/* ===================================================================
   VN Creative — clone
   Palette based on the live Elementor kit:
   brand blue #3D60FA · light blue #6EC1E4 · green #61CE70
   text #7A7A7A · heading #14192b · font Montserrat
==================================================================== */

:root {
  --blue: #3b5998;
  --blue-dark: #3b5998;
  --blue-light: #6ec1e4;
  --green: #61ce70;
  --ink: #ffffff;
  --ink-2: #c9cfe6;
  --text: #97a0c0;
  --muted: #6f7699;
  --bg: #070a15;
  --bg-soft: #0d1226;
  --bg-soft-2: #151b34;
  --border: #232a45;
  --card: #0f1428;
  --star: #ffc043;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  --shadow-sm: 0 8px 26px rgba(0, 0, 0, 0.3);
  --container: 1180px;
  --header-h: 76px;
  --font:
    "Montserrat", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
h1,
h2,
h3,
h4 {
  color: var(--ink);
  line-height: 1.25;
  font-weight: 800;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: 88px 0;
}
.accent {
  color: var(--blue);
}

.tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue);
  background: var(--bg-soft-2);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.section__head {
  max-width: 820px;
  margin: 0 auto 52px;
  text-align: center;
}
.section__title {
  font-size: clamp(1.7rem, 3.2vw, 2.5rem);
  letter-spacing: -0.01em;
}
.section__sub {
  margin-top: 14px;
  font-size: 1.05rem;
}
.stars {
  color: var(--star);
  letter-spacing: 2px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  font-family: var(--font);
  cursor: pointer;
  border-radius: 999px;
  border: 2px solid transparent;
  padding: 13px 30px;
  font-size: 0.95rem;
  transition:
    transform 0.2s ease,
    background 0.2s ease,
    box-shadow 0.2s ease,
    color 0.2s ease;
  white-space: nowrap;
}
.btn--primary {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 10px 24px rgba(61, 96, 250, 0.28);
}
.btn--primary:hover {
  background: var(--blue-dark);
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(61, 96, 250, 0.36);
}
.btn--outline {
  background: transparent;
  color: var(--blue);
  border-color: var(--blue);
}
.btn--outline:hover {
  background: var(--blue);
  color: #fff;
}
.btn--sm {
  padding: 9px 20px;
  font-size: 0.85rem;
}
.btn--lg {
  padding: 16px 38px;
  font-size: 1.05rem;
}

/* ---------- Header ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(7, 10, 21, 0.82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: 24px;
}
.header__logo img {
  height: 48px;
  width: auto;
  filter: brightness(0) invert(1); /* logo đen -> trắng trên header tối; bỏ dòng này nếu muốn giữ màu gốc */
}
.logo-text {
  font-weight: 900;
  font-size: 1.4rem;
  letter-spacing: -0.02em;
  color: #fff;
  line-height: 1;
}
.logo-text > span {
  color: var(--blue);
}
.logo-text--footer {
  display: inline-block;
  font-size: 1.5rem;
  margin-bottom: 18px;
}
.nav {
  display: flex;
  align-items: center;
  gap: 30px;
}
.nav__link {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--ink-2);
  position: relative;
  transition: color 0.2s;
}
.nav__link:hover {
  color: var(--blue);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  background: var(--blue);
  transition: width 0.25s;
}
.nav__link:hover::after {
  width: 100%;
}
.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.burger span {
  width: 24px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: 0.3s;
}
.burger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.burger.active span:nth-child(2) {
  opacity: 0;
}
.burger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(
      900px 520px at 85% -10%,
      rgba(91, 123, 255, 0.22),
      transparent 60%
    ),
    radial-gradient(
      760px 520px at 0% 0%,
      rgba(110, 193, 228, 0.12),
      transparent 55%
    ),
    var(--bg);
  padding: 64px 0 72px;
}
.hero__inner {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}
.hero__reviews {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 26px;
}
.hero__avatars {
  display: flex;
}
.hero__avatars img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid #fff;
  margin-left: -12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}
.hero__avatars img:first-child {
  margin-left: 0;
}
.hero__reviews-text {
  display: flex;
  flex-direction: column;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink-2);
  line-height: 1.3;
}
.hero__title {
  font-size: clamp(2rem, 4.4vw, 3.15rem);
  letter-spacing: -0.02em;
  font-weight: 900;
}
.hero__desc {
  margin: 22px 0 32px;
  font-size: 1.1rem;
  max-width: 540px;
}

