/* ============================================================
   DevOps Study Guide — style.css
   Dark mặc định, có light mode, responsive, và bản in tử tế.
   ============================================================ */

/* ---------- 1. Design tokens ---------- */
:root {
  --bg:          #0b0f14;
  --surface:     #131a22;
  --surface-2:   #1a2430;
  --surface-3:   #212d3b;
  --border:      #253040;
  --border-soft: #1c2530;
  --text:        #e6edf3;
  --text-dim:    #b3c0ce;
  --muted:       #7e8c9c;
  --accent:      #2dd4bf;
  --accent-dim:  #14b8a6;
  --accent-bg:   rgba(45, 212, 191, .12);

  --gap:     #f87171;
  --gap-bg:  rgba(248, 113, 113, .13);
  --high:    #fbbf24;
  --high-bg: rgba(251, 191, 36, .13);
  --strong:  #34d399;
  --strong-bg: rgba(52, 211, 153, .13);

  --radius:   14px;
  --radius-s: 9px;
  --shadow:   0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.24);
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, "Noto Sans", Roboto, Arial, sans-serif;
}

[data-theme="light"] {
  --bg:          #f4f7fa;
  --surface:     #ffffff;
  --surface-2:   #eef2f6;
  --surface-3:   #e3e9f0;
  --border:      #d5dde6;
  --border-soft: #e6ecf2;
  --text:        #16202b;
  --text-dim:    #35475a;
  --muted:       #64748b;
  --accent:      #0d9488;
  --accent-dim:  #0f766e;
  --accent-bg:   rgba(13, 148, 136, .10);

  --gap:     #dc2626;
  --gap-bg:  rgba(220, 38, 38, .09);
  --high:    #b45309;
  --high-bg: rgba(180, 83, 9, .10);
  --strong:  #047857;
  --strong-bg: rgba(4, 120, 87, .10);

  --shadow: 0 1px 2px rgba(16,32,48,.06), 0 6px 20px rgba(16,32,48,.08);
}

/* ---------- 2. Base ---------- */
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.62;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -webkit-text-size-adjust: 100%;
  overflow-wrap: break-word;
}

code, .mono { font-family: var(--mono); }

code {
  background: var(--surface-3);
  border: 1px solid var(--border-soft);
  border-radius: 5px;
  padding: .08em .4em;
  font-size: .87em;
  color: var(--accent);
  white-space: nowrap;
}
[data-theme="light"] code { color: var(--accent-dim); }

h1, h2, h3 { line-height: 1.3; margin: 0; font-weight: 650; letter-spacing: -.01em; }

button { font-family: inherit; font-size: inherit; cursor: pointer; }

::selection { background: var(--accent); color: #041014; }

/* ---------- 3. Topbar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 20px;
  padding: 12px 22px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

/* Danh sách trang nằm trong ngăn kéo #siteNav; thanh trên chỉ còn nút Menu + tên trang đang mở */
.nav-btn {
  flex: none;
  display: inline-flex; align-items: center; gap: 8px; height: 36px;
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--surface); color: var(--text-dim);
  padding: 0 13px; font-size: 13.5px; font-weight: 600;
  transition: border-color .15s, color .15s;
}
.nav-btn:hover, .nav-btn[aria-expanded="true"] { border-color: var(--accent); color: var(--accent); }

.crumb {
  flex: 1; min-width: 0; margin-right: auto;
  display: flex; align-items: baseline; gap: 8px;
  font-size: 13.5px; white-space: nowrap; overflow: hidden;
}
.crumb-site { color: var(--muted); text-decoration: none; font-weight: 550; }
.crumb-site:hover { color: var(--text-dim); }
.crumb-sep { color: var(--border); }
.crumb-cur { color: var(--text); font-weight: 650; overflow: hidden; text-overflow: ellipsis; }

