/* ------------------------------------------------------------------
   vsrivastava.com — hand-written, no framework.
   Light palette on bare :root; dark redefines tokens only, so the
   un-stamped "system" state and the explicit data-theme both resolve.
   ------------------------------------------------------------------ */

:root {
  --bg:        #F6F8F7;
  --surface:   #FFFFFF;
  --surface-2: #ECF0EF;
  --ink:       #131A1B;
  --ink-2:     #48555A;
  --ink-3:     #79878B;
  --rule:      #DBE3E1;
  --accent:    #0E5F58;
  --accent-2:  #0A4A44;
  --on-accent: #FFFFFF;
  --shadow:    0 1px 2px rgba(19, 26, 27, .06), 0 6px 20px rgba(19, 26, 27, .05);

  --serif: ui-serif, "Iowan Old Style", Georgia, "Times New Roman", serif;
  --sans:  system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono:  ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;

  --measure: 68ch;
  --gutter: clamp(16px, 4vw, 32px);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:        #0E1414;
    --surface:   #161E1E;
    --surface-2: #1F2A29;
    --ink:       #E4EAE8;
    --ink-2:     #9EACAB;
    --ink-3:     #6E7D7C;
    --rule:      #273433;
    --accent:    #5CC5B9;
    --accent-2:  #8FDCD2;
    --on-accent: #06201E;
    --shadow:    0 1px 2px rgba(0, 0, 0, .4), 0 6px 20px rgba(0, 0, 0, .3);
  }
}

:root[data-theme="dark"] {
  --bg:        #0E1414;
  --surface:   #161E1E;
  --surface-2: #1F2A29;
  --ink:       #E4EAE8;
  --ink-2:     #9EACAB;
  --ink-3:     #6E7D7C;
  --rule:      #273433;
  --accent:    #5CC5B9;
  --accent-2:  #8FDCD2;
  --on-accent: #06201E;
  --shadow:    0 1px 2px rgba(0, 0, 0, .4), 0 6px 20px rgba(0, 0, 0, .3);
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--accent-2); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: -0.012em;
  text-wrap: balance;
  margin: 0;
}
h1 { font-size: clamp(30px, 5vw, 46px); }
h2 { font-size: clamp(24px, 3.4vw, 33px); }
h3 { font-size: 21px; }
h4 { font-size: 18px; }

p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.3em; }
li { margin-bottom: .35em; }

code, kbd {
  font-family: var(--mono);
  font-size: .87em;
  background: var(--surface-2);
  padding: .15em .4em;
  border-radius: 3px;
}
pre {
  font-family: var(--mono);
  font-size: 14px;
  background: var(--surface-2);
  padding: 16px 18px;
  border-radius: 6px;
  overflow-x: auto;
}
pre code { background: none; padding: 0; }

hr { border: 0; border-top: 1px solid var(--rule); margin: 2.5rem 0; }

.eyebrow {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 12px;
}

/* ---------- layout ---------- */

.shell { max-width: 1080px; margin: 0 auto; padding-inline: var(--gutter); }
.prose { max-width: var(--measure); }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: var(--on-accent);
  padding: 10px 16px; z-index: 100; border-radius: 0 0 4px 0;
}
.skip:focus { left: 0; }

/* ---------- header ---------- */

.site-head {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(8px);
  border-bottom: 1px solid var(--rule);
}
@supports not (backdrop-filter: blur(2px)) {
  .site-head { background: var(--bg); }
}
.site-head-inner {
  display: flex; align-items: center; gap: 20px;
  min-height: 60px;
  max-width: 1080px; margin: 0 auto; padding-inline: var(--gutter);
}
.brand {
  font-family: var(--serif);
  font-size: 18px; font-weight: 600;
  color: var(--ink); text-decoration: none;
  white-space: nowrap;
}
.brand:hover { color: var(--ink); }
.site-nav {
  margin-left: auto;
  display: flex; gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.site-nav::-webkit-scrollbar { display: none; }
.site-nav a {
  font-size: 14.5px;
  color: var(--ink-2);
  text-decoration: none;
  padding: 7px 11px;
  border-radius: 5px;
  white-space: nowrap;
}
.site-nav a:hover { color: var(--ink); background: var(--surface-2); }
.site-nav a[aria-current="page"] { color: var(--ink); background: var(--surface-2); }

/* ---------- hero ---------- */

.hero { padding: clamp(56px, 10vw, 108px) 0 clamp(40px, 6vw, 72px); }
.hero-grid {
  display: grid; gap: clamp(24px, 4vw, 48px);
  grid-template-columns: 1fr;
  align-items: start;
}
@media (min-width: 720px) {
  .hero-grid { grid-template-columns: 152px 1fr; }
}
.avatar {
  width: 132px; height: 132px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--rule);
  box-shadow: var(--shadow);
}
.hero h1 { margin-bottom: 10px; }
.hero-role {
  font-size: clamp(17px, 2.1vw, 20px);
  color: var(--ink-2);
  margin: 0 0 6px;
}
.hero-role strong { color: var(--ink); font-weight: 600; }
.hero-sub { color: var(--ink-3); font-size: 15.5px; margin: 0 0 22px; }
.hero-intro { max-width: 56ch; color: var(--ink-2); margin-bottom: 26px; }

