/* davidrobinson.au — light executive theme */

:root {
  --ink: #14120f;
  --ink-soft: #4a453e;
  --ink-faint: #7d766c;
  --paper: #fbfaf7;
  --paper-alt: #f3f0ea;
  --rule: #e2ddd3;
  --accent: #1f4d5c;
  --accent-soft: #dceaee;
  --accent-warm: #9a5b28;

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

  --max: 1140px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --section-y: clamp(4rem, 9vw, 8rem);
}

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

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

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

h1,
h2,
h3,
h4 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 0 0 0.5em;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.6rem, 6vw, 4.5rem);
}

h2 {
  font-size: clamp(1.9rem, 3.6vw, 2.8rem);
}

h3 {
  font-size: clamp(1.15rem, 1.8vw, 1.4rem);
}

p {
  margin: 0 0 1.1em;
  color: var(--ink-soft);
  text-wrap: pretty;
}

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

a:hover {
  color: var(--accent-warm);
}

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

.wrap {
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: var(--section-y);
  border-top: 1px solid var(--rule);
}

.section--tint {
  background: var(--paper-alt);
}

.eyebrow {
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1rem;
}

.lede {
  font-size: clamp(1.1rem, 1.6vw, 1.3rem);
  color: var(--ink-soft);
  max-width: 62ch;
}

.section__head {
  max-width: 68ch;
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(251, 250, 247, 0.88);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--rule);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 68px;
}

.brand {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
}

.brand span {
  color: var(--ink-faint);
  font-family: var(--sans);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  display: block;
  margin-top: 2px;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.5vw, 2rem);
}

.nav a {
  font-size: 0.9rem;
  color: var(--ink-soft);
  text-decoration: none;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--ink);
  text-decoration: underline;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 0.45rem 0.7rem;
  font-size: 0.85rem;
  color: var(--ink);
  cursor: pointer;
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.5rem;
  border-radius: 2px;
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--accent);
  transition: background 0.18s ease, color 0.18s ease, transform 0.18s ease;
}

.btn--primary {
  background: var(--accent);
  color: #fff;
}

.btn--primary:hover {
  background: #163b47;
  color: #fff;
  transform: translateY(-1px);
}

.btn--ghost {
  background: transparent;
  color: var(--accent);
}

.btn--ghost:hover {
  background: var(--accent-soft);
  color: var(--accent);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}

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

.hero {
  padding-block: clamp(4rem, 10vw, 8.5rem) clamp(3rem, 7vw, 6rem);
}

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: start;
}

.hero h1 em {
  font-style: italic;
  color: var(--accent);
}

.hero__meta {
  border-left: 2px solid var(--accent);
  padding-left: 1.5rem;
  margin-top: 0.6rem;
}

.hero__meta dl {
  margin: 0;
  display: grid;
  gap: 1.1rem;
}

.hero__meta dt {
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-faint);
  font-weight: 700;
}

.hero__meta dd {
  margin: 0.2rem 0 0;
  font-family: var(--serif);
  font-size: 1.05rem;
  color: var(--ink);
}

/* ---------- metrics ---------- */

.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1px;
  background: var(--rule);
  border-block: 1px solid var(--rule);
}

.metric {
  background: var(--paper);
  padding: clamp(1.5rem, 3vw, 2.4rem) 1.25rem;
  text-align: center;
}

.metric__value {
  font-family: var(--serif);
  font-size: clamp(2.1rem, 4vw, 3rem);
  line-height: 1;
  color: var(--accent);
}

.metric__label {
  margin: 0.6rem 0 0;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

/* ---------- cards ---------- */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: clamp(1.25rem, 2.5vw, 2rem);
}

.card {
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: clamp(1.5rem, 2.5vw, 2.1rem);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.card__tag {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-warm);
  font-weight: 700;
}

.card p:last-child {
  margin-bottom: 0;
}

.card__result {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  font-family: var(--serif);
  font-size: 1rem;
  color: var(--ink);
}

/* ---------- capabilities ---------- */

.caps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: clamp(1.5rem, 3vw, 2.75rem);
}

.cap h3 {
  padding-bottom: 0.6rem;
  border-bottom: 2px solid var(--accent);
  margin-bottom: 1rem;
}

.cap ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.55rem;
}

.cap li {
  font-size: 0.94rem;
  color: var(--ink-soft);
  padding-left: 1.1rem;
  position: relative;
}

.cap li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 1px;
  background: var(--accent-warm);
}

/* ---------- patent ---------- */

.patent {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.patent__plate {
  border: 1px solid var(--accent);
  padding: clamp(1.75rem, 3vw, 2.5rem);
  background: var(--paper);
  text-align: center;
}

.patent__number {
  font-family: var(--mono);
  font-size: clamp(1.4rem, 3vw, 2rem);
  letter-spacing: 0.04em;
  color: var(--accent);
  display: block;
  margin-bottom: 0.5rem;
}

