/* Trang bố mẹ con.petos.vn. Cùng bảng màu với trang giới thiệu (trang-chu.css). */
:root {
  --bg: #fff7ec;
  --bg2: #ffe9ef;
  --card: #ffffff;
  --sunk: #fbf4f0;
  --text: #3a2e39;
  --muted: #7d6d7b;
  --line: #f1e3e6;
  --brand: #ff6f8e;
  --brand-ink: #e0486d;
  --brand-soft: #ffe1e8;
  --ok: #2f9e5b;
  --ok-soft: #e3f6ea;
  --warn: #c2410c;
  --warn-soft: #fff0e6;
  --danger: #d32f2f;
  --shadow: 0 1px 2px rgba(90, 40, 60, .05), 0 4px 16px rgba(90, 40, 60, .06);
  --shadow-lg: 0 18px 50px rgba(120, 40, 70, .16);
  --radius: 20px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1d1719; --bg2: #2a1f24; --card: #272023; --sunk: #211a1d; --text: #f6ecef; --muted: #b8a7ad; --line: #3b3035;
    --brand: #ff8fa3; --brand-ink: #ffb0c0; --brand-soft: #4a2c35; --ok: #5fd08d; --ok-soft: #1f3a2b; --warn: #ffab70; --warn-soft: #43301f;
    --danger: #ff7a7a; --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 4px 16px rgba(0, 0, 0, .25); --shadow-lg: 0 18px 50px rgba(0, 0, 0, .5);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #1d1719; --bg2: #2a1f24; --card: #272023; --sunk: #211a1d; --text: #f6ecef; --muted: #b8a7ad; --line: #3b3035;
  --brand: #ff8fa3; --brand-ink: #ffb0c0; --brand-soft: #4a2c35; --ok: #5fd08d; --ok-soft: #1f3a2b; --warn: #ffab70; --warn-soft: #43301f;
  --danger: #ff7a7a; --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 4px 16px rgba(0, 0, 0, .25); --shadow-lg: 0 18px 50px rgba(0, 0, 0, .5);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font-family: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--text);
  background: radial-gradient(120% 60% at 100% 0%, var(--bg2) 0%, var(--bg) 55%) fixed, var(--bg);
  min-height: 100vh; line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
#app { max-width: 760px; margin: 0 auto; padding: 0 16px calc(40px + env(safe-area-inset-bottom)); }
#app.wide { max-width: 1160px; }
@media (min-width: 720px) { #app { padding-left: 24px; padding-right: 24px; } }
a { color: var(--brand-ink); }
h1, h2, h3 { margin: 0; line-height: 1.25; letter-spacing: -.01em; }
h1 { font-size: 26px; font-weight: 800; }
h2 { font-size: 19px; font-weight: 800; }
h3 { font-size: 16px; font-weight: 700; }
p { line-height: 1.55; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
:focus-visible { outline: 3px solid var(--brand); outline-offset: 2px; }

.splash { display: grid; place-items: center; min-height: 80vh; font-weight: 700; font-size: 20px; }
.splash img { animation: bob 1.4s ease-in-out infinite; border-radius: 20px; }
@keyframes bob { 50% { transform: translateY(-6px); } }

/* thanh trên */
.top {
  display: flex; align-items: center; gap: 12px; padding: 14px 0 12px; margin-bottom: 4px;
  position: sticky; top: 0; z-index: 5;
  background: color-mix(in srgb, var(--bg) 86%, transparent); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
}
.top .title { flex: 1; min-width: 0; }
.top .title h1 { font-size: 21px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.top .title .sub { font-size: 12px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.icon-btn {
  border: 1px solid var(--line); background: var(--card); color: var(--text); width: 42px; height: 42px; border-radius: 13px;
  box-shadow: var(--shadow); font-size: 18px; cursor: pointer; display: grid; place-items: center; flex: none;
}
.icon-btn:hover { border-color: var(--brand); }
.logo { width: 38px; height: 38px; border-radius: 11px; flex: none; }
.top-btn { background: var(--card); box-shadow: var(--shadow); }
@media (max-width: 420px) { .top-btn { padding: 8px 12px; } }
.kid-switch { width: auto; max-width: 140px; min-height: 40px; padding: 6px 10px; font-size: 14px; background: var(--card); }

/* thẻ */
.card { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); border: 1px solid var(--line); padding: 18px; margin: 12px 0; }
.card.flat { box-shadow: none; background: var(--sunk); }
.row { display: flex; align-items: center; gap: 12px; }
.grow { flex: 1; min-width: 0; }
.stack > * + * { margin-top: 10px; }
.section-title { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin: 24px 2px 8px; }
.section-title h2 { font-size: 17px; }

/* nút */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 0; cursor: pointer;
  font: inherit; font-weight: 700; font-size: 15px; padding: 10px 18px; border-radius: 14px;
  background: var(--brand); color: #fff; min-height: 44px; text-decoration: none;
  transition: transform .12s, box-shadow .12s, background .12s, border-color .12s;
}
.btn:hover { box-shadow: 0 6px 16px color-mix(in srgb, var(--brand) 30%, transparent); }
.btn:active { transform: translateY(1px); }
.btn.secondary { background: var(--brand-soft); color: var(--text); }
.btn.secondary:hover { box-shadow: none; background: color-mix(in srgb, var(--brand) 22%, var(--brand-soft)); }
.btn.ghost { background: transparent; color: var(--text); border: 1px solid var(--line); }
.btn.ghost:hover { box-shadow: none; border-color: var(--brand); }
.btn.danger { background: transparent; color: var(--danger); border: 1px solid color-mix(in srgb, var(--danger) 40%, transparent); }
.btn.danger:hover { box-shadow: none; background: color-mix(in srgb, var(--danger) 8%, transparent); }
.btn.block { width: 100%; }
.btn:disabled, .btn[aria-disabled="true"] { opacity: .5; cursor: default; pointer-events: none; }

