/* Trang Tài liệu API công khai (/api-docs) - views/panel/api_docs_public.ejs.
   Trang tự chứa: không nạp style.bundle.css, mọi class có tiền tố apd-. */

:root {
    --apd-brand: #0b57b7;
    --apd-brand-ink: #004080;
    --apd-brand-soft: #eaf2fd;
    --apd-ink: #0f172a;
    --apd-text: #334155;
    --apd-muted: #64748b;
    --apd-line: #e5e9f0;
    --apd-line-soft: #eef1f6;
    --apd-bg: #f7f9fc;
    --apd-card: #fff;
    --apd-code-bg: #0d1424;
    --apd-code-bar: #151d30;
    --apd-code-ink: #d6deeb;
    --apd-ok: #0f9d6b;
    --apd-ok-soft: #e6f7f0;
    --apd-warn: #b45309;
    --apd-warn-soft: #fff4e5;
    --apd-err: #d93b3b;
    --apd-radius: 12px;
    --apd-top-h: 60px;
    --apd-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --apd-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--apd-top-h) + 16px); }
body.apd { margin: 0; background: var(--apd-bg); color: var(--apd-text); font: 15px/1.6 var(--apd-font);
    -webkit-font-smoothing: antialiased; }
.apd a { color: var(--apd-brand); text-decoration: none; }
.apd a:hover { text-decoration: underline; }
.apd code { font-family: var(--apd-mono); font-size: .86em; background: #eef2f7; color: #1e3a5f;
    padding: .12em .4em; border-radius: 5px; }
.apd h1, .apd h2, .apd h3 { color: var(--apd-ink); line-height: 1.25; margin: 0; }
.apd b { color: var(--apd-ink); font-weight: 600; }
.apd-muted { color: var(--apd-muted); font-size: 14px; }
[hidden] { display: none !important; }

/* Hai phiên bản: phần tử gắn data-v chỉ hiện khi khớp phiên bản đang chọn. */
.apd[data-version="v2"] [data-v="v3"], .apd[data-version="v3"] [data-v="v2"] { display: none !important; }

/* ---------- Thanh trên ---------- */
.apd-top { position: sticky; top: 0; z-index: 30; height: var(--apd-top-h); display: flex; align-items: center; gap: 10px;
    padding: 0 20px; background: rgba(255, 255, 255, .9); border-bottom: 1px solid var(--apd-line);
    -webkit-backdrop-filter: saturate(180%) blur(12px); backdrop-filter: saturate(180%) blur(12px); }
.apd-top__brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 16px; color: var(--apd-brand-ink) !important; }
.apd-top__brand:hover { text-decoration: none !important; }
.apd-top__brand img { height: 32px; width: auto; }
.apd-top__tag { font-size: 12px; font-weight: 600; color: var(--apd-brand); background: var(--apd-brand-soft);
    padding: 3px 9px; border-radius: 999px; }
.apd-top__spacer { flex: 1; }
.apd-top__menu { display: none; border: 0; background: none; color: var(--apd-ink); padding: 6px; margin-left: -6px; cursor: pointer; border-radius: 8px; }
.apd-top__menu:hover { background: var(--apd-line-soft); }

/* ---------- Nút ---------- */
.apd-btn { display: inline-flex; align-items: center; gap: 7px; height: 38px; padding: 0 15px; border-radius: 9px;
    font: 600 14px/1 var(--apd-font); white-space: nowrap; cursor: pointer; border: 1px solid transparent;
    transition: background .15s, border-color .15s, color .15s, box-shadow .15s; }
.apd-btn:hover { text-decoration: none !important; }
.apd-btn svg { flex-shrink: 0; }
.apd-btn--primary { background: var(--apd-brand); color: #fff !important; box-shadow: 0 1px 2px rgba(11, 87, 183, .25); }
.apd-btn--primary:hover { background: #0947a0; }
.apd-btn--ghost { background: #fff; color: var(--apd-ink) !important; border-color: var(--apd-line); }
.apd-btn--ghost:hover { border-color: #cbd5e1; background: #f8fafc; }
.apd-btn--soft { background: #fff; color: var(--apd-ink) !important; border-color: var(--apd-line); height: 36px; font-size: 13.5px; }
.apd-btn--soft:hover { border-color: var(--apd-brand); color: var(--apd-brand) !important; }
.apd-btn--sm { height: 32px; padding: 0 12px; font-size: 13px; border-radius: 8px; }
.apd-btn:disabled { opacity: .6; cursor: default; }
.apd-icon-btn { display: inline-flex; align-items: center; justify-content: center; width: 30px; height: 30px; border-radius: 7px;
    border: 0; background: transparent; color: var(--apd-muted); cursor: pointer; }
.apd-icon-btn:hover { background: var(--apd-line-soft); color: var(--apd-ink); }
.apd-icon-btn--dark { color: #8b97ad; }
.apd-icon-btn--dark:hover { background: rgba(255, 255, 255, .08); color: #fff; }

