/* lumieremidtown.com : trang thông tin dự án (không phải web chính thức của CĐT)
   Hệ màu "đá và kính": nền sáng mát, một màu nhấn xanh kính, chữ than chì.
   Mọi màu khai ở :root; chế độ tối chỉ ghi đè token. */

:root {
  --nen: #f5f6f4;          /* Sương sáng: nền trang */
  --be-mat: #e7ebe9;       /* Đá mài: khối phụ, dải thông báo */
  --the: #ffffff;          /* Nền ô nhập, khối form */
  --chu: #1d2422;          /* Than chì: chữ chính */
  --chu-phu: #4f5a56;      /* Xám đá: chữ phụ, chú thích */
  --nhan: #2a5e65;         /* Kính xanh: màu nhấn duy nhất */
  --nhan-dam: #1f4a50;     /* nhấn khi rê chuột */
  --chu-tren-nhan: #ffffff;
  --vien: #c9d1ce;         /* Chỉ đá: đường kẻ trang trí */
  --vien-o: #6d7975;       /* Viền ô nhập, đạt >= 3:1 trên nền trắng */
  --loi: #9e3a2b;          /* Đỏ gạch: báo lỗi */
  --dat: #2f6b4f;          /* Xanh rêu: báo đã gửi */
  --nen-loi: #f8e9e6;
  --nen-dat: #e6f1eb;
  --bong: 0 1px 2px rgba(29, 36, 34, 0.06), 0 8px 24px rgba(29, 36, 34, 0.06);
  --rong: 1120px;
  --le: 16px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --nen: #121716;
    --be-mat: #1b2220;
    --the: #182019;
    --chu: #e5eae8;
    --chu-phu: #a7b2ae;
    --nhan: #86bcc2;
    --nhan-dam: #a6d0d5;
    --chu-tren-nhan: #0f1a1b;
    --vien: #2e3835;
    --vien-o: #82908b;
    --loi: #f0a194;
    --dat: #8fd0ab;
    --nen-loi: #3a2320;
    --nen-dat: #1d3327;
  }
}
:root[data-theme="dark"] {
  --nen: #121716;
  --be-mat: #1b2220;
  --the: #182019;
  --chu: #e5eae8;
  --chu-phu: #a7b2ae;
  --nhan: #86bcc2;
  --nhan-dam: #a6d0d5;
  --chu-tren-nhan: #0f1a1b;
  --vien: #2e3835;
  --vien-o: #82908b;
  --loi: #f0a194;
  --dat: #8fd0ab;
  --nen-loi: #3a2320;
  --nen-dat: #1d3327;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--nen);
  color: var(--chu);
  font-family: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  overflow-wrap: break-word;
}
img, svg { max-width: 100%; height: auto; }
figure { margin: 0; }
a { color: var(--nhan); text-underline-offset: 3px; }
a:hover { color: var(--nhan-dam); }
:focus-visible { outline: 3px solid var(--nhan); outline-offset: 2px; border-radius: 3px; }
[id] { scroll-margin-top: 84px; }
h1, h2, h3 { line-height: 1.25; font-weight: 600; letter-spacing: -0.01em; margin: 0 0 0.5em; }
h1 { font-size: clamp(28px, 4.6vw, 44px); font-weight: 500; }
h2 { font-size: clamp(24px, 3.2vw, 32px); font-weight: 500; }
h3 { font-size: 19px; }
p { margin: 0 0 1em; }
.khung { max-width: var(--rong); margin: 0 auto; padding: 0 var(--le); }
@media (min-width: 768px) { :root { --le: 24px; } }
.an-di { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.nho { font-size: 14px; color: var(--chu-phu); }
.nguon { font-size: 14px; color: var(--chu-phu); line-height: 1.55; }
.nguon a { color: var(--chu-phu); }

/* Dải thông báo đầu trang: luôn hiện, chữ đọc được */
.dai-thong-bao { background: var(--be-mat); color: var(--chu); font-size: 14px; line-height: 1.5; }
.dai-thong-bao p { margin: 0; padding: 8px 0; }

