/* === Vibe Coding 入门宝典 — 全局样式 === */

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background: #f5f2ed;
  color: #2c2c2c;
  font-family: "Noto Serif SC", "Source Han Serif CN", "STSong", "SimSun", Georgia, serif;
  line-height: 1.9;
  font-size: 18px;
  -webkit-font-smoothing: antialiased;
}

/* Container */
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 80px 32px 120px;
}

/* Chapter header */
.chapter-meta {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 13px;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

h1 {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 4px;
  margin-bottom: 12px;
  color: #1a1a1a;
}

.subtitle {
  font-size: 16px;
  color: #8a8a8a;
  font-weight: 400;
  letter-spacing: 2px;
  margin-bottom: 32px;
}

.title-divider {
  width: 60px;
  height: 2px;
  margin-bottom: 48px;
  background: #98a8b8; /* fallback, overridable via inline style */
}

/* Section headings */
h2 {
  font-size: 24px;
  font-weight: 600;
  margin-top: 56px;
  margin-bottom: 20px;
  color: #3a3a3a;
  letter-spacing: 2px;
  padding-bottom: 8px;
  border-bottom: 1px solid #e0d8d0;
}

h2:first-of-type {
  margin-top: 0;
}

h3 {
  font-size: 20px;
  font-weight: 600;
  margin-top: 36px;
  margin-bottom: 14px;
  color: #3a3a3a;
  letter-spacing: 1px;
}

h4 {
  font-size: 17px;
  font-weight: 600;
  margin-top: 24px;
  margin-bottom: 10px;
  color: #4a4a4a;
}

/* Body text */
p {
  margin-bottom: 20px;
  text-indent: 2em;
}

h2 + p, h3 + p, h4 + p,
.section-intro, .section-meta + p {
  text-indent: 0;
}

/* Section meta (update timestamp etc.) */
.section-meta {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 13px;
  color: #8a8a8a;
  margin-bottom: 24px;
  line-height: 1.6;
  letter-spacing: 1px;
}

/* Highlighted inline */
strong {
  font-weight: 700;
}

code {
  background: #ede8e1;
  padding: 2px 6px;
  border-radius: 4px;
  font-family: "Cascadia Code", "Fira Code", "Consolas", monospace;
  font-size: 14px;
}

pre {
  background: #ede8e1;
  border-radius: 8px;
  padding: 20px 24px;
  overflow-x: auto;
  margin: 20px 0 24px;
  font-size: 14px;
  line-height: 1.6;
}

pre code {
  background: none;
  padding: 0;
  font-family: "Cascadia Code", "Fira Code", "Consolas", monospace;
}

/* Blockquote */
blockquote {
  border-left: 3px solid #d0c8bc;
  margin: 24px 0;
  padding: 14px 24px;
  background: #faf8f5;
  color: #4a4a4a;
  border-radius: 0 8px 8px 0;
}

blockquote p {
  text-indent: 0;
  margin-bottom: 8px;
}

blockquote p:last-child {
  margin-bottom: 0;
}

/* Lists */
ul, ol {
  margin: 16px 0 20px;
  padding-left: 0;
  list-style: none;
}

li {
  padding: 6px 0 6px 24px;
  position: relative;
  line-height: 1.7;
}

ul > li::before {
  content: '•';
  position: absolute;
  left: 4px;
  color: #8a7a6a;
  font-weight: bold;
}

ol {
  counter-reset: ol-counter;
}

ol > li {
  counter-increment: ol-counter;
  padding-left: 32px;
}

ol > li::before {
  content: counter(ol-counter) '.';
  position: absolute;
  left: 4px;
  color: #8a7a6a;
  font-weight: 600;
  font-size: 14px;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  background: #faf8f5;
  border-radius: 10px;
  overflow: hidden;
}

th, td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid #e5ddd4;
}

th {
  background: #e8e4da;
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 13px;
  font-weight: 600;
  color: #5a6a7a;
  letter-spacing: 1px;
}

tr:last-child td {
  border-bottom: none;
}

td:first-child {
  font-weight: 600;
  color: #4a5a6a;
}

td:last-child {
  font-size: 15px;
  color: #666;
}

/* Image placeholder */
.img-placeholder {
  margin: 36px auto 28px;
  max-width: 520px;
  border: 1px dashed #d0c8bc;
  border-radius: 12px;
  padding: 40px 24px;
  text-align: center;
  background: #faf8f5;
}

.img-icon {
  font-size: 36px;
  margin-bottom: 8px;
}

.img-label {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 13px;
  letter-spacing: 1px;
}

.img-caption {
  text-align: center;
  font-size: 14px;
  margin: -20px auto 28px;
  max-width: 520px;
  font-style: italic;
  line-height: 1.6;
}

/* Key takeaways */
.takeaways {
  margin: 48px 0 32px;
  padding: 32px 32px 28px;
  background: #ede8e1;
  border-radius: 12px;
}

.takeaways-title {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 13px;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.takeaways ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.takeaways li {
  padding: 10px 0 10px 28px;
  position: relative;
  font-size: 16px;
  line-height: 1.7;
  border-bottom: 1px solid #dcd4ca;
}

.takeaways li:last-child {
  border-bottom: none;
}

.takeaways li::before {
  content: '◆';
  position: absolute;
  left: 0;
  top: 10px;
  font-size: 10px;
}

/* Vibe exercise */
.vibe-section {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 2px solid #e0d8d0;
}

.vibe-label {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 12px;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.vibe-prompt {
  background: #f5f2ed;
  border: 1px solid #e0d8d0;
  border-radius: 8px;
  padding: 24px 28px;
  margin: 16px 0 12px;
  font-style: italic;
  color: #4a4a4a;
  position: relative;
}

.vibe-prompt::before {
  content: '"';
  position: absolute;
  top: 4px;
  left: 12px;
  font-size: 40px;
  font-family: Georgia, serif;
  line-height: 1;
}

.vibe-prompt p {
  text-indent: 0;
  margin-bottom: 0;
  padding-left: 16px;
}

.vibe-prompt p + p {
  margin-top: 12px;
}

.vibe-note {
  font-size: 15px;
  color: #777;
  margin-top: 12px;
  font-style: normal;
}

.vibe-note p {
  text-indent: 0;
  margin-bottom: 0;
}

/* Insight block (common variant) */
.insight-block {
  background: #ede8e1;
  border-left: 3px solid #8a7a6a;
  border-radius: 0 8px 8px 0;
  padding: 20px 24px;
  margin: 24px 0 28px;
}

.insight-block p {
  text-indent: 0;
  margin-bottom: 0;
  font-size: 16px;
  color: #4a4a4a;
}

/* Responsive */
@media (max-width: 600px) {
  .container {
    padding: 48px 20px 80px;
  }
  h1 {
    font-size: 28px;
    letter-spacing: 2px;
  }
  body {
    font-size: 16px;
  }
  h2 {
    font-size: 20px;
  }
  h3 {
    font-size: 18px;
  }
  .takeaways {
    padding: 24px 20px 20px;
  }
  .img-placeholder {
    padding: 28px 16px;
  }
  pre {
    padding: 16px;
    font-size: 13px;
  }
}