/* Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* DESKTOP CSS */
html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  font-family: "Montserrat", Arial, Helvetica, sans-serif;
}

.desktop {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  width: 100%;
  background: url("./images/background.png") no-repeat center center;
  background-size: cover;
  background-color: #161920;
  position: relative;
  overflow-y: auto;
  /* overflow: hidden; */
}

.menu-container {
  display: flex;
  flex-direction: column;
  flex: 1;
  width: 100%;
  max-width: 1920px;
  margin: 0 auto;
  padding: 2vh 3vw;
  padding-bottom: 20px;
}

.title-group {
  width: 100%;
  text-align: center;
  margin-top: 2vh;
  /*margin-bottom: -72px;*/
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0vh;
}

.title-img {
  width: 15%;
  height: auto;
}

.social-icons {
  position: fixed;
  right: 2vw;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: -3.5vh;
  z-index: 100;
}

.social-icon {
  width: clamp(40px, 3.5vw, 70px);
  height: clamp(40px, 3.5vw, 70px);
  cursor: pointer;
  transition: transform 0.3s ease;
}

.social-icon:nth-child(2) {
  margin: 20px 0;
}

.social-icon:hover {
  /* transform: scale(1.1); */
}

.social-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border: 2px solid rgba(255, 255, 255, 0.8);
  border-radius: 50%;
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.3);
}

/*Link Items*/
@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.neon-text {
  font-size: 40px;
  font-weight: 900;
  text-transform: uppercase;
  color: #fff;
  letter-spacing: 2px;
  text-align: center;
  -webkit-text-stroke: 2px #00cfff;
  paint-order: stroke fill;
  filter: drop-shadow(0 0 3px #00cfff) drop-shadow(0 0 7px #007fff) drop-shadow(0 0 15px #0044ff);
  animation: pulse 2.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    filter: drop-shadow(0 0 3px #00cfff) drop-shadow(0 0 7px #007fff) drop-shadow(0 0 15px #0044ff);
  }
  50% {
    filter: drop-shadow(0 0 3px #00efff) drop-shadow(0 0 24px #00aaff) drop-shadow(0 0 25px #0055ff) drop-shadow(0 0 35px #003aaa);
  }
}

.link-items {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  flex-direction: row;
  align-items: flex-end;
  justify-content: center;
  gap: 1.5rem;
  padding: 0 1rem 1rem;
  flex-wrap: wrap;
}

.link-item:hover {
  transform: scale(1.08);
  transition: transform 0.25s ease;
}

.link-item {
  transition: transform 0.25s ease;
}

.link-divider {
  width: 2px;
  height: 140px;
  border-left: 2px dashed #ccc;
  align-self: center;
  opacity: 0.5;
}

.link-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  cursor: pointer;
}

.link-circle {
  position: relative;
  width: 150px;
  height: 150px;
  overflow: hidden;
}

/* Ring 1 — outer, full solid */
.link-ring-1 {
  position: absolute;
  inset: 0;
  overflow: hidden;
  object-fit: cover;
  opacity: 1;
  width: 100%;
  height: 100%;
}

.link-ring-1 img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  animation: spin 6s linear infinite;
}

/* Ring 2 — middle, nhiều răng cưa dùng repeating-conic-gradient */
.link-ring-2 {
  position: absolute;
  inset: 8px;
  border-radius: 50%;
  background: linear-gradient(180deg, #3AFFB0, #D5D5D5);
  -webkit-mask: repeating-conic-gradient(#000 0deg 4deg, transparent 4deg 6deg),
  radial-gradient(farthest-side, transparent calc(100% - 5px), #000 calc(100% - 5px));
  mask: repeating-conic-gradient(#000 0deg 4deg, transparent 4deg 6deg),
  radial-gradient(farthest-side, transparent calc(100% - 5px), #000 calc(100% - 5px));
  -webkit-mask-composite: intersect;
  mask-composite: intersect;
  opacity: 0.9;
}

