:root {
  --bg: #0a0e1a;
  --text: #e8e4d8;
  --accent: #d4923a;
  --accent-light: #e9b56a;
  --circuit: #1a3458;
  --muted: #7a7470;
  --divider: #1f1c18;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--bg);
  color: var(--text);
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  font-weight: 400;
  font-size: 1.0625rem;
  line-height: 1.65;
}

main {
  width: 100%;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 6rem 1.5rem 4rem;
  text-align: center;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.1;
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 47px,
      var(--circuit) 47px,
      var(--circuit) 48px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 47px,
      var(--circuit) 47px,
      var(--circuit) 48px
    );
  mask-image: radial-gradient(ellipse 75% 65% at 50% 42%, #000 15%, transparent 72%);
  -webkit-mask-image: radial-gradient(ellipse 75% 65% at 50% 42%, #000 15%, transparent 72%);
}

.hero > * {
  position: relative;
  z-index: 1;
}

.sol-logo-wrap {
  position: relative;
  display: inline-block;
  margin: 0 auto 2rem;
}

.sol-logo-wrap::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 0;
  width: 440px;
  height: 440px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(212, 146, 58, 0.18) 0%, transparent 60%);
  pointer-events: none;
}

.sol-logo {
  position: relative;
  z-index: 1;
  display: block;
  width: 220px;
  height: auto;
  margin: 0;
  border-radius: 4px;
  box-shadow: 0 8px 32px rgba(212, 146, 58, 0.15);
}

main section {
  padding: 5rem 1.5rem;
  text-align: center;
  border-top: 1px solid rgba(232, 228, 216, 0.06);
}

h1,
h2 {
  font-family: Fraunces, Georgia, serif;
  font-weight: 600;
  color: var(--text);
}

h1 {
  font-size: clamp(3rem, 7vw, 5rem);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
}

h2 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 1.25rem;
}

.hero .subtitle {
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  font-size: clamp(1.15rem, 2.5vw, 1.4rem);
  font-weight: 500;
  color: var(--accent-light);
  letter-spacing: 0.02em;
  margin: 0 0 1.5rem;
}

.hero > p:not(.subtitle) {
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  color: var(--text);
  opacity: 0.9;
  max-width: 36ch;
  margin: 0 auto;
}

main section p {
  font-size: clamp(1rem, 1.5vw, 1.1rem);
  line-height: 1.6;
  max-width: 56ch;
  margin: 0 auto 1rem;
  color: var(--text);
}

main section p:last-child {
  margin-bottom: 0;
}

.muted {
  font-size: 0.9375rem;
  color: var(--muted);
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.btn {
  display: inline-block;
  padding: 1rem 1.5rem;
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  font-size: 1.0625rem;
  font-weight: 500;
  color: var(--bg);
  background-color: var(--accent);
  border: none;
  border-radius: 2px;
  text-decoration: none;
  cursor: pointer;
  box-shadow: none;
  transition: background-color 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover,
.btn:focus-visible {
  background-color: var(--accent-light);
  text-decoration: none;
}

.btn-primary {
  padding: 1rem 2.5rem;
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  margin: 0.5rem auto 1.5rem;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  box-shadow: 0 0 24px rgba(212, 146, 58, 0.4);
}

.btn:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 2px;
}

.signup-form {
  max-width: 420px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

input[type="email"] {
  padding: 0.9rem 1rem;
  font-size: 1rem;
  font-family: inherit;
  background: rgba(232, 228, 216, 0.04);
  border: 1px solid var(--divider);
  border-radius: 4px;
  color: var(--text);
  width: 100%;
  box-sizing: border-box;
}

input[type="email"]:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(232, 228, 216, 0.06);
}

input[type="email"]::placeholder {
  color: var(--muted);
  opacity: 0.7;
}

button.btn-primary {
  display: inline-block;
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  color: var(--bg);
  background-color: var(--accent);
  border: none;
  border-radius: 2px;
  cursor: pointer;
  text-decoration: none;
  box-shadow: none;
  transition: background-color 0.2s ease, box-shadow 0.2s ease;
}

button.btn-primary:hover,
button.btn-primary:focus-visible {
  background-color: var(--accent-light);
  text-decoration: none;
}

.signup-submit {
  width: 100%;
  margin: 0;
}

footer {
  width: 100%;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  padding: 3rem 1.5rem;
  text-align: center;
  font-size: 0.9rem;
  color: var(--muted);
}

footer p {
  margin: 0 0 0.75rem;
  color: var(--muted);
  font-size: 0.9rem;
}

footer p:last-child {
  margin-bottom: 0;
}

footer a {
  color: var(--accent);
  margin: 0 0.35rem;
}

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

@media (min-width: 768px) {
  .sol-logo-wrap::before {
    width: 640px;
    height: 640px;
  }

  .sol-logo {
    width: 320px;
  }
}