/* ==========================================================================
   diagonaldatasets.com — palette lifted directly from the briefing deck
   ========================================================================== */

:root {
  --bg:        #05070D;
  --bg-raise:  #0A0E18;
  --bg-sink:   #03050A;
  --line:      #17203010;
  --border:    #1B2436;
  --border-hi: #2A3852;
  --cyan:      #00F0FF;
  --magenta:   #FF2BD6;
  --text:      #E8F6FF;
  --muted:     #9AAAB8;
  --dim:       #6B7A92;
  --mono: "JetBrains Mono", "Cascadia Code", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --maxw: 74rem;
  --diag: repeating-linear-gradient(45deg, transparent 0 8px, #00F0FF0A 8px 9px);
}

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

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

body {
  margin: 0;
  background: var(--bg);
  background-image:
    radial-gradient(120% 80% at 100% 0%, #00F0FF0D 0%, transparent 55%),
    radial-gradient(90% 70% at 0% 100%, #FF2BD60A 0%, transparent 50%),
    var(--diag);
  background-attachment: fixed;
  color: var(--text);
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.7;
  letter-spacing: 0.01em;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* --- primitives ---------------------------------------------------------- */

.wrap { width: min(var(--maxw), calc(100% - 3rem)); margin-inline: auto; }

a { color: var(--cyan); text-decoration: none; border-bottom: 1px solid #00F0FF44; }
a:hover { border-bottom-color: var(--cyan); background: #00F0FF12; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible {
  outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 2px;
}

h1, h2, h3, h4 { line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 .6em; font-weight: 700; }
h1 { font-size: clamp(2rem, 6vw, 3.4rem); }
h2 { font-size: clamp(1.4rem, 3.4vw, 2rem); }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1.1em; }

hr { border: 0; height: 1px; background: linear-gradient(90deg, var(--border), transparent); margin: 3rem 0; }

code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: #00F0FF12;
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 0.1em 0.38em;
  color: var(--cyan);
}

pre {
  background: var(--bg-sink);
  border: 1px solid var(--border);
  border-left: 2px solid var(--cyan);
  border-radius: 4px;
  padding: 1.1rem 1.3rem;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.6;
  margin: 0 0 1.5rem;
}
pre code { background: none; border: 0; padding: 0; color: var(--text); }
pre .c { color: var(--dim); }
pre .k { color: var(--magenta); }
pre .s { color: var(--cyan); }

blockquote {
  margin: 0 0 1.5rem;
  padding: .2rem 0 .2rem 1.3rem;
  border-left: 2px solid var(--magenta);
  color: var(--muted);
  font-style: italic;
}

ul, ol { padding-left: 1.3rem; margin: 0 0 1.2rem; }
li { margin-bottom: .45rem; }
li::marker { color: var(--cyan); }

table { width: 100%; border-collapse: collapse; margin: 0 0 1.6rem; font-size: .85rem; }
th, td { text-align: left; padding: .6rem .8rem; border-bottom: 1px solid var(--border); }
th { color: var(--cyan); text-transform: uppercase; letter-spacing: .1em; font-size: .72rem; }
td { color: var(--muted); }
.scroller { overflow-x: auto; margin-bottom: 1.6rem; }
.scroller table { margin-bottom: 0; }

.eyebrow {
  font-size: .7rem; text-transform: uppercase; letter-spacing: .3em;
  color: var(--cyan); margin: 0 0 1rem;
}
.eyebrow--m { color: var(--magenta); }
.lede { font-size: 1.05rem; color: var(--muted); max-width: 62ch; }
.dim { color: var(--dim); }

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

.masthead {
  position: sticky; top: 0; z-index: 50;
  background: #05070DE6;
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.masthead .wrap { display: flex; align-items: center; gap: 1.5rem; height: 60px; }

.brand { display: flex; align-items: center; gap: .7rem; border: 0; color: var(--text); font-weight: 700; letter-spacing: -.02em; }
.brand:hover { background: none; }
.brand .glyph {
  width: 22px; height: 22px; flex: none;
  border: 1px solid var(--cyan);
  background: linear-gradient(45deg, transparent calc(50% - 1px), var(--cyan) 50%, transparent calc(50% + 1px));
}
.brand .glyph--sm { width: 16px; height: 16px; }

.nav { margin-left: auto; display: flex; gap: 1.4rem; align-items: center; flex-wrap: wrap; }
.nav a { border: 0; color: var(--muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .12em; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--cyan); background: none; }

@media (max-width: 780px) {
  .masthead .wrap { height: auto; padding-block: .8rem; flex-wrap: wrap; gap: .8rem; }
  .nav { margin-left: 0; width: 100%; gap: 1rem; }
  .nav a { font-size: .72rem; }
}