/* ô nhập */
label.field { display: block; margin: 12px 0; }
label.field > span { display: block; font-size: 13px; font-weight: 600; color: var(--muted); margin-bottom: 5px; }
input[type=text], input[type=search], input[type=tel], input[type=number], input[type=email], input[type=password], input[type=time], input[type=date], select, textarea {
  width: 100%; font: inherit; font-size: 16px; color: var(--text); background: var(--sunk);
  border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; min-height: 44px;
  transition: border-color .12s, background .12s;
}
input:hover, select:hover, textarea:hover { border-color: color-mix(in srgb, var(--brand) 40%, var(--line)); }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--brand); background: var(--card); box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand) 22%, transparent); }
.check { display: flex; gap: 10px; align-items: flex-start; margin: 12px 0; line-height: 1.45; }
.check input { width: 22px; height: 22px; flex: none; accent-color: var(--brand); margin-top: 1px; }

/* nhãn */
.avatar {
  width: 52px; height: 52px; border-radius: 16px; display: grid; place-items: center; font-size: 26px; flex: none;
  background: var(--brand-soft);
}
.kid-av { background: var(--av, var(--brand)); color: #fff; font-weight: 800; font-size: 22px; box-shadow: inset 0 -3px 0 rgba(0, 0, 0, .08); }
.kid-av.lg { width: 56px; height: 56px; font-size: 24px; border-radius: 18px; }
.badge { display: inline-block; font-size: 12px; font-weight: 700; padding: 3px 10px; border-radius: 999px; background: var(--brand-soft); }
.badge.ok { background: var(--ok-soft); color: var(--ok); }
.badge.ok::before { content: ""; display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: currentColor; margin-right: 6px; vertical-align: 1px; }
.badge.warn { background: var(--warn-soft); color: var(--warn); }

/* trang chính */
.home { display: grid; gap: 0 28px; }
@media (min-width: 980px) { .home { grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); align-items: start; }
  .home-side { position: sticky; top: 84px; } }
.kids { display: grid; gap: 14px; margin-top: 4px; }
@media (min-width: 640px) { .kids { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); } }
.kid { cursor: pointer; margin: 0; display: flex; flex-direction: column; gap: 14px; transition: border-color .12s, box-shadow .12s, transform .12s; }
.kid:hover { border-color: color-mix(in srgb, var(--brand) 45%, var(--line)); box-shadow: var(--shadow-lg); }
.kid-head { display: flex; align-items: center; gap: 14px; }
.kid-head h2 { font-size: 20px; overflow-wrap: anywhere; }
.chev { font-size: 26px; color: var(--muted); line-height: 1; }
.map-link { display: block; text-decoration: none; color: var(--muted); }
.map-cap { font-size: 12.5px; margin-top: 6px; }
.quick { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; border-top: 1px solid var(--line); padding-top: 12px; }
.quick-btn {
  font: inherit; font-size: 12px; font-weight: 600; color: var(--text); background: var(--sunk); border: 1px solid transparent;
  border-radius: 12px; padding: 8px 2px; cursor: pointer; display: grid; justify-items: center; gap: 2px; min-height: 52px;
}
.quick-btn span { font-size: 18px; }
.quick-btn:hover { border-color: var(--brand); background: var(--card); }
.feed { padding-top: 6px; padding-bottom: 6px; }

/* trang từng bé */
.kid-banner { display: flex; align-items: center; gap: 14px; margin: 10px 0 14px; }
.child-layout { display: grid; gap: 4px; }
.child-main { min-width: 0; }
.tab-title { display: none; }
@media (min-width: 960px) {
  .child-layout { grid-template-columns: 220px minmax(0, 1fr); gap: 32px; align-items: start; }
  .child-main { max-width: 820px; }
  .tab-title { display: block; font-size: 24px; margin: 6px 2px 4px; }
}

/* tab: điện thoại là thanh trượt ngang, máy tính là cột bên trái có nhóm */
.tabs { display: flex; gap: 6px; overflow-x: auto; padding: 4px 2px 8px; margin: 0 -2px; scrollbar-width: none; }
.tabs::-webkit-scrollbar { display: none; }
.tab-group { display: none; }
.tab {
  flex: none; display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--line); font: inherit; font-weight: 600;
  font-size: 14px; padding: 8px 14px; border-radius: 999px; background: var(--card); color: var(--muted); cursor: pointer; min-height: 40px;
}
.tab:hover { color: var(--text); border-color: color-mix(in srgb, var(--brand) 40%, var(--line)); }
.tab[aria-selected="true"] { background: var(--brand); border-color: var(--brand); color: #fff; }
.tab-ico { font-size: 15px; }
@media (min-width: 960px) {
  .child-layout > .tabs {
    flex-direction: column; gap: 2px; overflow-y: auto; max-height: calc(100vh - 100px); position: sticky; top: 84px; padding: 10px; margin: 0;
    background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
  }
  .tab-group { display: block; font-size: 11px; font-weight: 800; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); padding: 12px 10px 4px; }
  .tab-group:first-child { padding-top: 4px; }
  .child-layout > .tabs .tab { border: 0; border-radius: 12px; background: transparent; padding: 8px 10px; width: 100%; font-size: 15px; }
  .child-layout > .tabs .tab:hover { background: var(--sunk); }
  .child-layout > .tabs .tab[aria-selected="true"] { background: var(--brand-soft); color: var(--brand-ink); }
}

