:root {
  --bg: #000;
  --fg: #efefef;
  --accent: #00ff33;
  --muted: #999;
}

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

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: Verdana, Geneva, Arial, sans-serif;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

main {
  width: 100%;
  max-width: 640px;
  text-align: center;
}

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

.logo { margin: 0 auto; }

.tagline {
  margin: 2rem 0 2rem;
  font-size: 28px;
  font-weight: bold;
  color: var(--accent);
  letter-spacing: 0.01em;
  text-transform: none;
}

.subscribe {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.85rem;
}

.subscribe input[type="email"] {
  width: 100%;
  max-width: 420px;
  background: #fff;
  border: 2px inset #c0c0c0;
  color: #000;
  font-family: inherit;
  font-size: 18px;
  padding: 0.55rem 0.7rem;
  outline: none;
}

.subscribe input[type="email"]::placeholder { color: #888; }

.ok {
  margin-top: 1.25rem;
  font-size: 14px;
  color: var(--accent);
  letter-spacing: 0.04em;
}