/* ==========================================================================
   My Coaching — Landing v2
   Bám theo design "My Coaching Landing v2" (Claude Design).
   Token màu / bo góc / shadow lấy nguyên từ design, chuyển từ inline style
   sang class + biến CSS để dễ bảo trì và thêm breakpoint responsive thật.
   ========================================================================== */

:root {
  /* Ink & text */
  --ink: #171b23;
  --ink-2: #3a414d;
  --muted: #5c6472;
  --muted-2: #6c7482;
  --muted-3: #7b8290;
  --muted-4: #8a919e;

  /* Brand */
  --brand: #f2622a;
  --brand-dark: #d94e18;
  --brand-deep: #c9410f;
  --brand-grad: linear-gradient(135deg, #ff9a46, #f0431e);

  /* Accents */
  --green: #16a34a;
  --green-soft: #e8f7ee;
  --blue: #2563eb;
  --blue-soft: #edf3ff;
  --violet: #7c3aed;
  --violet-soft: #fbf3ff;
  --amber: #d97706;
  --amber-soft: #fff6e3;
  --rose: #e11d48;
  --rose-soft: #ffeff2;
  --peach-soft: #fff0e7;

  /* Surfaces */
  --page: #ffffff;
  --cream: #fff9f5;
  --line: #f0f1f5;
  --line-card: #f0e7e1;
  --line-peach: #f6e9e0;

  /* Device bezel */
  --bezel: linear-gradient(150deg, #5a6373 0%, #1b2029 34%, #080a0e 100%);
  --bezel-dark: linear-gradient(150deg, #6b7484 0%, #242a34 34%, #0c0f14 100%);
  --bezel-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.18),
    inset 0 2px 3px rgba(255, 255, 255, 0.22), 0 46px 70px -34px rgba(12, 16, 24, 0.55);

  --shell: 1200px;
  --gutter: 24px;
}

/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
  font-family: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--page);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  /* height:auto bắt buộc — attribute width/height trên <img> là presentational hint,
     nếu không override thì ảnh giữ nguyên 1558px chiều cao. */
  height: auto;
  display: block;
}

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

a:hover {
  color: var(--brand-dark);
}

::selection {
  background: #ffd9c2;
}

h1,
h2,
h3,
h4,
p {
  margin: 0;
}

:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
  border-radius: 6px;
}

.shell {
  max-width: var(--shell);
  margin: 0 auto;
}

.section {
  padding: 96px var(--gutter);
}

.section--cream {
  background: var(--cream);
}

.section--white {
  background: var(--page);
}

.section-head {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.eyebrow {
  display: inline-block;
  padding: 7px 15px;
  border-radius: 999px;
  background: var(--peach-soft);
  color: var(--brand-deep);
  font-size: 13.5px;
  font-weight: 700;
}

.eyebrow--outline {
  background: #fff;
  border: 1px solid #ffe0cd;
}

.section-title {
  margin-top: 16px;
  font-size: clamp(28px, 3.4vw, 42px);
  line-height: 1.15;
  letter-spacing: -0.035em;
  font-weight: 800;
  text-wrap: balance;
}

.section-lead {
  margin-top: 16px;
  font-size: 17px;
  line-height: 1.7;
  color: var(--muted);
  text-wrap: pretty;
}

.icon-badge {
  width: 46px;
  height: 46px;
  border-radius: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 16px;
  flex: none;
}

.icon-badge svg {
  width: 22px;
  height: 22px;
}

.icon-badge--peach {
  background: var(--peach-soft);
  color: var(--brand);
}
.icon-badge--blue {
  background: var(--blue-soft);
  color: var(--blue);
}
.icon-badge--green {
  background: var(--green-soft);
  color: var(--green);
}
.icon-badge--violet {
  background: var(--violet-soft);
  color: var(--violet);
}
.icon-badge--amber {
  background: var(--amber-soft);
  color: var(--amber);
}
.icon-badge--rose {
  background: var(--rose-soft);
  color: var(--rose);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 17px 30px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 16px;
  line-height: 1;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn--primary {
  background: var(--brand-grad);
  color: #fff;
  box-shadow: 0 18px 34px -14px rgba(240, 67, 30, 0.85);
}

