*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #0f172a;--bg-card: #1e293b;--bg-bubble-src: #334155;--bg-bubble-tgt: #1d4ed8;--bg-clarify: #7c3aed;--text: #f1f5f9;--text-dim: #94a3b8;--accent: #3b82f6;--accent-glow: rgba(59, 130, 246, .4);--danger: #ef4444;--success: #22c55e;--radius: 16px;--radius-sm: 10px;--font-zh: "Noto Sans TC", sans-serif;--font-th: "Noto Sans Thai", sans-serif}body.light{--bg: #f1f5f9;--bg-card: #ffffff;--bg-bubble-src: #e2e8f0;--bg-bubble-tgt: #3b82f6;--bg-clarify: #8b5cf6;--text: #1e293b;--text-dim: #64748b;--accent: #2563eb;--accent-glow: rgba(37, 99, 235, .3)}body.light #role-screen{background:linear-gradient(160deg,#e0e7ff,#f1f5f9,#e0e7ff)}body.light .top-bar{background:#f1f5f9e6;border-bottom-color:#64748b26}body.light .quota-bar,body.light .quick-phrases,body.light .text-input-bar{background:#fffc}body.light .record-area{background:#f1f5f9f2}body.light .record-btn{box-shadow:0 4px 24px #2563eb4d}body.light .quota-toggle,body.light 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env(safe-area-inset-bottom,0px));overflow-y:auto;-webkit-overflow-scrolling:touch;background:linear-gradient(160deg,#0f172a,#1e1b4b,#0f172a)}#role-screen:before{content:"";flex:1}#role-screen:after{content:"";flex:1}.role-header{text-align:center}.app-logo{font-size:64px;margin-bottom:12px;animation:float 3s ease-in-out infinite}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}.role-header h1{font-size:32px;font-weight:900;letter-spacing:2px;background:linear-gradient(135deg,#60a5fa,#a78bfa);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.subtitle{color:var(--text-dim);font-size:14px;margin-top:8px}.gender-select{text-align:center;width:100%;max-width:400px}.gender-label{font-size:13px;color:var(--text-dim);display:block;margin-bottom:8px}.gender-buttons{display:flex;gap:8px}.gender-btn{flex:1;padding:10px;background:var(--bg-card);border:2px solid 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