/* =============================================================
   SFI API Docs — GitBook style theme
   Dùng chung cho mọi trang trong APIDocs/ExConnection/
   Class name giữ nguyên như bản cũ, chỉ đổi cách trình bày.
   ============================================================= */

:root {
    --gb-accent:        #c10006;
    --gb-accent-soft:   #fceceb;
    --gb-text:          #14161a;
    --gb-text-muted:    #333a45;
    --gb-text-dim:      #6a7280;
    --gb-border:        #e6e8eb;
    --gb-border-soft:   #f0f1f3;
    --gb-bg:            #ffffff;
    --gb-bg-soft:       #f7f8fa;
    --gb-code-bg:       #f6f7f9;
    --gb-topbar-h:      56px;
    --gb-sidebar-w:     288px;
    --gb-toc-w:         232px;
    --gb-mono:          'SFMono-Regular', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    --gb-sans:          -apple-system, BlinkMacSystemFont, 'Segoe UI', Inter, Roboto, 'Helvetica Neue', sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
    font-family: var(--gb-sans);
    background: var(--gb-bg);
    color: var(--gb-text);
    line-height: 1.7;
    font-size: 15px;
    font-weight: 420;
}

/* ---------- Thanh trên cùng ---------- */
.gb-top {
    position: sticky; top: 0; z-index: 50;
    height: var(--gb-topbar-h);
    display: flex; align-items: center; gap: 14px;
    padding: 0 20px;
    background: rgba(255,255,255,.92);
    backdrop-filter: saturate(180%) blur(8px);
    border-bottom: 1px solid var(--gb-border);
}
.gb-top .gb-brand {
    display: flex; align-items: center; gap: 9px;
    font-size: 14px; font-weight: 700; color: var(--gb-text);
    text-decoration: none; white-space: nowrap;
    padding: 4px 6px; margin-left: -6px; border-radius: 7px;
}
.gb-top a.gb-brand:hover { background: var(--gb-bg-soft); text-decoration: none; }
.gb-top .gb-brand .gb-logo {
    width: 24px; height: 24px; border-radius: 6px;
    background: var(--gb-accent); color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-size: 11px; font-weight: 800; letter-spacing: .02em;
}
.gb-top .gb-crumb { font-size: 13px; color: var(--gb-text-dim); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.gb-top .gb-crumb::before { content: '/'; margin-right: 10px; color: var(--gb-border); }
.gb-top .gb-top-right { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.gb-top .gb-top-link {
    font-size: 13px; color: var(--gb-text-muted); text-decoration: none;
    padding: 5px 10px; border-radius: 6px; white-space: nowrap;
}
.gb-top .gb-top-link:hover { background: var(--gb-bg-soft); color: var(--gb-text); }
.gb-burger {
    display: none; width: 34px; height: 34px; border: 1px solid var(--gb-border);
    border-radius: 7px; background: #fff; cursor: pointer;
    align-items: center; justify-content: center; font-size: 15px; color: var(--gb-text-muted);
}

/* ---------- Bố cục ---------- */
.layout { display: flex; align-items: flex-start; }

nav {
    width: var(--gb-sidebar-w); flex-shrink: 0;
    background: var(--gb-bg); color: var(--gb-text-muted);
    border-right: 1px solid var(--gb-border);
    padding: 22px 12px 48px;
    position: sticky; top: var(--gb-topbar-h);
    height: calc(100vh - var(--gb-topbar-h));
    overflow-y: auto;
    scrollbar-width: thin;
}
nav::-webkit-scrollbar { width: 8px; }
nav::-webkit-scrollbar-thumb { background: #e2e5ea; border-radius: 8px; }

nav .nav-title {
    font-size: 12px; font-weight: 700; color: var(--gb-text-dim);
    padding: 0 12px 12px; margin-bottom: 6px;
    border-bottom: 1px solid var(--gb-border-soft);
    letter-spacing: .06em; text-transform: uppercase; line-height: 1.5;
}
nav .nav-title small { font-weight: 600; color: var(--gb-text-dim); }

