/* Azarel Robotics — blog + article styles. Pairs with tokens.css. */

* { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

:root {
  --ink: #0b0d0f;
  --ink-2: #454c54;
  --ink-3: #737c85;
  --rule: rgba(11, 13, 15, 0.12);
  --rule-soft: rgba(11, 13, 15, 0.07);
  --surface: #ffffff;
  --radius: 14px;
}

body {
  background: var(--surface);
  color: var(--ink);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.wrap { max-width: 1280px; margin: 0 auto; padding: 0 40px; }
.wrap-narrow { max-width: 760px; margin: 0 auto; padding: 0 40px; }

.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11.5px; letter-spacing: 0.16em; text-transform: uppercase;
}

/* ===== top bar ===== */
.top {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.93);
  border-bottom: 1px solid var(--rule-soft);
}
@supports (backdrop-filter: blur(10px)) {
  @media (hover: hover) { .top { backdrop-filter: blur(10px); } }
}
.top-in {
  max-width: 1280px; margin: 0 auto; padding: 16px 40px;
  display: flex; align-items: center; justify-content: space-between; gap: 28px;
}
.brand { display: flex; align-items: center; gap: 11px; font-weight: 600; letter-spacing: 0.04em; }
.brand img { width: 26px; height: 26px; }
.top-nav { display: flex; align-items: center; gap: 28px; }
.top-nav a { font-size: 14px; color: var(--ink-2); transition: color 200ms ease; }
.top-nav a:hover, .top-nav a.on { color: var(--ink); }
.top-cta {
  padding: 10px 18px; border-radius: 100px;
  background: var(--ink); color: #fff;
  font-size: 13.5px; font-weight: 500;
  display: inline-flex; align-items: center; gap: 8px;
  transition: background 220ms ease, transform 220ms ease;
}
.top-cta:hover { background: var(--accent); transform: translateY(-1px); }

/* ===== index masthead ===== */
.head { padding: 64px 0 40px; }
.head-eyebrow { color: var(--accent); }
.head h1 {
  font-size: clamp(38px, 5.6vw, 76px); font-weight: 600;
  letter-spacing: -0.04em; line-height: 1.02; margin: 20px 0 0; max-width: 16ch;
}
.head p { margin: 22px 0 0; max-width: 58ch; font-size: 17px; line-height: 1.62; color: var(--ink-2); }

/* ===== featured (no photograph: typographic, dark) ===== */
.feature {
  display: block; border-radius: 18px; overflow: hidden;
  background:
    radial-gradient(120% 120% at 86% 8%, rgba(13,170,242,0.2) 0%, rgba(13,170,242,0) 58%),
    linear-gradient(152deg, #101821 0%, #0a0e13 58%, #070a0e 100%);
  color: #e9eef3; padding: 54px 48px 48px;
  border: 1px solid rgba(255,255,255,0.08);
  transition: transform 420ms cubic-bezier(.22,.61,.36,1), box-shadow 420ms ease;
}
.feature:hover { transform: translateY(-3px); box-shadow: 0 40px 80px -46px rgba(6,22,34,0.7); }
.feature .mono { color: var(--accent); }
.feature h2 {
  font-size: clamp(28px, 4vw, 52px); font-weight: 600;
  letter-spacing: -0.035em; line-height: 1.07; margin: 22px 0 0; max-width: 20ch;
}
.feature p { margin: 20px 0 0; max-width: 64ch; font-size: 16.5px; line-height: 1.62; color: #93a0ac; }
.feature-meta {
  margin-top: 30px; padding-top: 22px;
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex; gap: 22px; align-items: center;
  color: #6f7c88;
}
.feature-go { margin-left: auto; color: var(--accent); }

/* ===== second post row ===== */
.row2 {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 40px; align-items: center; margin-top: 22px;
  padding: 26px; border: 1px solid var(--rule-soft); border-radius: 18px;
  transition: border-color 300ms ease, transform 300ms ease;
}
.row2:hover { border-color: var(--accent); transform: translateY(-2px); }
.row2 img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; border-radius: 11px; }
.row2 .mono { color: var(--accent); }
.row2 h2 {
  font-size: clamp(22px, 2.7vw, 34px); font-weight: 600;
  letter-spacing: -0.03em; line-height: 1.14; margin: 16px 0 0;
}
.row2 p { margin: 14px 0 0; font-size: 15.5px; line-height: 1.62; color: var(--ink-2); }
.row2 .meta { margin-top: 20px; color: var(--ink-3); }

/* ===== notify band ===== */
.notify {
  margin-top: 74px; border-radius: 18px; overflow: hidden;
  background:
    radial-gradient(120% 120% at 88% 10%, rgba(13,170,242,0.2) 0%, rgba(13,170,242,0) 60%),
    linear-gradient(150deg, #101821 0%, #0a0e13 60%, #070a0e 100%);
  color: #e9eef3; padding: 44px;
  display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 34px; align-items: center;
}
.notify h2 { font-size: clamp(21px, 2.5vw, 32px); font-weight: 500; letter-spacing: -0.028em; }
.notify p { margin: 12px 0 0; color: #8894a0; font-size: 15.5px; line-height: 1.6; max-width: 54ch; }
.notify-btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 15px 26px; border-radius: 100px;
  background: var(--accent); color: #fff; font-weight: 500; font-size: 15px; white-space: nowrap;
  transition: transform 220ms ease, box-shadow 220ms ease;
}
.notify-btn:hover { transform: translateY(-2px); box-shadow: 0 14px 30px -12px rgba(13,170,242,0.7); }

