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

/* Base */
:root {
  --color-bg: #FAF9F7;
  --color-text: #3D3D3D;
  --color-text-muted: #6B6B6B;
  --color-accent: #4A9E9E;
  --color-accent-hover: #3D8585;
  --color-border: #E8E6E3;
  --color-code-bg: #F0EEEB;
  --color-main-bg: #FDFCFB;
  --content-width: 960px;
}

/* Dark mode - system preference */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg: #1a1a1a;
    --color-text: #e0e0e0;
    --color-text-muted: #a0a0a0;
    --color-accent: #5fbfbf;
    --color-accent-hover: #7cd3d3;
    --color-border: #333333;
    --color-code-bg: #2a2a2a;
    --color-main-bg: #222222;
  }
}

/* Dark mode - manual override */
:root[data-theme="dark"] {
  --color-bg: #1a1a1a;
  --color-text: #e0e0e0;
  --color-text-muted: #a0a0a0;
  --color-accent: #5fbfbf;
  --color-accent-hover: #7cd3d3;
  --color-border: #333333;
  --color-code-bg: #2a2a2a;
  --color-main-bg: #222222;
}

/* Theme toggle button */
.theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  color: var(--color-accent);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
}

.theme-toggle .icon-sun {
  display: none;
}

.theme-toggle .icon-moon {
  display: block;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-sun {
    display: block;
  }
  :root:not([data-theme="light"]) .theme-toggle .icon-moon {
    display: none;
  }
}

:root[data-theme="dark"] .theme-toggle .icon-sun {
  display: block;
}

:root[data-theme="dark"] .theme-toggle .icon-moon {
  display: none;
}

:root[data-theme="light"] .theme-toggle .icon-sun {
  display: none;
}

:root[data-theme="light"] .theme-toggle .icon-moon {
  display: block;
}

html {
  font-size: 18px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

/* Header */
.site-header {
  padding: 24px 24px;
  border-bottom: 1px solid var(--color-border);
}

.header-content {
  max-width: var(--content-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.site-logo-icon {
  width: 44px;
  height: 44px;
  transition: opacity 0.2s;
}

.site-logo:hover .site-logo-icon {
  opacity: 0.8;
}

.site-nav {
  display: flex;
  gap: 24px;
}

.site-nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
}

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

/* Language switcher */
.lang-active {
  color: var(--color-accent);
  font-weight: 600;
}

/* Main */
main {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 48px 24px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  margin-top: 32px;
  margin-bottom: 32px;
  background-color: var(--color-main-bg);
}

/* Hero (homepage) */
.hero {
  text-align: center;
  padding: 64px 0;
}

.hero-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: 1.8rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.hero-tagline {
  color: var(--color-text-muted);
  max-width: 480px;
  margin: 0 auto;
}

/* Recent posts */
.recent-posts {
  margin-top: 48px;
}

.recent-posts h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 24px;
  color: var(--color-text-muted);
}

.post-list {
  list-style: none;
}

.post-list li {
  margin-bottom: 16px;
}

.post-list a {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 600;
}

.post-list a:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

.post-date {
  color: var(--color-text-muted);
  font-size: 0.8rem;
  margin-left: 12px;
}

/* Page/Post content */
.page-header {
  margin-bottom: 32px;
}

.page-header h1 {
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.page-meta {
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

.content h2 {
  font-size: 1.4rem;
  font-weight: 600;
  margin-top: 48px;
  margin-bottom: 16px;
}

.content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 32px;
  margin-bottom: 12px;
}

.content p {
  margin-bottom: 16px;
}

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

.content a:hover {
  text-decoration: underline;
}

.content ul, .content ol {
  margin-bottom: 16px;
  padding-left: 24px;
}

.content li {
  margin-bottom: 8px;
}

.content code {
  font-family: 'SFMono-Regular', Consolas, monospace;
  font-size: 0.85em;
  background-color: var(--color-code-bg);
  padding: 2px 6px;
  border-radius: 4px;
}

.content pre {
  background-color: var(--color-code-bg);
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  margin-bottom: 16px;
}

