:root {
  --bg: #12161b;
  --bg-elevated: #1a2027;
  --bg-panel: #202730;
  --bg-panel-soft: #171c23;
  --line: #313a45;
  --line-strong: #495464;
  --text: #dde3ea;
  --text-soft: #aab4c0;
  --text-faint: #86919d;
  --accent: #c0ccd8;
  --accent-soft: #91a0b2;
  --link: #dbe6f3;
  --link-hover: #ffffff;
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.28);
  --content-width: 880px;
}

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

html {
  background: var(--bg);
  color-scheme: dark;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(120, 138, 160, 0.08), transparent 34%),
    linear-gradient(180deg, #151a20 0%, #101419 100%);
  overflow-x: hidden;
}

body .top-nav {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--line);
  background: rgba(12, 15, 19, 0.92);
  backdrop-filter: blur(6px);
}

body .top-nav__search {
  width: min(100%, var(--content-width));
  margin: 0 auto;
}

body .top-nav__search input {
  flex: 1 1 auto;
  min-width: 0;
  height: 40px;
  padding: 0 0.8rem;
  color: var(--text);
  background: #0f1419;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  outline: none;
}

body .top-nav__search input::placeholder {
  color: var(--text-faint);
}

body .top-nav__search input:focus {
  border-color: var(--accent-soft);
  box-shadow: 0 0 0 3px rgba(145, 160, 178, 0.12);
}

body .top-nav__search button {
  flex: 0 0 auto;
  height: 40px;
  padding: 0 1rem;
  color: var(--text);
  background: linear-gradient(180deg, #28313b 0%, #202731 100%);
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  font-weight: 600;
  letter-spacing: 0.03em;
}

body .top-nav__search button:hover,
body .top-nav__search button:focus-visible {
  background: linear-gradient(180deg, #303a46 0%, #242d38 100%);
}

.site-container {
  width: min(calc(100% - 2rem), calc(var(--content-width) + 6rem));
  margin: 0 auto;
  padding: 1.5rem 0 4rem;
}

.site-header {
  margin-bottom: 1rem;
  padding: 0.25rem 0 0.75rem;
  border-bottom: 1px solid rgba(73, 84, 100, 0.45);
}

.site-title {
  color: var(--text);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.site-title:hover,
.site-title:focus-visible {
  color: var(--link-hover);
  text-decoration: none;
}

.content {
  min-width: 0;
}

.article {
  background: linear-gradient(180deg, rgba(29, 35, 43, 0.94), rgba(23, 28, 35, 0.98));
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.article-header {
  padding: 1.6rem 1.6rem 1rem;
  border-bottom: 1px solid rgba(73, 84, 100, 0.5);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent);
}

.article-title {
  margin: 0;
  color: #f3f6f9;
  font-size: clamp(1.5rem, 2vw + 1rem, 2.2rem);
  line-height: 1.3;
  letter-spacing: 0.03em;
  overflow-wrap: anywhere;
}

.article-body {
  padding: 1.5rem 1.6rem 1.75rem;
  color: var(--text);
  overflow-wrap: anywhere;
}

.article-body > :first-child {
  margin-top: 0;
}

.article-body section + section {
  margin-top: 1.5rem;
  padding-top: 1.2rem;
  border-top: 1px solid rgba(73, 84, 100, 0.35);
}

.article-body h2,
.article-body h3 {
  margin: 0 0 0.85rem;
  color: #f4f7fa;
  line-height: 1.4;
}

.article-body h2 {
  font-size: 1.1rem;
  letter-spacing: 0.08em;
}

.article-body h3 {
  font-size: 1rem;
}

.article-body p,
.article-body ul,
.article-body ol,
.article-body table,
.article-body blockquote {
  margin: 0 0 1rem;
}

.article-body ul,
.article-body ol {
  padding-left: 1.35rem;
}

.article-body li + li {
  margin-top: 0.35rem;
}

.article-body a {
  color: var(--link);
  text-underline-offset: 0.16em;
  word-break: break-word;
}

.article-body a:hover,
.article-body a:focus-visible {
  color: var(--link-hover);
}

.article-body strong {
  color: #f3f6f9;
}

.article-body blockquote {
  padding: 0.8rem 1rem;
  border-left: 3px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-soft);
}

.article-body img {
  display: block;
  width: auto;
  max-width: min(100%, 420px);
  height: auto;
  margin: 0.9rem auto 1.1rem;
  border: 1px solid var(--line);
}

.case-action {
  margin-top: 1.1rem;
}

.case-action__button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0.7rem 1rem;
  color: var(--text);
  background: linear-gradient(180deg, #29323d 0%, #212932 100%);
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  font: inherit;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
}

.case-action__button:hover,
.case-action__button:focus-visible {
  background: linear-gradient(180deg, #323d49 0%, #27303a 100%);
}

.case-action__result {
  margin-top: 0.85rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
}

