/* ikozyrev.online — calm, minimal blog theme
   Light warm-neutral canvas, slate text, one deep-teal accent. */

:root {
  --bg:        #fbfaf8;   /* warm-neutral page */
  --fg:        #1b1f27;   /* near-black slate text */
  --muted:     #6b7280;   /* secondary text */
  --accent:    #21706a;   /* deep teal — links, brand dot, hovers */
  --accent-10: #21706a14; /* faint tint for callouts */
  --border:    #ececec;   /* hairlines, card edges */
  --code-bg:   #f4f3f0;   /* code / pre box */

  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --serif: Georgia, "Iowan Old Style", "Iowan", "Times New Roman", serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;

  --measure: 720px;
}

/* Base ------------------------------------------------------------------ */

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover { text-decoration: underline; }

/* Header ---------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 1.1rem 1.5rem;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--fg);
  line-height: 1.25;
}
.brand:hover { text-decoration: none; }

/* the small teal block after the "ik" mark */
.brand .dot { color: var(--accent); }

/* role line under the full-name brand (post pages) */
.brand-role {
  display: block;
  font-size: 0.78rem;
  font-weight: 400;
  color: var(--muted);
  margin-top: 0.1rem;
}

.nav {
  display: flex;
  gap: 1.4rem;
}
.nav a {
  color: var(--muted);
  font-size: 0.95rem;
}
.nav a:hover {
  color: var(--accent);
  text-decoration: none;
}

/* Content column -------------------------------------------------------- */

.content {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

/* Homepage lead --------------------------------------------------------- */

.intro,
.hero {
  font-size: 1.15rem;
  line-height: 1.6;
  color: var(--fg);
  margin: 0 0 2.5rem;
}

/* Home: post list ------------------------------------------------------- */

.post-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.post-list li { margin: 0; }

/* the whole card is the link */
.post-link,
.post-card {
  display: block;
  padding: 1.1rem 1.3rem 0.4rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  color: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}
.post-link:hover,
.post-card:hover {
  border-color: var(--accent);
  box-shadow: 0 6px 18px -10px rgba(27, 31, 39, 0.25);
  transform: translateY(-2px);
  text-decoration: none;
}

.post-date {
  display: block;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--muted);
  margin-bottom: 0.3rem;
}

.post-title {
  display: block;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--fg);
  line-height: 1.35;
}
.post-link:hover .post-title,
.post-card:hover .post-title { color: var(--accent); }

/* excerpt sits as a sibling <p> after the link inside the <li> */
.post-excerpt {
  margin: 0.4rem 0 0;
  padding: 0 1.3rem 0.2rem;
  font-size: 0.95rem;
  color: var(--muted);
  line-height: 1.5;
}

/* Post body ------------------------------------------------------------- */

.post h1 {
  font-family: var(--sans);
  font-size: 2rem;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 0.5rem;
}

.post-meta {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0 0 2rem;
}

.post h2 {
  font-family: var(--sans);
  font-size: 1.3rem;
  line-height: 1.3;
  margin: 2.6rem 0 0.8rem;
}

/* serif reading body */
.post p,
.post ul,
.post li {
  font-family: var(--serif);
  font-size: 1.18rem;
  line-height: 1.7;
}
.post p { margin: 0 0 1.3rem; }
.post ul { margin: 0 0 1.3rem; padding-left: 1.4rem; }
.post li { margin: 0 0 0.5rem; }

.post blockquote {
  margin: 1.6rem 0;
  padding: 0.2rem 0 0.2rem 1.2rem;
  border-left: 3px solid var(--accent);
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.18rem;
  line-height: 1.6;
  color: var(--muted);
}

/* inline + block code */
code {
  font-family: var(--mono);
  font-size: 0.875em;
  background: var(--code-bg);
  padding: 0.12em 0.35em;
  border-radius: 4px;
}
pre {
  background: var(--code-bg);
  border-radius: 8px;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  margin: 0 0 1.5rem;
  line-height: 1.5;
}
pre code {
  background: none;
  padding: 0;
  font-size: 0.85rem;
}

/* source / callout */
.source {
  background: var(--accent-10);
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  padding: 0.9rem 1.1rem;
  font-family: var(--serif);
  font-size: 1.02rem;
  color: var(--fg);
}

/* back-link at the foot of a post */
.post-nav {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.95rem;
}
.post-nav a { color: var(--muted); }
.post-nav a:hover { color: var(--accent); }

/* Footer ---------------------------------------------------------------- */

.site-footer {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 1.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--muted);
}
.copy { white-space: nowrap; }
.footer-links {
  display: flex;
  gap: 1.2rem;
}
.footer-links a { color: var(--muted); }
.footer-links a:hover { color: var(--accent); }

/* 404 notice ------------------------------------------------------------ */

.notice {
  text-align: center;
  padding: 3rem 0;
}
.notice .code {
  font-size: 4.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--accent);
  margin-bottom: 0.5rem;
}
.notice h1 {
  font-size: 1.5rem;
  margin: 0 0 0.8rem;
}
.notice p {
  color: var(--muted);
  margin: 0.4rem 0;
}

/* Mobile ---------------------------------------------------------------- */

@media (max-width: 640px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
    padding: 0.9rem 1.1rem;
  }
  .nav { gap: 1.1rem; }

  .content { padding: 2rem 1.1rem 3rem; }

  .post h1 { font-size: 1.6rem; }
  .post p, .post ul, .post li,
  .post blockquote { font-size: 1.08rem; }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
    padding: 1.2rem 1.1rem;
  }

  .notice .code { font-size: 3.5rem; }
}