:root {
  --ink: #102317;
  --forest: #173b25;
  --deep: #07160f;
  --moss: #426b3f;
  --field: #d9c56e;
  --wheat: #f1e7c7;
  --paper: #f5f1e4;
  --white: #fffdf6;
  --rust: #b34c2c;
  --muted: #697567;
  --line: rgba(16, 35, 23, 0.18);
  --content: 1180px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Segoe UI", Arial, sans-serif;
  line-height: 1.55;
}

img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3, p { overflow-wrap: anywhere; }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 28px;
  min-height: 72px;
  padding: 12px max(22px, calc((100vw - var(--content)) / 2));
  color: var(--white);
  background: rgba(7, 22, 15, 0.9);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  width: fit-content;
  text-decoration: none;
}

.brand img {
  width: 32px;
  height: 32px;
  border-radius: 7px;
}

.brand span { display: grid; gap: 2px; }
.brand strong { font-family: Georgia, serif; font-size: 18px; line-height: 1.05; }
.brand small { color: var(--field); font-size: 10px; font-weight: 800; letter-spacing: 0.12em; text-transform: uppercase; }

nav { display: flex; align-items: center; gap: 25px; }
nav a, .header-action { font-size: 13px; font-weight: 750; text-decoration: none; }
nav a:hover { color: var(--field); }

.header-action {
  padding: 10px 14px;
  border: 1px solid rgba(255,255,255,0.42);
  border-radius: 4px;
}

.hero {
  position: relative;
  min-height: 100svh;
  color: var(--white);
  overflow: hidden;
}

.hero-media {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(7, 22, 15, 0.97) 0%, rgba(7, 22, 15, 0.86) 43%, rgba(7, 22, 15, 0.34) 72%, rgba(7, 22, 15, 0.12) 100%),
    linear-gradient(0deg, rgba(7, 22, 15, 0.86) 0%, rgba(7, 22, 15, 0.12) 43%),
    url("assets/field-drone-cover-art.png") center / cover;
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(270px, 0.72fr);
  align-items: center;
  gap: clamp(36px, 7vw, 92px);
  width: min(var(--content), calc(100% - 48px));
  min-height: calc(100svh - 72px);
  margin: 0 auto;
  padding: 128px 0 88px;
}

h1 {
  max-width: 760px;
  margin: 0;
  font-family: Georgia, serif;
  font-size: clamp(54px, 8vw, 108px);
  line-height: 0.9;
  letter-spacing: 0;
}

.subtitle {
  max-width: 650px;
  margin: 25px 0 0;
  color: var(--field);
  font-family: Georgia, serif;
  font-size: clamp(22px, 2.45vw, 33px);
  line-height: 1.18;
}

.lede {
  max-width: 650px;
  margin: 25px 0 0;
  color: rgba(255,255,255,0.84);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 19px;
  border: 1px solid transparent;
  border-radius: 4px;
  font-weight: 800;
  text-decoration: none;
  transition: transform 0.18s ease, background 0.18s ease, color 0.18s ease;
}

.button:hover { transform: translateY(-2px); }
.button.primary { background: var(--rust); color: var(--white); }
.button.primary:hover { background: #c75a37; }
.button.secondary { border-color: rgba(255,255,255,0.45); color: var(--white); }
.button.secondary:hover { background: var(--white); color: var(--ink); }
.button.light { background: var(--white); color: var(--forest); }

.proof-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin: 34px 0 0;
}

.proof-row div {
  min-width: 112px;
  padding: 0 22px 0 0;
  margin-right: 22px;
  border-right: 1px solid rgba(255,255,255,0.2);
}

.proof-row div:last-child { border-right: 0; }
.proof-row dt { color: var(--field); font-family: Georgia, serif; font-size: 29px; font-weight: 800; line-height: 1; }
.proof-row dd { margin: 5px 0 0; color: rgba(255,255,255,0.7); font-size: 12px; font-weight: 800; letter-spacing: 0.1em; text-transform: uppercase; }

.cover-card {
  margin: 0;
  justify-self: center;
  width: min(350px, 78vw);
  transform: rotateY(-8deg) rotateX(1.5deg);
  transform-origin: center;
  filter: drop-shadow(28px 34px 44px rgba(0,0,0,0.46));
}

.cover-card img {
  border: 1px solid rgba(255,255,255,0.38);
  border-radius: 2px;
}

.cover-card figcaption {
  margin-top: 13px;
  color: rgba(255,255,255,0.66);
  font-size: 13px;
  text-align: center;
}

.scroll-cue {
  position: absolute;
  z-index: 3;
  left: 50%;
  bottom: 24px;
  color: rgba(255,255,255,0.72);
  font-size: 13px;
  text-decoration: none;
  transform: translateX(-50%);
}

.promise, .inside, .resources, .author {
  width: min(var(--content), calc(100% - 48px));
  margin: 0 auto;
  padding: 104px 0;
}