/* ---------- Bố cục ---------- */
.apd-layout { display: grid; grid-template-columns: 264px minmax(0, 1fr); max-width: 1480px; margin: 0 auto; }
.apd-side { position: sticky; top: var(--apd-top-h); height: calc(100vh - var(--apd-top-h)); overflow-y: auto;
    border-right: 1px solid var(--apd-line); scrollbar-width: thin; }
.apd-side__inner { padding: 22px 16px 40px 20px; }
.apd-side__label { font-size: 11.5px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--apd-muted); margin-bottom: 8px; }
.apd-main { min-width: 0; padding: 32px 40px 60px; }

.apd-seg { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; background: #e9eef5; padding: 3px; border-radius: 10px; margin-bottom: 22px; }
.apd-seg button { border: 0; background: none; font: 600 13px/1 var(--apd-font); color: var(--apd-muted); padding: 8px 10px; border-radius: 8px; cursor: pointer; }
.apd-seg button.is-active { background: #fff; color: var(--apd-brand); box-shadow: 0 1px 3px rgba(15, 23, 42, .12); }

.apd-nav__group { font-size: 11.5px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--apd-muted); margin: 18px 0 6px 10px; }
.apd-nav__link { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 6px 10px; border-radius: 8px;
    color: var(--apd-text) !important; font-size: 14px; }
.apd-nav__link:hover { background: var(--apd-line-soft); text-decoration: none !important; }
.apd-nav__link.is-active { background: var(--apd-brand-soft); color: var(--apd-brand) !important; font-weight: 600; }
.apd-dot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: #f59e0b; flex-shrink: 0; }
.apd-dot--ok { background: var(--apd-ok); }
.apd-dot--err { background: var(--apd-err); }
.apd-scrim { display: none; }

/* ---------- Phần mở đầu ---------- */
.apd-hero { padding-bottom: 8px; }
.apd-eyebrow { font-size: 12.5px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--apd-brand); }
.apd-hero h1 { font-size: 34px; letter-spacing: -.02em; margin: 6px 0 12px; }
.apd-lead { font-size: 16.5px; color: var(--apd-text); margin: 0 0 20px; }
.apd-ai { display: flex; flex-wrap: wrap; gap: 8px; }
.apd-ai__hint { font-size: 13px; color: var(--apd-muted); margin: 8px 0 20px; }
.apd-note { background: var(--apd-warn-soft); border: 1px solid #fde2b8; color: #7c4a03; border-radius: 10px; padding: 11px 14px; font-size: 14px; margin-bottom: 18px; }

.apd-menu { position: relative; }
.apd-menu__list { position: absolute; left: 0; top: calc(100% + 6px); z-index: 20; min-width: 200px; padding: 6px; background: #fff;
    border: 1px solid var(--apd-line); border-radius: 12px; box-shadow: 0 12px 32px rgba(15, 23, 42, .14);
    opacity: 0; transform: translateY(-4px); pointer-events: none; transition: opacity .12s, transform .12s; }
.apd-menu.is-open .apd-menu__list { opacity: 1; transform: none; pointer-events: auto; }
.apd-menu__list a { display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-radius: 8px; color: var(--apd-ink) !important; font-size: 14px; }
.apd-menu__list a:hover { background: var(--apd-line-soft); text-decoration: none !important; }
.apd-menu__list a span { flex: 1; }
.apd-menu__list a svg { color: var(--apd-muted); }
.apd-menu__list i { width: 22px; height: 22px; border-radius: 6px; color: #fff; font: 700 12px/22px var(--apd-font); text-align: center; font-style: normal; }