.btn--primary:hover {
  color: #fff;
  box-shadow: 0 22px 38px -14px rgba(240, 67, 30, 0.9);
}

.btn--ghost {
  background: #fff;
  border: 1px solid #e7e9ef;
  color: var(--ink);
  font-weight: 600;
}

.btn--ghost:hover {
  color: var(--ink);
  border-color: #d8dbe4;
}

.btn--sm {
  padding: 11px 20px;
  font-size: 14.5px;
  box-shadow: 0 10px 22px -10px rgba(240, 67, 30, 0.85);
}

/* --------------------------------------------------------------------------
   Device frame
   -------------------------------------------------------------------------- */

.device {
  padding: 7px;
  border-radius: 30px;
  background: var(--bezel);
  box-shadow: var(--bezel-shadow);
  flex: none;
}

.device img {
  border-radius: 24px;
  width: 100%;
}

.device--lg {
  padding: 8px;
  border-radius: 36px;
}

.device--lg img {
  border-radius: 30px;
}

.device--onDark {
  background: var(--bezel-dark);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.2), 0 40px 70px -30px rgba(0, 0, 0, 0.75);
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}

.site-header__inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 14px var(--gutter);
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  flex: none;
}

.brand:hover {
  color: var(--ink);
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 11px;
}

.brand span {
  font-weight: 800;
  font-size: 19px;
  letter-spacing: -0.02em;
}

.site-nav {
  display: flex;
  gap: 22px;
  margin-left: auto;
  align-items: center;
  font-size: 15px;
  font-weight: 500;
}

.site-nav a {
  color: var(--muted);
  white-space: nowrap;
}

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

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid #ebedf2;
  background: #fff;
  padding: 0;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--ink);
  position: relative;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--ink);
}

.nav-toggle span::before {
  top: -6px;
}

.nav-toggle span::after {
  top: 6px;
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */

.hero {
  position: relative;
  padding: 64px var(--gutter) 90px;
  background: linear-gradient(160deg, #fff7f2 0%, #fffdfb 55%, #fdf6ff 100%);
  overflow: hidden;
}

.hero__blob {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.hero__blob--warm {
  top: -220px;
  right: -140px;
  width: 720px;
  height: 720px;
  background: radial-gradient(circle at 45% 45%, rgba(255, 154, 70, 0.32), rgba(255, 154, 70, 0) 66%);
}

.hero__blob--cool {
  bottom: -260px;
  left: -180px;
  width: 620px;
  height: 620px;
  background: radial-gradient(circle at 60% 40%, rgba(124, 140, 255, 0.18), rgba(124, 140, 255, 0) 66%);
}

.hero__inner {
  position: relative;
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 40px;
  align-items: center;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 18px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid #ffe0cd;
  color: var(--brand-deep);
  font-size: 14px;
  font-weight: 700;
  box-shadow: 0 8px 20px -12px rgba(240, 67, 30, 0.45);
}

.hero__badge i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  display: block;
}

.hero__title {
  margin-top: 24px;
  font-size: clamp(36px, 4.8vw, 62px);
  line-height: 1.04;
  letter-spacing: -0.045em;
  font-weight: 800;
  text-wrap: balance;
}

.hero__title em {
  font-style: normal;
  color: var(--brand);
}

.hero__text {
  margin-top: 24px;
  font-size: 18px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 520px;
  text-wrap: pretty;
}

.hero__actions {
  display: flex;
  gap: 12px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.hero__stats {
  display: flex;
  gap: 28px;
  margin-top: 34px;
  flex-wrap: wrap;
}

