:root {
  color-scheme: light;
  --bg: #ffffff;
  --fg: #111111;
  --muted: #6b6b6b;
  --line: #111111;
  --fill: #111111;
  --on-fill: #ffffff;
  --err: #b42318;
  --focus: 0 0 0 2px #ffffff, 0 0 0 4px #111111;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", "IBM Plex Mono", Menlo, Consolas, monospace;
  --page: 440px;
  --gutter: 20px;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #000000;
  --fg: #f5f5f5;
  --muted: #a3a3a3;
  --line: #f5f5f5;
  --fill: #f5f5f5;
  --on-fill: #000000;
  --err: #f97066;
  --focus: 0 0 0 2px #000000, 0 0 0 4px #f5f5f5;
}

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

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

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--fg);
  font: 400 16px/1.5 var(--font);
  -webkit-font-smoothing: antialiased;
}

button, input, textarea {
  font: inherit;
  color: inherit;
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: none;
  box-shadow: var(--focus);
}

.top {
  position: sticky;
  top: 0;
  z-index: 2;
  display: grid;
  grid-template-columns: 40px 1fr 40px;
  align-items: center;
  width: min(100%, var(--page));
  min-height: 64px;
  margin: 0 auto;
  padding: 12px var(--gutter);
  background: var(--bg);
}

.icon-btn {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--fg);
  cursor: pointer;
}

.icon-btn[hidden] { display: none; }

.icon-btn[data-back] { grid-column: 1; }
.icon-btn[data-theme-toggle] { grid-column: 3; justify-self: end; }

html[data-theme="light"] .theme-moon,
html[data-theme="dark"] .theme-sun { display: none; }

.shell {
  width: min(100%, var(--page));
  margin: 0 auto;
  padding: 40px var(--gutter) 72px;
}

.view[hidden] { display: none; }

.identity {
  margin: 0 0 32px;
  text-align: center;
}

h1 {
  margin: 0;
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.25;
  text-align: center;
}

.role {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 15px;
}

.links {
  display: grid;
  gap: 10px;
}

.card {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  color: var(--fg);
  text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.card:hover {
  background: var(--fill);
  color: var(--on-fill);
}

.card:hover .card-text { color: inherit; opacity: 0.72; }

.card-title {
  font-size: 16px;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.card-text {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.3;
  letter-spacing: 0.02em;
}

.contact {
  margin: 32px 0 0;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

.contact a {
  color: var(--fg);
  text-decoration: none;
}

.contact a:hover { color: var(--muted); }

.note {
  margin: 12px 0 28px;
  color: var(--muted);
  text-align: center;
  font-size: 14px;
  line-height: 1.5;
}

.form {
  display: grid;
  gap: 20px;
}

.form label {
  display: grid;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
}

.form input:not(.hp),
.form textarea {
  width: 100%;
  min-height: 48px;
  padding: 10px 0;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  resize: vertical;
}

.form textarea { min-height: 96px; }

.form input::placeholder,
.form textarea::placeholder {
  color: var(--muted);
  opacity: 0.65;
}

.form label[hidden] { display: none; }

.hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
  pointer-events: none;
}

.err {
  margin: 0;
  color: var(--err);
  font-size: 13px;
}

.err[hidden] { display: none; }

.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 52px;
  padding: 12px 18px;
  border: 1px solid var(--line);
  background: var(--fill);
  color: var(--on-fill);
  text-decoration: none;
  cursor: pointer;
  font-size: 15px;
  font-weight: 500;
}

.btn:hover { opacity: 0.88; }

.btn:disabled {
  opacity: 0.5;
  cursor: wait;
}

.btn-ghost {
  background: transparent;
  color: var(--fg);
}

.btn-ghost:hover {
  opacity: 1;
  background: var(--fill);
  color: var(--on-fill);
}

.done {
  text-align: center;
}

.done p {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 15px;
}

@media (min-height: 720px) {
  .shell { padding-top: 64px; }
}

/* guide page */
.top a.icon-btn {
  grid-column: 1;
  text-decoration: none;
}

.shell-guide {
  padding-top: 12px;
}

.guide-hero {
  margin: 0 0 28px;
  text-align: left;
}

.guide-kicker {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.guide-hero h1 {
  text-align: left;
  font-size: 28px;
}