/* nhật ký */
.event { display: flex; gap: 12px; padding: 12px 0; align-items: flex-start; border-bottom: 1px solid var(--line); }
.event:last-child { border-bottom: 0; }
.event .ico { font-size: 18px; width: 36px; height: 36px; border-radius: 11px; background: var(--sunk); display: grid; place-items: center; flex: none; }
.event.alert .ico { background: var(--warn-soft); }
.event .t { font-weight: 600; overflow-wrap: anywhere; }
.event .d { color: var(--muted); font-size: 14px; overflow-wrap: anywhere; margin-top: 2px; }
.event .when { color: var(--muted); font-size: 12px; margin-top: 4px; }
.event.alert .t { color: var(--warn); }

/* chat */
.days { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 6px; }
.days .tab { box-shadow: none; border: 1px solid var(--line); }
.chat { display: flex; flex-direction: column; gap: 8px; }
.bubble { max-width: 82%; padding: 10px 14px; border-radius: 18px; line-height: 1.45; overflow-wrap: anywhere; }
.bubble.user { align-self: flex-end; background: var(--brand); color: #fff; border-bottom-right-radius: 6px; }
.bubble.assistant { align-self: flex-start; background: var(--bg2); border-bottom-left-radius: 6px; }
.bubble .time { display: block; font-size: 11px; opacity: .7; margin-top: 3px; }
/* Thú ảo AI: nhãn bài tập / cảnh báo trên từng lượt (tab Trò chuyện) */
.bubble .badges { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 6px; }
.bubble .badge { color: var(--text, inherit); }
.bubble.user .badge { background: rgba(255, 255, 255, .9); color: #333; }
.badge.danger { background: var(--danger); color: #fff !important; }
.bubble.alert { outline: 3px solid var(--danger); outline-offset: 1px; }

/* danh sách chỉnh sửa */
.list-item { display: flex; align-items: center; gap: 10px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.list-item:last-child { border-bottom: 0; }
.switch { position: relative; width: 48px; height: 28px; flex: none; }
.switch input { opacity: 0; width: 0; height: 0; }
.switch span { position: absolute; inset: 0; background: var(--line); border-radius: 999px; transition: .2s; cursor: pointer; }
.switch span::before { content: ""; position: absolute; width: 22px; height: 22px; left: 3px; top: 3px; background: #fff; border-radius: 50%; transition: .2s; box-shadow: 0 1px 3px rgba(0,0,0,.2); }
.switch input:checked + span { background: var(--ok); }
.switch input:checked + span::before { transform: translateX(20px); }
.switch input:focus-visible + span { outline: 2px solid var(--brand); outline-offset: 2px; }

.notice { border-radius: 14px; padding: 12px 14px; background: var(--warn-soft); color: var(--text); line-height: 1.5; }
.notice.ok { background: var(--ok-soft); }
.empty { text-align: center; color: var(--muted); padding: 26px 10px; }
.empty .big { font-size: 40px; display: block; margin-bottom: 6px; }

/* đăng nhập */
.hero { text-align: center; padding: 48px 4px 4px; }
.hero img { width: 88px; height: 88px; border-radius: 26px; box-shadow: var(--shadow-lg); }
.hero h1 { font-size: 30px; margin-top: 16px; }
.hero p { color: var(--muted); font-size: 16px; margin: 6px 0 0; }
.features { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 10px; margin: 24px 0; }
.feature { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 14px; box-shadow: var(--shadow); font-size: 14px; display: flex; gap: 10px; align-items: flex-start; }
.feature b { font-size: 20px; line-height: 1.2; flex: none; }
.login-card { padding: 22px; }
.login-card h2 { margin-bottom: 4px; }
#gbtn { display: flex; justify-content: center; min-height: 44px; margin: 10px 0; }
#gbtn.locked { opacity: .35; pointer-events: none; filter: grayscale(1); }

/* thẻ Cài đặt ở trang chính */
.install { display: flex; align-items: center; gap: 14px; border: 2px dashed color-mix(in srgb, var(--brand) 50%, var(--line)); box-shadow: none; background: color-mix(in srgb, var(--brand-soft) 45%, var(--card)); margin-top: 16px; }
.install.done { border-color: var(--line); background: var(--card); }
.install p { margin: 2px 0 0; }
.install-ico { font-size: 28px; width: 52px; height: 52px; border-radius: 16px; background: var(--brand-soft); display: grid; place-items: center; flex: none; }
@media (max-width: 420px) { .install { flex-wrap: wrap; } .install .btn { width: 100%; } }