.actions { display: flex; flex-wrap: wrap; gap: 10px; }
.btn {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 14.5px; font-weight: 500;
  padding: 10px 18px;
  border-radius: 6px;
  text-decoration: none;
  border: 1px solid var(--rule);
  color: var(--ink);
  background: var(--surface);
  transition: background .15s, border-color .15s, color .15s;
}
.btn:hover { background: var(--surface-2); color: var(--ink); border-color: var(--ink-3); }
.btn-primary {
  background: var(--accent); border-color: var(--accent); color: var(--on-accent);
}
.btn-primary:hover { background: var(--accent-2); border-color: var(--accent-2); color: var(--on-accent); }

/* ---------- sections ---------- */

.section { padding: clamp(44px, 7vw, 84px) 0; border-top: 1px solid var(--rule); }
.section-head { margin-bottom: clamp(24px, 4vw, 40px); }
.section-head h2 { margin-bottom: 8px; }
.section-head p { color: var(--ink-2); max-width: var(--measure); margin: 0; }

/* ---------- skills ---------- */

.skill-grid {
  display: grid; gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(248px, 1fr));
}
.skill {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 18px 20px;
}
.skill h3 { font-family: var(--sans); font-size: 15px; font-weight: 650; margin-bottom: 12px; letter-spacing: 0; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 0; padding: 0; list-style: none; }
.tags li {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-2);
  background: var(--surface-2);
  border-radius: 4px;
  padding: 3px 8px;
  margin: 0;
}

/* ---------- projects ---------- */

.projects { display: grid; gap: 18px; }
.project {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 22px 24px;
}
.project > h3 { margin-bottom: 6px; }
.project .lede { color: var(--ink-2); margin-bottom: 14px; }
.project details { border-top: 1px solid var(--rule); padding-top: 12px; }
.project summary {
  cursor: pointer;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--accent);
  list-style: none;
}
.project summary::-webkit-details-marker { display: none; }
.project summary::after { content: " ▸"; }
.project details[open] summary::after { content: " ▾"; }
.project details > *:not(summary) { margin-top: 12px; }
.project details p { color: var(--ink-2); max-width: var(--measure); }
.project-foot { margin-top: 14px; }

/* ---------- writing / post list ---------- */

.posts { display: grid; gap: 4px; margin: 0; padding: 0; list-style: none; }
.post-row {
  display: block;
  padding: 20px 0;
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
  color: inherit;
}
.post-row:first-child { border-top: 1px solid var(--rule); }
.post-row:hover { color: inherit; }
.post-row:hover h3 { color: var(--accent); }
.post-row time {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--ink-3);
  display: block;
  margin-bottom: 6px;
}
.post-row h3 { margin-bottom: 6px; transition: color .15s; }
.post-row p { color: var(--ink-2); margin: 0; max-width: var(--measure); font-size: 15.5px; }

/* ---------- contact ---------- */

.contact-grid { display: grid; gap: 14px; }
.contact-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.contact-label {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .12em;
  text-transform: uppercase; color: var(--ink-3); min-width: 84px;
}

/* ---------- footer ---------- */

.site-foot {
  border-top: 1px solid var(--rule);
  padding: 34px 0 44px;
  color: var(--ink-3);
  font-size: 14px;
}
.site-foot-inner { display: flex; flex-wrap: wrap; gap: 14px 24px; align-items: baseline; }
.site-foot a { color: var(--ink-2); }
.site-foot a:hover { color: var(--accent); }
.foot-links { display: flex; gap: 16px; margin-left: auto; flex-wrap: wrap; }

/* ---------- article ---------- */

.article { padding: clamp(36px, 6vw, 64px) 0 0; }
.article-head { margin-bottom: clamp(28px, 4vw, 44px); }
.article-head time {
  font-family: var(--mono); font-size: 12px; letter-spacing: .09em;
  text-transform: uppercase; color: var(--ink-3);
  display: block; margin-bottom: 12px;
}
.article-head h1 { margin-bottom: 12px; }
.article-head .standfirst {
  font-size: clamp(17px, 2.2vw, 20px);
  color: var(--ink-2);
  max-width: 60ch;
  margin: 0;
}
.article-body > * { max-width: var(--measure); }
.article-body > figure,
.article-body > .full { max-width: none; }
.article-foot {
  margin-top: clamp(40px, 6vw, 72px);
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  font-size: 15px;
}

/* Posts that ship their own self-contained stylesheet render inside
   .embed, which opts out of the article measure entirely — including for
   its children, which would otherwise inherit the 68ch prose measure. */
.article-body.embed,
.article-body.embed > * { max-width: none; }