.icon-btn {
  flex: none;
  width: 36px; height: 36px;
  display: grid; place-items: center;
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--surface); color: var(--text-dim);
  font-size: 15px;
  transition: border-color .15s, color .15s;
}
.icon-btn:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- 3b. Ngăn kéo dùng chung (menu các trang, danh sách bài) — js/common.js: moDrawer ---------- */
.scrim {
  position: fixed; inset: 0; z-index: 70;
  background: rgba(4, 8, 12, .5);
  opacity: 0; pointer-events: none; transition: opacity .2s;
}
html.has-drawer .scrim { opacity: 1; pointer-events: auto; }
html.has-drawer body { overflow: hidden; }

.drawer {
  position: fixed; top: 0; bottom: 0; left: 0; z-index: 71;
  width: min(380px, 88vw);
  display: flex; flex-direction: column;
  background: var(--surface); border-right: 1px solid var(--border); box-shadow: var(--shadow);
  transform: translateX(-102%); visibility: hidden;
  transition: transform .22s ease, visibility 0s linear .22s;
}
.drawer.is-open { transform: none; visibility: visible; transition: transform .22s ease; }

.drw-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; padding: 18px 18px 14px; border-bottom: 1px solid var(--border); }
.drw-head .kb-eyebrow { margin-bottom: 4px; }
.drw-title { font-size: 18px; font-weight: 650; letter-spacing: -.01em; }
.drw-sub { font-size: 12.5px; color: var(--muted); margin-top: 2px; }

.drw-list { flex: 1; overflow-y: auto; padding: 8px; }
.drw-item {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 9px 10px; border-radius: 9px;
  color: var(--text-dim); text-decoration: none; font-size: 13.8px; line-height: 1.45;
  transition: background .13s, color .13s;
}
.drw-item:hover { background: var(--surface-2); color: var(--text); }
.drw-item.is-active { background: var(--accent-bg); color: var(--accent); font-weight: 600; }
.drw-no { flex: none; font-family: var(--mono); font-size: 11.5px; color: var(--muted); padding-top: 2px; }
.drw-item.is-active .drw-no { color: var(--accent); }
.drw-t { flex: 1; min-width: 0; }
.drw-sep { height: 1px; margin: 8px 10px; background: var(--border); }

.drw-foot { padding: 12px 16px 16px; border-top: 1px solid var(--border); display: grid; gap: 10px; }

@media (prefers-reduced-motion: reduce) {
  .drawer, .scrim { transition: none; }
}

/* ---------- 4. Layout ---------- */
main { animation: fade .22s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

.wrap { max-width: 1180px; margin: 0 auto; padding: 28px 22px 80px; }

.section-title {
  font-size: 12px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
  color: var(--muted); margin: 0 0 12px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 22px;
}

/* ---------- 5. Trang kiến thức ---------- */
.kb-head { margin-bottom: 26px; }
.kb-eyebrow { font-size: 12px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); margin-bottom: 8px; }
.kb-title { font-size: 30px; letter-spacing: -.02em; margin-bottom: 8px; }
.kb-lead { margin: 0 0 16px; max-width: 72ch; color: var(--text-dim); font-size: 15.5px; }
.kb-skill-label { font-size: 11px; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; color: var(--muted); margin-bottom: 8px; }

.kb-body { display: grid; grid-template-columns: minmax(0, 1fr); gap: 24px; }   /* minmax(0,…): khối mã dài không được kéo phình cột */
.kb-sec { scroll-margin-top: 80px; }
.kb-h { font-size: 19px; display: flex; align-items: baseline; gap: 11px; margin-bottom: 12px; }
.kb-no {
  flex: none; font-family: var(--mono); font-size: 12px; font-weight: 700;
  color: var(--accent); background: var(--accent-bg); padding: 2px 7px; border-radius: 6px;
}

/* Các dòng CV của trang */
.cv-box { border-left: 3px solid var(--accent); }
.cv-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.cv-src { display: inline-block; font-size: 11px; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; color: var(--accent); margin-bottom: 2px; }
.cv-q { margin: 0; font-size: 13.8px; color: var(--text-dim); }
.cv-q::before { content: "\201C"; }
.cv-q::after  { content: "\201D"; }

