:root {
  --bg-1: #ffffff;
  --bg-2: #f3f3f3;
  --ink: #0a0a0a;
  --sub: #2f2f2f;
  --card: #ffffff;
  --line: #0a0a0a;
  --accent: #0a0a0a;
  --accent-2: #0a0a0a;
  --shadow: 0 0 0 rgba(0, 0, 0, 0);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(to right, rgba(0, 0, 0, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 0, 0, 0.05) 1px, transparent 1px),
    var(--bg-1);
  background-size: 24px 24px, 24px 24px, auto;
  font-family: "IBM Plex Sans JP", "Noto Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;
  line-height: 1.75;
}

.bg-grid {
  display: none;
}

.site-header,
.site-main,
.site-footer {
  width: min(980px, calc(100vw - 2rem));
  margin: 0 auto;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1.1rem 0;
  border-bottom: 2px solid var(--line);
}

.brand {
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.site-nav a {
  text-decoration: none;
  color: var(--ink);
  padding: 0.25rem 0.8rem;
  font-size: 0.95rem;
  border-right: 1px solid rgba(10, 10, 10, 0.25);
  position: relative;
  transition: color 0.18s ease;
}

.site-nav a:first-child {
  border-left: 1px solid rgba(10, 10, 10, 0.25);
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0.8rem;
  right: 0.8rem;
  bottom: -2px;
  height: 1px;
  background: var(--ink);
  transform: scaleX(0);
  transition: transform 0.2s ease;
  transform-origin: left;
}

.site-nav a:hover::after,
.site-nav a.active::after {
  transform: scaleX(1);
}

.site-nav a.active {
  font-weight: 600;
}

.site-main {
  display: grid;
  gap: 1.2rem;
  padding: 1.2rem 0 2rem;
}

.home-minimal {
  min-height: calc(100vh - 190px);
  display: grid;
  align-content: center;
  gap: 0.65rem;
  max-width: 760px;
}

.home-tag {
  margin: 0;
  color: var(--ink);
  text-transform: uppercase;
  letter-spacing: 0.24em;
  font-size: 0.76rem;
  font-weight: 600;
}

.home-minimal h1 {
  margin: 0;
  font-size: clamp(2rem, 4.8vw, 3.6rem);
  line-height: 1.1;
  letter-spacing: 0.01em;
}

.home-copy {
  margin: 0;
  color: var(--sub);
  white-space: normal;
}

.home-links {
  margin: 0.3rem 0 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.55rem;
  font-size: 0.98rem;
}

.home-links a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 38, 32, 0.35);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.home-links a:hover {
  color: var(--accent-2);
  border-color: var(--accent-2);
}

.home-links span {
  color: rgba(31, 38, 32, 0.45);
}

.hero,
.panel {
  background: var(--card);
  border: none;
  border-left: 2px solid var(--line);
  border-radius: 0;
  box-shadow: none;
  padding: 1.3rem 1.5rem;
}

.hero h1,
.panel h1,
.panel h2 {
  margin: 0.2rem 0 0.8rem;
  line-height: 1.3;
}

.kicker {
  margin: 0;
  color: var(--ink);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.8rem;
  font-weight: 600;
}

.subtitle,
.hero-copy {
  color: var(--sub);
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.btn {
  display: inline-block;
  text-decoration: none;
  border-radius: 0;
  padding: 0.55rem 0.95rem;
  font-weight: 700;
}

.btn.solid {
  color: #fff;
  background: #0a0a0a;
  border: 1px solid #0a0a0a;
}

.btn.outline {
  color: #0a0a0a;
  border: 1px solid #0a0a0a;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 0.8rem;
}

.cards-compact {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.65rem;
}

.card {
  background: transparent;
  border-radius: 0;
  border: none;
  border-left: 2px solid rgba(10, 10, 10, 0.2);
  padding: 0.8rem 1rem;
}

.card h2,
.card h3 {
  margin-top: 0;
  margin-bottom: 0.35rem;
}

.card a {
  color: var(--ink);
}

.list {
  margin: 0;
  padding-left: 1.15rem;
}

.content a {
  color: var(--ink);
  text-decoration-thickness: 1px;
}

.site-footer {
  color: var(--sub);
  font-size: 0.92rem;
  padding-bottom: 2rem;
  border-top: 1px solid var(--line);
}

.fade-in {
  animation: fadeInUp 0.55s ease both;
}

.stagger .card {
  animation: fadeInUp 0.6s ease both;
}

.stagger .card:nth-child(2) { animation-delay: 0.05s; }
.stagger .card:nth-child(3) { animation-delay: 0.1s; }
.stagger .card:nth-child(4) { animation-delay: 0.15s; }
.stagger .card:nth-child(5) { animation-delay: 0.2s; }

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.search-bar {
  margin-bottom: 0.8rem;
}

