@import url("https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500&family=Newsreader:opsz,wght@6..72,400;6..72,500;6..72,600&family=Space+Grotesk:wght@400;500;600;700&display=swap");

:root {
  --blog-bg: #f5f5f0;
  --blog-surface: #ffffff;
  --blog-text: #1a1a2e;
  --blog-text-secondary: #6b7280;
  --blog-accent: #059669;
  --blog-accent-hover: #047857;
  --blog-border: #e5e5dc;
  --blog-code-bg: #1e1e2e;
  --blog-code-surface: #282840;
  --blog-code-text: #cdd6f4;
  --blog-code-keyword: #cba6f7;
  --blog-code-string: #a6e3a1;
  --blog-code-comment: #6c7086;
  --blog-code-function: #f9e2af;
  --blog-code-number: #fab387;
  --blog-tag-bg: #eef2e6;
  --blog-tag-text: #4a6741;
  --blog-shadow: rgba(0, 0, 0, 0.06);
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Newsreader", Georgia, "Times New Roman", serif;
  --font-mono: "JetBrains Mono", "Fira Code", monospace;

  --bg: var(--blog-bg);
  --surface: var(--blog-surface);
  --surface-alt: #efefe8;
  --text: var(--blog-text);
  --muted: var(--blog-text-secondary);
  --line: var(--blog-border);
  --accent: var(--blog-accent);
  --accent-soft: #e8f5ef;
  --code-bg: var(--blog-code-bg);
  --code-line: #3a3a57;
  --success: var(--blog-accent);
  --shadow-sm: 0 4px 12px var(--blog-shadow);
  --shadow-md: 0 10px 24px rgba(0, 0, 0, 0.09);
  --radius: 12px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

h1,
h2,
h3,
h4,
h5,
h6,
.logo,
.main-nav a,
.btn,
.badge,
.article-meta,
.eyebrow,
.search-label {
  font-family: var(--font-display);
}

img {
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(245, 245, 240, 0.9);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}

.nav-wrap {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.2px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.main-nav a {
  color: var(--muted);
  font-weight: 600;
  transition: color 0.2s ease, opacity 0.2s ease;
}

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

.main-nav a:focus-visible,
.btn:focus-visible,
.search-input:focus-visible,
.subscribe-form input:focus-visible,
.copy-btn:focus-visible,
.post-thumb-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px;
  background: var(--surface);
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
}

.menu-toggle span + span {
  margin-top: 4px;
}

.hero {
  padding: 80px 0 56px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 28px;
  align-items: center;
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-weight: 700;
}

.hero h1 {
  margin: 10px 0 14px;
  line-height: 1.2;
  font-size: clamp(2rem, 3vw, 3rem);
  max-width: 760px;
}

.subtitle {
  margin: 0 0 26px;
  color: var(--muted);
  max-width: 700px;
}

.hero-card {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  padding: 24px;
}

.hero-card h2 {
  margin-top: 0;
  font-size: 1.1rem;
}

.hero-card ul {
  margin: 8px 0 0;
  padding-left: 22px;
  color: var(--muted);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 10px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  padding: 12px 18px;
  box-shadow: 0 10px 24px rgba(5, 150, 105, 0.24);
}

.btn-primary:hover {
  transform: translateY(-1px);
  background: var(--blog-accent-hover);
}

.btn-secondary {
  background: var(--accent-soft);
  color: var(--blog-accent-hover);
  padding: 10px 14px;
}

.btn-secondary:hover {
  background: #d8eee5;
}

.search-section {
  padding-bottom: 24px;
}

.search-label {
  display: block;
  margin-bottom: 10px;
  font-weight: 600;
}

.search-input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  font-size: 0.98rem;
  padding: 12px 14px;
  background: var(--surface);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-input:focus {
  border-color: #b9dccf;
  box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.12);
  outline: none;
}

.posts-section {
  padding: 28px 0 64px;
}

.section-head h2 {
  margin: 0;
}

.section-head p {
  margin: 10px 0 0;
  color: var(--muted);
}

.post-grid {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.post-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.post-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.post-thumb-link {
  display: block;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.post-thumb {
  width: 100%;
  height: 190px;
  object-fit: cover;
  display: block;
  transition: transform 0.35s ease;
}

.post-card:hover .post-thumb {
  transform: scale(1.03);
}

.post-content {
  padding: 18px 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  flex: 1;
}

.post-meta-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.86rem;
  color: var(--muted);
}

.badge {
  border: 1px solid #d8e7d8;
  border-radius: 999px;
  padding: 4px 10px;
  font-weight: 600;
  color: var(--blog-tag-text);
  background: var(--blog-tag-bg);
}

.post-card h3 {
  margin: 0;
  font-size: 1.2rem;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.post-card p {
  margin: 0;
  color: var(--muted);
  flex: 1;
  font-size: 1rem;
}

.post-meta-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  color: var(--muted);
  font-size: 0.9rem;
}

.about-section {
  padding-bottom: 44px;
}

.about-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 28px;
}

.about-card h2 {
  margin: 0 0 8px;
}

.about-card p {
  margin: 0;
  color: var(--muted);
}

.newsletter {
  padding: 0 0 70px;
}

.newsletter-wrap {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 26px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
}

