/* Meshtastic Brasil — brand stylesheet (green-on-white identity) */
:root {
  --green:        #4DB06F;  /* primary brand green: buttons, banners, page bg */
  --green-bright: #5ACF82;  /* lighter accent green */
  --green-dark:   #2F8A52;  /* darker green: hovers, secondary buttons */
  --green-deep:   #1A3B25;  /* deepest green */
  --dark:         #414141;  /* header / footer */
  --ink:          #222222;  /* body headings text */
  --text:         #333333;  /* body text */
  --muted:        #6b7280;  /* secondary text */
  --bg-off:       #F9F9F9;  /* subtle off-white inside panels */
  --white:        #FFFFFF;
  --font-head: "Open Sans Condensed", "Arial Narrow", Arial, sans-serif;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --shell: 1100px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--green);          /* green page background */
  line-height: 1.6;
  padding-bottom: 48px;              /* green strip below footer */
}
img { max-width: 100%; display: block; }
h1, h2, h3 { font-family: var(--font-head); font-weight: 700; line-height: 1.08; color: var(--ink); }
a { color: var(--green-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---- centering helper (header, footer, inner-page rows) ---- */
.container { width: min(var(--shell), 92%); margin: 0 auto; }

/* ---- header ---- */
.site-header { position: sticky; top: 0; background: var(--dark); z-index: 50; box-shadow: 0 2px 6px rgba(0,0,0,.25); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.nav__logo img { height: 40px; }
.nav__links { display: flex; gap: 28px; list-style: none; }
.nav__links a { color: #fff; font-family: var(--font-head); font-size: 20px; }
.nav__links a:hover { color: var(--green-bright); text-decoration: none; }
.nav__toggle { display: none; background: none; border: 0; color: #fff; font-size: 28px; cursor: pointer; line-height: 1; }

/* ---- white content panels (index .panel + inner-page .section) ---- */
.panel, .section {
  background: var(--white);
  width: min(var(--shell), 94%);
  margin: 22px auto;
  border-radius: 8px;
  padding: 40px 44px;
  box-shadow: 0 2px 10px rgba(0,0,0,.10);
}
/* neutralize nested .container inside a panel/section so it doesn't re-constrain */
.panel .container, .section .container { width: auto; max-width: none; margin: 0; padding: 0; }
.block + .block { margin-top: 40px; padding-top: 36px; border-top: 1px solid #eee; }
.center { text-align: center; }

/* ---- full-width green banner headings ---- */
.banner {
  color: #fff;
  background: var(--green);
  text-align: center;
  font-style: italic;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(28px, 4vw, 44px);
  padding: 26px 16px;
  margin: 0;
}

/* ---- hero ---- */
.hero__sub { color: var(--muted); font-size: 15px; margin-bottom: 6px; }
.hero h1 { font-size: clamp(34px, 5vw, 60px); margin-bottom: 18px; }
.hero h1 .os { color: var(--green-bright); }
.hero h1 .og { color: var(--green); font-style: italic; }
.hero h1 .pv { color: var(--ink); }
.hero p { max-width: 760px; margin-bottom: 18px; }

/* ---- buttons ---- */
.btn {
  display: inline-block;
  padding: 12px 26px;
  border-radius: 6px;
  background: var(--green);
  color: #fff;
  font-family: var(--font-head);
  font-size: 18px;
  letter-spacing: .3px;
  margin: 4px 6px 4px 0;
  border: 2px solid var(--green);
  transition: background .15s, border-color .15s;
}
.btn:hover { background: var(--green-dark); border-color: var(--green-dark); text-decoration: none; }
.btn--navy { background: var(--dark); border-color: var(--dark); }   /* secondary dark */
.btn--navy:hover { background: #2c2c2c; border-color: #2c2c2c; }
.btn--blue { background: var(--green-dark); border-color: var(--green-dark); }  /* secondary green */
.btn--blue:hover { background: var(--green-deep); border-color: var(--green-deep); }
.btn--ghost { background: transparent; color: var(--green-dark); }
.btn--ghost:hover { background: var(--green); color: #fff; }

/* ---- generic section headings (inside white panels) ---- */
.panel h2, .section h2 { color: var(--green-dark); font-size: clamp(26px, 3.4vw, 38px); margin-bottom: 14px; }
.panel h2.gi, .section h2.gi { font-style: italic; }

/* ---- map section ---- */
.map-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: center; }
.map-grid img { border-radius: 8px; box-shadow: 0 2px 10px rgba(0,0,0,.12); width: 100%; }

/* ---- MQTT config block ---- */
.mqtt-pre {
  background: var(--green-deep); color: #d6f5e1;
  padding: 18px 20px; border-radius: 8px; overflow: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 14px;
  margin: 12px 0;
}

/* ---- social row ---- */
.social { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.social a img { width: 40px; height: 40px; border-radius: 50%; }

/* ---- cards grid ---- */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.cards--2 { grid-template-columns: 1fr 1fr; }
.card { background: var(--bg-off); padding: 24px; border-radius: 8px; }
.card h3 { color: var(--ink); margin-bottom: 8px; font-size: 22px; }
.card img { border-radius: 6px; margin-bottom: 12px; width: 100%; }

/* ---- feature cards with icons ---- */
.feature { text-align: center; background: var(--bg-off); padding: 26px 18px; border-radius: 8px; }
.feature__icon { width: 56px; height: 56px; margin: 0 auto 14px; color: var(--green); }
.feature__icon svg { width: 100%; height: 100%; display: block; }
.feature h3 { color: var(--green-dark); margin-bottom: 8px; }

/* ---- newsletter ---- */
.news-form { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin-top: 12px; }
.news-form input { padding: 12px 14px; border: 1px solid #cfcfcf; border-radius: 6px; min-width: 260px; font-size: 15px; }

/* ---- carousel ---- */
.carousel { position: relative; display: flex; align-items: center; gap: 8px; }
.carousel__viewport { overflow: hidden; flex: 1 1 auto; }
.carousel__track { display: flex; transition: transform .4s ease; }
.carousel__slide { min-width: 100%; }
.carousel__slide iframe { width: 100%; aspect-ratio: 16/9; border: 0; border-radius: 8px; }
.carousel__prev, .carousel__next {
  flex: 0 0 auto; font-size: 30px; line-height: 1;
  background: var(--green); color: #fff; border: 0; border-radius: 50%;
  width: 44px; height: 44px; cursor: pointer;
}
.carousel__prev:hover, .carousel__next:hover { background: var(--green-dark); }

/* ---- footer ---- */
.site-footer { background: var(--dark); color: #cdd2d6; padding: 44px 0; font-size: 14px; }
.site-footer .container > * + * { margin-top: 10px; }
.site-footer a { color: #cdd2d6; }
.site-footer a:hover { color: var(--green-bright); }
.footer-fine { font-size: 12px; color: #9aa0a6; }

/* ---- responsive ---- */
@media (max-width: 860px) {
  .cards { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav__links {
    display: none; position: absolute; top: 72px; left: 0; right: 0;
    background: var(--dark); flex-direction: column; padding: 16px 20px; gap: 16px;
    box-shadow: 0 6px 10px rgba(0,0,0,.25);
  }
  .nav__links.is-open { display: flex; }
  .nav__toggle { display: block; }
  .panel, .section { padding: 28px 22px; }
  .map-grid { grid-template-columns: 1fr; }
  .cards, .cards--2 { grid-template-columns: 1fr; }
}