/* Ring 3 — inner, 70% arc, spinning */
/* Uses conic-gradient + radial-gradient mask to create a partial arc ring */
.link-ring-3 {
  position: absolute;
  inset: 22px;
  border-radius: 50%;
  background: conic-gradient(var(--color) 252deg, transparent 252deg);
  -webkit-mask: radial-gradient(farthest-side, transparent calc(100% - 5px), #000 calc(100% - 5px));
  mask: radial-gradient(farthest-side, transparent calc(100% - 5px), #000 calc(100% - 5px));
  animation: spin 2s linear infinite;
}

/* Center content */
.link-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  /*inset: 20px;*/
  /*border-radius: 50%;*/
  /*background: radial-gradient(47.14% 47.14% at 50% 52.86%, #2AFFB9 0%, #24C38F 100%), #FFF;*/
  /*box-shadow: 0 -2px 6px 0 #68FFCE inset, 0 2px 4px 0 #83FFD7 inset, 0 0 10px 0 #008258;*/
  display: flex;
  align-items: center;
  justify-content: center;
}

.link-ms {
  color: #2B8EFF;
  font-weight: 700;
  font-size: 30px;
  letter-spacing: 0.5px;
}

.link-label img {
  width: 100%;
}

.link-label {
  position: relative;
  color: #2B8EFF;
  font-weight: 700;
  font-size: 22px;
  /*letter-spacing: 1px;*/
}

.link-text {
  position: absolute;
  top: 44%;
  left: 40%;
  transform: translate(-50%, -50%);
}

/*Link Section*/
.link-section {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.link-section img {
  max-width: 55rem;
  max-height: 22rem;
  object-fit: contain;
}

.link-join {
  margin-top: -6rem;
  background: #fff;
  position: relative;
  border: 8px solid #FFA4D1;
  border-radius: 16px;
  padding: 40px 40px 0 40px
}

.link-join-img {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
}

/* section-desktop */
.section-desktop {
  display: flex;
  justify-content: center;
  align-items: flex-end;
}

.section-left-banner img {
  width: 100%;
  object-fit: cover;
}

.section-left {
  width: auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.download-app {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, #003D8D, #100061);
  border-radius: 15px;
  padding: 20px;
  width: 100%;
  gap: 10px;
}
.download-app.show-desktop {
  display: flex;
}
.download-app.show-mobile {
  display: none;
}


.icon-ios {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  width: 100%;
}
.icon-ios img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.section-right {
  width: auto;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  flex-shrink: 0;
}

.banner-right {
  width: clamp(280px, 35vw, 520px);
  height: auto;
  object-fit: contain;
  display: block;
}

.banner-right-bottom {
  position: absolute;
  bottom: 0px;
  left: 50%;
  transform: translateX(-50%);
  width: 90%;
  height: auto;
  object-fit: contain;
}


.download-app-qr {
  flex: 1;
}

.download-app-qr img {
  width: 100%;
  object-fit: cover;
}


/*End Link Section*/
/*Download*/
.download-section {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
}

.download-section .image {
  max-width: 62.5rem;
}

.download-section .image img {
  width: 100%;
  height: 100%;
}

.download-btn {
  position: absolute;
  display: flex;
  gap: 1rem;
  align-items: center;
  bottom: 1rem;
}

.download-btn img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.download-btn .button-download-ios {

}

.download-btn .button-download-android {

}

.download-section-mobile {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
}

.download-section-mobile .image {
  max-width: 100%;
  width: 100%;
}

.download-section-mobile .image img {
  width: 100%;
  height: 100%;
}

.download-btn-mobile {
  position: absolute;
  display: flex;
  gap: 16px;
  align-items: center;
  bottom: 1rem;
  left: 5%;
}

.download-btn-mobile img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.download-btn-mobile .button-download-ios {
  height: 45px;
  width: 100px;
}