nav a {
    display: block; padding: 6px 12px; margin: 1px 0;
    font-size: 14px; font-weight: 500; color: #3d4450; text-decoration: none;
    border-radius: 7px; transition: background .12s, color .12s;
}
nav a:hover { background: var(--gb-bg-soft); color: var(--gb-text); }
nav a.sub { padding-left: 24px; font-size: 13.5px; }
nav a.gb-active { background: var(--gb-accent-soft); color: var(--gb-accent); font-weight: 600; }
nav a.test-link { color: #0f766e; }
nav a.gb-home { font-weight: 600; color: var(--gb-text); }

nav .nav-group { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--gb-border-soft); }
nav .nav-label {
    font-size: 11px; font-weight: 700; color: var(--gb-text-dim);
    padding: 0 12px 4px; text-transform: uppercase; letter-spacing: .07em;
}
nav .nav-soon { font-size: 11px; color: var(--gb-text-dim); padding: 4px 12px 0; font-style: italic; }

main {
    flex: 1; min-width: 0;
    padding: 40px 56px 96px;
    max-width: 860px;
}

/* Mục lục bên phải */
.gb-toc {
    width: var(--gb-toc-w); flex-shrink: 0;
    position: sticky; top: var(--gb-topbar-h);
    height: calc(100vh - var(--gb-topbar-h));
    overflow-y: auto;
    padding: 40px 20px 60px 0;
}
.gb-toc .gb-toc-title {
    font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .07em;
    color: var(--gb-text-dim); margin-bottom: 10px;
}
.gb-toc a {
    display: block; font-size: 13px; line-height: 1.5; padding: 4px 0 4px 12px;
    color: var(--gb-text-muted); font-weight: 500; text-decoration: none;
    border-left: 2px solid var(--gb-border);
}
.gb-toc a:hover { color: var(--gb-text); }
.gb-toc a.lv3 { padding-left: 24px; font-size: 12.5px; }
.gb-toc a.gb-active { color: var(--gb-accent); border-left-color: var(--gb-accent); font-weight: 600; }

/* ---------- Chữ ---------- */
h1 { font-size: 32px; font-weight: 700; letter-spacing: -.02em; color: var(--gb-text); margin-bottom: 8px; line-height: 1.25; }
h2 {
    font-size: 22px; font-weight: 700; letter-spacing: -.01em; color: var(--gb-text);
    margin: 44px 0 14px; padding: 0; border: none; line-height: 1.35;
}
h3 { font-size: 17px; font-weight: 700; color: var(--gb-text); margin: 30px 0 10px; }
h4 { font-size: 13px; font-weight: 700; color: var(--gb-text-muted); margin: 20px 0 6px; text-transform: uppercase; letter-spacing: .04em; }
p { margin-bottom: 14px; color: var(--gb-text-muted); font-size: 15px; font-weight: 420; }
ul, ol { margin: 0 0 14px 22px; color: var(--gb-text-muted); font-size: 15px; font-weight: 420; }
li { margin-bottom: 6px; }
a { color: var(--gb-accent); text-decoration: none; }
a:hover { text-decoration: underline; }
strong, b { color: var(--gb-text); font-weight: 700; }
hr { border: none; border-top: 1px solid var(--gb-border); margin: 32px 0; }
h2[id], h3[id], [id] { scroll-margin-top: calc(var(--gb-topbar-h) + 16px); }

.subtitle { color: var(--gb-text-muted); font-size: 16px; margin-bottom: 8px; }

/* ---------- Đầu trang ---------- */
.header {
    background: transparent; border: none; border-bottom: 1px solid var(--gb-border);
    border-radius: 0; padding: 0 0 24px; margin: 0 0 8px;
}
.header h1 { margin-bottom: 8px; }
.header .subtitle, .header-sub { margin-bottom: 0; font-size: 16px; color: var(--gb-text-muted); }
.base-urls { display: flex; gap: 8px; margin-top: 16px; flex-wrap: wrap; }
.base-url {
    background: var(--gb-bg-soft); border: 1px solid var(--gb-border); border-radius: 7px;
    padding: 5px 10px; font-size: 12.5px; font-family: var(--gb-mono); color: var(--gb-text);
}
.base-url .tag {
    font-size: 10px; background: var(--gb-accent); color: #fff; padding: 1px 6px;
    border-radius: 4px; margin-left: 7px; font-family: var(--gb-sans); vertical-align: middle;
    font-weight: 700; letter-spacing: .02em;
}
.base-url .tag-backup { background: #97a0ae; }
.base-url .tag.stream { background: #0f766e; }