.apd-endpoint { display: flex; align-items: center; gap: 10px; background: #fff; border: 1px solid var(--apd-line); border-radius: var(--apd-radius);
    padding: 10px 10px 10px 12px; margin-bottom: 14px; box-shadow: 0 1px 2px rgba(15, 23, 42, .04); }
.apd-endpoint code { flex: 1; background: none; padding: 0; font-size: 15px; color: var(--apd-ink); overflow-wrap: anywhere; }
.apd-method { display: inline-block; font: 700 12px/1 var(--apd-mono); color: var(--apd-ok); background: var(--apd-ok-soft);
    padding: 6px 8px; border-radius: 6px; letter-spacing: .03em; }
.apd-method--sm { font-size: 11px; padding: 4px 6px; }

.apd-facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 1px; background: var(--apd-line);
    border: 1px solid var(--apd-line); border-radius: var(--apd-radius); overflow: hidden; margin: 0; }
.apd-facts > div { background: #fff; padding: 12px 14px; }
.apd-facts dt { font-size: 12px; font-weight: 600; color: var(--apd-muted); text-transform: uppercase; letter-spacing: .04em; margin-bottom: 4px; }
.apd-facts dd { margin: 0; font-size: 14px; color: var(--apd-ink); }
.apd-facts dd a { display: inline-flex; align-items: center; gap: 4px; }
.apd-facts small { display: block; color: var(--apd-muted); font-size: 12.5px; margin-top: 2px; }
.apd-facts dd code { background: none; padding: 0; font-size: 13px; color: var(--apd-ink); overflow-wrap: anywhere; }

/* ---------- Mục chung ---------- */
.apd-section { padding-top: 44px; }
.apd-section h2 { font-size: 22px; margin-bottom: 10px; }
.apd-section > p { margin: 0 0 14px; }
.apd-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 12px; }
.apd-compare__col { background: #fff; border: 1px solid var(--apd-line); border-radius: var(--apd-radius); padding: 16px; }
.apd[data-version="v2"] [data-compare="v2"], .apd[data-version="v3"] [data-compare="v3"] { border-color: var(--apd-brand); box-shadow: 0 0 0 3px var(--apd-brand-soft); }
.apd-compare__head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.apd-compare__col p { margin: 0 0 8px; font-size: 14px; }
.apd-mini-label { font-size: 12px; font-weight: 600; color: var(--apd-muted); margin: 10px 0 6px; }

.apd-steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 12px; counter-reset: s; }
.apd-steps li { position: relative; background: #fff; border: 1px solid var(--apd-line); border-radius: var(--apd-radius); padding: 14px 14px 14px 50px; counter-increment: s; }
.apd-steps li::before { content: counter(s); position: absolute; left: 14px; top: 14px; width: 26px; height: 26px; border-radius: 50%;
    background: var(--apd-brand-soft); color: var(--apd-brand); font: 700 13px/26px var(--apd-font); text-align: center; }
.apd-steps b { display: block; margin-bottom: 2px; }
.apd-steps span { font-size: 13.5px; }

.apd-group-title { margin: 60px 0 0; padding-top: 14px; border-top: 1px solid var(--apd-line); font-size: 12.5px; font-weight: 700;
    letter-spacing: .08em; text-transform: uppercase; color: var(--apd-brand); }

/* ---------- Một action ---------- */
.apd-op { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 470px); gap: 32px; padding: 30px 0 34px; border-bottom: 1px solid var(--apd-line-soft); }
.apd-op__head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.apd-op__head h2 { font-size: 22px; }
.apd-op__meta { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin: 10px 0 12px; }
.apd-op__action { font-size: 13px !important; background: #eef2f7; }
.apd-op__summary { margin: 0 0 6px; }
.apd-op h3 { font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--apd-muted); margin: 24px 0 8px; }
.apd-op h3 code { text-transform: none; letter-spacing: 0; }
.apd-op__code { display: flex; flex-direction: column; gap: 14px; position: sticky; top: calc(var(--apd-top-h) + 16px); align-self: start; }

.apd-badge { font-size: 12px; font-weight: 600; padding: 3px 9px; border-radius: 999px; }
.apd-badge--ok { color: var(--apd-ok); background: var(--apd-ok-soft); }
.apd-badge--warn { color: var(--apd-warn); background: var(--apd-warn-soft); }

