:root{--bg: #f5f7fb;--panel: #ffffff;--border: #e3e8f0;--text: #1f2430;--muted: #6b7280;--primary: #4f46e5;--primary-dark: #4338ca;--ai-bubble: #eef1fb;--user-bubble: #dbe9ff;--green: #10b981;--red: #ef4444;--amber: #f59e0b;--radius: 14px}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;font-size:16px;background:var(--bg);color:var(--text)}.app{position:relative;height:100vh;height:100dvh;display:grid;grid-template-rows:auto 1fr auto;grid-template-columns:1fr 320px;grid-template-areas:"header header" "chat   side" "footer footer"}.header{grid-area:header;position:relative;z-index:40;display:flex;align-items:center;gap:16px;padding:0 20px;background:var(--panel);border-bottom:1px solid var(--border);flex-wrap:wrap;min-height:56px}.logo{font-size:17px}.scenario-select{margin-left:auto;min-width:0;padding:6px 10px;border:1px solid var(--border);border-radius:8px;background:#fff;font-size:16px;cursor:pointer;max-width:220px}.status-dot{font-size:13px;margin-left:8px}.chat{grid-area:chat;overflow-y:auto;padding:16px 20px;scroll-behavior:smooth}.chat-inner{max-width:720px;margin:0 auto 56px}.welcome{text-align:center;color:var(--muted);margin-top:80px}.welcome h2{font-size:24px;color:var(--text);margin-bottom:12px}.welcome p{margin:6px 0}.welcome-trial{font-size:13px;color:var(--primary);font-weight:600;margin-top:14px}.welcome-upgrade{margin-top:12px;padding:8px 18px;border-radius:999px;border:1px solid var(--primary-dark);background:var(--primary);color:#fff;font-family:inherit;font-size:14px;font-weight:600;cursor:pointer;transition:background .15s}.welcome-upgrade:hover{background:var(--primary-dark)}.scenario-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(110px,1fr));gap:10px;max-width:600px;margin:22px auto 0}.scenario-card{position:relative;display:flex;flex-direction:column;align-items:center;gap:4px;padding:14px 8px 12px;background:var(--panel);border:1px solid var(--border);border-radius:12px;cursor:pointer;color:var(--text);font-family:inherit;transition:border-color .15s,transform .15s,box-shadow .15s}.scenario-card:hover{border-color:var(--primary);transform:translateY(-2px)}.scenario-card.is-active{border-color:var(--primary);box-shadow:0 0 0 2px #4f46e52e}.scenario-card.is-locked{opacity:.62}.scenario-card.is-locked:hover{opacity:.9}.scenario-card-icon{font-size:22px;line-height:1}.scenario-card-label{font-size:13px;font-weight:600}.scenario-card-tier{font-size:11px;color:var(--muted)}.scenario-card.is-locked .scenario-card-tier{color:var(--amber)}.scenario-lock{position:absolute;top:6px;right:8px;font-size:12px}.hero-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:12px;max-width:640px;margin:24px auto 0}.hero-card{position:relative;display:flex;flex-direction:column;align-items:flex-start;gap:6px;padding:16px 14px;background:var(--panel);border:1px solid var(--border);border-radius:14px;cursor:pointer;text-align:left;color:var(--text);font-family:inherit;transition:border-color .15s,transform .15s,box-shadow .15s}.hero-card:hover{border-color:var(--primary);transform:translateY(-3px);box-shadow:0 8px 24px #0f172a14}.hero-card.is-active{border-color:var(--primary);box-shadow:0 0 0 2px #4f46e52e}.hero-card.is-locked{opacity:.78}.hero-card.is-locked:hover{opacity:1}.hero-card-icon{font-size:26px;line-height:1}.hero-card-title{display:flex;align-items:center;gap:6px;font-size:15px;font-weight:700;color:var(--text)}.hero-card-lock{font-size:12px}.hero-card-blurb{font-size:12.5px;color:var(--muted);line-height:1.5}.hero-card-cta{font-size:12.5px;font-weight:600;color:var(--primary);margin-top:auto}.hero-card.is-locked .hero-card-cta{color:var(--amber)}.welcome-sub{font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-top:30px}.welcome-sub:after{content:"";display:block;width:40px;height:1px;background:var(--border);margin:8px auto 