/* Ý cần nắm */
.pts { list-style: none; margin: 0; padding: 0; }
.pts li { position: relative; padding-left: 18px; margin-bottom: 9px; font-size: 14px; color: var(--text-dim); }
.pts li:last-child { margin-bottom: 0; }
.pts li::before { content: ""; position: absolute; left: 3px; top: .68em; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); opacity: .85; }
.pts b, .cmd-d b, .tbl b, .kb-lead b { color: var(--text); font-weight: 650; }

/* Bảng so sánh */
.tbl-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius-s); }
.tbl { width: 100%; min-width: 540px; border-collapse: collapse; font-size: 13.2px; }
.tbl th, .tbl td { text-align: left; vertical-align: top; padding: 9px 12px; border-bottom: 1px solid var(--border-soft); color: var(--text-dim); }
.tbl th { background: var(--surface-2); color: var(--muted); font-size: 11.5px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; }
.tbl td:first-child { color: var(--text); font-weight: 600; }
.tbl tr:last-child td { border-bottom: 0; }
.tbl code { white-space: normal; overflow-wrap: anywhere; }

/* Khối mã mẫu */
.code {
  margin: 0; padding: 12px 14px; overflow-x: auto;
  background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-s);
  font-family: var(--mono); font-size: 12.6px; line-height: 1.6; color: var(--text-dim); tab-size: 2;
}
.code code { background: none; border: 0; padding: 0; color: inherit; font-size: inherit; white-space: pre; overflow-wrap: normal; }

/* Danh sách lệnh */
.cmds { border: 1px solid var(--border); border-radius: var(--radius-s); overflow: hidden; }
.cmd { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 4px 18px; align-items: baseline; padding: 8px 12px; border-bottom: 1px solid var(--border-soft); }
.cmd:last-child { border-bottom: 0; }
.cmd-c { font-family: var(--mono); font-size: 12.5px; color: var(--accent); overflow-wrap: anywhere; }
[data-theme="light"] .cmd-c { color: var(--accent-dim); }
.cmd-d { font-size: 13px; color: var(--text-dim); }

/* Gắn với CV */
.cvtip {
  display: flex; gap: 11px;
  background: var(--strong-bg);
  border: 1px solid color-mix(in srgb, var(--strong) 26%, transparent);
  border-radius: var(--radius-s);
  padding: 12px 14px;
  font-size: 13.4px; color: var(--text-dim);
}
.cvtip > div b:first-child { color: var(--strong); font-weight: 700; }
.cvtip-ico { flex: none; color: var(--strong); }
.trap + .trap { margin-top: 8px; }

/* Nối sang ngân hàng câu hỏi + chuyển trang */
.rel { display: flex; flex-wrap: wrap; gap: 8px; }
.rel a {
  display: inline-flex; align-items: baseline; gap: 9px;
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 10px;
  padding: 8px 13px; font-size: 13.6px; font-weight: 600; color: var(--text-dim); text-decoration: none;
  transition: border-color .15s, color .15s;
}
.rel a:hover { border-color: var(--accent); color: var(--accent); }
.rel .n { font-size: 11.5px; font-weight: 500; color: var(--muted); }

.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.pg {
  display: grid; gap: 2px; padding: 13px 16px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  color: var(--text); text-decoration: none; transition: border-color .15s;
}
.pg:hover { border-color: var(--accent); }
.pg-next { grid-column: 2; text-align: right; }
.pg-k { font-size: 11.5px; font-weight: 600; color: var(--muted); }
.pg-t { font-size: 14.5px; font-weight: 650; }

/* ---------- 6. Bố cục hai cột: mục lục bên trái + nội dung (ngân hàng câu hỏi và trang kiến thức) ---------- */
.bank, .kb-layout { display: grid; grid-template-columns: 236px minmax(0, 1fr); gap: 24px; align-items: start; }
.bank > *, .kb-layout > * { min-width: 0; }   /* không có dòng này, dải chip cuộn ngang sẽ kéo phình cả grid */

