:root {
  --ink: #17211f;
  --muted: #667471;
  --line: #d9e2dc;
  --paper: #fbfaf4;
  --paper-strong: #fffefd;
  --teal: #008c87;
  --teal-dark: #006b68;
  --orange: #f28a19;
  --yellow: #f7d86b;
  --green: #9ccd8d;
  --shadow: 0 24px 70px rgba(23, 33, 31, .13);
  --bg-radial-a: rgba(0, 140, 135, .18);
  --bg-radial-b: rgba(242, 138, 25, .14);
  --bg-start: #f8f1df;
  --bg-mid: #f5f8ef;
  --bg-end: #eef7f5;
  --surface: rgba(255, 254, 253, .82);
  --surface-strong: rgba(255, 254, 253, .74);
  --surface-topbar: rgba(251, 250, 244, .84);
  --surface-accent: #e8f4ef;
  --surface-accent-2: #eef9f6;
  --hero-overlay-a: rgba(255,255,255,.88);
  --hero-overlay-b: rgba(255,248,225,.86);
  --hero-grid: rgba(0,140,135,.05);
  --button-bg: #ffffff;
  --quick-card-bg: rgba(255,255,255,.74);
  --legacy-card-bg: #ffffff;
  --image-panel-bg: #eef2ef;
  --notice-bg: #fff7e8;
  font-family: "Trebuchet MS", Verdana, sans-serif;
}

html[data-theme="dark"] {
  --ink: #edf3f1;
  --muted: #a9bbb6;
  --line: #334844;
  --paper: #0e1516;
  --paper-strong: #152021;
  --teal: #41b9b0;
  --teal-dark: #79d5cf;
  --orange: #f4a548;
  --yellow: #f4d77d;
  --green: #89ba81;
  --shadow: 0 24px 70px rgba(0, 0, 0, .34);
  --bg-radial-a: rgba(65, 185, 176, .14);
  --bg-radial-b: rgba(244, 165, 72, .10);
  --bg-start: #0a1112;
  --bg-mid: #10181a;
  --bg-end: #0f1718;
  --surface: rgba(18, 28, 29, .9);
  --surface-strong: rgba(20, 31, 32, .96);
  --surface-topbar: rgba(12, 19, 20, .9);
  --surface-accent: #132528;
  --surface-accent-2: #153134;
  --hero-overlay-a: rgba(20, 31, 32, .96);
  --hero-overlay-b: rgba(22, 38, 39, .93);
  --hero-grid: rgba(121, 213, 207, .06);
  --button-bg: #1a2628;
  --quick-card-bg: rgba(20,31,32,.9);
  --legacy-card-bg: rgba(21, 32, 33, .96);
  --image-panel-bg: #182526;
  --notice-bg: #2b2417;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 5% 10%, var(--bg-radial-a), transparent 28rem),
    radial-gradient(circle at 90% 0%, var(--bg-radial-b), transparent 24rem),
    linear-gradient(135deg, var(--bg-start) 0%, var(--bg-mid) 42%, var(--bg-end) 100%);
  min-height: 100vh;
}

a { color: var(--teal-dark); text-decoration-thickness: .08em; text-underline-offset: .18em; }
html[data-theme="dark"] .portfolio_inner_box { background: rgba(21, 32, 33, .96); }
html[data-theme="dark"] .quick-card, html[data-theme="dark"] .search-results a { background: rgba(20, 31, 32, .9); }
html[data-theme="dark"] .content table, html[data-theme="dark"] .content td, html[data-theme="dark"] .content th { color: var(--ink); }
img { max-width: 100%; height: auto; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .9rem;
  padding: .9rem clamp(1rem, 4vw, 3rem);
  background: var(--surface-topbar);
  border-bottom: 1px solid rgba(23, 33, 31, .12);
  backdrop-filter: blur(18px);
}

.brand { display: inline-flex; align-items: center; gap: .8rem; color: var(--ink); text-decoration: none; }
.brand-mark {
  display: block;
  width: 3rem;
  height: 3rem;
  flex: 0 0 auto;
  border-radius: .95rem;
  box-shadow: 0 12px 30px rgba(0, 140, 135, .20);
}
.brand strong { display: block; letter-spacing: .02em; }
.brand small { display: block; color: var(--muted); font-size: .78rem; margin-top: .08rem; }
.nav-link-solo {
  display: block;
  margin: 0 0 .85rem;
}

.top-actions { display: flex; align-items: center; gap: .85rem; }
.top-actions a, .search-open, .menu-toggle, .theme-toggle {
  border: 1px solid rgba(23, 33, 31, .16);
  border-radius: 999px;
  background: var(--paper-strong);
  color: var(--ink);
  padding: .65rem .95rem;
  font: inherit;
  text-decoration: none;
  cursor: pointer;
}
.menu-toggle { display: none; }
.search-open { background: var(--ink); color: var(--paper-strong); }
.theme-toggle { min-width: 2.75rem; width: 2.75rem; padding-inline: 0; font-size: 0; position: relative; }
.theme-toggle::before { content: "☾"; font-size: 1.1rem; line-height: 1; }
html[data-theme="dark"] .theme-toggle::before { content: "☀"; font-size: 1rem; }

