/* ==========================================================================
   Technology, Changing Life — deep-space editorial theme
   Single stylesheet. No external assets, no web fonts, no images.
   ========================================================================== */

/* --- Design tokens ------------------------------------------------------ */

:root {
  /* deep space surfaces */
  --bg:          #05070e;
  --bg-2:        #080c16;
  --surface:     #0b1020;
  --surface-2:   #101728;
  --border:      #1a2338;
  --border-hi:   #2b3a5c;

  /* type */
  --text:        #e8eefc;
  --text-dim:    #93a3c2;
  --text-faint:  #64728f;

  /* signal colours */
  --accent:      #4dd8f0;
  --accent-2:    #a78bfa;
  --accent-deep: #1d6d85;
  --accent-wash: rgba(77, 216, 240, .10);
  --accent-line: rgba(77, 216, 240, .35);
  --glow:        rgba(77, 216, 240, .28);
  --glow-2:      rgba(167, 139, 250, .22);

  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
          "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
          "Liberation Mono", monospace;

  --measure: 68ch;
  --wrap: 1160px;
  --radius: 12px;
}

/* --- Base --------------------------------------------------------------- */

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

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

body {
  margin: 0;
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  position: relative;
  overflow-x: hidden;
}

/* nebula + starfield, painted once behind everything */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background-color: var(--bg);
  background-image:
    radial-gradient(60rem 40rem at 12% -6%,  rgba(61, 110, 220, .16), transparent 60%),
    radial-gradient(52rem 36rem at 92% 2%,   rgba(167, 139, 250, .13), transparent 60%),
    radial-gradient(70rem 44rem at 50% 108%, rgba(77, 216, 240, .09),  transparent 60%);
}
body::after {
  content: "";
  position: fixed; inset: 0; z-index: -1; pointer-events: none; opacity: .55;
  background-image:
    radial-gradient(1px 1px at 24px 38px,   rgba(255,255,255,.55), transparent),
    radial-gradient(1px 1px at 148px 92px,  rgba(200,225,255,.40), transparent),
    radial-gradient(1px 1px at 76px 196px,  rgba(255,255,255,.30), transparent),
    radial-gradient(1px 1px at 210px 164px, rgba(190,215,255,.45), transparent),
    radial-gradient(1.4px 1.4px at 268px 46px, rgba(255,255,255,.35), transparent),
    radial-gradient(1px 1px at 320px 250px, rgba(180,210,255,.28), transparent);
  background-size: 360px 300px;
}

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

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: #8fecff; }

h1, h2, h3, h4 {
  font-family: var(--sans); line-height: 1.18; margin: 0;
  font-weight: 650; letter-spacing: -.022em;
}

::selection { background: rgba(77, 216, 240, .28); color: #fff; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: 22px; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: #04121a; padding: 10px 16px; z-index: 100;
  border-radius: 0 0 8px 0; font-size: 14px; font-weight: 700;
}
.skip-link:focus { left: 0; color: #04121a; }

/* --- Header ------------------------------------------------------------- */

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(5, 7, 14, .78);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--border);
}
.site-header::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-line) 22%, var(--glow-2) 60%, transparent);
  opacity: .8;
}

.site-header .wrap { display: flex; align-items: center; gap: 18px; min-height: 68px; }

.brand {
  display: inline-flex; align-items: center; gap: 11px;
  color: var(--text); text-decoration: none; font-weight: 650;
  letter-spacing: -.015em; font-size: 16.5px;
}
.brand:hover { color: var(--text); }
.brand-name { white-space: nowrap; }

.brand-mark {
  width: 30px; height: 30px; flex: none; border-radius: 8px;
  background:
    radial-gradient(circle at 30% 25%, rgba(255,255,255,.35), transparent 55%),
    linear-gradient(140deg, var(--accent), #3b82f6 55%, var(--accent-2));
  box-shadow: 0 0 0 1px rgba(77,216,240,.35), 0 0 18px -2px var(--glow);
  position: relative;
}
.brand-mark::after {
  content: ""; position: absolute; inset: 8px;
  border: 1.5px solid rgba(5, 12, 24, .85); border-radius: 50%;
  border-top-color: transparent; border-bottom-color: transparent;
  transform: rotate(28deg);
}

