/* Nhận diện ITViet (theo itviet-webmail): mực navy, chấm tím, nền giấy kem, Noto Serif cho tiêu đề.
   Bố cục: hồ sơ giấy một cột, mục lục dính bên trái trên màn rộng. */

@font-face {
  font-family: "Noto Serif";
  font-weight: 600 700;
  font-display: swap;
  src: url("/brand/fonts/noto-serif-vietnamese.woff2") format("woff2");
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301,
    U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}
@font-face {
  font-family: "Noto Serif";
  font-weight: 600 700;
  font-display: swap;
  src: url("/brand/fonts/noto-serif-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329,
    U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "Noto Serif";
  font-weight: 600 700;
  font-display: swap;
  src: url("/brand/fonts/noto-serif-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329,
    U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  --giay: #f6f2ea;
  --giay-2: #fffdf9;
  --giay-3: #efe9dc;
  --muc: #0b1a30;
  --muc-2: #5e6676;
  --ke: #e7e0d2;
  --tim: #6b3aef;
  --tim-nhat: rgb(107 58 239 / 0.1);
  --tren-tim: #ffffff;
  --loi: #a9442f;
  --dat: #2f7a4f;
  --font-tieu-de: "Noto Serif", Georgia, "Times New Roman", serif;
  --font-than: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, system-ui, sans-serif;
  --bo-goc: 10px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --giay: #0a1322;
    --giay-2: #121c2f;
    --giay-3: #1a2540;
    --muc: #edeff5;
    --muc-2: #9aa3b6;
    --ke: #24304a;
    --tim: #8f6bff;
    --tim-nhat: rgb(143 107 255 / 0.16);
    --tren-tim: #0a1322;
    --loi: #e58a72;
    --dat: #6fcf97;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--giay);
  color: var(--muc);
  font: 16px/1.6 var(--font-than);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--tim); outline-offset: 2px; }

.khung {
  max-width: 1120px;
  margin: 0 auto;
  padding-left: max(20px, env(safe-area-inset-left, 0px));
  padding-right: max(20px, env(safe-area-inset-right, 0px));
}
.nhan-nho {
  margin: 0;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muc-2);
}

.dau-trang { border-bottom: 1px solid var(--ke); background: var(--giay-2); }
.dau-trang__trong { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 18px; flex-wrap: wrap; }
.logo img { display: block; height: 40px; width: auto; }
/* itviet-logo.png không có kênh trong suốt; multiply làm nền trắng của ảnh hòa vào nền kem. */
.logo--sang { mix-blend-mode: multiply; }
.logo--toi { display: none !important; }
@media (prefers-color-scheme: dark) {
  .logo--sang { display: none !important; }
  .logo--toi { display: block !important; }
}
.dau-trang__nhan { margin: 0; font-size: 13px; color: var(--muc-2); font-variant-numeric: tabular-nums; }

.mo-dau { padding-block: 56px 40px; max-width: 760px; }
.mo-dau h1 {
  margin: 10px 0 16px;
  font: 700 clamp(30px, 5vw, 46px)/1.15 var(--font-tieu-de);
  letter-spacing: -0.01em;
  text-wrap: balance;
}
.mo-dau__loi { margin: 0; font-size: 17px; color: var(--muc-2); max-width: 64ch; }
.the-thong-tin {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1px;
  margin: 32px 0 0;
  background: var(--ke);
  border: 1px solid var(--ke);
  border-radius: var(--bo-goc);
  overflow: hidden;
}
.the-thong-tin div { background: var(--giay-2); padding: 14px 16px; min-width: 0; }
.the-thong-tin dt { font-size: 12px; color: var(--muc-2); }
.the-thong-tin dd { margin: 2px 0 0; font-weight: 600; overflow-wrap: anywhere; }

.mo-dau__lien-ket { margin: 16px 0 0; }
.mo-dau__lien-ket a { color: var(--tim); font-weight: 600; text-decoration: none; }
.mo-dau__lien-ket a:hover { text-decoration: underline; }