.hero__stats strong {
  display: block;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--ink);
}

.hero__stats span {
  display: block;
  font-size: 14.5px;
  color: var(--muted-3);
  margin-top: 3px;
}

.hero__stats-divider {
  width: 1px;
  background: #ebe2db;
}

.hero__pills {
  display: flex;
  gap: 10px;
  margin-top: 34px;
  flex-wrap: wrap;
}

.hero__pills span {
  padding: 11px 18px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid #f1e3d9;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--ink-2);
  box-shadow: 0 8px 20px -16px rgba(23, 27, 35, 0.5);
}

/* Hero collage --------------------------------------------------------- */

.collage {
  position: relative;
  min-width: 0;
  height: clamp(520px, 50vw, 700px);
}

.collage__phone {
  position: absolute;
  transform-origin: center;
}

.collage__phone .device {
  padding: 6px;
  border-radius: 26px;
  height: 100%;
}

.collage__phone .device img {
  height: 100%;
  width: auto;
  border-radius: 18px;
}

.collage__phone--1 {
  left: 1%;
  top: 18%;
  height: 58%;
  transform: rotate(-9deg);
  z-index: 2;
}
.collage__phone--2 {
  left: 13%;
  top: 36%;
  height: 58%;
  transform: rotate(-9deg);
  z-index: 3;
}
.collage__phone--3 {
  left: 29%;
  top: 42%;
  height: 55%;
  transform: rotate(-4deg);
  z-index: 4;
}
.collage__phone--4 {
  right: 1%;
  top: 30%;
  height: 56%;
  transform: rotate(5deg);
  z-index: 3;
}
.collage__phone--5 {
  right: 11%;
  top: 12%;
  height: 62%;
  transform: rotate(2deg);
  z-index: 4;
}
.collage__phone--hero {
  left: 35%;
  top: 6%;
  height: 76%;
  z-index: 6;
}

.collage__phone--hero .device {
  padding: 8px;
  border-radius: 34px;
}

.collage__phone--hero .device img {
  border-radius: 24px;
}

.chip {
  position: absolute;
  z-index: 9;
  display: flex;
  gap: 12px;
  align-items: center;
  background: #fff;
  border-radius: 18px;
  padding: 12px 16px;
  box-shadow: 0 20px 44px -20px rgba(23, 27, 35, 0.32);
  animation: floaty 6s ease-in-out infinite;
}

.chip__icon {
  flex: none;
  width: 36px;
  height: 36px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 13.5px;
}

.chip__icon svg {
  width: 17px;
  height: 17px;
}

.chip strong {
  display: block;
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.chip span {
  display: block;
  font-size: 12.5px;
  color: var(--muted-3);
  white-space: nowrap;
}

.chip--1 {
  left: 18%;
  top: 0;
}
.chip--2 {
  right: 0;
  top: 4%;
  animation-delay: 0.9s;
}
.chip--3 {
  right: 2%;
  bottom: 8%;
  animation-delay: 1.5s;
}
.chip--4 {
  left: 8%;
  bottom: 0;
  animation-delay: 2.1s;
}

@keyframes floaty {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-12px);
  }
}

/* --------------------------------------------------------------------------
   Proof strip
   -------------------------------------------------------------------------- */

.proof {
  padding: 26px var(--gutter);
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.proof__inner {
  max-width: var(--shell);
  margin: 0 auto;
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  color: var(--muted-4);
  font-size: 15px;
  font-weight: 500;
}

.proof__dot {
  color: #d7dbe2;
}

/* --------------------------------------------------------------------------
   Grid cards
   -------------------------------------------------------------------------- */

.grid {
  display: grid;
  gap: 22px;
  margin-top: 50px;
}

.grid--4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  margin-top: 52px;
}