.site-nav { margin-left: auto; display: flex; align-items: center; gap: 2px; flex-wrap: wrap; }
.site-nav a {
  color: var(--text-dim); text-decoration: none;
  font-size: 14px; font-weight: 500; letter-spacing: .01em;
  padding: 7px 12px; border-radius: 7px;
}
.site-nav a:hover { color: var(--text); background: rgba(255,255,255,.05); }
.site-nav a[aria-current="page"] {
  color: var(--accent); background: var(--accent-wash);
  box-shadow: inset 0 0 0 1px rgba(77,216,240,.22);
}

/* --- Generic bits ------------------------------------------------------- */

.eyebrow {
  font-family: var(--mono);
  font-size: 11.5px; font-weight: 500; letter-spacing: .18em;
  text-transform: uppercase; color: var(--accent);
  margin: 0 0 16px; display: flex; align-items: center; gap: 10px;
}
.eyebrow::before {
  content: ""; width: 26px; height: 1px; flex: none;
  background: linear-gradient(90deg, var(--accent), transparent);
}

.tag {
  display: inline-block; font-family: var(--mono);
  font-size: 11px; font-weight: 500; letter-spacing: .14em; text-transform: uppercase;
  color: var(--accent); background: var(--accent-wash);
  padding: 5px 10px; border-radius: 5px; text-decoration: none;
  box-shadow: inset 0 0 0 1px rgba(77,216,240,.20);
}
.tag:hover { color: #8fecff; background: rgba(77,216,240,.16); }

.meta {
  font-family: var(--mono); font-size: 12.5px; color: var(--text-faint);
  display: flex; align-items: center; gap: 9px; flex-wrap: wrap; letter-spacing: .02em;
}
.meta .dot { opacity: .5; }

.section-head {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 20px; flex-wrap: wrap;
  padding-top: 18px; margin-bottom: 32px; position: relative;
}
.section-head::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-2) 18%, var(--border) 45%, transparent);
}
.section-head h2 { font-size: 25px; }
.section-head p { margin: 0; color: var(--text-dim); font-size: 14.5px; max-width: 48ch; }

/* --- Hero --------------------------------------------------------------- */

.hero { padding: 82px 0 58px; position: relative; }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(rgba(120, 160, 255, .055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 160, 255, .055) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(70% 80% at 30% 20%, #000 10%, transparent 72%);
  -webkit-mask-image: radial-gradient(70% 80% at 30% 20%, #000 10%, transparent 72%);
}
.hero h1 {
  font-size: clamp(38px, 6.4vw, 68px); font-weight: 680;
  letter-spacing: -.035em; max-width: 17ch; margin-bottom: 22px;
  background: linear-gradient(180deg, #ffffff 20%, #a9bede 130%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .lede {
  font-size: clamp(16.5px, 1.9vw, 19.5px); color: var(--text-dim);
  max-width: 62ch; margin: 0 0 34px; line-height: 1.65;
}
.hero-stats {
  display: flex; gap: 0; flex-wrap: wrap;
  border-top: 1px solid var(--border); padding-top: 0;
}
.hero-stats div {
  padding: 24px 34px 4px 0; margin-right: 34px;
  border-right: 1px solid var(--border);
}
.hero-stats div:last-child { border-right: 0; margin-right: 0; }
.hero-stats strong {
  display: block; font-family: var(--mono); font-size: 27px; font-weight: 500;
  color: var(--accent); letter-spacing: -.02em; text-shadow: 0 0 22px var(--glow);
}
.hero-stats span { font-size: 13px; color: var(--text-faint); }

.divider { height: 1px; background: var(--border); border: 0; margin: 0; }

/* --- Card artwork ------------------------------------------------------- */

.card-art, .article-art {
  position: relative; overflow: hidden; border-radius: var(--radius);
  background-color: #080f1f;
  background-image:
    radial-gradient(115% 105% at 18% 10%, var(--c1, rgba(77,216,240,.6)), transparent 62%),
    radial-gradient(100% 100% at 88% 94%, var(--c2, rgba(167,139,250,.5)), transparent 66%);
  box-shadow: inset 0 0 0 1px var(--border-hi);
}
.card-art { aspect-ratio: 16 / 9; }

