/* Trang giới thiệu petos.vn. Cùng bảng màu với trang bố mẹ (style.css). Cũng là kiểu chung của khoa-may-usb.html
   (nav, wrap, btn, pill, block, steps, faq, foot): đổi tên lớp nào thì xem lại trang đó. */
:root {
  --bg: #fbf7f3;
  --bg2: #f5ede7;
  --card: #ffffff;
  --text: #2b2230;
  --muted: #6f6474;
  --line: #ebe1da;
  --brand: #e2557a;
  --brand-ink: #bf365c;
  --brand-soft: #fce6ec;
  --ok: #23856d;
  --ok-soft: #e0f2ec;
  --warn: #b9561a;
  --danger: #cf3737;
  --plum: #33263d;
  --shadow: 0 1px 2px rgba(60, 30, 50, .05), 0 6px 20px rgba(60, 30, 50, .06);
  --shadow-lg: 0 24px 60px rgba(60, 30, 60, .18);
  --radius: 20px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #18141a; --bg2: #211b23; --card: #251f28; --text: #f3ecf2; --muted: #b3a7b4; --line: #382f3a;
    --brand: #ff86a3; --brand-ink: #ffadc0; --brand-soft: #47293b; --ok: #5ccfac; --ok-soft: #1b3630; --warn: #ffae73;
    --danger: #ff7d7d; --plum: #2c2134;
    --shadow: 0 2px 10px rgba(0, 0, 0, .35); --shadow-lg: 0 24px 60px rgba(0, 0, 0, .55);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #18141a; --bg2: #211b23; --card: #251f28; --text: #f3ecf2; --muted: #b3a7b4; --line: #382f3a;
  --brand: #ff86a3; --brand-ink: #ffadc0; --brand-soft: #47293b; --ok: #5ccfac; --ok-soft: #1b3630; --warn: #ffae73;
  --danger: #ff7d7d; --plum: #2c2134;
  --shadow: 0 2px 10px rgba(0, 0, 0, .35); --shadow-lg: 0 24px 60px rgba(0, 0, 0, .55);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
html, body { margin: 0; }
body {
  font-family: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--text); background: var(--bg); line-height: 1.6;
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
a { color: var(--brand-ink); }
h1, h2, h3 { margin: 0; line-height: 1.22; letter-spacing: -.015em; }
h2 { font-size: clamp(26px, 3.6vw, 38px); font-weight: 800; max-width: 22ch; text-wrap: balance; }
h3 { font-size: 17px; font-weight: 700; }
p { margin: 0; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .92em; background: var(--brand-soft); padding: 1px 6px; border-radius: 6px; overflow-wrap: anywhere; }
.muted { color: var(--muted); }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 720px) { .wrap { padding: 0 28px; } }

/* nút */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px; text-decoration: none;
  font: inherit; font-weight: 700; font-size: 15px; padding: 10px 18px; min-height: 44px; border-radius: 14px; border: 0; cursor: pointer;
  background: var(--brand); color: #fff; box-shadow: 0 6px 18px color-mix(in srgb, var(--brand) 30%, transparent);
  transition: transform .15s, box-shadow .15s, background .15s;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 10px 24px color-mix(in srgb, var(--brand) 38%, transparent); }
.btn:focus-visible, a:focus-visible, summary:focus-visible { outline: 3px solid var(--brand); outline-offset: 3px; }
.btn.big { font-size: 17px; padding: 14px 24px; min-height: 54px; border-radius: 16px; }
.btn.soft { background: var(--card); color: var(--text); box-shadow: var(--shadow); border: 1px solid var(--line); }
.btn.small { padding: 8px 16px; min-height: 40px; }
.btn[aria-disabled="true"] { background: var(--line); color: var(--muted); box-shadow: none; pointer-events: none; }
.pill {
  display: inline-block; font-size: 13px; font-weight: 700; padding: 5px 12px; border-radius: 999px;
  background: var(--brand-soft); color: var(--brand-ink);
}