.search-bar input {
  width: 100%;
  padding: 0.55rem 0.8rem;
  border: 1px solid var(--line);
  border-radius: 0;
  font: inherit;
  font-size: 1rem;
  background: #fff;
  color: var(--ink);
}

.blog-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1rem;
  align-items: center;
}

.blog-toolbar input[type="text"] {
  flex: 1 1 180px;
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 0;
  font: inherit;
  background: #fff;
  color: var(--ink);
}

.blog-date-filter {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.blog-date-filter input[type="date"] {
  padding: 0.4rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 0;
  font: inherit;
  background: #fff;
  color: var(--ink);
}

.blog-date-filter button {
  padding: 0.4rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 0;
  background: #fff;
  color: var(--ink);
  font: inherit;
  cursor: pointer;
}

.blog-date-filter button:hover {
  background: var(--ink);
  color: #fff;
}

.blog-list {
  display: grid;
  gap: 0.6rem;
}

.blog-card {
  border: none;
  border-left: 2px solid rgba(10, 10, 10, 0.2);
  padding: 1rem 1.2rem;
  background: transparent;
}

.blog-card + .blog-card {
  margin-top: 0;
}

.blog-card h2 {
  margin: 0.2rem 0 0.5rem;
  font-size: 1.05rem;
  line-height: 1.4;
}

.blog-card h2 a {
  color: var(--ink);
  text-decoration: none;
}

.blog-card h2 a:hover {
  text-decoration: underline;
}

.blog-card-meta {
  font-size: 0.82rem;
  color: var(--sub);
  margin-bottom: 0.2rem;
}

.blog-card-summary {
  margin: 0 0 0.6rem;
  color: var(--sub);
  font-size: 0.93rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-read-more {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  margin-top: 0.2rem;
}

.blog-read-more:hover {
  border-color: var(--ink);
}

.blog-empty {
  color: var(--sub);
  margin-top: 1rem;
}

.hidden {
  display: none !important;
}

.reactions-wrap {
  margin-top: 0.8rem;
}

.reactions-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.reaction-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
  padding: 0.35em 0.75em;
  border: 1px solid var(--line);
  background: #fff;
  cursor: pointer;
  font: inherit;
  font-size: 1rem;
  transition: background 0.15s, color 0.15s, transform 0.1s;
}

.reaction-btn:hover {
  background: var(--ink);
  color: #fff;
}

.reaction-btn.reacted {
  transform: scale(1.18);
}

.reaction-btn.voted,
.reaction-btn:disabled {
  background: #e8e8e8;
  color: #888;
  border-color: #ccc;
  cursor: not-allowed;
}

.reaction-btn.voted:hover,
.reaction-btn:disabled:hover {
  background: #e8e8e8;
  color: #888;
}

.reaction-emoji {
  font-size: 1.1em;
  line-height: 1;
}

.reaction-count {
  font-size: 0.85em;
  font-weight: 600;
  min-width: 1ch;
}

.link-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
  text-decoration: none;
  border: 1px solid var(--line);
  padding: 0.2em 0.55em;
  font-size: 0.92rem;
  color: var(--ink);
  background: #fff;
  transition: background 0.15s, color 0.15s;
  vertical-align: middle;
}

.link-badge:hover {
  background: var(--ink);
  color: #fff;
}

.link-badge-icon {
  font-style: normal;
  font-size: 0.85em;
}

.link-badge-service {
  font-weight: 700;
  letter-spacing: 0.02em;
}

.link-badge-label {
  color: inherit;
  opacity: 0.75;
  font-size: 0.88em;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2rem;
  height: 2rem;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  height: 1.5px;
  background: var(--ink);
  transition: transform 0.2s ease, opacity 0.2s ease;
  transform-origin: center;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

@media (max-width: 680px) {
  .site-header,
  .site-main,
  .site-footer {
    width: calc(100vw - 2rem);
  }

  .site-header {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    position: relative;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: calc(100% + 2px);
    left: 0;
    right: 0;
    background: var(--bg-1);
    border-bottom: 2px solid var(--line);
    flex-direction: column;
    z-index: 100;
    padding: 0.4rem 0;
  }

  .site-nav.open {
    display: flex;
  }

  .site-nav a {
    border: none;
    padding: 0.6rem 1rem;
    font-size: 0.95rem;
    letter-spacing: 0.04em;
  }

  .site-nav a:first-child {
    border-left: none;
  }

  .site-nav a::after {
    display: none;
  }

  .site-nav a:hover {
    background: rgba(10, 10, 10, 0.05);
  }

  .site-nav a.active {
    font-weight: 600;
    border-left: 2px solid var(--ink);
    padding-left: calc(1rem - 2px);
  }

  .home-minimal {
    min-height: auto;
    align-content: start;
    padding-top: 0.4rem;
  }

  .cards-compact {
    grid-template-columns: 1fr;
  }

  .hero,
  .panel {
    padding: 1rem 1.2rem;
  }
}