/* hướng dẫn cài đặt: mỗi bước vừa một màn hình. Trang cao đúng bằng cửa sổ (body.setup-page), slide chiếm phần còn lại,
   hình tự co (fitArt trong app.js), chữ dài quá thì chỉ phần chữ cuộn bên trong. */
body.setup-page { min-height: 0; }
body.setup-page #app { height: 100dvh; min-height: 540px; display: flex; flex-direction: column; padding-bottom: 0; }
body.setup-page .top { position: static; padding: 10px 0 8px; margin: 0; }
body.setup-page #ma-bo-me .card { margin: 6px 0; padding: 10px 14px; }
body.setup-page #ma-bo-me .code { font-size: 32px; }
.setup { display: grid; flex: 1; min-height: 0; }
.setup-main { min-width: 0; min-height: 0; display: flex; flex-direction: column; }
.setup-list { display: none; }
@media (min-width: 960px) {
  .setup { grid-template-columns: 240px minmax(0, 1fr); gap: 28px; }
  .setup-list {
    display: block; overflow-y: auto; margin: 10px 0 14px; padding: 12px;
    background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
  }
  .phase-bar .pb-text { display: none; }
}
.sl-phase + .sl-phase { margin-top: 4px; }
.sl-head { display: flex; align-items: center; gap: 10px; font-size: 14px; font-weight: 800; padding: 5px 4px; color: var(--muted); width: 100%; }
button.sl-head { font: inherit; font-size: 14px; font-weight: 800; background: none; border: 0; border-radius: 9px; cursor: pointer; text-align: left; }
button.sl-head:hover { background: var(--sunk); }
.sl-num { width: 24px; height: 24px; flex: none; border-radius: 50%; display: grid; place-items: center; font-size: 12px; background: var(--sunk); border: 1px solid var(--line); }
.sl-phase.now .sl-head { color: var(--text); }
.sl-phase.now .sl-num { background: var(--brand); border-color: var(--brand); color: #fff; }
.sl-phase.past .sl-num { background: var(--ok); border-color: var(--ok); color: #fff; }
.sl-phase ol { list-style: none; margin: 0 0 2px 15px; padding: 0 0 0 12px; border-left: 2px solid var(--line); }
.sl-phase.past ol { border-left-color: color-mix(in srgb, var(--ok) 45%, var(--line)); }
.sl-step {
  display: block; width: 100%; text-align: left; font: inherit; font-size: 13.5px; color: var(--muted); background: none; border: 0;
  padding: 5px 8px; border-radius: 9px; cursor: pointer; line-height: 1.35;
}
.sl-step:hover { background: var(--sunk); color: var(--text); }
.sl-step.past { color: var(--text); }
.sl-step.past::after { content: " ✓"; color: var(--ok); font-weight: 800; }
.sl-step.now { background: var(--brand-soft); color: var(--brand-ink); font-weight: 700; }

.phase-bar { margin: 6px 0 0; flex: none; }
.pb-text { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; margin-bottom: 6px; }
.pb-text b { font-size: 15px; }
.pb-text span { font-size: 13px; color: var(--muted); font-weight: 600; }
.progress { display: flex; gap: 5px; margin: 4px 0 2px; }
.progress .dot { flex: 1; height: 6px; border: 0; padding: 0; border-radius: 3px; background: var(--line); cursor: pointer; }
.progress .dot.past { background: color-mix(in srgb, var(--ok) 70%, var(--line)); }
.progress .dot.now { background: var(--brand); }

/* slide: điện thoại xếp dọc (hình trên, chữ dưới), máy rộng xếp ngang (hình trái, chữ phải) */
.slide {
  flex: 1; min-height: 0; margin: 10px 0; padding: 0; overflow: hidden; animation: slide-in .25s ease-out;
  display: grid; grid-template-rows: clamp(150px, 32dvh, 300px) minmax(0, 1fr);
}
.slide.no-art { grid-template-rows: minmax(0, 1fr); }
@keyframes slide-in { from { opacity: 0; transform: translateX(14px); } }
.slide-art {
  display: grid; place-items: center; overflow: hidden; min-height: 0; padding: 8px;
  background: radial-gradient(120% 90% at 50% 0%, var(--bg2), color-mix(in srgb, var(--bg2) 40%, var(--card)));
  border-bottom: 1px solid var(--line);
}
.art-fit { width: max-content; }
.slide-body { padding: 16px 18px; min-width: 0; min-height: 0; overflow-y: auto; overscroll-behavior: contain; }
@media (min-width: 720px) {
  .slide { grid-template-rows: minmax(0, 1fr); grid-template-columns: minmax(0, .85fr) minmax(0, 1fr); }
  .slide.wide { grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); }
  .slide.no-art { grid-template-columns: minmax(0, 1fr); }
  .slide-art { border-bottom: 0; border-right: 1px solid var(--line); padding: 16px; }
  .slide-body { padding: 24px 26px; align-self: stretch; }
}
@media (max-height: 760px) and (min-width: 720px) { .slide-body { padding: 18px 22px; } }
.slide-step { margin: 0; font-size: 12px; font-weight: 800; color: var(--brand-ink); text-transform: uppercase; letter-spacing: .06em; }
@media (max-width: 959px) { .slide-step { display: none; } }
.slide-body h2 { font-size: clamp(20px, 2.4vw, 25px); font-weight: 800; margin-top: 4px; letter-spacing: -.015em; }
.slide-lead { margin: 8px 0 0; font-size: 15.5px; color: var(--muted); }
.slide-points { list-style: none; counter-reset: pt; padding: 0; margin: 12px 0 0; display: grid; gap: 8px; line-height: 1.45; font-size: 15px; }
.slide-points li { counter-increment: pt; position: relative; padding: 0 0 0 34px; min-height: 24px; }
.slide-points li::before {
  content: counter(pt); position: absolute; left: 0; top: -1px; width: 24px; height: 24px; border-radius: 50%;
  background: var(--brand-soft); color: var(--brand-ink); font-weight: 800; font-size: 12.5px; display: grid; place-items: center;
}
.slide.done .slide-points li::before { content: "✓"; background: var(--ok-soft); color: var(--ok); }
.slide-tip { display: flex; gap: 8px; align-items: flex-start; margin: 12px 0 0; padding: 9px 12px; border-radius: 12px; background: var(--sunk); border: 1px solid var(--line); font-size: 14px; line-height: 1.45; }
.slide-tip p { margin: 0; }
.slide-tip .tip-ico { flex: none; }
.slide-tip.warn { background: var(--warn-soft); border-color: transparent; }
.slide-more, .slide-how { margin-top: 10px; font-size: 14px; }
.slide-more summary, .slide-how summary { cursor: pointer; font-weight: 700; color: var(--brand-ink); padding: 4px 0; list-style-position: inside; }
.slide-more p { margin: 4px 0 0; color: var(--muted); line-height: 1.5; }
.slide-how { margin-top: 12px; }
.slide-how .slide-points { margin-top: 8px; }

