:root {
  --ink: #13212e;
  --muted: #5b6a78;
  --line: #dce5ed;
  --line-strong: #c8d5df;
  --surface: #ffffff;
  --surface-alt: #f6f9fc;
  --blue: #087cff;
  --blue-dark: #0065da;
  --blue-soft: #eaf4ff;
  --shadow: 0 16px 42px rgba(21, 49, 73, 0.08);
  --radius: 18px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: var(--surface-alt);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

button, textarea { font: inherit; }
a { color: inherit; }
img { display: block; max-width: 100%; }

.shell {
  width: min(1160px, calc(100% - 40px));
  margin-inline: auto;
}

.site-header {
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  min-height: 86px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  width: 300px;
  height: 74px;
  overflow: hidden;
  display: block;
  flex: 0 0 auto;
}

.brand picture { display: block; }
.brand-logo {
  width: 300px;
  height: auto;
  transform: translateY(-49px);
}

.header-note,
.back-link {
  margin: 0;
  color: var(--muted);
  font-size: 0.875rem;
  font-weight: 650;
}

.back-link { color: var(--blue-dark); text-underline-offset: 4px; }

.intro {
  padding-block: 42px 24px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 6px;
  color: var(--blue-dark);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.16em;
}

h1, h2, p { overflow-wrap: anywhere; }

h1 {
  margin: 0;
  font-size: clamp(1.75rem, 4vw, 2.65rem);
  line-height: 1.3;
  letter-spacing: -0.035em;
}

.tagline {
  margin: 8px 0 18px;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.2rem);
  font-weight: 650;
}

.trust-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.trust-list li {
  padding: 7px 12px;
  color: #294156;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 650;
}

.trust-list span { color: var(--blue); }

.tool-section { padding-block: 18px 50px; }
.section-heading { margin-bottom: 20px; }
.compact-heading { margin-bottom: 14px; }

h2 {
  margin: 0;
  font-size: clamp(1.4rem, 3vw, 2rem);
  line-height: 1.4;
  letter-spacing: -0.025em;
}

.section-lead {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.85;
}

.tool-description {
  max-width: 900px;
  margin: 22px 0 0;
}

.tool-panel {
  padding: clamp(18px, 3.2vw, 34px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.input-label {
  display: block;
  margin-bottom: 9px;
  font-size: 0.92rem;
  font-weight: 750;
}

textarea {
  display: block;
  width: 100%;
  min-height: 390px;
  padding: 20px;
  color: var(--ink);
  background: #fcfdff;
  border: 1.5px solid var(--line-strong);
  border-radius: 13px;
  outline: none;
  resize: vertical;
  font-size: 1rem;
  line-height: 1.8;
  transition: border-color 140ms ease, box-shadow 140ms ease;
}

textarea::placeholder { color: #8695a2; }
textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(8, 124, 255, 0.12);
}

.tool-actions {
  min-height: 58px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding-block: 16px 10px;
}

.button {
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 750;
  transition: transform 120ms ease, background-color 120ms ease, border-color 120ms ease;
}

.button:hover { transform: translateY(-1px); }
.button:focus-visible { outline: 3px solid rgba(8, 124, 255, 0.3); outline-offset: 2px; }
.button-primary { color: #fff; background: var(--blue); }
.button-primary:hover { background: var(--blue-dark); }
.button-secondary { color: var(--blue-dark); background: var(--blue-soft); border-color: #cfe6ff; }
.button-ghost { color: #405365; background: #fff; border-color: var(--line-strong); }

.action-status {
  min-width: 8em;
  margin: 0 0 0 4px;
  color: var(--blue-dark);
  font-size: 0.875rem;
  font-weight: 700;
}

.privacy-note {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 0.875rem;
}
.privacy-icon { color: var(--blue); font-size: 0.62rem; vertical-align: 0.12em; }

.results {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.result-card {
  min-height: 118px;
  padding: 17px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: var(--surface-alt);
  border: 1px solid var(--line);
  border-radius: 13px;
}

.result-card-featured {
  color: #fff;
  background: linear-gradient(135deg, #0b86ff 0%, #0766e5 100%);
  border-color: transparent;
}

.result-card p,
.social-card p {
  margin: 0;
  font-size: 0.85rem;
  font-weight: 700;
}