/* Đầu trang */
.dau-trang { position: sticky; top: 0; z-index: 20; background: var(--nen); border-bottom: 1px solid var(--vien); }
.dau-trang .khung { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 60px; }
.ten-trang { color: var(--chu); text-decoration: none; display: flex; flex-direction: column; line-height: 1.15; }
.ten-trang b { font-weight: 600; font-size: 18px; letter-spacing: 0.01em; }
.ten-trang span { font-size: 12.5px; color: var(--chu-phu); }
.dieu-huong { display: none; }
.dieu-huong a { color: var(--chu); text-decoration: none; font-size: 15px; padding: 8px 2px; }
.dieu-huong a:hover { color: var(--nhan); }
.muc-luc { position: relative; }
.muc-luc summary { list-style: none; cursor: pointer; padding: 10px 12px; border: 1px solid var(--vien-o); border-radius: 6px; font-size: 15px; min-height: 44px; display: flex; align-items: center; }
.muc-luc summary::-webkit-details-marker { display: none; }
.muc-luc[open] summary { background: var(--be-mat); }
.muc-luc nav { position: absolute; right: 0; top: calc(100% + 6px); background: var(--the); border: 1px solid var(--vien); border-radius: 8px; box-shadow: var(--bong); padding: 8px; min-width: 230px; display: flex; flex-direction: column; }
.muc-luc nav a { color: var(--chu); text-decoration: none; padding: 10px 12px; border-radius: 6px; }
.muc-luc nav a:hover { background: var(--be-mat); }
@media (min-width: 980px) {
  .dieu-huong { display: flex; gap: 20px; align-items: center; }
  .muc-luc { display: none; }
}

/* Nút */
.nut {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 12px 22px; border-radius: 6px; border: 1px solid var(--nhan);
  background: var(--nhan); color: var(--chu-tren-nhan); font: inherit; font-weight: 500; font-size: 16px;
  text-decoration: none; cursor: pointer; transition: background-color .15s ease;
}
.nut:hover { background: var(--nhan-dam); border-color: var(--nhan-dam); color: var(--chu-tren-nhan); }
.nut[disabled] { opacity: .65; cursor: progress; }
.nut-vien { background: transparent; color: var(--nhan); }
.nut-vien:hover { background: var(--be-mat); color: var(--nhan-dam); }
.dieu-huong .nut { min-height: 40px; padding: 8px 16px; font-size: 15px; color: var(--chu-tren-nhan); }
.dieu-huong .nut:hover { color: var(--chu-tren-nhan); }

/* Khối mở đầu: chữ trái, mặt cắt tòa tháp phải */
.mo-dau { padding: 40px 0 32px; }
.mo-dau .khung { display: grid; gap: 28px; align-items: center; }
.mo-dau .phu-de { font-size: 18px; color: var(--chu-phu); max-width: 34em; }
.mo-dau .hanh-dong { display: flex; flex-wrap: wrap; gap: 12px 20px; align-items: center; margin-top: 8px; }
.mo-dau figure { margin: 0; }
.mo-dau figcaption { margin-top: 8px; }
@media (min-width: 900px) {
  .mo-dau { padding: 64px 0 48px; }
  .mo-dau .khung { grid-template-columns: 7fr 5fr; gap: 48px; }
}
.mat-cat { width: 100%; max-width: 420px; display: block; margin: 0 auto; }
.mat-cat .net { stroke: var(--chu); fill: none; stroke-width: 1.4; }
.mat-cat .san { stroke: var(--vien); stroke-width: 0.8; }
.mat-cat .khoi-de { fill: var(--be-mat); stroke: var(--chu); stroke-width: 1.2; }
.mat-cat .ham { fill: var(--be-mat); stroke: var(--chu-phu); stroke-width: 1; stroke-dasharray: 3 3; }
.mat-cat .mat-dat { stroke: var(--chu); stroke-width: 2.2; }
.mat-cat .ngoac { stroke: var(--nhan); stroke-width: 1.2; fill: none; }
.mat-cat .nhan-tang5 { stroke: var(--nhan); stroke-width: 2.4; }
.mat-cat text { fill: var(--chu); font-family: inherit; font-size: 12.5px; }
.mat-cat .chu-phu { fill: var(--chu-phu); font-size: 11.5px; }
.mat-cat .ten-toa { font-weight: 600; font-size: 12px; }