.layout {
  display: grid;
  grid-template-columns: minmax(14rem, 18rem) minmax(0, 1fr);
  gap: clamp(1rem, 3vw, 2rem);
  width: min(1440px, calc(100% - 2rem));
  margin: clamp(1rem, 3vw, 2rem) auto 4rem;
}

.sidebar {
  position: sticky;
  top: 5.5rem;
  align-self: start;
  max-height: calc(100vh - 7rem);
  overflow: auto;
  padding: 1rem;
  background: var(--surface-strong);
  border: 1px solid rgba(23, 33, 31, .1);
  border-radius: 1.6rem;
  box-shadow: var(--shadow);
}
.nav-group { border-bottom: 1px solid var(--line); padding: .65rem 0; }
.nav-group:last-child { border-bottom: 0; }
.nav-group summary { cursor: pointer; font-weight: 800; color: var(--teal-dark); }
.nav-group div { display: grid; gap: .25rem; margin-top: .5rem; }
.nav-link {
  display: block;
  padding: .55rem .65rem;
  border-radius: .8rem;
  color: var(--ink);
  text-decoration: none;
}
.nav-link:hover, .nav-link.is-active { background: var(--surface-accent); color: var(--teal-dark); }

.main { min-width: 0; }
.hero, .page-heading, .quick-search, .content {
  background: var(--surface);
  border: 1px solid rgba(23, 33, 31, .1);
  border-radius: 2rem;
  box-shadow: var(--shadow);
}
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(15rem, 23rem);
  gap: 1.5rem;
  overflow: hidden;
  padding: clamp(1.15rem, 3vw, 2.2rem);
  background:
    linear-gradient(135deg, var(--hero-overlay-a), var(--hero-overlay-b)),
    repeating-linear-gradient(90deg, var(--hero-grid), var(--hero-grid) 1px, transparent 1px, transparent 28px);
}
.home-hero {
  grid-template-columns: minmax(0, 1.05fr) minmax(18rem, .95fr);
  align-items: center;
  gap: clamp(1.25rem, 4vw, 3rem);
}
.eyebrow {
  margin: 0 0 .65rem;
  color: var(--orange);
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
  font-size: .78rem;
}
.hero h1 { margin: 0; font-size: clamp(0.98rem, 1.35vw, 1.22rem); line-height: 1.2; letter-spacing: 0; }
.home-hero h1 {
  font-size: clamp(1.05rem, 1.45vw, 1.38rem);
  white-space: nowrap;
}
.home-hero p { line-height: 1.7; }
.page-heading h1 { margin: 0; font-size: clamp(1.05rem, 1.45vw, 1.38rem); line-height: 1.2; letter-spacing: 0; color: var(--ink); }
.hero-text { color: var(--muted); max-width: 42rem; font-size: 1rem; line-height: 1.6; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.4rem; }
.button {
  display: inline-flex;
  align-items: center;
  border: 1px solid rgba(23, 33, 31, .18);
  border-radius: 999px;
  padding: .8rem 1.05rem;
  color: var(--ink);
  background: var(--button-bg);
  text-decoration: none;
  font-weight: 800;
}
.button.primary { color: white; background: var(--teal); border-color: var(--teal); }
.hero-panel {
  display: grid;
  place-content: center;
  min-height: 12.5rem;
  padding: 1.2rem;
  color: white;
  background: linear-gradient(145deg, var(--teal), #0c3938);
  border-radius: 1.5rem;
  text-align: center;
}
.panel-number { display: block; color: var(--yellow); font-size: clamp(2.2rem, 5vw, 4.1rem); font-weight: 900; line-height: 1; }

.page-heading { padding: clamp(1.4rem, 4vw, 2.4rem); }
.quick-search { margin-top: 1rem; padding: 1rem; }
.quick-search label { display: block; margin-bottom: .55rem; font-weight: 800; }
.quick-search input, .search-dialog input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--paper-strong);
  color: var(--ink);
  font: inherit;
  padding: .9rem 1rem;
}
.quick-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(12rem, 1fr));
  gap: .75rem;
  margin-top: .85rem;
}
.quick-card {
  display: grid;
  gap: .25rem;
  padding: .85rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--quick-card-bg);
  color: var(--ink);
  text-decoration: none;
}
.quick-card span { color: var(--muted); font-size: .78rem; }
.quick-card strong { line-height: 1.2; }
.quick-card:hover, .quick-card.is-current { border-color: var(--teal); background: var(--surface-accent-2); transform: translateY(-1px); }