.apd-params { border-top: 1px solid var(--apd-line); }
.apd-param { padding: 12px 0; border-bottom: 1px solid var(--apd-line); }
.apd-param__name { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin-bottom: 3px; }
.apd-param__name code { background: none; padding: 0; font-size: 14px; font-weight: 600; color: var(--apd-ink); }
.apd-type { font: 12.5px/1 var(--apd-mono); color: var(--apd-muted); }
.apd-req { font-size: 11.5px; font-weight: 600; color: var(--apd-err); }
.apd-param__desc { font-size: 14px; }
.apd-values { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 6px; }
.apd-values code { background: #fff; border: 1px solid var(--apd-line); color: var(--apd-ink); font-size: 12.5px; }
.apd-values--lg code { font-size: 13.5px; padding: 4px 10px; }

.apd-variants { border: 1px solid var(--apd-line); border-radius: var(--apd-radius); overflow: hidden; background: #fff; }
.apd-variant { display: grid; grid-template-columns: 170px minmax(0, 1fr); border-bottom: 1px solid var(--apd-line); }
.apd-variant:last-child { border-bottom: 0; }
.apd-variant__type { padding: 12px 14px; font-weight: 600; font-size: 13.5px; color: var(--apd-ink); background: #fafbfd; border-right: 1px solid var(--apd-line); }
.apd-variant__params { padding: 4px 14px; }
.apd-variant__params > .apd-muted { display: block; padding: 8px 0; }
.apd-variant__param { padding: 8px 0; }
.apd-variant__param + .apd-variant__param { border-top: 1px dashed var(--apd-line); }

.apd-fields { margin: 0; border-top: 1px solid var(--apd-line); }
.apd-fields > div { display: grid; grid-template-columns: 190px minmax(0, 1fr); gap: 12px; padding: 9px 0; border-bottom: 1px solid var(--apd-line); font-size: 14px; }
.apd-fields dt code { background: none; padding: 0; font-weight: 600; color: var(--apd-ink); }
.apd-fields dd { margin: 0; }

/* ---------- Khối code / phản hồi ---------- */
.apd-panel { background: var(--apd-code-bg); border-radius: var(--apd-radius); overflow: hidden; box-shadow: 0 8px 24px rgba(15, 23, 42, .12); }
.apd-panel__bar { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 6px 8px 6px 6px; background: var(--apd-code-bar); }
.apd-tabs { display: flex; gap: 2px; overflow-x: auto; scrollbar-width: none; }
.apd-tabs button { border: 0; background: none; color: #8b97ad; font: 600 12.5px/1 var(--apd-font); padding: 8px 10px; border-radius: 7px; cursor: pointer; white-space: nowrap;
    display: inline-flex; align-items: center; gap: 6px; }
.apd-tabs button:hover { color: #fff; }
.apd-tabs button.is-active { background: rgba(255, 255, 255, .09); color: #fff; }
.apd-pane { margin: 0; padding: 14px 16px; max-height: 380px; overflow: auto; font: 12.8px/1.65 var(--apd-mono); color: var(--apd-code-ink); white-space: pre; tab-size: 2; }
.apd-pane code { background: none; color: inherit; padding: 0; font-size: inherit; }

.apd-panel--light { background: #fff; border: 1px solid var(--apd-line); box-shadow: none; }
.apd-panel--light .apd-panel__bar { background: #f8fafc; border-bottom: 1px solid var(--apd-line); }
.apd-tabs--light button { color: var(--apd-muted); }
.apd-tabs--light button:hover { color: var(--apd-ink); }
.apd-tabs--light button.is-active { background: #fff; color: var(--apd-ink); box-shadow: 0 1px 2px rgba(15, 23, 42, .1); }

.apd-json { color: #334155; }
.apd-json--sm { margin: 0; padding: 10px 12px; font: 12.5px/1.6 var(--apd-mono); background: #f8fafc; border: 1px solid var(--apd-line); border-radius: 8px; overflow: auto; white-space: pre; }
.apd-json .j-k { color: #0b57b7; }
.apd-json .j-s { color: #0f7b53; }
.apd-json .j-n { color: #b45309; }
.apd-json .j-l { color: #9333ea; }