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

/* Syntax highlighting (Chroma) - light (default) */
.chroma .err { color:#f6f8fa;background-color:#82071e }
.chroma .k { color:#cf222e }
.chroma .kc { color:#cf222e }
.chroma .kd { color:#cf222e }
.chroma .kn { color:#cf222e }
.chroma .kp { color:#cf222e }
.chroma .kr { color:#cf222e }
.chroma .kt { color:#cf222e }
.chroma .na { color:#1f2328 }
.chroma .nc { color:#1f2328 }
.chroma .no { color:#0550ae }
.chroma .nd { color:#0550ae }
.chroma .ni { color:#6639ba }
.chroma .nl { color:#900;font-weight:bold }
.chroma .nn { color:#24292e }
.chroma .nx { color:#1f2328 }
.chroma .nt { color:#0550ae }
.chroma .nb { color:#6639ba }
.chroma .bp { color:#6a737d }
.chroma .nv { color:#953800 }
.chroma .vc { color:#953800 }
.chroma .vg { color:#953800 }
.chroma .vi { color:#953800 }
.chroma .vm { color:#953800 }
.chroma .nf { color:#6639ba }
.chroma .fm { color:#6639ba }
.chroma .s { color:#0a3069 }
.chroma .sa { color:#0a3069 }
.chroma .sb { color:#0a3069 }
.chroma .sc { color:#0a3069 }
.chroma .dl { color:#0a3069 }
.chroma .sd { color:#0a3069 }
.chroma .s2 { color:#0a3069 }
.chroma .se { color:#0a3069 }
.chroma .sh { color:#0a3069 }
.chroma .si { color:#0a3069 }
.chroma .sx { color:#0a3069 }
.chroma .sr { color:#0a3069 }
.chroma .s1 { color:#0a3069 }
.chroma .ss { color:#032f62 }
.chroma .m { color:#0550ae }
.chroma .mb { color:#0550ae }
.chroma .mf { color:#0550ae }
.chroma .mh { color:#0550ae }
.chroma .mi { color:#0550ae }
.chroma .il { color:#0550ae }
.chroma .mo { color:#0550ae }
.chroma .o { color:#0550ae }
.chroma .ow { color:#0550ae }
.chroma .or { color:#0550ae }
.chroma .p { color:#1f2328 }
.chroma .c { color:#57606a }
.chroma .ch { color:#57606a }
.chroma .cm { color:#57606a }
.chroma .c1 { color:#57606a }
.chroma .cs { color:#57606a }
.chroma .cp { color:#57606a }
.chroma .cpf { color:#57606a }
.chroma .gd { color:#82071e;background-color:#ffebe9 }
.chroma .ge { color:#1f2328 }
.chroma .gi { color:#116329;background-color:#dafbe1 }
.chroma .go { color:#1f2328 }
.chroma .gl { text-decoration:underline }
.chroma .w { color:#fff }

