/* ============================================================================
   AWS Weekly Brief — awssec.de
   Editorial-technical "dispatch" aesthetic.
   Squid-ink masthead + sharp orange rule · IBM Plex (sans/mono) + Newsreader.
   ========================================================================== */

:root {
  /* Brand */
  --navy: #232f3e;        /* AWS squid ink */
  --navy-deep: #161e27;
  --navy-soft: #2e3d4f;
  --orange: #ff9900;      /* AWS orange */
  --orange-deep: #ec7211;

  /* Reading surface (warm, not stark white) */
  --paper: #fbfaf7;
  --surface: #ffffff;
  --ink: #1d262e;
  --muted: #5d6b76;
  --line: rgba(35, 47, 62, 0.14);
  --line-strong: rgba(35, 47, 62, 0.30);
  --code-bg: #f1efe9;

  /* Type */
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", "Menlo", monospace;
  --serif: "Newsreader", Georgia, "Times New Roman", serif;

  /* Layout */
  --measure: 40rem;       /* reading column */
  --wide: 64rem;          /* page max width */
  --gutter: clamp(1.25rem, 5vw, 3rem);

  --shadow: 0 1px 2px rgba(22, 30, 39, 0.04), 0 12px 32px -16px rgba(22, 30, 39, 0.22);
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #11171d;
    --surface: #18212a;
    --ink: #e8ecef;
    --muted: #94a3ae;
    --line: rgba(232, 236, 239, 0.13);
    --line-strong: rgba(232, 236, 239, 0.28);
    --code-bg: #0e151b;
    --navy: #1b2530;
    --navy-deep: #0d141a;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 16px 40px -20px rgba(0, 0, 0, 0.6);
  }
}

/* --- Reset / base ---------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

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

body {
  font-family: var(--serif);
  font-size: clamp(1.05rem, 0.6vw + 0.95rem, 1.18rem);
  line-height: 1.68;
  color: var(--ink);
  background: var(--paper);
  font-optical-sizing: auto;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

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

::selection { background: var(--orange); color: var(--navy); }

:focus-visible {
  outline: 2.5px solid var(--orange);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0.5rem;
  z-index: 100;
  background: var(--navy);
  color: #fff;
  padding: 0.6rem 1rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  border-radius: 6px;
}
.skip-link:focus { left: 0.5rem; }

/* --- Masthead -------------------------------------------------------------- */
.masthead {
  background: var(--navy);
  color: #f4f6f8;
  border-bottom: 3px solid var(--orange);
  /* faint engineered grid texture */
  background-image:
    radial-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 22px 22px;
  background-position: -11px -11px;
}

.masthead__inner {
  max-width: var(--wide);
  margin-inline: auto;
  padding: clamp(1.1rem, 3vw, 1.6rem) var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.brand { text-decoration: none; display: grid; gap: 0.25rem; line-height: 1; }
.brand__kicker {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--orange);
}
.brand__name {
  font-family: var(--sans);
  font-weight: 700;
  font-size: clamp(1.25rem, 1.4vw + 1rem, 1.6rem);
  letter-spacing: -0.018em;
  color: #fff;
}

.nav {
  display: flex;
  gap: clamp(1rem, 2.5vw, 1.9rem);
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.nav a {
  text-decoration: none;
  color: #cdd6df;
  padding-block: 0.35rem;
  position: relative;
  transition: color 0.18s var(--ease);
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: -2px;
  height: 2px;
  background: var(--orange);
  transition: right 0.25s var(--ease);
}
.nav a:hover, .nav a:focus-visible { color: #fff; }
.nav a:hover::after, .nav a:focus-visible::after { right: 0; }
.nav__ext { margin-left: 0.15em; }

/* --- Main layout ----------------------------------------------------------- */
.main {
  flex: 1;
  width: 100%;
  max-width: var(--wide);
  margin-inline: auto;
  padding: clamp(2.5rem, 6vw, 4.5rem) var(--gutter);
}

.eyebrow {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}
.eyebrow a { color: inherit; text-decoration: none; }
.eyebrow a:hover { color: var(--orange-deep); }

