:root {
  --bg: #f3f8ff;
  --surface: #ffffff;
  --surface-soft: #eaf2ff;
  --text: #11203d;
  --muted: #4f6283;
  --primary: #62a6ff;
  --primary-dark: #3b8cf2;
  --accent: #62a6ff;
  --border: rgba(98, 166, 255, 0.18);
  --shadow: 0 16px 36px rgba(17, 32, 61, 0.08);
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html {
  font-size: 18px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Aptos", "Segoe UI Variable", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(98, 166, 255, 0.13), transparent 26%),
    radial-gradient(circle at 88% 8%, rgba(98, 166, 255, 0.10), transparent 22%),
    linear-gradient(180deg, var(--bg), #f8fbff 50%, #ffffff 100%);
  line-height: 1.6;
  min-height: 100vh;
}

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

a {
  color: var(--primary-dark);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  transition: color 180ms ease, background 180ms ease, transform 180ms ease;
}

a:hover {
  text-decoration: none;
}

.container {
  width: min(1100px, 92%);
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  background: #fff;
  padding: 0.5rem 0.75rem;
  border: 2px solid var(--primary);
  border-radius: 0.5rem;
}

/* ── Header ── */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(243, 248, 255, 0.88);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(16px);
  z-index: 10;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.2rem;
  padding: 0.7rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: inherit;
  min-width: 0;
}

.brand-mark {
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 0.8rem;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), #8bc2ff);
  color: #fff;
  font-weight: 800;
  font-size: 0.9rem;
  box-shadow: 0 8px 20px rgba(98, 166, 255, 0.28);
}

.brand-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.brand-name {
  font-size: 1.1rem;
  font-weight: 800;
  display: block;
  line-height: 1.1;
  background: linear-gradient(135deg, var(--primary-dark), #62a6ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-sub {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--muted);
  display: block;
  white-space: nowrap;
}

.main-nav {
  margin-left: auto;
}

.nav-list {
  margin: 0;
  padding: 0.38rem;
  list-style: none;
  display: flex;
  gap: 0.35rem;
  align-items: center;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--border);
  border-radius: 1rem;
  box-shadow: 0 8px 24px rgba(17, 32, 61, 0.06);
}

.nav-list a {
  font-weight: 600;
  text-decoration: none;
  padding: 0.5rem 0.75rem;
  border-radius: 0.7rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: background 160ms ease, transform 160ms ease;
}

.nav-list a:hover {
  background: var(--surface-soft);
  transform: translateY(-1px);
}

.nav-list a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.nav-list a.is-active {
  background: var(--primary);
  color: #fff;
}

.cta-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 0.85rem;
  border-radius: 0.7rem;
  font-weight: 700;
  font-size: 0.88rem;
  text-decoration: none;
}

.cta-appstore {
  background: #000;
  color: #fff;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.22);
}

.cta-appstore:hover {
  background: #1a1a1a;
  color: #fff;
}

.cta-googleplay {
  background: linear-gradient(135deg, #1a73e8, #0d5fc4);
  color: #fff;
  box-shadow: 0 6px 16px rgba(26, 115, 232, 0.28);
}

.cta-googleplay:hover {
  background: linear-gradient(135deg, #1557b0, #0a4da0);
  color: #fff;
}

.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--primary-dark);
  background: linear-gradient(135deg, var(--primary), #8bc2ff);
  color: #fff;
  border-radius: 0.7rem;
  padding: 0.52rem 0.75rem;
  font: inherit;
  cursor: pointer;
  box-shadow: 0 8px 18px rgba(98, 166, 255, 0.28);
  min-height: 2.6rem;
  min-width: 2.6rem;
}

.menu-icon {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 18px;
}

.menu-icon span {
  display: block;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 240ms ease, opacity 160ms ease;
  transform-origin: center;
}

