/* =================================================================
   Project Mow — Rogue Tensor 72" (RT-72) autonomous mower project page
   Single stylesheet, no preprocessor, no framework.
   ================================================================= */

:root {
  --bg:           #0b0f0c;
  --bg-alt:       #11171312;
  --bg-card:      #131a16;
  --bg-elev:      #182019;
  --line:         #233127;
  --line-soft:    #1b251f;
  --ink:          #e8efe9;
  --ink-dim:      #9fb1a3;
  --ink-mute:     #6b7d70;
  --accent:       #9cf26b;     /* fresh-cut green */
  --accent-deep:  #5fb83a;
  --accent-soft:  #9cf26b22;
  --warn:         #f2c35d;
  --bad:          #f27a6b;
  --good:         #9cf26b;
  --radius:       14px;
  --radius-sm:    8px;
  --maxw:         1180px;
  --shadow:       0 6px 24px -8px rgba(0,0,0,.45);
  --mono:         "JetBrains Mono", ui-monospace, SFMono-Regular, monospace;
  --sans:         "Space Grotesk", system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: var(--mono); font-size: .92em; background: var(--bg-elev); padding: 1px 6px; border-radius: 4px; }
em { font-style: italic; color: var(--ink); }
strong { color: var(--ink); }

/* ------------- NAV ------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11,15,12,.82);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--line-soft);
}
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 700;
  letter-spacing: -.01em;
}
.brand:hover { text-decoration: none; }
.brand-mark {
  display: inline-block;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .04em;
  padding: 3px 7px;
  border: 1px solid var(--accent-deep);
  border-radius: 4px;
  background: var(--accent-soft);
  line-height: 1;
}
.brand-name { font-size: 16px; }
.nav-links {
  display: flex;
  gap: 22px;
  font-size: 14px;
}
.nav-links a {
  color: var(--ink-dim);
  font-weight: 500;
}
.nav-links a:hover {
  color: var(--ink);
  text-decoration: none;
}
@media (max-width: 720px) {
  .nav-links { display: none; }
}

/* ------------- HERO ------------- */
.hero {
  position: relative;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 80px 22px 60px;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 56px;
  align-items: center;
  overflow: hidden;
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-soft) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 70% 60% at 30% 50%, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 30% 50%, black 30%, transparent 75%);
  pointer-events: none;
  opacity: .6;
}
.hero-content { position: relative; z-index: 1; }
.eyebrow {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--accent-deep);
}
.hero h1 {
  font-size: clamp(36px, 5vw, 60px);
  line-height: 1.05;
  letter-spacing: -.025em;
  margin: 22px 0 18px;
  font-weight: 700;
}
.hero h1 .accent { color: var(--accent); }
.lede {
  font-size: 19px;
  color: var(--ink-dim);
  max-width: 56ch;
  margin: 0 0 32px;
}
.hero-cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.btn-primary, .btn-ghost {
  display: inline-flex;
  align-items: center;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 15px;
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
}
.btn-primary {
  background: var(--accent);
  color: #0b1308;
  border: 1px solid var(--accent);
}
.btn-primary:hover { transform: translateY(-1px); text-decoration: none; background: #b6f883; }
.btn-ghost {
  border: 1px solid var(--line);
  color: var(--ink);
  background: transparent;
}
.btn-ghost:hover { border-color: var(--accent); text-decoration: none; }

.hero-image {
  position: relative;
  z-index: 1;
  aspect-ratio: 4 / 3;
}

@media (max-width: 920px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 56px 22px 32px;
    gap: 32px;
  }
}

/* ------------- IMAGE PLACEHOLDERS ------------- */
.image-placeholder {
  position: relative;
  background: var(--bg-card);
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  display: grid;
  place-items: center;
  text-align: center;
  padding: 28px;
  min-height: 220px;
  overflow: hidden;
}
.image-placeholder::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      135deg,
      transparent 0 18px,
      rgba(156, 242, 107, .04) 18px 19px
    );
  pointer-events: none;
}
.placeholder-inner {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: center;
}
.placeholder-icon {
  font-size: 28px;
  color: var(--accent);
  opacity: .55;
  margin-bottom: 4px;
}
.placeholder-label {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink);
  background: var(--bg-elev);
  padding: 4px 10px;
  border-radius: 4px;
  border: 1px solid var(--line-soft);
}
.placeholder-hint {
  font-size: 13px;
  color: var(--ink-mute);
  max-width: 32ch;
  line-height: 1.45;
}
.placeholder-hero { min-height: 320px; aspect-ratio: 4/3; }
.placeholder-wide { width: 100%; min-height: 320px; margin-top: 36px; aspect-ratio: 16/7; }

