:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --ink: #15181d;
  --muted: #6b7280;
  --line: #e3e6ea;
  --accent: #1f6feb;
  --accent-ink: #ffffff;
  --warn: #8a5300;
  --warn-bg: #fff6e0;
  --badge-bg: #eef2f7;
  --radius: 12px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1216; --card: #171b21; --ink: #e8eaed; --muted: #9aa3ad;
    --line: #262c34; --accent: #4f8bf0; --warn: #ffd79a; --warn-bg: #2d2411;
    --badge-bg: #222831;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); }
/* không ảnh nào được tràn ra ngoài khung chứa nó */
img { max-width: 100%; height: auto; }
main { padding: 16px; max-width: 760px; margin: 0 auto; }
h1 { font-size: 1.35rem; margin: 4px 0 8px; }
h2 { font-size: 1.05rem; margin: 22px 0 10px; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.crumb { margin: 0 0 8px; font-size: .9rem; }

/* top bar */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; padding: 12px 16px; background: var(--card);
  border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 20;
}
.topbar .brand {
  font-weight: 700; text-decoration: none; color: var(--ink); white-space: nowrap;
}
.topbar nav { display: flex; gap: 12px; font-size: .85rem; white-space: nowrap; }
@media (max-width: 420px) {
  .topbar { gap: 8px; padding: 11px 12px; }
  .topbar nav { gap: 9px; font-size: .78rem; }
}

/* search */
.searchbox { display: flex; gap: 8px; position: relative; margin: 12px 0 4px; }
.searchbox input {
  flex: 1; min-width: 0; padding: 13px 14px; font-size: 1.05rem;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--card); color: var(--ink);
}
.searchbox button {
  padding: 13px 18px; font-size: 1rem; font-weight: 600; border: 0;
  border-radius: var(--radius); background: var(--accent); color: var(--accent-ink);
}
.suggest {
  position: absolute; top: 100%; left: 0; right: 0; margin: 4px 0 0; padding: 0;
  list-style: none; background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: 0 8px 24px rgba(0,0,0,.12);
  max-height: 54vh; overflow: auto; z-index: 30;
}
.suggest li { padding: 12px 14px; border-top: 1px solid var(--line); cursor: pointer; }
.suggest li:first-child { border-top: 0; }
.suggest li[aria-selected="true"] { background: var(--badge-bg); }

/* brands */
.brandgrid { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px; padding: 9px 12px;
  background: var(--card); border: 1px solid var(--line); border-radius: 999px;
  text-decoration: none; color: var(--ink); font-size: .9rem;
}
.chip span { color: var(--muted); font-size: .8rem; }

/* model list */
.modellist { list-style: none; padding: 0; margin: 0; }
.modellist li { border-bottom: 1px solid var(--line); }
.modellist a {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  padding: 13px 4px; text-decoration: none; color: var(--ink);
}
.mname { font-weight: 600; }

/* cards */
.group { margin-top: 18px; }
.count {
  font-size: .78rem; color: var(--muted); background: var(--badge-bg);
  padding: 2px 8px; border-radius: 999px; vertical-align: middle;
}
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 12px; margin-bottom: 10px;
}
.card.alt { border-style: dashed; }
.card > header { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.tag {
  font-size: .72rem; font-weight: 700; letter-spacing: .03em;
  background: var(--badge-bg); color: var(--muted);
  padding: 3px 7px; border-radius: 5px; text-transform: uppercase;
}
.tag.size { background: var(--accent); color: var(--accent-ink); }
.badge {
  font-style: normal; font-size: .74rem; background: var(--badge-bg);
  color: var(--muted); padding: 3px 7px; border-radius: 999px;
}
.badges { display: inline-flex; flex-wrap: wrap; gap: 4px; }
.raw { margin: 8px 0 0; font-size: .82rem; color: var(--muted); }
.raw code { font-size: .82rem; word-break: break-word; }

/* price table */
.ptable { width: 100%; border-collapse: collapse; margin-top: 10px; font-size: .93rem; }
.ptable th {
  text-align: left; font-size: .72rem; text-transform: uppercase;
  letter-spacing: .03em; color: var(--muted); font-weight: 600;
  padding: 0 0 6px; border-bottom: 1px solid var(--line);
}
.ptable th.num, .ptable td.num {
  text-align: right; white-space: nowrap; padding-left: 12px;
}
.ptable td { padding: 8px 0; border-bottom: 1px solid var(--line); }
.ptable tr:last-child td { border-bottom: 0; }
.ptable td.min { color: var(--muted); }