/* bước cắm cáp: chữ bên trái, khung cài bên phải; điện thoại xếp dọc và cuộn chung */
.slide.tool { display: block; overflow-y: auto; }
.slide.tool .slide-body { overflow: visible; }
.slide-pane { padding: 0 18px 18px; min-width: 0; }
.slide-pane .usb-tool, .slide-pane .dev-status { margin-top: 0; }
@media (min-width: 720px) {
  .slide.tool { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); overflow: hidden; }
  .slide.tool .slide-body { overflow-y: auto; }
  .slide-pane { padding: 20px; overflow-y: auto; border-left: 1px solid var(--line); background: color-mix(in srgb, var(--brand-soft) 25%, var(--card)); }
  .slide-pane .usb-tool { border: 0; padding: 0; background: none; }
}

.slide-nav { display: flex; justify-content: space-between; gap: 10px; flex: none; padding: 0 0 calc(12px + env(safe-area-inset-bottom)); }
.slide-nav .btn:last-child { flex: 1; max-width: 360px; margin-left: auto; }
/* bước cắm cáp chưa cài xong: nút đi tiếp mờ, dòng nhắc ngay trên */
.slide-nav .btn.locked { opacity: .45; box-shadow: none; cursor: not-allowed; }
.sl-step.locked, .progress .dot.locked { opacity: .45; cursor: not-allowed; }
.nav-hint { flex: none; margin: 0 0 8px; text-align: right; font-size: 14px; font-weight: 700; color: var(--warn); }
@media (max-width: 719px) { .nav-hint { text-align: center; font-size: 13px; margin-bottom: 6px; } }
@media (max-width: 719px) {
  body.setup-page .top .sub { display: none; }
  body.setup-page .top .title h1 { font-size: 18px; }
  body.setup-page .icon-btn { width: 38px; height: 38px; }
  .slide { grid-template-rows: clamp(120px, 27dvh, 260px) minmax(0, 1fr); margin: 8px 0; }
  .slide.decor { grid-template-rows: minmax(0, 1fr); }
  .slide.decor .slide-art { display: none; }
  .slide-body { padding: 12px 14px; }
  .slide-body h2 { font-size: 19px; }
  .slide-lead { font-size: 14.5px; margin-top: 6px; }
  .slide-points { font-size: 14.5px; gap: 6px; margin-top: 10px; }
  .slide-tip { font-size: 13.5px; padding: 8px 10px; margin-top: 10px; }
  .slide-more, .slide-how { font-size: 13.5px; margin-top: 8px; }
  .slide-pane { padding: 0 14px 14px; }
  .slide-pane .usb-tool { padding: 14px; }
  .slide-pane .usb-stages { grid-template-columns: 1fr 1fr; gap: 6px 10px; font-size: 14px; }
  .slide-pane .usb-stages li::before { width: 22px; height: 22px; }
  .slide-pane .usb-status { margin-top: 10px; padding: 10px 12px; font-size: 14px; min-height: 0; }
  .slide-pane .usb-actions { margin-top: 10px; }
  .slide-pane .usb-fine { font-size: 12px; margin-top: 10px; }
  .slide-nav { padding-bottom: calc(8px + env(safe-area-inset-bottom)); }
}
.wait { margin-top: 12px; }
/* đang cài qua cáp: nút chuyển bước mờ đi (bấm vẫn được, hiện thông báo vì sao chưa chuyển) */
.setup-busy .slide-nav .btn, .setup-busy .progress .dot, .setup-busy .top .icon-btn, .setup-busy .sl-step, .setup-busy button.sl-head { opacity: .4; cursor: not-allowed; }
/* bước đầu hướng dẫn cài đặt: máy đang mở trang cài được không (thiet-bi.js) */
.dev-status { margin-top: 12px; padding: 12px 14px; border-radius: 14px; font-size: 14px; line-height: 1.5; background: var(--sunk); border: 1px solid var(--line); }
.dev-status.ok { background: var(--ok-soft); border-color: transparent; }
.dev-status.warn { background: var(--warn-soft); border-color: transparent; }
.dev-status p { margin: 0; }
.dev-btns { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.usb-tool { margin-top: 16px; padding: 18px; border-radius: 18px; border: 2px solid var(--brand); background: color-mix(in srgb, var(--brand-soft) 30%, var(--card)); }
/* màn hình chính PetOS trong hình bước cuối */
.ph-tiles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px 4px; padding: 10px 2px 0; }
.ph-tiles span { display: grid; justify-items: center; gap: 3px; font-size: 10.5px; font-weight: 600; }
.ph-tiles i { font-style: normal; width: 44px; height: 44px; border-radius: 14px; background: #fff; display: grid; place-items: center; font-size: 20px; box-shadow: 0 2px 6px rgba(0, 0, 0, .08); }
.ph-pet { margin-top: auto; display: flex; align-items: flex-end; gap: 6px; }
.ph-pet img { width: 62px; height: 62px; border-radius: 18px; flex: none; animation: bob 2.4s ease-in-out infinite; }
.ph-say { flex: 1; background: #fff; border-radius: 12px 12px 4px 12px; padding: 8px 10px; font-size: 11px; box-shadow: 0 2px 8px rgba(0, 0, 0, .08); margin-bottom: 30px; }