/* Syntax highlighting (Chroma) - dark */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .chroma .err { color:#f85149 }
  :root:not([data-theme="light"]) .chroma .k { color:#ff7b72 }
  :root:not([data-theme="light"]) .chroma .kc { color:#79c0ff }
  :root:not([data-theme="light"]) .chroma .kd { color:#ff7b72 }
  :root:not([data-theme="light"]) .chroma .kn { color:#ff7b72 }
  :root:not([data-theme="light"]) .chroma .kp { color:#79c0ff }
  :root:not([data-theme="light"]) .chroma .kr { color:#ff7b72 }
  :root:not([data-theme="light"]) .chroma .kt { color:#ff7b72 }
  :root:not([data-theme="light"]) .chroma .nc { color:#f0883e;font-weight:bold }
  :root:not([data-theme="light"]) .chroma .no { color:#79c0ff;font-weight:bold }
  :root:not([data-theme="light"]) .chroma .nd { color:#d2a8ff;font-weight:bold }
  :root:not([data-theme="light"]) .chroma .ni { color:#ffa657 }
  :root:not([data-theme="light"]) .chroma .ne { color:#f0883e;font-weight:bold }
  :root:not([data-theme="light"]) .chroma .nl { color:#79c0ff;font-weight:bold }
  :root:not([data-theme="light"]) .chroma .nn { color:#ff7b72 }
  :root:not([data-theme="light"]) .chroma .nx { color:#e6edf3 }
  :root:not([data-theme="light"]) .chroma .py { color:#79c0ff }
  :root:not([data-theme="light"]) .chroma .nt { color:#7ee787 }
  :root:not([data-theme="light"]) .chroma .nv { color:#79c0ff }
  :root:not([data-theme="light"]) .chroma .vc { color:#79c0ff }
  :root:not([data-theme="light"]) .chroma .vg { color:#79c0ff }
  :root:not([data-theme="light"]) .chroma .vi { color:#79c0ff }
  :root:not([data-theme="light"]) .chroma .vm { color:#79c0ff }
  :root:not([data-theme="light"]) .chroma .nf { color:#d2a8ff;font-weight:bold }
  :root:not([data-theme="light"]) .chroma .fm { color:#d2a8ff;font-weight:bold }
  :root:not([data-theme="light"]) .chroma .l { color:#a5d6ff }
  :root:not([data-theme="light"]) .chroma .ld { color:#79c0ff }
  :root:not([data-theme="light"]) .chroma .s { color:#a5d6ff }
  :root:not([data-theme="light"]) .chroma .sa { color:#79c0ff }
  :root:not([data-theme="light"]) .chroma .sb { color:#a5d6ff }
  :root:not([data-theme="light"]) .chroma .sc { color:#a5d6ff }
  :root:not([data-theme="light"]) .chroma .dl { color:#79c0ff }
  :root:not([data-theme="light"]) .chroma .sd { color:#a5d6ff }
  :root:not([data-theme="light"]) .chroma .s2 { color:#a5d6ff }
  :root:not([data-theme="light"]) .chroma .se { color:#79c0ff }
  :root:not([data-theme="light"]) .chroma .sh { color:#79c0ff }
  :root:not([data-theme="light"]) .chroma .si { color:#a5d6ff }
  :root:not([data-theme="light"]) .chroma .sx { color:#a5d6ff }
  :root:not([data-theme="light"]) .chroma .sr { color:#79c0ff }
  :root:not([data-theme="light"]) .chroma .s1 { color:#a5d6ff }
  :root:not([data-theme="light"]) .chroma .ss { color:#a5d6ff }
  :root:not([data-theme="light"]) .chroma .m { color:#a5d6ff }
  :root:not([data-theme="light"]) .chroma .mb { color:#a5d6ff }
  :root:not([data-theme="light"]) .chroma .mf { color:#a5d6ff }
  :root:not([data-theme="light"]) .chroma .mh { color:#a5d6ff }
  :root:not([data-theme="light"]) .chroma .mi { color:#a5d6ff }
  :root:not([data-theme="light"]) .chroma .il { color:#a5d6ff }
  :root:not([data-theme="light"]) .chroma .mo { color:#a5d6ff }
  :root:not([data-theme="light"]) .chroma .o { color:#ff7b72;font-weight:bold }
  :root:not([data-theme="light"]) .chroma .ow { color:#ff7b72;font-weight:bold }
  :root:not([data-theme="light"]) .chroma .or { color:#ff7b72;font-weight:bold }
  :root:not([data-theme="light"]) .chroma .c { color:#8b949e;font-style:italic }
  :root:not([data-theme="light"]) .chroma .ch { color:#8b949e;font-style:italic }
  :root:not([data-theme="light"]) .chroma .cm { color:#8b949e;font-style:italic }
  :root:not([data-theme="light"]) .chroma .c1 { color:#8b949e;font-style:italic }
  :root:not([data-theme="light"]) .chroma .cs { color:#8b949e;font-weight:bold;font-style:italic }
  :root:not([data-theme="light"]) .chroma .cp { color:#8b949e;font-weight:bold;font-style:italic }
  :root:not([data-theme="light"]) .chroma .cpf { color:#8b949e;font-weight:bold;font-style:italic }
  :root:not([data-theme="light"]) .chroma .gd { color:#ffa198;background-color:#490202 }
  :root:not([data-theme="light"]) .chroma .ge { font-style:italic }
  :root:not([data-theme="light"]) .chroma .gr { color:#ffa198 }
  :root:not([data-theme="light"]) .chroma .gh { color:#79c0ff;font-weight:bold }
  :root:not([data-theme="light"]) .chroma .gi { color:#56d364;background-color:#0f5323 }
  :root:not([data-theme="light"]) .chroma .go { color:#8b949e }
  :root:not([data-theme="light"]) .chroma .gp { color:#8b949e }