.apd-foot { margin-top: 40px; font-size: 13px; color: var(--apd-muted); }

/* ---------- Thông báo nhỏ ---------- */
.apd-toast { position: fixed; left: 50%; bottom: 24px; z-index: 100; transform: translate(-50%, 16px); opacity: 0; pointer-events: none;
    background: var(--apd-ink); color: #fff; font-size: 14px; padding: 10px 16px; border-radius: 10px; box-shadow: 0 10px 30px rgba(15, 23, 42, .3);
    transition: opacity .18s, transform .18s; max-width: calc(100vw - 32px); }
.apd-toast.is-show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- Popup "Thử ngay" ---------- */
.apd-modal { position: fixed; inset: 0; z-index: 60; display: flex; align-items: flex-end; justify-content: center; background: rgba(15, 23, 42, .55);
    -webkit-backdrop-filter: blur(2px); backdrop-filter: blur(2px); }
.apd-modal__panel { width: 100%; max-width: 1400px; height: calc(100vh - 48px); background: #fff; border-radius: 16px 16px 0 0; display: flex; flex-direction: column;
    overflow: hidden; box-shadow: 0 -10px 40px rgba(15, 23, 42, .25); animation: apd-up .22s ease-out; }
@keyframes apd-up { from { transform: translateY(24px); opacity: .6; } to { transform: none; opacity: 1; } }
.apd-modal__head { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; padding: 12px 16px; border-bottom: 1px solid var(--apd-line); }
.apd-modal__title { display: flex; align-items: center; gap: 8px; min-width: 0; }
.apd-modal__title b { font-size: 15px; }
.apd-modal__title code { font-size: 13px; }
.apd-modal__pick { font: 600 14.5px/1.3 var(--apd-font); color: var(--apd-ink); background: #fff; border: 1px solid #d5dce6; border-radius: 8px;
    padding: 6px 30px 6px 10px; max-width: 320px; cursor: pointer; outline: none; }
.apd-modal__pick:hover { border-color: #b8c3d3; }
.apd-modal__pick:focus { border-color: var(--apd-brand); box-shadow: 0 0 0 3px var(--apd-brand-soft); }
.apd-modal--static .apd-modal__panel { animation: none; }
.apd-modal__head .apd-seg { margin: 0; min-width: 150px; }
.apd-modal__spacer { flex: 1; }
.apd-modal__notice { display: flex; gap: 8px; align-items: flex-start; padding: 9px 16px; font-size: 13.5px; border-bottom: 1px solid var(--apd-line); }
.apd-modal__notice--live { background: #eef6ff; color: #1e4f8f; }
.apd-modal__notice--mock { background: var(--apd-warn-soft); color: #7c4a03; }
.apd-modal__body { flex: 1; min-height: 0; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
.apd-req, .apd-res { display: flex; flex-direction: column; min-height: 0; }
.apd-req { border-right: 1px solid var(--apd-line); }
.apd-pane-head { display: flex; align-items: center; gap: 10px; padding: 10px 16px; border-bottom: 1px solid var(--apd-line); background: #fafbfd; min-height: 50px; }
.apd-pane-head b { font-size: 14px; }
.apd-req__form { flex: 1; overflow-y: auto; padding: 14px 16px 20px; }
.apd-req__foot { display: flex; gap: 8px; justify-content: flex-end; padding: 12px 16px; border-top: 1px solid var(--apd-line); background: #fafbfd; }

.apd-field { margin-bottom: 14px; }
.apd-field label { display: flex; align-items: center; gap: 8px; font-size: 13.5px; margin-bottom: 5px; }
.apd-field label code { background: none; padding: 0; font-weight: 600; color: var(--apd-ink); font-size: 13.5px; }
.apd-field input, .apd-field select, .apd-field textarea { width: 100%; font: 14px/1.4 var(--apd-font); color: var(--apd-ink); background: #fff;
    border: 1px solid #d5dce6; border-radius: 8px; padding: 8px 10px; outline: none; transition: border-color .15s, box-shadow .15s; }
.apd-field textarea { min-height: 76px; resize: vertical; font-family: var(--apd-mono); font-size: 13px; }
.apd-field input:focus, .apd-field select:focus, .apd-field textarea:focus { border-color: var(--apd-brand); box-shadow: 0 0 0 3px var(--apd-brand-soft); }
.apd-field input[readonly] { background: #f4f6f9; color: var(--apd-muted); }
.apd-field__hint { font-size: 12.5px; font-weight: 400; color: var(--apd-muted); margin-top: 4px; }
.apd-field.is-invalid input, .apd-field.is-invalid select, .apd-field.is-invalid textarea { border-color: var(--apd-err); }
.apd-field--variant { background: var(--apd-brand-soft); border-radius: 10px; padding: 10px 12px; }
.apd-sub { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--apd-muted); margin: 18px 0 10px; }
.apd-preview { margin: 0; padding: 10px 12px; background: #f8fafc; border: 1px solid var(--apd-line); border-radius: 8px;
    font: 12.5px/1.6 var(--apd-mono); white-space: pre-wrap; word-break: break-all; color: var(--apd-text); }