/* ---------- Khối nội dung (phẳng như GitBook) ---------- */
.card, .group, .section {
    background: transparent; border: none; border-radius: 0;
    padding: 0; margin: 0 0 8px;
}
.card > h2:first-child, .group > h2:first-child, .section > h2:first-child { margin-top: 44px; }
.group-head {
    display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
    margin: 48px 0 6px; padding-bottom: 12px; border-bottom: 1px solid var(--gb-border);
}
.group-head h2 { margin: 0; padding: 0; border: none; }
.group-num {
    width: 24px; height: 24px; flex-shrink: 0; background: var(--gb-accent-soft); color: var(--gb-accent);
    border-radius: 6px; display: flex; align-items: center; justify-content: center;
    font-size: 12px; font-weight: 700;
}
.group-desc { color: var(--gb-text-muted); font-size: 14px; margin-bottom: 4px; }

/* ---------- Hint block kiểu GitBook ---------- */
.note, .info, .warn, .soon {
    border: 1px solid var(--gb-border); border-left-width: 3px;
    border-radius: 6px; padding: 12px 16px; font-size: 14px; margin: 16px 0;
}
.note  { background: #fffaf0; border-left-color: #e9a13b; color: #7a4a10; }
.note strong { color: #8a5310; }
.info  { background: #f2f7ff; border-left-color: var(--gb-accent); color: #1b4b8f; }
.info strong { color: #14417d; }
.warn  { background: #fff5f5; border-left-color: #e05252; color: #94282a; }
.warn strong { color: #a52a2a; }
.soon  { background: var(--gb-bg-soft); border: 1px dashed #cdd2da; color: var(--gb-text-dim); }
.soon strong { color: var(--gb-text-muted); }
.note p:last-child, .info p:last-child, .warn p:last-child { margin-bottom: 0; }

/* ---------- Badge ---------- */
.badge {
    display: inline-block; padding: 2px 8px; border-radius: 5px;
    font-size: 11px; font-weight: 700; font-family: var(--gb-mono);
    margin-right: 6px; vertical-align: middle; letter-spacing: .02em;
}
.badge-get   { background: #e7f0ff; color: #1d4ed8; }
.badge-post  { background: #e6f7ec; color: #166534; }
.badge-key   { background: #fdeaea; color: #b91c1c; }
.badge-jwt   { background: #f0ebfe; color: #6d28d9; }
.badge-open  { background: #e6f7ec; color: #166534; }
.badge-sse   { background: #e2f8f4; color: #0f766e; }
.badge-ws    { background: #f0ebfe; color: #6d28d9; }
.badge-test  { background: #e2f8f4; color: #0f766e; }

.endpoint-title {
    display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
    margin: 34px 0 10px; padding-top: 4px;
}
.endpoint-title h3 { margin: 0; font-family: var(--gb-mono); font-size: 16px; }

/* ---------- Code ---------- */
pre {
    background: var(--gb-code-bg); color: #223; border: 1px solid var(--gb-border);
    padding: 14px 16px; border-radius: 8px; font-size: 13px;
    overflow: auto; margin: 14px 0; line-height: 1.6;
}
pre, code { font-family: var(--gb-mono); }
.note pre, .info pre, .warn pre { background: #fff; max-height: 220px; }
p code, li code, td code, th code, .test code, .gb-toc code {
    background: var(--gb-code-bg); border: 1px solid var(--gb-border-soft);
    padding: .5px 5px; border-radius: 4px; font-size: 12.5px; color: #2b313b;
}
.gb-copy {
    position: absolute; top: 8px; right: 8px; font-size: 11px; font-weight: 600;
    padding: 3px 9px; border-radius: 6px; border: 1px solid var(--gb-border);
    background: #fff; color: var(--gb-text-muted); cursor: pointer; opacity: 0;
    transition: opacity .12s;
}
.gb-pre { position: relative; }
.gb-pre:hover .gb-copy { opacity: 1; }
.gb-copy:hover { background: var(--gb-bg-soft); color: var(--gb-text); }