/* --- Homepage intro -------------------------------------------------------- */
.intro { max-width: var(--measure); margin-bottom: clamp(2.5rem, 6vw, 4rem); }
.intro__title {
  font-family: var(--sans);
  font-weight: 700;
  font-size: clamp(2.7rem, 7vw, 4.5rem);
  line-height: 0.98;
  letter-spacing: -0.035em;
  color: var(--ink);
  margin: 0.7rem 0 0.9rem;
}
.intro__lede {
  font-size: 1.2rem;
  color: var(--muted);
  max-width: 34rem;
}

/* --- Lead (featured latest) ----------------------------------------------- */
.lead {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
  overflow: hidden;
  margin-bottom: clamp(2.5rem, 6vw, 3.5rem);
}
.lead::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: linear-gradient(var(--orange), var(--orange-deep));
}
.lead__link {
  display: block;
  text-decoration: none;
  color: inherit;
  padding: clamp(1.6rem, 4vw, 2.6rem) clamp(1.6rem, 4vw, 2.8rem);
  transition: background 0.2s var(--ease);
}
.lead__link:hover { background: color-mix(in srgb, var(--orange) 5%, transparent); }
.lead__tag {
  position: absolute;
  top: clamp(1.2rem, 3vw, 1.8rem);
  right: clamp(1.4rem, 3vw, 2.2rem);
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--orange-deep);
}
.lead__date {
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.lead__title {
  font-family: var(--sans);
  font-weight: 600;
  font-size: clamp(1.7rem, 3.5vw, 2.5rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0.5rem 0 0.7rem;
  max-width: 24ch;
}
.lead__desc { color: var(--muted); font-size: 1.12rem; max-width: 52ch; }

.readcue {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  margin-top: 1.3rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--orange-deep);
  font-weight: 500;
}
.readcue span { transition: transform 0.22s var(--ease); }
.lead__link:hover .readcue span { transform: translateX(5px); }

/* --- Earlier briefs list --------------------------------------------------- */
.section-label {
  font-family: var(--mono);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  padding-bottom: 0.9rem;
  margin-bottom: 0.4rem;
  border-bottom: 1px solid var(--line-strong);
}

.briefs { list-style: none; padding: 0; }
.brief-item { border-bottom: 1px solid var(--line); }
.brief-item__link {
  display: grid;
  grid-template-columns: 7.5rem 1fr auto;
  align-items: baseline;
  gap: 0.5rem 1.6rem;
  text-decoration: none;
  color: inherit;
  padding: 1.5rem 0.75rem 1.5rem 0.5rem;
  border-radius: 8px;
  transition: background 0.18s var(--ease), padding-left 0.22s var(--ease);
}
.brief-item__link:hover {
  background: color-mix(in srgb, var(--orange) 6%, transparent);
  padding-left: 1rem;
}
.brief-item__date {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  color: var(--muted);
  padding-top: 0.35rem;
}
.brief-item__title {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1.28rem;
  letter-spacing: -0.012em;
  line-height: 1.25;
  display: block;
  transition: color 0.18s var(--ease);
}
.brief-item__link:hover .brief-item__title { color: var(--orange-deep); }
.brief-item__desc {
  display: block;
  color: var(--muted);
  font-size: 1.02rem;
  margin-top: 0.3rem;
  max-width: 56ch;
}
.brief-item__cue {
  font-family: var(--mono);
  color: var(--line-strong);
  align-self: center;
  transition: color 0.18s var(--ease), transform 0.22s var(--ease);
}
.brief-item__link:hover .brief-item__cue {
  color: var(--orange);
  transform: translateX(4px);
}

.empty { color: var(--muted); font-size: 1.15rem; }

/* --- Brief / page article -------------------------------------------------- */
.brief, .page { max-width: var(--measure); margin-inline: auto; }
.brief__head { margin-bottom: clamp(2rem, 5vw, 3rem); }
.brief__head .eyebrow { margin-bottom: 1.5rem; }
.brief__date {
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  color: var(--orange-deep);
  text-transform: uppercase;
}
.brief__title {
  font-family: var(--sans);
  font-weight: 700;
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.06;
  letter-spacing: -0.028em;
  margin: 0.6rem 0 0;
  color: var(--ink);
}
.brief__standfirst {
  font-size: 1.28rem;
  line-height: 1.5;
  color: var(--muted);
  margin-top: 1.1rem;
  font-style: italic;
}

