:root{--bg:#f4faf9;--surface:#fff;--ink:#11282d;--muted:#6b7e82;--line:#dce9e8;--teal:#0e8f84;--teal2:#19aa9c;--deep:#0e2930;--soft:#e9f7f4;--danger:#b42318;--shadow:0 22px 60px rgba(17,40,45,.10);--radius:30px}*{box-sizing:border-box}html{background:var(--bg);-webkit-text-size-adjust:100%}body{margin:0;min-height:100vh;background:linear-gradient(180deg,#eef9f6 0,#f8fbfb 44%,#f4faf9 100%);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;-webkit-font-smoothing:antialiased}button,a{font:inherit}.app-shell{width:min(100%,720px);min-height:100dvh;margin:0 auto;position:relative;padding-bottom:max(24px,env(safe-area-inset-bottom))}.topbar{height:76px;padding:15px 20px 7px;display:flex;align-items:center;justify-content:space-between}.brand{border:0;background:none;color:inherit;display:flex;align-items:center;gap:10px;padding:0;cursor:pointer}.brand-mark{width:43px;height:43px;border-radius:15px;display:grid;place-items:center;background:linear-gradient(145deg,#102f36,#071e24);color:#fff;font-size:22px;font-weight:900;box-shadow:0 10px 24px rgba(14,41,48,.18)}.brand-name{font-size:21px;font-weight:900;letter-spacing:-.035em}.icon-btn,.back-btn{display:grid;place-items:center;border:1px solid var(--line);background:rgba(255,255,255,.8);color:var(--ink);box-shadow:0 8px 24px rgba(17,40,45,.04);cursor:pointer}.icon-btn{width:44px;height:44px;border-radius:16px}.icon-btn svg,.back-btn svg{width:21px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.view{display:none;padding:2px 20px 28px}.view.active{display:block}.home-hero{padding:43px 1px 28px}.hero-chip{display:inline-flex;align-items:center;gap:8px;padding:7px 11px;border-radius:999px;background:rgba(255,255,255,.78);border:1px solid #dceae8;color:#5f7679;font-size:11px;font-weight:850;letter-spacing:.05em}.live-dot{width:7px;height:7px;border-radius:50%;background:var(--teal)}.home-hero h1{margin:17px 0 0;font-size:clamp(43px,12vw,66px);line-height:.96;letter-spacing:-.065em}.home-hero h1 span{color:var(--teal)}.home-hero p{margin:19px 0 0;max-width:590px;font-size:16px;line-height:1.58;color:var(--muted)}.mode-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:12px}.mode-card{min-height:226px;border-radius:var(--radius);border:1px solid var(--line);padding:18px;display:flex;flex-direction:column;text-align:left;color:inherit;overflow:hidden}.translator-card{background:linear-gradient(155deg,#123139 0,#0d242a 60%,#0a1f24 100%);color:#fff;border-color:#15343a;box-shadow:0 25px 54px rgba(14,41,48,.18);cursor:pointer}.chat-card{background:#e9efef;color:#879598;border-color:#e1e8e8}.mode-topline{display:flex;align-items:center;justify-content:space-between}.mode-icon{width:47px;height:47px;border-radius:16px;display:grid;place-items:center;background:rgba(255,255,255,.12)}.chat-card .mode-icon{background:#d8e1e1}.mode-icon svg{width:24px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.go-arrow{font-size:25px;opacity:.8}.soon-pill{font-size:8px;letter-spacing:.08em;font-weight:900;padding:7px 8px;border-radius:999px;background:#d7dfdf;color:#7d8b8e}.mode-title{font-size:28px;font-weight:900;line-height:.98;letter-spacing:-.045em;margin-top:auto}.chat-card .mode-title{font-size:26px}.mode-sub{font-size:12px;line-height:1.4;margin-top:9px;opacity:.68}.benefits{margin-top:18px;padding:5px 2px;display:grid;gap:5px}.benefits>div{display:flex;gap:11px;align-items:flex-start;padding:11px 5px}.benefits svg{width:20px;min-width:20px;fill:none;stroke:var(--teal);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.benefits span{display:grid;gap:2px}.benefits b{font-size:13px}.benefits small{font-size:11px;line-height:1.45;color:var(--muted)}.footer-links{margin:25px 0 6px;display:flex;justify-content:center;gap:9px;font-size:11px;color:#8a999b}.footer-links a{color:inherit}.translator-view{padding-bottom:150px}.translator-head{display:grid;grid-template-columns:48px 1fr auto;align-items:center;gap:12px;padding:6px 0 13px}.back-btn{width:48px;height:48px;border-radius:17px}.translator-head-copy span{display:block;color:var(--teal);font-size:9px;font-weight:950;letter-spacing:.14em;margin-bottom:2px}.translator-head-copy h2{margin:0;font-size:21px;letter-spacing:-.035em}.auto-pill{font-size:9px;font-weight:950;letter-spacing:.1em;color:var(--teal);background:#dff4ef;border:1px