/* thanh trên */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 84%, transparent); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
}
.nav-in { display: flex; align-items: center; gap: 16px; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 800; font-size: 19px; }
.brand img { border-radius: 10px; }
.links { display: none; gap: 24px; margin-left: auto; }
.links a { color: var(--muted); text-decoration: none; font-weight: 600; font-size: 15px; }
.links a:hover { color: var(--text); }
.nav .btn { margin-left: auto; }
@media (min-width: 960px) { .links { display: flex; } .nav .btn { margin-left: 8px; } }

/* mở đầu */
.hero { background: radial-gradient(110% 80% at 90% 0%, var(--bg2) 0%, var(--bg) 62%); padding: 36px 0 56px; }
.hero-in { display: grid; gap: 36px; align-items: center; }
@media (min-width: 940px) { .hero-in { grid-template-columns: 1.05fr 1fr; gap: 48px; } .hero { padding: 72px 0 96px; } }
.hero h1 { font-size: clamp(34px, 5.6vw, 60px); font-weight: 800; margin: 16px 0 18px; letter-spacing: -.025em; text-wrap: balance; max-width: 17ch; }
.lead { font-size: clamp(16px, 1.6vw, 18px); color: var(--muted); max-width: 56ch; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 18px; }
.cta .btn { flex: 1 1 220px; }
@media (min-width: 560px) { .cta .btn { flex: 0 0 auto; } }
.hero-facts { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; font-size: 15px; color: var(--muted); }
.hero-facts li { position: relative; padding-left: 26px; }
.hero-facts li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--ok); font-weight: 800; }

/* hai điện thoại: của mẹ (trước) và của bé (sau) */
.hero-art { position: relative; display: flex; justify-content: center; align-items: flex-end; min-height: 460px; padding: 10px 0; }
.phone {
  width: min(250px, 62vw); aspect-ratio: 9 / 18.5; border-radius: 40px; padding: 10px;
  background: #241b29; box-shadow: var(--shadow-lg); flex: none;
}
.phone.mom { position: relative; z-index: 2; transform: rotate(-3deg) translateX(8px); }
.phone.kid { transform: rotate(5deg) translate(-8px, -34px); width: min(220px, 52vw); }
@media (max-width: 520px) {
  .hero-art { min-height: 0; justify-content: flex-start; overflow-x: clip; padding: 10px 0 0; }
  .phone.mom { width: 62vw; transform: rotate(-2deg); margin-left: 2vw; }
  .phone.kid { width: 46vw; position: absolute; right: 0; top: 0; transform: rotate(5deg); }
}
.screen {
  height: 100%; border-radius: 31px; display: flex; flex-direction: column; padding: 10px 12px 12px; gap: 9px;
  overflow: hidden; color: #2b2230; position: relative;
}
.statusbar { display: flex; justify-content: space-between; font-size: 10px; font-weight: 700; padding: 2px 8px 0; opacity: .8; }
.mom-screen { background: #fbf7f3; }
.glance { background: #fff; border-radius: 16px; padding: 10px; display: grid; gap: 6px; box-shadow: 0 2px 8px rgba(60, 30, 50, .07); }
.g-head, .dash-top { display: flex; gap: 9px; align-items: center; }
.g-head b { font-size: 14px; display: block; line-height: 1.2; }
.g-head small, .dash-top small { font-size: 10px; color: #23856d; font-weight: 600; display: flex; align-items: center; gap: 4px; }
.g-av {
  width: 32px; height: 32px; border-radius: 11px; background: #f2a65a; color: #fff; display: grid; place-items: center;
  font-weight: 800; font-size: 15px; flex: none;
}
.dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; display: inline-block; }
.g-row { display: flex; gap: 6px; font-size: 10.5px; line-height: 1.35; background: #f7f1ec; border-radius: 9px; padding: 6px 8px; }
.g-title { font-size: 9px; font-weight: 800; text-transform: uppercase; letter-spacing: .07em; color: #6f6474; margin: 2px 4px -3px; }
.g-ask { background: #fff; border-radius: 14px; padding: 9px 10px; border: 1.5px solid #fce6ec; display: grid; gap: 2px; }
.g-ask b { font-size: 11px; }
.g-ask small { font-size: 9.5px; color: #6f6474; }
.g-btns { display: flex; gap: 6px; margin-top: 5px; }
.g-btns i { font-style: normal; font-size: 10px; font-weight: 700; padding: 5px 10px; border-radius: 8px; background: #f5ede7; }
.g-btns i.yes { background: #e2557a; color: #fff; }
.g-ev { display: flex; gap: 7px; font-size: 10.5px; font-weight: 600; background: #fff; border-radius: 11px; padding: 7px 9px; align-items: flex-start; }
.g-ev small { display: block; font-weight: 500; color: #6f6474; font-size: 9.5px; }
.g-ev.red { color: #b4322f; }