.bo-cuc { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 48px; padding-bottom: 80px; }
.muc-luc { position: sticky; top: 24px; align-self: start; }
.muc-luc ol { list-style: none; margin: 12px 0 20px; padding: 0; display: grid; gap: 2px; }
.muc-luc a {
  display: flex; justify-content: space-between; gap: 8px;
  padding: 7px 10px; border-radius: 6px;
  color: var(--muc-2); text-decoration: none; font-size: 14px;
}
.muc-luc a:hover { background: var(--giay-3); color: var(--muc); }
.muc-luc a.xong { color: var(--muc); }
.muc-luc a.xong::after { content: "✓"; color: var(--tim); font-weight: 700; }
.tien-do { height: 4px; border-radius: 2px; background: var(--ke); overflow: hidden; }
.tien-do span { display: block; height: 100%; width: 0; background: var(--tim); transition: width 0.3s ease; }
.tien-do__chu { margin: 8px 0 0; font-size: 13px; color: var(--muc-2); font-variant-numeric: tabular-nums; }

form { display: grid; gap: 28px; min-width: 0; }
.phan {
  margin: 0;
  padding: 28px 28px 32px;
  background: var(--giay-2);
  border: 1px solid var(--ke);
  border-radius: var(--bo-goc);
  min-width: 0;
  scroll-margin-top: 24px;
}
.phan legend {
  float: left; width: 100%;
  display: flex; align-items: baseline; gap: 14px;
  padding: 0; margin-bottom: 6px;
  font: 700 22px/1.3 var(--font-tieu-de);
}
.phan legend + * { clear: both; }
.phan__so { font: 600 14px var(--font-than); color: var(--tim); font-variant-numeric: tabular-nums; }
.phan__mo-ta { margin: 0 0 24px; color: var(--muc-2); max-width: 64ch; }

.luoi { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 22px 20px; }
.cau { grid-column: span 3; display: grid; gap: 8px; min-width: 0; }
.cau--nho { grid-column: span 2; }
.cau--rong { grid-column: 1 / -1; }
.cau__nhan { font-weight: 600; font-size: 15px; }
.cau__nhan .bat-buoc { color: var(--tim); margin-left: 2px; }

input[type="text"], input[type="email"], input[type="tel"], input[type="number"], textarea {
  width: 100%;
  padding: 11px 13px;
  font: inherit;
  color: var(--muc);
  background: var(--giay);
  border: 1px solid var(--ke);
  border-radius: 8px;
  transition: border-color 0.15s, box-shadow 0.15s;
}
textarea { min-height: 96px; resize: vertical; }
input::placeholder, textarea::placeholder { color: var(--muc-2); opacity: 0.7; }
input:focus, textarea:focus { outline: none; border-color: var(--tim); box-shadow: 0 0 0 3px var(--tim-nhat); }
.cau--loi input, .cau--loi textarea { border-color: var(--loi); }
.cau__loi { margin: 0; font-size: 13px; color: var(--loi); }

.chip-nhom { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { position: relative; }
.chip input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.chip span {
  display: inline-block;
  padding: 7px 13px;
  font-size: 14px;
  border: 1px solid var(--ke);
  border-radius: 999px;
  background: var(--giay);
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.chip input:hover + span { border-color: var(--muc-2); }
.chip input:checked + span { background: var(--tim); border-color: var(--tim); color: var(--tren-tim); }
.chip input:focus-visible + span { outline: 2px solid var(--tim); outline-offset: 2px; }
.o-khac { margin-top: 2px; }

.danh-sach-goi-y { margin: 0 0 20px; padding-left: 20px; color: var(--muc-2); display: grid; gap: 4px; }
.vung-tha {
  display: grid; justify-items: center; gap: 4px;
  padding: 28px 16px;
  text-align: center;
  border: 1.5px dashed var(--ke);
  border-radius: var(--bo-goc);
  background: var(--giay);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.vung-tha:hover, .vung-tha.dang-keo { border-color: var(--tim); background: var(--tim-nhat); }
.vung-tha input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.vung-tha strong { color: var(--tim); }
.vung-tha small { color: var(--muc-2); font-size: 13px; }
.danh-sach-tep { list-style: none; margin: 12px 0 0; padding: 0; display: grid; gap: 6px; }
.danh-sach-tep li {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 8px 12px; border: 1px solid var(--ke); border-radius: 8px; font-size: 14px;
}
.danh-sach-tep .ten { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.danh-sach-tep .co { color: var(--muc-2); font-variant-numeric: tabular-nums; flex: none; }
.danh-sach-tep button { flex: none; border: 0; background: none; color: var(--loi); font: inherit; cursor: pointer; }