.menu-toggle[aria-expanded="true"] .menu-icon span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .menu-icon span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.menu-toggle[aria-expanded="true"] .menu-icon span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ── Hero ── */
.hero {
  padding: 4rem 0 3.5rem;
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 380px;
  background:
    radial-gradient(circle at 18% 25%, rgba(98, 166, 255, 0.12), transparent 24%),
    radial-gradient(circle at 84% 12%, rgba(98, 166, 255, 0.10), transparent 22%);
  pointer-events: none;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 2rem;
  align-items: center;
  position: relative;
}

.hero-copy {
  padding: 0.5rem 0;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 700;
  color: var(--primary);
  margin: 0 0 0.5rem;
  font-size: 0.8rem;
}

.hero-inner h1 {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  line-height: 1.08;
  margin: 0.3rem 0 1rem;
  max-width: 18ch;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.lead {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 58ch;
  margin: 0 0 0.5rem;
}

/* Category pills */
.category-pills {
  list-style: none;
  padding: 0;
  margin: 1.2rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.category-pills li {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(98, 166, 255, 0.22);
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: 0 3px 10px rgba(98, 166, 255, 0.07);
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.category-pills li:hover {
  transform: translateY(-2px);
  box-shadow: 0 7px 18px rgba(98, 166, 255, 0.13);
}

.pill-icon {
  font-size: 0.95rem;
  line-height: 1;
}

.hero-actions {
  display: flex;
  gap: 0.85rem;
  flex-wrap: wrap;
  margin-top: 1.6rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  text-decoration: none;
  padding: 0.85rem 1.2rem;
  border-radius: 0.9rem;
  border: 1px solid transparent;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #8bc2ff);
  color: #fff;
  box-shadow: 0 10px 24px rgba(98, 166, 255, 0.28);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 32px rgba(98, 166, 255, 0.35);
  color: #fff;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.88);
  color: var(--text);
  border-color: var(--border);
  box-shadow: var(--shadow);
}

.btn-secondary:hover {
  background: #fff;
  transform: translateY(-1px);
}

.btn-hero {
  border-radius: 999px;
  padding: 0.9rem 1.5rem;
  gap: 0.45rem;
}

/* Hero Store Block */
.hero-store-block {
  position: relative;
}

.hero-store-card {
  padding: 1.6rem;
  border-radius: 1.6rem;
  background: linear-gradient(160deg, rgba(17, 32, 61, 0.94), rgba(28, 55, 99, 0.96));
  border: 1px solid rgba(139, 194, 255, 0.15);
  box-shadow: 0 28px 60px rgba(17, 32, 61, 0.22);
  color: #f0f6ff;
  position: relative;
  overflow: hidden;
}

.hero-store-card::before {
  content: "";
  position: absolute;
  inset: auto -40px -40px auto;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139, 194, 255, 0.18), transparent 65%);
  pointer-events: none;
}

.hero-store-headline {
  margin: 0 0 0.35rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
}

.hero-store-sub {
  margin: 0 0 1.4rem;
  font-size: 0.9rem;
  color: rgba(215, 235, 255, 0.82);
}

/* Store Buttons */
.store-buttons {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: 0.85rem;
}

/* Hero badge links — dùng file SVG badge đầy đủ */
.store-badge-link {
  display: inline-block;
  text-decoration: none;
  transition: transform 200ms ease, filter 200ms ease;
  border-radius: 0.6rem;
  overflow: hidden;
  line-height: 0;
}

.store-badge-link:hover {
  transform: translateY(-3px);
  filter: brightness(1.08);
}

.store-btn-icon {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.store-btn-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.store-btn-sub-text {
  font-size: 0.72rem;
  font-weight: 500;
  opacity: 0.78;
  letter-spacing: 0.02em;
}

.store-btn-name {
  font-size: 1rem;
  font-weight: 700;
}

.hero-store-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.1rem;
}

.store-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.28rem 0.65rem;
  border-radius: 999px;
  background: rgba(139, 194, 255, 0.12);
  border: 1px solid rgba(139, 194, 255, 0.22);
  color: #b8d8ff;
  font-size: 0.78rem;
  font-weight: 600;
}