.sizes { margin: 10px 0 0; padding-left: 18px; font-size: .9rem; }
.sizes li { margin: 3px 0; }

.none, .warn {
  background: var(--warn-bg); color: var(--warn); padding: 11px 13px;
  border-radius: var(--radius); font-size: .92rem; margin: 0;
}
.warn { margin-bottom: 8px; }
.error { background: var(--warn-bg); color: var(--warn); padding: 10px 12px; border-radius: 10px; }

details.info { margin-top: 10px; font-size: .9rem; }
details.info summary { cursor: pointer; color: var(--accent); }
details.info p { white-space: pre-wrap; }

/* login */
.login { max-width: 360px; margin: 12vh auto; padding: 24px; }
.login h1 { margin: 0; }
.login form { display: grid; gap: 14px; margin-top: 18px; }
.login label { display: grid; gap: 6px; font-size: .9rem; color: var(--muted); }
.login input {
  padding: 13px; font-size: 1.05rem; border: 1px solid var(--line);
  border-radius: var(--radius); background: var(--card); color: var(--ink);
}
.login button {
  padding: 14px; font-size: 1rem; font-weight: 600; border: 0;
  border-radius: var(--radius); background: var(--accent); color: var(--accent-ink);
}

/* số chỗ ngồi */
.badge.seats { background: var(--accent); color: var(--accent-ink); font-weight: 600; }
.badge.unknown { opacity: .7; font-style: italic; }
.sizes li.fits { font-weight: 600; }
.sizes li.nofit { opacity: .55; }
.src { margin: 10px 0 0; font-size: .82rem; color: var(--muted); }
.src code { font-size: .82rem; }

/* trang rà soát số chỗ */
.filters { margin-bottom: 10px; }
.chip.on { border-color: var(--accent); color: var(--accent); font-weight: 600; }
.chip.warnchip { background: var(--warn-bg); color: var(--warn); }
.seatlist a { gap: 6px; }
.seatlist .note { flex-basis: 100%; }

/* gợi ý khi gõ sai tên xe */
.chip.guess { border-color: var(--accent); color: var(--accent); font-weight: 600; }

/* trang cập nhật dữ liệu */
.card.ok { border-color: var(--accent); }
.uploadform { display: grid; gap: 10px; margin-top: 10px; }
.uploadform input[type=file] { font-size: .9rem; }
.uploadform button, button.ghost {
  padding: 13px; font-size: 1rem; font-weight: 600; border: 0;
  border-radius: var(--radius); background: var(--accent); color: var(--accent-ink);
}
button.ghost {
  background: transparent; color: var(--muted);
  border: 1px solid var(--line); margin-top: 8px;
}

/* ảnh xe */
.modelphoto { margin: 10px 0 0; }
.modelphoto img {
  width: 100%; max-width: 320px; height: auto; display: block;
  border-radius: 10px; background: var(--badge-bg);
}
.modelphoto figcaption { margin-top: 5px; }
.imggrid {
  display: grid; gap: 12px;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
}
.imgcard { margin: 0; background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden; }
.imgcard img { width: 100%; height: auto; display: block; background: var(--badge-bg); }
.imgcard figcaption { padding: 8px 10px 10px; display: grid; gap: 3px; font-size: .86rem; }
.imgcard details summary { font-size: .82rem; color: var(--accent); cursor: pointer; }
.badge.win { background: var(--warn-bg); color: var(--warn); font-weight: 600; }

/* chọn loại cửa sổ */
.winrow { padding: 10px 12px; }
.winpick { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 9px; }
.winpick .pick {
  flex: 1 1 auto; min-width: 104px; padding: 11px 10px; font-size: .86rem;
  border: 1px solid var(--line); border-radius: 9px;
  background: var(--card); color: var(--ink); font-weight: 500;
}
.winpick .pick.on { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 700; }
.winpick .pick.clear { flex: 0 0 auto; min-width: 0; color: var(--muted); }