.guide-lead {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.5;
}

.prose {
  font-size: 15px;
  line-height: 1.55;
}

.prose h2 {
  margin: 36px 0 12px;
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.02em;
  text-align: left;
}

.prose h3 {
  margin: 24px 0 10px;
  font-size: 16px;
  font-weight: 500;
  letter-spacing: -0.01em;
  text-align: left;
}

.prose p {
  margin: 0 0 12px;
}

.prose ul,
.prose ol {
  margin: 0 0 14px;
  padding-left: 1.2em;
  display: grid;
  gap: 6px;
}

.prose .guide-sign {
  margin-top: 18px;
  color: var(--muted);
}

.glossary {
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.glossary .term {
  margin: 0;
  padding: 12px 14px;
  border: 1px solid var(--line);
}

.glossary dt {
  margin: 0 0 4px;
  font-weight: 500;
}

.glossary dd {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.table-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 0 0 16px;
  border: 1px solid var(--line);
  -webkit-overflow-scrolling: touch;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  min-width: 460px;
}

.prose th,
.prose td {
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.prose th { font-weight: 500; }

.prose tr:last-child td { border-bottom: 0; }

.ym-pixel {
  position: absolute;
  left: -9999px;
}

/* offer guide */
.guide-hero h1 {
  font-size: 26px;
}

.guide-sub {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.5;
}

.shot-block {
  margin: 20px 0 28px;
}

.carousel {
  border: 1px solid var(--line);
  background: var(--bg);
}

.carousel-track {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.carousel-track::-webkit-scrollbar { display: none; }

.carousel-slide {
  flex: 0 0 100%;
  scroll-snap-align: start;
  scroll-snap-stop: always;
}

.carousel-slide img {
  display: block;
  width: 100%;
  height: auto;
  vertical-align: top;
}

.carousel-bar {
  display: grid;
  grid-template-columns: 40px 1fr 40px;
  align-items: center;
  border-top: 1px solid var(--line);
  min-height: 40px;
}

.carousel-bar button {
  display: grid;
  place-items: center;
  height: 40px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--fg);
  cursor: pointer;
}

.carousel-bar button:disabled {
  opacity: 0.28;
  cursor: default;
}

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 6px;
}

.carousel-dots button {
  width: 6px;
  height: 6px;
  padding: 0;
  border: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
}

.carousel-dots button.is-on {
  background: var(--fill);
}

.shot-cap {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.myths {
  margin: 8px 0 16px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.myths > div {
  margin: 0;
  padding: 14px 16px;
  border: 1px solid var(--line);
}

.myths dt {
  margin: 0 0 6px;
  font-weight: 500;
}

.myths dd {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.scheme {
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.scheme li {
  margin: 0;
  padding: 14px 16px;
  border: 1px solid var(--line);
}

.scheme strong {
  display: block;
  margin: 0 0 6px;
  font-weight: 500;
}

.scheme span {
  display: block;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.guide-cta {
  margin: 48px calc(-1 * var(--gutter)) 0;
  padding: 32px var(--gutter) 72px;
  background: var(--fill);
  color: var(--on-fill);
  box-shadow: 0 0 0 100vmax var(--fill);
  clip-path: inset(0 -100vmax -100vmax -100vmax);
}

.guide-cta .kicker {
  margin: 0 0 14px;
  color: inherit;
  opacity: 0.72;
  font-size: 12px;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.guide-cta .kicker::before { content: "[ "; }
.guide-cta .kicker::after { content: " ]"; }

.guide-cta h2 {
  margin: 0 0 14px;
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.25;
  text-align: left;
}

.guide-cta p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.5;
}

.guide-cta .price {
  margin: 20px 0 8px;
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.guide-cta .price small {
  font-size: 14px;
  font-weight: 400;
  opacity: 0.7;
  margin-left: 6px;
}

.guide-cta .fine {
  margin: 0 0 22px;
  font-size: 13px;
  opacity: 0.65;
}

.guide-cta .btn {
  background: var(--on-fill);
  color: var(--fill);
  border-color: var(--on-fill);
}

.guide-cta .tg {
  display: block;
  margin: 16px 0 0;
  color: inherit;
  font-size: 13px;
  opacity: 0.72;
  text-align: center;
}

.guide-cta .tg:hover { opacity: 1; }