/* ===== article ===== */
.crumb { padding: 30px 0 0; color: var(--ink-3); font-size: 13.5px; }
.crumb a:hover { color: var(--accent); }
.art-head { padding: 26px 0 40px; border-bottom: 1px solid var(--rule); }
.art-head .mono { color: var(--accent); }
.art-head h1 {
  font-size: clamp(32px, 4.4vw, 56px); font-weight: 600;
  letter-spacing: -0.038em; line-height: 1.06; margin: 18px 0 0;
}
.art-dek { margin: 20px 0 0; font-size: 18.5px; line-height: 1.58; color: var(--ink-2); }
.art-meta { margin-top: 26px; display: flex; gap: 20px; color: var(--ink-3); flex-wrap: wrap; }

.art-body { padding: 40px 0 0; font-size: 17.5px; line-height: 1.72; color: #1b2025; }
.art-body p { margin: 0 0 24px; }
.art-body h2 {
  font-size: clamp(22px, 2.6vw, 30px); font-weight: 600;
  letter-spacing: -0.026em; line-height: 1.2; margin: 46px 0 18px;
}
.art-body h3 { font-size: 19px; font-weight: 600; letter-spacing: -0.018em; margin: 34px 0 12px; }
.art-body ul { margin: 0 0 24px; padding-left: 20px; }
.art-body li { margin: 0 0 10px; }
.art-body strong { font-weight: 600; }
.art-body a { color: var(--accent); border-bottom: 1px solid rgba(13,170,242,0.35); }
.art-body a:hover { border-bottom-color: var(--accent); }

.art-note {
  margin: 34px 0; padding: 22px 24px;
  border-left: 2px solid var(--accent); background: #f6fbfe;
  font-size: 16px; line-height: 1.62; color: var(--ink-2);
}
.art-fig { margin: 36px 0; }
.art-fig img { width: 100%; border-radius: 12px; }
.art-fig figcaption { margin-top: 12px; font-size: 13.5px; color: var(--ink-3); line-height: 1.55; }

.art-sources {
  margin-top: 54px; padding-top: 26px; border-top: 1px solid var(--rule);
  font-size: 14.5px; line-height: 1.68; color: var(--ink-3);
}
.art-sources h2 { font-size: 13px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-3); margin: 0 0 14px; font-weight: 600; }
.art-sources li { margin-bottom: 8px; }
.art-sources a { color: var(--ink-2); }
.art-sources a:hover { color: var(--accent); }

.art-next {
  margin-top: 46px; padding: 28px; border: 1px solid var(--rule-soft); border-radius: 14px;
  transition: border-color 260ms ease;
}
.art-next:hover { border-color: var(--accent); }
.art-next .mono { color: var(--ink-3); }
.art-next h3 { font-size: 21px; font-weight: 600; letter-spacing: -0.022em; margin-top: 10px; }

/* ===== footer ===== */
footer { margin-top: 86px; border-top: 1px solid var(--rule); padding: 50px 0 40px; }
.foot { display: grid; grid-template-columns: minmax(0, 1.6fr) repeat(2, minmax(0, 1fr)); gap: 40px; }
.foot p { color: var(--ink-3); font-size: 14.5px; line-height: 1.6; max-width: 46ch; margin-top: 14px; }
.foot h4 { font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 14px; }
.foot a { display: block; font-size: 14.5px; color: var(--ink-2); padding: 5px 0; transition: color 200ms ease; }
.foot a:hover { color: var(--accent); }
.foot-bottom {
  margin-top: 44px; padding-top: 22px; border-top: 1px solid var(--rule-soft);
  display: flex; justify-content: space-between; gap: 20px; color: var(--ink-3); font-size: 13.5px;
}

/* ===== reveal ===== */
.up { transition: opacity 760ms cubic-bezier(.22,.61,.36,1), transform 760ms cubic-bezier(.22,.61,.36,1); }
.js .up { opacity: 0; transform: translateY(26px); }
.js .up.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js .up { opacity: 1; transform: none; transition: none; }
  .feature, .row2 { transition: none; }
  html { scroll-behavior: auto; }
}

/* ===== responsive ===== */
@media (max-width: 900px) {
  .wrap, .wrap-narrow, .top-in { padding-left: 22px; padding-right: 22px; }