.launcher { background: linear-gradient(180deg, #fff3e3, #ffe3ea); }
.today { background: rgba(255, 255, 255, .75); border-radius: 14px; padding: 9px 11px; display: grid; gap: 1px; }
.today b { font-size: 13px; }
.today span { font-size: 11px; color: #6f6474; }
.tiles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px 6px; }
.tiles span { display: grid; justify-items: center; gap: 3px; font-size: 9.5px; font-weight: 600; text-align: center; line-height: 1.2; position: relative; }
.tiles i {
  font-style: normal; width: 42px; height: 42px; border-radius: 14px; background: #fff; display: grid; place-items: center;
  font-size: 20px; box-shadow: 0 3px 8px rgba(90, 40, 60, .08);
}
.tiles em {
  position: absolute; top: -4px; right: 8px; font-style: normal; background: #e5484d; color: #fff; font-size: 9px;
  min-width: 16px; height: 16px; border-radius: 8px; display: grid; place-items: center; font-weight: 800;
}
.walker { margin-top: auto; display: flex; align-items: flex-end; gap: 4px; }
.walker .pet-svg { width: 80px; flex: none; animation: stroll 9s ease-in-out infinite; }
.walker .say {
  flex: 1; background: #fff; font-size: 10.5px; line-height: 1.35; padding: 8px 9px; border-radius: 12px 12px 4px 12px;
  box-shadow: 0 3px 10px rgba(90, 40, 60, .1); margin-bottom: 40px;
}
.os-mark { font-weight: 800; letter-spacing: .04em; color: #c93d61; }
@keyframes stroll { 0%, 100% { transform: translateX(0); } 45%, 55% { transform: translateX(-8px); } }
.pet-svg svg, .pet-big svg { display: block; width: 100%; height: auto; overflow: visible; }
.bob { animation: bob 2.6s ease-in-out infinite; }
.wag { animation: wag .5s ease-in-out infinite alternate; transform-box: fill-box; transform-origin: 0 100%; }
@keyframes wag { from { rotate: -10deg; } to { rotate: 12deg; } }
@keyframes bob { 50% { transform: translateY(-8px); } }
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } html { scroll-behavior: auto; } }

/* dải ba lời hứa */
.promise { background: var(--plum); color: #f6eef4; padding: 24px 0; }
.promise-in { display: grid; gap: 14px 32px; }
@media (min-width: 760px) { .promise-in { grid-template-columns: repeat(3, 1fr); } }
.promise-item b { display: block; font-size: 16px; }
.promise-item span { font-size: 14px; opacity: .75; }

