@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700&display=swap");

:root {
  --ink: #162126;
  --ink-soft: #4b5d55;
  --surface: #f4f6f5;
  --surface-strong: #e5ece7;
  --card: #ffffff;
  --line: rgba(22, 33, 38, 0.14);
  --accent: #2f6b57;
  --accent-strong: #255645;
  --accent-soft: #dce7df;
  --accent-warm: #caa453;
  --shadow: 0 18px 40px rgba(22, 33, 38, 0.1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", sans-serif;
  background: linear-gradient(180deg, var(--card), var(--surface));
  color: var(--ink);
  line-height: 1.6;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

.section-inner {
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 14px 24px;
  background: rgba(244, 246, 245, 0.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
}

.logo {
  height: 52px;
  width: auto;
}

.header-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 18px;
}

.header-nav a {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--ink);
}

.header-nav a:hover,
.header-nav a:focus-visible,
.inline-link:hover,
.inline-link:focus-visible {
  color: var(--accent);
}

.page-hero,
.content-section,
.site-footer {
  padding-left: 24px;
  padding-right: 24px;
}

.page-hero {
  padding-top: 72px;
  padding-bottom: 28px;
}

.kicker {
  margin-bottom: 16px;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--accent);
}

.page-hero h1 {
  max-width: 720px;
  margin-bottom: 18px;
  font-size: 3.3rem;
  line-height: 1.05;
}

.page-hero p {
  max-width: 760px;
  font-size: 1.08rem;
  color: var(--ink-soft);
}

.content-section {
  padding-top: 20px;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 26px;
  box-shadow: var(--shadow);
}

.panel h2 {
  margin-bottom: 12px;
  font-size: 1.5rem;
  line-height: 1.2;
}

.panel p {
  color: var(--ink-soft);
}

.panel p + p {
  margin-top: 12px;
}

.mail-link,
.response-note {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 700;
  margin-top: 18px;
}

.mail-link {
  background: var(--accent);
  color: var(--card);
  word-break: break-word;
}

.mail-link:hover,
.mail-link:focus-visible {
  background: var(--accent-strong);
}

.response-note {
  background: var(--accent-soft);
  color: var(--accent);
}

.detail-copy {
  margin-top: 18px;
}

.topic-list {
  list-style: none;
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.topic-list li {
  position: relative;
  padding: 18px 18px 18px 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(229, 236, 231, 0.5));
  color: var(--ink);
}

.topic-list li::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 26px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-warm);
}

.inline-link {
  color: var(--accent);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.site-footer {
  margin-top: 40px;
  padding-top: 20px;
  padding-bottom: 28px;
  border-top: 1px solid var(--line);
}

.site-footer p {
  font-weight: 600;
}

@media (max-width: 900px) {
  .info-grid {
    grid-template-columns: 1fr;
  }

  .page-hero h1 {
    font-size: 2.8rem;
  }
}

@media (max-width: 640px) {
  .site-header,
  .page-hero,
  .content-section,
  .site-footer {
    padding-left: 20px;
    padding-right: 20px;
  }

  .site-header {
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .header-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .header-nav {
    justify-content: flex-start;
  }

  .logo {
    height: 46px;
  }

  .page-hero {
    padding-top: 48px;
    padding-bottom: 20px;
  }

  .page-hero h1 {
    font-size: 2.2rem;
  }

  .page-hero p,
  .panel p,
  .topic-list li {
    font-size: 1rem;
  }

  .panel {
    padding: 22px;
  }

  .panel h2 {
    font-size: 1.3rem;
  }
}