.result-card output,
.social-card output {
  display: block;
  font-size: clamp(1.55rem, 3.2vw, 2.1rem);
  font-weight: 800;
  line-height: 1.15;
  font-variant-numeric: tabular-nums;
}

.result-card output span,
.social-card output span {
  margin-left: 4px;
  font-size: 0.75rem;
  font-weight: 700;
}

.content-section { padding-block: 44px; }

.social-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.social-card {
  min-height: 128px;
  padding: 22px;
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.service-mark {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  color: #fff;
  background: var(--blue);
  border-radius: 12px;
  font-size: 1.1rem;
  font-weight: 850;
}
.service-mark-x { background: var(--ink); }
.social-card output { margin-top: 7px; }
.count-note { margin: 13px 0 0; color: var(--muted); font-size: 0.82rem; }

.explain {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  padding-block: 18px 72px;
}

.text-card {
  padding: clamp(24px, 3vw, 36px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.text-card > p:not(.section-kicker) { margin: 16px 0 0; color: var(--muted); }

.steps { margin: 20px 0 0; padding: 0; list-style: none; }
.steps li { display: flex; align-items: center; gap: 12px; padding: 10px 0; border-bottom: 1px solid #e9eff4; }
.steps li:last-child { border-bottom: 0; }
.steps span {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  color: var(--blue-dark);
  background: var(--blue-soft);
  border-radius: 50%;
  font-size: 0.82rem;
  font-weight: 800;
}
.steps p { margin: 0; color: #33495b; }

.site-footer { color: #cad5df; background: var(--ink); }
.footer-inner {
  min-height: 190px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.footer-inner p { margin: 0; }
.footer-logo-frame {
  width: 260px;
  height: 62px;
  overflow: hidden;
}
.footer-logo {
  width: 260px;
  height: auto;
  transform: translateY(-43px);
}
.footer-meta { text-align: right; font-size: 0.875rem; }
.footer-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 5px;
  margin-top: 10px;
}
.footer-links a { color: #fff; text-underline-offset: 4px; }
.footer-links span { color: #8293a2; }

.policy-main { max-width: 880px; padding-block: 62px 80px; }
.policy-main h1 { margin-bottom: 14px; }
.policy-lead { margin: 0 0 32px; color: var(--muted); font-size: 1.05rem; }
.policy-card { margin-top: 16px; padding: 28px 30px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
.policy-card h2 { font-size: 1.25rem; }
.policy-card p, .policy-card ul { margin: 14px 0 0; color: var(--muted); }
.policy-card ul { padding-left: 1.4em; }
.policy-card li + li { margin-top: 7px; }

@media (max-width: 860px) {
  .results { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .social-grid { grid-template-columns: 1fr; }
  .explain { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .shell { width: min(100% - 28px, 1160px); }
  .header-inner { min-height: 78px; gap: 12px; }
  .brand { width: 145px; height: 70px; }
  .brand-logo { width: 160px; transform: translateY(-17px); }
  .header-note { max-width: 130px; text-align: right; line-height: 1.5; }
  .back-link { font-size: 0.8rem; }
  .intro { padding-block: 30px 14px; }
  .trust-list { display: grid; grid-template-columns: 1fr; }
  .trust-list li { width: fit-content; }
  .tool-section { padding-block: 14px 34px; }
  .tool-panel { border-radius: 18px; }
  textarea { min-height: 285px; padding: 16px; }
  .tool-actions { display: grid; grid-template-columns: 1fr 1fr; }
  .button { width: 100%; min-height: 48px; padding-inline: 12px; }
  .button-ghost { grid-column: 1 / -1; }
  .action-status { grid-column: 1 / -1; min-height: 1.5em; margin: 0; }
  .result-card { min-height: 108px; padding: 14px; }
  .result-card p { font-size: 0.78rem; line-height: 1.5; }
  .content-section { padding-block: 34px; }
  .social-card { min-height: 112px; padding: 18px; }
  .explain { padding-block: 8px 50px; }
  .text-card { padding: 24px 20px; }
  .footer-inner { min-height: 220px; align-items: flex-start; flex-direction: column; justify-content: center; gap: 24px; }
  .footer-meta { text-align: left; }
  .footer-links { justify-content: flex-start; }
  .policy-main { padding-block: 42px 58px; }
  .policy-card { padding: 23px 20px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}