/* Real photos (replace placeholders once images are dropped in). */
.photo {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--line-soft);
  object-fit: cover;
}
.photo-hero { aspect-ratio: 4 / 3; }
.photo-callout { aspect-ratio: 4 / 3; height: auto; }
.photo-wide {
  aspect-ratio: 16 / 7;
  height: auto;
  margin-top: 36px;
}

/* ------------- AT-A-GLANCE STRIP ------------- */
.strip {
  background: var(--bg-card);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  margin: 24px 0 0;
}
.strip-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 28px 22px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
  text-align: center;
}
.strip-num {
  font-family: var(--mono);
  font-size: 28px;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: -.02em;
}
.strip-lbl {
  font-size: 13px;
  color: var(--ink-mute);
  letter-spacing: .04em;
  text-transform: uppercase;
  margin-top: 4px;
}
@media (max-width: 720px) {
  .strip-inner { grid-template-columns: repeat(2, 1fr); }
}

/* ------------- SECTIONS ------------- */
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 96px 22px;
  scroll-margin-top: 70px;
}
.section-alt {
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(156,242,107,.04), transparent 60%),
    var(--bg-alt);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  max-width: none;
  padding-left: 0;
  padding-right: 0;
}
.section-alt > * {
  max-width: var(--maxw);
  margin-left: auto;
  margin-right: auto;
  padding-left: 22px;
  padding-right: 22px;
}

.section-head { margin-bottom: 56px; max-width: 720px; }
.section-num {
  display: inline-block;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  letter-spacing: .15em;
  margin-bottom: 12px;
}
.section h2 {
  font-size: clamp(28px, 3.6vw, 42px);
  letter-spacing: -.02em;
  line-height: 1.1;
  margin: 0 0 16px;
  font-weight: 700;
}
.section-lede {
  font-size: 18px;
  color: var(--ink-dim);
  margin: 0;
}

/* ------------- TWO-COLUMN ------------- */
.content-2col {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  align-items: start;
}
.content-2col.reverse { grid-template-columns: 1fr 1.4fr; }
.content-2col.reverse .prose { order: 2; }
.content-2col.reverse aside { order: 1; }
@media (max-width: 920px) {
  .content-2col,
  .content-2col.reverse { grid-template-columns: 1fr; gap: 32px; }
  .content-2col.reverse .prose,
  .content-2col.reverse aside { order: initial; }
}

/* ------------- PROSE ------------- */
.prose h3 {
  font-size: 22px;
  margin: 32px 0 10px;
  letter-spacing: -.01em;
}
.prose h3:first-child { margin-top: 0; }
.prose p { color: var(--ink-dim); margin: 0 0 14px; }
.prose.center { max-width: 820px; margin: 56px auto 0; text-align: left; }

.check-list {
  list-style: none;
  padding: 0;
  margin: 0 0 18px;
}
.check-list li {
  position: relative;
  padding: 12px 0 12px 26px;
  border-top: 1px solid var(--line-soft);
  color: var(--ink-dim);
}
.check-list li:last-child { border-bottom: 1px solid var(--line-soft); }
.check-list li::before {
  content: "›";
  position: absolute;
  left: 4px;
  top: 12px;
  color: var(--accent);
  font-family: var(--mono);
  font-weight: 700;
}

/* ------------- CALLOUT ------------- */
.callout {
  position: sticky;
  top: 90px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.callout .image-placeholder { min-height: 200px; }
.callout-stats {
  background: var(--bg-card);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 18px 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 20px;
}
.stat-k {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-mute);
  letter-spacing: .12em;
  text-transform: uppercase;
}
.stat-v {
  font-size: 16px;
  color: var(--ink);
  font-weight: 600;
  margin-top: 2px;
}
@media (max-width: 920px) {
  .callout { position: static; }
}

