* { box-sizing: border-box; margin: 0; padding: 0; }
:root{
  --green:#2e7d32; --green-dark:#1b5e20; --bg:#f7f9f8; --text:#222;
  --muted:#6b7280; --card:#ffffff; --shadow:0 6px 20px rgba(0,0,0,.08);
  --accent:#11a36c; --hl:#ff5252;
}
body{ font-family: system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  background:var(--bg); color:var(--text); line-height:1.75; }


.site-header{ position:sticky; top:0; z-index:50; display:flex; align-items:center; justify-content:space-between;
  gap:16px; padding:14px 28px; background:var(--green); color:#fff; }
.brand{ display:flex; align-items:center; gap:10px; font-weight:700; letter-spacing:.3px; }
.logo{ font-size:22px; }
.brand-text{ font-size:18px; }
.navbar{ display:flex; gap:18px; flex-wrap:wrap; }
.nav-link{ color:#fff; text-decoration:none; font-weight:600; padding:6px 10px; border-radius:8px; transition:all .25s; }
.nav-link:hover{ background:rgba(255,255,255,.15); }
.nav-link.active{ background:rgba(255,255,255,.25); }
.mode-toggle{ background:#fff; color:var(--green); border:none; padding:8px 12px; border-radius:999px; font-weight:700; cursor:pointer; }


.banner{ position:relative; height:360px; background:url('https://images.unsplash.com/photo-1500530855697-b586d89ba3ee?w=1600&q=80') center/cover no-repeat; display:none; }
.banner[data-banner-for="home"]{ display:block; }
.banner-overlay{ position:absolute; inset:0; background:linear-gradient( to bottom, rgba(0,0,0,.35), rgba(0,0,0,.55) ); color:#fff;
  display:flex; flex-direction:column; align-items:center; justify-content:center; text-align:center; padding:20px; }
.banner h1{ font-size:40px; margin-bottom:10px; } h1:hover{ color: hsl(29, 58%, 66%);}
.banner p{ opacity:.95; max-width:760px; } p:hover{ color: #0b7d53;}
.cta{ margin-top:16px; display:inline-block; background:#ffffff; color:var(--green); padding:10px 16px; border-radius:10px; font-weight:700; text-decoration:none; }


main{ max-width:1200px; margin:auto; padding:30px 16px 60px; }
.page{ display:none; animation:fade .4s ease; }
.page.active{ display:block; }
@keyframes fade{ from{opacity:.0; transform:translateY(8px);} to{opacity:1; transform:none;} }
.section-title{ font-size:30px; margin:20px 0 16px; color:var(--green-dark); text-align:center; }


.cards{ margin-top:22px; display:grid; grid-template-columns:repeat(auto-fit, minmax(260px,1fr)); gap:18px; }
.card{ background:var(--card); border-radius:14px; padding:18px; box-shadow:var(--shadow); transition:transform .2s, box-shadow .2s; }
.card:hover{ transform:translateY(-4px); box-shadow:0 10px 28px rgba(0,0,0,.12); }
.card h3{ margin-bottom:8px; }


.about-grid{ display:grid; grid-template-columns:repeat(auto-fit,minmax(260px,1fr)); gap:18px; margin:18px 0 28px; }
.callout{ background:var(--card); border-left:6px solid var(--accent); border-radius:10px; padding:16px; box-shadow:var(--shadow); }
.callout h3{ margin-bottom:8px; }
.hl{ color:var(--hl); font-weight:800; }
.problem-board{ background:#e8f5e9; border:1px solid #d9efe0; border-radius:16px; padding:18px; box-shadow:var(--shadow); }
.problem-board h3{ color:var(--green-dark); margin-bottom:10px; text-align:center; }
.problem{ background:#f4fbf6; border-radius:12px; padding:14px; margin:12px 0; border:1px dashed #b9e2c6; }
.problem h4{ color:#0b7d53; margin-bottom:6px; }
.bullets{ margin-left:18px; margin-top:6px; }
.bullets li{ margin:4px 0; list-style:'✓  '; }

.quote{ margin:22px auto; max-width:900px; font-style:italic; background:#f0f7f4; border-left:6px solid var(--green-dark); padding:14px; border-radius:10px; text-align:center; }
.impact-strip{ display:grid; grid-template-columns:repeat(4,1fr); gap:12px; margin-top:16px;}
.impact-strip div{ background:var(--card); border-radius:12px; padding:14px; text-align:center; box-shadow:var(--shadow); }
.impact-strip strong{ display:block; font-size:22px; color:var(--green-dark); }
.impact-strip span{ color:var(--muted); }


.blog-post{ background:var(--card); border-radius:14px; padding:18px; box-shadow:var(--shadow); margin:16px 0; }
.blog-post h3{ color:var(--green-dark); margin-bottom:8px; }
.steps{ margin-left:18px; margin-top:6px; }
.steps li{ list-style:'•  '; margin:6px 0; }


.gallery-grid{ display:grid; grid-template-columns:repeat(auto-fit, minmax(240px,1fr)); gap:16px; margin-top:8px; }
.tile{ position:relative; overflow:hidden; border-radius:14px; box-shadow:var(--shadow); background:#dff2e7; }
.tile img{ width:1000px; height:320px; object-fit: cover; display: inline; transition:transform .35s ease; }
.tile:hover img{ transform:scale(1.06); }
.tile figcaption{ position:absolute; inset:auto 0 0 0; background:linear-gradient(180deg, rgba(0,0,0,.0), rgba(0,0,0,.65)); color:#fff; padding:10px 12px; font-weight:700; }


.lead{ text-align:center; max-width:900px; margin:0 auto 14px; color:var(--muted); }
.contact-form{ max-width:680px; margin:0 auto; background:var(--card); padding:18px; border-radius:14px; box-shadow:var(--shadow); }
.field{ display:flex; flex-direction:column; gap:6px; margin-bottom:12px; }
label{ font-weight:700; }
input, select, textarea{ border:1px solid #cfd8d3; border-radius:10px; padding:10px 12px; font:inherit; background:#fff; }
.btn-primary{ background:var(--green); color:#fff; border:none; padding:12px 16px; border-radius:12px; cursor:pointer; font-weight:800; }
.btn-primary:hover{ background:var(--green-dark); }
.toast{ position:fixed; right:18px; bottom:18px; background:#111; color:#fff; padding:12px 14px; border-radius:12px; box-shadow:var(--shadow); }


.site-footer{ text-align:center; padding:18px; color:#fff; background:var(--green); margin-top:40px; }


body.dark{ --bg:#111418; --text:#e6e8ea; --card:#161b20; --muted:#b4bcc6; --shadow:0 6px 20px rgba(0,0,0,.45); }
body.dark .site-header{ background:var(--green-dark); }
body.dark .banner-overlay{ background:linear-gradient( to bottom, rgba(0,0,0,.45), rgba(0,0,0,.7) ); }
body.dark .cta{ background:#1f2937; color:#d1fae5; }
body.dark .problem-board{ background:#0f1a13; border-color:#1f3b2a; }
body.dark .problem{ background:#0c1510; border-color:#265f44; }
body.dark .quote{ background:#0e1612; }
body.dark input, body.dark select, body.dark textarea{ background:#0f1419; color:#e6e8ea; border-color:#2a3440; }
body.dark .toast{ background:#0f172a; }


@media (max-width:720px){
  .banner h1{ font-size:32px; }
  .impact-strip{ grid-template-columns:repeat(2,1fr); }
}