solid #c8e9e2;border-radius:999px;padding:7px 9px}.stage{position:relative;border:1px solid #d7e8e5;border-radius:34px;background:linear-gradient(160deg,rgba(255,255,255,.96),rgba(246,252,251,.94));padding:28px 20px 22px;text-align:center;box-shadow:var(--shadow);overflow:hidden}.stage:before{content:"";position:absolute;width:190px;height:190px;border-radius:50%;background:rgba(23,170,156,.08);filter:blur(10px);right:-75px;top:-100px}.orb-wrap{position:relative;width:150px;height:150px;margin:2px auto 10px;display:grid;place-items:center}.orb-halo{position:absolute;border-radius:50%;border:1px solid rgba(14,143,132,.14);transition:.2s}.h1{width:106px;height:106px}.h2{width:128px;height:128px}.h3{width:150px;height:150px}.orb{width:84px;height:84px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(145deg,#e7f8f4,#dff4ef);color:var(--teal);box-shadow:inset 0 0 0 1px rgba(14,143,132,.08);transition:.22s}.orb svg{width:36px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.stage.listening .orb{background:linear-gradient(145deg,#0f978b,#0a796f);color:#fff;box-shadow:0 15px 35px rgba(14,143,132,.24)}.stage.listening .h1{animation:pulse 1.05s infinite}.stage.listening .h2{animation:pulse 1.05s .15s infinite}.stage.listening .h3{animation:pulse 1.05s .3s infinite}.stage.processing .orb{background:#e8eaff;color:#5c63cb}.stage.speaking .orb{background:#fff0d8;color:#a85c00}.stage.error .orb{background:#fff0ee;color:var(--danger)}@keyframes pulse{50%{transform:scale(1.08);opacity:.42}}.state-kicker{font-size:9px;font-weight:950;letter-spacing:.17em;color:var(--teal)}.state-title{margin-top:5px;font-size:24px;font-weight:950;letter-spacing:-.045em}.state-subtitle{min-height:38px;margin:5px auto 0;max-width:460px;font-size:13px;line-height:1.45;color:var(--muted)}.meter{height:4px;margin:10px auto 0;max-width:180px;background:#e6efee;border-radius:999px;overflow:hidden;opacity:0}.stage.listening .meter{opacity:1}.meter div{height:100%;width:7%;border-radius:inherit;background:var(--teal);transition:width .08s}.assist{margin-top:12px;border-top:1px solid #e6eeee;padding-top:12px}.assist>span{display:block;font-size:11px;color:var(--muted);margin-bottom:8px}.assist>div{display:grid;grid-template-columns:1fr 1fr;gap:8px}.assist button{min-height:45px;border-radius:14px;border:1px solid var(--line);background:#fff;color:var(--ink);font-weight:850}.conversation-card{margin-top:14px;border-radius:28px;border:1px solid var(--line);background:rgba(255,255,255,.86);padding:16px;box-shadow:0 12px 35px rgba(17,40,45,.05)}.conversation-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.conversation-head>span{font-size:12px;font-weight:900;color:#536b6f}.conversation-head button{border:0;background:none;color:var(--teal);display:flex;align-items:center;gap:5px;font-size:11px;font-weight:850;padding:7px}.conversation-head button:disabled{opacity:.3}.conversation-head svg{width:16px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.empty-state{min-height:150px;border:1px dashed #d3e3e1;border-radius:20px;background:#f8fbfb;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px;text-align:center}.empty-icon{width:42px;height:42px;border-radius:15px;display:grid;place-items:center;background:#e7f4f2;color:#5b7779;font-size:17px;font-weight:900;margin-bottom:10px}.empty-state strong{font-size:13px;color:#536a6d}.empty-state small{font-size:11px;color:#8a9b9e;margin-top:4px}.thread{display:flex;flex-direction:column;gap:10px}.message{border-radius:21px;border:1px solid var(--line);padding:14px;background:#fff}.message[data-lang="en"]{background:#102c33;color:#fff;border-color:#102c33}.msg-top{display:flex;align-items:center;justify-content:space-between;gap:10px}.msg-lang{font-size:9px;font-weight:950;letter-spacing:.09em;opacity:.55}.msg-replay{border:0;background:none;padding:3px;color:var(--teal);font-size:11px;font-weight:850}.message[data-lang="en"] .msg-replay{color:#9ee6dc}.msg-source{font-size:17px;font-weight:820;line-height:1.45;margin-top:5px}.msg-translation{font-size:16px;line-height:1.45;margin-top:9px;padding-top:9px;border-top:1px solid rgba(89,116,120,.16)}.message[data-lang="en"] .msg-translation{border-color:rgba(255,255,255,.13)}.bottom-dock{position:fixed;left:50%;bottom:0;transform:translateX(-50%);width:min(100%,720px);padding:13px 