.section-lede, .inside-copy {
  max-width: 780px;
}

h2 {
  margin: 0;
  font-family: Georgia, serif;
  font-size: clamp(38px, 5.2vw, 68px);
  line-height: 1.03;
  letter-spacing: 0;
}

.section-lede p, .inside-copy p, .resources p, .author-copy p {
  color: #465242;
  font-size: 18px;
}

.decision-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 62px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.decision-grid article {
  min-height: 255px;
  padding: 29px 24px 32px;
  border-right: 1px solid var(--line);
}

.decision-grid article:first-child { padding-left: 0; }
.decision-grid article:last-child { border-right: 0; }
.decision-grid span { color: var(--rust); font-family: Georgia, serif; font-size: 21px; font-weight: 800; }
.decision-grid h3 { margin: 45px 0 14px; font-family: Georgia, serif; font-size: 23px; line-height: 1.18; }
.decision-grid p { margin: 0; color: #52614d; }

.inside {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(340px, 1.1fr);
  gap: 58px;
  align-items: start;
  border-top: 1px solid var(--line);
}

.part-list {
  display: grid;
  gap: 0;
  margin: 40px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.part-list li {
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.part-list strong { color: var(--rust); font-size: 13px; letter-spacing: 0.1em; text-transform: uppercase; }
.part-list span { font-family: Georgia, serif; font-size: 22px; font-weight: 700; }

.wrap-preview {
  margin: 0;
  padding: 13px;
  background: #0e2518;
  border: 1px solid rgba(16,35,23,0.2);
  box-shadow: 0 26px 70px rgba(16, 35, 23, 0.22);
}

.resources {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 54px;
  align-items: center;
  background:
    linear-gradient(135deg, rgba(23,59,37,0.98), rgba(8,31,19,0.98)),
    url("assets/field-drone-cover-art.png") center / cover;
  color: var(--white);
  width: 100%;
  padding: 92px max(24px, calc((100vw - var(--content)) / 2));
}

.resources p {
  max-width: 680px;
  color: rgba(255,255,255,0.78);
}

.qr-panel {
  margin: 0;
  padding: 20px;
  background: var(--white);
  color: var(--ink);
  border-radius: 5px;
  text-align: center;
}

.qr-panel img { width: 100%; }
.qr-panel p { margin: 12px 0 0; color: var(--ink); font-size: 13px; font-weight: 800; }

.author {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 56px;
  align-items: center;
}

.author-photo img {
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 6px;
  box-shadow: 0 22px 55px rgba(16,35,23,0.18);
}

.author-lede {
  color: var(--forest) !important;
  font-family: Georgia, serif;
  font-size: 24px !important;
  line-height: 1.28;
}

.final-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 72px max(24px, calc((100vw - var(--content)) / 2));
  color: var(--white);
  background: var(--deep);
}

.final-cta h2 {
  max-width: 780px;
  font-size: clamp(34px, 4.4vw, 58px);
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 34px max(24px, calc((100vw - var(--content)) / 2));
  background: #06110c;
  color: rgba(255,255,255,0.76);
  font-size: 14px;
}

footer p { margin: 0; }
footer a { color: var(--field); text-decoration: none; }

@media (max-width: 940px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  nav { display: none; }

  .hero-inner, .inside, .resources, .author {
    grid-template-columns: 1fr;
  }

  .cover-card {
    width: min(310px, 74vw);
    transform: none;
  }

  .decision-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .decision-grid article:nth-child(2) { border-right: 0; }
  .decision-grid article:nth-child(n + 3) { border-top: 1px solid var(--line); }

  .qr-panel {
    width: min(260px, 100%);
  }

  .final-cta {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 620px) {
  .site-header {
    min-height: 68px;
    padding: 10px 16px;
  }

  .brand strong { font-size: 15px; }
  .brand small { font-size: 9px; }
  .brand img { width: 28px; height: 28px; }
  .header-action { display: none; }

  .hero-inner {
    width: min(100% - 32px, var(--content));
    padding: 100px 0 76px;
  }

  h1 { font-size: clamp(46px, 15vw, 70px); }
  .subtitle { font-size: 22px; }
  .lede { font-size: 16px; }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .button { width: 100%; }
  .proof-row div { min-width: 95px; margin-right: 14px; padding-right: 14px; }

  .promise, .inside, .author {
    width: min(100% - 32px, var(--content));
    padding: 72px 0;
  }

  .decision-grid {
    grid-template-columns: 1fr;
  }

  .decision-grid article,
  .decision-grid article:first-child {
    min-height: auto;
    padding: 25px 0;
    border-right: 0;
    border-top: 1px solid var(--line);
  }

  .decision-grid article:first-child { border-top: 0; }
  .decision-grid h3 { margin-top: 18px; }
  .part-list li { grid-template-columns: 1fr; gap: 5px; }
  .resources { padding: 72px 16px; }
  .author { gap: 28px; }
  footer { flex-direction: column; }
}