0}.paywall-close{position:absolute;top:12px;right:14px;background:none;border:none;font-size:18px;line-height:1;color:var(--muted);cursor:pointer;padding:4px}.paywall-close:hover{color:var(--text)}.msg{display:flex;gap:10px;margin-bottom:14px;align-items:flex-start}.msg-avatar{width:34px;height:34px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:#fff;border:1px solid var(--border);font-size:16px;flex-shrink:0}.msg-user{flex-direction:row-reverse}.msg-bubble{padding:12px 16px;border-radius:var(--radius);max-width:75%;line-height:1.6;font-size:17px;background:var(--ai-bubble);border:1px solid var(--border);white-space:pre-wrap;overflow-wrap:anywhere}.msg-user .msg-bubble{background:var(--user-bubble);border-color:#bfd4ff}.msg-reveal{padding:8px 18px;border:1px solid var(--border);border-radius:var(--radius);background:var(--ai-bubble);color:var(--primary);font-size:15px;cursor:pointer}.msg-reveal:hover{background:#e2e7fb;border-color:var(--primary)}.msg-bubble.interim{opacity:.6;font-style:italic}.msg-bubble.thinking{color:var(--muted);font-style:italic;animation:pulse 1.4s infinite}.msg-bubble:has(.error),.msg .error{color:var(--red)}@keyframes pulse{50%{opacity:.4}}.msg-fix{margin-top:8px;padding:8px 12px;border-radius:8px;background:#fff7e6;border:1px solid #f0d9a8;font-size:15px}.msg-fix .msg-reason{color:var(--muted);margin-top:2px;font-size:14px}.feedback-side{grid-area:side;border-left:1px solid var(--border);background:var(--panel);overflow-y:auto;padding:16px}.feedback-panel{font-size:15px}.feedback-title{font-weight:600;margin-bottom:10px}.feedback-lock-hint{color:var(--muted);font-size:13px;line-height:1.7;padding:10px 12px;background:var(--bg);border:1px dashed var(--border);border-radius:8px}.feedback-flow{display:flex;align-items:center;gap:8px;margin-bottom:12px;color:var(--muted);font-size:14px}.flow-bar{flex:1;height:6px;background:var(--border);border-radius:3px;overflow:hidden}.flow-fill{height:100%;background:var(--green);transition:width .4s}.feedback-praise{background:#ecfdf5;border:1px solid #a7f3d0;color:#065f46;padding:8px 10px;border-radius:8px;margin-bottom:12px}.feedback-block{margin-bottom:14px}.feedback-block-title{font-weight:600;font-size:14px;color:var(--muted);margin-bottom:6px}.correction,.vocab{margin-bottom:8px;padding:8px 10px;background:var(--bg);border-radius:8px}.strike{text-decoration:line-through;color:var(--red);margin-right:6px}.arrow{color:var(--muted);margin-right:6px}.fix{color:var(--green);font-weight:500}.reason{color:var(--muted);font-size:13px;margin-top:4px}.prono{padding:6px 10px;background:#fef3c7;border-radius:8px;margin-bottom:6px;font-size:14px}footer{grid-area:footer;background:var(--panel);border-top:1px solid var(--border);padding:12px 20px 16px}@supports (padding-bottom: env(safe-area-inset-bottom)){footer{padding-bottom:calc(16px + env(safe-area-inset-bottom))}}.voice-controls{max-width:720px;margin:0 auto;display:flex;align-items:center;gap:12px;flex-wrap:wrap}.mic-btn{-webkit-touch-callout:none;-webkit-user-select:none;-khtml-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;width:60px;height:60px;border-radius:50%;border:none;background:var(--primary);color:#fff;font-size:26px;cursor:pointer;transition:transform .1s,background .2s;flex-shrink:0;touch-action:none;-webkit-tap-highlight-color:transparent}.voice-controls button{-webkit-touch-callout:none;-webkit-user-select:none;-khtml-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent}.mic-btn:hover{background:var(--primary-dark)}.mic-btn-listening{background:var(--red);transform:scale(1.1);box-shadow:0 0 0 8px #ef44442e}.mic-btn:disabled{opacity:.5;cursor:not-allowed}.stop-btn{width:44px;height:44px;border-radius:50%;border:1px solid var(--border);background:#fff;cursor:pointer}.speaking-dot{display:block;width:12px;height:12px;margin:0 auto;background:var(--green);border-radius:50%;animation:pulse 1s infinite}.text-input-form{display:flex;flex:1;min-width:180px}.text-input{flex:1;padding:10px 14px;border:1px solid var(--border);border-radius:10px 0 0 10px;font-size:16px;outline:none}.text-input:focus{border-color:var(--primary)}.send-btn{padding:0 