/* ---------- Bảng ---------- */
.table-wrap {
    overflow-x: auto; margin: 16px 0;
    border: 1px solid var(--gb-border); border-radius: 8px;
}
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.table-wrap table { margin: 0; }
th {
    background: var(--gb-bg-soft); text-align: left; padding: 10px 14px;
    font-weight: 700; color: var(--gb-text); border-bottom: 1px solid var(--gb-border);
    font-size: 12.5px; white-space: nowrap;
}
td { padding: 10px 14px; border-bottom: 1px solid var(--gb-border-soft); color: var(--gb-text-muted); vertical-align: top; font-weight: 420; }
tr:last-child td { border-bottom: none; }
td:first-child { font-family: var(--gb-mono); font-size: 12.5px; color: #2b313b; font-weight: 500; }
td.plain:first-child { font-family: var(--gb-sans); color: var(--gb-text-muted); }
.req { color: #b91c1c; font-weight: 700; font-size: 11px; }
.opt { color: var(--gb-text-dim); font-size: 11px; }
.ok  { color: #166534; font-weight: 600; }
.err { color: #991b1b; font-weight: 600; }

/* ---------- Sơ đồ / các bước ---------- */
.diagram {
    background: var(--gb-code-bg); color: #35415a; border: 1px solid var(--gb-border);
    padding: 18px; border-radius: 8px; font-family: var(--gb-mono);
    font-size: 12px; line-height: 1.8; overflow-x: auto; margin: 16px 0;
}
.steps { margin: 18px 0; }
.step { display: flex; gap: 14px; margin-bottom: 14px; }
.step-num {
    width: 26px; height: 26px; flex-shrink: 0; background: var(--gb-accent-soft); color: var(--gb-accent);
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-size: 12px; font-weight: 700; margin-top: 3px;
}
.step-body { flex: 1; }
.step-body strong { display: block; font-size: 15px; color: var(--gb-text); margin-bottom: 2px; }
.step-body span { font-size: 14px; color: var(--gb-text-muted); }

footer {
    margin-top: 64px; padding-top: 18px; border-top: 1px solid var(--gb-border);
    font-size: 13px; color: var(--gb-text-dim);
}

/* =============================================================
   Khối test chạy trực tiếp trong trang (ai-news-feed, hoc-vien)
   ============================================================= */
.cfg {
    background: var(--gb-bg-soft); border: 1px solid var(--gb-border); border-radius: 10px;
    padding: 16px 18px; margin: 18px 0 28px; box-shadow: none;
}
.cfg h4 { color: var(--gb-accent); margin: 0 0 10px; }
.cfg label { display: block; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: var(--gb-text-dim); margin-bottom: 4px; }
.cfg .hint { font-size: 11.5px; color: var(--gb-text-dim); margin-top: 8px; }
.cfg input { background: #fff; border-color: var(--gb-border); color: var(--gb-text); }
.cfg input::placeholder { color: #b3b9c4; }
.cfg .row + .row { margin-top: 10px; }
#cfgPing { color: #15803d; font-weight: 600; }

