:root {
  --bg: #010409;
  --text: #f7fbff;
  --muted: #b4bbc5;
  --soft: #7d8490;
  --line: rgba(114, 140, 168, 0.38);
  --cyan: #00b8ff;
  --cyan-strong: #139cff;
  --panel: rgba(3, 9, 17, 0.72);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 72% 12%, rgba(0, 132, 255, 0.26), transparent 32rem),
    radial-gradient(circle at 16% 28%, rgba(0, 184, 255, 0.12), transparent 22rem),
    linear-gradient(180deg, #01050a 0%, #010207 62%, #000 100%);
  color: var(--text);
  font-family: Inter, Arial, sans-serif;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 90px 90px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.75), transparent 78%);
  content: "";
}

.page-shell,
.site-footer {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
}

.hero {
  position: relative;
  min-height: 800px;
  padding-top: 62px;
  overflow: hidden;
}

.hero::before {
  position: absolute;
  inset: 0 -60px 0 auto;
  z-index: -1;
  width: min(820px, 74vw);
  background:
    linear-gradient(90deg, rgba(1, 4, 9, 0.94) 0%, rgba(1, 4, 9, 0.56) 28%, rgba(1, 4, 9, 0.12) 55%),
    linear-gradient(180deg, transparent 0%, rgba(1, 4, 9, 0.02) 58%, #010207 94%),
    url("assets/hero-ai-companion.png") center right / cover no-repeat;
  filter: saturate(1.08) contrast(1.05);
  content: "";
}

.hero::after {
  position: absolute;
  top: 86px;
  left: -18px;
  width: 180px;
  aspect-ratio: 1;
  border: 1px solid rgba(0, 184, 255, 0.18);
  border-right-color: transparent;
  border-bottom-color: transparent;
  border-radius: 50%;
  box-shadow: inset 28px 18px 40px rgba(0, 184, 255, 0.1), 0 0 36px rgba(0, 184, 255, 0.2);
  mask-image: radial-gradient(circle at 65% 66%, transparent 45%, #000 46%);
  content: "";
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 20px;
  min-height: 96px;
  letter-spacing: 0.34em;
}

.brand-mark {
  width: 84px;
  aspect-ratio: 1;
  border-top: 2px solid var(--cyan);
  border-left: 2px solid var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 24px rgba(0, 184, 255, 0.55);
  transform: rotate(-24deg);
}

.brand-text {
  display: grid;
  gap: 4px;
}

.brand strong {
  font-size: clamp(1.25rem, 2.6vw, 2rem);
  font-weight: 700;
  line-height: 1;
}

.brand span span {
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 700;
}

.hero-copy {
  width: min(690px, 100%);
  margin-top: 120px;
}

.eyebrow,
.panel-label {
  margin: 0 0 28px;
  color: #f4f8ff;
  font-size: 0.96rem;
  font-weight: 500;
  letter-spacing: 0.52em;
}

.eyebrow span,
.panel-label,
.site-footer span {
  color: var(--cyan);
}

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

h1 {
  max-width: 760px;
  margin-bottom: 30px;
  font-size: clamp(3.85rem, 6.9vw, 5.45rem);
  font-weight: 900;
  line-height: 0.97;
  letter-spacing: 0;
}

h1 .hero-line {
  color: var(--text);
  white-space: nowrap;
}

h1 span,
.feature h2 span,
.notify-panel h2 span {
  display: block;
  color: var(--cyan-strong);
}

.intro {
  max-width: 440px;
  margin-bottom: 38px;
  color: #d5d9df;
  font-size: 1.08rem;
  font-weight: 300;
  line-height: 1.75;
}

.hero-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 26px;
  min-width: 260px;
  min-height: 66px;
  border: 1px solid var(--cyan);
  border-radius: 14px;
  color: #fff;
  font-size: 0.94rem;
  font-weight: 800;
  letter-spacing: 0.25em;
  text-decoration: none;
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.hero-button:hover,
.hero-button:focus-visible {
  border-color: #6bdaff;
  box-shadow: 0 0 28px rgba(0, 184, 255, 0.22);
  transform: translateY(-2px);
}

.hero-button svg,
.email-field svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.hero-button svg {
  color: var(--cyan);
}

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-top: 10px;
  padding: 0 34px 96px;
}

.feature {
  min-height: 230px;
  padding: 0 58px;
  border-left: 1px solid var(--line);
}

