:root {
  --bg: #ffffff;
  --ink: #111111;
  --muted: #6b6b6b;
  --hairline: #ececec;
  --input-bg: #ffffff;
  --focus-ring: rgba(0,0,0,0.05);
  --ok: #1a7f37;
  --err: #b42318;
  --max: 640px;
}

/* OS-level dark mode — only when the user hasn't picked manually */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0b0b;
    --ink: #f0f0f0;
    --muted: #8a8a8a;
    --hairline: #1d1d1d;
    --input-bg: #141414;
    --focus-ring: rgba(255,255,255,0.07);
    --ok: #4ac26b;
    --err: #ff6b5c;
  }
}

/* Manual override via the toggle */
:root[data-theme="dark"] {
  --bg: #0b0b0b;
  --ink: #f0f0f0;
  --muted: #8a8a8a;
  --hairline: #1d1d1d;
  --input-bg: #141414;
  --focus-ring: rgba(255,255,255,0.07);
  --ok: #4ac26b;
  --err: #ff6b5c;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  font-feature-settings: 'ss01', 'cv11';
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.55;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 1px;
  transition: opacity 120ms ease;
}
a:hover { opacity: 0.6; }

.wrap {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px;
}

header {
  padding-top: clamp(40px, 8vh, 96px);
  padding-bottom: 8px;
  display: flex;
  align-items: center;
}

.mark {
  display: inline-flex;
  align-items: center;
  gap: 0px;
  font-weight: 300;
  font-size: clamp(20px, 7vw, 50px);
  letter-spacing: clamp(1.5px, 0.6vw, 4px);
  min-width: 0;
}
a.mark { border-bottom: 0; padding-bottom: 0; }

.mark .logo {
  width: clamp(40px, 14vw, 100px);
  color: var(--ink);
  flex-shrink: 0;
}

main {
  flex: 1;
  padding-top: clamp(48px, 10vh, 120px);
  padding-bottom: 80px;
}

h1 {
  font-size: clamp(28px, 4.2vw, 38px);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0 0 24px;
}
h1 .soft { color: var(--muted); font-weight: 400; }

p.lede {
  font-size: 17px;
  color: var(--muted);
  margin: 0 0 24px;
  max-width: 56ch;
}
p.lede:last-of-type { margin-bottom: 40px; }

section {
  padding: 32px 0;
  border-top: 1px solid var(--hairline);
}
section:first-of-type { border-top: none; padding-top: 0; }

.eyebrow {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 16px;
  font-weight: 500;
}

.product {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.product .name {
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.product .desc {
  color: var(--muted);
  font-size: 15px;
  margin-top: 4px;
}

.product .link {
  font-size: 14px;
  color: var(--muted);
  border-bottom-color: var(--hairline);
}

/* Form */
form {
  display: grid;
  gap: 14px;
  max-width: 480px;
}

label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
}

input[type="text"],
input[type="email"],
textarea {
  width: 100%;
  font: inherit;
  font-size: 15px;
  color: var(--ink);
  background: var(--input-bg);
  border: 1px solid var(--hairline);
  border-radius: 6px;
  padding: 10px 12px;
  transition: border-color 120ms ease, box-shadow 120ms ease;
}

input:focus, textarea:focus {
  outline: none;
  border-color: var(--muted);
  box-shadow: 0 0 0 3px var(--focus-ring);
}

textarea {
  min-height: 120px;
  resize: vertical;
  font-family: inherit;
}

button {
  justify-self: start;
  font: inherit;
  font-size: 15px;
  font-weight: 500;
  color: var(--bg);
  background: var(--ink);
  border: 1px solid var(--ink);
  border-radius: 6px;
  padding: 10px 18px;
  cursor: pointer;
  transition: opacity 120ms ease;
}
button:hover { opacity: 0.85; }
button:disabled { opacity: 0.5; cursor: default; }

/* Link styled as a primary button (e.g. the /thanks CTA) */
.btn {
  display: inline-flex;
  align-items: center;
  font-size: 15px;
  font-weight: 500;
  color: var(--bg);
  background: var(--ink);
  border: 1px solid var(--ink);
  border-radius: 6px;
  padding: 10px 18px;
  transition: opacity 120ms ease;
}
.btn:hover { opacity: 0.85; }

/* Honeypot — visually hidden, accessibility hidden, kept off-screen */
.hp {
  position: absolute !important;
  left: -10000px !important;
  top: auto !important;
  width: 1px !important;
  height: 1px !important;
  overflow: hidden !important;
}

.form-status {
  font-size: 14px;
  color: var(--muted);
  min-height: 1.4em;
}
.form-status.ok { color: var(--ok); }
.form-status.err { color: var(--err); }

footer {
  padding: 32px 0 40px;
  border-top: 1px solid var(--hairline);
  font-size: 13px;
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

footer a {
  color: var(--muted);
  border-bottom-color: var(--hairline);
}

.footer-links {
  display: inline-flex;
  align-items: center;
  gap: 18px;
}

/* Icon-only links: no underline, inherit the muted footer tone */
footer a.social {
  display: inline-flex;
  align-items: center;
  border-bottom: 0;
  padding-bottom: 0;
  color: var(--muted);
}

/* Drop the inline-SVG baseline gap so the icon centers with the text */
footer a.social svg {
  display: block;
}

footer .mark {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.01em;
  gap: 8px;
  color: var(--ink);
}

footer .mark .logo {
  width: 20px;
  height: 20px;
}

@media (max-width: 480px) {
  .product { flex-direction: column; align-items: flex-start; gap: 4px; }
}