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

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

.pain-card {
  border-radius: 24px;
  padding: 28px;
}

.pain-card h3 {
  margin: 18px 0 8px;
  font-size: 19px;
  font-weight: 700;
}

.pain-card p {
  font-size: 15px;
  line-height: 1.65;
  color: var(--muted-2);
}

.pain-card__num {
  width: 46px;
  height: 46px;
  border-radius: 15px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 17px;
}

.pain-card--peach {
  background: #fff7f3;
  border: 1px solid #ffe7db;
}
.pain-card--peach .pain-card__num {
  background: #ffe1d0;
  color: var(--brand-dark);
}

.pain-card--blue {
  background: #f5f8ff;
  border: 1px solid #e2eafb;
}
.pain-card--blue .pain-card__num {
  background: #dfe9fe;
  color: var(--blue);
}

.pain-card--green {
  background: #f3fbf5;
  border: 1px solid #dff2e5;
}
.pain-card--green .pain-card__num {
  background: #d9f2e2;
  color: var(--green);
}

.pain-card--violet {
  background: #fbf6ff;
  border: 1px solid #eee3fa;
}
.pain-card--violet .pain-card__num {
  background: #ede0fb;
  color: var(--violet);
}

/* --------------------------------------------------------------------------
   Benefits
   -------------------------------------------------------------------------- */

.benefits {
  display: flex;
  flex-direction: column;
  gap: 22px;
  margin-top: 50px;
}

.benefit-hero {
  background: #fff;
  border: 1px solid var(--line-card);
  border-radius: 28px;
  padding: 40px 44px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 32px;
  align-items: center;
  box-shadow: 0 20px 50px -34px rgba(23, 27, 35, 0.35);
}

.benefit-hero .device {
  justify-self: center;
}

.benefit-hero h3 {
  margin-bottom: 12px;
  font-size: clamp(24px, 2.6vw, 30px);
  font-weight: 800;
  letter-spacing: -0.025em;
}

.benefit-hero p {
  font-size: 17px;
  line-height: 1.7;
  color: var(--muted);
  max-width: 520px;
}

.benefit-hero .device {
  width: clamp(130px, 15vw, 182px);
}

.benefit-card {
  background: #fff;
  border: 1px solid var(--line-card);
  border-radius: 28px;
  padding: 32px;
}

.benefit-card .icon-badge {
  width: 44px;
  height: 44px;
  border-radius: 14px;
}

.benefit-card h3 {
  margin: 18px 0 8px;
  font-size: 20px;
  font-weight: 700;
}

.benefit-card p {
  font-size: 15px;
  line-height: 1.65;
  color: var(--muted-2);
}

/* --------------------------------------------------------------------------
   How it works
   -------------------------------------------------------------------------- */

.how {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 56px;
  margin-top: 50px;
  align-items: center;
}

.steps {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.step {
  display: flex;
  gap: 18px;
  background: var(--cream);
  border: 1px solid var(--line-peach);
  border-radius: 20px;
  padding: 22px 24px;
}

.step__num {
  flex: none;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  background: var(--brand-grad);
  color: #fff;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step h3 {
  margin: 5px 0 6px;
  font-size: 18px;
  font-weight: 700;
}

.step p {
  font-size: 15px;
  line-height: 1.6;
  color: var(--muted-2);
}

.how__visual {
  position: relative;
  display: flex;
  gap: 22px;
  justify-content: center;
  align-items: center;
  min-width: 0;
  flex-wrap: wrap;
  padding: 20px 0;
}

.how__glow {
  position: absolute;
  inset: 0;
  border-radius: 48px;
  background: radial-gradient(70% 60% at 50% 40%, rgba(255, 154, 70, 0.2), rgba(255, 154, 70, 0) 70%);
  pointer-events: none;
}

.how__visual .device {
  position: relative;
  width: clamp(170px, 19vw, 240px);
}

.how__visual .device:first-of-type {
  transform: translateY(-20px);
}

.how__visual .device:last-of-type {
  transform: translateY(20px);
}

/* --------------------------------------------------------------------------
   Features
   -------------------------------------------------------------------------- */

