/* coldsmoke // styles.css
   Single stylesheet for the multi-page site. Brand tokens up top.
   v2.0 — Apr 2026 */

/* ============================================================
   TOKENS
   ============================================================ */
:root {
  --ink: #0A0A0A;
  --paper: #FAFAFA;
  --slate: #6B7280;
  --slate-strong: #4B5563;
  --mist: #E5E7EB;
  --fog: #F3F4F6;
  --accent: #2563EB;
  --accent-pressed: #1D4ED8;
  --grey-mid: #374151;
  --grey-light: #9CA3AF;

  --font-display: "Lato", "Helvetica Neue", "Arial", sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-serif: "Source Serif Pro", "Georgia", serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --radius-sm: 4px;
  --radius: 8px;
  --radius-lg: 12px;

  --max: 1280px;
  --gutter: 24px;
}

/* ============================================================
   RESET / BASE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; height: auto; }

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 120ms ease;
}
a:hover { border-bottom-color: var(--accent); }

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

/* ============================================================
   LAYOUT PRIMITIVES
   ============================================================ */
.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section { padding: 96px 0; }
.section--tight { padding: 64px 0; }

@media (max-width: 720px) {
  .section { padding: 64px 0; }
  .section--tight { padding: 48px 0; }
}

/* ============================================================
   TYPE
   ============================================================ */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.014em;
  line-height: 1.1;
  margin: 0 0 16px;
  color: var(--ink);
}

h1 { font-size: clamp(40px, 6vw, 64px); }
h2 { font-size: clamp(28px, 4vw, 39px); }
h3 { font-size: clamp(22px, 3vw, 28px); }
h4 { font-size: 20px; font-weight: 700; }

p { margin: 0 0 16px; max-width: 70ch; }

.lead {
  font-family: var(--font-serif);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.5;
  color: var(--slate-strong);
  font-style: italic;
  margin: 0 0 32px;
  max-width: 56ch;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--slate);
  margin: 0 0 16px;
}

.mono { font-family: var(--font-mono); }
.serif { font-family: var(--font-serif); font-style: italic; }
.muted { color: var(--slate); }
.accent { color: var(--accent); }

/* ============================================================
   NAV (shared header)
   ============================================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 250, 250, 0.94);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--mist);
}

.nav__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 16px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__brand {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  letter-spacing: -0.014em;
  color: var(--ink);
  border-bottom: none;
}
.nav__brand .accent { color: var(--accent); }

.nav__links {
  display: flex;
  gap: 28px;
  font-family: var(--font-mono);
  font-size: 13px;
  align-items: center;
}
.nav__links a {
  color: var(--slate);
  border-bottom: none;
}
.nav__links a:hover { color: var(--ink); }
.nav__links a[aria-current="page"] {
  color: var(--ink);
  font-weight: 500;
}

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  flex-shrink: 0;
}
.nav__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: opacity 150ms ease;
}

@media (max-width: 600px) {
  .nav__toggle { display: flex; }
  .nav__links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(250, 250, 250, 0.98);
    backdrop-filter: saturate(180%) blur(8px);
    border-bottom: 1px solid var(--mist);
    flex-direction: column;
    gap: 0;
    padding: 8px 0;
    z-index: 49;
  }
  .nav__links.is-open { display: flex; }
  .nav__links a {
    padding: 12px var(--gutter);
    font-size: 14px;
    border-bottom: none;
  }
}

/* ============================================================
   HERO (dark)
   ============================================================ */
.hero {
  background: var(--ink);
  color: var(--paper);
  padding: 120px 0 0;
  position: relative;
  overflow: hidden;
}

.hero__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
  position: relative;
  z-index: 2;
}

.hero__eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--slate);
  margin: 0 0 32px;
}
.hero__eyebrow .sep { color: var(--accent); margin: 0 8px; }

.hero h1 {
  color: var(--paper);
  font-size: clamp(48px, 8vw, 88px);
  margin: 0 0 24px;
}
.hero h1 .accent { color: var(--accent); }

.hero__sub {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(18px, 2.4vw, 24px);
  color: var(--grey-light);
  max-width: 52ch;
  margin: 0 0 40px;
}

.hero__cta {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 14px 22px;
  border-radius: var(--radius-sm);
  transition: background 120ms ease;
}
.hero__cta:hover {
  background: var(--accent);
  color: var(--paper);
  border-bottom-color: var(--accent);
}

.hero__illus {
  position: relative;
  margin-top: 80px;
  height: 240px;
  overflow: hidden;
}
.hero__illus svg { width: 100%; height: 100%; opacity: 0.7; }

/* Page hero (lighter) for non-home pages */
.page-hero {
  padding: 80px 0 48px;
  border-bottom: 1px solid var(--mist);
  position: relative;
  overflow: hidden;
}
.page-hero .eyebrow { margin-bottom: 12px; }

.page-hero__illus {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.page-hero__illus svg { width: 100%; height: 100%; }

/* ============================================================
   CARDS / GRID
   ============================================================ */
.grid {
  display: grid;
  gap: 24px;
}
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }

@media (max-width: 900px) {
  .grid--3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .grid--3, .grid--2 { grid-template-columns: 1fr; }
}

.card {
  background: var(--paper);
  border: 1px solid var(--mist);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 120ms ease;
}
.card:hover { border-color: var(--ink); }

.card .num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 12px;
}
.card h3 {
  font-size: 22px;
  margin-bottom: 8px;
}
.card p {
  font-size: 15px;
  color: var(--slate-strong);
  margin: 0;
}

/* ============================================================
   WORK / WRITING LIST
   ============================================================ */
.entry {
  padding: 32px 0;
  border-bottom: 1px solid var(--mist);
}
.entry:first-of-type { padding-top: 0; }

.entry__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate);
  margin-bottom: 8px;
}
.entry__meta .sep { color: var(--accent); margin: 0 8px; }

.entry__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 28px;
  letter-spacing: -0.014em;
  margin: 0 0 8px;
}
.entry__title a {
  color: var(--ink);
  border-bottom: none;
}
.entry__title a:hover { color: var(--accent); }

.entry__excerpt {
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--slate-strong);
  max-width: 64ch;
  margin: 0;
}

.entry__tech {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.entry__tech .tech {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--slate);
  border: 1px solid var(--mist);
  padding: 4px 10px;
  border-radius: 4px;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--ink);
  color: var(--grey-light);
  padding: 64px 0 32px;
  margin-top: 96px;
  position: relative;
  overflow: hidden;
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
@media (max-width: 720px) {
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 480px) {
  .footer__grid { grid-template-columns: 1fr; gap: 24px; }
}

.footer__brand {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 28px;
  color: var(--paper);
  letter-spacing: -0.014em;
}
.footer__brand .accent { color: var(--accent); }

.footer__tag {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--grey-light);
  margin: 12px 0 24px;
}

.footer__col h4 {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--slate);
  font-weight: 400;
  margin: 0 0 16px;
}
.footer__col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer__col li {
  font-size: 14px;
  margin-bottom: 8px;
}
.footer__col a {
  color: var(--grey-light);
  border-bottom: none;
}
.footer__col a:hover { color: var(--paper); }

.footer__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--slate);
  padding-top: 24px;
  border-top: 1px solid var(--grey-mid);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

/* ============================================================
   SECTION HEADERS
   ============================================================ */
.section-head {
  margin-bottom: 48px;
  max-width: 64ch;
}

/* ============================================================
   CONTACT BLOCK
   ============================================================ */
.contact-block {
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--radius);
  padding: 64px;
  margin: 64px auto 0;
  max-width: 880px;
}
.contact-block h2 { color: var(--paper); margin-bottom: 16px; }
.contact-block p { color: var(--grey-light); margin-bottom: 32px; }
.contact-block .email {
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--accent);
  border-bottom: 1px solid transparent;
  padding-bottom: 4px;
}
.contact-block .email:hover { border-bottom-color: var(--accent); }

@media (max-width: 600px) {
  .contact-block { padding: 40px 24px; }
}

/* ============================================================
   UTILITIES
   ============================================================ */
/* ============================================================
   BLOG POST
   ============================================================ */
.blog-post { font-size: 17px; line-height: 1.7; color: var(--ink); }
.blog-post h2 { font-size: clamp(24px, 3.5vw, 32px); margin: 48px 0 16px; }
.blog-post h3 { font-size: clamp(20px, 2.5vw, 24px); margin: 40px 0 12px; }
.blog-post h4 { font-size: 18px; margin: 32px 0 8px; }
.blog-post p { max-width: 70ch; margin-bottom: 20px; }
.blog-post ul, .blog-post ol { max-width: 70ch; margin-bottom: 20px; padding-left: 24px; }
.blog-post li { margin-bottom: 8px; }
.blog-post blockquote {
  border-left: 3px solid var(--accent);
  margin: 32px 0;
  padding: 12px 24px;
  color: var(--slate-strong);
  font-style: italic;
}
.blog-post code {
  font-family: var(--font-mono);
  font-size: 14px;
  background: var(--fog);
  padding: 2px 6px;
  border-radius: 3px;
}
.blog-post pre {
  background: var(--ink);
  color: var(--paper);
  padding: 24px;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 24px 0;
}
.blog-post pre code {
  background: none;
  padding: 0;
  color: inherit;
}
.blog-post hr { border: none; border-top: 1px solid var(--mist); margin: 48px 0; }
.blog-post strong { color: var(--ink); font-weight: 600; }
.blog-post a { color: var(--accent); border-bottom: 1px solid transparent; }
.blog-post a:hover { border-bottom-color: var(--accent); }
.blog-post table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 15px; }
.blog-post th, .blog-post td { padding: 10px 14px; border-bottom: 1px solid var(--mist); text-align: left; }
.blog-post th { font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--slate); font-weight: 500; }

/* ============================================================
   UTILITIES
   ============================================================ */
.hairline { border: none; border-top: 1px solid var(--mist); margin: 48px 0; }
.text-center { text-align: center; }
.mb-0 { margin-bottom: 0; }
.mb-32 { margin-bottom: 32px; }
.mt-48 { margin-top: 48px; }