.sidebar { position: sticky; top: 74px; }
.side-group + .side-group { margin-top: 18px; }
.side-head {
  font-size: 11px; font-weight: 700; letter-spacing: .09em; text-transform: uppercase;
  color: var(--muted); padding: 0 10px 7px;
}
.side-link {
  display: flex; align-items: center; gap: 8px; width: 100%;
  border: 0; background: transparent; color: var(--text-dim);
  padding: 6px 10px; border-radius: 8px; font-size: 13.4px; text-align: left; text-decoration: none;
  transition: background .13s, color .13s;
}
.side-link:hover { background: var(--surface-2); color: var(--text); }
.side-link.is-active { background: var(--accent-bg); color: var(--accent); font-weight: 600; }
.side-count { margin-left: auto; font-size: 11.5px; color: var(--muted); font-variant-numeric: tabular-nums; }
.side-link.is-active .side-count { color: var(--accent); }
.side-no { flex: none; font-family: var(--mono); font-size: 11px; color: var(--muted); }
.side-link.is-active .side-no { color: var(--accent); }

/* ---------- 7. Toolbar ---------- */
.toolbar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 18px; }

.search {
  flex: 1 1 240px; min-width: 200px;
  display: flex; align-items: center; gap: 9px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 0 12px;
}
.search:focus-within { border-color: var(--accent); }
.search input {
  flex: 1; border: 0; outline: 0; background: transparent;
  color: var(--text); font-family: inherit; font-size: 14px; padding: 9px 0;
}
.search input::placeholder { color: var(--muted); }

.seg { display: flex; gap: 3px; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 3px; }
.seg button {
  border: 0; background: transparent; color: var(--muted);
  padding: 6px 11px; border-radius: 7px; font-size: 12.8px; font-weight: 550; white-space: nowrap;
}
.seg button:hover { color: var(--text-dim); }
.seg button.is-active { background: var(--surface-3); color: var(--text); }
.seg button[data-uu="gap"].is-active     { background: var(--gap-bg);    color: var(--gap); }
.seg button[data-uu="high"].is-active    { background: var(--high-bg);   color: var(--high); }
.seg button[data-uu="strong"].is-active  { background: var(--strong-bg); color: var(--strong); }

.toggle {
  display: flex; align-items: center; gap: 8px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 8px 12px; font-size: 12.8px; color: var(--text-dim);
  user-select: none;
}
.toggle input { width: 15px; height: 15px; accent-color: var(--accent); cursor: pointer; margin: 0; }

.result-line { font-size: 12.5px; color: var(--muted); margin-bottom: 12px; }

/* ---------- 8. Question card ---------- */
.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--c);
  border-radius: var(--radius);
  margin-bottom: 11px;
  overflow: hidden;
  transition: border-color .15s, box-shadow .18s, transform .18s;
}
.card:hover { box-shadow: var(--shadow); }
.card.is-open { border-color: var(--border); box-shadow: var(--shadow); }

.card-head { display: flex; align-items: flex-start; gap: 14px; padding: 15px 18px; cursor: pointer; }
.card-head:hover .card-q { color: var(--text); }

.card-main { flex: 1; min-width: 0; }

.card-meta { display: flex; align-items: center; gap: 9px; flex-wrap: wrap; margin-bottom: 7px; }

.pri {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 11px; font-weight: 700; letter-spacing: .02em;
  padding: 2px 8px; border-radius: 6px;
  color: var(--c); background: var(--c-bg);
}
.topic { font-size: 11.8px; color: var(--muted); }
.qid { font-family: var(--mono); font-size: 11px; color: var(--muted); opacity: .75; }

.card-q { font-size: 15.2px; font-weight: 600; color: var(--text-dim); margin: 0; transition: color .15s; }
.card.is-open .card-q { color: var(--text); }

.status-set { display: flex; gap: 3px; flex: none; }
.status-set button {
  width: 27px; height: 27px; display: grid; place-items: center;
  border: 1px solid var(--border); border-radius: 7px;
  background: transparent; color: var(--muted); font-size: 12px;
  transition: all .13s;
}
.status-set button:hover { border-color: var(--text-dim); color: var(--text-dim); }
.status-set button.on[data-s="new"]    { background: var(--surface-3); color: var(--text-dim); border-color: var(--border); }
.status-set button.on[data-s="review"] { background: var(--high-bg);   color: var(--high);   border-color: var(--high); }
.status-set button.on[data-s="known"]  { background: var(--strong-bg); color: var(--strong); border-color: var(--strong); }

