/* ──────────────────────────────────────────────────────────────
   Jaxon Didericksen — personal site
   Calm & modern. System fonts only, no external requests.
   ────────────────────────────────────────────────────────────── */

:root {
  /* Type — native system stacks, zero network cost */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Iowan Old Style", "Palatino Linotype", Palatino,
    "Book Antiqua", Georgia, "Times New Roman", serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", "Segoe UI Mono",
    "Roboto Mono", Menlo, Consolas, "Courier New", monospace;

  /* Warm, calm light palette */
  --color-bg: #fbfaf8;
  --color-surface: #ffffff;
  --color-text: #2b2a27;
  --color-muted: #6b6a64;
  --color-faint: #93918a;
  --color-accent: #4f8a6e;
  --color-accent-strong: #3f7a60;
  --color-accent-soft: #ecf3ef;
  --color-border: #e9e6e0;
  --color-code-bg: #f3f1ec;
  --shadow-sm: 0 1px 2px rgba(43, 42, 39, 0.04);
  --shadow-md: 0 6px 24px -12px rgba(43, 42, 39, 0.18);

  --max-width: 44rem;
  --space: 1.5rem;
  --radius: 14px;
  --radius-sm: 8px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1a1917;
    --color-surface: #211f1c;
    --color-text: #e9e7e2;
    --color-muted: #a8a59d;
    --color-faint: #7c7a73;
    --color-accent: #7bbd9d;
    --color-accent-strong: #8fcaac;
    --color-accent-soft: #21302a;
    --color-border: #322f2b;
    --color-code-bg: #26241f;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 28px -14px rgba(0, 0, 0, 0.55);
  }
}

/* ── Reset & base ── */
*, *::before, *::after { box-sizing: border-box; }

html {
  font-size: 18px;
  line-height: 1.72;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-feature-settings: "kern", "liga", "calt";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
}

a {
  color: var(--color-accent-strong);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: color-mix(in srgb, var(--color-accent) 40%, transparent);
  transition: color 0.18s ease, text-decoration-color 0.18s ease;
}
a:hover {
  color: var(--color-accent);
  text-decoration-color: currentColor;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 3px;
}

img { max-width: 100%; height: auto; }

/* ── Header ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: baseline;
  gap: 2rem;
  flex-wrap: wrap;
  padding: 1.15rem clamp(1.25rem, 5vw, 2.5rem);
  background: color-mix(in srgb, var(--color-bg) 80%, transparent);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.site-title {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
  color: var(--color-text);
}
.site-title:hover { color: var(--color-accent); }

.site-nav {
  display: flex;
  gap: 1.5rem;
  margin-left: auto;
  font-size: 0.9rem;
}
.site-nav a {
  color: var(--color-muted);
  text-decoration: none;
  font-weight: 500;
}
.site-nav a:hover { color: var(--color-text); }

/* ── Layout ── */
.page-content {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: clamp(2.5rem, 6vw, 4.5rem) clamp(1.25rem, 5vw, 1.5rem);
  flex: 1 0 auto;
}

/* ── Home intro / hero ── */
.home-intro {
  margin-bottom: calc(var(--space) * 2.2);
  padding-bottom: calc(var(--space) * 1.6);
  border-bottom: 1px solid var(--color-border);
}
.home-intro p {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(1.3rem, 3.5vw, 1.6rem);
  line-height: 1.45;
  color: var(--color-text);
  text-wrap: balance;
}

/* ── Post list ── */
.post-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.post-list li {
  padding: 1.4rem 1.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.18s ease, box-shadow 0.18s ease,
    border-color 0.18s ease;
}
.post-list li:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: color-mix(in srgb, var(--color-accent) 45%, var(--color-border));
}
.post-list .post-link {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 600;
  line-height: 1.3;
  text-decoration: none;
  color: var(--color-text);
}
.post-list li:hover .post-link { color: var(--color-accent); }
.post-list .post-meta {
  margin-top: 0.3rem;
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: var(--color-faint);
}
.post-list .post-excerpt {
  margin: 0.6rem 0 0;
  font-size: 0.97rem;
  color: var(--color-muted);
}

/* ── Single post ── */
.post-header {
  margin-bottom: calc(var(--space) * 1.6);
  padding-bottom: var(--space);
  border-bottom: 1px solid var(--color-border);
}
.post-header h1 {
  margin: 0 0 0.5rem;
  font-family: var(--font-serif);
  font-size: clamp(1.9rem, 5vw, 2.5rem);
  line-height: 1.18;
  letter-spacing: -0.015em;
  text-wrap: balance;
}
.post-date {
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  color: var(--color-faint);
}
.post-tags {
  margin-top: 0.85rem;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.tag {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
  padding: 0.25em 0.7em;
  border-radius: 999px;
}

/* ── Long-form content ── */
.post-content > * + * { margin-top: 1.3rem; }
.post-content h2,
.post-content h3,
.post-content h4 {
  font-family: var(--font-serif);
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin-top: 2.5rem;
}
.post-content h2 { font-size: 1.6rem; }
.post-content h3 { font-size: 1.3rem; }
.post-content img {
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
}
.post-content hr {
  margin: 2.5rem 0;
  border: none;
  border-top: 1px solid var(--color-border);
}
.post-content blockquote {
  margin: 1.8rem 0;
  padding: 0.4rem 0 0.4rem 1.4rem;
  border-left: 3px solid var(--color-accent);
  color: var(--color-muted);
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.12rem;
}
.post-content blockquote p { margin: 0; }
.post-content ul,
.post-content ol { padding-left: 1.4rem; }
.post-content li + li { margin-top: 0.4rem; }
.post-content pre {
  background: var(--color-code-bg);
  padding: 1.1rem 1.25rem;
  overflow-x: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.55;
}
.post-content code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: var(--color-code-bg);
  padding: 0.15em 0.4em;
  border-radius: 5px;
}
.post-content pre code { background: none; padding: 0; }

.post-footer {
  margin-top: 3.5rem;
  padding-top: var(--space);
  border-top: 1px solid var(--color-border);
  font-size: 0.92rem;
}
.post-footer a { font-weight: 500; }

/* ── Generic page ── */
.page-header h1 {
  margin: 0 0 1.6rem;
  font-family: var(--font-serif);
  font-size: clamp(1.9rem, 5vw, 2.4rem);
  letter-spacing: -0.015em;
}

/* ── Footer ── */
.site-footer {
  flex-shrink: 0;
  padding: 2rem clamp(1.25rem, 5vw, 2.5rem);
  border-top: 1px solid var(--color-border);
  font-size: 0.82rem;
  color: var(--color-faint);
  text-align: center;
}
.site-footer p { margin: 0; }

/* ── Motion preference ── */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ── Small screens ── */
@media (max-width: 600px) {
  html { font-size: 16.5px; }
  .site-header { gap: 0.75rem; }
  .site-nav { gap: 1.1rem; }
  .post-list li { padding: 1.2rem 1.25rem; }
}