/* ==========================================================================
   Design tokens
   Calm green accent + warm neutrals. Both themes defined as custom properties.
   ========================================================================== */
:root {
  /* Palette — dark (default) */
  --bg: #15171b;
  --surface: #1b1e24;
  --fg: #dde0e4;
  --muted: #8b909b;
  --accent: #8fbf9d;
  --accent-strong: #a9d6b6;
  --accent-soft: rgba(143, 191, 157, 0.12);
  --border: #282c34;
  --glow: rgba(143, 191, 157, 0.16);
  --shadow: rgba(0, 0, 0, 0.35);

  /* Type */
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  --serif: "Fraunces", Georgia, "Times New Roman", serif;

  /* Layout */
  --measure: 42rem;
  --radius: 14px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f9f4;
    --surface: #ffffff;
    --fg: #23262b;
    --muted: #626771;
    --accent: #3f8f66;
    --accent-strong: #2f7a54;
    --accent-soft: rgba(63, 143, 102, 0.09);
    --border: #e1e8e0;
    --glow: rgba(63, 143, 102, 0.11);
    --shadow: rgba(31, 61, 45, 0.08);
  }
}

/* ==========================================================================
   Base
   ========================================================================== */
* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.7;
  padding: 0 1.25rem;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Soft calm-green wash anchored to the top of the page */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 75vh;
  background: radial-gradient(78% 55% at 50% -8%, var(--glow), transparent 70%);
  pointer-events: none;
  z-index: -1;
}

main,
.site-header,
.site-footer {
  max-width: var(--measure);
  margin-inline: auto;
}

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

/* Consistent, accessible focus ring */
a:focus-visible,
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ==========================================================================
   Header
   ========================================================================== */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  padding: 2rem 0 1.5rem;
}

.site-title {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
  color: var(--fg);
  text-decoration: none;
}

/* Small leaf-dot wordmark */
.site-title::before {
  content: "";
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50% 50% 50% 0;
  background: var(--accent);
  transform: rotate(45deg);
  flex: none;
}

.site-header nav {
  display: flex;
  gap: 1.5rem;
}

.site-header nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.18s ease;
}

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

/* ==========================================================================
   Hero / intro (homepage)
   ========================================================================== */
.intro {
  margin: 3.5rem 0 4.5rem;
}

/* Short accent bar as a calm decorative anchor */
.intro::before {
  content: "";
  display: block;
  width: 2.75rem;
  height: 3px;
  border-radius: 3px;
  background: var(--accent);
  margin-bottom: 1.75rem;
}

.intro-lead {
  margin: 0;
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(1.7rem, 5vw, 2.35rem);
  line-height: 1.32;
  letter-spacing: -0.015em;
  max-width: 24ch;
}

.intro-note {
  margin: 1.75rem 0 0;
  padding-left: 1.1rem;
  border-left: 2px solid var(--border);
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.6;
  max-width: 42ch;
}

.asterisk {
  color: var(--accent);
  font-weight: 600;
}

/* ==========================================================================
   Post list (homepage)
   ========================================================================== */
.posts {
  margin-top: 3rem;
}

.page-title {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin: 0 0 1.25rem;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

.post-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.post-list-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  transition: border-color 0.18s ease, transform 0.18s ease,
    box-shadow 0.18s ease;
}

.post-list-item:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px -14px var(--shadow);
}

.post-link {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 0.2rem 1rem;
  padding: 1.1rem 1.35rem;
  text-decoration: none;
  color: inherit;
}

.post-date {
  grid-column: 1;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  font-size: 0.8rem;
  letter-spacing: 0.02em;
}

.post-title {
  grid-column: 1;
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.2rem;
  line-height: 1.3;
  color: var(--fg);
}

.post-arrow {
  grid-column: 2;
  grid-row: 1 / 3;
  color: var(--accent);
  font-size: 1.1rem;
  transform: translateX(-0.25rem);
  opacity: 0;
  transition: transform 0.18s ease, opacity 0.18s ease;
}

.post-list-item:hover .post-arrow {
  opacity: 1;
  transform: translateX(0);
}

/* Empty state — designed, not an afterthought */
.post-list-empty {
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  text-align: center;
  color: var(--muted);
  font-style: italic;
}

/* ==========================================================================
   Article
   ========================================================================== */
.post {
  margin-top: 3rem;
}

.post-header {
  margin-bottom: 2.5rem;
}

.post-header h1 {
  margin: 0.35rem 0 0.5rem;
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(1.8rem, 4.5vw, 2.4rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
}

.post-header time {
  color: var(--muted);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.post h2,
.post h3 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.25;
  margin-top: 2.25rem;
}

.post p,
.post ul,
.post ol {
  margin: 1.15rem 0;
}

.post img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
}

.post pre {
  overflow-x: auto;
  padding: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 0.9rem;
}

.post code {
  font-size: 0.9em;
}

.post :not(pre) > code {
  background: var(--accent-soft);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

.post blockquote {
  margin-inline: 0;
  padding: 0.25rem 0 0.25rem 1.25rem;
  border-left: 3px solid var(--accent);
  color: var(--muted);
  font-style: italic;
}

.back {
  margin-top: 3.5rem;
}

.back a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.18s ease;
}

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

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  margin-top: 5rem;
  padding: 2rem 0 3rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
}

.site-footer p {
  margin: 0.4rem 0;
}

.site-footer a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.18s ease;
}

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

.made-with .heart {
  color: var(--accent);
  font-weight: 600;
}

/* ==========================================================================
   Motion / responsive
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
  .post-list-item:hover {
    transform: none;
  }
}

@media (max-width: 32rem) {
  .intro {
    margin: 2.5rem 0 3.5rem;
  }
  .post-link {
    padding: 1rem 1.15rem;
  }
}