.newsletter h2 {
  margin: 0;
}

.newsletter p {
  margin: 6px 0 0;
  color: var(--muted);
}

.subscribe-form {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.subscribe-form input {
  width: 270px;
  max-width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 11px 12px;
  font-size: 0.98rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.subscribe-form input:focus {
  border-color: #b9dccf;
  box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.12);
  outline: none;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 22px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  align-items: center;
  gap: 16px;
}

.footer-grid p {
  margin: 0;
  color: var(--muted);
}

.social-links,
.quick-links {
  display: flex;
  gap: 14px;
  justify-content: center;
}

.social-links a,
.quick-links a {
  color: var(--muted);
  font-weight: 500;
}

.social-links a:hover,
.quick-links a:hover {
  color: var(--text);
}

/* Article page styles */
.article-main {
  padding: 36px 0 70px;
}

.article-wrap {
  width: min(900px, 92%);
  margin: 0 auto;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--blog-accent-hover);
  font-weight: 600;
  margin-bottom: 20px;
}

.article-header {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 26px;
  margin-bottom: 24px;
}

.article-header .badge {
  margin-right: 8px;
}

.article-header h1 {
  margin: 14px 0 10px;
  line-height: 1.25;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
}

.article-meta {
  color: var(--muted);
  font-size: 0.92rem;
}

.article-intro {
  margin-top: 14px;
  font-size: 1.05rem;
}

.article-content {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 30px;
}

.article-content h2 {
  margin: 0 0 10px;
  line-height: 1.3;
}

.article-content h3 {
  margin: 26px 0 8px;
}

.article-content p {
  margin: 0 0 16px;
  color: #2c3441;
}

.article-content ul {
  margin: 0 0 18px;
  padding-left: 22px;
  color: #2c3441;
}

.article-content li + li {
  margin-top: 8px;
}

.code-block {
  position: relative;
  margin: 18px 0 24px;
  border: 1px solid #343453;
  border-radius: 14px;
  overflow: hidden;
  background: var(--code-bg);
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--code-line);
  padding: 9px 12px;
  color: var(--blog-code-text);
  font-size: 0.84rem;
  background: var(--blog-code-surface);
}

.copy-btn {
  border: 1px solid #46466b;
  border-radius: 8px;
  color: var(--blog-code-text);
  background: #303051;
  padding: 5px 8px;
  font-size: 0.78rem;
  cursor: pointer;
}

.copy-btn:hover {
  background: #3b3b61;
}

.code-block pre {
  margin: 0;
  overflow-x: auto;
  padding: 16px;
}

.code-block code {
  display: block;
  font-family: var(--font-mono);
  color: var(--blog-code-text);
  font-size: 0.88rem;
  line-height: 1.7;
  white-space: pre;
}

.token-key {
  color: var(--blog-code-keyword);
}

.token-type {
  color: var(--blog-code-number);
}

.token-fn {
  color: var(--blog-code-function);
}

.token-str {
  color: var(--blog-code-string);
}

.token-comment {
  color: var(--blog-code-comment);
}

.related-posts {
  margin-top: 26px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 22px;
}

.related-posts h3 {
  margin-top: 0;
}

.related-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.related-links a {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 11px 12px;
  color: #2f3a4c;
  transition: all 0.2s ease;
}

.related-links a:hover {
  border-color: #c2ddcf;
  background: #f2f7f3;
}

.toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  background: #1c273d;
  color: #fff;
  border-radius: 10px;
  padding: 10px 12px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: all 0.25s ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.empty-result {
  padding: 26px 10px;
  text-align: center;
  color: var(--muted);
  font-weight: 500;
  grid-column: 1 / -1;
}

@media (max-width: 960px) {
  .hero-grid,
  .post-grid {
    grid-template-columns: 1fr;
  }

  .newsletter-wrap,
  .footer-grid {
    grid-template-columns: 1fr;
    display: grid;
  }

  .social-links,
  .quick-links {
    justify-content: flex-start;
  }
}

@media (max-width: 760px) {
  .menu-toggle {
    display: inline-flex;
    flex-direction: column;
    gap: 0;
  }

  .main-nav {
    position: absolute;
    left: 4%;
    right: 4%;
    top: 76px;
    background: rgba(245, 245, 240, 0.98);
    border: 1px solid var(--line);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    display: none;
    flex-direction: column;
    align-items: flex-start;
    padding: 12px;
    gap: 10px;
  }

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

  .article-content,
  .article-header,
  .related-posts {
    padding: 20px;
  }

  .article-meta {
    line-height: 1.8;
  }

  .article-content h2 {
    font-size: 1.45rem;
  }

  .article-content h3 {
    font-size: 1.2rem;
  }

  .code-block code {
    font-size: 0.8rem;
    line-height: 1.6;
  }

  .related-links {
    grid-template-columns: 1fr;
  }

  .post-meta-top {
    flex-wrap: wrap;
    gap: 8px;
  }

  .post-meta-bottom {
    flex-wrap: wrap;
  }

  .post-thumb {
    height: 175px;
  }

  .subscribe-form input {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .container {
    width: min(1120px, 94%);
  }

  .hero {
    padding-top: 64px;
  }

  .post-content {
    padding: 16px;
  }

  .post-thumb {
    height: 160px;
  }

  .article-content,
  .article-header,
  .related-posts {
    padding: 16px;
  }

  .code-block pre {
    padding: 12px;
  }
}