.o-bay { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.thanh-gui { display: grid; gap: 18px; padding: 24px 28px; border-radius: var(--bo-goc); background: var(--giay-3); }
.dong-y { display: flex; gap: 12px; align-items: flex-start; font-size: 14px; color: var(--muc-2); cursor: pointer; }
.dong-y input { margin-top: 4px; accent-color: var(--tim); width: 18px; height: 18px; flex: none; }
.thanh-gui__hang { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.nut-gui {
  padding: 13px 26px;
  font: 600 16px var(--font-than);
  color: var(--tren-tim);
  background: var(--tim);
  border: 0;
  border-radius: 8px;
  cursor: pointer;
  transition: filter 0.15s, transform 0.1s;
}
.nut-gui:hover { filter: brightness(1.08); }
.nut-gui:active { transform: translateY(1px); }
.nut-gui:disabled { opacity: 0.6; cursor: progress; }
.thong-bao { margin: 0; font-size: 14px; min-width: 0; }
.thong-bao.loi { color: var(--loi); }

.da-gui {
  max-width: 560px; margin: 0 auto 96px; padding: 40px 32px;
  text-align: center; background: var(--giay-2);
  border: 1px solid var(--ke); border-radius: var(--bo-goc);
}
.da-gui h2 { margin: 16px 0 8px; font: 700 28px var(--font-tieu-de); }
.da-gui p { margin: 0; color: var(--muc-2); }
.da-gui strong { color: var(--muc); font-variant-numeric: tabular-nums; }

.chan-trang { border-top: 1px solid var(--ke); }
.chan-trang__trong { display: flex; justify-content: space-between; gap: 8px 24px; flex-wrap: wrap; padding-block: 24px; font-size: 13px; color: var(--muc-2); }
.chan-trang p { margin: 0; }

@media (max-width: 880px) {
  .bo-cuc { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .muc-luc { position: static; }
  .muc-luc ol { display: flex; flex-wrap: wrap; gap: 6px; }
  .muc-luc a { border: 1px solid var(--ke); }
}
@media (max-width: 600px) {
  .mo-dau { padding-block: 32px 24px; }
  .phan, .thanh-gui { padding: 22px 18px; }
  .cau, .cau--nho { grid-column: 1 / -1; }
  .luoi { grid-template-columns: minmax(0, 1fr); }
  .muc-luc ol, .muc-luc .nhan-nho { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}

.bang-cuon { overflow-x: auto; border: 1px solid var(--ke); border-radius: 8px; }
.bang-so { width: 100%; border-collapse: collapse; font-size: 14px; }
.bang-so th, .bang-so td { padding: 8px 10px; border-bottom: 1px solid var(--ke); text-align: center; }
.bang-so thead th { font-size: 12px; font-weight: 600; color: var(--muc-2); background: var(--giay-3); }
.bang-so tbody th { text-align: left; font-weight: 600; white-space: nowrap; }
.bang-so tbody tr:last-child th, .bang-so tbody tr:last-child td { border-bottom: 0; }
.bang-so input { width: 64px; padding: 7px 8px; text-align: center; font-variant-numeric: tabular-nums; }
.bang-so--tien input { width: 130px; text-align: right; }
.cau__goi-y { margin: 0; font-size: 13px; color: var(--muc-2); }
.chip-hang {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px 6px 7px;
  font: inherit; font-size: 14px; color: var(--muc); background: var(--giay);
  border: 1px solid var(--ke); border-radius: 999px; cursor: pointer;
}
.chip-hang:hover { border-color: var(--muc-2); }
.chip-hang__so { width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center; border: 1px dashed var(--ke); font-size: 12px; font-weight: 700; font-variant-numeric: tabular-nums; }
.chip-hang[aria-pressed="true"] { border-color: var(--tim); background: var(--tim-nhat); }
.chip-hang[aria-pressed="true"] .chip-hang__so { color: var(--tren-tim); background: var(--tim); border: 0; }