.download-btn-mobile .button-download-android {
  height: 45px;
  width: 100px;
}

/*End Download*/

/* Social Buttons */
.social {
  display: none;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
  align-items: center;
}

.social-row {
  display: flex;
  flex-direction: row;
  gap: 10px;
  justify-content: space-between;
}

.social-btn-link {
  display: inline-block;
  cursor: pointer;
  transition: transform 0.2s ease, filter 0.2s ease;
}

.social-btn-link img {
  /*height: 44px;*/
  width: 100%;
  display: block;
  object-fit: contain;
}

.social-btn-link:hover {
  transform: scale(1.06);
  filter: brightness(1.05);
}

/* End Social Buttons */
@media (max-width: 344px) {
  .banner-right {
    width: 100%;
  }
  .download-app.show-desktop {
    display: none;
  }
  .download-app.show-mobile {
    display: flex;
  }
  .download-btn-mobile {
    left: 0;
  }

  .download-btn-mobile .button-download-ios {
    height: 35px;
    width: 100px;
  }

  .download-btn-mobile .button-download-android {
    height: 35px;
    width: 100px;
  }
}

@media (max-width: 767px) {
  .banner-right {
    width: 100%;
  }
  .download-app.show-desktop {
    display: none;
  }
  .download-app.show-mobile {
    display: flex;
  }
  .box-text {
    display: flex;
    justify-content: center;
  }

  .neon-text {
    font-size: 7.5vw;
    max-width: 18ch;
    white-space: normal;
    display: inline-block;
    text-align: center;
  }

  .section-desktop {
    flex-direction: column;
    align-items: center;
    /*display: unset;*/
    margin-top: 15px;
    gap: 10px;
  }

  .download-app {
    padding: 8px 10px;
  }

  .title-img {
    width: 60%;
  }

  .link-section img {
    width: 100%;
    height: 100%;
  }

  .link-join {
    margin-top: -2.5rem;
    width: 100%;
    padding: 30px 12px 12px;
  }

  .link-items {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    justify-items: center;
    gap: 0.5rem;
    padding: 1.2rem 0.5rem;
  }

  .link-divider {
    display: none;
  }

  .link-circle {
    width: 100px;
    height: 100px;
  }

  .link-ms {
    font-size: 1rem;
  }

  .link-label {
    font-size: 0.8rem;
  }

  .download-section {
    display: none;
  }

  .download-section-mobile {
    display: flex;
  }

  .social {
    display: flex;
  }

  .download-btn .button-download-ios {
    height: 30px;
  }

  .download-btn .button-download-android {
    height: 30px;
  }

  .social-icons {
    display: none;
  }
}

@media (min-width: 768px) and (max-width: 1024px) {
  .box-text {
    display: flex;
    justify-content: center;
    margin-top: 30px;
  }
  .section-left {
    width: 100%;
  }
  .section-right {
    width: 100%;
  }
  .banner-right {
    width: 100%;
  }
  .download-app.show-desktop {
    display: none;
  }
  .download-app.show-mobile {
    display: flex;
  }
  .section-desktop {
    flex-direction: column;
    align-items: center;
    /*display: unset;*/
    margin-top: 15px;
    gap: 10px;
  }

  .title-img {
    width: 40%;
  }

  .link-section img {
    width: 100%;
    height: 100%;
  }

  .link-join {
    margin-top: -4.5rem;
    width: 100%;
    padding: 36px 16px 16px;
  }

  .link-items {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    justify-items: center;
    gap: 1.2rem;
    padding: 1.2rem 0.5rem;
  }

  .link-divider {
    display: none;
  }

  .link-circle {
    width: 180px;
    height: 180px;
  }

  .download-section {
    display: none;
  }

  .download-section-mobile {
    display: flex;
    padding: 0 16px;
  }

  .social {
    display: none;
  }

  .download-btn .button-download-ios {
    height: 65px;
  }

  .download-btn .button-download-android {
    height: 65px;
  }

  .download-btn-mobile {
    position: absolute;
    display: flex;
    gap: 16px;
    align-items: center;
    bottom: 1rem;
    left: 5%;
  }

