:root {
  --bg: #07090d;
  --paper: rgba(13, 17, 24, 0.82);
  --paper-strong: rgba(17, 23, 31, 0.94);
  --ink: #ecf3ff;
  --muted: #91a0b7;
  --line: rgba(154, 177, 214, 0.16);
  --accent: #7ae0ff;
  --accent-strong: #4cc7ff;
  --accent-soft: rgba(76, 199, 255, 0.12);
  --shadow: 0 30px 80px rgba(0, 0, 0, 0.42);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "JetBrains Mono", monospace;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(76, 199, 255, 0.2), transparent 24%),
    radial-gradient(circle at 85% 12%, rgba(126, 104, 255, 0.14), transparent 28%),
    linear-gradient(180deg, #09111a 0%, #05070b 100%);
}

.page-shell {
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
  padding: 48px 0 72px;
}

.hero {
  position: relative;
  padding: 56px;
  border: 1px solid var(--line);
  border-radius: 30px;
  background:
    linear-gradient(135deg, rgba(14, 20, 29, 0.98), rgba(9, 14, 21, 0.88)),
    var(--paper-strong);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -60px -120px auto;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(76, 199, 255, 0.22), transparent 65%);
}

.eyebrow,
.section-kicker {
  margin: 0 0 12px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.8rem;
  font-weight: 600;
}

.hero h1,
.panel h2 {
  font-family: "JetBrains Mono", monospace;
  letter-spacing: -0.05em;
}

.hero h1 {
  max-width: 12ch;
  margin: 0;
  font-size: clamp(2.8rem, 7vw, 5.4rem);
  line-height: 0.94;
}

.hero-copy {
  max-width: 44rem;
  margin: 18px 0 0;
  font-size: 1.08rem;
  color: var(--muted);
}

.hero-note {
  max-width: 42rem;
  margin-top: 28px;
  padding: 16px 18px;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
}

main {
  margin-top: 26px;
}

.panel-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.panel-grid-bottom {
  align-items: start;
}

.panel,
.panel-wide {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--paper);
  backdrop-filter: blur(10px);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.24);
}

.panel h2 {
  margin: 0;
  font-size: 1.8rem;
  line-height: 1.02;
}

.panel-heading {
  margin-bottom: 18px;
}

.callback-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

label,
.field-label {
  display: block;
  margin-top: 14px;
  font-size: 0.94rem;
  font-weight: 600;
}

label span {
  display: block;
  margin-bottom: 8px;
}

input,
textarea,
button {
  font: inherit;
}

input,
textarea {
  width: 100%;
  border: 1px solid rgba(154, 177, 214, 0.18);
  border-radius: 14px;
  background: rgba(4, 9, 14, 0.82);
  color: var(--ink);
}

input {
  min-height: 48px;
  padding: 0 14px;
}

textarea {
  min-height: 92px;
  padding: 12px 14px;
  resize: vertical;
}

.mono {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.88rem;
}

button {
  margin-top: 18px;
  min-height: 50px;
  padding: 0 18px;
  border: 0;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent-strong), var(--accent));
  color: #031019;
  font-weight: 600;
  cursor: pointer;
  transition:
    transform 180ms ease,
    background 180ms ease,
    box-shadow 180ms ease;
}

button:hover {
  transform: translateY(-1px);
  background: linear-gradient(135deg, #91ecff, #5fd2ff);
  box-shadow: 0 12px 30px rgba(76, 199, 255, 0.22);
}

.helper {
  margin: 14px 0 0;
  color: var(--muted);
  line-height: 1.5;
}

.verify-block {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.verify-block button {
  width: 100%;
}

.steps {
  margin: 0;
  padding-left: 20px;
  line-height: 1.65;
}

.text-link {
  display: inline-block;
  margin-top: 16px;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.text-link:hover {
  text-decoration: underline;
}

code {
  padding: 0.12rem 0.36rem;
  border: 1px solid rgba(154, 177, 214, 0.14);
  border-radius: 0.45rem;
  background: rgba(255, 255, 255, 0.04);
}

@media (max-width: 860px) {
  .page-shell {
    width: min(100% - 20px, 1160px);
    padding-top: 20px;
  }

  .hero {
    padding: 28px;
  }

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

  .panel,
  .panel-wide {
    padding: 22px;
  }
}