@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@300;400;500;600&display=swap');

:root {
  color-scheme: dark;
  --bg: #0b0d12;
  --surface: #0f131b;
  --panel: #121826;
  --ink: #e7e9f2;
  --muted: #9aa4b4;
  --accent: #a5f0c5;
  --line: #1f2533;
  --radius: 16px;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #ffffff;
  --surface: #ffffff;
  --panel: #f7f4ef;
  --ink: #0b0f17;
  --muted: #2f3947;
  --accent: #0a6b57;
  --line: #d6d0c6;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "IBM Plex Mono", "SFMono-Regular", ui-monospace, monospace;
  background: radial-gradient(circle at 10% 10%, #121a2a 0%, transparent 40%),
    radial-gradient(circle at 90% 20%, #172032 0%, transparent 45%), var(--bg);
  color: var(--ink);
}

:root[data-theme="light"] body {
  background: #ffffff;
}

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

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

.container {
  width: min(980px, 92vw);
  margin: 0 auto;
}

.site-header {
  padding: 28px 0 12px;
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.site-header a {
  font-weight: 500;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.85rem;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  cursor: pointer;
}

.theme-toggle svg {
  width: 16px;
  height: 16px;
  display: block;
}

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

.posts-hero {
  padding: 28px 0 18px;
  border-bottom: 1px dashed var(--line);
}

.posts-hero h1 {
  font-size: clamp(2rem, 3.6vw, 3rem);
  margin: 0 0 16px;
  letter-spacing: -0.02em;
}

.posts-hero p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.posts-list {
  display: grid;
  gap: 16px;
  padding: 24px 0 64px;
}

.post-item,
.post-content {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}

.post-item h2 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.post-item time {
  color: var(--muted);
  font-size: 0.9rem;
}

.post-content header h1 {
  font-size: clamp(1.8rem, 3.2vw, 2.6rem);
  margin: 0 0 10px;
  letter-spacing: -0.02em;
}

.post-content header time {
  color: var(--muted);
  font-size: 0.9rem;
}

.post-body {
  margin-top: 24px;
  line-height: 1.75;
  color: var(--ink);
}

.post-body h2,
.post-body h3 {
  margin-top: 28px;
}

.post-body img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
  border-radius: 12px;
}

.post-body figure {
  margin: 24px 0;
}

.post-body pre {
  background: #0b0f17;
  color: #f2f5fa;
  padding: 16px;
  border-radius: 12px;
  overflow: auto;
}

.post-body code {
  background: #202635;
  padding: 2px 6px;
  border-radius: 6px;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 20px 0 36px;
  color: var(--muted);
  font-size: 0.8rem;
}

.posts-error {
  color: var(--muted);
}

.nav-link {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  color: var(--accent);
}

@media (max-width: 640px) {
  .post-item,
  .post-content {
    padding: 18px;
  }
}