/* hình minh hoạ: điện thoại Android giả, luôn sáng như màn hình thật */
.ph { width: 230px; max-width: 100%; border-radius: 32px; background: #2b2229; padding: 8px; box-shadow: 0 14px 34px rgba(60, 20, 40, .25); }
.ph-screen {
  position: relative; overflow: hidden; height: 400px; border-radius: 25px; background: #f6f5f8; color: #1f1a1e;
  padding: 8px 12px 12px; font-size: 13px; line-height: 1.35; display: flex; flex-direction: column; gap: 4px;
}
.ph-status { display: flex; justify-content: space-between; font-size: 10px; font-weight: 600; color: #555; padding: 0 4px 6px; }
.ph-h { font-size: 17px; font-weight: 700; padding: 4px 2px 8px; display: flex; align-items: center; gap: 6px; }
.ph-back { font-size: 22px; line-height: 1; color: #666; }
.ph-row { position: relative; display: flex; align-items: center; justify-content: space-between; gap: 8px; background: #fff; border-radius: 14px; padding: 10px 12px; }
.ph-row > div { display: flex; align-items: center; gap: 8px; min-width: 0; }
.ph-row small { display: block; color: #777; font-size: 11px; }
.ph-row.hl { outline: 2px solid #ff6f8e; background: #fff0f3; }
.ph-row.dim { opacity: .5; }
.ph-ico { font-size: 16px; }
.ph-tog { width: 34px; height: 20px; border-radius: 10px; background: #c9c4c8; position: relative; flex: none; }
.ph-tog::after { content: ""; position: absolute; width: 16px; height: 16px; border-radius: 50%; background: #fff; top: 2px; left: 2px; }
.ph-tog.on { background: #2f9e5b; }
.ph-tog.on::after { left: 16px; }
.ph-tap { position: absolute; right: 8px; bottom: -10px; font-size: 24px; display: flex; align-items: center; gap: 2px; animation: tap 1s ease-in-out infinite; }
.ph-tap b { font-size: 12px; background: #ff6f8e; color: #fff; border-radius: 999px; padding: 1px 7px; }
@keyframes tap { 50% { transform: translateY(-5px) scale(.94); } }
.ph-toast { position: absolute; left: 50%; bottom: 18px; transform: translateX(-50%); width: max-content; max-width: 88%; text-align: center; background: #333; color: #fff; border-radius: 14px; padding: 7px 12px; font-size: 11px; }
.ph-btn { flex: 1; white-space: nowrap; text-align: center; font-weight: 700; padding: 9px 10px; border-radius: 999px; background: #ff6f8e; color: #fff; }
.ph-btn.ghost { background: transparent; color: #444; }
.ph-btn.pulse { animation: pulse 1.4s ease-in-out infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 6px rgba(255, 111, 142, .3); } }
.ph-foot { margin-top: auto; display: flex; }
.ph-dim { position: absolute; inset: 0; background: rgba(0, 0, 0, .35); display: flex; align-items: flex-end; padding: 10px; }
.ph-dialog { width: 100%; background: #fff; border-radius: 20px; padding: 16px 14px 12px; text-align: center; }
.ph-dialog b { font-size: 14px; }
.ph-dialog p { margin: 4px 0 0; color: #666; font-size: 12px; }
.ph-dbtns { display: flex; gap: 6px; margin-top: 12px; }
.ph-code { flex: 1; font-size: 26px; font-weight: 800; letter-spacing: .08em; color: #1f1a1e; }
.ph-app { display: grid; justify-items: center; gap: 6px; padding: 18px 0 12px; text-align: center; font-size: 15px; }
.ph-app img { width: 56px; height: 56px; border-radius: 16px; }
.ph-app small { color: #777; font-size: 12px; max-width: 80%; }
.ph-notif { background: #fff; border-radius: 18px; padding: 10px 12px; box-shadow: 0 6px 18px rgba(0, 0, 0, .15); display: grid; gap: 6px; position: relative; z-index: 1; }
.ph-nh { display: flex; align-items: center; gap: 6px; font-size: 11px; }
.ph-nh img { width: 16px; height: 16px; border-radius: 4px; }
.ph-nh small { color: #888; }
.ph-input { display: flex; align-items: center; gap: 6px; border-radius: 999px; background: #f1eef1; padding: 4px 4px 4px 12px; outline: 2px solid #ff6f8e; }
.ph-input span { flex: 1; font-weight: 700; letter-spacing: .1em; }
.ph-input i { font-style: normal; font-weight: 700; color: #fff; background: #ff6f8e; border-radius: 999px; padding: 5px 10px; font-size: 12px; }
.ph-under { display: grid; gap: 4px; margin-top: 8px; filter: blur(1px); }
.art-duo { display: flex; align-items: center; justify-content: center; gap: 8px; flex-wrap: wrap; padding: 18px 0; }
.duo { display: grid; justify-items: center; gap: 4px; }
.duo span { font-size: 34px; width: 64px; height: 64px; display: grid; place-items: center; border-radius: 20px; background: var(--brand-soft); }
.duo small { font-size: 12px; font-weight: 600; color: var(--muted); }
.duo.plus { font-size: 22px; font-weight: 800; color: var(--muted); }
.ph-sec { color: #1a73e8; font-weight: 700; padding: 6px 4px 0; }
.ph-checkline { flex-basis: 100%; display: flex; align-items: center; gap: 6px; font-size: 11px; text-align: left; margin-bottom: 6px; }
.ph-checkline span { width: 16px; height: 16px; flex: none; display: grid; place-items: center; border-radius: 4px; background: #1a73e8; color: #fff; font-size: 11px; }
.ph-dbtns { flex-wrap: wrap; }
/* nhiều màn hình nối nhau (wide): điện thoại nhỏ hơn, có chú thích từng bước */
.art-seq { display: flex; align-items: flex-start; justify-content: center; gap: 8px; }
.art-seq figure { margin: 0; display: grid; justify-items: center; gap: 8px; }
.art-seq figcaption { font-size: 13px; font-weight: 600; color: var(--muted); text-align: center; max-width: 180px; }
.art-seq figcaption b { color: var(--brand); }
.art-seq .seq-arrow { align-self: center; margin-top: -30px; font-size: 22px; font-weight: 800; color: var(--muted); }
.art-seq .ph { width: 200px; padding: 6px; border-radius: 28px; }
.art-seq .ph-screen { height: 340px; border-radius: 23px; font-size: 12px; padding: 6px 9px 9px; }
.art-seq .ph-h { font-size: 15px; }
.art-seq .ph-row { padding: 8px 10px; }
@media (max-width: 679px) { .ph { width: 210px; } .ph-screen { height: 330px; }
  .art-seq { gap: 4px; }
  .art-seq .seq-arrow { font-size: 16px; }
  .art-seq .ph { width: 148px; border-radius: 22px; padding: 5px; }
  .art-seq .ph-screen { height: 270px; border-radius: 18px; font-size: 10px; padding: 5px 7px 7px; gap: 3px; }
  .art-seq .ph-status { font-size: 8px; padding-bottom: 3px; }
  .art-seq .ph-h { font-size: 12px; padding: 2px 2px 4px; }
  .art-seq .ph-row { padding: 6px 7px; border-radius: 10px; }
  .art-seq .ph-row small { font-size: 8.5px; }
  .art-seq .ph-tog { width: 26px; height: 16px; }
  .art-seq .ph-tog::after { width: 12px; height: 12px; }
  .art-seq .ph-tog.on::after { left: 12px; }
  .art-seq .ph-tap { font-size: 18px; }
  .art-seq .ph-dialog { padding: 10px 8px 8px; border-radius: 14px; }
  .art-seq .ph-dialog b { font-size: 11px; }
  .art-seq .ph-dialog p { font-size: 9.5px; }
  .art-seq .ph-btn { padding: 6px 6px; font-size: 10px; }
  .art-seq figcaption { font-size: 11.5px; max-width: 148px; }
}
@media (prefers-reduced-motion: reduce) { .slide, .ph-tap, .ph-btn.pulse, .ph-pet img { animation: none; } }

