@import url("https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=DM+Mono:wght@300;400;500&family=Syne:wght@400;600;700;800&display=swap");

/* ─── Design Tokens ─────────────────────────────────────── */
:root {
  --bg: #0a0a0b;
  --surface: #111113;
  --surface-2: #18181c;
  --border: #232328;
  --border-soft: rgba(255, 255, 255, 0.06);
  --text: #e8e8e4;
  --text-dim: #7a7a80;
  --text-muted: #3e3e46;
  --accent: #c8f23a; /* electric lime – sharp single accent */
  --accent-dim: rgba(200, 242, 58, 0.12);
  --accent-glow: rgba(200, 242, 58, 0.08);
  --serif: "Instrument Serif", Georgia, serif;
  --sans: "Syne", system-ui, sans-serif;
  --mono: "DM Mono", ui-monospace, monospace;
  --radius: 4px;
  --max-w: 720px;
  --transition: 150ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 4rem 2rem 6rem;
  background-color: var(--bg);
  background-image:
    radial-gradient(
      ellipse 80% 50% at 50% -20%,
      rgba(200, 242, 58, 0.05) 0%,
      transparent 60%
    ),
    url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23ffffff' fill-opacity='0.015'%3E%3Ccircle cx='1' cy='1' r='1'/%3E%3C/g%3E%3C/svg%3E");
  color: var(--text);
  font-family: var(--serif);
  line-height: 1.8;
  font-size: 19px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body > * {
  max-width: var(--max-w);
  margin-left: auto;
  margin-right: auto;
}

/* ─── Headings ──────────────────────────────────────────── */
h1,
h2,
h3,
h4 {
  font-family: var(--sans);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  scroll-margin-top: 1.5rem;
  color: #f0f0ec;
}

h1 {
  font-size: clamp(2.2rem, 5vw, 3rem);
  font-weight: 800;
  margin-bottom: 1.2rem;
  /* Subtle accent underline on the first line */
  background: linear-gradient(135deg, #f0f0ec 60%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h2 {
  font-size: 1.5rem;
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  color: var(--text);
}

h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-top: 2.2rem;
  color: var(--text);
}

/* ─── Paragraphs ────────────────────────────────────────── */
p {
  margin: 1.4rem 0;
  color: #c8c8c4;
  font-size: 1.2rem;
}

/* Drop cap for first paragraph after h1 */
h1 + p::first-letter {
  font-family: var(--serif);
  font-size: 3.6rem;
  font-style: italic;
  float: left;
  line-height: 0.82;
  margin: 0.08em 0.1em 0 0;
  color: var(--accent);
}

/* ─── Article Meta / Byline ─────────────────────────────── */
.meta,
time,
.byline {
  display: block;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 2.5rem;
}

/* ─── Links ─────────────────────────────────────────────── */
a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  transition:
    color var(--transition),
    border-color var(--transition);
}

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

/* ─── Lists ─────────────────────────────────────────────── */
ul,
ol {
  margin: 1.4rem 0 1.4rem 0;
  padding-left: 0;
  list-style: none;
}

ul li,
ol li {
  position: relative;
  padding-left: 1.5rem;
  margin: 0.55rem 0;
  color: #c8c8c4;
}

ul li::before {
  content: "–";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-family: var(--mono);
}

ol {
  counter-reset: ol-counter;
}

ol li {
  counter-increment: ol-counter;
}

ol li::before {
  content: counter(ol-counter, decimal-leading-zero);
  position: absolute;
  left: 0;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  top: 0.22em;
}

/* ─── Horizontal Rule ───────────────────────────────────── */
hr {
  border: none;
  margin: 3.5rem auto;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--border) 20%,
    var(--border) 80%,
    transparent
  );
  position: relative;
}

hr::after {
  content: "✦";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  font-size: 0.65rem;
  color: var(--text-muted);
  background: var(--bg);
  padding: 0 0.5rem;
}

/* ─── Blockquote ────────────────────────────────────────── */
blockquote {
  margin: 2.5rem 0;
  padding: 1.5rem 1.8rem;
  background: var(--surface);
  border-left: 2px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  position: relative;
}

blockquote p {
  margin: 0;
  font-style: italic;
  font-size: 1.1rem;
  color: #d8d8d4;
}

blockquote cite {
  display: block;
  margin-top: 0.8rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  font-style: normal;
}