/* scan grid + corner bracket */
.card-art::after, .article-art::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.055) 1px, transparent 1px),
    radial-gradient(circle at 22% 20%, rgba(255,255,255,.16), transparent 45%);
  background-size: 28px 28px, 28px 28px, 100% 100%;
}
.card-art::before, .article-art::before {
  content: ""; position: absolute; left: 14px; top: 14px; width: 18px; height: 18px;
  border-left: 1px solid rgba(255,255,255,.45); border-top: 1px solid rgba(255,255,255,.45);
  z-index: 1;
}

.art-living   { --c1: rgba(255,150,90,.62); --c2: rgba(126,86,255,.50); }
.art-work     { --c1: rgba(86,160,255,.62); --c2: rgba(56,72,225,.52); }
.art-health   { --c1: rgba(56,235,190,.54); --c2: rgba(28,120,200,.52); }
.art-mobility { --c1: rgba(168,124,255,.60); --c2: rgba(56,88,235,.50); }
.art-money    { --c1: rgba(245,200,86,.52); --c2: rgba(196,92,52,.48); }
.art-energy   { --c1: rgba(76,224,246,.60); --c2: rgba(36,110,210,.52); }
.art-learning { --c1: rgba(255,104,140,.54); --c2: rgba(150,48,200,.50); }
.art-access   { --c1: rgba(104,192,255,.60); --c2: rgba(78,88,235,.50); }
.art-privacy  { --c1: rgba(150,180,230,.42); --c2: rgba(52,76,130,.58); }
.art-food     { --c1: rgba(168,232,88,.50); --c2: rgba(34,150,128,.52); }

/* --- Featured ----------------------------------------------------------- */

.featured {
  display: grid; grid-template-columns: 1.04fr .96fr; gap: 46px; align-items: center;
  padding: 56px 0;
}
.featured .card-art { aspect-ratio: 4 / 3; }
.featured h3 { font-size: clamp(27px, 3.5vw, 38px); margin: 18px 0 16px; letter-spacing: -.03em; }
.featured h3 a { color: var(--text); text-decoration: none; }
.featured h3 a:hover { color: var(--accent); }
.featured p { color: var(--text-dim); margin: 0 0 20px; font-size: 16.5px; }

/* --- Card grid ---------------------------------------------------------- */

.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 34px 28px; }

.card { display: flex; flex-direction: column; gap: 14px; }
.card .card-art { transition: transform .32s ease, box-shadow .32s ease; }
.card:hover .card-art {
  transform: translateY(-4px);
  box-shadow: inset 0 0 0 1px rgba(77,216,240,.55), 0 16px 40px -12px var(--glow);
}
.card h3 { font-size: 20px; }
.card h3 a { color: var(--text); text-decoration: none; }
.card h3 a:hover { color: var(--accent); }
.card p { margin: 0; color: var(--text-dim); font-size: 14.8px; line-height: 1.62; }
.card .tag { align-self: flex-start; }

.read-more {
  font-family: var(--mono); font-size: 13px; font-weight: 500; letter-spacing: .06em;
  text-transform: uppercase; text-decoration: none;
  display: inline-flex; align-items: center; gap: 8px;
}
.read-more::after { content: "→"; transition: transform .2s ease; }
.read-more:hover::after { transform: translateX(4px); }

/* --- Topics ------------------------------------------------------------- */

.topics { padding: 64px 0; border-top: 1px solid var(--border); margin-top: 64px; }
.topic-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.topic {
  background: linear-gradient(180deg, var(--surface), rgba(11,16,32,.4));
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px 20px; position: relative; overflow: hidden;
  transition: border-color .25s ease, transform .25s ease;
}
.topic::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-line), transparent);
  opacity: 0; transition: opacity .25s ease;
}
.topic:hover { border-color: var(--border-hi); transform: translateY(-2px); }
.topic:hover::before { opacity: 1; }
.topic h3 { font-size: 16.5px; margin-bottom: 8px; }
.topic p { margin: 0; font-size: 13.6px; color: var(--text-dim); line-height: 1.55; }
.topic .num {
  font-family: var(--mono); font-size: 11.5px; color: var(--accent);
  letter-spacing: .14em; display: block; margin-bottom: 12px; opacity: .85;
}

