.bang-tren {
  padding: 48px 16px 96px; text-align: center; color: #fff;
  background:
    radial-gradient(ellipse at 85% -20%, rgba(245, 201, 51, .45), transparent 55%),
    radial-gradient(ellipse at 0% 120%, rgba(210, 58, 44, .55), transparent 55%),
    linear-gradient(135deg, var(--xanh-dam), var(--xanh));
}
.bang-tren h1 { margin: 0; font-size: clamp(1.6rem, 4vw, 2.4rem); font-weight: 800; letter-spacing: -.02em; }
.bang-tren p { margin: 8px auto 0; max-width: 520px; color: rgba(255, 255, 255, .88); }

.khung { width: min(860px, 100% - 32px); margin: -64px auto 48px; position: relative; }
.the { background: var(--the); border-radius: 20px; box-shadow: var(--bong); border: 1px solid var(--vien); }
#bieuMau { padding: clamp(20px, 4vw, 36px); }

.buoc + .buoc { margin-top: 28px; padding-top: 28px; border-top: 1px solid var(--vien); }
.buoc__dau { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.buoc__dau h2 { margin: 0; font-size: 1.125rem; }
.buoc__so {
  display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; flex: none;
  background: color-mix(in srgb, var(--do) 12%, transparent); color: var(--do); font-weight: 700; font-size: .9rem;
}
em { color: var(--do); font-style: normal; }

/* Lưới 31 khu phố: chạm một lần là chọn, không phải cuộn trong ô select. */
.luoi-kp { display: grid; grid-template-columns: repeat(auto-fill, minmax(112px, 1fr)); gap: 8px; }
.chip { position: relative; }
.chip input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.chip span {
  display: flex; align-items: center; justify-content: center; min-height: 48px; padding: 8px 10px; border-radius: 10px;
  border: 1.5px solid var(--vien); background: #fff; font-weight: 600; font-size: .9rem; text-align: center; line-height: 1.25;
  transition: border-color .15s, background-color .15s, color .15s, transform .1s var(--em);
}
.chip:hover span { border-color: #bcc7d4; }
.chip input:active + span { transform: scale(.96); }
.chip input:checked + span { border-color: var(--do); background: color-mix(in srgb, var(--do) 8%, #fff); color: var(--do-dam); box-shadow: inset 0 0 0 1px var(--do); }

.hang-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.o { display: block; margin-bottom: 14px; }
.o > span { display: block; margin-bottom: 6px; font-weight: 600; font-size: .9rem; }
.o small { color: var(--muc-3); font-weight: 400; }
.o input {
  width: 100%; min-height: 48px; padding: .7rem .9rem; border-radius: 10px; border: 1.5px solid var(--vien); background: #fff;
  transition: border-color .15s;
}
.o input:hover { border-color: #bcc7d4; }
.o input:focus { border-color: var(--xanh); outline: none; box-shadow: 0 0 0 4px color-mix(in srgb, var(--xanh) 18%, transparent); }
.o input[aria-invalid="true"] { border-color: var(--do); }
.loi-o { margin: 8px 0 0; color: var(--do-dam); font-size: .875rem; font-weight: 500; }

.vung-tha {
  position: relative; display: flex; flex-direction: column; align-items: center; gap: 6px; padding: 32px 16px;
  border: 2px dashed #c8d3e0; border-radius: 16px; background: #f8fafd; text-align: center; cursor: pointer;
  transition: border-color .15s, background-color .15s;
}
.vung-tha:hover, .vung-tha.keo { border-color: var(--xanh); background: color-mix(in srgb, var(--xanh) 6%, #fff); }
.vung-tha input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.vung-tha:focus-within { outline: 3px solid color-mix(in srgb, var(--xanh) 45%, transparent); outline-offset: 2px; }
.vung-tha svg { width: 48px; height: 48px; fill: none; stroke: var(--xanh); stroke-width: 2.4; stroke-linejoin: round; margin-bottom: 4px; }
.vung-tha u { color: var(--xanh-dam); text-underline-offset: 3px; }
.vung-tha small { color: var(--muc-3); }

.luoi-xem { list-style: none; margin: 16px 0 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 10px; }
.luoi-xem:empty { display: none; }
.luoi-xem li { position: relative; aspect-ratio: 1; border-radius: 12px; overflow: hidden; background: #e9eef5; animation: hien-ra .3s var(--em) both; }
@keyframes hien-ra { from { opacity: 0; transform: scale(.94); } }
.luoi-xem img { width: 100%; height: 100%; object-fit: cover; }
.luoi-xem .ten {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 18px 8px 6px; font-size: .7rem; color: #fff;
  background: linear-gradient(transparent, rgba(0, 0, 0, .65)); white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.luoi-xem button {
  position: absolute; top: 6px; right: 6px; width: 30px; height: 30px; border-radius: 50%; border: 0;
  background: rgba(20, 32, 47, .7); color: #fff; cursor: pointer; display: grid; place-items: center; font-size: 18px; line-height: 1;
}
.luoi-xem button:hover { background: var(--do); }

.chan-form { margin-top: 28px; display: flex; flex-direction: column; gap: 12px; }
.nut--lon { min-height: 54px; font-size: 1.05rem; border-radius: 12px; }
.tien-trinh { height: 6px; border-radius: 99px; background: var(--vien); overflow: hidden; }
.tien-trinh i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--do), var(--vang)); transition: width .2s; }

.thanh-cong { padding: 48px 24px; text-align: center; animation: hien-ra .4s var(--em) both; }
.thanh-cong h2 { margin: 16px 0 4px; font-size: 1.5rem; }
.thanh-cong p { margin: 0 auto 24px; color: var(--muc-2); max-width: 460px; }
.dau-tich { width: 72px; height: 72px; margin: 0 auto; border-radius: 50%; display: grid; place-items: center; background: color-mix(in srgb, var(--xanh-la) 14%, #fff); }
.dau-tich svg { width: 38px; height: 38px; fill: none; stroke: var(--xanh-la); stroke-width: 2.6; stroke-linecap: round; stroke-linejoin: round; }
.nhom-nut { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }

@media (max-width: 560px) {
  .hang-2 { grid-template-columns: 1fr; gap: 0; }
  .luoi-kp { grid-template-columns: repeat(3, 1fr); }
  .chip span { font-size: .82rem; }
  .dau-trang small { display: none; }
}

/* Ô thả xuống chọn khu phố (thay lưới 31 nút) */
.chon-kp { position: relative; max-width: 420px; }
.chon-kp select {
  width: 100%; min-height: 52px; padding: .75rem 2.8rem .75rem 1rem; border-radius: 12px; border: 1.5px solid var(--vien);
  background: #fff; font-size: 1rem; font-weight: 600; cursor: pointer; appearance: none; -webkit-appearance: none;
  transition: border-color .15s, box-shadow .15s;
}
.chon-kp select:hover { border-color: #bcc7d4; }
.chon-kp select:focus { border-color: var(--xanh); outline: none; box-shadow: 0 0 0 4px color-mix(in srgb, var(--xanh) 18%, transparent); }
.chon-kp select:invalid { color: var(--muc-3); font-weight: 500; }
.chon-kp select option { color: var(--muc); font-weight: 500; }
.chon-kp select[aria-invalid="true"] { border-color: var(--do); }
.chon-kp svg {
  position: absolute; right: 14px; top: 50%; width: 20px; height: 20px; transform: translateY(-50%); pointer-events: none;
  fill: none; stroke: var(--muc-2); stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round;
}
@media (max-width: 560px) { .chon-kp { max-width: none; } }