.feature:first-child {
  border-left: 0;
  padding-left: 0;
}

.feature-icon {
  width: 56px;
  height: 56px;
  margin-bottom: 24px;
  fill: none;
  stroke: var(--cyan);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.feature h2 {
  margin-bottom: 18px;
  font-size: 1.38rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: 0.08em;
}

.feature p {
  max-width: 250px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.96rem;
  font-weight: 300;
  line-height: 1.75;
}

.notify-panel {
  display: grid;
  grid-template-columns: 0.78fr 1.22fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 44px;
  padding: 42px;
  border: 1px solid rgba(52, 139, 216, 0.64);
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(10, 17, 30, 0.9), rgba(2, 5, 10, 0.7));
  box-shadow: inset 0 0 38px rgba(0, 184, 255, 0.035);
}

.panel-label {
  margin-bottom: 16px;
  font-size: 0.78rem;
}

.notify-panel h2 {
  margin-bottom: 0;
  font-size: clamp(2rem, 3.1vw, 2.55rem);
  font-weight: 300;
  line-height: 1.32;
}

.notify-form {
  display: grid;
  grid-template-columns: 1fr 176px;
  gap: 0;
  align-items: stretch;
}

.email-field {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 64px;
  padding: 0 24px;
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-right: 0;
  border-radius: 14px 0 0 14px;
  color: #d7dce4;
  background: rgba(0, 0, 0, 0.28);
}

input {
  width: 100%;
  border: 0;
  outline: 0;
  background: transparent;
  color: #fff;
  font: inherit;
}

input::placeholder {
  color: #c1c6ce;
}

button {
  border: 0;
  border-radius: 0 14px 14px 0;
  background: linear-gradient(135deg, #20c4ff, #188cff);
  color: #fff;
  font: inherit;
  font-weight: 800;
  letter-spacing: 0.11em;
  cursor: pointer;
}

button:hover,
button:focus-visible {
  background: linear-gradient(135deg, #5bd5ff, #139cff);
}

.notify-form p {
  grid-column: 1 / -1;
  margin: 20px 0 0;
  color: var(--soft);
  font-size: 0.98rem;
  letter-spacing: 0.16em;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 58px;
  color: #b9bec7;
  font-size: 0.9rem;
  font-weight: 300;
}

.site-footer p {
  margin-bottom: 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 900px) {
  .page-shell,
  .site-footer {
    width: min(100% - 32px, 680px);
  }

  .hero {
    min-height: 760px;
    padding-top: 42px;
  }

  .hero::before {
    inset: 70px -180px 0 auto;
    width: 860px;
    opacity: 0.6;
  }

  .brand {
    min-height: 76px;
    margin-left: 0;
  }

  .brand-mark {
    width: 58px;
  }

  .hero-copy {
    margin-top: 145px;
  }

  h1 {
    font-size: clamp(3rem, 13vw, 5rem);
  }

  .eyebrow {
    max-width: 420px;
    line-height: 1.8;
  }

  .features,
  .notify-panel {
    grid-template-columns: 1fr;
  }

  .features {
    gap: 38px;
    padding: 12px 0 72px;
  }

  .feature,
  .feature:first-child {
    min-height: auto;
    padding: 0 0 0 26px;
    border-left: 1px solid var(--line);
  }

  .notify-panel {
    gap: 30px;
    padding: 30px;
  }

  .site-footer {
    flex-direction: column;
    padding-bottom: 36px;
  }
}

@media (max-width: 560px) {
  .page-shell,
  .site-footer {
    width: min(100% - 24px, 420px);
  }

  .hero {
    min-height: 730px;
  }

  .hero::before {
    inset: 90px -260px 0 auto;
    width: 780px;
  }

  .hero::after {
    width: 116px;
  }

  .brand {
    gap: 14px;
    letter-spacing: 0.18em;
  }

  .brand strong {
    font-size: 1.08rem;
  }

  .brand span span {
    font-size: 0.63rem;
  }

  .hero-copy {
    margin-top: 118px;
  }

  .eyebrow,
  .panel-label {
    letter-spacing: 0.28em;
  }

  h1 {
    font-size: clamp(2.55rem, 14.8vw, 3.85rem);
  }

  .intro {
    font-size: 1rem;
  }

  .hero-button {
    width: 100%;
    min-width: 0;
  }

  .notify-form {
    grid-template-columns: 1fr;
  }

  .email-field {
    border-right: 1px solid rgba(255, 255, 255, 0.45);
    border-radius: 14px 14px 0 0;
  }

  button {
    min-height: 60px;
    border-radius: 0 0 14px 14px;
  }

  .notify-form p {
    letter-spacing: 0.07em;
    line-height: 1.6;
  }
}