/* ==========================================================
   Sylvora Sensors Inc. — site styles
   Palette taken from the logo: forest night, leaf, moss, ember
   ========================================================== */
:root {
  --night: #0a231d;      /* deep forest floor */
  --canopy: #0f2e26;     /* canopy green */
  --canopy-2: #164035;   /* raised surfaces */
  --leaf: #8cc63f;       /* bright leaf green */
  --moss: #3f8a3a;       /* deep S-ribbon green */
  --ember: #f26a1b;      /* flame orange */
  --flare: #c8341a;      /* inner flame red */
  --mist: #e9f0ea;       /* primary text */
  --fog: #a9bab0;        /* secondary text */
  --line: rgba(140, 198, 63, 0.22);

  --display: "Josefin Sans", "Futura", "Century Gothic", system-ui, sans-serif;
  --body: "Source Sans 3", "Segoe UI", system-ui, -apple-system, sans-serif;

  --wrap: 1180px;
  --radius: 14px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  background: var(--night);
  color: var(--mist);
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--leaf); }
a:focus-visible, button:focus-visible, input:focus-visible,
select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--ember);
  outline-offset: 3px;
}

h1, h2, h3 { font-family: var(--display); font-weight: 400; line-height: 1.15; margin: 0; }
h1 { font-size: clamp(2.4rem, 5.6vw, 4.6rem); font-weight: 300; letter-spacing: -0.01em; }
h2 { font-size: clamp(1.9rem, 3.6vw, 2.9rem); font-weight: 300; }
h3 { font-size: 1.25rem; font-weight: 600; letter-spacing: 0.01em; }
p { margin: 0 0 1em; }

.wrap { width: min(var(--wrap), 100% - 2.5rem); margin-inline: auto; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.skip { position: absolute; left: -999px; top: 0; background: var(--leaf); color: var(--night); padding: .6rem 1rem; z-index: 100; }
.skip:focus { left: 1rem; top: 1rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  font-family: var(--display);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: .04em;
  text-decoration: none;
  color: #1b0a02;
  background: linear-gradient(135deg, var(--ember), #ff8d3a);
  border: 0;
  border-radius: 999px;
  padding: .95rem 1.6rem .85rem;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease;
  box-shadow: 0 8px 28px -10px rgba(242, 106, 27, .7);
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 12px 32px -10px rgba(242, 106, 27, .9); }
.btn--ghost { background: transparent; color: var(--mist); box-shadow: inset 0 0 0 1px rgba(233,240,234,.35); }
.btn--ghost:hover { box-shadow: inset 0 0 0 1px var(--leaf); }
.btn--small { padding: .6rem 1.1rem .5rem; font-size: .92rem; }

/* ---------- Navigation ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  background: rgba(10, 38, 31, .72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav__inner { width: min(var(--wrap), 100% - 2.5rem); margin-inline: auto; display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: .7rem; text-decoration: none; color: var(--mist); }
.brand__word { font-family: var(--display); font-size: 1.2rem; letter-spacing: .38em; padding-top: 4px; }
.nav__links { display: flex; align-items: center; gap: 1.8rem; }
.nav__links a:not(.btn) { color: var(--fog); text-decoration: none; font-size: .98rem; }
.nav__links a:not(.btn):hover { color: var(--mist); }
.nav__toggle { display: none; background: none; border: 0; padding: .5rem; cursor: pointer; }
.nav__toggle .bar { display: block; width: 24px; height: 2px; background: var(--mist); margin: 5px 0; transition: transform .2s; }
.nav__toggle[aria-expanded="true"] .bar:first-of-type { transform: translateY(3.5px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] .bar:last-of-type { transform: translateY(-3.5px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex; align-items: center;
  padding: 120px 0 170px;
  overflow: hidden;
  /* dusk sky over the forest, warming toward a wildfire horizon */
  background:
    radial-gradient(900px 420px at 82% 88%, rgba(242,106,27,.42), transparent 65%),
    radial-gradient(600px 300px at 95% 75%, rgba(200,52,26,.30), transparent 70%),
    linear-gradient(180deg, #0b2a26 0%, #13392f 38%, #1f4a38 62%, #4a3a22 86%, #6a3a1a 100%);
}
.scene, .scene__near { position: absolute; inset: 0; pointer-events: none; }
.scene__glow {
  position: absolute; right: -10%; bottom: 8%; width: 60%; height: 55%;
  background: radial-gradient(closest-side, rgba(255,140,60,.35), rgba(242,106,27,.12) 55%, transparent);
  filter: blur(20px);
  animation: flicker 5s ease-in-out infinite alternate;
}
@keyframes flicker { from { opacity: .75; transform: scale(1); } to { opacity: 1; transform: scale(1.05); } }
.scene__mountains, .scene__far, .scene__near::after, .footer__trees {
  position: absolute; left: 0; right: 0; bottom: 0;
  background-repeat: no-repeat; background-size: 100% 100%;
}
.scene__mountains { height: 34%; bottom: 14%; background-image: url("assets/mountains.svg"); opacity: .9; }
.scene__far { height: 30%; bottom: 6%; background-image: url("assets/treeline-far.svg"); }
.scene__near::after { content: ""; height: 24%; background-image: url("assets/treeline-near.svg"); }
#network { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero__shade {
  position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(90deg, rgba(8,30,25,.78) 0%, rgba(8,30,25,.35) 42%, rgba(8,30,25,0) 70%);
}
.hero__grid { position: relative; display: grid; grid-template-columns: 1.25fr .85fr; gap: 3rem; align-items: end; }
.hero__mark { width: 72px; margin-bottom: 1.8rem; filter: drop-shadow(0 10px 30px rgba(242,106,27,.25)); }
.hero h1 {
  background: linear-gradient(180deg, #ffffff 30%, #cfe3c2 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lede { font-size: 1.22rem; color: var(--fog); max-width: 34em; margin-top: 1.6rem; }
.lede--small { font-size: 1.1rem; }
.hero__actions { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 2.2rem; }