.case-action__result[hidden] {
  display: none;
}

.report-share {
  margin-top: 1.5rem;
}

.report-share__link {
  display: inline-block;
  text-decoration: none;
}

.case-modal.hidden {
  display: none;
}

.case-modal {
  position: fixed;
  inset: 0;
  z-index: 1200;
}

.case-modal__overlay {
  position: absolute;
  inset: 0;
  background: rgba(3, 5, 7, 0.76);
}

.case-modal__content {
  position: relative;
  width: min(calc(100% - 2rem), 520px);
  margin: 10vh auto 0;
  padding: 1.3rem 1.25rem 1.1rem;
  background: linear-gradient(180deg, #1d242c 0%, #161b22 100%);
  border: 1px solid var(--line-strong);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.42);
  max-height: min(78vh, 720px);
  overflow-y: auto;
}

.case-modal__content h2 {
  margin: 0 0 0.7rem;
  color: #f4f7fa;
  font-size: 1.15rem;
}

.case-modal__content p {
  margin: 0 0 0.9rem;
}

.case-modal__choices {
  margin-top: 1rem;
}

.case-modal__choice {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.75rem 0.85rem;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
}

.case-modal__choice + .case-modal__choice {
  margin-top: 0.65rem;
}

.case-modal__choice input {
  margin: 0;
}

.case-modal__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1rem;
}

.case-modal__secondary {
  min-height: 42px;
  padding: 0.7rem 1rem;
  color: var(--text-soft);
  background: #151a20;
  border: 1px solid var(--line);
  border-radius: 2px;
  font: inherit;
  cursor: pointer;
}

.case-modal__feedback {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(73, 84, 100, 0.4);
}

.case-modal__feedback[hidden] {
  display: none;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  background: rgba(10, 13, 17, 0.2);
}

.article-body th,
.article-body td {
  padding: 0.72rem 0.8rem;
  border: 1px solid var(--line);
  vertical-align: top;
}

.article-body th {
  width: 32%;
  color: #f0f4f8;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.04);
}

.article-body td {
  color: var(--text);
}

.site-footer {
  margin-top: 1rem;
  padding: 1rem 0 0;
  border-top: 1px solid rgba(73, 84, 100, 0.45);
  color: var(--text-faint);
  font-size: 0.92rem;
}

.site-footer p {
  margin: 0.2rem 0;
}

.page-counter,
#page-counter {
  border: 1px solid rgba(160, 174, 192, 0.26);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.24);
}

@media (max-width: 720px) {
  .site-container {
    width: min(calc(100% - 1rem), calc(var(--content-width) + 2rem));
    padding-top: 1rem;
  }

  .article-header {
    padding: 1.2rem 1rem 0.85rem;
  }

  .article-body {
    padding: 1.1rem 1rem 1.3rem;
  }

  .article-body th,
  .article-body td {
    padding: 0.62rem 0.65rem;
  }

  .case-modal__content {
    width: min(calc(100% - 1rem), 520px);
    margin-top: 7vh;
    padding: 1.1rem 1rem 1rem;
  }
}

@media (max-width: 560px) {
  body .top-nav {
    padding: 0.75rem;
  }

  body .top-nav__search {
    flex-direction: column;
    align-items: stretch;
  }

  body .top-nav__search button {
    width: 100%;
  }

  .article-title {
    font-size: 1.3rem;
    line-height: 1.35;
  }

  .article-body {
    font-size: 0.95rem;
  }

  .article-body h2 {
    font-size: 1rem;
    letter-spacing: 0.05em;
  }

  .article-body table,
  .article-body thead,
  .article-body tbody,
  .article-body tr,
  .article-body th,
  .article-body td {
    display: block;
  }

  .article-body thead {
    display: none;
  }

  .article-body tr + tr {
    margin-top: 0.65rem;
  }

  .article-body th,
  .article-body td {
    width: 100%;
    border-bottom: none;
    padding: 0.58rem 0.6rem;
  }

  .article-body td:last-child {
    border-bottom: 1px solid var(--line);
  }

  .case-action__button,
  .case-modal__secondary {
    width: 100%;
  }

  .case-modal__content {
    width: calc(100% - 0.75rem);
    margin-top: 4vh;
    padding: 0.95rem 0.85rem 0.9rem;
    max-height: 88vh;
  }

  .case-modal__actions {
    flex-direction: column;
  }

  .case-modal__choice {
    padding: 0.7rem 0.75rem;
  }

  .site-footer {
    font-size: 0.84rem;
  }

  .page-counter,
  #page-counter {
    right: 8px !important;
    bottom: 8px !important;
    padding: 0.4rem 0.7rem;
    font-size: 11px;
  }
}

@media (max-width: 380px) {
  .site-container {
    width: calc(100% - 0.5rem);
    padding-top: 0.75rem;
  }

  .article-header {
    padding: 1rem 0.8rem 0.75rem;
  }

  .article-body {
    padding: 0.95rem 0.8rem 1.1rem;
    font-size: 0.92rem;
  }
}