/* --- Editorial note ----------------------------------------------------- */

.editorial-note {
  display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: center;
  margin: 68px 0 78px; padding: 38px;
  background: linear-gradient(135deg, rgba(11,16,32,.9), rgba(16,23,40,.55));
  border: 1px solid var(--border); border-radius: var(--radius);
  position: relative; overflow: hidden;
}
.editorial-note::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(40rem 20rem at 100% 0%, var(--glow-2), transparent 65%);
  opacity: .5;
}
.editorial-note > div { position: relative; }
.editorial-note h2 { font-size: 24px; margin-bottom: 14px; }
.editorial-note p { margin: 0 0 12px; color: var(--text-dim); font-size: 15.4px; }
.editorial-note p:last-child { margin-bottom: 0; }

/* --- Article ------------------------------------------------------------ */

.article-hero { padding: 56px 0 36px; }
.article-hero .tag { margin-bottom: 20px; }
.article-hero h1 {
  font-size: clamp(31px, 5.2vw, 52px); font-weight: 680; letter-spacing: -.035em;
  max-width: 20ch; margin-bottom: 22px;
  background: linear-gradient(180deg, #ffffff 25%, #adc0df 125%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.article-hero .dek {
  font-size: clamp(16.5px, 1.9vw, 19.5px); line-height: 1.6;
  color: var(--text-dim); max-width: 60ch; margin: 0 0 28px;
}
.article-art { aspect-ratio: 32 / 9; margin-top: 36px; }

.article-body { max-width: var(--measure); margin: 0; padding: 46px 0 22px; }

.article-body p { font-size: 17.5px; line-height: 1.78; margin: 0 0 25px; color: #d7e0f2; }
.article-body > p:first-of-type { font-size: 19px; color: var(--text); }
.article-body > p:first-of-type::first-letter {
  float: left; font-family: var(--mono); font-size: 56px; line-height: .9;
  padding: 6px 12px 0 0; color: var(--accent); font-weight: 500;
  text-shadow: 0 0 26px var(--glow);
}
.article-body h2 {
  font-size: 26px; margin: 52px 0 18px; padding-left: 16px; position: relative;
}
.article-body h2::before {
  content: ""; position: absolute; left: 0; top: .18em; bottom: .18em; width: 2px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 12px var(--glow);
}
.article-body h3 { font-size: 19.5px; margin: 36px 0 12px; color: var(--text); }
.article-body ul, .article-body ol {
  font-size: 17.5px; line-height: 1.72; padding-left: 22px; margin: 0 0 25px; color: #d7e0f2;
}
.article-body li { margin-bottom: 12px; }
.article-body li::marker { color: var(--accent); }
.article-body strong { font-weight: 650; color: var(--text); }
.article-body em { color: #eaf1ff; }

.article-body blockquote {
  margin: 38px 0; padding: 22px 26px;
  border: 1px solid var(--border); border-left: 2px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: linear-gradient(90deg, var(--accent-wash), transparent 70%);
  font-size: 20px; line-height: 1.5; color: var(--text);
}
.article-body blockquote p { font-size: inherit; margin: 0; color: inherit; }

.stat-row {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
  margin: 38px 0; padding: 26px;
  background: linear-gradient(180deg, var(--surface), rgba(11,16,32,.35));
  border: 1px solid var(--border); border-radius: var(--radius);
}
.stat-row strong {
  display: block; font-family: var(--mono); font-size: 25px; font-weight: 500;
  letter-spacing: -.02em; color: var(--accent); margin-bottom: 6px;
  text-shadow: 0 0 24px var(--glow);
}
.stat-row span { font-size: 13px; color: var(--text-faint); line-height: 1.5; display: block; }