.readout {
  background: rgba(10, 38, 31, .7);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.4rem 1.5rem 1.1rem;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  max-width: 400px; justify-self: end; width: 100%; margin-bottom: 1rem;
}
.readout__title { display: flex; align-items: center; gap: .6rem; font-family: var(--display); font-weight: 600; margin-bottom: 1rem; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--leaf); box-shadow: 0 0 0 4px rgba(140,198,63,.18); transition: background .3s, box-shadow .3s; flex: none; }
.dot.is-alert { background: var(--ember); box-shadow: 0 0 0 5px rgba(242,106,27,.25); }
.readout dl { margin: 0; }
.readout dl div { display: flex; justify-content: space-between; gap: 1rem; padding: .55rem 0; border-top: 1px solid rgba(233,240,234,.08); }
.readout dt { color: var(--fog); font-size: .92rem; white-space: nowrap; }
.readout dd { margin: 0; text-align: right; font-weight: 600; font-size: .95rem; transition: color .3s; }
.readout dd.is-hot { color: var(--ember); }
.readout__note { color: #6f8579; font-size: .8rem; margin: .8rem 0 0; }

/* ---------- Sections ---------- */
.section {
  padding: clamp(4.5rem, 9vw, 7.5rem) 0;
  background:
    url("assets/topo.svg") center / 600px 560px repeat,
    radial-gradient(900px 500px at 100% 0%, rgba(63,138,58,.16), transparent 70%),
    var(--night);
}
.section--canopy {
  background:
    url("assets/topo.svg") center / 600px 560px repeat,
    radial-gradient(800px 420px at 0% 100%, rgba(242,106,27,.10), transparent 70%),
    radial-gradient(1000px 600px at 90% 10%, rgba(140,198,63,.12), transparent 70%),
    linear-gradient(180deg, var(--canopy), #0b261f);
}
.head { max-width: 640px; margin-bottom: 3rem; }
.head p { color: var(--fog); margin-top: 1rem; font-size: 1.1rem; }
.split { display: grid; grid-template-columns: 1fr 1.2fr; gap: clamp(2rem, 6vw, 6rem); align-items: start; }
.prose { max-width: 38em; }
.prose p { color: var(--fog); }
.prose h3 { margin: 2rem 0 .6rem; color: var(--leaf); }
.prose h3:first-child { margin-top: 0; }

