*,
html,
body {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Poppins";
}

:root {
  --bg-color: #0f1419;
  --text-color: #ffffff;
  --link-color: #1da1f2;
  --nav-bg: #0f1419;
  --nav-border: #1da1f2;
  --dropdown-bg: #1da1f2;
  --dropdown-shadow: rgba(0, 0, 0, 0.5);
  --footer-bg: #0f1419;
}

.light {
  --bg-color: #ffffff;
  --text-color: #333333;
  --link-color: #007acc;
  --nav-bg: #ffffff;
  --nav-border: #eee;
  --dropdown-bg: #ffffff;
  --dropdown-shadow: rgba(0, 0, 0, 0.2);
  --footer-bg: #f9f9f9;
}

html {
  scroll-behavior: smooth;
}

body {
  line-height: 1.6;
  color: var(--text-color);
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
  background-color: var(--bg-color);
  transition:
    background-color 0.3s,
    color 0.3s;
}

nav {
  position: sticky;
  top: 0;
  background-color: var(--nav-bg);
  border-bottom: 1px solid var(--nav-border);
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

main p {
  margin-bottom: 16px;
}

nav ul {
  list-style-type: none;
  padding: 0;
  margin: 0;
  display: flex;
}

nav li {
  position: relative;
}

nav a {
  display: block;
  padding: 15px 20px;
  color: var(--text-color);
  text-decoration: none;
  font-weight: 500;
}

nav a:hover {
  background-color: rgba(0, 0, 0, 0.1);
}

.dropdown-content {
  display: none;
  position: absolute;
  background-color: var(--dropdown-bg);
  min-width: 200px;
  box-shadow: 0px 8px 16px 0px var(--dropdown-shadow);
  z-index: 1;
}

.dropdown:hover .dropdown-content {
  display: block;
}

.dropdown-content a {
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  color: var(--text-color);
}

.dropdown-content a:hover {
  background-color: rgba(0, 0, 0, 0.1);
}

#theme-toggle {
  background: none;
  border: none;
  color: var(--text-color);
  font-size: 1.2em;
  cursor: pointer;
  padding: 10px;
}

header {
  text-align: center;
  margin-bottom: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
}

.profile-pic {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
}

header h1 {
  font-size: 2.5em;
  margin-bottom: 10px;
}

header p {
  font-size: 1.2em;
  color: var(--text-color);
}

#top {
  margin-top: 10px;
}

main section {
  margin-bottom: 40px;
}

main h2 {
  font-size: 1.8em;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--nav-border);
  padding-bottom: 10px;
}

ul {
  list-style-type: none;
  padding: 0;
}

ul li {
  margin-bottom: 10px;
}

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

a:hover {
  text-decoration: underline;
}

footer {
  text-align: center;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--nav-border);
  color: var(--text-color);
  background-color: var(--footer-bg);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.footer-links {
  font-size: 0.9em;
  margin-bottom: 0;
}

.footer-links .separator {
  margin: 0 8px;
  opacity: 0.5;
}

.footer-copy {
  font-size: 0.85em;
  opacity: 0.6;
  margin-bottom: 0;
}

.blog-post .content a[href^="http"]:not([href*="dimassuryo.com"])::after {
  content: " ↗";
  font-size: 0.85em;
  opacity: 0.6;
}

/* === Blog cards (list page) === */
.blog-cards {
  list-style: none;
  padding: 0;
}

.blog-card {
  border: 1px solid var(--nav-border);
  border-radius: 8px;
  padding: 20px 24px;
  margin-bottom: 20px;
  transition:
    transform 0.2s ease,
    border-color 0.2s ease;
}

.blog-card:hover {
  transform: translateY(-2px);
  border-color: var(--link-color);
}

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

.blog-card a:hover {
  text-decoration: none;
}

.blog-card h2 {
  font-size: 1.3em;
  margin-bottom: 6px;
  color: var(--link-color);
  border-bottom: none;
  padding-bottom: 0;
}