.patent__plate span.small {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

/* ---------- timeline ---------- */

.timeline {
  position: relative;
  margin-top: clamp(2rem, 4vw, 3rem);
  padding-left: clamp(1.5rem, 4vw, 3rem);
}

.timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--rule);
}

.timeline__progress {
  position: absolute;
  left: 6px;
  top: 8px;
  width: 1px;
  background: var(--accent);
  height: 0;
  transform-origin: top;
}

.era {
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.era__label {
  position: sticky;
  top: 78px;
  z-index: 5;
  display: inline-block;
  background: var(--paper);
  padding: 0.35rem 0.9rem 0.35rem 0;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-warm);
  margin-bottom: 1.5rem;
}

.entry {
  position: relative;
  padding: 0 0 2.25rem 0;
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.entry.is-visible {
  opacity: 1;
  transform: none;
}

.entry::before {
  content: "";
  position: absolute;
  left: calc(-1 * clamp(1.5rem, 4vw, 3rem) + 2px);
  top: 0.55rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--accent);
}

.entry--milestone::before {
  background: var(--accent-warm);
  border-color: var(--accent-warm);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.entry__year {
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
}

.entry__title {
  font-family: var(--serif);
  font-size: 1.3rem;
  margin: 0.15rem 0 0.1rem;
}

.entry__org {
  font-size: 0.9rem;
  color: var(--accent);
  margin-bottom: 0.7rem;
}

.entry ul {
  margin: 0.5rem 0 0;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.4rem;
}

.entry li {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.entry__badge {
  display: inline-block;
  margin-bottom: 0.4rem;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-warm);
  border: 1px solid var(--accent-warm);
  border-radius: 2px;
  padding: 0.15rem 0.5rem;
}

/* ---------- filters ---------- */

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.filters button {
  font: inherit;
  font-size: 0.85rem;
  padding: 0.45rem 1rem;
  border: 1px solid var(--rule);
  background: var(--paper);
  color: var(--ink-soft);
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.16s ease;
}

.filters button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.filters button[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.entry[hidden] {
  display: none;
}

/* ---------- writing ---------- */

.posts {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--rule);
}

.post {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: clamp(1rem, 3vw, 2.5rem);
  padding-block: 2rem;
  border-bottom: 1px solid var(--rule);
}

.post__date {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--ink-faint);
  padding-top: 0.35rem;
}

.post h3 {
  margin-bottom: 0.4rem;
}

.post p:last-child {
  margin-bottom: 0;
}

.badge-soon {
  display: inline-block;
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--ink-faint);
  border: 1px solid var(--rule);
  padding: 0.15rem 0.5rem;
  margin-left: 0.5rem;
  vertical-align: middle;
}

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

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4.5rem);
}

.contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.5rem;
}

.contact-list dt,
.contact-list .label {
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-faint);
  font-weight: 700;
}

.contact-list .value {
  font-family: var(--serif);
  font-size: 1.15rem;
  margin-top: 0.2rem;
}

.callout {
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
  background: var(--paper);
  padding: clamp(1.5rem, 3vw, 2.25rem);
}

.callout ul {
  margin: 0.75rem 0 0;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.5rem;
  color: var(--ink-soft);
}

/* ---------- cta ---------- */

.cta {
  background: var(--accent);
  color: #fff;
  padding-block: clamp(3.5rem, 7vw, 6rem);
}

.cta h2,
.cta p {
  color: #fff;
}

.cta p {
  opacity: 0.86;
  max-width: 56ch;
}

.cta .btn--primary {
  background: #fff;
  color: var(--accent);
  border-color: #fff;
}

.cta .btn--primary:hover {
  background: var(--accent-soft);
  color: var(--accent);
}

.cta .btn--ghost {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.55);
}

.cta .btn--ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

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

.site-footer {
  border-top: 1px solid var(--rule);
  padding-block: 2.5rem;
  font-size: 0.85rem;
  color: var(--ink-faint);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: space-between;
  align-items: center;
}

.site-footer a {
  color: var(--ink-soft);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--accent);
}

.skip-link {
  position: absolute;
  left: -9999px;
}

.skip-link:focus {
  left: var(--gutter);
  top: 0.5rem;
  z-index: 100;
  background: var(--accent);
  color: #fff;
  padding: 0.6rem 1rem;
}

/* ---------- responsive ---------- */

@media (max-width: 860px) {
  .hero__grid,
  .patent,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .post {
    grid-template-columns: 1fr;
    gap: 0.4rem;
  }

  .nav-toggle {
    display: block;
  }

  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--rule);
    padding: 0.5rem var(--gutter) 1rem;
  }

  .nav.is-open {
    display: flex;
  }

  .nav a {
    padding: 0.65rem 0;
    width: 100%;
    border-bottom: 1px solid var(--rule);
  }

  .era__label {
    top: 70px;
  }
}

@media print {
  .site-header,
  .site-footer,
  .filters,
  .cta {
    display: none;
  }

  body {
    background: #fff;
  }

  .entry {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .entry {
    opacity: 1;
    transform: none;
    transition: none;
  }
}