-size:28px}.manual-panel,.history-panel,.form-card,.intro-card,.room-header-card{background:var(--card);border:1px solid var(--border);border-radius:18px;margin-top:12px;padding:12px 14px}.manual-panel>details>summary{font-weight:800;color:var(--text)}.manual-form{display:grid;gap:10px;margin-top:10px}.manual-form label,.settings-card label:not(.switch-row),.form-card label{display:grid;gap:6px;font-size:13px;color:var(--muted)}textarea{width:100%;border:1px solid var(--border);border-radius:12px;background:var(--card);color:var(--text);padding:12px;font-size:16px;resize:vertical}.section-title-row{justify-content:space-between;gap:8px}.history-list{display:grid;gap:8px;margin-top:8px}.history-item{border-top:1px solid var(--border);padding-top:10px}.history-item:first-child{border-top:0}.history-item .meta{font-size:11px;color:var(--muted)}.history-item .h-translated{font-weight:800;margin:4px 0}.history-item .h-original{font-size:13px;color:var(--muted);margin:0}.muted,.note,.privacy-note,.intro-card p{color:var(--muted);font-size:13px;line-height:1.6}.intro-card strong{font-size:16px}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:10px}.form-card{display:grid;gap:12px}.or-line{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:12px}.or-line:before,.or-line:after{content:"";height:1px;background:var(--border);flex:1}.room-code-input{text-transform:uppercase;letter-spacing:.16em;font-size:20px}.room-header-card{justify-content:space-between;gap:10px;margin-top:0}.room-actions{gap:4px}.mini-label{font-size:10px;letter-spacing:.08em;color:var(--muted);font-weight:800}.room-code{display:block;font-size:24px;letter-spacing:.12em}.participant-list{display:flex;gap:7px;overflow-x:auto;padding:10px 2px 2px}.participant-chip{white-space:nowrap;border:1px solid var(--border);border-radius:999px;background:var(--card);padding:7px 10px;font-size:12px}.participant-chip.offline{opacity:.55}.participant-chip.me{font-weight:900;border-color:var(--accent)}.room-display{margin-top:10px}.privacy-note{text-align:center;padding:0 8px}.hidden{display:none!important}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}footer{justify-content:space-between;gap:10px;flex-wrap:wrap;color:var(--muted);font-size:12px;padding:14px 4px 0}dialog{border:0;border-radius:20px;background:var(--card);color:var(--text);width:min(92%,520px);padding:0}dialog::backdrop{background:rgba(0,0,0,.5)}.settings-card{padding:16px;display:grid;gap:14px}.switch-row{display:flex;align-items:center;gap:10px}.switch-row input{width:22px;height:22px;min-height:auto}
@media(min-width:600px){.talk-controls{grid-template-columns:1fr 1fr}.talk-btn{min-height:110px}}
@media(max-width:420px){.two-col{grid-template-columns:1fr}.room-actions{align-items:flex-end;flex-direction:column}.room-header-card{align-items:flex-start}}
@media(prefers-reduced-motion:no-preference){.talk-btn{transition:transform .12s ease,outline .12s ease}}