/* ── Sections ── */
.section {
  padding: 3rem 0;
}

.section-alt {
  background: linear-gradient(180deg, rgba(234, 242, 255, 0.7), rgba(255, 255, 255, 0.6));
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-head {
  margin-bottom: 1.6rem;
}

.section h2 {
  margin-top: 0;
  font-size: clamp(1.7rem, 3.8vw, 2.5rem);
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.section-intro {
  color: var(--muted);
  margin: 0.4rem 0 0;
  max-width: 62ch;
}

/* ── Apps Grid ── */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.app-showcase-card {
  padding: 0;
  border-radius: 1.35rem;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* Image area */
.app-showcase-img-wrap {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  flex-shrink: 0;
  background: linear-gradient(135deg, rgba(98, 166, 255, 0.12), rgba(17, 32, 61, 0.5));
}

.app-showcase-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 350ms ease;
}

.app-showcase-card:hover .app-showcase-img {
  transform: scale(1.04);
}

/* Text body */
.app-showcase-body {
  padding: 1.35rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.app-showcase-primary {
  background:
    radial-gradient(circle at top left, rgba(98, 166, 255, 0.10), transparent 30%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(243, 248, 255, 0.92));
  border-color: rgba(98, 166, 255, 0.28);
  box-shadow: 0 20px 48px rgba(98, 166, 255, 0.12);
}

.app-showcase-badge {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  z-index: 2;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--primary), #8bc2ff);
  color: #fff;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  box-shadow: 0 4px 12px rgba(98, 166, 255, 0.3);
}

.card-tag {
  margin: 0 0 0.4rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary);
}

.app-showcase-body h3 {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
}

.app-showcase-body>p {
  color: var(--muted);
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
}

.feature-list {
  padding-left: 1.2rem;
}

.feature-list li {
  margin-bottom: 0.4rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.compact-list {
  margin: 0.6rem 0 0;
}

.app-coming-soon {
  display: inline-flex;
  align-items: center;
  margin-top: 1rem;
  padding: 0.28rem 0.7rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  background: rgba(98, 166, 255, 0.08);
  border: 1px solid rgba(98, 166, 255, 0.18);
  color: var(--primary);
}

/* App store pills (inside cards) */
.app-store-row {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.app-store-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.app-store-pill:hover {
  transform: translateY(-2px);
}

.app-store-pill-apple {
  background: #000;
  color: #fff;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.22);
}

.app-store-pill-apple:hover {
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.3);
  color: #fff;
}

/* icon_appstore.svg có fill đen → cần invert sang trắng trên nền đen */
.app-store-pill-apple img {
  filter: brightness(0) invert(1);
}

.app-store-pill-google {
  background: linear-gradient(135deg, #1a73e8, #0d5fc4);
  color: #fff;
  box-shadow: 0 4px 14px rgba(26, 115, 232, 0.3);
}

.app-store-pill-google:hover {
  box-shadow: 0 8px 22px rgba(26, 115, 232, 0.4);
  color: #fff;
}

/* ── Focus/Approach ── */
.focus-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.focus-card {
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid var(--border);
  border-radius: 1.2rem;
  padding: 1.3rem;
  box-shadow: var(--shadow);
}

.focus-icon {
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 0.75rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), #8bc2ff);
  color: #fff;
  font-weight: 800;
  font-size: 0.9rem;
  margin-bottom: 0.85rem;
  box-shadow: 0 8px 18px rgba(98, 166, 255, 0.25);
}

.focus-card h3 {
  margin: 0 0 0.45rem;
  font-size: 1.1rem;
}

.focus-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.93rem;
}

/* ── Contact ── */
.contact-card-simple {
  max-width: 960px;
  margin: 0 auto;
  text-align: center;
}

.contact-card-simple h2 {
  margin-top: 0.3rem;
}

.contact-lead {
  color: var(--muted);
  max-width: 52ch;
  margin: 0.5rem auto 0;
}