  .download-btn-mobile img {
    width: 100%;
    height: 100%;
    object-fit: contain;
  }

  .download-btn-mobile .button-download-ios {
    height: 100%;
    width: 100%;
  }

  .download-btn-mobile .button-download-android {
    height: 100%;
    width: 100%;
  }
}

/* Nest Hub (1024×600) — desktop-like layout */
@media (min-width: 768px) and (max-width: 1024px) and (max-height: 600px) {
  .box-text {
    display: flex;
    justify-content: center;
    margin-top: 20px;
  }
  .section-left {
    width: 80%;
  }
  .section-right {
    width: 80%;
  }
  .link-items {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    justify-items: center;
    gap: 0.5rem;
    padding: 1.2rem 0.5rem;
  }
  /*.section-desktop {*/
  /*  flex-direction: column-reverse;*/
  /*}*/
  .title-img {
    width: 25%;
  }

  .link-circle {
    width: 110px;
    height: 110px;
  }

  .social-row {
    gap: 40px
  }
  .link-ms {
    font-size: 1.1rem;
  }

  .link-label {
    font-size: 0.9rem;
  }

  .download-section {
    display: flex;
    margin-top: 8px;
  }

  .download-section .image {
    max-width: 90%;
  }

  .download-btn {
    bottom: 1.4rem;
  }

  .download-btn .button-download-ios,
  .download-btn .button-download-android {
    height: 66px;
  }

  .download-section-mobile {
    display: none;
  }

  .social {
    display: flex;
  }

  .social-icons {
    display: none;
  }
}

/* Nest Hub Max (1280×800) — desktop-like layout */
@media (min-width: 1280px) and (max-width: 1280px) and (max-height: 800px) {
  .box-text {
    display: flex;
    justify-content: center;
    margin-top: 20px;
  }
  .link-section {
    margin-top: 30px;
  }
  .social {
    display: none;
  }

  .social-icons {
    display: flex;
  }

  .download-section-mobile {
    display: none;
  }

  .download-section {
    display: flex;
  }
}

/* iPad mini */
@media (min-width: 768px) and (max-width: 768px) and (min-height: 1024px) {
  .social-icons {
    display: none;
  }

  .social {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 36px;
    margin-top: 20px;
    width: 100%;
    padding: 0;
  }

  .social-row {
    display: flex;
    flex-direction: row;
    gap: 16px;
    justify-content: space-between;
    width: 100%;
  }

  .social-btn-link {
    flex: 1;
    max-width: 340px;
  }

  .social-btn-link img {
    width: 100%;
    height: auto;
    display: block;
  }
}

/* iPad Air */
@media (min-width: 820px) and (max-width: 820px) and (min-height: 1180px) {
  .title-img {
    width: 30%;
  }

  .social-icons {
    display: none;
  }

  .social {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    margin-top: 20px;
    width: 100%;
    padding: 0 24px;
    max-width: 820px;
  }

  .social-row {
    display: flex;
    flex-direction: row;
    gap: 16px;
    justify-content: space-between;
    width: 100%;
    max-width: 740px;
  }

  .social-btn-link {
    flex: 1;
    max-width: 360px;
  }

  .social-btn-link img {
    width: 100%;
    height: auto;
    display: block;
  }

  .download-btn-mobile {
    bottom: 2.5rem;
    left: 8%;
  }

  .download-btn-mobile .button-download-ios,
  .download-btn-mobile .button-download-android {
    height: 70px;
    width: 190px;
  }
}

/* iPad Pro 11" */
@media (min-width: 834px) and (max-width: 834px) and (min-height: 1194px) {

