@import url('https://fonts.googleapis.com/css2?family=M+PLUS+1p:wght@400;500;700;800&display=swap');

:root {
  --bg: #f4f7f9;
  --bg-deep: #e8eef2;
  --surface: #ffffff;
  --ink: #15202b;
  --muted: #5a6875;
  --line: rgba(21, 32, 43, 0.12);
  --accent: #0f6e6a;
  --accent-soft: #d9efed;
  --warn: #8a5a18;
  --radius: 18px;
  --shadow: 0 16px 40px rgba(21, 32, 43, 0.08);
  --max: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "M PLUS 1p", "Hiragino Sans", "Noto Sans JP", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, #dff0ee 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, #e7eef8 0%, transparent 45%),
    var(--bg);
  line-height: 1.75;
  font-size: 16px;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { opacity: 0.85; }

.wrap {
  width: min(var(--max), calc(100% - 2.5rem));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(12px);
  background: rgba(244, 247, 249, 0.88);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 800;
  letter-spacing: 0.02em;
}
.brand img { width: 34px; height: 34px; object-fit: contain; }
.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  align-items: center;
}
.nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
}
.nav a:hover,
.nav a.is-active { color: var(--ink); }
.nav-cta {
  display: inline-flex !important;
  align-items: center;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  background: var(--accent);
  color: #fff !important;
  text-decoration: none !important;
  font-weight: 700 !important;
}
.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 10px;
  padding: 0.45rem 0.7rem;
  font: inherit;
  color: var(--ink);
}

/* Hero */
.hero {
  padding: 4.5rem 0 3rem;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
  align-items: center;
}
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.hero h1 {
  margin: 0.9rem 0 0.8rem;
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  line-height: 1.25;
  letter-spacing: 0.02em;
  font-weight: 800;
}
.lead {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 36rem;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.6rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.8rem;
  padding: 0.65rem 1.15rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
}
.btn-primary {
  background: var(--accent);
  color: #fff !important;
}
.btn-secondary {
  background: var(--surface);
  color: var(--ink) !important;
  border-color: var(--line);
}
.hero-visual {
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
  background: var(--surface);
}
.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 320px;
}

/* Sections */
.section {
  padding: 3.5rem 0;
}
.section-head {
  display: grid;
  gap: 0.55rem;
  margin-bottom: 1.6rem;
  max-width: 42rem;
}
.section-head h2 {
  margin: 0;
  font-size: clamp(1.45rem, 3vw, 2rem);
  line-height: 1.35;
  font-weight: 800;
}
.section-head p {
  margin: 0;
  color: var(--muted);
}
.section.alt {
  background: rgba(255,255,255,0.55);
  border-block: 1px solid var(--line);
}

/* Story / timeline */
.story-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.9rem;
}
.story-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.15rem 1.1rem 1.25rem;
  box-shadow: var(--shadow);
}
.story-card .when {
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}
.story-card h3 {
  margin: 0.45rem 0 0.4rem;
  font-size: 1.05rem;
  line-height: 1.4;
}
.story-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

/* Cards */
.cards-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
}
.card.is-row {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  align-items: stretch;
}
.card.is-row .card-media { min-height: 280px; }
.card.is-row .card-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.card-media {
  min-height: 160px;
  background-size: cover;
  background-position: center;
}
.card-body { padding: 1.15rem 1.15rem 1.3rem; }
.card-body h3 {
  margin: 0.35rem 0 0.45rem;
  font-size: 1.15rem;
}
.card-body p {
  margin: 0;
  color: var(--muted);
  font-size: 0.93rem;
}
.meta-row {
  display: flex;
  justify-content: space-between;
  gap: 0.5rem;
  align-items: center;
}
.status {
  display: inline-flex;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 800;
}
.status.live { background: #e5f7ed; color: #1b7a45; }
.status.demo { background: #e8f2fb; color: #1d5f96; }
.status.oss { background: #efeafc; color: #5b45a3; }
.status.dev { background: #f6efe2; color: var(--warn); }
.card-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}
.chip {
  display: inline-flex;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 700;
}

/* Split */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.4rem;
  align-items: stretch;
}
.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.4rem;
}
.panel h3 { margin: 0 0 0.6rem; font-size: 1.2rem; }
.panel p { margin: 0 0 0.85rem; color: var(--muted); }
.facts {
  display: grid;
  grid-template-columns: 8.5rem 1fr;
  gap: 0.55rem 0.8rem;
  margin: 0;
}
.facts dt { color: var(--muted); font-size: 0.9rem; }
.facts dd { margin: 0; font-weight: 500; }