  :root:not([data-theme="light"]) .chroma .gs { font-weight:bold }
  :root:not([data-theme="light"]) .chroma .gu { color:#79c0ff }
  :root:not([data-theme="light"]) .chroma .gt { color:#ff7b72 }
  :root:not([data-theme="light"]) .chroma .gl { text-decoration:underline }
  :root:not([data-theme="light"]) .chroma .w { color:#6e7681 }
}
:root[data-theme="dark"] .chroma .err { color:#f85149 }
:root[data-theme="dark"] .chroma .k { color:#ff7b72 }
:root[data-theme="dark"] .chroma .kc { color:#79c0ff }
:root[data-theme="dark"] .chroma .kd { color:#ff7b72 }
:root[data-theme="dark"] .chroma .kn { color:#ff7b72 }
:root[data-theme="dark"] .chroma .kp { color:#79c0ff }
:root[data-theme="dark"] .chroma .kr { color:#ff7b72 }
:root[data-theme="dark"] .chroma .kt { color:#ff7b72 }
:root[data-theme="dark"] .chroma .nc { color:#f0883e;font-weight:bold }
:root[data-theme="dark"] .chroma .no { color:#79c0ff;font-weight:bold }
:root[data-theme="dark"] .chroma .nd { color:#d2a8ff;font-weight:bold }
:root[data-theme="dark"] .chroma .ni { color:#ffa657 }
:root[data-theme="dark"] .chroma .ne { color:#f0883e;font-weight:bold }
:root[data-theme="dark"] .chroma .nl { color:#79c0ff;font-weight:bold }
:root[data-theme="dark"] .chroma .nn { color:#ff7b72 }
:root[data-theme="dark"] .chroma .nx { color:#e6edf3 }
:root[data-theme="dark"] .chroma .py { color:#79c0ff }
:root[data-theme="dark"] .chroma .nt { color:#7ee787 }
:root[data-theme="dark"] .chroma .nv { color:#79c0ff }
:root[data-theme="dark"] .chroma .vc { color:#79c0ff }
:root[data-theme="dark"] .chroma .vg { color:#79c0ff }
:root[data-theme="dark"] .chroma .vi { color:#79c0ff }
:root[data-theme="dark"] .chroma .vm { color:#79c0ff }
:root[data-theme="dark"] .chroma .nf { color:#d2a8ff;font-weight:bold }
:root[data-theme="dark"] .chroma .fm { color:#d2a8ff;font-weight:bold }
:root[data-theme="dark"] .chroma .l { color:#a5d6ff }
:root[data-theme="dark"] .chroma .ld { color:#79c0ff }
:root[data-theme="dark"] .chroma .s { color:#a5d6ff }
:root[data-theme="dark"] .chroma .sa { color:#79c0ff }
:root[data-theme="dark"] .chroma .sb { color:#a5d6ff }
:root[data-theme="dark"] .chroma .sc { color:#a5d6ff }
:root[data-theme="dark"] .chroma .dl { color:#79c0ff }
:root[data-theme="dark"] .chroma .sd { color:#a5d6ff }
:root[data-theme="dark"] .chroma .s2 { color:#a5d6ff }
:root[data-theme="dark"] .chroma .se { color:#79c0ff }
:root[data-theme="dark"] .chroma .sh { color:#79c0ff }
:root[data-theme="dark"] .chroma .si { color:#a5d6ff }
:root[data-theme="dark"] .chroma .sx { color:#a5d6ff }
:root[data-theme="dark"] .chroma .sr { color:#79c0ff }
:root[data-theme="dark"] .chroma .s1 { color:#a5d6ff }
:root[data-theme="dark"] .chroma .ss { color:#a5d6ff }
:root[data-theme="dark"] .chroma .m { color:#a5d6ff }
:root[data-theme="dark"] .chroma .mb { color:#a5d6ff }
:root[data-theme="dark"] .chroma .mf { color:#a5d6ff }
:root[data-theme="dark"] .chroma .mh { color:#a5d6ff }
:root[data-theme="dark"] .chroma .mi { color:#a5d6ff }
:root[data-theme="dark"] .chroma .il { color:#a5d6ff }
:root[data-theme="dark"] .chroma .mo { color:#a5d6ff }
:root[data-theme="dark"] .chroma .o { color:#ff7b72;font-weight:bold }
:root[data-theme="dark"] .chroma .ow { color:#ff7b72;font-weight:bold }
:root[data-theme="dark"] .chroma .or { color:#ff7b72;font-weight:bold }
:root[data-theme="dark"] .chroma .c { color:#8b949e;font-style:italic }
:root[data-theme="dark"] .chroma .ch { color:#8b949e;font-style:italic }
:root[data-theme="dark"] .chroma .cm { color:#8b949e;font-style:italic }
:root[data-theme="dark"] .chroma .c1 { color:#8b949e;font-style:italic }
:root[data-theme="dark"] .chroma .cs { color:#8b949e;font-weight:bold;font-style:italic }
:root[data-theme="dark"] .chroma .cp { color:#8b949e;font-weight:bold;font-style:italic }
:root[data-theme="dark"] .chroma .cpf { color:#8b949e;font-weight:bold;font-style:italic }
:root[data-theme="dark"] .chroma .gd { color:#ffa198;background-color:#490202 }
:root[data-theme="dark"] .chroma .ge { font-style:italic }
:root[data-theme="dark"] .chroma .gr { color:#ffa198 }
:root[data-theme="dark"] .chroma .gh { color:#79c0ff;font-weight:bold }
:root[data-theme="dark"] .chroma .gi { color:#56d364;background-color:#0f5323 }
:root[data-theme="dark"] .chroma .go { color:#8b949e }
:root[data-theme="dark"] .chroma .gp { color:#8b949e }
:root[data-theme="dark"] .chroma .gs { font-weight:bold }
:root[data-theme="dark"] .chroma .gu { color:#79c0ff }
:root[data-theme="dark"] .chroma .gt { color:#ff7b72 }
:root[data-theme="dark"] .chroma .gl { text-decoration:underline }
:root[data-theme="dark"] .chroma .w { color:#6e7681 }