.contact-channels {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.contact-channel {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.2rem 1.25rem;
  border-radius: 1.2rem;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  text-decoration: none;
  color: var(--text);
  transition: transform 200ms ease, box-shadow 200ms ease;
}

.contact-channel:hover {
  transform: translateY(-3px);
  box-shadow: 0 20px 44px rgba(17, 32, 61, 0.12);
  color: var(--text);
}

.contact-channel-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 0.9rem;
  background: linear-gradient(135deg, var(--primary), #8bc2ff);
  color: #fff;
  flex-shrink: 0;
  box-shadow: 0 8px 18px rgba(98, 166, 255, 0.28);
}

.contact-channel-icon-apple {
  background: #000;
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.22);
}

.contact-channel-icon-google {
  background: linear-gradient(135deg, #1a73e8, #0d5fc4);
  box-shadow: 0 8px 18px rgba(26, 115, 232, 0.28);
}

.contact-channel>div {
  display: flex;
  flex-direction: column;
  gap: 0.12rem;
  text-align: left;
  min-width: 0;
}

.contact-channel-label {
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.contact-channel-value {
  font-size: 0.95rem;
  font-weight: 700;
}

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.8rem 0;
  background: rgba(255, 255, 255, 0.8);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem 2rem;
  align-items: start;
}

.footer-title {
  margin: 0 0 0.3rem;
  font-weight: 800;
  font-size: 1.05rem;
}

.footer-copy {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
  max-width: 48ch;
}

.footer-legal {
  grid-column: 1 / -1;
  margin: 0;
  color: var(--muted);
  font-size: 0.84rem;
  padding-top: 0.8rem;
  border-top: 1px solid rgba(98, 166, 255, 0.12);
}

.footer-store-links {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  flex-wrap: wrap;
}

.footer-store-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.9rem;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: none;
  transition: transform 160ms ease;
}

.footer-store-link:hover {
  transform: translateY(-2px);
}

.footer-store-apple {
  background: #000;
  color: #fff;
}

.footer-store-apple:hover {
  color: #fff;
}

.footer-store-google {
  background: linear-gradient(135deg, #1a73e8, #0d5fc4);
  color: #fff;
}

.footer-store-google:hover {
  color: #fff;
}

/* ── Mobile ── */
@media (max-width: 700px) {
  html {
    font-size: 16px;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    margin-left: 0;
    background: rgba(243, 248, 255, 0.98);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(20px);
    display: grid;
    grid-template-rows: 0fr;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: grid-template-rows 260ms ease, opacity 200ms ease, visibility 0ms linear 260ms;
    overflow: hidden;
  }

  .main-nav.is-open {
    grid-template-rows: 1fr;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    box-shadow: 0 10px 28px rgba(17, 32, 61, 0.10);
    transition: grid-template-rows 260ms ease, opacity 200ms ease;
  }

  .nav-list {
    min-height: 0;
    overflow: hidden;
    flex-direction: column;
    align-items: stretch;
    gap: 0.2rem;
    width: 100%;
    padding: 0.5rem 4% 0.8rem;
    background: transparent;
    border: none;
    box-shadow: none;
    border-radius: 0;
  }

  .nav-list li {
    width: 100%;
  }

  .nav-list a {
    width: 100%;
    justify-content: flex-start;
    padding: 0.7rem 1rem;
    font-size: 0.98rem;
  }

  .cta-link {
    justify-content: center;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .hero {
    padding: 2.5rem 0 2rem;
  }

  .apps-grid {
    grid-template-columns: 1fr;
  }

  .focus-grid {
    grid-template-columns: 1fr;
  }

  .contact-channels {
    grid-template-columns: 1fr;
  }

  .store-buttons {
    flex-direction: row;
  }

  .store-btn {
    min-width: 0;
    flex: 1;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }

  .footer-store-links {
    margin-top: 0.5rem;
  }
}

@media (max-width: 500px) {
  /* .store-buttons already has flex-wrap: wrap; so it will wrap if needed */
}