/* How it works — a real sequence, so numbered */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(6, 1fr); gap: 1.25rem; position: relative; }
.steps::before {
  content: ""; position: absolute; top: 22px; left: 22px; right: 22px; height: 2px;
  background: linear-gradient(90deg, var(--moss), var(--leaf) 55%, var(--ember));
  opacity: .6;
}
.steps li { position: relative; }
.steps__n {
  display: grid; place-items: center; width: 44px; height: 44px; border-radius: 50%;
  background: var(--night); border: 2px solid var(--leaf);
  font-family: var(--display); font-weight: 600; padding-top: 3px; margin-bottom: 1.2rem;
  position: relative;
}
.steps li:last-child .steps__n { border-color: var(--ember); color: var(--ember); }
.steps h3 { margin-bottom: .5rem; }
.steps p { color: var(--fog); font-size: .97rem; }

/* Adaptive states */
.states { list-style: none; padding: 0; margin: 2rem 0 0; }
.states li { display: flex; align-items: baseline; gap: .8rem; padding: .8rem 0; border-top: 1px solid var(--line); color: var(--fog); }
.states strong { color: var(--mist); font-weight: 600; }
.state { width: 12px; height: 12px; border-radius: 50%; flex: none; transform: translateY(1px); }
.state--watch { background: rgba(140,198,63,.35); }
.state--alert { background: var(--ember); box-shadow: 0 0 12px var(--ember); }
.state--active { background: var(--leaf); box-shadow: 0 0 0 4px rgba(140,198,63,.2); }

/* Technology */
.tech { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line); }
.tech article { padding: 2.2rem 2.4rem 1.6rem 0; border-bottom: 1px solid var(--line); }
.tech article:nth-child(odd) { border-right: 1px solid var(--line); }
.tech article:nth-child(even) { padding-left: 2.4rem; }
.tech h3 { font-size: 1.45rem; font-weight: 400; margin-bottom: .7rem; }
.tech p { color: var(--fog); max-width: 30em; }

/* Upgrade band with landscape */
.band { position: relative; padding: clamp(6rem, 14vw, 10rem) 0; overflow: hidden; }
.band__img {
  position: absolute; inset: 0;
  background: url("assets/landscape.jpg") center 40% / cover no-repeat;
  filter: saturate(1.1);
}
.band__img::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(4,16,18,.94) 0%, rgba(4,16,18,.7) 55%, rgba(4,16,18,.35) 100%); }
.band__inner { position: relative; max-width: var(--wrap); }
.band h2 { max-width: 16em; }
.band p { color: #cfdad2; max-width: 34em; font-size: 1.15rem; margin-top: 1.4rem; }

/* Applications */
.apps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; }
.apps article {
  padding: 1.8rem 1.5rem 1.2rem;
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--canopy-2), rgba(16,48,42,.25));
  border-top: 3px solid var(--moss);
}
.apps article:first-child { border-top-color: var(--ember); }
.apps h3 { margin-bottom: .6rem; }
.apps p { color: var(--fog); font-size: .97rem; }
.serve { margin-top: 3.5rem; display: grid; grid-template-columns: 220px 1fr; gap: 2rem; padding-top: 2rem; border-top: 1px solid var(--line); }
.serve h3 { color: var(--leaf); }
.serve p { font-size: 1.2rem; color: var(--mist); max-width: 40em; }

/* Why Sylvora — the six words as a typographic block */
.why__title { margin-bottom: 2.5rem; }
.why { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 2.4rem 2rem; }
.why li { color: var(--fog); font-size: 1rem; }
.why span {
  display: block; font-family: var(--display); font-weight: 300;
  font-size: clamp(1.9rem, 3.4vw, 2.7rem); color: var(--mist); margin-bottom: .3rem;
}
.why li:nth-child(3n+1) span { color: var(--leaf); }
.why__goal { margin-top: 3.5rem; max-width: 42em; font-size: 1.15rem; color: #cfdad2; border-left: 3px solid var(--ember); padding-left: 1.3rem; }

/* About */
.mission { font-family: var(--display); font-weight: 300; font-size: clamp(1.4rem, 2.4vw, 1.85rem); line-height: 1.35; margin-top: 1.6rem; color: #d7e6d0; }
.team { display: flex; flex-wrap: wrap; gap: 2rem; }
.person { display: flex; align-items: center; gap: 1.3rem; margin: 0; }
.person__photo {
  position: relative; flex: none;
  width: 112px; height: 112px; border-radius: 50%; overflow: hidden;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--moss), var(--canopy-2));
  box-shadow: 0 0 0 2px var(--night), 0 0 0 4px var(--leaf), 0 12px 30px -10px rgba(242,106,27,.45);
}
.person__photo span { font-family: var(--display); font-size: 2.1rem; font-weight: 300; letter-spacing: .06em; padding-top: 6px; color: var(--mist); }
.person__photo img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.person figcaption { display: flex; flex-direction: column; gap: .15rem; }
.person strong { font-family: var(--display); font-weight: 600; font-size: 1.2rem; color: var(--mist); }
.person figcaption span { color: var(--fog); font-size: .98rem; }