.content {
  margin-top: 1rem;
  padding: clamp(1rem, 3vw, 2rem);
  overflow: hidden;
}
.content h2, .content h3, .content h4 { color: var(--ink); letter-spacing: -.02em; }
.content h3:first-child { margin-top: 0; font-size: clamp(1.05rem, 1.65vw, 1.35rem); }
.content p { line-height: 1.75; }
.content table { width: 100%; border-collapse: collapse; overflow: auto; display: block; }
.content td, .content th { border: 1px solid var(--line); padding: .55rem; }
.home-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(18rem, .95fr);
  align-items: center;
  gap: clamp(1.25rem, 4vw, 3rem);
  width: 100%;
}
.home-intro-text { min-width: 0; }
.home-intro-text h3 { margin-top: 0; }
.home-intro-image {
  display: block;
  width: 100%;
  max-height: 32rem;
  object-fit: cover;
  border-radius: 1rem;
  box-shadow: 0 18px 50px rgba(23, 33, 31, .16);
}
.one_half {
  display: inline-block;
  width: min(100%, 31rem);
  vertical-align: top;
  margin: 0 1.5rem 1rem 0;
}
.fullwidth { width: 100%; border-radius: 1rem; }
.portfolio_container, .entry { display: contents; }
.portfolio, .portfolio_inner, .portfolio_inner_box { display: contents; }
.legacy-content figure { margin: 0; }
.legacy-content .entry {
  display: inline-block;
  width: min(100%, 11rem);
  vertical-align: top;
  margin: 0 .9rem .9rem 0;
}
.portfolio_inner_box {
  display: block;
  height: 100%;
  padding: .5rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--legacy-card-bg);
}
.portfolio_inner_box img {
  width: 100%;
  max-height: 9.5rem;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  object-position: center;
  border-radius: .8rem;
  background: var(--image-panel-bg);
}
.entry-title { margin: .5rem 0 .25rem; font-size: .9rem; line-height: 1.3; }
.hover_effect { display: none; }
.post_category a {
  display: inline-flex;
  margin-top: .45rem;
  font-size: .85rem;
  font-weight: 800;
}
.notice-card {
  padding: 1.2rem;
  border: 1px dashed var(--orange);
  border-radius: 1rem;
  background: var(--notice-bg);
}
.notice-card p:first-child { margin-top: 0; }
.file-links p { margin: 1rem 0 .55rem; }
.file-links ul { list-style: none; padding: 0; margin: 0; display: grid; gap: .55rem; }
.file-links li { margin: 0; }
.file-row { display: grid; grid-template-columns: minmax(18rem, 32ch) minmax(0, 1fr); align-items: start; column-gap: 1.25rem; }
.file-note { color: var(--muted); font-size: .92rem; line-height: 1.45; min-width: 0; }
.file-link { color: var(--teal); text-decoration: none; font-weight: 700; border-bottom: 1px solid transparent; transition: color .18s ease, border-color .18s ease, padding-left .18s ease; }
.file-link:hover { color: var(--ink); border-color: var(--orange); padding-left: .2rem; }

.search-dialog {
  width: min(780px, calc(100% - 2rem));
  border: 0;
  border-radius: 1.5rem;
  padding: 1.5rem;
  box-shadow: var(--shadow);
}
.search-dialog::backdrop { background: rgba(23, 33, 31, .45); backdrop-filter: blur(5px); }
.dialog-close { float: right; border: 0; background: transparent; font-size: 2rem; cursor: pointer; }
.search-results { display: grid; gap: .6rem; margin-top: 1rem; }
.search-results a { display: block; padding: .8rem; border: 1px solid var(--line); border-radius: .9rem; text-decoration: none; }
.search-results span { display: block; color: var(--muted); font-size: .82rem; }

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  width: min(1440px, calc(100% - 2rem));
  margin: 0 auto 2rem;
  color: var(--muted);
  font-size: .9rem;
}

@media (max-width: 720px) {
  .file-row { grid-template-columns: 1fr; row-gap: .25rem; }
}

@media (max-width: 900px) {
  .topbar {
    flex-wrap: wrap;
    align-items: center;
    gap: .65rem;
    padding: .75rem 1rem;
  }
  .brand {
    flex: 1 1 auto;
    min-width: 0;
  }
  .brand span { min-width: 0; }
  .brand strong, .brand small { white-space: normal; }
  .brand-mark {
    width: 2.55rem;
    height: 2.55rem;
    border-radius: .75rem;
  }
  .menu-toggle {
    display: inline-flex;
    margin-left: auto;
    padding: .55rem .8rem;
  }
  .top-actions {
    width: 100%;
    justify-content: flex-end;
    gap: .55rem;
  }
  .top-actions a { display: none; }
  .search-open, .theme-toggle {
    padding: .55rem .8rem;
    font-size: .92rem;
  }
  .layout { display: block; }
  .sidebar { display: none; position: static; margin-bottom: 1rem; max-height: none; }
  body.nav-open .sidebar { display: block; }
  .hero { grid-template-columns: 1fr; }
  .home-intro { grid-template-columns: 1fr; }
  .home-hero h1 { white-space: normal; }
}

@media (prefers-reduced-motion: no-preference) {
  .hero, .page-heading, .quick-search, .content, .sidebar { animation: rise .45s ease both; }
  @keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
}