/* khối nội dung */
.block { padding: 64px 0; }
.block.tint { background: var(--bg2); }
@media (min-width: 900px) { .block { padding: 92px 0; } }
.sec-head { display: grid; gap: 12px; justify-items: start; }
.sec-lead { color: var(--muted); font-size: clamp(16px, 1.5vw, 18px); max-width: 62ch; }
.ico {
  font-size: 24px; display: inline-grid; place-items: center; width: 48px; height: 48px; border-radius: 15px;
  background: var(--brand-soft); flex: none;
}
.ticks { list-style: none; padding: 0; margin: 22px 0 0; display: grid; gap: 14px; }
.ticks li { position: relative; padding-left: 32px; }
.ticks li::before {
  content: "✓"; position: absolute; left: 0; top: 3px; width: 21px; height: 21px; border-radius: 50%;
  background: var(--ok); color: #fff; font-size: 12px; display: grid; place-items: center; font-weight: 800;
}

/* một ngày: giờ | máy của bé | điện thoại của mẹ */
.day { list-style: none; padding: 0; margin: 40px 0 0; display: grid; gap: 0; position: relative; }
.day::before { content: ""; position: absolute; left: 27px; top: 12px; bottom: 12px; width: 2px; background: var(--line); }
.day li { display: grid; grid-template-columns: 56px 1fr; gap: 6px 14px; padding: 14px 0; position: relative; }
.day time {
  grid-row: span 2; align-self: start; justify-self: center; position: relative; z-index: 1;
  font-weight: 800; font-size: 13px; background: var(--card); border: 2px solid var(--line); border-radius: 999px;
  padding: 3px 0; width: 56px; text-align: center; font-variant-numeric: tabular-nums;
}
.d-kid b { font-size: 17px; display: block; }
.d-kid p { color: var(--muted); margin-top: 2px; font-size: 15px; }
.d-mom {
  display: flex; gap: 10px; align-items: flex-start; background: var(--card); border-radius: 14px; padding: 10px 14px;
  box-shadow: var(--shadow); font-size: 15px; border-left: 3px solid var(--ok);
}
.d-mom.alert { border-left-color: var(--brand); }
.d-tag {
  flex: none; font-size: 11px; font-weight: 800; letter-spacing: .04em; text-transform: uppercase; color: var(--ok);
  background: var(--ok-soft); border-radius: 999px; padding: 2px 9px; margin-top: 2px;
}
.d-mom.alert .d-tag { color: var(--brand-ink); background: var(--brand-soft); }
@media (min-width: 860px) {
  .day::before { left: 39px; }
  .day li { grid-template-columns: 80px 1fr 1fr; gap: 24px; align-items: start; padding: 18px 0; }
  .day time { grid-row: auto; width: 64px; font-size: 14px; }
  .d-mom { margin-top: 2px; }
}

/* bốn câu mẹ hỏi */
.asks { display: grid; gap: 14px; margin-top: 36px; }
@media (min-width: 720px) { .asks { grid-template-columns: 1fr 1fr; gap: 18px; } }
.ask { background: var(--card); border-radius: 24px; padding: 22px; box-shadow: var(--shadow); display: grid; gap: 12px; align-content: start; }
.ask h3 { font-size: 20px; font-weight: 800; }
.ask ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.ask li { position: relative; padding-left: 22px; color: var(--muted); font-size: 15px; }
.ask li::before { content: ""; position: absolute; left: 4px; top: .62em; width: 7px; height: 7px; border-radius: 50%; background: var(--brand); }

/* so sánh với app quản lý con */
.compare { margin-top: 28px; border-radius: var(--radius); background: var(--card); box-shadow: var(--shadow); overflow: hidden; }
.cmp-row { display: grid; grid-template-columns: 1fr; gap: 4px; padding: 14px 18px; border-top: 1px solid var(--line); }
.cmp-row > span:first-child { font-weight: 700; }
.cmp-row > span { font-size: 15px; }
.cmp-row > span:nth-child(2) { color: var(--muted); }
.cmp-row > span:nth-child(2)::before { content: "App: "; font-weight: 700; }
.cmp-row > .cmp-os::before { content: "PetOS: "; font-weight: 700; color: var(--brand-ink); }
.cmp-head { display: none; }
@media (min-width: 760px) {
  .cmp-row { grid-template-columns: 150px 1fr 1fr; gap: 20px; padding: 14px 22px; align-items: start; }
  .cmp-row > span:nth-child(2)::before, .cmp-row > .cmp-os::before { content: none; }
  .cmp-head { display: grid; border-top: 0; font-size: 13px; font-weight: 800; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
  .cmp-row > .cmp-os { font-weight: 600; }
  .cmp-row:not(.cmp-head) > .cmp-os { background: var(--brand-soft); margin: -14px -22px -14px 0; padding: 14px 22px 14px 16px; }
  .cmp-head > .cmp-os { color: var(--brand-ink); padding: 0 16px; }
}