/* Khối chung */
.khoi { padding: 56px 0; }
.khoi-phu { background: var(--be-mat); }
.khoi .dan-nhap { max-width: 44em; color: var(--chu-phu); font-size: 17.5px; }
@media (min-width: 900px) { .khoi { padding: 80px 0; } }

/* Tổng quan: văn + khung thông số kiểu khung tên bản vẽ */
.hai-cot { display: grid; gap: 32px; }
@media (min-width: 900px) { .hai-cot { grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; } }
.thong-so { border: 1.5px solid var(--chu); background: var(--the); }
.thong-so h3 { margin: 0; padding: 12px 16px; border-bottom: 1.5px solid var(--chu); font-size: 16px; font-weight: 600; }
.thong-so dl { margin: 0; }
.thong-so .dong { display: grid; grid-template-columns: 9.5em 1fr; gap: 12px; padding: 10px 16px; }
.thong-so .dong:nth-child(even) { background: var(--nen); }
.thong-so dt { color: var(--chu-phu); font-size: 15px; }
.thong-so dd { margin: 0; font-size: 15.5px; }
.thong-so .chan { padding: 10px 16px; border-top: 1px solid var(--vien); }
@media (max-width: 420px) { .thong-so .dong { grid-template-columns: 1fr; gap: 2px; } }

/* Vị trí */
.vi-tri { display: grid; gap: 32px; }
@media (min-width: 900px) { .vi-tri { grid-template-columns: 5fr 6fr; gap: 56px; align-items: start; } }
.so-do { width: 100%; max-width: 460px; display: block; }
.so-do .hop { fill: var(--the); stroke: var(--chu); stroke-width: 1.2; }
.so-do .hop-giua { fill: var(--nhan); stroke: var(--nhan); }
.so-do .noi { stroke: var(--chu-phu); stroke-width: 1.2; stroke-dasharray: 4 3; }
.so-do text { fill: var(--chu); font-family: inherit; font-size: 12.5px; }
.so-do .chu-giua { fill: var(--chu-tren-nhan); font-weight: 600; font-size: 14px; }
.so-do .chu-giua-phu { fill: var(--chu-tren-nhan); font-size: 12px; }
.so-do .chu-phu { fill: var(--chu-phu); font-size: 11.5px; }
.danh-sach-moc { list-style: none; margin: 0; padding: 0; display: grid; gap: 18px; }
.danh-sach-moc li { padding-left: 16px; border-left: 3px solid var(--nhan); }
.danh-sach-moc b { display: block; font-weight: 600; }

/* Sản phẩm: bảng */
.bang-cuon { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 0 0 12px; }
table.bang { border-collapse: collapse; width: 100%; min-width: 300px; background: var(--the); font-size: 15.5px; }
.bang caption { text-align: left; padding: 0 0 8px; color: var(--chu-phu); font-size: 14px; }
.bang th, .bang td { text-align: left; padding: 11px 14px; vertical-align: top; }
.bang thead th { border-bottom: 1.5px solid var(--chu); font-weight: 600; }
.bang tbody tr:nth-child(even) { background: var(--nen); }
.bang td.so { font-variant-numeric: tabular-nums; white-space: nowrap; }
.luoi-sp { display: grid; gap: 32px; }
@media (min-width: 900px) { .luoi-sp { grid-template-columns: 7fr 5fr; gap: 48px; } }
.ghi-chu-khung { border-left: 3px solid var(--nhan); padding: 4px 0 4px 16px; }