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

.hero { padding: clamp(4rem, 12vw, 8rem) 0 4rem; position: relative; overflow: hidden; }
.hero h1 { font-size: clamp(2.6rem, 10vw, 6rem); margin-bottom: .3em; }
.hero h1 .b { display: block; color: var(--cyan); text-shadow: 0 0 40px #00F0FF55; }
.hero .lede { font-size: clamp(1rem, 2.4vw, 1.3rem); }
.hero .stamp {
  display: inline-block; margin-bottom: 2rem; padding: .3rem .8rem;
  border: 1px solid var(--magenta); color: var(--magenta);
  font-size: .68rem; letter-spacing: .28em; text-transform: uppercase;
}

.cta-row { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 2.4rem; }
.btn {
  display: inline-block; padding: .7rem 1.4rem; border: 1px solid var(--cyan);
  color: var(--cyan); background: #00F0FF0D; font-size: .78rem;
  text-transform: uppercase; letter-spacing: .16em; font-weight: 700;
}
.btn:hover { background: var(--cyan); color: var(--bg); }
.btn--ghost { border-color: var(--border-hi); color: var(--muted); background: none; }
.btn--ghost:hover { border-color: var(--text); color: var(--text); background: none; }

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

.section { padding: 4rem 0; border-top: 1px solid var(--border); }
.section--flush { border-top: 0; }

.grid { display: grid; gap: 1px; background: var(--border); border: 1px solid var(--border); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid > .cell { background: var(--bg-raise); padding: 1.6rem; }
.cell h3 { color: var(--text); margin-bottom: .5rem; }
.cell p:last-child { margin-bottom: 0; }
.cell .num { color: var(--magenta); font-size: .72rem; letter-spacing: .2em; display: block; margin-bottom: .8rem; }
@media (max-width: 860px) { .grid--3, .grid--2 { grid-template-columns: 1fr; } }

.orient { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.orient article { border: 1px solid var(--border); padding: 1.4rem; background: var(--bg-raise); }
.orient article.is-true { border-color: var(--cyan); box-shadow: 0 0 40px #00F0FF14 inset; }
.orient h3 { letter-spacing: .18em; font-size: .82rem; text-transform: uppercase; color: var(--dim); }
.orient article.is-true h3 { color: var(--cyan); }
.orient ul { list-style: none; padding: 0; margin: 1rem 0 0; font-size: .82rem; color: var(--muted); }
.orient li { border-top: 1px solid var(--border); padding: .5rem 0; margin: 0; }
@media (max-width: 860px) { .orient { grid-template-columns: 1fr; } }

/* --- post lists ---------------------------------------------------------- */

.postlist { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--border); }
.postlist li { margin: 0; border-bottom: 1px solid var(--border); }
.postlist a { display: block; padding: 1.4rem .4rem; border: 0; color: var(--text); }
.postlist a:hover { background: #00F0FF0A; padding-left: 1rem; transition: padding .16s ease, background .16s ease; }
.postlist .meta { font-size: .7rem; color: var(--dim); letter-spacing: .16em; text-transform: uppercase; }
.postlist h3 { margin: .35rem 0 .3rem; font-size: 1.05rem; }
.postlist a:hover h3 { color: var(--cyan); }
.postlist p { margin: 0; color: var(--muted); font-size: .85rem; max-width: 70ch; }

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

.article { padding: 3.5rem 0 5rem; }
.article .body { max-width: 68ch; }
.article .body h2 { margin-top: 2.6rem; }
.article .body h3 { margin-top: 2rem; color: var(--cyan); }
.article .body img { max-width: 100%; }
.byline { color: var(--dim); font-size: .75rem; letter-spacing: .14em; text-transform: uppercase; margin-bottom: 2.5rem; }

.footnote { font-size: .8rem; color: var(--dim); border-top: 1px solid var(--border); padding-top: 1.2rem; margin-top: 3rem; }

/* --- lab / demo ---------------------------------------------------------- */

.lab { display: grid; grid-template-columns: 260px 1fr; gap: 1.6rem; align-items: start; }
@media (max-width: 860px) { .lab { grid-template-columns: 1fr; } }

.controls { border: 1px solid var(--border); background: var(--bg-raise); padding: 1.3rem; }
.controls label { display: block; font-size: .68rem; text-transform: uppercase; letter-spacing: .18em; color: var(--dim); margin: 1.1rem 0 .4rem; }
.controls label:first-of-type { margin-top: 0; }
.controls output { color: var(--cyan); float: right; }
.controls input[type="range"] { width: 100%; accent-color: var(--cyan); }