/* ------------- DUTY-CYCLE TABLE ------------- */
.duty-card {
  margin: 24px 0;
  background: var(--bg-card);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 14px;
}
.duty-row {
  display: grid;
  grid-template-columns: 1.1fr 1fr 1.6fr;
  gap: 12px;
  padding: 12px 16px;
  border-top: 1px solid var(--line-soft);
}
.duty-row:first-child { border-top: 0; }
.duty-row.duty-head {
  background: var(--bg-elev);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ink-mute);
  text-transform: uppercase;
}
.duty-row.highlight { background: rgba(156,242,107,.05); }
.duty-row .good { color: var(--good); }
.duty-row .bad  { color: var(--bad); }
.duty-row .ok   { color: var(--warn); }
@media (max-width: 720px) {
  .duty-row { grid-template-columns: 1fr 1fr; font-size: 13px; }
  .duty-row.duty-head { display: none; }
}

/* ------------- RTK COMPARISON ------------- */
.rtk-card {
  background: var(--bg-card);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 14px;
}
.rtk-row {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 12px;
  padding: 12px 16px;
  border-top: 1px solid var(--line-soft);
}
.rtk-row:first-child { border-top: 0; }
.rtk-row.rtk-head {
  background: var(--bg-elev);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ink-mute);
  text-transform: uppercase;
}
.rtk-row.highlight {
  background: rgba(156,242,107,.06);
  font-weight: 600;
  color: var(--ink);
}
.rtk-row .good { color: var(--good); }
.rtk-row .bad  { color: var(--bad); }
.rtk-row .ok   { color: var(--warn); }

/* ------------- CARDS ------------- */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color .2s ease, transform .2s ease;
}
.card:hover {
  border-color: var(--accent-deep);
  transform: translateY(-2px);
}
.card-icon {
  font-size: 22px;
  color: var(--accent);
  margin-bottom: 8px;
}
.card h3 {
  font-size: 17px;
  margin: 4px 0 10px;
  letter-spacing: -.005em;
}
.card p {
  font-size: 14.5px;
  color: var(--ink-dim);
  margin: 0;
  line-height: 1.55;
}
@media (max-width: 920px) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .cards { grid-template-columns: 1fr; } }

/* ------------- VS ------------- */
.vs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 48px;
}
.vs-card {
  background: var(--bg-card);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 26px;
  position: relative;
}
.vs-winner {
  border-color: var(--accent-deep);
  box-shadow: 0 0 0 1px var(--accent-deep), 0 12px 36px -12px rgba(156,242,107,.18);
}
.vs-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.vs-head h3 {
  margin: 0;
  font-size: 22px;
  letter-spacing: -.01em;
}
.vs-tag {
  font-family: var(--mono);
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--bg-elev);
  color: var(--ink-dim);
  border: 1px solid var(--line-soft);
}
.vs-tag.tag-win {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: var(--accent-deep);
}
.vs-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.vs-list li {
  position: relative;
  padding: 10px 0 10px 26px;
  font-size: 14.5px;
  color: var(--ink-dim);
  border-top: 1px solid var(--line-soft);
}
.vs-list li:first-child { border-top: 0; }
.vs-list li::before {
  position: absolute;
  left: 0;
  top: 10px;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 14px;
}
.vs-list li.pro::before { content: "+"; color: var(--good); }
.vs-list li.con::before { content: "−"; color: var(--bad); }
@media (max-width: 720px) { .vs-grid { grid-template-columns: 1fr; } }