.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; }
.field { flex: 1 1 220px; min-width: 160px; }
.field.narrow { flex: 0 0 140px; }
label { display: block; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: var(--gb-text-dim); margin-bottom: 4px; }
input, select {
    width: 100%; padding: 8px 10px; border: 1px solid var(--gb-border); border-radius: 7px;
    font-size: 13px; font-family: var(--gb-mono); background: #fff; color: var(--gb-text);
}
input:focus, select:focus { outline: none; border-color: var(--gb-accent); box-shadow: 0 0 0 3px rgba(193,0,6,.13); }

button {
    cursor: pointer; font-family: inherit; font-size: 13px; font-weight: 600;
    padding: 8px 14px; border-radius: 7px; border: 1px solid transparent;
    background: var(--gb-accent); color: #fff; transition: background .15s, border-color .15s;
    white-space: nowrap;
}
button:hover { background: #9d0005; }
button:disabled { opacity: .5; cursor: not-allowed; }
button.ghost { background: #fff; color: var(--gb-text); border-color: var(--gb-border); }
button.ghost:hover { background: var(--gb-bg-soft); border-color: #cdd2da; }
button.danger { background: #b91c1c; }
button.danger:hover { background: #991b1b; }
button.tiny { font-size: 11px; padding: 4px 9px; }

.test {
    border: 1px solid var(--gb-border); background: #fff; border-radius: 10px;
    padding: 16px; margin: 16px 0 8px;
}
.test > h4 { margin-top: 0; color: #0f766e; }
.test .row + .row { margin-top: 10px; }
.test-actions { margin-top: 12px; display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

.status { font-family: var(--gb-mono); font-size: 11px; font-weight: 700; padding: 3px 8px; border-radius: 5px; background: #eceef1; color: #5b6472; }
.status.ok   { background: #e6f7ec; color: #166534; }
.status.err  { background: #fdeaea; color: #b91c1c; }
.status.wait { background: #fef3c7; color: #92400e; }
.status.live { background: #0f766e; color: #ecfeff; }

.out {
    display: none; background: #1b2130; color: #e2e8f0; border: 1px solid #1b2130;
    border-left: 3px solid #0f766e; padding: 14px; border-radius: 8px; font-size: 12px;
    font-family: var(--gb-mono); white-space: pre; overflow: auto; max-height: 380px;
    margin-top: 10px; line-height: 1.55;
}
.out.show { display: block; }
.out.wrap { white-space: pre-wrap; }
.hdrs { display: none; margin-top: 8px; font-size: 11px; font-family: var(--gb-mono); color: var(--gb-text-muted); background: var(--gb-bg-soft); border-radius: 6px; padding: 8px 10px; white-space: pre-wrap; }
.hdrs.show { display: block; }

.chips { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 10px; }
.chip { font-family: var(--gb-mono); font-size: 11px; padding: 4px 10px; border-radius: 999px; border: 1px solid #bcd4f5; background: #f2f7ff; color: #1d4ed8; cursor: pointer; }
.chip:hover { background: #e3edfd; }
.chip.flash { border-color: #86e3d3; background: #f0fdfa; color: #0f766e; }

.feed { display: none; margin-top: 12px; border: 1px solid var(--gb-border); border-radius: 10px; background: #fff; overflow: hidden; max-height: 420px; overflow-y: auto; }
.feed.show { display: block; }
.ev { border-bottom: 1px solid var(--gb-border-soft); padding: 10px 14px; }
.ev:last-child { border-bottom: none; }
.ev-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.ev-kind { font-family: var(--gb-mono); font-size: 10px; font-weight: 700; padding: 2px 8px; border-radius: 999px; }
.ev-kind.article  { background: #e7f0ff; color: #1d4ed8; }
.ev-kind.livefeed { background: #e2f8f4; color: #0f766e; }
.ev-kind.sys      { background: #eceef1; color: #475569; }
.ev .t { font-weight: 700; font-size: 14px; color: var(--gb-text); }
.ev .meta { font-family: var(--gb-mono); font-size: 11px; color: var(--gb-text-dim); margin-top: 2px; }
.ev .body { font-size: 13.5px; color: var(--gb-text-muted); margin-top: 4px; }
.ev .cut { font-family: var(--gb-mono); font-size: 10px; color: #b45309; background: #fffbeb; border: 1px solid #fde68a; border-radius: 999px; padding: 1px 7px; }
.empty { font-size: 12.5px; color: var(--gb-text-dim); font-style: italic; padding: 10px 14px; }