/* trang bố mẹ */
.parent-in { display: grid; gap: 36px; align-items: center; }
@media (min-width: 900px) { .parent-in { grid-template-columns: 1fr 1fr; gap: 56px; } }
.parent-in h2 { margin-top: 12px; }
.parent-in .sec-lead { margin-top: 12px; }
.dash { background: var(--card); border-radius: 28px; box-shadow: var(--shadow-lg); border: 1px solid var(--line); overflow: hidden; min-width: 0; padding: 18px; display: grid; gap: 12px; }
.dash-top b { font-size: 18px; display: block; line-height: 1.2; }
.dash-top small { font-size: 13px; color: var(--ok); }
.dash-top .g-av { width: 42px; height: 42px; font-size: 19px; border-radius: 14px; }
.dash-now { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.dash-now div { background: var(--bg2); border-radius: 14px; padding: 10px 12px; min-width: 0; }
.dash-now small { display: block; font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.dash-now b { font-size: 14px; }
.dash-log { list-style: none; margin: 0; padding: 0; }
.dash-log li { display: flex; gap: 12px; align-items: center; padding: 9px 2px; border-bottom: 1px solid var(--line); min-width: 0; }
.dash-log li:last-child { border-bottom: 0; }
.dash-log li > span { width: 34px; height: 34px; flex: none; border-radius: 10px; background: var(--bg2); display: grid; place-items: center; }
.dash-log li.red b { color: var(--danger); }
.dash-log b { display: block; font-size: 14px; }
.dash-log small { display: block; font-size: 12px; color: var(--muted); }
.dash-quick { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }
.dash-quick i { font-style: normal; font-size: 12px; font-weight: 700; text-align: center; background: var(--bg2); border-radius: 12px; padding: 8px 4px; }

/* cho bé: thú ảo */
.pet-stage { display: grid; gap: 24px; margin-top: 36px; align-items: start; }
@media (min-width: 900px) { .pet-stage { grid-template-columns: 340px 1fr; gap: 36px; } }
.pet-card {
  background: var(--card); border-radius: 28px; padding: 22px; box-shadow: var(--shadow-lg); border: 1px solid var(--line);
  display: grid; gap: 16px;
}
@media (min-width: 900px) { .pet-card { position: sticky; top: 88px; } }
.pet-big { width: min(210px, 66%); margin: 4px auto 0; }
.species { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; }
.species button {
  font: inherit; font-size: 13px; font-weight: 700; border: 1px solid var(--line); background: var(--bg); color: var(--text);
  padding: 7px 11px; border-radius: 999px; cursor: pointer; min-height: 36px;
}
.species button[aria-pressed="true"] { background: var(--brand); border-color: var(--brand); color: #fff; }
.species button:focus-visible { outline: 3px solid var(--brand); outline-offset: 2px; }
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 14px; }
.stats div { display: grid; gap: 4px; font-size: 13px; font-weight: 600; }
.stats i { display: block; height: 8px; border-radius: 4px; background: var(--line); position: relative; overflow: hidden; }
.stats i::after { content: ""; position: absolute; inset: 0 auto 0 0; width: var(--v); background: var(--brand); border-radius: 4px; }
.pet-points { display: grid; gap: 14px; }
@media (min-width: 640px) { .pet-points { grid-template-columns: 1fr 1fr; } .pet-points .alert { grid-column: 1 / -1; } }
.pet-points article { background: var(--card); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.pet-points p { color: var(--muted); margin-top: 8px; font-size: 15px; }
.pet-points .alert { border: 2px solid color-mix(in srgb, var(--danger) 35%, transparent); }
.footnote { font-size: 14px; color: var(--muted); margin-top: 18px; max-width: 80ch; }