/* Tiện ích: hai cột danh sách + dải nhấn tầng 5 */
.dai-nhan { display: grid; gap: 8px; padding: 20px; background: var(--nhan); color: var(--chu-tren-nhan); border-radius: 4px; margin: 0 0 32px; }
.dai-nhan p { margin: 0; }
.dai-nhan .lon { font-size: 20px; font-weight: 500; }
@media (min-width: 900px) { .dai-nhan { grid-template-columns: 1fr 2fr; align-items: center; gap: 24px; padding: 24px 28px; } }
.tien-ich { display: grid; gap: 28px; }
@media (min-width: 760px) { .tien-ich { grid-template-columns: 1fr 1fr; gap: 48px; } }
.tien-ich ul { margin: 0; padding-left: 1.1em; columns: 1; }
.tien-ich li { margin: 0 0 6px; }
@media (min-width: 1100px) { .tien-ich ul.hai-cot-ds { columns: 2; column-gap: 32px; } }

/* Pháp lý & tiến độ: dòng thời gian dọc */
.dong-thoi-gian { list-style: none; margin: 0 0 32px; padding: 0; border-left: 1.5px solid var(--chu); }
.dong-thoi-gian li { position: relative; padding: 0 0 24px 22px; }
.dong-thoi-gian li::before { content: ""; position: absolute; left: -6px; top: 8px; width: 10px; height: 10px; background: var(--nen); border: 1.5px solid var(--chu); }
.dong-thoi-gian li.du-kien::before { background: var(--nhan); border-color: var(--nhan); }
.dong-thoi-gian .ngay { display: block; font-weight: 600; font-variant-numeric: tabular-nums; }
.chua-co { background: var(--the); border: 1px dashed var(--vien-o); padding: 20px; border-radius: 4px; }
.chua-co h3 { margin-top: 0; }
.chua-co ul { margin: 0 0 12px; padding-left: 1.1em; }

/* Hỏi đáp */
.hoi-dap { max-width: 50em; }
.hoi-dap details { border-bottom: 1px solid var(--vien); }
.hoi-dap summary { cursor: pointer; padding: 16px 32px 16px 0; font-weight: 500; position: relative; list-style: none; }
.hoi-dap summary::-webkit-details-marker { display: none; }
.hoi-dap summary::after { content: "+"; position: absolute; right: 4px; top: 12px; font-size: 22px; color: var(--nhan); }
.hoi-dap details[open] summary::after { content: "−"; }
.hoi-dap .tra-loi { padding: 0 0 16px; color: var(--chu); }

/* Form */
.khoi-form { display: grid; gap: 32px; }
@media (min-width: 900px) { .khoi-form { grid-template-columns: 5fr 6fr; gap: 56px; align-items: start; } }
.the-form { background: var(--the); border: 1px solid var(--vien); border-radius: 6px; padding: 20px; box-shadow: var(--bong); }
@media (min-width: 600px) { .the-form { padding: 28px; } }
.truong { margin: 0 0 16px; }
.truong label { display: block; font-weight: 500; font-size: 15.5px; margin: 0 0 6px; }
.truong .goi-y { font-weight: 400; color: var(--chu-phu); font-size: 14px; }
.truong input, .truong select {
  width: 100%; min-height: 48px; padding: 10px 12px; font: inherit; font-size: 16px; color: var(--chu);
  background: var(--the); border: 1.5px solid var(--vien-o); border-radius: 6px;
}
.truong input:focus, .truong select:focus { outline: 3px solid var(--nhan); outline-offset: 1px; border-color: var(--nhan); }
.o-dong-y { display: grid; grid-template-columns: 24px 1fr; gap: 10px; align-items: start; margin: 0 0 12px; font-size: 15px; line-height: 1.55; cursor: pointer; }
.o-dong-y input { width: 22px; height: 22px; margin: 2px 0 0; accent-color: var(--nhan); }
.bay { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.bao-loi { background: var(--nen-loi); color: var(--chu); border: 1.5px solid var(--loi); border-radius: 6px; padding: 12px 14px; margin: 0 0 14px; font-size: 15px; }
.da-gui { background: var(--nen-dat); border: 1.5px solid var(--dat); border-radius: 6px; padding: 20px; }
.da-gui h3 { margin-top: 0; }
.the-form .nut { width: 100%; }