.chev { flex: none; color: var(--muted); font-size: 11px; transition: transform .2s; margin-top: 4px; }
.card.is-open .chev { transform: rotate(180deg); }

.card-body { display: none; padding: 0 18px 18px; border-top: 1px dashed var(--border); margin-top: 2px; padding-top: 16px; }
.card.is-open .card-body { display: block; }

.blk + .blk { margin-top: 16px; }
.blk-head {
  font-size: 10.5px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 9px;
}

.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  font-family: var(--mono); font-size: 12px;
  background: var(--accent-bg); color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
  padding: 3px 9px; border-radius: 7px;
}

.steps { list-style: none; margin: 0; padding: 0; counter-reset: s; }
.steps li {
  counter-increment: s;
  position: relative; padding-left: 30px; margin-bottom: 10px;
  font-size: 14px; color: var(--text-dim);
}
.steps li:last-child { margin-bottom: 0; }
.steps li::before {
  content: counter(s);
  position: absolute; left: 0; top: 1px;
  width: 20px; height: 20px; display: grid; place-items: center;
  border-radius: 6px; background: var(--surface-3); color: var(--muted);
  font-family: var(--mono); font-size: 11px; font-weight: 700;
}

.trap {
  display: flex; gap: 11px;
  background: var(--high-bg);
  border: 1px solid color-mix(in srgb, var(--high) 26%, transparent);
  border-radius: var(--radius-s);
  padding: 12px 14px;
  font-size: 13.4px; color: var(--text-dim);
}
.trap b { color: var(--high); font-weight: 700; }
.trap-ico { flex: none; color: var(--high); }

.empty { text-align: center; padding: 60px 20px; color: var(--muted); }
.empty-big { font-size: 32px; margin-bottom: 10px; opacity: .5; }

/* ---------- 9. Nút ---------- */
.btn {
  border: 1px solid var(--border); background: var(--surface-2); color: var(--text);
  padding: 10px 20px; border-radius: 10px; font-size: 14px; font-weight: 600;
  transition: all .14s;
}
.btn:hover { border-color: var(--text-dim); }
.btn-ghost { background: transparent; }

/* ---------- 10. Responsive ---------- */

/* --- Máy tính bảng: bỏ cột sidebar, dồn về một cột --- */
@media (max-width: 1000px) {
  .bank, .kb-layout { grid-template-columns: minmax(0, 1fr); }
  .sidebar { position: static; }
  .side-nav { display: flex; flex-wrap: wrap; gap: 6px; }
  .side-group { display: contents; }
  .side-head { width: 100%; padding: 8px 0 2px; }
  .side-link { width: auto; background: var(--surface); border: 1px solid var(--border); }
}

/* --- Điện thoại --- */
@media (max-width: 760px) {

  body { font-size: 15px; line-height: 1.66; }

  /* Thanh trên: nút Menu, tên trang, nút đổi nền trên một hàng; bỏ tên site cho đủ chỗ */
  .topbar { gap: 10px; padding: 9px 14px; }
  .icon-btn { width: 34px; height: 34px; }
  .nav-btn { height: 34px; padding: 0 11px; }
  .crumb-site, .crumb-sep { display: none; }

  .wrap { padding: 18px 14px 64px; }
  .panel { padding: 15px 16px; border-radius: 12px; }

  /* Chủ đề: dải cuộn ngang một hàng, tràn sát mép máy */
  .sidebar { margin: 0 -14px 16px; min-width: 0; }
  .side-nav {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding: 2px 14px;
    scroll-snap-type: x proximity;
  }
  .side-nav::-webkit-scrollbar { display: none; }
  .side-head { display: none; }
  .side-link { flex: none; white-space: nowrap; padding: 7px 13px; scroll-snap-align: start; }

