:root {
  color-scheme: dark;
  --bg: #111417;
  --panel: #181d21;
  --line: rgba(229, 233, 236, 0.13);
  --text: #f2f5f6;
  --muted: #9aa8ae;
  --soft: #d4dcdf;
  --accent: #69d2c7;
  --accent-2: #d7f575;
  --warn: #f0be6a;
  --bad: #f27e7e;
  --radius: 8px;
  --font-body: "Noto Sans JP", system-ui, sans-serif;
  --font-display: "Outfit", "Noto Sans JP", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100dvh;
  background:
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px) 0 0 / 72px 72px,
    radial-gradient(circle at 76% 8%, rgba(105,210,199,.13), transparent 30rem),
    linear-gradient(180deg, #111417 0%, #15191d 48%, #101316 100%);
  color: var(--text);
  font-family: var(--font-body);
  letter-spacing: 0;
}
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  width: min(100% - 40px, 1380px);
  margin: 14px auto 0;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(17,20,23,.84);
  backdrop-filter: blur(18px);
}
.brand {
  display: inline-flex;
  align-items: center;
  min-width: 132px;
  padding-left: 8px;
}

.brand img {
  display: block;
  width: 118px;
  height: auto;
  object-fit: contain;
}
.nav-links { display: flex; justify-content: center; gap: 8px; }
.nav-links a {
  padding: 10px 13px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}
.join-button, .primary-link, .secondary-link {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  font-weight: 800;
  transition: transform 160ms ease, background 160ms ease;
}
.join-button, .primary-link {
  border: 0;
  padding: 0 18px;
  background: var(--accent);
  color: #10201e;
}
.secondary-link {
  border: 1px solid var(--line);
  padding: 0 18px;
  background: rgba(255,255,255,.045);
  color: var(--soft);
}
.join-button:active, .primary-link:active, .secondary-link:active { transform: translateY(1px); }

.hero-section {
  display: grid;
  grid-template-columns: minmax(0,.98fr) minmax(420px,1.02fr);
  gap: 54px;
  align-items: center;
  width: min(100% - 40px, 1380px);
  min-height: calc(100dvh - 84px);
  margin: 0 auto;
  padding: 54px 0 44px;
}
.eyebrow {
  margin: 0 0 18px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { font-family: var(--font-display); }
h1 {
  margin-bottom: 24px;
  max-width: 760px;
  font-size: clamp(48px, 7vw, 100px);
  line-height: .94;
  font-weight: 800;
}
.hero-lead { max-width: 640px; color: var(--soft); font-size: 17px; line-height: 1.95; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.certificate-preview {
  min-height: 520px;
  padding: 28px;
  border: 1px solid rgba(105,210,199,.32);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 50% 42%, rgba(105,210,199,.18), transparent 13rem),
    linear-gradient(145deg, rgba(24,29,33,.94), rgba(17,20,23,.86));
  box-shadow: 0 34px 80px rgba(0,0,0,.28), inset 0 1px 0 rgba(255,255,255,.08);
}
.cert-top, .cert-code {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
}
.cert-top b { color: var(--accent-2); }
.cert-orbit {
  position: relative;
  width: min(74vw, 260px);
  aspect-ratio: 1;
  margin: 58px auto 38px;
  border: 1px solid rgba(105,210,199,.34);
  border-radius: 50%;
}
.cert-orbit::before, .cert-orbit::after {
  content: "";
  position: absolute;
  inset: 20%;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 50%;
}
.cert-orbit::after { inset: 39%; background: var(--accent); box-shadow: 0 0 32px rgba(105,210,199,.55); }
.cert-orbit span {
  position: absolute;
  left: 22%;
  top: 28%;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-2);
}
.certificate-preview h2 { margin-bottom: 12px; font-size: clamp(36px, 4vw, 58px); line-height: 1; }
.certificate-preview p { color: var(--soft); line-height: 1.8; }
.cert-code {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--accent);
}

.notice, .section-shell, .trust-strip, .site-footer {
  width: min(100% - 40px, 1380px);
  margin-left: auto;
  margin-right: auto;
}
.notice {
  padding: 14px 18px;
  border-radius: var(--radius);
  font-weight: 700;
}
.notice.error { border: 1px solid rgba(242,126,126,.35); background: rgba(242,126,126,.12); color: #ffd5d5; }
.notice.success { border: 1px solid rgba(105,210,199,.36); background: rgba(105,210,199,.13); color: var(--accent); }
.trust-strip {
  display: grid;
  grid-template-columns: 1fr 1.1fr 1fr;
  gap: 1px;
  overflow: hidden;
  margin-bottom: 88px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}
.trust-strip div { padding: 22px; background: rgba(24,29,33,.88); }
.trust-strip strong, .trust-strip span { display: block; }
.trust-strip span { margin-top: 8px; color: var(--muted); font-size: 13px; line-height: 1.7; }