ol.steps { padding-left: 22px; line-height: 1.7; margin: 8px 0; }

#toast {
  position: fixed; left: 50%; bottom: calc(20px + env(safe-area-inset-bottom)); transform: translateX(-50%) translateY(120px);
  background: var(--text); color: var(--bg); padding: 12px 18px; border-radius: 14px; font-weight: 500;
  transition: transform .25s; max-width: calc(100% - 32px); z-index: 20; text-align: center;
}
#toast.show { transform: translateX(-50%) translateY(0); }

/* Bản đồ vị trí của bé (Google Maps nhúng) */
.map { display: block; width: 100%; height: 300px; border: 0; border-radius: 14px; background: var(--line); }
.map.small { height: 140px; pointer-events: none; border-radius: 14px; }
/* Mã đăng nhập bố mẹ (đầu trang) */
#ma-bo-me:empty { display: none; }
.code-card { display: flex; gap: 12px; align-items: center; border: 2px solid var(--brand); }
.code-card .code { font-size: 44px; font-weight: 800; letter-spacing: .25em; line-height: 1.1; margin: 4px 0; font-variant-numeric: tabular-nums; }
/* ghi chú của bé */
.note { border-left: 6px solid var(--c, var(--brand)); }
.note h3 { overflow-wrap: anywhere; }
.note .b { white-space: pre-wrap; overflow-wrap: anywhere; line-height: 1.5; margin: 8px 0; }
.note.deleted { opacity: .8; border-left-style: dashed; }
.note .badge { margin-top: 4px; }
/* ví của bé (public/vi.js) */
.wallet-bal { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; text-align: center; }
.wallet-bal > button { background: var(--card); border: 2px solid var(--line); border-radius: 14px; padding: 12px 8px; color: var(--text); font: inherit; cursor: pointer; }
.wallet-bal > button[aria-selected="true"] { background: var(--brand-soft); border-color: var(--brand); }
.wallet-bal b { display: block; font-size: 24px; margin-top: 2px; overflow-wrap: anywhere; }
.wallet-ask .b { white-space: pre-wrap; overflow-wrap: anywhere; margin: 8px 0; }
.wallet-log h3, .wallet-ask h3 { overflow-wrap: anywhere; }
.wallet-ledger table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.wallet-ledger th { text-align: right; font-size: 12px; color: var(--muted); font-weight: 600; padding: 6px 4px; border-bottom: 1px solid var(--line); }
.wallet-ledger th:first-child, .wallet-ledger td:first-child { text-align: left; }
.wallet-ledger td { text-align: right; padding: 8px 4px; border-bottom: 1px solid var(--line); vertical-align: top; white-space: nowrap; }
.wallet-ledger td:first-child { white-space: normal; overflow-wrap: anywhere; width: 100%; }
.wallet-ledger td.plus { color: var(--ok); }
.wallet-ledger td.minus { color: var(--danger); }
.tab[aria-pressed="true"] { background: var(--brand); color: #fff; }