/* --- Prose (Markdown body) ------------------------------------------------- */
.prose { font-size: 1.16rem; }
.prose > * + * { margin-top: 1.35rem; }
.prose h2, .prose h3 {
  font-family: var(--sans);
  letter-spacing: -0.015em;
  line-height: 1.2;
  margin-top: 2.6rem;
  scroll-margin-top: 1.5rem;
}
.prose h2 { font-size: 1.6rem; font-weight: 600; }
.prose h3 { font-size: 1.3rem; font-weight: 600; }
.prose strong { font-weight: 600; color: var(--ink); }

.prose a {
  color: var(--orange-deep);
  text-decoration: none;
  background-image: linear-gradient(var(--orange), var(--orange));
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 100% 1.5px;
  transition: background-size 0.2s var(--ease);
}
.prose a:hover { background-size: 100% 100%; color: var(--navy); }

.prose ul, .prose ol { padding-left: 1.4rem; }
.prose li + li { margin-top: 0.5rem; }
.prose ul li::marker { color: var(--orange); }
.prose ol li::marker { color: var(--muted); font-family: var(--mono); font-size: 0.85em; }

.prose blockquote {
  border-left: 3px solid var(--orange);
  padding: 0.3rem 0 0.3rem 1.3rem;
  color: var(--muted);
  font-style: italic;
}

.prose code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--code-bg);
  padding: 0.15em 0.4em;
  border-radius: 4px;
}
.prose pre {
  font-family: var(--mono);
  background: var(--navy-deep);
  color: #e7edf3;
  font-size: 0.86rem;
  line-height: 1.6;
  padding: 1.25rem 1.4rem;
  border-radius: 10px;
  overflow-x: auto;
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow);
}
.prose pre code { background: none; padding: 0; font-size: inherit; color: inherit; }

.prose img { border-radius: 10px; border: 1px solid var(--line); }
.prose hr { border: none; border-top: 1px solid var(--line-strong); margin: 2.4rem 0; }

/* --- Brief footer ---------------------------------------------------------- */
.brief__foot {
  margin-top: clamp(2.5rem, 6vw, 3.5rem);
  padding-top: 1.5rem;
  border-top: 1px solid var(--line-strong);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 0.82rem;
}
.backlink, .brief__share {
  text-decoration: none;
  color: var(--muted);
  transition: color 0.18s var(--ease);
}
.backlink:hover, .brief__share:hover { color: var(--orange-deep); }

/* --- Site footer ----------------------------------------------------------- */
.site-foot {
  background: var(--navy);
  color: #b9c4ce;
  border-top: 3px solid var(--orange);
}
.site-foot__inner {
  max-width: var(--wide);
  margin-inline: auto;
  padding: clamp(2rem, 5vw, 3rem) var(--gutter);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.8rem 2rem;
}
.site-foot__brand {
  font-family: var(--sans);
  font-weight: 600;
  color: #fff;
  font-size: 1.05rem;
}
.site-foot__links {
  display: flex;
  gap: 1.4rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.site-foot__links a { color: #b9c4ce; text-decoration: none; transition: color 0.18s var(--ease); }
.site-foot__links a:hover { color: var(--orange); }
.site-foot__fine {
  flex-basis: 100%;
  margin-top: 0.6rem;
  padding-top: 1.1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-family: var(--mono);
  font-size: 0.72rem;
  line-height: 1.6;
  color: #8a97a2;
}

/* --- Load animation -------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  animation: reveal 0.6s var(--ease) forwards;
  animation-delay: calc(var(--i, 0) * 70ms + 80ms);
}
@keyframes reveal {
  to { opacity: 1; transform: none; }
}

/* --- Responsive ------------------------------------------------------------ */
@media (max-width: 34rem) {
  .masthead__inner { flex-direction: column; align-items: flex-start; gap: 1rem; }
  .brief-item__link {
    grid-template-columns: 1fr auto;
    gap: 0.35rem 1rem;
    padding-block: 1.25rem;
  }
  .brief-item__date { grid-column: 1 / -1; padding-top: 0; }
  .brief__foot { flex-direction: column; }
}

/* --- Reduced motion -------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-delay: 0ms !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}