:root {
  --bg: #05060d;
  --panel: #0d1020;
  --panel-2: #14182a;
  --text: #f5f7ff;
  --muted: #aeb7d4;
  --line: rgba(255, 255, 255, 0.13);
  --cyan: #2bd9ff;
  --violet: #a855f7;
  --rose: #ff4f9a;
  --lime: #84f7a6;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 15% 12%, rgba(43, 217, 255, 0.16), transparent 28rem),
    radial-gradient(circle at 82% 18%, rgba(168, 85, 247, 0.2), transparent 28rem),
    linear-gradient(180deg, #03040a 0%, #070812 42%, #05060d 100%);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  min-height: 76px;
  padding: 14px clamp(18px, 4vw, 64px);
  background: rgba(5, 6, 13, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 1.03rem;
  font-weight: 800;
  letter-spacing: 0;
}

.brand img {
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  object-fit: contain;
  background: #02030a;
}

.site-nav {
  display: flex;
  justify-content: center;
  gap: 28px;
  color: var(--muted);
  font-size: 0.94rem;
  font-weight: 600;
}

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

.header-action,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 800;
  line-height: 1;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.header-action {
  background: rgba(255, 255, 255, 0.08);
}

.button:hover,
.header-action:hover {
  transform: translateY(-2px);
}

.button.primary {
  color: #02030a;
  background: linear-gradient(135deg, var(--cyan), var(--violet) 55%, var(--rose));
  border-color: transparent;
  box-shadow: 0 16px 40px rgba(43, 217, 255, 0.18);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.07);
}

.nav-toggle {
  display: none;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.82fr);
  align-items: center;
  gap: clamp(28px, 5vw, 72px);
  min-height: 94vh;
  padding: 120px clamp(18px, 6vw, 86px) 64px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(5, 6, 13, 0.15), rgba(5, 6, 13, 0.7)),
    radial-gradient(circle at 68% 48%, rgba(43, 217, 255, 0.18), transparent 18rem),
    radial-gradient(circle at 78% 38%, rgba(255, 79, 154, 0.14), transparent 16rem);
  pointer-events: none;
}

.hero-content,
.hero-media {
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 760px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 18px;
  max-width: 100%;
  overflow-wrap: normal;
  font-size: clamp(4rem, 7.2vw, 7.8rem);
  line-height: 0.86;
  font-weight: 900;
  letter-spacing: 0;
  text-shadow: 0 0 34px rgba(43, 217, 255, 0.28);
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(2rem, 4vw, 4.1rem);
  line-height: 1;
  font-weight: 900;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.1rem;
}

.hero-copy,
.preview-copy p,
.contact p,
.feature-card p,
.faq p,
.price-note {
  color: var(--muted);
  line-height: 1.7;
}

.hero-copy {
  max-width: 660px;
  margin-bottom: 28px;
  font-size: clamp(1.02rem, 1.5vw, 1.24rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 30px;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-stats span {
  padding: 10px 13px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.hero-stats strong {
  color: var(--text);
}

.hero-media {
  justify-self: center;
}

.hero-media img {
  width: min(440px, 76vw);
  aspect-ratio: 1;
  border-radius: 16px;
  object-fit: contain;
  background: #02030a;
  box-shadow: 0 0 80px rgba(43, 217, 255, 0.18), 0 0 110px rgba(168, 85, 247, 0.22);
}

.notice {
  padding: 0 clamp(18px, 6vw, 86px) 72px;
}

.notice-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 18px 20px;
  color: #dce8ff;
  background: rgba(132, 247, 166, 0.08);
  border: 1px solid rgba(132, 247, 166, 0.28);
  border-radius: 8px;
  line-height: 1.6;
}

.section {
  padding: 86px clamp(18px, 6vw, 86px);
}

.section-heading {
  max-width: 820px;
  margin-bottom: 36px;
}

.device-grid,
.feature-grid,
.pricing-grid {
  display: grid;
  gap: 14px;
}

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

.device-item {
  display: grid;
  min-height: 152px;
  align-content: center;
  justify-items: center;
  gap: 10px;
  place-items: center;
  color: #e9efff;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.035));
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 800;
  text-align: center;
}

.device-item strong {
  font-size: 1rem;
}

.device-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 112px;
  height: 54px;
}

.device-logo img {
  width: 100%;
  max-width: 112px;
  max-height: 44px;
  object-fit: contain;
  filter: drop-shadow(0 10px 20px rgba(43, 217, 255, 0.16));
}

.word-logo {
  color: #f5f7ff;
  font-size: 1.32rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  text-shadow: 0 0 22px rgba(43, 217, 255, 0.28);
}

.samsung-logo {
  font-size: 1.08rem;
  letter-spacing: 0.14em;
}

.fire-logo {
  color: #ff8a3d;
  font-size: 1.38rem;
  letter-spacing: 0;
}

.combo-logo {
  gap: 10px;
  color: #f5f7ff;
  font-weight: 900;
}

.combo-logo img {
  width: 38px;
}

.combo-logo span {
  font-size: 1.24rem;
}

.dual-logo {
  gap: 16px;
}

.dual-logo img {
  width: 36px;
}

.device-item small {
  padding: 6px 10px;
  color: var(--lime);
  background: rgba(132, 247, 166, 0.1);
  border: 1px solid rgba(132, 247, 166, 0.28);
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 900;
  text-transform: uppercase;
}

