/* Landing survey mini-app — xanh-trắng, mobile-first. */
.survey-box{background:#FBFCFD;border:1px solid rgba(13,31,51,.14);border-radius:18px;padding:34px;margin:20px 0;box-shadow:0 14px 40px rgba(13,31,51,.08)}
.survey-head{text-align:center;max-width:980px;margin:0 auto 22px}
.survey-head h2{font-family:"Playfair Display",serif;font-size:clamp(28px,3.3vw,42px);color:#0D1F33;margin:0 0 8px;text-wrap:balance}
.survey-head p{color:#3A4C60;font-size:16px;margin:0}
.survey-card{max-width:760px;margin:0 auto}
.survey-progress{height:8px;border-radius:999px;background:#E0E7EE;overflow:hidden;margin:10px 0 20px}
.survey-progress span{display:block;height:100%;width:0;background:#1C6FB8;transition:.25s}
.survey-q{font-size:22px;font-weight:800;color:#0D1F33;line-height:1.3;margin:0 0 14px}
.survey-options{display:grid;grid-template-columns:1fr 1fr;gap:10px;align-items:stretch}
.survey-opt{border:1px solid rgba(13,31,51,.14);background:#fff;color:#0D1F33;border-radius:10px;padding:13px 14px;text-align:left;font:600 14px "Be Vietnam Pro",sans-serif;cursor:pointer;min-height:72px}
.survey-opt:hover,.survey-opt.on{border-color:#1C6FB8;box-shadow:0 0 0 3px rgba(28,111,184,.12)}
.survey-actions{display:flex;gap:12px;justify-content:center;align-items:center;margin:20px auto 0;max-width:520px}
.survey-btn{border:0;border-radius:999px;background:#1C6FB8;color:#fff;font-weight:800;padding:13px 24px;cursor:pointer;min-height:46px;min-width:180px}
.survey-btn.alt{background:#EDF1F5;color:#0D1F33;border:1px solid rgba(13,31,51,.14)}
.survey-btn:disabled{cursor:not-allowed;box-shadow:none;filter:none}
.survey-btn:disabled:not(.alt){background:#D8E2EC;color:#7B8A99}
.survey-btn.alt:disabled{background:#F4F7FA;color:#9AA7B4;border-color:#E0E7EE}
.survey-hint{min-height:20px;margin-top:12px;color:#6F8090;font-size:13px;font-weight:600;text-align:center}
.survey-form{display:grid;gap:10px;margin-top:10px}
.survey-form input{width:100%;border:1px solid rgba(13,31,51,.18);border-radius:10px;padding:13px 14px;font:500 15px "Be Vietnam Pro",sans-serif}
.survey-result{background:#0D1F33;color:#F3EEE4;border-radius:14px;padding:22px;margin-top:16px}
.survey-result b{color:#fff}.survey-score{font:700 46px "Playfair Display",serif;color:#fff;line-height:1}
.survey-gift{display:inline-block;margin-top:12px;background:#C99A4E;color:#0D1F33;text-decoration:none;font-weight:800;padding:12px 18px;border-radius:999px}
.survey-note{font-size:12px;color:#6F8090;text-align:center;margin-top:12px}
@media(min-width:900px){.survey-head h2{white-space:nowrap}}
@media(max-width:640px){.survey-box{padding:20px;margin:16px 0}.survey-head h2{font-size:28px}.survey-options{grid-template-columns:1fr}.survey-opt{min-height:64px}.survey-actions{flex-direction:column-reverse}.survey-btn{width:100%;min-width:0}}