/* cho bé: ứng dụng có sẵn */
.apps-title { font-size: 20px; font-weight: 800; margin-top: 56px; }
.apps { display: grid; gap: 12px; margin-top: 18px; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.app { background: var(--card); border-radius: 18px; padding: 16px; box-shadow: var(--shadow); display: flex; gap: 14px; align-items: flex-start; }
.app h3 { font-size: 16px; }
.app p { color: var(--muted); font-size: 14px; margin-top: 2px; }
.see { display: block; margin-top: 8px; font-size: 13px; font-weight: 600; color: var(--ok); }
.see::before { content: "👁 "; }

/* cài đặt */
.steps { list-style: none; padding: 0; margin: 32px 0 0; display: grid; gap: 16px; }
@media (min-width: 860px) { .steps { grid-template-columns: repeat(3, 1fr); } }
.steps li { display: flex; gap: 16px; background: var(--card); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); }
.steps .num {
  flex: none; width: 40px; height: 40px; border-radius: 12px; background: var(--brand); color: #fff;
  display: grid; place-items: center; font-weight: 800; font-size: 18px;
}
.steps p { color: var(--muted); margin-top: 6px; font-size: 15px; }
.need { display: grid; gap: 14px; margin-top: 16px; }
@media (min-width: 760px) { .need { grid-template-columns: 1fr 1fr; } }
.need > div { border: 1px dashed color-mix(in srgb, var(--muted) 40%, transparent); border-radius: var(--radius); padding: 18px 20px; }
.need ul { margin: 8px 0 0; padding-left: 20px; color: var(--muted); font-size: 15px; display: grid; gap: 4px; }

/* lời mời cuối mục cài đặt */
.cta-band {
  margin-top: 32px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 18px;
  background: var(--plum); color: #f6eef4; border-radius: 26px; padding: 28px; box-shadow: var(--shadow-lg);
}
.cta-band h3 { font-size: 22px; font-weight: 800; }
.cta-band p { margin-top: 4px; }
.cta-band .muted { color: #cdbfd0; }
.cta-band .btn { flex: 1 1 200px; }
@media (min-width: 560px) { .cta-band .btn { flex: 0 0 auto; } }

/* niềm tin */
.trust { display: grid; gap: 28px; align-items: center; }
@media (min-width: 860px) { .trust { grid-template-columns: 1.2fr 1fr; gap: 56px; } }
.trust p { color: var(--muted); margin-top: 14px; max-width: 60ch; }
.checks { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.checks li { background: var(--card); border-radius: 14px; padding: 12px 16px 12px 46px; position: relative; font-weight: 600; box-shadow: var(--shadow); }
.checks li::before {
  content: "✓"; position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
  width: 22px; height: 22px; border-radius: 50%; background: var(--ok); color: #fff; font-size: 13px; display: grid; place-items: center;
}

/* hỏi đáp */
.faq h2 { margin-bottom: 24px; }
.faq details { background: var(--card); border-radius: 16px; box-shadow: var(--shadow); margin: 10px 0; max-width: 820px; }
.faq summary { cursor: pointer; padding: 16px 48px 16px 18px; font-weight: 700; list-style: none; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 18px; top: 50%; transform: translateY(-50%); font-size: 22px; color: var(--brand-ink); }
.faq details[open] summary::after { content: "–"; }
.faq details p { padding: 0 18px 18px; color: var(--muted); }

.foot { border-top: 1px solid var(--line); padding: 26px 0 calc(26px + env(safe-area-inset-bottom)); }
.foot-in { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 24px; font-size: 14px; }
.foot .brand { font-size: 16px; margin-right: auto; }
.foot a:not(.brand) { color: var(--muted); }