/* ─── Tables ────────────────────────────────────────────── */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 0.9rem;
  font-family: var(--mono);
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}

thead {
  background: var(--surface-2);
}

th {
  text-align: left;
  padding: 0.75rem 1rem;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border);
  font-weight: 500;
}

td {
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--border-soft);
  color: #c0c0bc;
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background: var(--border-soft);
}

/* ─── Inline Code ───────────────────────────────────────── */
code {
  font-family: var(--mono);
  font-size: 0.83rem;
  background: var(--surface-2);
  color: var(--accent);
  padding: 0.18rem 0.4rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  word-break: break-word;
}

/* ─── Code Blocks ───────────────────────────────────────── */
pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 2px solid var(--accent);
  padding: 1.4rem 1.6rem;
  overflow-x: auto;
  border-radius: var(--radius);
  margin: 2rem 0;
  position: relative;
}

pre::before {
  content: attr(data-lang);
  position: absolute;
  top: 0.6rem;
  right: 0.8rem;
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

pre code {
  background: none;
  border: none;
  padding: 0;
  color: #d0d0cc;
  font-size: 0.87rem;
  line-height: 1.65;
}

/* ─── Images ────────────────────────────────────────────── */
img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin: 2rem auto;
}

figure {
  margin: 2.5rem 0;
}

figcaption {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  text-align: center;
  margin-top: 0.75rem;
  letter-spacing: 0.04em;
}

/* ─── Footnotes / Aside ─────────────────────────────────── */
aside,
.note,
.callout {
  background: var(--accent-dim);
  border: 1px solid rgba(200, 242, 58, 0.2);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  margin: 2rem 0;
  font-size: 0.88rem;
  color: #c0c0bc;
}

aside strong,
.callout strong {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  display: block;
  margin-left: 3px;
  margin-bottom: 0.4rem;
}

/* ─── Tags / Badges ─────────────────────────────────────── */
.tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  color: var(--text-dim);
  margin-right: 0.4rem;
  text-decoration: none;
  border-bottom: none;
  transition: all var(--transition);
}

.tag:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

/* ─── Navigation ─────────────────────────────────────────  */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 0 3rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 3.5rem;
}

nav .logo {
  font-family: var(--sans);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  color: var(--text);
  border-bottom: none;
}

nav .logo span {
  color: var(--accent);
}

nav ul {
  display: flex;
  gap: 2rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

nav ul li {
  padding: 0;
  margin: 0;
}

nav ul li::before {
  display: none;
}

nav a {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  border-bottom: none;
  transition: color var(--transition);
}

nav a:hover {
  color: var(--accent);
  border-bottom: none;
}

/* ─── Footer ─────────────────────────────────────────────  */
footer {
  margin-top: 5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ─── Reading Progress Bar ───────────────────────────────  */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  background: var(--accent);
  z-index: 999;
  transform-origin: left;
  width: 0%;
  box-shadow: 0 0 8px var(--accent-glow);
  transition: width 0.1s linear;
}

/* ─── Selection ──────────────────────────────────────────  */
::selection {
  background: rgba(200, 242, 58, 0.2);
  color: var(--text);
}

/* ─── Scrollbar ──────────────────────────────────────────  */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ─── Abbr ───────────────────────────────────────────────  */
abbr[title] {
  border-bottom: 1px dotted var(--text-dim);
  cursor: help;
  text-decoration: none;
}

/* ─── Responsive ─────────────────────────────────────────  */
@media (max-width: 700px) {
  body {
    padding: 2rem 1.2rem 4rem;
    font-size: 17px;
  }

  h1 {
    font-size: 2rem;
  }
  h2 {
    font-size: 1.35rem;
  }

  nav ul {
    gap: 1.2rem;
  }
  nav {
    flex-wrap: wrap;
    gap: 1rem;
  }
  footer {
    flex-direction: column;
    text-align: center;
  }
}

/* ─── Focus Accessibility ────────────────────────────────  */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius);
}