  /* nav moves to its own scrollable row rather than disappearing */
  .top-in { flex-wrap: wrap; row-gap: 12px; padding-bottom: 10px; }
  .brand { order: 1; }
  .top-cta { order: 2; padding: 9px 15px; font-size: 13px; }
  .top-nav {
    order: 3; width: 100%; gap: 20px;
    overflow-x: auto; scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    margin: 0 -22px; padding: 2px 22px 4px;
  }
  .top-nav::-webkit-scrollbar { display: none; }
  .top-nav a { white-space: nowrap; font-size: 13.5px; padding: 4px 0; }
  .top-nav a.on { box-shadow: inset 0 -1px 0 var(--accent); }
  .head { padding: 42px 0 28px; }
  .feature { padding: 34px 24px 30px; }
  .feature-meta { flex-wrap: wrap; gap: 12px; }
  .feature-go { margin-left: 0; }
  .row2 { grid-template-columns: 1fr; gap: 22px; padding: 18px; }
  .notify { grid-template-columns: 1fr; padding: 30px 24px; gap: 22px; margin-top: 56px; }
  .art-body { font-size: 17px; }
  .foot { grid-template-columns: 1fr 1fr; gap: 28px; }
  .foot-brand { grid-column: 1 / -1; }
}
@media (max-width: 620px) {
  .foot-bottom { flex-direction: column; gap: 8px; }
  .art-note { padding: 18px; }
}

/* ===== phone tier ===== */
@media (max-width: 600px) {
  .wrap, .wrap-narrow, .top-in { padding-left: 18px; padding-right: 18px; }
  .top-nav { margin: 0 -18px; padding: 2px 18px 4px; }

  .head { padding: 34px 0 24px; }
  .head h1 { font-size: clamp(32px, 9.5vw, 46px); }
  .head p { font-size: 16px; margin-top: 18px; }

  .feature { padding: 26px 20px 24px; border-radius: 14px; }
  .feature h2 { font-size: clamp(25px, 7.4vw, 36px); margin-top: 16px; }
  .feature p { font-size: 15.5px; margin-top: 16px; }
  .feature-meta { margin-top: 22px; padding-top: 18px; font-size: 10.5px; letter-spacing: 0.12em; }

  .row2 { padding: 14px; border-radius: 14px; gap: 18px; }
  .row2 h2 { font-size: clamp(21px, 6vw, 28px); }
  .row2 p { font-size: 15px; }

  .notify { padding: 26px 20px; border-radius: 14px; }
  .notify-btn { width: 100%; justify-content: center; padding: 14px 20px; }

  /* article */
  .crumb { padding-top: 22px; font-size: 12.5px; }
  .art-head { padding: 20px 0 28px; }
  .art-head h1 { font-size: clamp(28px, 8.2vw, 40px); }
  .art-dek { font-size: 17px; margin-top: 16px; }
  .art-meta { margin-top: 20px; gap: 14px; font-size: 10.5px; letter-spacing: 0.12em; }
  .art-body { padding-top: 30px; font-size: 16.5px; line-height: 1.68; }
  .art-body p { margin-bottom: 20px; }
  .art-body h2 { margin: 36px 0 14px; font-size: clamp(21px, 6vw, 26px); }
  .art-body h3 { margin: 28px 0 10px; font-size: 18px; }
  .art-note { margin: 26px 0; padding: 16px 18px; font-size: 15.5px; }
  .art-sources { margin-top: 42px; font-size: 14px; }
  .art-next { padding: 20px; margin-top: 36px; }
  .art-next h3 { font-size: 18.5px; line-height: 1.32; }

  footer { margin-top: 62px; padding: 38px 0 32px; }
  .foot { grid-template-columns: 1fr; gap: 26px; }
}

/* hover affordances mean nothing on touch, and can stick after a tap */
@media (hover: none) {
  .feature:hover, .row2:hover, .notify-btn:hover, .top-cta:hover { transform: none; box-shadow: none; }
  .row2:hover { border-color: var(--rule-soft); }
  .art-next:hover { border-color: var(--rule-soft); }
  .top-cta:hover { background: var(--ink); }
}

/* ===== scenario card grid ===== */
.sec { padding: 72px 0 0; }
.sec-head {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 30px; padding-bottom: 20px; border-bottom: 1px solid var(--rule);
}
.sec-head h2 { font-size: clamp(22px, 2.5vw, 32px); font-weight: 600; letter-spacing: -0.028em; }
.sec-head .mono { color: var(--ink-3); }

.grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 34px 26px; padding-top: 32px; }
.card img {
  width: 100%; aspect-ratio: 16 / 10; object-fit: cover; border-radius: 11px;
  transition: transform 800ms cubic-bezier(.22,.61,.36,1);
}
.card:hover img { transform: translateY(-4px); }
.card .mono { display: block; color: var(--accent); margin: 16px 0 8px; }
.card h3 {
  font-size: 18.5px; font-weight: 500; letter-spacing: -0.018em; line-height: 1.3;
  transition: color 220ms ease;
}
.card:hover h3 { color: var(--accent); }
.card p { margin: 9px 0 0; font-size: 14.5px; line-height: 1.58; color: var(--ink-3); }

@media (max-width: 1040px) { .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 900px) { .sec { padding-top: 52px; } }
@media (max-width: 620px) { .grid { grid-template-columns: 1fr; gap: 28px; } }
@media (hover: none) { .card:hover img { transform: none; } }