/* Partners */
.partners { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; }
.partners div { border-top: 2px solid var(--leaf); padding-top: 1.2rem; }
.partners h3 { margin-bottom: .5rem; }
.partners p { color: var(--fog); font-size: .97rem; }

/* Contact */
.contact-info { list-style: none; padding: 0; margin: 2rem 0 0; }
.contact-info li { padding: .7rem 0; border-top: 1px solid var(--line); color: var(--fog); }
.contact-info a { font-size: 1.15rem; text-decoration: none; }
.form { display: grid; grid-template-columns: 1fr 1fr; gap: 1.1rem 1.2rem; background: var(--canopy); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(1.4rem, 3vw, 2.2rem); }
.field { display: flex; flex-direction: column; gap: .4rem; }
.field--full, .form__error, .form .btn { grid-column: 1 / -1; }
.form .btn { justify-self: start; }
label { font-size: .92rem; color: var(--fog); }
input, select, textarea {
  font: inherit; color: var(--mist);
  background: rgba(8,30,25,.7);
  border: 1px solid rgba(233,240,234,.16);
  border-radius: 10px; padding: .75rem .9rem;
}
input:hover, select:hover, textarea:hover { border-color: rgba(140,198,63,.45); }
textarea { resize: vertical; }
.hp { position: absolute; left: -9999px; }
.form__ok { grid-column: 1 / -1; margin: 0; color: var(--leaf); font-weight: 600; }
.form__error { color: #ff9a62; margin: 0; min-height: 1.2em; font-size: .95rem; }

/* Footer */
.footer { position: relative; padding: 9rem 0 2.5rem; text-align: center; background: linear-gradient(180deg, #0a231d, #061712 40%); overflow: hidden; }
.footer__trees { top: 0; bottom: auto; height: 110px; background-image: url("assets/treeline-near.svg"); opacity: .95; }
.footer__inner { position: relative; display: flex; flex-direction: column; align-items: center; }
.footer__logo { width: 260px; margin-bottom: 2rem; }
.footer__flow { font-family: var(--display); color: var(--fog); font-size: .98rem; display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: .3rem .8rem; }
.footer__flow i { display: inline-block; width: 18px; height: 1px; background: var(--leaf); }
.footer__line { font-family: var(--display); font-size: 1.3rem; margin: 1.8rem 0 .4rem; color: var(--ember); }
.footer__small { color: #6f8579; font-size: .85rem; margin: 0; }

/* ---------- Responsive ---------- */
@media (max-width: 1020px) {
  .hero__grid { grid-template-columns: 1fr; }
  .readout { justify-self: start; }
  .steps { grid-template-columns: repeat(3, 1fr); row-gap: 2.5rem; }
  .steps::before { display: none; }
  .apps, .partners { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 820px) {
  .nav__toggle { display: block; }
  .nav__links {
    position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; align-items: flex-start; gap: 0;
    background: rgba(4,16,18,.97); border-bottom: 1px solid var(--line);
    padding: .5rem 1.25rem 1.25rem; display: none;
  }
  .nav__links.is-open { display: flex; }
  .nav__links a:not(.btn) { padding: .8rem 0; width: 100%; border-bottom: 1px solid rgba(233,240,234,.06); }
  .nav__links .btn { margin-top: 1rem; }
  .split { grid-template-columns: 1fr; }
  .tech { grid-template-columns: 1fr; }
  .tech article, .tech article:nth-child(even) { padding: 1.8rem 0 1.2rem; border-right: 0; }
  .why { grid-template-columns: repeat(2, 1fr); }
  .serve { grid-template-columns: 1fr; gap: .8rem; }
  .hero__shade { background: linear-gradient(180deg, rgba(8,30,25,.5), rgba(8,30,25,.35) 60%, rgba(8,30,25,.1)); }
  .scene__near::after { height: 14%; }
  .scene__far { height: 18%; }
}
@media (max-width: 560px) {
  .steps, .apps, .partners, .why { grid-template-columns: 1fr; }
  .form { grid-template-columns: 1fr; }
  .brand__word { letter-spacing: .26em; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}