/* Member */
.member {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 0;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
}
.member img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 300px;
}
.member-avatar {
  display: grid;
  place-items: center;
  min-height: 300px;
  background:
    radial-gradient(circle at 30% 20%, #dff3f1 0%, transparent 55%),
    linear-gradient(160deg, #e7f2f1 0%, #d5e8e6 100%);
  border-right: 1px solid var(--line);
}
.member-avatar span {
  width: 7.5rem;
  height: 7.5rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--accent);
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  box-shadow: var(--shadow);
}
.member-body { padding: 1.6rem; }
.member-body h1,
.member-body h2 {
  margin: 0.35rem 0 0.4rem;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
}

/* Contact */
.contact-layout {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 1.2rem;
}
.reassure {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0 0;
}
.reassure span {
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 999px;
  padding: 0.35rem 0.75rem;
  font-size: 0.82rem;
  font-weight: 700;
}
.form {
  display: grid;
  gap: 0.85rem;
}
.form label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.9rem;
  font-weight: 700;
}
.form input,
.form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.85rem 0.95rem;
  font: inherit;
  color: var(--ink);
  background: #fbfcfd;
}
.form textarea { min-height: 150px; resize: vertical; }
.form input:focus,
.form textarea:focus {
  outline: 2px solid rgba(15, 110, 106, 0.25);
  border-color: var(--accent);
}
.honeypot { display: none !important; }

/* Footer */
.site-footer {
  margin-top: 2rem;
  padding: 2rem 0 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1rem;
}
.footer-links a {
  color: var(--muted);
  text-decoration: none;
}

.note {
  margin-top: 1.2rem;
  padding: 1rem 1.1rem;
  border-radius: 14px;
  background: #f7fafb;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

/* Blog */
.blog-list {
  display: grid;
  gap: 0.9rem;
}
.blog-item {
  display: grid;
  gap: 0.35rem;
  padding: 1.2rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.blog-item:hover {
  border-color: rgba(15, 110, 106, 0.35);
  transform: translateY(-1px);
  opacity: 1;
}
.blog-item .when {
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.03em;
}
.blog-item h3 {
  margin: 0;
  font-size: 1.15rem;
  line-height: 1.4;
}
.blog-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.93rem;
}
.blog-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.35rem;
}
.blog-tag {
  display: inline-flex;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: var(--bg-deep);
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
}
.repo-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
}
.repo-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.15rem 1.1rem;
  box-shadow: var(--shadow);
}
.repo-card h3 {
  margin: 0.35rem 0 0.45rem;
  font-size: 1.05rem;
}
.repo-card p {
  margin: 0 0 0.7rem;
  color: var(--muted);
  font-size: 0.9rem;
}
.repo-card ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
  font-size: 0.88rem;
}
.repo-card li { margin-bottom: 0.25rem; }

.article {
  max-width: 42rem;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1rem;
  color: var(--muted);
  font-size: 0.88rem;
  margin: 0.6rem 0 0;
}
.article-body {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.6rem 1.5rem 1.8rem;
}
.article-body h2 {
  margin: 1.8rem 0 0.7rem;
  font-size: 1.25rem;
  line-height: 1.4;
}
.article-body h2:first-child { margin-top: 0; }
.article-body h3 {
  margin: 1.3rem 0 0.5rem;
  font-size: 1.05rem;
}
.article-body p {
  margin: 0 0 1rem;
  color: var(--ink);
}
.article-body ul,
.article-body ol {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
  color: var(--ink);
}
.article-body li { margin-bottom: 0.35rem; }
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 1.2rem;
  font-size: 0.92rem;
}
.article-body th,
.article-body td {
  border: 1px solid var(--line);
  padding: 0.65rem 0.75rem;
  text-align: left;
  vertical-align: top;
}
.article-body th {
  background: var(--bg-deep);
  font-weight: 700;
}
.article-body .callout {
  margin: 0 0 1.2rem;
  padding: 1rem 1.1rem;
  border-radius: 14px;
  background: #f7fafb;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}
.article-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.8rem;
  margin-top: 1.4rem;
}

@media (max-width: 900px) {
  .hero-grid,
  .split,
  .contact-layout,
  .member,
  .cards-3,
  .card.is-row,
  .repo-grid {
    grid-template-columns: 1fr;
  }
  .story-grid {
    grid-template-columns: 1fr 1fr;
  }
  .menu-toggle { display: inline-flex; }
  .nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    padding-bottom: 1rem;
  }
  .nav.is-open { display: flex; }
  .header-inner { flex-wrap: wrap; }
}

@media (max-width: 560px) {
  .story-grid { grid-template-columns: 1fr; }
  .wrap { width: min(var(--max), calc(100% - 1.5rem)); }
  .hero { padding-top: 2.8rem; }
}