.section-shell { margin-bottom: 110px; }
.section-heading {
  display: grid;
  grid-template-columns: minmax(0,.92fr) minmax(280px,.6fr);
  gap: 34px;
  align-items: end;
  margin-bottom: 30px;
}
.section-heading.compact { display: block; }
.section-heading h2 {
  margin-bottom: 0;
  font-size: clamp(34px, 4.6vw, 66px);
  line-height: 1;
}
.section-heading p:last-child { color: var(--muted); line-height: 1.85; }

.community-first {
  padding-top: 8px;
}

.connection-grid {
  display: grid;
  grid-template-columns: 1.18fr .82fr 1fr 1.06fr;
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}

.connection-grid article {
  min-height: 250px;
  padding: 24px;
  background:
    radial-gradient(circle at 72% 18%, rgba(105,210,199,.11), transparent 11rem),
    rgba(24,29,33,.86);
}

.connection-grid span {
  display: block;
  margin-bottom: 54px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 800;
}

.connection-grid strong {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-display);
  font-size: 26px;
  line-height: 1.05;
}

.connection-grid p {
  color: var(--muted);
  line-height: 1.75;
}

.library-categories {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}

.library-categories article {
  min-height: 190px;
  padding: 18px;
  background: rgba(24,29,33,.86);
}

.library-categories span {
  display: block;
  margin-bottom: 38px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
}

.library-categories strong {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-display);
  font-size: 20px;
  line-height: 1.1;
}

.library-categories p {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.article-grid article {
  min-height: 260px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(24,29,33,.72);
}

.article-grid article.featured {
  background:
    radial-gradient(circle at 82% 12%, rgba(105,210,199,.14), transparent 10rem),
    rgba(24,29,33,.92);
  border-color: rgba(105,210,199,.32);
}

.article-grid small {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
}

.article-grid h3 {
  margin: 28px 0 12px;
  font-size: 26px;
  line-height: 1.05;
}

.article-grid p {
  color: var(--soft);
  line-height: 1.75;
}

.article-grid a {
  display: inline-flex;
  margin-top: 16px;
  color: var(--accent-2);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 800;
}

.auth-grid, .community-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.auth-single {
  max-width: 560px;
}
.panel, .level-panel, .rank-panel, .exam-form fieldset, .case-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(24,29,33,.82);
}
.panel, .level-panel, .rank-panel, .exam-form fieldset, .case-card { padding: 24px; }
label { display: grid; gap: 8px; margin: 16px 0; color: var(--soft); font-size: 13px; font-weight: 700; }
input, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255,255,255,.055);
  color: var(--text);
  padding: 12px 13px;
}
textarea { min-height: 110px; resize: vertical; }
.exam-form { display: grid; gap: 16px; }
.exam-form fieldset { margin: 0; }
.exam-form legend { padding: 0 0 10px; font-weight: 800; }
.exam-form label { display: flex; align-items: flex-start; gap: 10px; font-size: 14px; }
.exam-form input[type="radio"] { width: auto; margin-top: 5px; }

.pedia-grid,
.category-map {
  display: grid;
  grid-template-columns: 1.2fr .8fr 1fr 1fr;
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}
.pedia-grid article,
.category-map article {
  min-height: 178px;
  padding: 22px;
  background: rgba(24,29,33,.86);
}
.pedia-grid small,
.category-map small { color: var(--accent); font-family: var(--font-mono); font-weight: 700; }
.pedia-grid strong,
.category-map strong { display: block; margin: 14px 0 10px; font-family: var(--font-display); font-size: 22px; }
.pedia-grid span,
.category-map p { display: block; color: var(--muted); line-height: 1.75; }
.category-map {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.category-map ul {
  display: grid;
  gap: 8px;
  padding: 14px 0 0;
  margin: 18px 0 0;
  border-top: 1px solid var(--line);
  color: var(--soft);
  font-size: 13px;
  line-height: 1.55;
  list-style: none;
}
.category-map li::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--accent);
  vertical-align: 1px;
}

.profile-row { display: flex; gap: 16px; align-items: center; margin-bottom: 22px; }
.avatar {
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  border: 1px solid rgba(105,210,199,.42);
  border-radius: 50%;
  background: rgba(105,210,199,.12);
  color: var(--accent);
  font-family: var(--font-mono);
  font-weight: 800;
}
.profile-row strong, .profile-row span { display: block; }
.profile-row strong { font-family: var(--font-display); font-size: 28px; }
.rank-title {
  display: inline-flex !important;
  align-items: center;
  gap: 9px;
  position: relative;
}

.rank-info {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.45;
}

.rank-info summary {
  display: inline-grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border: 1px solid rgba(105,210,199,.45);
  border-radius: 50%;
  background: rgba(105,210,199,.12);
  color: var(--accent);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 800;
  list-style: none;
}

.rank-info summary::-webkit-details-marker {
  display: none;
}

.rank-info div {
  position: absolute;
  left: 0;
  top: calc(100% + 12px);
  width: min(82vw, 430px);
  padding: 18px;
  border: 1px solid rgba(105,210,199,.3);
  border-radius: var(--radius);
  background: rgba(17,20,23,.98);
  box-shadow: 0 24px 60px rgba(0,0,0,.42);
  z-index: 30;
}

