/* Pindu — trang giới thiệu ứng dụng + chính sách.
   Một file CSS dùng chung cho mọi trang, không phụ thuộc thư viện ngoài. */

:root {
  --blue-700: #0056b3;
  --blue-600: #0069d9;
  --blue-500: #0094ff;
  --blue-50: #eaf4ff;
  --ink-900: #0b1f33;
  --ink-700: #33475b;
  --ink-500: #5b6f82;
  --ink-300: #9aa9b8;
  --line: #e3e9f0;
  --surface: #ffffff;
  --ground: #f5f8fb;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(11, 31, 51, 0.08);
  --font: "Be Vietnam Pro", -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, "Helvetica Neue", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink-700);
  background: var(--ground);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--blue-600);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.wrap {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px;
}

.narrow {
  max-width: 760px;
}

/* ---------- Thanh trên cùng ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--line);
}

.topbar .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 20px;
  color: var(--ink-900);
}

.brand:hover {
  text-decoration: none;
}

.brand img {
  width: 34px;
  height: 34px;
  border-radius: 9px;
}

.nav {
  display: flex;
  gap: 22px;
  font-size: 15px;
  font-weight: 600;
}

.nav a {
  color: var(--ink-700);
}

.nav a[aria-current="page"] {
  color: var(--blue-600);
}

/* ---------- Hero trang chủ ---------- */
.hero {
  background: linear-gradient(135deg, var(--blue-600), var(--blue-500));
  color: #fff;
  overflow: hidden;
}

.hero .wrap {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 40px;
  align-items: center;
  padding-top: 64px;
  padding-bottom: 64px;
}

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 6px 12px;
  border-radius: 999px;
}

.hero h1 {
  overflow-wrap: anywhere;
  margin: 18px 0 14px;
  font-size: clamp(32px, 5vw, 50px);
  line-height: 1.15;
  font-weight: 800;
  color: #fff;
}

.hero p.lead {
  margin: 0 0 28px;
  font-size: 18px;
  color: rgba(255, 255, 255, 0.92);
  max-width: 520px;
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  padding: 0;
  margin: 0;
  list-style: none;
  font-weight: 600;
  font-size: 15px;
}

.hero-points li::before {
  content: "✓";
  margin-right: 8px;
}

.phones {
  display: flex;
  justify-content: center;
  gap: 18px;
}

.phone {
  min-width: 0;
  width: 46%;
  max-width: 230px;
  border-radius: 30px;
  border: 7px solid #0b1f33;
  background: #0b1f33;
  box-shadow: 0 24px 50px rgba(0, 0, 0, 0.28);
  overflow: hidden;
}

.phone img {
  border-radius: 23px;
}

.phone.lift {
  transform: translateY(-26px);
}

/* ---------- Khối nội dung ---------- */
section.block {
  padding: 72px 0;
}

section.block.alt {
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.block h2 {
  margin: 0 0 10px;
  font-size: clamp(26px, 3.4vw, 34px);
  line-height: 1.25;
  color: var(--ink-900);
  font-weight: 800;
}

.block p.sub {
  margin: 0 0 36px;
  color: var(--ink-500);
  font-size: 17px;
  max-width: 620px;
}

.grid {
  display: grid;
  gap: 18px;
}

.grid.four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.block.alt .card {
  background: var(--ground);
}

.card .icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 22px;
  background: var(--blue-50);
  margin-bottom: 14px;
}

.card h3 {
  margin: 0 0 6px;
  font-size: 17px;
  color: var(--ink-900);
}

.card p {
  margin: 0;
  font-size: 15px;
  color: var(--ink-500);
}

.step-no {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 999px;
  background: var(--blue-600);
  color: #fff;
  font-weight: 800;
  font-size: 14px;
  margin-bottom: 12px;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background: linear-gradient(135deg, var(--blue-600), var(--blue-500));
  color: #fff;
  border-radius: 22px;
  padding: 34px;
}

.cta h2 {
  color: #fff;
  margin: 0 0 6px;
}

.cta p {
  margin: 0;
  color: rgba(255, 255, 255, 0.9);
}

.btn {
  display: inline-block;
  background: #fff;
  color: var(--blue-700);
  font-weight: 700;
  padding: 13px 22px;
  border-radius: 12px;
}

.btn:hover {
  text-decoration: none;
  opacity: 0.94;
}

/* ---------- Trang văn bản (chính sách, điều khoản, hỗ trợ) ---------- */
.doc-hero {
  background: linear-gradient(135deg, var(--blue-600), var(--blue-500));
  color: #fff;
}

.doc-hero .wrap {
  padding-top: 52px;
  padding-bottom: 52px;
}

.doc-hero h1 {
  margin: 6px 0 10px;
  font-size: clamp(30px, 4.2vw, 42px);
  line-height: 1.2;
  color: #fff;
}

.doc-hero p {
  margin: 0;
  color: rgba(255, 255, 255, 0.92);
  max-width: 640px;
}

.doc-hero .meta {
  margin-top: 14px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.8);
}

.doc {
  padding: 40px 0 72px;
}

.toc {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin-bottom: 36px;
}

.toc strong {
  display: block;
  color: var(--ink-900);
  margin-bottom: 8px;
}

.toc ol {
  margin: 0;
  padding-left: 20px;
  columns: 2;
  column-gap: 28px;
  font-size: 15px;
}

.doc article section {
  scroll-margin-top: 84px;
  margin-bottom: 34px;
}

.doc h2 {
  margin: 0 0 12px;
  padding-left: 12px;
  border-left: 4px solid var(--blue-500);
  font-size: 21px;
  line-height: 1.3;
  color: var(--ink-900);
}

.doc h3 {
  margin: 18px 0 6px;
  font-size: 16px;
  color: var(--ink-900);
}

.doc ul,
.doc ol {
  padding-left: 22px;
}

.doc li {
  margin: 4px 0;
}

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

.box.note {
  background: var(--blue-50);
  border-color: #cfe4fb;
}

.contact-list {
  list-style: none;
  padding: 0 !important;
  margin: 10px 0 0;
}

.contact-list li {
  margin: 6px 0;
}

details.faq {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 18px;
  margin-bottom: 10px;
}

details.faq summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--ink-900);
}

details.faq p {
  margin: 10px 0 0;
}

/* ---------- Chân trang ---------- */
footer.site {
  background: #0b1f33;
  color: #b7c4d1;
  font-size: 14px;
}

footer.site .wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 18px;
  padding-top: 30px;
  padding-bottom: 30px;
}

footer.site a {
  color: #dbe5ee;
}

footer.site nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

/* ---------- Màn hình nhỏ ---------- */
@media (max-width: 900px) {
  .hero .wrap {
    grid-template-columns: minmax(0, 1fr);
    padding-top: 44px;
    padding-bottom: 44px;
  }

  .grid.four {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid.three {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 600px) {
  .nav {
    gap: 14px;
    font-size: 14px;
  }

  .nav .hide-sm {
    display: none;
  }

  .grid.four {
    grid-template-columns: minmax(0, 1fr);
  }

  .toc ol {
    columns: 1;
  }

  section.block {
    padding: 52px 0;
  }

  .cta {
    padding: 26px;
  }
}