/* Chân trang */
.chan-trang { background: var(--be-mat); padding: 40px 0 32px; font-size: 15px; }
.chan-trang .luoi { display: grid; gap: 28px; }
@media (min-width: 900px) { .chan-trang .luoi { grid-template-columns: 2fr 1fr; gap: 56px; } }
.chan-trang h2 { font-size: 17px; font-weight: 600; margin: 0 0 8px; }
.chan-trang ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.chan-trang a { color: var(--chu); display: inline-block; padding: 4px 0; }
.chan-trang .ban-quyen { margin-top: 24px; padding-top: 16px; border-top: 1px solid var(--vien); color: var(--chu-phu); font-size: 14px; }

/* Trang bài viết, trang phụ */
.duong-dan { font-size: 14px; color: var(--chu-phu); padding: 20px 0 0; }
.duong-dan a { color: var(--chu-phu); }
.bai { padding: 24px 0 56px; }
.bai .than { max-width: 44em; }
.bai .than h2 { font-size: 24px; margin-top: 1.6em; }
.bai .than h3 { margin-top: 1.4em; }
.bai .than ul, .bai .than ol { padding-left: 1.2em; }
.bai .than li { margin-bottom: 0.4em; }
.bai .dong-meta { color: var(--chu-phu); font-size: 15px; margin-bottom: 24px; }
.bai .mien-tru { background: var(--be-mat); padding: 14px 16px; border-radius: 4px; font-size: 15px; margin: 24px 0; }
.bai .ds-nguon { font-size: 14.5px; color: var(--chu-phu); }
.bai .ds-nguon li { margin-bottom: 6px; }
.bai .ds-nguon a { color: var(--chu-phu); word-break: break-all; }
.goi-hanh-dong { border: 1.5px solid var(--chu); padding: 20px; margin: 32px 0; max-width: 44em; background: var(--the); }
.goi-hanh-dong p { margin-bottom: 12px; }
.ds-bai { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; max-width: 50em; }
.ds-bai li { padding: 22px 0; border-bottom: 1px solid var(--vien); }
.ds-bai h2 { font-size: 21px; margin-bottom: 6px; }
.ds-bai h2 a { color: var(--chu); text-decoration: none; }
.ds-bai h2 a:hover { color: var(--nhan); text-decoration: underline; }
.ds-bai p { margin: 0; color: var(--chu-phu); }
.bang-phien-ban td, .bang-phien-ban th { font-size: 14.5px; }

/* Hộp đồng ý cookie (lớp 1, đáy mọi trang). Hai nút ngang hàng: cùng cỡ, cùng kiểu, cùng độ nổi. */
.hop-cookie { position: fixed; left: 0; right: 0; bottom: 0; z-index: 40; background: var(--the); color: var(--chu); border-top: 1.5px solid var(--chu); box-shadow: 0 -8px 24px rgba(29, 36, 34, 0.12); }
.hop-cookie[hidden] { display: none; }
.hop-cookie .khung { display: grid; gap: 12px; padding-top: 14px; padding-bottom: 14px; }
.hop-cookie p { margin: 0; font-size: 14px; line-height: 1.5; }
@media (min-width: 600px) { .hop-cookie p { font-size: 14.5px; line-height: 1.55; } }
.hop-cookie .hai-nut { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.nut-cookie { min-height: 46px; padding: 10px 16px; border: 1.5px solid var(--chu); border-radius: 6px; background: var(--the); color: var(--chu); font: inherit; font-size: 15.5px; font-weight: 500; cursor: pointer; }
.nut-cookie:hover { background: var(--be-mat); }
@media (min-width: 900px) {
  .hop-cookie .khung { grid-template-columns: 1fr auto; align-items: center; gap: 24px; }
  .hop-cookie .hai-nut { grid-template-columns: 140px 140px; }
}
.lien-ket-nut { background: none; border: 0; padding: 4px 0; font: inherit; color: var(--chu); text-decoration: underline; text-underline-offset: 3px; cursor: pointer; }