.feature-card {
  background: #fff;
  border: 1px solid var(--line-card);
  border-radius: 24px;
  padding: 30px;
}

.feature-card h3 {
  margin: 18px 0 8px;
  font-size: 20px;
  font-weight: 700;
}

.feature-card p {
  font-size: 15px;
  line-height: 1.65;
  color: var(--muted-2);
}

.shot-tiles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  margin-top: 22px;
}

.shot-tile {
  border-radius: 24px;
  padding: 28px 22px 0;
  display: flex;
  justify-content: center;
  overflow: hidden;
}

.shot-tile .device {
  max-width: 208px;
}

.shot-tile--peach {
  background: linear-gradient(180deg, #ffe9da 0%, #fff9f5 100%);
  border: 1px solid #f6e0d2;
}

.shot-tile--blue {
  background: linear-gradient(180deg, #e4edff 0%, #fff9f5 100%);
  border: 1px solid #dee7f9;
}

.shot-tile--green {
  background: linear-gradient(180deg, #dff3e7 0%, #fff9f5 100%);
  border: 1px solid #d8eee2;
}

/* --------------------------------------------------------------------------
   Audience (dark)
   -------------------------------------------------------------------------- */

.audience {
  padding: 96px var(--gutter);
  background: var(--ink);
  color: #fff;
}

.audience__inner {
  max-width: var(--shell);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 56px;
  align-items: center;
}

.audience .eyebrow {
  background: #2a303c;
  color: #ffa972;
}

.audience h2 {
  margin: 16px 0 26px;
  font-size: clamp(26px, 3.2vw, 40px);
  line-height: 1.16;
  letter-spacing: -0.035em;
  font-weight: 800;
  text-wrap: balance;
}

.audience__list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.audience__list li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.audience__list p {
  font-size: 16.5px;
  line-height: 1.6;
  color: #d3d8e0;
}

.tick {
  flex: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 3px;
}

.tick svg {
  width: 12px;
  height: 12px;
}

.audience__visual {
  display: flex;
  gap: 20px;
  justify-content: center;
  min-width: 0;
  flex-wrap: wrap;
}

.audience__visual .device {
  width: clamp(180px, 20vw, 246px);
}

.audience__visual .device:last-of-type {
  transform: translateY(34px);
}

/* --------------------------------------------------------------------------
   Testimonials
   -------------------------------------------------------------------------- */

.quote-card {
  background: var(--cream);
  border: 1px solid var(--line-peach);
  border-radius: 26px;
  padding: 32px;
}

.quote-card p {
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink-2);
}

.quote-card__author {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-top: 22px;
}

.quote-card__avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #f0e4db;
  border: 1px dashed #d9c6b8;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  color: #a08e80;
  text-align: center;
  line-height: 1.2;
  flex: none;
}

.quote-card__author strong {
  display: block;
  font-size: 15px;
  font-weight: 700;
}

.quote-card__author span {
  display: block;
  font-size: 14px;
  color: var(--muted-3);
}

/* --------------------------------------------------------------------------
   Security
   -------------------------------------------------------------------------- */

.security {
  max-width: var(--shell);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 56px;
  align-items: start;
}

.security__links {
  display: flex;
  gap: 18px;
  margin-top: 24px;
  flex-wrap: wrap;
  font-weight: 600;
  font-size: 15px;
}

.security__list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.security__list li {
  background: #fff;
  border: 1px solid var(--line-card);
  border-radius: 18px;
  padding: 20px 22px;
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink-2);
}

/* --------------------------------------------------------------------------
   FAQ
   -------------------------------------------------------------------------- */

.faq {
  max-width: 860px;
  margin: 0 auto;
}

.faq h2 {
  margin-bottom: 40px;
  font-size: clamp(28px, 3.4vw, 42px);
  line-height: 1.15;
  letter-spacing: -0.035em;
  font-weight: 800;
  text-align: center;
}