16px;border:1px solid var(--border);border-left:none;border-radius:0 10px 10px 0;background:var(--primary);color:#fff;font-size:15px;cursor:pointer}.status-line{width:100%;display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px;margin-top:8px}.status-ok{color:var(--green)}.status-busy{color:var(--amber)}.status-off{color:var(--red)}.listening-hint{color:var(--red);font-weight:500}.speaking-hint{color:var(--green);font-weight:500}.err-hint{color:var(--red);font-weight:500}.asr-toggle{display:inline-flex;align-items:center;gap:4px;cursor:pointer;-webkit-user-select:none;user-select:none}.asr-toggle input{accent-color:var(--primary);margin:0}.tts-select{display:inline-flex;align-items:center;gap:6px}.tts-select select{font-size:16px;padding:2px 4px;border:1px solid #ddd;border-radius:6px;background:#fff;color:#333;cursor:pointer}.tts-replay{width:44px;height:44px;border-radius:50%;border:1px solid var(--border);background:#fff;cursor:pointer;font-size:18px;line-height:1;flex-shrink:0}.tts-replay:hover{border-color:var(--primary)}.tts-notice{border:none;background:none;cursor:pointer;color:var(--muted);font-size:13px;text-decoration:underline;padding:2px 4px;text-align:left}.tts-notice:hover{color:var(--text)}@media(max-width:860px){.app{grid-template-columns:1fr;grid-template-areas:"header" "chat" "footer"}.feedback-side{display:none}.header{gap:10px;padding:0 10px}}@media(max-width:700px){.header{gap:8px;padding:8px 10px}.header .scenario-select{flex:1 1 140px;max-width:46vw;margin-left:0}.chat{padding:12px 10px}.chat-inner{margin-bottom:40px;max-width:100%}.welcome{margin-top:36px}.welcome h2{font-size:21px}.hero-cards{grid-template-columns:1fr;max-width:420px}.scenario-cards{grid-template-columns:repeat(auto-fit,minmax(96px,1fr))}.msg-bubble{max-width:88%;font-size:16px}.voice-controls{gap:8px}.mic-btn{width:54px;height:54px;font-size:24px}.text-input-form{flex:1 1 150px;min-width:0}.status-line{font-size:12px}.banner{top:0}.auth-card,.gate-card,.paywall-card{padding:22px 18px}}button,select,input{-webkit-tap-highlight-color:transparent}.header-user{font-size:13px;color:var(--muted);max-width:200px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.logout-btn{flex-shrink:0;white-space:nowrap;display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 14px;border:1px solid var(--border);border-radius:8px;background:#fff;color:var(--text);font-size:13px;cursor:pointer}.logout-btn:hover{border-color:var(--primary);color:var(--primary)}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.auth-card{width:100%;max-width:400px;background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:28px;box-shadow:0 8px 30px #1f29370f}.auth-logo{font-size:18px;text-align:center;margin-bottom:6px}.auth-title{font-size:20px;text-align:center;margin-bottom:14px}.auth-sub{color:var(--muted);font-size:14px;text-align:center;margin-bottom:16px;line-height:1.5}.auth-form{display:flex;flex-direction:column;gap:14px}.auth-field{display:flex;flex-direction:column;gap:6px;font-size:14px;color:var(--muted)}.auth-field input{padding:10px 12px;border:1px solid var(--border);border-radius:10px;font-size:16px;outline:none;background:#fff;color:var(--text)}.auth-field input:focus{border-color:var(--primary)}.auth-submit{margin-top:4px;padding:11px;border:none;border-radius:10px;background:var(--primary);color:#fff;font-size:15px;cursor:pointer}.auth-submit:hover{background:var(--primary-dark)}.auth-submit:disabled{opacity:.6;cursor:not-allowed}.auth-err{background:#fef2f2;border:1px solid #fecaca;color:var(--red);padding:8px 10px;border-radius:8px;font-size:14px;line-height:1.5}.auth-ok{background:#ecfdf5;border:1px solid #a7f3d0;color:#065f46;padding:8px 10px;border-radius:8px;font-size:14px;line-height:1.6}.auth-links{display:flex;justify-content:space-between;gap:10px;margin-top:16px;font-size:14px;flex-wrap:wrap}.auth-links a{color:var(--primary);text-decoration:none;cursor:pointer}.auth-links