  /* Thanh công cụ: ô tìm kiếm riêng một hàng */
  .toolbar { gap: 7px; margin-bottom: 13px; }
  .search { flex: 1 1 100%; min-width: 0; }
  .search input { font-size: 16px; }   /* dưới 16px thì iOS tự phóng to trang khi gõ */
  .seg { flex: 1 1 100%; min-width: 0; overflow-x: auto; scrollbar-width: none; }
  .seg::-webkit-scrollbar { display: none; }
  .seg button { flex: 1 1 auto; white-space: nowrap; padding: 7px 9px; font-size: 12.5px; }
  .toggle { flex: 1 1 auto; justify-content: center; padding: 8px 11px; }
  #btnMoHet { flex: 0 0 auto; padding: 8px 14px !important; }

  /* Thẻ câu hỏi: mũi tên nằm cạnh câu hỏi, nút trạng thái chỉ hiện khi mở thẻ
     — nhờ vậy lúc lướt tìm câu, mỗi màn hình thấy được nhiều câu hơn hẳn */
  .card { border-radius: 12px; margin-bottom: 9px; }
  .card-head { flex-wrap: wrap; gap: 9px 8px; padding: 12px 14px; }
  .card-main { flex: 1 1 calc(100% - 30px); }
  .card-q { font-size: 15.4px; }
  .chev { flex: none; align-self: flex-start; margin: 2px 0 0; padding: 4px; }
  .status-set { flex: 1 1 100%; order: 3; flex-direction: row; gap: 6px; }
  .status-set button { flex: 1; width: auto; height: 38px; font-size: 14px; }
  .card:not(.is-open) .status-set { display: none; }
  .card-body { padding: 15px 14px 16px; }
  .steps li { padding-left: 27px; font-size: 14.6px; }
  .trap { font-size: 14px; padding: 12px 13px; }
  .blk + .blk { margin-top: 15px; }

  /* Mã dài phải xuống dòng — không thì bị .card cắt mất chữ */
  code { white-space: normal; overflow-wrap: anywhere; }
  .chip { overflow-wrap: anywhere; }

  /* Trang kiến thức */
  .kb-head { margin-bottom: 18px; }
  .kb-title { font-size: 24px; }
  .kb-lead { font-size: 15px; }
  .kb-body { gap: 18px; }
  .kb-h { font-size: 17.5px; }
  .pts li { font-size: 14.6px; }
  .cv-q { font-size: 14.2px; }
  .cmd { grid-template-columns: minmax(0, 1fr); gap: 3px; padding: 10px 12px; }
  .cmd-d { font-size: 13.6px; }
  .cvtip { font-size: 14px; padding: 12px 13px; }
  .code { font-size: 12px; padding: 11px 12px; }
  .pager { gap: 9px; }
  .pg { padding: 11px 13px; }

}

/* --- Điện thoại nhỏ (iPhone SE, máy 360px) --- */
@media (max-width: 400px) {
  .nav-btn-t { display: none; }
  .card-q { font-size: 15px; }
  .side-link { padding: 7px 11px; font-size: 13px; }
}

/* ---------- 11. Print ---------- */
@media print {
  :root {
    --bg: #fff; --surface: #fff; --surface-2: #fff; --surface-3: #f2f2f2;
    --border: #bbb; --border-soft: #ddd;
    --text: #000; --text-dim: #222; --muted: #555; --accent: #0a6b60;
  }
  body { background: #fff; font-size: 11pt; }
  .topbar, .drawer, .scrim, .toolbar, .sidebar, .status-set, .chev, .icon-btn, .result-line, .pager { display: none !important; }
  .bank, .kb-layout { grid-template-columns: minmax(0, 1fr); }
  .kb-sec { break-inside: avoid-page; }
  .code { white-space: pre-wrap; }
  .code code { white-space: pre-wrap; }
  .wrap { max-width: none; padding: 0; }
  .card { break-inside: avoid; box-shadow: none; margin-bottom: 8pt; border: 1px solid #ccc; }
  .card .card-body { display: block !important; }
  .card-head { cursor: default; padding: 10pt 12pt 0; }
  .panel { break-inside: avoid; border: 1px solid #ccc; }
  a { color: #000; text-decoration: none; }
}