/* ------------------------------------------------------------------
   Personal blog, tech chatter — dark theme inspired by "Norlin".
   Palette and typography modelled on the Norlin demo
   (#0f0e15 bg, #eee text, #aaa muted, #ff7b7b coral accent, Inter).
   Hand-written; no third-party theme dependency.
------------------------------------------------------------------ */

:root {
  --bg:        #0f0e15;
  --surface:   #17151e;
  --surface-2: #1c1a25;
  --border:    rgba(255, 255, 255, 0.12);
  --border-strong: rgba(255, 255, 255, 0.4);
  --text:      #eee;
  --heading:   #ffffff;
  --muted:     #aaa;
  --accent:    #ff7b7b;
  --accent-2:  #ff6262;
  --radius:    8px;
  --maxw:      820px;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 18px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}
.wrap--wide { max-width: 1140px; }

a { color: var(--accent); text-decoration: none; transition: color 0.15s ease, border-color 0.15s ease; }
a:hover { color: var(--accent-2); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(15, 14, 21, 0.82);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  min-height: 72px;
  padding-top: 12px;
  padding-bottom: 12px;
  flex-wrap: wrap;
}
.nav a {
  position: relative;
  color: var(--text);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.18s ease;
}
.nav a:hover { color: var(--heading); }
.nav a:hover::after { transform: scaleX(1); }

/* ---------- Main ---------- */
.content { padding-top: 60px; padding-bottom: 96px; }

/* ---------- Home hero (centered site title) ---------- */
.home-hero {
  margin: 80px 0 72px;
  text-align: center;
}
.home-hero__title {
  margin: 0 0 14px;
  font-size: clamp(2.4rem, 7vw, 3.75rem);
  line-height: 1.02;
  font-weight: 900;
  letter-spacing: -1.6px;
  color: var(--heading);
}
.home-hero__desc {
  margin: 0 auto;
  max-width: 650px;
  font-size: 1.2rem;
  color: var(--muted);
}

/* ---------- Post cards (home grid) ---------- */
.post-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: #09080f;
  background-size: cover;
  background-position: center;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 16px;
  box-shadow: 0 5px 10px 0 rgba(0, 0, 0, 0.5);
  padding: 32px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 30px 0 rgba(0, 0, 0, 0.6);
  border-color: rgba(255, 123, 123, 0.45);
}
.card-content { position: relative; z-index: 1; display: flex; flex-direction: column; flex: 1 1 auto; }
.card .post-item-title { margin: 14px 0 12px; font-size: 1.5rem; }
.card .excerpt { margin-bottom: 18px; }
.card .tags { margin-top: auto; padding-top: 4px; }
/* Cover-image cards (Norlin style): image fills the card, dark overlay,
   content anchored to the bottom. Posts without an `image:` fall back to
   the plain text card above. */
.card--has-image { min-height: 360px; justify-content: flex-end; }
.card--has-image .card-content { flex: 0 0 auto; margin-top: auto; }
.card-overlay {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(to top, rgba(9, 8, 15, 0.92) 0%, rgba(9, 8, 15, 0.55) 45%, rgba(15, 14, 21, 0.25) 100%);
}
.card--has-image .post-item-title a { color: #fff; }

/* ---------- Post list (tags page) ---------- */
.post-list { list-style: none; margin: 0; padding: 0; }
.post-item { padding: 40px 0; border-bottom: 1px solid var(--border); }
.post-item:first-child { padding-top: 8px; }
.post-item:last-child { border-bottom: 0; }

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.2px;
}
.post-meta .dot { width: 3px; height: 3px; border-radius: 50%; background: var(--accent); display: inline-block; }

.post-item-title { margin: 14px 0 12px; font-size: 1.9rem; line-height: 1.08; font-weight: 700; letter-spacing: -0.6px; }
.post-item-title a { color: var(--heading); }
.post-item-title a:hover { color: var(--accent); }
.excerpt { margin: 0 0 16px; color: var(--muted); font-size: 1rem; }

.post-list.compact .post-item { padding: 10px 0; border: 0; display: flex; gap: 16px; align-items: baseline; }

/* ---------- Tags ---------- */
.tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  display: inline-block;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: -0.5px;
  color: var(--muted);
  border: 2px solid var(--border-strong);
  border-radius: 24px;
  background: transparent;
}
.tag:hover { color: var(--heading); border-color: var(--accent); }
.tag span { color: var(--accent); margin-left: 2px; }

.tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; margin: 28px 0 48px; }
.tag-group { margin: 44px 0; }
.tag-group h2 {
  font-size: 1.5rem; font-weight: 700; letter-spacing: -0.5px;
  padding-bottom: 10px; margin-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.tag-group h2 a, .tag-group h2 { color: var(--heading); }

/* ---------- Post / page ---------- */
.post-hero {
  display: block;
  width: 100%;
  max-height: 440px;
  object-fit: cover;
  border-radius: 16px;
  margin-bottom: 36px;
}
.post-header { margin-bottom: 44px; }
.post-title {
  margin: 16px 0 18px;
  font-size: clamp(2.2rem, 6vw, 3.4rem);
  line-height: 1.02;
  font-weight: 800;
  letter-spacing: -1.4px;
  color: var(--heading);
}
.page-title {
  font-size: clamp(2rem, 5vw, 2.8rem);
  font-weight: 800; letter-spacing: -1px; color: var(--heading);
  margin: 0 0 32px;
}