.rank-info b {
  display: block;
  color: var(--text);
  font-family: var(--font-display);
  font-size: 18px;
}

.rank-info p {
  margin: 8px 0 0;
  color: var(--soft);
  font-size: 13px;
}

.rank-info ul {
  display: grid;
  gap: 9px;
  padding: 12px 0 0;
  margin: 12px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.rank-info li {
  color: var(--soft);
  font-size: 13px;
}

.rank-info li span {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11px;
}
.profile-row span, .muted { color: var(--muted); }
.rank-progress {
  margin: 4px 0 24px;
}

.rank-progress div {
  height: 9px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255,255,255,.08);
}

.rank-progress span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.rank-progress p {
  margin: 9px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}
.certificate-row {
  padding: 16px 0;
  border-top: 1px solid var(--line);
}
.certificate-row b, .certificate-row span { display: block; }
.certificate-row span { margin-top: 6px; color: var(--accent); font-family: var(--font-mono); font-size: 12px; }
.text-button {
  margin-top: 20px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

.invite-panel {
  margin-top: 18px;
  padding: 22px;
  border: 1px solid rgba(105,210,199,.32);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 86% 10%, rgba(105,210,199,.13), transparent 12rem),
    rgba(24,29,33,.86);
}

.invite-panel h3,
.reward-policy h3 {
  margin-bottom: 10px;
  font-size: 24px;
}

.invite-panel input {
  margin-top: 14px;
  font-family: var(--font-mono);
  color: var(--accent);
}

.reward-policy {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}

.reward-policy h3 {
  grid-column: 1 / -1;
  margin: 0;
  padding: 18px;
  background: rgba(24,29,33,.9);
}

.reward-policy article {
  min-height: 148px;
  padding: 18px;
  background: rgba(24,29,33,.84);
}

.reward-policy strong,
.reward-policy span,
.reward-policy em {
  display: block;
}

.reward-policy strong {
  font-family: var(--font-display);
  font-size: 19px;
}

.reward-policy span {
  margin-top: 10px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 800;
}

.reward-policy em {
  margin-top: 6px;
  color: var(--accent-2);
  font-size: 12px;
  font-style: normal;
  font-weight: 800;
}

.reward-policy p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.rank-ladder {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
}

.rank-ladder article {
  min-height: 152px;
  padding: 16px;
  background: rgba(24,29,33,.82);
}

.rank-ladder article.current {
  background:
    radial-gradient(circle at 80% 8%, rgba(105,210,199,.17), transparent 8rem),
    rgba(24,29,33,.94);
}

.rank-ladder span,
.rank-ladder em {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-style: normal;
  font-weight: 800;
}

.rank-ladder span {
  color: var(--accent);
}

.rank-ladder strong {
  display: block;
  margin: 12px 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1.1;
}

.rank-ladder em {
  color: var(--accent-2);
}

.rank-ladder p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.management-roles {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  margin-top: 18px;
  border: 1px solid rgba(215,245,117,.22);
  border-radius: var(--radius);
  background: rgba(215,245,117,.22);
}

.management-roles h3 {
  grid-column: 1 / -1;
  margin: 0;
  padding: 18px;
  background: rgba(24,29,33,.9);
  font-size: 24px;
}

.management-roles article {
  padding: 18px;
  background: rgba(24,29,33,.84);
}

.management-roles strong {
  display: block;
  color: var(--accent-2);
  font-family: var(--font-display);
  font-size: 20px;
}

.management-roles p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.case-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.case-status {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  background: rgba(240,190,106,.14);
  color: var(--warn);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
}
.case-card h3 { margin: 16px 0 10px; font-size: 24px; line-height: 1.05; }
.case-card p { color: var(--soft); line-height: 1.8; }
.case-card a { display: inline-flex; margin-top: 10px; color: var(--accent); font-family: var(--font-mono); font-size: 12px; font-weight: 700; }

.site-footer {
  padding: 30px 0 42px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
}

@media (max-width: 980px) {
  .site-header { grid-template-columns: auto auto; }
  .nav-links { display: none; }
  .hero-section, .section-heading, .auth-grid, .community-layout { grid-template-columns: 1fr; }
  .hero-section { min-height: auto; padding-top: 38px; }
  .trust-strip, .connection-grid, .library-categories, .article-grid, .pedia-grid, .category-map, .rank-ladder, .management-roles, .reward-policy, .case-list { grid-template-columns: 1fr; }
  .management-roles h3 { grid-column: auto; }
  .reward-policy h3 { grid-column: auto; }
}
@media (max-width: 680px) {
  .site-header, .hero-section, .notice, .trust-strip, .section-shell, .site-footer { width: min(100% - 28px, 1380px); }
  h1 { font-size: 48px; }
  .hero-lead { font-size: 15px; }
  .join-button { padding-inline: 13px; }
  .brand { min-width: 108px; }
  .brand img { width: 96px; }
  .certificate-preview { min-height: 420px; }
}