.preview { display: none; margin-top: 12px; border: 1px solid var(--gb-border); border-radius: 10px; background: #fff; overflow: hidden; }
.preview.show { display: block; }
.lesson-card { border-bottom: 1px solid var(--gb-border-soft); padding: 12px 14px; }
.lesson-card:last-child { border-bottom: none; }
.lesson-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.lesson-head .t { font-weight: 700; font-size: 14px; color: var(--gb-text); }
.lesson-meta { font-family: var(--gb-mono); font-size: 11px; color: var(--gb-text-dim); margin-top: 2px; }
.lesson-body { display: none; margin-top: 10px; }
.lesson-body.show { display: block; }
.lesson-body iframe { width: 100%; height: 320px; border: 1px solid var(--gb-border); border-radius: 8px; background: #fff; }

.quiz { border: 1px solid var(--gb-border); border-radius: 8px; padding: 12px 14px; margin-top: 10px; background: var(--gb-bg-soft); }
.quiz .q { font-size: 13.5px; font-weight: 700; color: var(--gb-text); white-space: pre-wrap; }
.quiz .qtype { font-family: var(--gb-mono); font-size: 10px; color: var(--gb-text-dim); text-transform: uppercase; }
.quiz label.o { display: block; font-size: 13.5px; color: var(--gb-text-muted); margin: 6px 0 0; cursor: pointer; text-transform: none; letter-spacing: 0; font-weight: 400; }
.quiz label.o input { width: auto; margin-right: 6px; }
.quiz .verdict { margin-top: 8px; font-size: 12.5px; font-weight: 700; }
.quiz .verdict.ok { color: #166534; }
.quiz .verdict.no { color: #b91c1c; }
.quiz .expl { margin-top: 4px; font-size: 12.5px; color: var(--gb-text-muted); white-space: pre-wrap; }
.quiz .key { font-family: var(--gb-mono); font-size: 11px; color: var(--gb-text-dim); margin-top: 4px; }
.hvhh-content { font-size: 14px; }

/* =============================================================
   Trang danh mục (index.html)
   ============================================================= */
.wrap { max-width: 940px; margin: 0 auto; padding: 56px 24px 96px; }
.wrap > header {
    background: transparent; color: var(--gb-text); border: none; border-radius: 0;
    padding: 0 0 28px; margin-bottom: 12px; border-bottom: 1px solid var(--gb-border);
}
.wrap > header h1 { font-size: 36px; font-weight: 700; letter-spacing: -.025em; margin-bottom: 10px; }
.wrap > header p { color: var(--gb-text-muted); font-size: 16px; max-width: 720px; }

h2.sec {
    font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em;
    color: var(--gb-text-dim); margin: 40px 0 14px; padding: 0; border: none;
}

