:root {
  --nen: #f6f1ea;
  --the: #fffdf9;
  --chu: #231b14;
  --chu-phu: #6b5a4b;
  --vien: #e1d6c8;
  --nhan: #b4491f;
  --nhan-chu: #ffffff;
  --sang: #efe3d1;
  --canh-bao: #8a3b00;
  --canh-bao-nen: #fde8d0;
  --xanh: #2f6b4f;
  --xanh-nen: #dff0e6;
  --do: #9c2a2a;
  --do-nen: #fbe0e0;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --nen: #1c1612;
    --the: #2a211a;
    --chu: #f3e9dc;
    --chu-phu: #bba891;
    --vien: #443628;
    --nhan: #e2793f;
    --nhan-chu: #1c1612;
    --sang: #382b1f;
    --canh-bao: #ffc58a;
    --canh-bao-nen: #4a3018;
    --xanh: #9bdcb8;
    --xanh-nen: #1f3a2d;
    --do: #ffb4b4;
    --do-nen: #4a2121;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--nen);
  color: var(--chu);
  font: 17px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  padding: 0 16px calc(84px + env(safe-area-inset-bottom));
}

.dau, main { max-width: 720px; margin: 0 auto; }

.dau { padding: 22px 0 6px; }
h1 { font-size: 1.55rem; margin: 0; letter-spacing: -0.01em; }
.phu { margin: 4px 0 0; color: var(--chu-phu); font-size: 0.95rem; }
h2 { font-size: 1.05rem; margin: 0 0 10px; }
h3 { font-size: 1rem; margin: 0 0 6px; }

.khoi { margin: 18px 0; }

.luoi { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; }
.luoi.hai { grid-template-columns: 1fr 1fr; }

.chon {
  appearance: none;
  border: 1.5px solid var(--vien);
  background: var(--the);
  color: var(--chu);
  border-radius: 12px;
  padding: 12px 12px;
  min-height: 52px;
  text-align: left;
  font: inherit;
  line-height: 1.3;
  cursor: pointer;
}
.chon[aria-checked="true"] { border-color: var(--nhan); background: var(--sang); box-shadow: inset 0 0 0 1px var(--nhan); font-weight: 600; }
.chon:focus-visible, .nut:focus-visible, .duoi button:focus-visible, select:focus-visible, summary:focus-visible {
  outline: 3px solid var(--nhan);
  outline-offset: 2px;
}

.the {
  background: var(--the);
  border: 1px solid var(--vien);
  border-radius: 14px;
  padding: 14px 16px;
  margin: 12px 0;
}
.the.sang { background: var(--sang); }
.nhan { color: var(--chu-phu); font-size: 0.85rem; margin: 0 0 4px; text-transform: uppercase; letter-spacing: 0.04em; }
.to { font-size: 1.35rem; font-weight: 700; margin: 0; line-height: 1.25; }
.t { margin: 6px 0; }
.nho { color: var(--chu-phu); font-size: 0.9rem; }

.thanhphan { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 10px 0 6px; }
.thanhphan div { background: var(--nen); border-radius: 10px; padding: 8px 10px; text-align: center; }
.thanhphan .gt { display: block; font-size: 1.4rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.thanhphan .tn { font-size: 0.8rem; color: var(--chu-phu); }

.bao { border-radius: 10px; padding: 10px 12px; margin: 10px 0; font-size: 0.95rem; }
.bao.cb { background: var(--canh-bao-nen); color: var(--canh-bao); }
.bao.ok { background: var(--xanh-nen); color: var(--xanh); }
.bao.do { background: var(--do-nen); color: var(--do); }

ul.meo { margin: 6px 0 0; padding-left: 20px; }
ul.meo li { margin: 4px 0; }
ol.buoc { padding-left: 22px; }
ol.buoc li { margin: 6px 0; }

details { margin-top: 8px; }
summary { cursor: pointer; font-weight: 600; padding: 6px 0; color: var(--nhan); }
table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
td, th { padding: 6px 4px; border-bottom: 1px solid var(--vien); text-align: left; vertical-align: top; }
th { color: var(--chu-phu); font-weight: 600; }
td:last-child { text-align: right; font-variant-numeric: tabular-nums; }
.bang-tuongduong td:first-child { text-align: left; }
.bang-tuongduong td:last-child { text-align: right; }

.o-nhap { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin: 10px 0; }
.o-nhap label { display: grid; gap: 4px; font-size: 0.85rem; color: var(--chu-phu); }
select {
  font: inherit;
  font-size: 1.05rem;
  padding: 10px 8px;
  border-radius: 10px;
  border: 1.5px solid var(--vien);
  background: var(--the);
  color: var(--chu);
  min-height: 48px;
  width: 100%;
}

.hang { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.nut {
  appearance: none;
  border: 1.5px solid var(--vien);
  background: var(--the);
  color: var(--chu);
  font: inherit;
  font-weight: 600;
  border-radius: 12px;
  padding: 12px 14px;
  min-height: 48px;
  cursor: pointer;
}
.nut.chinh { background: var(--nhan); color: var(--nhan-chu); border-color: var(--nhan); }

.duoi {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: var(--the);
  border-top: 1px solid var(--vien);
  padding: 6px 8px calc(6px + env(safe-area-inset-bottom));
  gap: 4px;
}
.duoi button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--chu-phu);
  font: inherit;
  font-size: 0.92rem;
  padding: 12px 4px;
  min-height: 48px;
  border-radius: 10px;
  cursor: pointer;
}
.duoi button.dang { background: var(--sang); color: var(--nhan); font-weight: 700; }

[hidden] { display: none !important; }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }

.duoi button { font-size: 0.82rem; padding: 12px 2px; }
.duoi { grid-template-columns: repeat(5, 1fr); }

.o-nhap.hai { grid-template-columns: 1fr 1fr; }
.o-nhap.mot { grid-template-columns: 1fr; }
input[type="password"], input[type="file"], textarea {
  font: inherit;
  font-size: 1.05rem;
  padding: 10px 8px;
  border-radius: 10px;
  border: 1.5px solid var(--vien);
  background: var(--the);
  color: var(--chu);
  width: 100%;
}
.nhap-dai { display: grid; gap: 4px; margin: 10px 0; font-size: 0.85rem; color: var(--chu-phu); }

.muc { display: grid; grid-template-columns: 96px 1fr; gap: 12px; }
.muc:not(:has(img)) { grid-template-columns: 1fr; }
.anh { width: 96px; height: 96px; object-fit: cover; border-radius: 10px; background: var(--sang); }
.anh.lon { width: 100%; height: auto; max-height: 320px; object-fit: contain; margin: 8px 0; }
.muc h3 { margin: 0 0 4px; }
.sao { margin: 2px 0; color: var(--nhan); letter-spacing: 0.1em; }
.sao-chon .chon { min-width: 52px; text-align: center; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1.5px solid var(--vien); background: var(--the);
  border-radius: 999px; padding: 8px 12px; min-height: 44px; font-size: 0.95rem;
}
.chip input { width: 18px; height: 18px; accent-color: var(--nhan); }
body { -webkit-tap-highlight-color: transparent; }
@media (display-mode: standalone) { .dau { padding-top: calc(22px + env(safe-area-inset-top)); } }

.an { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.gui-ds { list-style: none; padding: 0; margin: 10px 0; }
.gui-ds li { display: flex; flex-wrap: wrap; gap: 6px; padding: 6px 0; border-bottom: 1px solid var(--vien); font-size: 0.95rem; }
.gui-ten { overflow-wrap: anywhere; }
.gui-loi b { color: var(--do); }
.gui-xong b { color: var(--xanh); }