:root {
  --bg: #0f1115;
  --surface: #1a1d23;
  --border: #2a2f38;

  --text: #e4e6eb;
  --muted: #9aa0a6;

  --accent: #5b8cff;
  --hover: #23272f;

  --code-bg: #0d1117;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 40px 20px;
  max-width: 760px;
  margin-inline: auto;

  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);

  padding-left: max(20px, env(safe-area-inset-left));
  padding-right: max(20px, env(safe-area-inset-right));
}

h1, h2, h3 {
  color: #ffffff;
}

h1 {
  font-size: 30px;
  margin-bottom: 10px;
  font-weight: 600;
}

h2 {
  margin-top: 40px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
  font-size: 20px;
  font-weight: 600;
}

h3 {
  font-size: 17px;
  font-weight: 500;
}

h1, h2 {
  word-break: keep-all;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  opacity: 0.85;
}

#categories {
  margin: 15px 0 25px;
}

.category {
  display: inline-flex;
  align-items: center;

  padding: 6px 12px;
  margin-right: 8px;

  font-size: 13px;
  color: var(--muted);

  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;

  cursor: pointer;
  transition: all 0.2s ease;
}

.category:hover {
  background: var(--hover);
  color: var(--text);
}

.category.active {
  background: transparent;
  color: var(--text);
  border-color: var(--accent);
}

.post {
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

.post h3 {
  margin: 0;
  line-height: 1.4;
}

.post-meta {
  margin-top: 5px;
  font-size: 12px;
  color: var(--muted);
}

.content {
  margin-top: 30px;
  font-size: 15.5px;
  line-height: 1.75;
  word-break: break-word;
}

.content h1 {
  font-size: 26px;
  margin-top: 28px;
}

.content h2 {
  font-size: 20px;
  margin-top: 26px;
}

.content h3 {
  font-size: 17px;
  margin-top: 22px;
}

.content p {
  margin: 14px 0;
  color: #d6d8dd;
}

.content ul,
.content ol {
  padding-left: 20px;
  margin: 12px 0;
}

.content li {
  margin: 6px 0;
}

.content strong {
  color: #ffffff;
  font-weight: 600;
}

.content em {
  color: #c0c4cc;
}

.content img {
  max-width: 100%;
  border-radius: 6px;
  margin: 16px 0;
}

/* ✅ 코드 블록 (핵심) */
.content pre {
  background: var(--code-bg);
  border: 1px solid #30363d;
  padding: 14px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 16px 0;
  line-height: 1.6;
}

/* ❗ 줄 쪼개짐 해결 핵심 */
.content pre code {
  background: transparent;
  padding: 0;
  border: none;
  display: block;
  white-space: pre;
  font-size: 13px;
  color: #c9d1d9;
}

/* inline code만 따로 */
.content :not(pre) > code {
  background: #1f242d;
  color: #c9d1d9;
  padding: 3px 6px;
  border-radius: 4px;
  font-size: 13px;
}

.content blockquote {
  margin: 16px 0;
  padding: 10px 14px;
  border-left: 3px solid var(--accent);
  background: #141820;
  color: #b8bcc5;
}

.content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 30px 0;
}

a.back {
  display: inline-block;
  margin-top: 40px;
  color: var(--muted);
}

a.back:hover {
  color: var(--text);
}

@media (max-width: 640px) {
  body {
    padding: 20px 14px;
    max-width: 100%;

    padding-left: max(14px, env(safe-area-inset-left));
    padding-right: max(14px, env(safe-area-inset-right));
  }

  h1 { font-size: 24px; }
  h2 { font-size: 18px; }

  #categories {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
  }

  .category {
    margin-right: 0;
    font-size: 12px;
    padding: 5px 10px;
  }

  .post h3 { font-size: 16px; }
  .post-meta { font-size: 11px; }

  .content {
    font-size: 14.5px;
    line-height: 1.7;
  }

  .content pre {
    font-size: 12px;
    padding: 10px;
  }

  .content code {
    font-size: 12px;
  }
}