:root {
  --bg: #ffffff;
  --surface: #f6f8fa;
  --ink: #1a1a1a;
  --muted: #656d76;
  --border: #d0d7de;
  --accent: #0f5c63;
  --accent-ink: #ffffff;
  --warn-bg: #fff8e6;
  --warn-border: #e6c875;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --surface: #171a20;
    --ink: #e8eaed;
    --muted: #9aa3ad;
    --border: #2f3640;
    --accent: #4fb3ba;
    --accent-ink: #0f1115;
    --warn-bg: #2a2416;
    --warn-border: #6b5a2a;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

a { color: var(--accent); }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 720px; }

.site-header { border-bottom: 1px solid var(--border); }
.header-row { display: flex; align-items: center; justify-content: space-between; padding-top: 16px; padding-bottom: 16px; }
.wordmark { display: flex; flex-direction: column; text-decoration: none; color: var(--ink); line-height: 1.15; }
.wordmark-name { font-size: 22px; font-weight: 700; letter-spacing: -0.01em; }
.wordmark-domain { font-size: 13px; color: var(--muted); }
.badge { font-size: 13px; font-weight: 600; color: var(--accent); border: 1px solid var(--accent); border-radius: 999px; padding: 2px 12px; }

section { padding: 56px 0; }
.band { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

h1 { font-size: clamp(32px, 5vw, 48px); line-height: 1.1; letter-spacing: -0.02em; margin: 0 0 16px; }
h2 { font-size: 26px; line-height: 1.2; margin: 0 0 16px; }
h3 { font-size: 18px; margin: 0 0 8px; }
.lead { font-size: 20px; color: var(--ink); margin: 0 0 16px; }
.muted { color: var(--muted); margin-top: 0; }
.info-tag { font-weight: 600; color: var(--accent); }

.hero-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; align-items: start; }
@media (max-width: 820px) { .hero-grid { grid-template-columns: 1fr; gap: 32px; } }

.card { background: var(--bg); border: 1px solid var(--border); border-radius: 12px; padding: 24px; }
.signup h2 { font-size: 22px; margin-bottom: 4px; }
.signup label { display: block; font-size: 15px; font-weight: 600; margin: 16px 0 6px; }
.signup input[type="email"], .signup select {
  width: 100%; font: inherit; font-size: 16px; padding: 10px 12px;
  color: var(--ink); background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
}
.signup input:focus, .signup select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.signup .check { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; }
.signup .check input { margin-top: 5px; }
.warn { font-size: 14px; background: var(--warn-bg); border: 1px solid var(--warn-border); border-radius: 8px; padding: 10px 12px; margin: 16px 0; }
button {
  width: 100%; font: inherit; font-weight: 600; font-size: 17px; padding: 12px;
  color: var(--accent-ink); background: var(--accent); border: 0; border-radius: 8px; cursor: pointer;
}
button:hover { filter: brightness(1.08); }
.hidden-field { position: absolute; left: -10000px; }

.pillars { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
@media (max-width: 900px) { .pillars { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .pillars { grid-template-columns: 1fr; } }
.pillar { background: var(--bg); border: 1px solid var(--border); border-radius: 12px; padding: 20px; }
.pillar p { margin: 0; color: var(--muted); font-size: 16px; }

.steps { padding-left: 24px; }
.steps li { margin-bottom: 12px; }

.never { padding-left: 24px; font-weight: 600; }

.notice { border: 1px solid var(--border); border-left: 4px solid var(--accent); border-radius: 8px; padding: 20px 24px; }
.notice h2 { font-size: 18px; margin-bottom: 8px; }
.notice p { margin: 0; }

.site-footer { border-top: 1px solid var(--border); padding: 24px 0; font-size: 14px; color: var(--muted); }
.site-footer p { margin: 4px 0; }