.matrix { border: 1px solid var(--border); background: var(--bg-sink); padding: 1rem; overflow: auto; }
.matrix svg { display: block; width: 100%; height: auto; }
.readout { margin-top: 1rem; font-size: .78rem; color: var(--muted); display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: .6rem 1.4rem; }
.readout b { color: var(--cyan); font-weight: 400; }

/* --- benchmarks ---------------------------------------------------------- */

.bar { display: grid; grid-template-columns: 12rem 1fr 5.5rem; gap: 1rem; align-items: center; margin-bottom: .7rem; font-size: .8rem; }
.bar .track { height: 14px; background: var(--bg-sink); border: 1px solid var(--border); position: relative; }
.bar .fill { position: absolute; inset: 0 auto 0 0; background: linear-gradient(90deg, #00F0FF33, var(--cyan)); }
.bar.is-diag .fill { background: linear-gradient(90deg, #FF2BD633, var(--magenta)); }
.bar .val { text-align: right; color: var(--muted); }
@media (max-width: 620px) { .bar { grid-template-columns: 1fr; gap: .3rem; } .bar .val { text-align: left; } }

/* --- forms --------------------------------------------------------------- */

.signup { display: flex; gap: .6rem; flex-wrap: wrap; margin-top: 1.4rem; }
.signup input {
  flex: 1 1 18rem; background: var(--bg-sink); border: 1px solid var(--border-hi);
  color: var(--text); font-family: var(--mono); font-size: .85rem; padding: .7rem .9rem;
}
.signup input::placeholder { color: var(--dim); }
.signup button {
  border: 1px solid var(--cyan); background: #00F0FF0D; color: var(--cyan);
  font-family: var(--mono); font-size: .78rem; text-transform: uppercase;
  letter-spacing: .16em; font-weight: 700; padding: .7rem 1.4rem; cursor: pointer;
}
.signup button:hover { background: var(--cyan); color: var(--bg); }
.signup-result { font-size: .82rem; color: var(--magenta); margin-top: .9rem; min-height: 1.4em; }

/* --- people -------------------------------------------------------------- */

.people { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1px; background: var(--border); border: 1px solid var(--border); }
.person { background: var(--bg-raise); padding: 1.5rem; }
.person .avatar {
  width: 46px; height: 46px; margin-bottom: 1rem; border: 1px solid var(--border-hi);
  background: linear-gradient(45deg, transparent calc(50% - 2px), var(--cyan) 50%, transparent calc(50% + 2px)), var(--bg-sink);
}
.person h3 { margin-bottom: .1rem; font-size: .98rem; }
.person .role { color: var(--magenta); font-size: .72rem; text-transform: uppercase; letter-spacing: .14em; margin-bottom: .9rem; }
.person p { font-size: .84rem; color: var(--muted); margin: 0; }

/* --- jobs ---------------------------------------------------------------- */

.job { border: 1px solid var(--border); background: var(--bg-raise); padding: 1.5rem; margin-bottom: 1rem; }
.job h3 { margin-bottom: .2rem; }
.job .tags { font-size: .7rem; color: var(--dim); letter-spacing: .14em; text-transform: uppercase; margin-bottom: .9rem; }
.job p:last-child { margin-bottom: 0; }

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

.footer { border-top: 1px solid var(--border); margin-top: 5rem; padding: 3rem 0 4rem; font-size: .8rem; color: var(--dim); }
.footer .cols { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2rem; margin-bottom: 2.5rem; }
.footer h4 { font-size: .68rem; text-transform: uppercase; letter-spacing: .2em; color: var(--muted); margin-bottom: .9rem; }
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { margin-bottom: .5rem; }
.footer a { color: var(--dim); border: 0; }
.footer a:hover { color: var(--cyan); background: none; }
.footer .fine { border-top: 1px solid var(--border); padding-top: 1.5rem; line-height: 1.8; }
@media (max-width: 780px) { .footer .cols { grid-template-columns: 1fr 1fr; } }

/* --- 404 ----------------------------------------------------------------- */

.notfound { padding: 8rem 0; text-align: center; }
.notfound .code { font-size: clamp(4rem, 18vw, 10rem); color: var(--cyan); line-height: 1; text-shadow: 0 0 60px #00F0FF44; }

/* --- misc ---------------------------------------------------------------- */

.two-col { align-items: start; }
@media (max-width: 860px) { .two-col { grid-template-columns: 1fr !important; } }

.hero h1 .b { margin-top: .05em; }
.notfound .lede { max-width: 58ch; }