.faq__list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq__item {
  background: var(--cream);
  border: 1px solid var(--line-peach);
  border-radius: 20px;
  padding: 24px 26px;
}

.faq__q {
  display: flex;
  gap: 20px;
  align-items: center;
  width: 100%;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  color: inherit;
}

.faq__q h3 {
  font-size: 19px;
  font-weight: 700;
  flex: 1;
  min-width: 0;
}

.faq__sign {
  flex: none;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: #ffe1d0;
  color: var(--brand-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.22s ease;
}

.faq__sign svg {
  width: 14px;
  height: 14px;
}

.faq__q[aria-expanded="true"] .faq__sign {
  transform: rotate(45deg);
}

.faq__a {
  display: none;
  margin-top: 14px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--muted);
}

.faq__item.is-open .faq__a {
  display: block;
}

/* --------------------------------------------------------------------------
   Download CTA
   -------------------------------------------------------------------------- */

.download {
  padding: 30px var(--gutter) 96px;
  background: #fff;
}

.download__card {
  max-width: var(--shell);
  margin: 0 auto;
  position: relative;
  border-radius: 36px;
  padding: 72px 40px;
  background: var(--brand-grad);
  color: #fff;
  text-align: center;
  overflow: hidden;
}

.download__card::before,
.download__card::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  /* Vòng trang trí luôn nằm DƯỚI nội dung (.download__inner z-index: 1) */
  z-index: 0;
  pointer-events: none;
}

.download__card::before {
  top: -120px;
  left: -60px;
  width: 340px;
  height: 340px;
  background: rgba(255, 255, 255, 0.12);
}

.download__card::after {
  bottom: -160px;
  right: -40px;
  width: 400px;
  height: 400px;
  background: rgba(255, 255, 255, 0.1);
}

.download__inner {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 0 auto;
}

.download__inner h2 {
  font-size: clamp(28px, 3.8vw, 46px);
  line-height: 1.12;
  letter-spacing: -0.035em;
  font-weight: 800;
  text-wrap: balance;
}

.download__inner p {
  margin: 18px auto 0;
  font-size: 18px;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.92);
  max-width: 600px;
}

.store-row {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 30px;
  flex-wrap: wrap;
}

.store-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 26px;
  border-radius: 16px;
  background: var(--ink);
  color: #fff;
  text-align: left;
  transition: transform 0.18s ease;
}

.store-btn:hover {
  color: #fff;
  transform: translateY(-2px);
}

.store-btn svg {
  width: 24px;
  height: 28px;
  flex: none;
}

.store-btn small {
  display: block;
  font-size: 11.5px;
  line-height: 1.2;
  opacity: 0.75;
  font-weight: 500;
}

.store-btn strong {
  display: block;
  font-size: 17px;
  line-height: 1.25;
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.site-footer {
  background: var(--ink);
  color: #fff;
  padding: 70px var(--gutter) 34px;
}

.site-footer__grid {
  max-width: var(--shell);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr repeat(4, minmax(0, 1fr));
  gap: 40px;
}

.site-footer .brand {
  color: #fff;
}

.site-footer .brand span {
  font-size: 18px;
}

.site-footer .brand img {
  width: 36px;
  height: 36px;
}

.site-footer__about {
  margin-top: 16px;
  font-size: 15px;
  line-height: 1.65;
  color: #9aa2b0;
  max-width: 280px;
}

.site-footer h4 {
  margin-bottom: 14px;
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.site-footer__links {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 15px;
  color: #9aa2b0;
}

.site-footer__links a {
  color: #9aa2b0;
}

.site-footer__links a:hover {
  color: #fff;
}

.site-footer__bottom {
  max-width: var(--shell);
  margin: 44px auto 0;
  padding-top: 24px;
  border-top: 1px solid #262c36;
  font-size: 14px;
  color: #78808e;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1180px) {
  .site-nav {
    gap: 16px;
    font-size: 14.5px;
  }
}