.post-body { color: var(--muted); font-size: 1.06rem; }
.post-body p { margin: 0 0 1.5em; }
.post-body h1, .post-body h2, .post-body h3,
.post-body h4, .post-body h5, .post-body h6 { color: var(--heading); font-weight: 700; letter-spacing: -0.4px; }
.post-body h1 { font-size: 1.9rem; margin: 1.9em 0 0.6em; }
.post-body h2 { font-size: 1.6rem; margin: 1.9em 0 0.6em; }
.post-body h3 { font-size: 1.32rem; margin: 1.7em 0 0.5em; }
.post-body h4 { font-size: 1.12rem; margin: 1.6em 0 0.4em; }
.post-body h5, .post-body h6 { font-size: 1rem; margin: 1.5em 0 0.4em; }
.post-body h6 { color: var(--accent); }

.post-body a { color: var(--text); border-bottom: 2px solid rgba(238, 238, 238, 0.18); }
.post-body a:hover { color: var(--heading); border-color: var(--accent); }

.post-body ul, .post-body ol { margin: 0 0 1.5em; padding-left: 1.4em; }
.post-body li { margin: 0.35em 0; }
.post-body img { max-width: 100%; height: auto; border-radius: var(--radius); display: block; margin: 1.8em auto; }
.post-body hr { border: 0; border-top: 1px solid var(--border); margin: 2.6em 0; }

.post-body blockquote {
  margin: 1.6em 0;
  padding: 4px 20px;
  border-left: 3px solid var(--accent);
  color: var(--text);
  background: var(--surface);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.post-body blockquote p:last-child { margin-bottom: 0; }

/* ---------- Code ---------- */
code, kbd, pre, samp { font-family: var(--font-mono); }
.post-body :not(pre) > code {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0.12em 0.42em;
  font-size: 0.84em;
  color: #fff;
}
.post-body :not(pre) > code, .post-body a code { border-bottom: 0; }
.post-body pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.6;
  margin: 0 0 1.6em;
}
.post-body pre code { background: none; border: 0; padding: 0; color: var(--text); font-size: inherit; }
.highlight, .highlight pre { background: transparent; margin: 0; }

/* ---------- Contact form ---------- */
.contact-form { margin-top: 32px; max-width: 560px; }
.form-field { margin-bottom: 20px; }
.contact-form label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  color: var(--text);
}
.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form textarea {
  width: 100%;
  padding: 13px 15px;
  font-family: inherit;
  font-size: 1rem;
  color: var(--text);
  background: #09080f;
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.contact-form textarea { resize: vertical; min-height: 140px; }
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: #6f6b80; }
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(255, 123, 123, 0.18);
}
.form-submit {
  display: inline-block;
  padding: 13px 28px;
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: #0f0e15;
  background: var(--accent);
  border: 0;
  border-radius: 24px;
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.15s ease;
}
.form-submit:hover { background: var(--accent-2); transform: translateY(-1px); }
.form-result { margin: 18px 0 0; font-size: 0.95rem; }
.form-result.success { color: var(--accent-2); }
.form-result.error { color: #ff6262; }

/* ---------- Footnotes ---------- */
.footnotes { font-size: 0.92rem; color: var(--muted); border-top: 1px solid var(--border); margin-top: 3.2em; padding-top: 1.2em; }
.footnotes a { color: var(--accent); }
sup[id^="fnref"] a { border-bottom: 0; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); padding: 36px 0; color: var(--muted); font-size: 0.82rem; }
.site-footer-inner { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; justify-content: space-between; }
.site-footer .social { display: flex; gap: 18px; flex-wrap: wrap; }
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--accent); }

/* ---------- Rouge syntax highlighting (dark) ---------- */
.highlight .c, .highlight .c1, .highlight .cm, .highlight .cd { color: #6f6b80; font-style: italic; }
.highlight .k, .highlight .kd, .highlight .kn, .highlight .kp, .highlight .kr, .highlight .kt { color: #ff7b7b; }
.highlight .o, .highlight .ow { color: #ff7b7b; }
.highlight .s, .highlight .s1, .highlight .s2, .highlight .se, .highlight .sb, .highlight .sd, .highlight .sx { color: #9ad19a; }
.highlight .nb, .highlight .bp { color: #f0a35e; }
.highlight .nf, .highlight .fm { color: #d2a8ff; }
.highlight .nc, .highlight .nn, .highlight .nt { color: #f0a35e; }
.highlight .na, .highlight .nv, .highlight .vi, .highlight .vg { color: #c8b3ff; }
.highlight .m, .highlight .mi, .highlight .mf, .highlight .mh, .highlight .il { color: #f0a35e; }
.highlight .gd { color: #ffdcd7; background: #4a1416; }
.highlight .gi { color: #c2f0c2; background: #143a14; }
.highlight .gh { color: #ff7b7b; font-weight: 600; }
.highlight .err { color: #ff6262; }

/* ---------- Responsive ---------- */
@media (max-width: 720px) {
  .post-grid { grid-template-columns: 1fr; gap: 20px; }
  .card { padding: 26px; }
}
@media (max-width: 600px) {
  body { font-size: 16px; }
  .nav { gap: 18px; min-height: 60px; }
  .home-hero { margin: 56px 0 48px; }
  .post-item-title { font-size: 1.45rem; }
  .card .post-item-title { font-size: 1.4rem; }
  .post-list.compact .post-item { flex-direction: column; gap: 2px; }
}