:root {
  color-scheme: light;
  --bg: #f7f7f5;
  --text: #1f1f1f;
  --muted: #6b6b6b;
  --card: #ffffff;
  --border: #e3e3df;
  --accent: #2f6f6a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container {
  width: min(980px, 92vw);
  margin: 0 auto;
}

header {
  border-bottom: 1px solid var(--border);
  background: #fbfbfa;
}

header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 0;
  gap: 1rem;
}

header h1 {
  font-size: 1.5rem;
  margin: 0;
  letter-spacing: 0.3px;
}

nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

nav a {
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
}

nav a.active {
  color: var(--accent);
}

main {
  padding: 2rem 0 3rem;
}

.intro {
  margin-bottom: 2rem;
  color: var(--muted);
}

.blog-layout {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(0, 2.2fr);
  gap: 1.5rem;
}

.post-list {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.5rem;
  height: fit-content;
}

.post-list button {
  width: 100%;
  text-align: left;
  border: none;
  background: transparent;
  padding: 0.75rem 0.8rem;
  border-radius: 10px;
  cursor: pointer;
  font-family: inherit;
}

.post-list button:hover,
.post-list button.active {
  background: #f1f3f2;
}

.post-list .meta {
  display: block;
  font-size: 0.75rem;
  color: var(--muted);
}

.post-detail {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
}

.post-detail h2 {
  margin-top: 0;
  font-size: 1.6rem;
}

.post-detail .detail-meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.tag {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.75rem;
  margin-left: 0.5rem;
  color: var(--muted);
}

footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0 2rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
}

form {
  display: grid;
  gap: 1rem;
}

input,
textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-family: inherit;
  font-size: 1rem;
}

button.primary {
  border: none;
  background: var(--accent);
  color: white;
  padding: 0.75rem 1rem;
  border-radius: 10px;
  font-weight: 600;
  cursor: pointer;
  width: fit-content;
}

.map {
  margin-top: 1.5rem;
  border: 0;
  width: 100%;
  height: 260px;
  border-radius: 12px;
}

@media (max-width: 860px) {
  header .container {
    flex-direction: column;
    align-items: flex-start;
  }

  .blog-layout {
    grid-template-columns: 1fr;
  }
}