/* Lịch của bé: thời khoá biểu (public/lich.js) */
.tkb-wrap { overflow-x: auto; margin-top: 10px; }
.tkb { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 420px; }
.tkb th, .tkb td { padding: 7px 5px; border-bottom: 1px solid var(--line); text-align: center; vertical-align: middle; }
.tkb thead th { font-size: 13px; color: var(--muted); }
.tkb tbody th { width: 52px; font-weight: 400; }
.tkb .today { background: var(--brand-soft); }
.tkb thead .today { color: var(--brand); font-weight: 800; }
.tkb tr.pm > * { border-top: 3px solid var(--line); }
.tkb-period { gap: 8px; margin: 6px 0; flex-wrap: nowrap; }
.tkb-period input[type="time"] { width: auto; min-width: 0; flex: 1; }
/* Thời khoá biểu theo tuần: bảng nhập (public/tkb.js) */
.tkb-edit { min-width: 720px; }
.tkb-edit td { padding: 4px 3px; }
.tkb-edit td input[type="text"] { min-width: 92px; min-height: 38px; padding: 6px 4px; font-size: 13px; text-align: center; border-radius: 8px; }
.tkb-edit .tkb-time { width: 96px; }
.tkb-edit .tkb-time input { min-height: 32px; padding: 3px 4px; font-size: 13px; border-radius: 8px; }
.tkb-edit .tkb-time input + input { margin-top: 3px; }
.tkb-save { position: sticky; bottom: 8px; background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 8px 10px; margin-top: 12px; box-shadow: var(--shadow); }
.tkb-save.dirty { border-color: var(--brand); }

/* Thú ảo (thu-ao.js) */
.pet-card { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.pet-pic { width: 128px; flex: none; }
.pet-pic svg { width: 100%; height: auto; display: block; }
.pet-stats { display: grid; gap: 6px; margin: 10px 0 6px; }
.pet-stat { display: grid; grid-template-columns: 7.5em 1fr 2.2em; align-items: center; gap: 8px; font-size: 14px; }
.pet-stat b { text-align: right; font-variant-numeric: tabular-nums; }
.pet-bar { height: 10px; border-radius: 5px; background: var(--line); overflow: hidden; }
.pet-bar i { display: block; height: 100%; background: var(--ok); border-radius: 5px; }
.pet-bar.low i { background: var(--warn); }
.pet-prices { width: 100%; border-collapse: collapse; margin: 6px 0 12px; font-size: 14px; }
.pet-prices td { padding: 5px 0; border-bottom: 1px solid var(--line); }
.pet-prices td:last-child { text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }

/* Bộ não AI: mỗi nhà AI một mục mở/đóng (aiKeysCard trong app.js) */
.ai-nha { border-top: 1px solid var(--line); padding: 10px 0; }
.ai-nha summary { cursor: pointer; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.warn-text { color: var(--warn); background: var(--warn-soft); border-radius: 10px; padding: 8px 10px; }

/* Sổ nhớ của thú ảo (petMemorySection trong app.js) */
.nho-nhom { margin: 14px 0 2px; font-size: 14px; color: var(--muted); }
.nho-nhom:first-child { margin-top: 0; }
.nho-item { align-items: flex-start; flex-wrap: wrap; }
.nho-item .badges { display: flex; flex-wrap: wrap; gap: 4px; margin: 4px 0 2px; }
.nho-item .badges:empty { display: none; }
.nho-item .btn { min-height: 36px; padding: 6px 12px; font-size: 14px; }
.nho-item.forgot > .grow > div:first-child { text-decoration: line-through; color: var(--muted); }
.nho-quen { border-top: 1px solid var(--line); margin-top: 8px; padding-top: 10px; }
.nho-quen summary { cursor: pointer; color: var(--muted); font-size: 14px; }
.nho-tom-tat { background: var(--brand-soft); }
/* nhãn cảnh báo trên bóng chat của bé: nền đỏ (đè .bubble.user .badge) */
.bubble .badge.danger { background: var(--danger); }

/* Thú ảo: các loại câu thú được nhắc */
.pet-hint-types .check { margin: 6px 0; }
.pet-mini { width: 48px; flex: none; }
.pet-mini .pet-pic { width: 48px; }

/* Link nhóm cộng đồng PetOS (trang đăng nhập, hướng dẫn cài đặt) */
.help-link { display: block; width: fit-content; margin: 14px auto 4px; font-size: 14px; font-weight: 600; color: var(--muted); }
.help-card { margin-top: 12px; }