@font-face {
  font-family: 'JB-Mono-Subset';
  src: local('JetBrains Mono');
  unicode-range: U+0020-007E; 
}

:root,
[data-theme="dark"] {
  --bg:          #000;
  --bg-nav:      rgba(0, 0, 0, 0.92);
  --bg-input:    #080808;
  --border:      #1c1c1c;
  --text:        #ffffff;
  --text-dim:    #888888;
  --text-mid:    #ffffff;
  --sans: 'JB-Mono-Subset', 'Noto Sans JP', sans-serif;
  --mono: 'JetBrains Mono', monospace;
  color-scheme: dark;
}

[data-theme="light"] {
  --bg:          #fafafa;
  --bg-nav:      rgba(250, 250, 250, 0.92);
  --bg-input:    #f0f0f0;
  --border:      #e0e0e0;
  --text:        #000000;
  --text-dim:    #888888;
  --text-mid:    #000000;
  --sans: 'JB-Mono-Subset', 'Noto Sans JP', sans-serif;
  color-scheme: light;
}

/*TRANSITION*/
body {
  transition: background 0.25s ease, color 0.25s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
}

/*NAV*/
nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  background: var(--bg-nav);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--text-mid);
  letter-spacing: 0.04em;
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 1.8rem;
  list-style: none;
}

.nav-links a {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  text-decoration: none;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text-mid); }

.nav-right {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.nav-search-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 0.55rem;
  font-size: 0.9rem;
  color: var(--text-dim);
  pointer-events: none;
}

.nav-search {
  background: var(--bg-input);
  border: 1px solid var(--border);
  padding: 0.28rem 0.7rem 0.28rem 1.7rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text);
  outline: none;
  width: 180px;
  transition: border-color 0.2s, width 0.3s;
}
.nav-search:focus { border-color: var(--text-dim); width: 230px; }
.nav-search::placeholder { color: var(--text-dim); }

/*SHARED BUTTON BASE*/
.nav-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  padding: 0.22rem 0.55rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  transition: border-color 0.2s, color 0.2s;
  white-space: nowrap;
}
.nav-btn:hover { border-color: var(--text-dim); color: var(--text-mid); }
.btn-active { color: var(--text); }
.btn-sep { color: var(--border); }

/*THEME TOGGLE ICON*/
.theme-icon { font-size: 0.75rem; line-height: 1; }

/*HERO*/
header {
  max-width: 760px;
  margin: 0 auto;
  padding: 5rem 2rem 3.5rem;
}

.hero-label {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--text-dim);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 1.4rem;
}

.hero-title {
  font-family: var(--mono);
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--text);
  margin-bottom: 1.2rem;
}

.hero-desc {
  font-size: 0.9rem;
  color: var(--text-mid);
  max-width: 480px;
  line-height: 1.9;
}

.hero-stat {
  margin-top: 2.2rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-dim);
}

.hero-stat-num {
  color: var(--text-mid);
  font-size: 1.1rem;
  margin-right: 0.3rem;
}

/*POSTS*/
main {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 2rem 5rem;
}

.section-label {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 1.5rem;
}

.posts-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border);
}

.post-row {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 1.2rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--border);
  align-items: center;
}
.post-row:hover .post-row-title { color: var(--text); }

.post-row-date {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--text-dim);
  white-space: nowrap;
}

.post-row-body {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  justify-content: space-between;
}

.post-row-title {
  font-size: 0.88rem;
  color: var(--text-mid);
  line-height: 1.5;
  transition: color 0.2s;
  text-decoration: none;
  cursor: pointer;
}
.post-row-title:hover { color: var(--text); }

.post-row-tag {
  font-family: var(--mono);
  font-size: 0.6rem;
  color: var(--text-dim);
  letter-spacing: 0.08em;
  white-space: nowrap;
  text-decoration: none;
  position: relative;
  z-index: 1;
  flex-shrink: 0;
}
.post-row-tag:hover { color: var(--text-mid); }

.no-results {
  padding: 2.5rem 0;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

/*ABOUT*/
aside {
  max-width: 760px;
  margin: 0 auto;
  padding: 3rem 2rem 5rem;
  border-top: 1px solid var(--border);
}

.about-wrap {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}

.about-name {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-mid);
  margin-bottom: 0.3rem;
}

.about-role {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--text-dim);
  margin-bottom: 0.7rem;
}

.about-bio {
  font-size: 0.82rem;
  color: var(--text-dim);
  line-height: 1.85;
  max-width: 500px;
}



/*FOOTER*/
footer {
  max-width: 760px;
  margin: 0 auto;
  padding: 1.5rem 2rem 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--text-dim);
  border-top: 1px solid var(--border);
}

.footer-links { display: flex; gap: 1.2rem; }
.footer-links a { color: var(--text-dim); text-decoration: none; transition: color 0.2s; }
.footer-links a:hover { color: var(--text-mid); }

/*TAG COLORS*/
[data-theme="dark"] .tag-Trip { color: #4bd5ff; }
[data-theme="light"] .tag-Trip { color: #4bd5ff; }

[data-theme="dark"] .tag-Opinion { color: #f80794; }
[data-theme="light"] .tag-Opinion { color: #f80794; }

[data-theme="dark"] .tag-XREA { color: #ab8dff; }
[data-theme="light"] .tag-XREA { color: #ab8dff; }


/* ── RESPONSIVE ── */
@media (max-width: 640px) {
  nav { padding: 0 1rem; }
  .nav-links { display: none; }
  header, main, aside, footer { padding-left: 1rem; padding-right: 1rem; }
  .post-row { grid-template-columns: 64px 1fr; }
  footer { flex-direction: column; gap: 0.8rem; }
}


.t-bold   { font-weight: 600; color: var(--text); }
.t-italic { font-style: italic; }
.t-del    { text-decoration: line-through; color: var(--text-dim); }
.t-u      { text-decoration: underline; text-underline-offset: 3px; }
.t-upper  { text-transform: uppercase; letter-spacing: 0.08em; }
.t-lower  { text-transform: lowercase; }
.t-small  { font-size: 0.78em; color: var(--text-dim); }

.t-mark {
  background: #7a9a6a33;
  padding: 0.05em 0.25em;
  border-radius: 2px;
}
[data-theme="light"] .t-mark { background: #4a7a3a33; }

.t-kbd {
  font-family: var(--mono);
  font-size: 0.72em;
  color: var(--text-mid);
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  padding: 0.1em 0.45em;
  border-radius: 3px;
  white-space: nowrap;
}

/* 色 */
[data-theme="dark"]  .t-Trip     { color: #4bd5ff; }
[data-theme="light"] .t-Trip     { color: #4bd5ff; }

[data-theme="dark"]  .t-Opinion     { color: #f80794; }
[data-theme="light"] .t-Opinion     { color: #f80794; }

[data-theme="dark"]  .t-XREA     { color: #ab8dff; }
[data-theme="light"] .t-XREA     { color: #ab8dff; }