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

.feature-card,
.price-card {
  min-height: 210px;
  padding: 24px;
  background: rgba(13, 16, 32, 0.78);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.feature-icon {
  display: inline-grid;
  width: 42px;
  height: 42px;
  margin-bottom: 28px;
  place-items: center;
  color: #02030a;
  background: var(--cyan);
  border-radius: 8px;
  font-weight: 900;
}

.app-preview {
  display: grid;
  grid-template-columns: 0.72fr 1fr;
  align-items: center;
  gap: clamp(28px, 5vw, 74px);
  padding: 90px clamp(18px, 6vw, 86px);
  background:
    linear-gradient(120deg, rgba(20, 24, 42, 0.92), rgba(7, 8, 18, 0.94)),
    radial-gradient(circle at 70% 40%, rgba(43, 217, 255, 0.2), transparent 20rem);
}

.screen {
  min-height: 420px;
  padding: 18px;
  background: #070913;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.screen-topbar,
.screen-layout {
  display: grid;
}

.screen-topbar {
  grid-template-columns: 1fr auto;
  padding: 12px 14px;
  color: #eaf5ff;
  background: rgba(255, 255, 255, 0.07);
  border-radius: 8px;
  font-weight: 800;
}

.screen-layout {
  grid-template-columns: 170px 1fr;
  gap: 16px;
  margin-top: 16px;
}

.screen aside,
.screen-content {
  min-height: 330px;
  padding: 14px;
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
}

.screen aside {
  display: grid;
  align-content: start;
  gap: 10px;
}

.screen aside span,
.channel-list span {
  padding: 12px;
  color: var(--muted);
  border-radius: 8px;
}

.screen aside .active,
.channel-list .selected {
  color: #02030a;
  background: linear-gradient(135deg, var(--cyan), var(--lime));
  font-weight: 900;
}

.now-playing {
  display: grid;
  min-height: 168px;
  align-content: end;
  padding: 20px;
  background: linear-gradient(135deg, rgba(43, 217, 255, 0.26), rgba(168, 85, 247, 0.24));
  border-radius: 8px;
}

.now-playing span {
  color: #c9d3f4;
}

.now-playing strong {
  font-size: clamp(1.4rem, 4vw, 2.6rem);
}

.channel-list {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}

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

.price-card {
  display: grid;
  align-content: start;
  gap: 14px;
}

.price-label {
  margin-bottom: 0;
  color: var(--cyan);
  font-weight: 900;
  text-transform: uppercase;
}

.price-card h3 {
  margin-bottom: 0;
  font-size: clamp(2.2rem, 4vw, 3.8rem);
}

.featured-price {
  border-color: rgba(43, 217, 255, 0.48);
  background: linear-gradient(180deg, rgba(43, 217, 255, 0.16), rgba(168, 85, 247, 0.12));
}

.faq-list {
  display: grid;
  gap: 12px;
  max-width: 920px;
}

details {
  padding: 18px 20px;
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid var(--line);
  border-radius: 8px;
}

summary {
  cursor: pointer;
  font-weight: 900;
}

details p {
  margin: 14px 0 0;
}

.contact {
  display: grid;
  grid-template-columns: 0.9fr 1fr;
  gap: clamp(24px, 5vw, 70px);
  padding: 90px clamp(18px, 6vw, 86px);
  background: linear-gradient(135deg, rgba(43, 217, 255, 0.13), rgba(255, 79, 154, 0.1));
}

.contact-form {
  display: grid;
  gap: 14px;
  padding: 22px;
  background: rgba(5, 6, 13, 0.62);
  border: 1px solid var(--line);
  border-radius: 8px;
}

label {
  display: grid;
  gap: 8px;
  color: #dbe4ff;
  font-size: 0.92rem;
  font-weight: 800;
}

input {
  width: 100%;
  min-height: 48px;
  padding: 0 14px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
}

input:focus {
  outline: 2px solid rgba(43, 217, 255, 0.6);
  outline-offset: 2px;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 14px;
  padding: 26px clamp(18px, 6vw, 86px);
  color: var(--muted);
  background: #03040a;
  border-top: 1px solid var(--line);
}

@media (max-width: 920px) {
  .site-header {
    grid-template-columns: auto auto;
  }

  .nav-toggle {
    display: inline-grid;
    justify-self: end;
    width: 44px;
    height: 44px;
    place-items: center;
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid var(--line);
    border-radius: 8px;
  }

  .nav-toggle span {
    width: 18px;
    height: 2px;
    background: var(--text);
  }

  .site-nav,
  .header-action {
    display: none;
  }

  .site-nav.is-open {
    position: absolute;
    top: 76px;
    left: 18px;
    right: 18px;
    display: grid;
    justify-content: stretch;
    gap: 0;
    padding: 10px;
    background: rgba(5, 6, 13, 0.96);
    border: 1px solid var(--line);
    border-radius: 8px;
  }

  .site-nav.is-open a {
    padding: 14px;
  }

  .hero,
  .app-preview,
  .contact {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 118px;
  }

  .hero-media {
    order: -1;
  }

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

@media (max-width: 620px) {
  .brand span {
    font-size: 0.95rem;
  }

  h1 {
    font-size: clamp(3.3rem, 20vw, 5rem);
  }

  .hero-actions,
  .button {
    width: 100%;
  }

  .hero-stats {
    display: grid;
  }

  .device-grid,
  .feature-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .screen {
    min-height: auto;
    padding: 12px;
  }

  .screen-layout {
    grid-template-columns: 1fr;
  }

  .screen aside,
  .screen-content {
    min-height: auto;
  }
}