/* ------------- STACK ------------- */
.stack {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 56px;
}
.stack-layer {
  display: grid;
  grid-template-columns: 140px 1fr;
  background: var(--bg-card);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
}
.layer-tag {
  background: var(--bg-elev);
  border-right: 1px solid var(--line-soft);
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
}
.layer-body { padding: 22px 26px; }
.layer-body h3 {
  margin: 0 0 8px;
  font-size: 19px;
  letter-spacing: -.01em;
}
.layer-body p {
  margin: 0;
  color: var(--ink-dim);
  font-size: 15px;
}
.layer-ui    .layer-tag { background: rgba(156,242,107,.08); }
.layer-mid   .layer-tag { background: rgba(156,242,107,.05); }
.layer-mcu   .layer-tag { background: rgba(156,242,107,.03); }
@media (max-width: 620px) {
  .stack-layer { grid-template-columns: 1fr; }
  .layer-tag {
    border-right: 0;
    border-bottom: 1px solid var(--line-soft);
    padding: 8px 0;
  }
}

/* ------------- FEATURES GRID ------------- */
.features-head {
  font-size: 22px;
  margin: 16px 0 22px;
  letter-spacing: -.01em;
}
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.feature {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 22px;
  background: var(--bg-card);
}
.feature-num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: .15em;
  margin-bottom: 8px;
}
.feature h4 {
  margin: 0 0 8px;
  font-size: 17px;
}
.feature p {
  margin: 0;
  color: var(--ink-dim);
  font-size: 14.5px;
  line-height: 1.55;
}
@media (max-width: 920px) { .features { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .features { grid-template-columns: 1fr; } }

/* ------------- ROADMAP ------------- */
.roadmap {
  list-style: none;
  padding: 0;
  margin: 0;
  max-width: 820px;
  position: relative;
}
.roadmap::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: var(--line);
}
.roadmap li {
  position: relative;
  padding: 14px 0 14px 36px;
  color: var(--ink-dim);
}
.roadmap .dot {
  position: absolute;
  left: 0;
  top: 22px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
  box-shadow: 0 0 0 4px var(--bg);
}
.roadmap strong { color: var(--ink); }

/* ------------- CENTERED SECTION VARIANT ------------- */
/* Used for "What's next" — center the header and the roadmap items. */
.section-centered .section-head {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}
.section-centered .roadmap {
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}
.section-centered .roadmap::before { display: none; }
.section-centered .roadmap li {
  padding: 0;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.section-centered .roadmap .dot {
  position: static;
  display: block;
}
.section-centered .roadmap li > div {
  max-width: 56ch;
}

/* ------------- LOGO STRIP ------------- */
.logos {
  border-top: 1px solid var(--line-soft);
  background:
    radial-gradient(ellipse 60% 80% at 50% 0%, rgba(156,242,107,.04), transparent 65%),
    var(--bg-alt);
}
.logos-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 56px 22px;
  text-align: center;
}
.logos-heading {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin: 0 0 28px;
}
.logos-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  align-items: stretch;
}
.logo-slot {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 96px;
  padding: 18px 22px;
  background: var(--bg-card);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--ink-dim);
  opacity: .85;
  transition: opacity .15s ease, border-color .15s ease, transform .15s ease;
}
.logo-slot:hover {
  opacity: 1;
  border-color: var(--accent-deep);
  transform: translateY(-1px);
  text-decoration: none;
}
.logo-slot img {
  max-height: 36px;
  max-width: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
}
/* Springfield Mow's logo (character + wordmark) needs more headroom than the
   single-line wordmarks. The PNG has been recolored: white plate -> transparent,
   black text -> white. The green border, green 'MOW', and character art all
   stay as designed. */
.logo-tall {
  padding: 10px 14px;
}
.logo-tall img {
  max-height: 72px;
}
.logos-disclaimer {
  margin: 24px 0 0;
  font-size: 13px;
  color: var(--ink-mute);
  font-style: italic;
}
@media (max-width: 720px) {
  .logos-row { grid-template-columns: repeat(2, 1fr); }
}

/* ------------- FOOTER ------------- */
.footer {
  border-top: 1px solid var(--line-soft);
  background: var(--bg-card);
}
.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 36px 22px 48px;
  text-align: center;
}
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  color: var(--ink);
  font-weight: 700;
}
.footer-note {
  color: var(--ink-dim);
  margin: 0 0 6px;
  font-size: 14.5px;
}
.footer-meta {
  color: var(--ink-mute);
  margin: 0;
  font-size: 13px;
  font-family: var(--mono);
}

/* ------------- REVEAL (set by JS) ------------- */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}