.takeaways {
  margin: 48px 0 8px; padding: 28px 30px;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(16,23,40,.9), rgba(11,16,32,.5));
  position: relative; overflow: hidden;
}
.takeaways::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2) 45%, transparent);
}
.takeaways h2 {
  font-family: var(--mono); font-size: 12px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--accent); margin: 0 0 16px; padding: 0; font-weight: 500;
}
.takeaways h2::before { display: none; }
.takeaways ul { margin: 0; padding-left: 20px; font-size: 15.2px; line-height: 1.62; }
.takeaways li { margin-bottom: 11px; color: var(--text-dim); }
.takeaways li:last-child { margin-bottom: 0; }
.takeaways strong { color: var(--text); }

.article-foot {
  max-width: var(--measure); margin: 34px 0 0; padding: 24px 0 0;
  border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  font-family: var(--mono); font-size: 12.5px; color: var(--text-faint);
}

.related { padding: 64px 0 20px; border-top: 1px solid var(--border); margin-top: 58px; }

/* --- Simple pages ------------------------------------------------------- */

.page-hero { padding: 66px 0 30px; }
.page-hero h1 {
  font-size: clamp(32px, 5vw, 50px); font-weight: 680; letter-spacing: -.035em; margin-bottom: 20px;
  background: linear-gradient(180deg, #ffffff 25%, #adc0df 125%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.page-hero p { font-size: 18px; color: var(--text-dim); max-width: 62ch; margin: 0; }

.prose { max-width: var(--measure); padding: 22px 0 44px; }
.prose p { font-size: 16.5px; margin: 0 0 20px; color: var(--text-dim); line-height: 1.75; }
.prose h2 { font-size: 22px; margin: 44px 0 16px; color: var(--text); }
.prose ul { padding-left: 22px; color: var(--text-dim); margin: 0 0 20px; font-size: 16.5px; }
.prose li { margin-bottom: 10px; }
.prose strong { color: var(--text); font-weight: 650; }

/* --- Footer ------------------------------------------------------------- */

.site-footer {
  margin-top: 84px; border-top: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(8,12,22,.7), rgba(5,7,14,.95));
  padding: 54px 0 36px;
}
.footer-grid {
  display: grid; grid-template-columns: 1.7fr 1fr 1fr 1fr; gap: 34px;
  padding-bottom: 34px; border-bottom: 1px solid var(--border);
}
.footer-grid h4 {
  font-family: var(--mono); font-size: 11px; letter-spacing: .18em;
  text-transform: uppercase; color: var(--text-faint); margin-bottom: 15px; font-weight: 500;
}
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 10px; }
.footer-grid a { color: var(--text-dim); text-decoration: none; font-size: 14.2px; }
.footer-grid a:hover { color: var(--accent); }
.footer-about p { margin: 14px 0 0; color: var(--text-faint); font-size: 14.2px; max-width: 42ch; }
.footer-bottom {
  padding-top: 22px; display: flex; justify-content: space-between; gap: 16px;
  flex-wrap: wrap; font-family: var(--mono); font-size: 12.2px; color: var(--text-faint);
}

/* --- Responsive --------------------------------------------------------- */

@media (max-width: 960px) {
  .featured { grid-template-columns: 1fr; gap: 26px; padding: 42px 0; }
  .featured .card-art { aspect-ratio: 16 / 9; order: -1; }
  .card-grid { grid-template-columns: repeat(2, 1fr); gap: 30px 22px; }
  .topic-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .editorial-note { grid-template-columns: 1fr; gap: 20px; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .hero { padding: 52px 0 38px; }
  .hero-stats div { padding: 20px 22px 4px 0; margin-right: 22px; }
  .card-grid { grid-template-columns: 1fr; }
  .topic-grid { grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: 1fr; }
  .brand-name { font-size: 14.5px; white-space: normal; }
  .site-nav a { padding: 6px 9px; font-size: 13px; }
  .article-body p, .article-body ul, .article-body ol { font-size: 16.8px; }
  .article-body > p:first-of-type { font-size: 17.6px; }
  .article-art { aspect-ratio: 16 / 9; }
  .editorial-note { padding: 24px; }
  .article-foot { font-size: 11.5px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}