.apd-res__body { flex: 1; min-height: 0; overflow: auto; }
.apd-res__body pre { margin: 0; padding: 14px 16px; font: 13px/1.65 var(--apd-mono); white-space: pre-wrap; word-break: break-word; }
.apd-empty { height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; color: var(--apd-muted); font-size: 14px; text-align: center; padding: 20px; }
.apd-empty svg { color: #b6c0cf; }
.apd-status { font: 700 12px/1 var(--apd-mono); padding: 5px 8px; border-radius: 6px; }
.apd-status--ok { color: var(--apd-ok); background: var(--apd-ok-soft); }
.apd-status--err { color: var(--apd-err); background: #fdecec; }
.apd-status--warn { color: var(--apd-warn); background: var(--apd-warn-soft); }
.apd-pane-head .apd-muted { font-size: 12.5px; }
.apd-spin { width: 16px; height: 16px; border: 2px solid rgba(255, 255, 255, .5); border-top-color: #fff; border-radius: 50%; animation: apd-spin .7s linear infinite; }
@keyframes apd-spin { to { transform: rotate(360deg); } }
body.apd-lock { overflow: hidden; }

/* ---------- Màn hình vừa ---------- */
@media (max-width: 1279.98px) {
    .apd-op { grid-template-columns: minmax(0, 1fr); gap: 18px; }
    .apd-op__code { position: static; }
}

@media (max-width: 991.98px) {
    .apd-layout { grid-template-columns: minmax(0, 1fr); }
    .apd-top__menu { display: inline-flex; }
    .apd-side { position: fixed; top: var(--apd-top-h); left: 0; bottom: 0; height: auto; width: 290px; max-width: 85vw; z-index: 40; background: #fff;
        transform: translateX(-100%); transition: transform .2s ease; box-shadow: 0 10px 40px rgba(15, 23, 42, .2); }
    .apd-nav-open .apd-side { transform: none; }
    .apd-nav-open .apd-scrim { display: block; position: fixed; inset: var(--apd-top-h) 0 0 0; z-index: 35; background: rgba(15, 23, 42, .35); }
    .apd-main { padding: 24px 20px 50px; }
    /* Một cột cuộn liền: form rồi tới kết quả, nút gửi dính ở đáy vùng cuộn. */
    .apd-modal__body { display: block; overflow-y: auto; }
    .apd-req, .apd-res { display: block; }
    .apd-req { border-right: 0; border-bottom: 1px solid var(--apd-line); }
    .apd-req__form { overflow: visible; }
    .apd-req__foot { position: sticky; bottom: 0; z-index: 1; }
    .apd-res__body { min-height: 220px; overflow: visible; }
}

@media (max-width: 575.98px) {
    body.apd { font-size: 14.5px; }
    .apd-top { padding: 0 12px; gap: 6px; }
    .apd-top__brand span, .apd-top__tag, .apd-hide-sm { display: none; }
    .apd-top .apd-btn { height: 34px; padding: 0 11px; font-size: 13px; }
    .apd-main { padding: 20px 14px 40px; }
    .apd-hero h1 { font-size: 27px; }
    .apd-lead { font-size: 15px; }
    .apd-compare { grid-template-columns: minmax(0, 1fr); }
    .apd-variant { grid-template-columns: minmax(0, 1fr); }
    .apd-variant__type { border-right: 0; border-bottom: 1px solid var(--apd-line); padding: 8px 14px; }
    .apd-fields > div { grid-template-columns: minmax(0, 1fr); gap: 2px; }
    .apd-op__head { flex-wrap: wrap; }
    .apd-modal__panel { height: calc(100vh - 12px); border-radius: 14px 14px 0 0; }
    .apd-modal__title code { display: none; }
    /* Dòng 1: ô chọn API + nút đóng; dòng 2: phiên bản + chế độ. */
    .apd-modal__head > * { order: 1; }
    .apd-modal__head > .apd-modal__title, .apd-modal__head > [data-modal-close] { order: 0; }
    .apd-modal__title { flex: 1 1 calc(100% - 50px); }
    .apd-modal__pick { max-width: none; flex: 1; min-width: 0; }
}