.blog-card .date {
  font-size: 0.85em;
  opacity: 0.65;
  margin-bottom: 12px;
}

.blog-card .summary {
  font-size: 0.95em;
  opacity: 0.9;
}

/* === Single blog post — typography for reading === */
.blog-post {
  max-width: 680px;
  margin: 0 auto;
}

.blog-post header {
  margin-top: 60px;
  margin-bottom: 50px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--nav-border);
  text-align: left;
  display: block;
}

.blog-post header h1 {
  font-size: 2.2em;
  line-height: 1.3;
  margin-bottom: 12px;
  text-align: left;
}

.blog-post .post-meta {
  font-size: 0.9em;
  opacity: 0.7;
  margin-bottom: 0;
}

.blog-post .post-meta .separator {
  margin: 0 8px;
}

/* === Content typography === */
.blog-post .content {
  font-size: 1.08em;
  line-height: 1.85;
}

.blog-post .content p {
  margin-bottom: 24px;
}

/* === Heading in content (ACT dividers) === */
.blog-post .content h2 {
  font-size: 1.3em;
  margin-top: 70px;
  margin-bottom: 24px;
  padding-top: 30px;
  border-top: 1px solid var(--nav-border);
  border-bottom: none;
  padding-bottom: 0;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--link-color);
}

.blog-post .content h3 {
  font-size: 1.15em;
  margin-top: 32px;
  margin-bottom: 14px;
}

/* === lists in content === */
.blog-post .content ul,
.blog-post .content ol {
  padding-left: 30px;
  margin-bottom: 24px;
}

.blog-post .content ul li {
  list-style: disc;
  margin-bottom: 8px;
}

.blog-post .content ol li {
  list-style: decimal;
  margin-bottom: 8px;
}

/* === Pull quote (blockquote) === */
.blog-post .content blockquote {
  font-size: 1.2em;
  font-style: italic;
  text-align: center;
  border-left: none;
  border-top: 1px solid var(--nav-border);
  border-bottom: 1px solid var(--nav-border);
  padding: 36px 24px;
  margin: 56px 0;
  line-height: 1.6;
  color: var(--link-color);
  opacity: 1;
}

.blog-post .content blockquote p {
  margin-bottom: 0;
}

/* === Code === */
.blog-post .content code {
  background-color: rgba(255, 255, 255, 0.08);
  padding: 2px 6px;
  border-radius: 3px;
  font-family: "Courier New", monospace;
  font-size: 0.9em;
}

.light .blog-post .content code {
  background-color: rgba(0, 0, 0, 0.06);
}

.blog-post .content pre {
  background-color: rgba(255, 255, 255, 0.05);
  padding: 18px 22px;
  border-radius: 6px;
  overflow-x: auto;
  margin: 28px 0;
  font-size: 0.9em;
  line-height: 1.5;
}

.light .blog-post .content pre {
  background-color: rgba(0, 0, 0, 0.04);
}

.blog-post .content pre code {
  background: none;
  padding: 0;
}

/* === Images === */
.blog-post .content img {
  max-width: 100%;
  height: auto;
  margin: 36px auto;
  display: block;
  border-radius: 4px;
}

/* Caption from title attribute with pseudo-element */
.blog-post .content img[title] {
  margin-bottom: 8px;
}

.blog-post .content img[title]::after {
  content: attr(title);
  display: block;
  text-align: center;
  font-size: 0.85em;
  font-style: italic;
  opacity: 0.7;
  margin-top: 8px;
}

/* === Italic (emphasis) === */
.blog-post .content em {
  font-style: italic;
}

/* === Post navigation (prev/next) === */
.post-nav {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin: 80px 0 40px;
  padding: 28px 0;
  border-top: 1px solid var(--nav-border);
  border-bottom: 1px solid var(--nav-border);
}