.hero__media {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  height: 520px;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(
    to bottom,
    transparent,
    #000 12%,
    #000 88%,
    transparent
  );
  mask-image: linear-gradient(
    to bottom,
    transparent,
    #000 12%,
    #000 88%,
    transparent
  );
}
.hero__col {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.hero__col img {
  width: 100%;
  aspect-ratio: 9/16;
  object-fit: cover;
  border-radius: 14px;
  box-shadow: var(--shadow-sm);
}
.hero__col--up {
  animation: scrollUp 26s linear infinite;
}
.hero__col--down {
  animation: scrollDown 26s linear infinite;
}
.hero__col--third {
  animation-duration: 32s;
}
@keyframes scrollUp {
  from {
    transform: translateY(0);
  }
  to {
    transform: translateY(-50%);
  }
}
@keyframes scrollDown {
  from {
    transform: translateY(-50%);
  }
  to {
    transform: translateY(0);
  }
}

/* ---------- Logo marquee (small) ---------- */
.brands {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 26px 0;
  overflow: hidden;
  background: var(--bg-soft);
  -webkit-mask-image: linear-gradient(
    to right,
    transparent,
    #000 6%,
    #000 94%,
    transparent
  );
  mask-image: linear-gradient(
    to right,
    transparent,
    #000 6%,
    #000 94%,
    transparent
  );
}
.brands__row {
  display: flex;
  align-items: center;
  gap: 60px;
  width: max-content;
  animation: marquee 30s linear infinite;
}
.brands:hover .brands__row {
  animation-play-state: paused;
}
.brands__row img {
  height: 34px;
  width: auto;
  object-fit: contain;
  filter: brightness(0) invert(1);
  opacity: 0.5;
  transition: 0.3s;
}
.brands__row img:hover {
  opacity: 1;
}
@keyframes marquee {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-50%);
  }
}

/* ---------- Why ---------- */
.why {
  background: var(--bg-soft);
}
.why__inner {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 56px;
  align-items: center;
}
.why__media img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  width: 100%;
  object-fit: cover;
}
.why__content p {
  margin-bottom: 16px;
}
.why__content strong {
  color: var(--ink);
}

/* ---------- Results ---------- */
.results {
  overflow: hidden;
}
.results__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 56px;
}
.stat {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  text-align: center;
}
.stat__num {
  display: block;
  font-size: 3.2rem;
  font-weight: 900;
  color: var(--ink);
  line-height: 1;
  margin-bottom: 14px;
}
.stat__label {
  font-size: 0.98rem;
}
.results__logos {
  display: flex;
  align-items: center;
  gap: 26px;
  width: max-content;
  animation: marquee 55s linear infinite;
  margin-top: 24px;
}
.results:hover .results__logos {
  animation-play-state: paused;
}
.results__logos img {
  height: 380px;
  width: auto;
  object-fit: contain;
  border-radius: 22px;
  box-shadow: 0 22px 55px rgba(0, 0, 0, 0.55);
  transition: transform 0.3s ease;
}
.results__logos img:hover {
  transform: translateY(-12px) scale(1.03);
}

/* ---------- Reasons ---------- */
.reasons {
  background: var(--bg-soft);
}
.reasons__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}
.reason {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 34px;
  box-shadow: var(--shadow-sm);
  transition:
    transform 0.25s,
    box-shadow 0.25s;
}
.reason:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.reason__no {
  display: inline-block;
  font-size: 1.05rem;
  font-weight: 800;
  color: #fff;
  background: var(--blue);
  width: 44px;
  height: 44px;
  line-height: 44px;
  text-align: center;
  border-radius: 12px;
  margin-bottom: 18px;
}
.reason h3 {
  font-size: 1.22rem;
  margin-bottom: 12px;
}

/* ---------- Products ---------- */
.products__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.product {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition:
    transform 0.25s,
    box-shadow 0.25s;
}
.product:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}
.product__img {
  display: block;
  overflow: hidden;
  aspect-ratio: 16/10;
}
.product__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}
.product:hover .product__img img {
  transform: scale(1.06);
}
.product h3 {
  font-size: 1.2rem;
  padding: 22px 24px 0;
}
.product h3 a:hover {
  color: var(--blue);
}
.product p {
  padding: 12px 24px 20px;
  flex: 1;
}
.product .btn {
  margin: 0 24px 26px;
}