20px max(14px,env(safe-area-inset-bottom));background:linear-gradient(180deg,rgba(244,250,249,0),rgba(244,250,249,.94) 18%,#f4faf9 40%);z-index:10}.start-btn{width:100%;height:64px;border:0;border-radius:21px;background:linear-gradient(145deg,#123139,#0b242a);color:#fff;display:flex;align-items:center;justify-content:center;gap:11px;font-size:17px;font-weight:950;box-shadow:0 16px 35px rgba(14,41,48,.20);cursor:pointer}.start-btn.stop{background:#fff;color:var(--ink);border:1px solid var(--line);box-shadow:0 12px 28px rgba(17,40,45,.08)}.btn-icon{width:32px;height:32px;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.12)}.start-btn.stop .btn-icon{background:#eef4f4}.btn-icon svg{width:19px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}.dock-note{text-align:center;margin:7px 8px 0;color:#89999b;font-size:9px;line-height:1.35}.toast{position:fixed;left:50%;bottom:max(98px,calc(env(safe-area-inset-bottom) + 92px));transform:translate(-50%,16px);opacity:0;pointer-events:none;background:#102c33;color:#fff;padding:11px 14px;border-radius:14px;font-size:12px;max-width:calc(100vw - 34px);box-shadow:0 12px 30px rgba(0,0,0,.18);transition:.2s;z-index:30}.toast.show{opacity:1;transform:translate(-50%,0)}.hidden{display:none!important}@media(max-width:430px){.mode-grid{grid-template-columns:1fr 1fr}.mode-card{min-height:210px;padding:16px}.mode-title{font-size:25px}.chat-card .mode-title{font-size:23px}.home-hero{padding-top:28px}.home-hero h1{font-size:44px}}@media(max-width:350px){.view{padding-left:14px;padding-right:14px}.topbar{padding-left:14px;padding-right:14px}.mode-grid{grid-template-columns:1fr}.mode-card{min-height:170px}.bottom-dock{padding-left:14px;padding-right:14px}.translator-head{grid-template-columns:44px 1fr}.auto-pill{display:none}}@media(min-width:620px){.topbar{padding-left:28px;padding-right:28px}.view{padding-left:28px;padding-right:28px}.home-hero{padding-top:62px}.mode-card{min-height:250px}.stage{padding-top:34px}.bottom-dock{padding-left:28px;padding-right:28px}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}button:focus-visible,a:focus-visible{outline:3px solid rgba(14,143,132,.30);outline-offset:3px}

.mode-toggle{border:0;cursor:pointer}.noise-banner{margin-top:14px;padding:13px;border-radius:17px;background:#fff8e9;border:1px solid #f2dfb8;text-align:left}.noise-banner strong,.noise-banner span{display:block}.noise-banner strong{font-size:12px}.noise-banner span{font-size:11px;color:#7b6a4e;margin-top:3px;line-height:1.4}.noise-banner button{margin-top:9px;border:0;border-radius:12px;padding:9px 11px;background:#102c33;color:#fff;font-size:11px;font-weight:850}.hold-btn{width:100%;height:72px;border:0;border-radius:21px;background:linear-gradient(145deg,#0f978b,#08746b);color:#fff;display:grid;place-items:center;align-content:center;gap:2px;font-weight:950;box-shadow:0 16px 35px rgba(14,143,132,.22);touch-action:none;user-select:none}.hold-btn span{font-size:18px}.hold-btn small{font-size:10px;opacity:.75}.hold-btn.pressed{transform:scale(.985);filter:brightness(.94)}

/* RC3: explicit source-language selection */
.language-picker{display:grid;grid-template-columns:1fr 1fr;gap:12px;width:min(520px,100%);margin:18px auto 4px}
.lang-choice{appearance:none;border:1px solid rgba(21,58,68,.13);background:#fff;border-radius:18px;padding:16px 14px;min-height:74px;display:flex;flex-direction:column;align-items:flex-start;justify-content:center;box-shadow:0 8px 24px rgba(24,70,78,.08);transition:transform .16s ease,border-color .16s ease,box-shadow .16s ease,background .16s ease;color:#17333b}
.lang-choice:active{transform:scale(.985)}
.lang-choice.selected{border-color:#2d7a83;box-shadow:0 0 0 3px rgba(45,122,131,.12),0 10px 28px rgba(24,70,78,.12);background:#f7fcfc}
.lang-choice:disabled{opacity:.48;cursor:not-allowed}
.lang-main{font-size:1.23rem;font-weight:800;letter-spacing:-.02em}
.lang-sub{font-size:.78rem;color:#6f8085;margin-top:3px;font-weight:650}
.stage.listening .language-picker,.stage.processing .language-picker,.stage.speaking .language-picker{opacity:.58}
@media (max-width:390px){.language-picker{gap:9px}.lang-choice{padding:14px 11px;min-height:68px}.lang-main{font-size:1.12rem}}