:root{
  --brand:#0a7d4b;      /* xanh VinaPool */
  --brand-2:#13b06b;
  --ink:#13233a;
  --muted:#6b7a90;
  --line:#e3e8ef;
  --bg:#eef2f7;
  --danger:#d92d20;
  --radius:14px;
  --font-ui:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
}
*{box-sizing:border-box;min-width:0}
html,body{margin:0;width:100%;max-width:100%;overflow-x:hidden}
body{
  font-family:var(--font-ui);
  color:var(--ink);
  overflow-x:hidden;                 /* chặn cuộn ngang do trang trí */
  /* Nền chủ đề xổ số Vietlott: xanh thương hiệu + ánh vàng kim */
  background:
    radial-gradient(900px 600px at 85% -10%, rgba(255,209,102,.28), transparent 60%),
    radial-gradient(700px 500px at 0% 110%, rgba(19,176,107,.45), transparent 60%),
    linear-gradient(135deg,#06623c 0%,#0a7d4b 45%,#075a39 100%);
  background-attachment:fixed;
  min-height:100vh;min-height:100dvh;
}
/* "Quả cầu số" may mắn — lớp cố định theo màn hình, KHÔNG tạo thanh cuộn */
body::before,body::after{
  content:"";position:fixed;border-radius:50%;pointer-events:none;
  filter:blur(.5px);opacity:.5;z-index:0;
}
body::before{
  width:180px;height:180px;top:-40px;left:-50px;
  background:radial-gradient(circle at 32% 30%,#ffe39a,#f6b733 70%);
  box-shadow:260px 120px 0 -30px rgba(255,255,255,.10);
}
body::after{
  width:130px;height:130px;bottom:-30px;right:-30px;
  background:radial-gradient(circle at 35% 30%,#7ff0bf,#13b06b 70%);
  box-shadow:-220px -60px 0 -40px rgba(255,255,255,.10);
}
.page{
  position:relative;z-index:1;
  height:100vh;height:100dvh;overflow:hidden;   /* khít màn hình, trang KHÔNG cuộn */
  display:flex;align-items:safe center;justify-content:center;
  padding:clamp(10px,3vh,28px) 16px;
}
.card{
  position:relative;z-index:1;
  width:100%;max-width:460px;
  max-height:100%;overflow-y:auto;overflow-x:hidden;  /* form dài thì tự cuộn trong thẻ */
  background:#fff;border-radius:var(--radius);
  padding:clamp(16px,2.6vh,26px) clamp(16px,4vw,24px);
  box-shadow:0 24px 60px rgba(0,0,0,.35);
  animation:rise .35s ease both;
  -webkit-overflow-scrolling:touch;
}
.card::-webkit-scrollbar{width:8px}
.card::-webkit-scrollbar-thumb{background:#cdd6e2;border-radius:8px}
@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

.brand{text-align:center;margin-bottom:clamp(10px,2vh,18px)}
.logo{
  display:block;margin:0 auto clamp(6px,1.4vh,12px);
  width:auto;height:auto;
  max-width:200px;
  max-height:clamp(56px,11vh,96px);   /* logo co theo chiều cao màn hình */
  object-fit:contain;
}
.brand h1{font-size:clamp(19px,2.4vh,22px);margin:0;font-weight:750}
.sub{margin:4px 0 0;color:var(--muted);font-size:13.5px}

.field{display:block;margin-bottom:clamp(9px,1.7vh,14px)}
.field>span{display:block;font-size:13px;font-weight:600;margin-bottom:6px;color:#33425a}
.field i{color:var(--danger);font-style:normal}
.field input,.field select{
  width:100%;padding:clamp(9px,1.5vh,12px) 13px;font-size:15px;
  border:1.5px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);
  transition:border-color .15s,box-shadow .15s;
  appearance:none;-webkit-appearance:none;
}
.field input::placeholder{color:#aab4c2}
.field input:focus,.field select:focus{
  outline:none;border-color:var(--brand-2);
  box-shadow:0 0 0 3px rgba(19,176,107,.15);
}
.field input:disabled{background:#f3f5f8;color:#7a879a;cursor:not-allowed}
.field select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%236b7a90' stroke-width='2.5'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 12px center;padding-right:36px}

.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.pw{position:relative}
.pw input{padding-right:42px}
.eye{
  position:absolute;right:6px;top:50%;transform:translateY(-50%);
  border:0;background:transparent;cursor:pointer;font-size:16px;
  width:32px;height:32px;border-radius:8px;opacity:.6;line-height:1;
}
.eye:hover{opacity:1;background:#f0f3f7}

.more-toggle{
  width:100%;margin:4px 0 clamp(9px,1.7vh,14px);
  display:flex;align-items:center;justify-content:space-between;gap:8px;
  background:#f4f7fb;border:1.5px dashed var(--line);color:var(--brand);
  font-weight:650;font-size:14px;padding:clamp(9px,1.5vh,11px) 14px;border-radius:10px;cursor:pointer;
  transition:background .15s;
}
.more-toggle:hover{background:#eaf1f8}
.more-toggle svg{transition:transform .2s}
.more-toggle[aria-expanded="true"] svg{transform:rotate(180deg)}
.more{animation:rise .25s ease both}

.btn{
  width:100%;padding:clamp(10px,1.7vh,13px);font-size:16px;font-weight:700;color:#fff;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  border:0;border-radius:11px;cursor:pointer;margin-top:4px;
  box-shadow:0 10px 22px rgba(10,125,75,.32);transition:transform .1s,filter .15s;
}
.btn:hover{filter:brightness(1.05)}
.btn:active{transform:translateY(1px)}
.btn:disabled{opacity:.6;cursor:progress}

.alert{
  padding:11px 13px;border-radius:10px;font-size:14px;margin-bottom:14px;line-height:1.45;
  border:1px solid;
}
.alert.error{background:#fef3f2;color:#b42318;border-color:#fecdca}
.alert.ok{background:#ecfdf3;color:#067647;border-color:#abefc6}

.grecaptcha-note{font-size:11.5px;color:var(--muted);margin:14px 0 0;text-align:center;line-height:1.5}
.grecaptcha-note a{color:var(--muted)}
.grecaptcha .grecaptcha-badge{visibility:hidden}

/* ----- Màn hình đăng ký thành công ----- */
.success-box{text-align:center;padding:8px 4px;animation:rise .3s ease both}
.success-icon{
  width:72px;height:72px;margin:6px auto 14px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:38px;color:#fff;font-weight:800;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  box-shadow:0 10px 24px rgba(10,125,75,.4);
  animation:pop .4s cubic-bezier(.2,1.3,.4,1) both;
}
@keyframes pop{from{transform:scale(.4);opacity:0}to{transform:scale(1);opacity:1}}
.success-box h2{margin:0 0 8px;font-size:22px;color:var(--ink)}
.success-box p{margin:0 0 18px;color:var(--muted);font-size:15px;line-height:1.5}
.btn-download{display:block;text-decoration:none;text-align:center}
.dl-link{margin:14px 0 0!important;font-size:12.5px}
.dl-link a{color:var(--brand);word-break:break-all}

@media(max-width:420px){
  .card{padding:22px 16px}
  .row2{grid-template-columns:1fr}
}