:root {
  --bg: #08090a;
  --bg-soft: #0e1110;
  --ink: #f3f5f4;
  --ink-dim: #9aa39f;
  --ink-faint: #5b625f;
  --accent: #3ee8b8;
  --accent-dim: #2a5f52;
  --line: #1c211f;
  --radius: 14px;
  --serif: Georgia, "Times New Roman", serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --sans: "Space Grotesk", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  min-height: 100%;
}

body {
  position: relative;
  overflow-x: hidden;
}

/* subtle film grain */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 2;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.glow {
  position: fixed;
  top: 50%;
  left: 50%;
  width: 900px;
  height: 900px;
  transform: translate(-50%, -55%);
  background: radial-gradient(circle, rgba(62, 232, 184, 0.10) 0%, rgba(62, 232, 184, 0) 62%);
  pointer-events: none;
  z-index: 0;
}

.page {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  max-width: 780px;
  margin: 0 auto;
  padding: 40px 24px 32px;
}

/* --- header --- */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.wordmark {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--ink-dim);
}

.badge {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent-dim);
  background: rgba(62, 232, 184, 0.06);
  padding: 6px 12px;
  border-radius: 999px;
  white-space: nowrap;
}

/* --- hero --- */

.hero {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 64px 0 40px;
  position: relative;
}

.kanji {
  position: absolute;
  top: -18px;
  font-family: var(--serif);
  font-size: 220px;
  line-height: 1;
  color: var(--ink);
  opacity: 0.04;
  user-select: none;
  z-index: -1;
}

.tagline {
  font-size: clamp(2.4rem, 6vw, 4rem);
  line-height: 1.05;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
}

.description {
  font-size: clamp(1rem, 2vw, 1.15rem);
  line-height: 1.6;
  color: var(--ink-dim);
  max-width: 460px;
  margin: 0 0 48px;
}

/* --- capture --- */

.capture {
  width: 100%;
  max-width: 440px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.capture-label {
  font-size: 0.95rem;
  color: var(--ink);
  margin: 0 0 16px;
}

.capture-label .plus {
  color: var(--accent);
}

.capture-form {
  width: 100%;
  display: flex;
  gap: 10px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  padding: 6px;
  border-radius: var(--radius);
}

.email-input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: none;
  outline: none;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 0.95rem;
  padding: 12px 14px;
}

.email-input::placeholder {
  color: var(--ink-faint);
}

.capture-btn {
  flex-shrink: 0;
  background: var(--accent);
  color: #062019;
  border: none;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0 20px;
  border-radius: 9px;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease;
  white-space: nowrap;
}

.capture-btn:hover { background: #59efc4; }
.capture-btn:active { transform: scale(0.97); }
.capture-btn:disabled { opacity: 0.6; cursor: default; transform: none; }

.capture-note {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-faint);
  margin: 14px 0 0;
  transition: color 0.2s ease;
}

.capture-note.success {
  color: var(--accent);
}

/* --- footer --- */

.footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.social {
  display: flex;
  gap: 28px;
}

.social-link {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink-dim);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.15s ease;
}

.social-link:hover {
  color: var(--accent);
}

.copyright {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-faint);
  margin: 0;
}

/* --- responsive --- */

@media (max-width: 480px) {
  .capture-form {
    flex-direction: column;
  }
  .capture-btn {
    padding: 12px;
  }
  .kanji {
    font-size: 160px;
  }
}