a:hover{text-decoration:underline}.pw-rules{display:flex;flex-direction:column;gap:4px;font-size:13px;color:var(--muted);background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:10px 12px}.pw-rule.ok{color:var(--green)}.pw-hint{font-size:13px}.pw-hint.ok{color:var(--green)}.pw-hint.err{color:var(--red)}.trial-chip{padding:5px 11px;border-radius:999px;font-size:13px;font-weight:600;white-space:nowrap;background:#ecfdf5;border:1px solid #a7f3d0;color:#065f46}.trial-chip-guest{background:#eef2ff;border-color:#c7d2fe;color:#4338ca}.trial-chip-warn{background:#fef3c7;border-color:#fcd34d;color:#92400e;animation:pulse 1.4s infinite}.trial-chip-expired{background:#fee2e2;border-color:#fecaca;color:#991b1b}.trial-chip-pro{background:#4f46e5;border-color:#4338ca;color:#fff;font-family:inherit;cursor:pointer}.trial-chip-pro:hover{background:#4338ca}.header-upgrade{padding:5px 12px;border-radius:999px;font-size:13px;font-weight:600;white-space:nowrap;background:var(--primary);border:1px solid var(--primary-dark);color:#fff;font-family:inherit;cursor:pointer;transition:background .15s}.header-upgrade:hover{background:var(--primary-dark)}.banner{position:sticky;top:-16px;z-index:6;display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:10px 14px;border-radius:10px;margin-bottom:14px;font-size:14px;line-height:1.5}.banner-amber{background:#fffbeb;border:1px solid #fde68a;color:#92400e}.banner-icon{font-size:16px}.banner-text{flex:1;min-width:200px}.banner-btn{padding:6px 12px;border:1px solid #f59e0b;background:#fff;color:#92400e;border-radius:8px;font-size:13px;cursor:pointer}.banner-btn:hover{background:#fef3c7}.banner-btn:disabled{opacity:.6;cursor:not-allowed}.banner-msg{font-weight:600}.guest-gate,.paywall{position:absolute;grid-row:2 / 4;grid-column:1 / -1;top:0;right:0;bottom:0;left:0;z-index:30;display:flex;align-items:center;justify-content:center;padding:24px;overflow-y:auto;background:#f5f7fbe0;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.gate-card,.paywall-card{width:100%;max-width:440px;background:var(--panel);border:1px solid var(--border);border-radius:18px;padding:28px 26px;text-align:center;box-shadow:0 16px 48px #0f172a1f}.paywall-card{position:relative}.gate-badge,.paywall-badge{font-size:40px;margin-bottom:8px}.gate-card h2,.paywall-card h2{font-size:21px;margin-bottom:10px}.gate-card p,.paywall-sub{color:var(--muted);font-size:14px;line-height:1.7;margin-bottom:16px}.gate-actions{display:flex;gap:10px;margin:18px 0 12px}.gate-actions .auth-submit{flex:1}.gate-secondary{flex:1;padding:10px 16px;border:1px solid var(--border);background:#fff;color:var(--text);border-radius:8px;font-size:15px;cursor:pointer}.gate-secondary:hover{border-color:var(--primary);color:var(--primary)}.gate-hint,.paywall-hint{font-size:12px;color:var(--muted);margin-top:14px;line-height:1.6}.guest-gate{align-items:flex-start}.gate-card-seo{max-width:640px;text-align:left}.gate-card-seo .gate-badge{text-align:center}.gate-title{font-size:26px;line-height:1.25;text-align:center;margin-bottom:12px}.gate-lead{color:var(--muted);font-size:15px;line-height:1.7;text-align:center;margin-bottom:18px}.gate-card-seo .gate-actions{justify-content:center}.gate-card-seo .gate-hint{text-align:center}.gate-seo{margin-top:28px;border-top:1px solid var(--border);padding-top:20px}.gate-seo h2{font-size:15px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);text-align:center;margin-bottom:16px}.gate-faq{margin-bottom:16px}.gate-faq h3{font-size:15px;margin-bottom:4px}.gate-faq p{color:var(--muted);font-size:14px;line-height:1.65;margin:0}.paywall-actions{display:flex;justify-content:center}.paywall-actions .auth-submit{width:100%}.paywall-subscribe{margin-bottom:4px}.paywall-plans{display:flex;gap:8px;margin-bottom:10px}.paywall-plan{flex:1;display:flex;flex-direction:column;align-items:center;gap:4px;padding:10px 6px;border:1px solid var(--border);border-radius:10px;background:#fff;color:var(--text);cursor:pointer;font-size:13px;transition:border-color .15s,background .15s}.paywall-plan:hover{border-color:var(--primary)}.paywall-plan.is-active{border-color:#4f46e5;background:#eef2ff}.paywall-plan-price{font-size:15px;font-weight:600}.paywall-plan-label{color:var(--muted);font-size:12px}.paywall-stripe-btn{width:100%;background:#4f46e5}.paywall-stripe-btn:hover{background:#4338ca}.paywall-sub-hint{font-size:12px;color:var(--muted);line-height:1.6;margin:8px 0 0}@media(max-width:860px){.trial-chip{font-size:12px;padding:4px 8px}.header-upgrade{font-size:12px;padding:4px 9px}.header-user{display:none}}.survey-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:100;display:flex;align-items:center;justify-content:center;padding:24px;background:#1f293773;overflow-y:auto}.survey-card{width:100%;max-width:440px;background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:28px;box-shadow:0 8px 30px #1f29372e;display:flex;flex-direction:column}.survey-logo{font-size:18px;text-align:center;margin-bottom:10px}.survey-title{font-size:20px;text-align:center;margin-bottom:8px;line-height:1.35}.survey-sub{color:var(--muted);font-size:14px;text-align:center;margin-bottom:18px;line-height:1.5}.survey-options{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin-bottom:18px}.survey-option{display:flex;align-items:center;gap:8px;padding:10px 12px;border:1px solid var(--border);border-radius:10px;background:#fff;font-size:14px;cursor:pointer;transition:border-color .15s,background .15s}.survey-option:hover{border-color:var(--primary)}.survey-option.selected{border-color:var(--primary);background:#eef2ff}.survey-option input{accent-color:var(--primary)}.survey-skip{margin-top:10px;padding:9px;border:none;background:none;color:var(--muted);font-size:14px;cursor:pointer}.survey-skip:hover{color:var(--primary)}.survey-skip:disabled{opacity:.6;cursor:not-allowed}@media(max-width:480px){.survey-options{grid-template-columns:1fr}.survey-card{padding:22px 18px}}.legal-page{min-height:100vh;background:var(--bg);overflow-y:auto;padding:32px 20px 64px}.legal-inner{max-width:760px;margin:0 auto;background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:36px 34px;box-shadow:0 8px 30px #1f29370f;font-size:15px;line-height:1.75;color:var(--text)}.legal-back{display:inline-block;margin-bottom:18px;font-size:14px;color:var(--primary);text-decoration:none}.legal-back:hover{text-decoration:underline}.legal-inner h1{font-size:26px;line-height:1.3;margin-bottom:8px}.legal-inner h2{font-size:19px;margin:30px 0 10px;padding-top:20px;border-top:1px solid var(--border)}.legal-inner h3{font-size:15.5px;margin:18px 0 6px}.legal-inner p{margin-bottom:12px}.legal-inner ul{margin:0 0 12px 22px}.legal-inner li{margin-bottom:6px}.legal-inner a{color:var(--primary);text-decoration:none;overflow-wrap:anywhere}.legal-inner a:hover{text-decoration:underline}.legal-updated{color:var(--muted);font-size:13px;margin-bottom:8px}.legal-callout{background:#fffbeb;border:1px solid #fde68a;border-radius:10px;padding:12px 14px;color:#92400e}.legal-caps{text-transform:none;letter-spacing:.01em}.legal-contact{list-style:none;margin-left:0;padding-left:0}.legal-accept{margin-top:26px;padding-top:18px;border-top:1px solid var(--border);font-weight:600}@media(max-width:600px){.legal-page{padding:16px 12px 48px}.legal-inner{padding:24px 18px;font-size:14.5px}.legal-inner h1{font-size:22px}.legal-inner h2{font-size:17px}}.gate-legal{font-size:12px;color:var(--muted);text-align:center;margin-top:14px;line-height:1.6}.gate-legal a{color:var(--primary);text-decoration:none}.gate-legal a:hover{text-decoration:underline}.legal-table{width:100%;border-collapse:collapse;margin:0 0 14px;font-size:14px}.legal-table th,.legal-table td{border:1px solid var(--border);padding:8px 10px;text-align:left;vertical-align:top}.legal-table th{background:var(--bg);font-weight:600}.legal-note{margin-top:20px;padding:12px 14px;background:var(--bg);border:1px solid var(--border);border-radius:10px;font-size:13px;color:var(--muted);line-height:1.6}