.content blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: 16px;
  margin: 16px 0;
  color: var(--color-text-muted);
}

/* Contact form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  font-family: inherit;
  font-size: 0.95rem;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background-color: var(--color-bg);
  color: var(--color-text);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.form-group textarea {
  resize: vertical;
}

.form-submit {
  align-self: flex-start;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 10px 24px;
  background-color: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

.form-submit:hover {
  background-color: var(--color-accent-hover);
}

.form-status {
  font-size: 0.9rem;
  margin-top: 4px;
}

.form-success {
  color: var(--color-accent);
}

.form-error {
  color: #c0392b;
}

.form-rate-limit-notice {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

/* Footer */
.site-footer {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 48px 24px;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--color-border);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  gap: 32px;
}

.footer-section h3 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-nav a {
  color: var(--color-text-muted);
  text-decoration: none;
}

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

.footer-icon-link {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-icon-link svg {
  flex-shrink: 0;
}

.footer-nav .lang-active {
  color: var(--color-accent);
  font-weight: 600;
}

.footer-bottom {
  margin-top: 32px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: 0.8rem;
}

/* Mobile */
@media (max-width: 600px) {
  html {
    font-size: 16px;
  }

  .header-content {
    flex-direction: column;
    gap: 16px;
  }

  .hero {
    padding: 32px 0;
  }

  .hero-avatar {
    width: 100px;
    height: 100px;
  }

  .footer-content {
    flex-direction: column;
    gap: 24px;
  }

}