.post-nav a {
  flex: 1;
  text-decoration: none;
  color: var(--text-color);
  display: flex;
  flex-direction: column;
  max-width: 48%;
}

.post-nav a:hover {
  text-decoration: none;
}

.post-nav a:hover .nav-title {
  color: var(--link-color);
}

.post-nav .next-post {
  text-align: right;
  margin-left: auto;
}

.post-nav .nav-label {
  font-size: 0.8em;
  opacity: 0.65;
  margin-bottom: 4px;
}

.post-nav .nav-title {
  font-size: 0.95em;
  font-weight: 500;
  transition: color 0.2s ease;
}

/* === Post footer === */
.post-footer {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--nav-border);
  text-align: center;
}

.post-footer a {
  font-size: 0.95em;
}

.blog-intro {
  font-size: 1em;
  opacity: 0.75;
  margin-bottom: 36px;
  max-width: 600px;
  font-style: italic;
}

/* === Mobile responsive === */

@media (max-width: 768px) {
  body {
    padding: 14px;
  }

  /* Navbar: stack horizontal items tighter */
  nav {
    flex-wrap: wrap;
  }

  nav ul {
    flex-wrap: wrap;
    justify-content: flex-start;
  }

  nav a {
    padding: 12px 14px;
    font-size: 0.92em;
  }

  /* Header: stack profile pic on the text */
  header {
    flex-direction: column;
    gap: 14px;
    text-align: center;
    margin-bottom: 30px;
  }

  .profile-pic {
    width: 90px;
    height: 90px;
  }

  header h1 {
    font-size: 1.9em;
    margin-bottom: 6px;
  }

  header p {
    font-size: 1em;
  }

  /* Main section headings smaller */
  main h2 {
    font-size: 1.5em;
    margin-bottom: 16px;
  }

  /* Blog post page typography */
  .blog-post header {
    margin-top: 30px;
    margin-bottom: 30px;
  }

  .blog-post header h1 {
    font-size: 1.65em;
    line-height: 1.3;
  }

  .blog-post .content {
    font-size: 1em;
    line-height: 1.75;
  }

  .blog-post .content h2 {
    font-size: 1.15em;
    margin-top: 50px;
    padding-top: 24px;
  }

  .blog-post .content blockquote {
    font-size: 1.05em;
    padding: 24px 16px;
    margin: 36px 0;
  }

  /* Code blocks scrollable in mobile */
  .blog-post .content pre {
    font-size: 0.8em;
    padding: 14px 16px;
  }

  /* Cards in vertical layout in mobile */
  .blog-card {
    padding: 18px 18px;
  }

  /* Post nav stack vertical mobile */
  .post-nav {
    flex-direction: column;
    gap: 20px;
  }

  .post-nav a,
  .post-nav .next-post {
    max-width: 100%;
    text-align: left;
    margin-left: 0;
  }
}

/* Extra tight viewport */
@media (max-width: 380px) {
  nav a {
    padding: 10px 10px;
    font-size: 0.85em;
  }

  header h1 {
    font-size: 1.7em;
  }

  .blog-post header h1 {
    font-size: 1.5em;
  }
}

/* === Projects: external mark + writeup CTA === */
.ext-mark {
  font-size: 0.8em;
  opacity: 0.7;
}

.project-cta {
  margin-top: 16px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.project-cta a {
  display: inline-block;
  padding: 9px 18px;
  border-radius: 8px;
  text-decoration: none;
  font-size: 0.9em;
  font-weight: 500;
  transition:
    transform 0.15s ease,
    opacity 0.15s ease;
}

.project-cta a:hover {
  transform: translateY(-1px);
  text-decoration: none;
}

.project-cta .cta-primary {
  background-color: var(--link-color);
  color: #fff;
}

.project-cta .cta-secondary {
  border: 1px solid var(--nav-border);
  color: var(--text-color);
}

.project-cta .cta-secondary:hover {
  border-color: var(--link-color);
}