@media (max-width: 1023px) {
  .site-header__inner {
    flex-wrap: wrap;
    gap: 12px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    display: none;
    order: 3;
    width: 100%;
    margin-left: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 8px 0 6px;
    border-top: 1px solid var(--line);
  }

  body.nav-open .site-nav {
    display: flex;
  }

  .site-nav a {
    padding: 10px 2px;
    font-size: 16px;
  }

  .site-header .btn--sm {
    display: none;
  }

  body.nav-open .site-header .btn--sm {
    display: inline-flex;
    order: 4;
    align-self: stretch;
    margin-bottom: 6px;
  }

  .hero__inner,
  .how,
  .audience__inner,
  .security {
    grid-template-columns: minmax(0, 1fr);
    gap: 40px;
  }

  .hero {
    padding-bottom: 64px;
  }

  .hero__text {
    max-width: none;
  }

  /* Collage: bỏ absolute, xếp 3 máy chồng nhẹ cho vừa màn hẹp */
  .collage {
    height: auto;
    display: flex;
    justify-content: center;
    align-items: center;
    padding-top: 8px;
  }

  .collage__phone {
    position: static;
    height: auto;
    width: 30%;
    max-width: 230px;
  }

  .collage__phone .device {
    height: auto;
  }

  .collage__phone .device img {
    height: auto;
    width: 100%;
  }

  .collage__phone--2,
  .collage__phone--3,
  .collage__phone--4 {
    display: none;
  }

  /* order: máy chính nằm giữa (trong DOM nó đứng cuối) */
  .collage__phone--1 {
    order: 1;
    transform: rotate(-8deg) translateY(14px);
    margin-right: -5%;
  }

  .collage__phone--hero {
    order: 2;
    width: 36%;
    max-width: 268px;
    z-index: 6;
  }

  .collage__phone--5 {
    order: 3;
    transform: rotate(8deg) translateY(14px);
    margin-left: -5%;
  }

  .chip {
    display: none;
  }

  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid--3,
  .shot-tiles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .benefit-hero {
    grid-template-columns: minmax(0, 1fr);
    padding: 32px;
    text-align: left;
  }

  .benefit-hero .device {
    justify-self: center;
    width: clamp(150px, 34vw, 200px);
  }

  .how__visual .device:first-of-type,
  .how__visual .device:last-of-type {
    transform: none;
  }

  .audience__visual .device:last-of-type {
    transform: none;
  }

  .site-footer__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px;
  }
}

@media (max-width: 640px) {
  :root {
    --gutter: 20px;
  }

  .section,
  .audience {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .download {
    padding-bottom: 64px;
  }

  .grid--4,
  .grid--3,
  .grid--2,
  .shot-tiles {
    grid-template-columns: minmax(0, 1fr);
  }

  .shot-tiles {
    gap: 16px;
  }

  .hero__stats-divider {
    display: none;
  }

  .hero__actions .btn {
    flex: 1 1 100%;
  }

  .collage__phone {
    width: 34%;
  }

  .collage__phone--hero {
    width: 40%;
  }

  .benefit-card,
  .feature-card,
  .quote-card,
  .pain-card {
    padding: 26px 22px;
  }

  .benefit-hero {
    padding: 26px 22px;
  }

  .step {
    padding: 20px;
    gap: 14px;
  }

  .faq__item {
    padding: 20px;
  }

  .faq__q h3 {
    font-size: 17px;
  }

  .download__card {
    padding: 48px 22px;
    border-radius: 28px;
  }

  .store-row .store-btn {
    flex: 1 1 100%;
    justify-content: center;
  }

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .chip {
    animation: none;
  }

  .btn:hover,
  .store-btn:hover {
    transform: none;
  }
}