.cards { display: grid; gap: 12px; }
.card-head { display: flex; align-items: center; gap: 11px; flex-wrap: wrap; }
a.card {
    display: block; background: #fff; border: 1px solid var(--gb-border); border-radius: 10px;
    padding: 18px 20px; text-decoration: none; color: inherit; margin: 0;
    transition: border-color .15s, box-shadow .15s;
}
a.card { position: relative; }
a.card .card-head { padding-right: 118px; }
.pic-badge {
    position: absolute; top: 12px; right: 14px;
    font-size: 11px; font-weight: 600; line-height: 1; white-space: nowrap;
    padding: 5px 9px; border-radius: 999px;
    background: #e8f7ee; color: #1a7f3c; border: 1px solid #b7e4c7;
}
@media (max-width: 520px) { a.card .card-head { padding-right: 0; } .pic-badge { position: static; display: inline-block; margin-bottom: 8px; } }
a.card:hover { border-color: #f0b9b7; box-shadow: 0 2px 10px rgba(16,24,40,.06); text-decoration: none; }
.num {
    width: 24px; height: 24px; flex-shrink: 0; background: var(--gb-accent-soft); color: var(--gb-accent);
    border-radius: 6px; display: flex; align-items: center; justify-content: center;
    font-size: 12px; font-weight: 700;
}
.card-head h3 { font-size: 16px; font-weight: 700; color: var(--gb-text); margin: 0; }
a.card .arrow { margin-left: auto; color: var(--gb-text-dim); font-size: 15px; }
a.card:hover .arrow { color: var(--gb-accent); }
a.card p.desc { font-size: 14px; color: var(--gb-text-muted); margin: 8px 0 0; font-weight: 420; }
.meta { display: flex; gap: 7px; flex-wrap: wrap; margin-top: 12px; align-items: center; }
.base {
    font-family: var(--gb-mono); font-size: 12px; color: var(--gb-text-muted);
    background: var(--gb-bg-soft); border: 1px solid var(--gb-border-soft); border-radius: 5px; padding: 2px 8px;
}
.endpoints { margin-top: 10px; font-size: 13px; color: var(--gb-text-dim); }
.endpoints code {
    font-family: var(--gb-mono); background: var(--gb-code-bg); border: 1px solid var(--gb-border-soft);
    border-radius: 4px; padding: 1px 5px; font-size: 12px; color: var(--gb-text-muted);
}
.tool {
    display: flex; align-items: center; gap: 12px; background: #fff;
    border: 1px dashed #cdd2da; border-radius: 10px; padding: 16px 20px;
    text-decoration: none; color: inherit; transition: border-color .15s;
}
.tool:hover { border-color: #0f766e; text-decoration: none; }
.tool .t { font-size: 15px; font-weight: 700; color: var(--gb-text); }
.tool .d { font-size: 13.5px; color: var(--gb-text-muted); }
.tool .arrow { margin-left: auto; color: #0f766e; font-weight: 700; }

/* =============================================================
   Responsive
   ============================================================= */
@media (max-width: 1180px) {
    .gb-toc { display: none; }
    main { padding: 40px 40px 96px; }
}
@media (max-width: 900px) {
    .gb-burger { display: flex; }
    nav {
        position: fixed; top: var(--gb-topbar-h); left: 0; z-index: 45;
        width: 300px; max-width: 86vw; height: calc(100vh - var(--gb-topbar-h));
        box-shadow: 0 10px 30px rgba(16,24,40,.14);
        transform: translateX(-101%); transition: transform .2s ease;
    }
    body.gb-nav-open nav { transform: translateX(0); }
    body.gb-nav-open::after {
        content: ''; position: fixed; inset: var(--gb-topbar-h) 0 0 0;
        background: rgba(16,24,40,.35); z-index: 40;
    }
    main { padding: 28px 18px 72px; max-width: 100%; }
    h1 { font-size: 26px; }
    h2 { font-size: 20px; }
    .wrap { padding: 32px 18px 64px; }
    .wrap > header h1 { font-size: 28px; }
}

@media print {
    .gb-top, nav, .gb-toc, .gb-copy { display: none !important; }
    main { max-width: 100%; padding: 0; }
}

/* ---------- Nút nổi "thử API trực tiếp" ---------- */
.gb-fab {
    position: fixed; bottom: 24px; right: 24px; z-index: 60;
    background: var(--gb-accent); color: #fff; text-decoration: none;
    padding: 9px 18px; border-radius: 999px; font-size: 13px; font-weight: 700;
    box-shadow: 0 6px 18px rgba(193,0,6,.26);
    transition: background .15s, box-shadow .15s, transform .15s;
}
.gb-fab:hover { background: #9d0005; text-decoration: none; transform: translateY(-1px); box-shadow: 0 8px 22px rgba(193,0,6,.32); }
@media (max-width: 900px) { .gb-fab { bottom: 16px; right: 16px; padding: 8px 14px; font-size: 12.5px; } }
@media print { .gb-fab { display: none; } }

/* ---------- Chống tràn ngang ---------- */
h1, h2, h3, h4, p, li, td, th, .subtitle { overflow-wrap: break-word; }
p code, li code, td code { overflow-wrap: anywhere; }
.base-url { max-width: 100%; overflow-x: auto; }

/* Tên lệnh trong tiêu đề khối test giữ nguyên chữ thường */
.test h4 code { text-transform: none; letter-spacing: 0; font-size: 12.5px; }