/* ---------- Feedbacks ---------- */
.feedbacks {
  background: var(--bg-soft);
}
.feedbacks__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.feedback {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}
.feedback .stars {
  font-size: 1rem;
  margin-bottom: 14px;
}
.feedback p {
  flex: 1;
  color: var(--ink-2);
  font-size: 0.96rem;
}
.feedback__author {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}
.feedback__author img {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  object-fit: cover;
}
.feedback__author h4 {
  font-size: 1rem;
}
.feedback__author span {
  font-size: 0.82rem;
  color: var(--muted);
}

/* ---------- FAQ ---------- */
.faq__list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq__item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  transition: box-shadow 0.25s;
}
.faq__item[open] {
  box-shadow: var(--shadow-sm);
  border-color: #cdd6ff;
}
.faq__item summary {
  list-style: none;
  cursor: pointer;
  padding: 20px 26px;
  font-weight: 700;
  color: var(--ink);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 1.02rem;
}
.faq__item summary::-webkit-details-marker {
  display: none;
}
.faq__item summary::after {
  content: "+";
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--blue);
  transition: transform 0.3s;
  flex-shrink: 0;
}
.faq__item[open] summary::after {
  transform: rotate(45deg);
}
.faq__body {
  padding: 0 26px 22px;
}

/* ---------- CTA ---------- */
.cta {
  background: linear-gradient(
    120deg,
    var(--blue),
    #5b7bff 60%,
    var(--blue-light)
  );
  text-align: center;
}
.cta__inner {
  max-width: 720px;
  margin: 0 auto;
}
.cta h2 {
  color: #fff;
  font-size: clamp(1.6rem, 3vw, 2.3rem);
}
.cta p {
  color: rgba(255, 255, 255, 0.9);
  margin: 16px 0 30px;
  font-size: 1.1rem;
}
.cta .btn--primary {
  background: #fff;
  color: var(--blue);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.18);
}
.cta .btn--primary:hover {
  background: #f0f3ff;
  color: var(--blue-dark);
}

/* ---------- Footer ---------- */
.footer {
  background: #0f1424;
  color: #c4c8d6;
  padding: 64px 0 0;
}
.footer__inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer__brand img {
  height: 26px;
  margin-bottom: 18px;
  filter: brightness(0) invert(1);
}
.footer__brand p {
  max-width: 360px;
  margin-bottom: 20px;
}
.footer__social {
  display: flex;
  gap: 22px;
}
.footer__social a {
  font-weight: 600;
  font-size: 0.9rem;
  color: #c4c8d6;
  transition: color 0.2s;
}
.footer__social a:hover {
  color: var(--blue-light);
}
.footer__contact h4 {
  color: #fff;
  margin-bottom: 18px;
}
.footer__contact ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 0.92rem;
}
.footer__contact a:hover {
  color: var(--blue-light);
}
.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
  font-size: 0.85rem;
  color: var(--muted);
}
.footer__bottom a {
  color: var(--blue-light);
}

/* ---------- To-top ---------- */
.to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: 0 8px 22px rgba(61, 96, 250, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: 0.3s;
  z-index: 90;
}
.to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .products__grid,
  .feedbacks__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 980px) {
  .hero__inner {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .hero__media {
    height: 420px;
    max-width: 520px;
  }
  .why__inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .why__media {
    order: -1;
  }
  .results__grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .reasons__grid {
    grid-template-columns: 1fr;
  }
  .footer__inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .results__logos img {
    height: 300px;
  }
}
@media (max-width: 760px) {
  .section {
    padding: 60px 0;
  }
  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    background: var(--bg-soft);
    padding: 20px 24px;
    gap: 4px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    transform: translateY(-130%);
    transition: transform 0.3s;
    align-items: stretch;
  }
  .nav.open {
    transform: translateY(0);
  }
  .nav__link {
    padding: 14px 4px;
    border-bottom: 1px solid var(--border);
  }
  .nav__link::after {
    display: none;
  }
  .header__cta {
    display: none;
  }
  .burger {
    display: flex;
  }
  .hero__media {
    grid-template-columns: repeat(3, 1fr);
    height: 300px;
    gap: 10px;
    max-width: 100%;
  }
  .products__grid,
  .feedbacks__grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .brands__row img {
    height: 28px;
  }
  .stat__num {
    font-size: 2.6rem;
  }
}
@media (max-width: 420px) {
  .hero__media {
    height: 240px;
  }
  .results__logos img {
    height: 220px;
  }
  .logo-text {
    font-size: 1.2rem;
  }
}