/* v0.2.1: no-keyboard room code entry + manual speech ending */
.speech-end-panel{display:flex;align-items:center;justify-content:space-between;gap:10px;background:var(--card);border:1px solid var(--border);border-radius:16px;padding:10px 12px;margin:12px 0 0}.speech-end-copy{display:grid;gap:2px;min-width:0}.speech-end-copy strong{font-size:14px}.speech-end-copy span{font-size:11px;color:var(--muted);line-height:1.35}.segment-control{display:grid;grid-template-columns:1fr 1fr;gap:3px;padding:3px;border:1px solid var(--border);border-radius:12px;background:var(--bg);flex:0 0 auto}.segment-btn{min-height:42px;border:0;border-radius:9px;background:transparent;color:var(--muted);padding:0 12px;font-size:13px;font-weight:800}.segment-btn.active{background:var(--accent-soft);color:var(--text);box-shadow:0 0 0 1px var(--border)}.room-speech-end{margin-top:10px}.field-label{font-size:13px;color:var(--muted);font-weight:700}.room-code-entry{display:grid;gap:9px}.small-segments .segment-btn{min-height:40px;padding:0 9px;font-size:12px}.room-code-slots{display:grid;grid-template-columns:repeat(6,1fr);gap:6px}.code-slot{display:flex;align-items:center;justify-content:center;min-width:0;height:52px;border:1px solid var(--border);border-radius:11px;background:var(--bg);font-size:22px;font-weight:900;color:var(--muted)}.code-slot.filled{background:var(--accent-soft);color:var(--text);border-color:var(--accent)}.room-code-keypad{display:grid;grid-template-columns:repeat(6,1fr);gap:6px}.code-key{min-width:0;min-height:46px;border:1px solid var(--border);border-radius:11px;background:var(--card);color:var(--text);font-size:17px;font-weight:900;padding:0}.code-key:active{background:var(--accent-soft)}.code-edit-actions{display:grid;grid-template-columns:1fr 1fr;gap:7px}.code-note{margin:0}.talk-btn.listening{background:#fff0f0;border-color:#d92d20;color:#8f1d18}.talk-btn.listening .mic{filter:saturate(.8)}
@media(max-width:420px){.speech-end-panel{align-items:stretch;flex-direction:column}.segment-control{width:100%}.room-code-keypad{grid-template-columns:repeat(6,1fr);gap:5px}.code-key{min-height:44px;padding:0}.code-slot{height:48px}}

/* v0.2.2: settings consolidation, cancellable speech, room invite QR */
.settings-section{display:grid;gap:10px;border-top:1px solid var(--border);padding-top:14px}.settings-section:first-of-type{border-top:0;padding-top:0}.settings-section-title{font-size:14px;font-weight:900}.settings-segments{width:100%}.speech-cancel-bar{display:flex;align-items:center;justify-content:space-between;gap:10px;background:var(--card);border:1px solid #fda29b;border-radius:14px;padding:8px 10px;margin:-3px 0 12px;color:var(--muted);font-size:12px}.cancel-speech-btn{min-height:44px;border:1px solid #fda29b;border-radius:11px;background:#fff1f0;color:#b42318;font-weight:900;padding:0 12px;white-space:nowrap}.qr-share-panel{display:grid;justify-items:center;gap:9px;padding:12px;border:1px solid var(--border);border-radius:16px;background:var(--bg)}.qr-code-box{display:flex;align-items:center;justify-content:center;width:min(100%,244px);min-height:244px;padding:12px;background:#fff;border-radius:12px}.qr-code-box img,.qr-code-box canvas{display:block;max-width:100%;height:auto!important}.qr-room-code{font-size:22px;letter-spacing:.12em}.qr-note{text-align:center;margin:0}.qr-error{color:var(--danger);font-size:13px;line-height:1.5;text-align:center;margin:auto}.settings-card .secondary-btn:disabled{opacity:.5;cursor:not-allowed}
@media(max-width:420px){.speech-cancel-bar{align-items:stretch;flex-direction:column}.cancel-speech-btn{width:100%}.qr-code-box{width:224px;min-height:224px}}
.step-heading{display:flex;align-items:center;gap:9px;margin-top:2px}.step-heading strong{font-size:16px}.step-badge{display:inline-flex;align-items:center;justify-content:center;min-height:28px;padding:0 9px;border-radius:999px;background:var(--accent-soft);color:var(--text);font-size:11px;font-weight:900;letter-spacing:.04em}.room-create-block{display:grid;gap:7px;padding:11px 12px;border:1px solid var(--border);border-radius:14px;background:var(--bg)}.room-create-block>.note{margin:0}.step-divider{height:1px;background:var(--border);margin:2px 0}

.settings-room-create,.settings-room-share{display:grid;gap:10px}.settings-room-create>strong{font-size:15px}.room-create-hint{background:var(--card)}

/* v0.3.3: mobile settings reliability */
.settings-version{font-size:11px;color:var(--muted);text-align:center;margin-top:-4px}
dialog.fallback-open{display:block;position:fixed;inset:12px;z-index:1000;max-height:calc(100% - 24px);overflow:auto;margin:auto}
body.dialog-fallback-open:before{content:"";position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:999}
@media(max-width:420px){dialog{width:calc(100% - 20px);max-height:calc(100% - 20px);overflow:auto}.settings-card{padding:14px}.settings-room-create .two-col{grid-template-columns:1fr}.settings-room-create input,.settings-room-create select{font-size:16px}}