  .title-img {
    width: 28%;
  }

  .social-icons {
    display: none;
  }

  .social {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    margin-top: 20px;
    width: 100%;
    padding: 0 24px;
    max-width: 834px;
  }

  .social-row {
    display: flex;
    flex-direction: row;
    gap: 16px;
    justify-content: space-between;
    width: 100%;
    max-width: 760px;
  }

  .social-btn-link {
    flex: 1;
    max-width: 370px;
  }

  .social-btn-link img {
    width: 100%;
    height: auto;
    display: block;
  }

  .download-btn-mobile {
    bottom: 1.2rem;
    left: 6%;
  }

  .download-btn-mobile .button-download-ios,
  .download-btn-mobile .button-download-android {
    height: 55px;
    width: 135px;
  }
}

/* ASUS ZenBook Fold */
@media (min-width: 853px) and (max-width: 853px) and (min-height: 1280px) {
  .title-img {
    width: 27%;
  }

  .social-icons {
    display: none;
  }

  .social {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    margin-top: 20px;
    width: 100%;
    padding: 0;
    max-width: 853px;
  }

  .social-row {
    display: flex;
    flex-direction: row;
    gap: 16px;
    justify-content: space-between;
    width: 100%;
    max-width: 770px;
  }

  .social-btn-link {
    flex: 1;
    max-width: 375px;
  }

  .social-btn-link img {
    width: 100%;
    height: auto;
    display: block;
  }

  .download-btn-mobile {
    bottom: 2.5rem;
    left: 10%;
  }

  .download-btn-mobile .button-download-ios,
  .download-btn-mobile .button-download-android {
    height: 80px;
    width: 210px;
  }
}

/* Surface Pro 7 */
@media (min-width: 912px) and (max-width: 912px) and (min-height: 1368px) {
  .title-img {
    width: 25%;
  }

  .social-icons {
    display: none;
  }

  .social {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    margin-top: 20px;
    width: 100%;
    padding: 0 32px;
    max-width: 912px;
  }

  .social-row {
    display: flex;
    flex-direction: row;
    gap: 20px;
    justify-content: space-between;
    width: 100%;
    max-width: 820px;
  }

  .social-btn-link {
    flex: 1;
    max-width: 400px;
  }

  .social-btn-link img {
    width: 100%;
    height: auto;
    display: block;
  }

  .download-btn-mobile {
    bottom: 2.5rem;
    left: 7%;
  }

  .download-btn-mobile .button-download-ios,
  .download-btn-mobile .button-download-android {
    height: 100px;
    width: 250px;
  }
}

/* iPad Pro 12.9" */
@media (min-width: 1024px) and (max-width: 1024px) and (min-height: 1366px) {
  .title-img {
    width: 50%;
  }

  .social-icons {
    display: none;
  }

  .social {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    margin-top: 20px;
    width: 100%;
    padding: 0;
    max-width: 1024px;
  }

  .social-row {
    display: flex;
    flex-direction: row;
    gap: 24px;
    justify-content: space-between;
    width: 100%;
    max-width: 900px;
  }

  .social-btn-link {
    flex: 1;
    max-width: 440px;
  }

  .social-btn-link img {
    width: 100%;
    height: auto;
    display: block;
  }

  .download-btn-mobile {
    bottom: 2.5rem;
    left: 3%;
  }

  .download-btn-mobile .button-download-ios,
  .download-btn-mobile .button-download-android {
    height: 100px;
    width: 310px;
  }
}

/* Surface Duo - 1 màn (folded) */
@media (min-width: 540px) and (max-width: 540px) and (min-height: 720px) {
  .download-btn-mobile {
    bottom: 1rem;
    left: 5%;
  }

  .download-btn-mobile .button-download-ios,
  .download-btn-mobile .button-download-android {
    height: 60px;
    width: 150px;
  }
}

/* Surface Duo - 2 màn mở ra (unfolded) */
@media (min-width: 1114px) and (max-width: 1114px) and (min-height: 705px) {

}