:root{--deep:#0b4f6c;--water:#1b8a9e;--green:#2f9e6b;--leaf:#e8f5ee;--sky:#eaf6f9;--ink:#1d2b33;--muted:#5b6b73}
*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--ink);line-height:1.6}
.wrap{max-width:1040px;margin:0 auto;padding:0 20px}
header.nav{background:#fff;border-bottom:1px solid #e3eef1;position:sticky;top:0;z-index:5}
header.nav .wrap{display:flex;justify-content:space-between;align-items:center;height:62px}
.logo{font-weight:800;font-size:1.35rem;color:var(--deep);text-decoration:none}.logo span{color:var(--green)}
nav a{margin-left:18px;color:var(--muted);text-decoration:none;font-size:.95rem}
.hero{background:linear-gradient(135deg,var(--deep),var(--water) 60%,var(--green));color:#fff;padding:80px 0 70px}
.hero h1{font-size:clamp(2rem,4.5vw,3rem);margin:0 0 14px;line-height:1.15}.hero p{font-size:1.15rem;max-width:640px;opacity:.95}
.btn{display:inline-block;padding:12px 22px;border-radius:8px;font-weight:700;text-decoration:none;border:0;cursor:pointer;font-size:1rem}
.btn-primary{background:var(--green);color:#fff}.btn-light{background:#fff;color:var(--deep)}.btn-outline{border:2px solid #fff;color:#fff;background:transparent}
.hero .btn{margin:10px 10px 0 0}
section{padding:64px 0}section.alt{background:var(--sky)}h2{color:var(--deep);font-size:1.9rem;margin-top:0}
.grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.card{background:#fff;border:1px solid #d9e9ee;border-radius:12px;padding:24px}
.facts .card h3{margin-top:0;color:var(--water)}
.quiz{background:#fff;border-radius:12px;padding:28px;border:1px solid #d9e9ee}
.q{padding:12px 0;border-bottom:1px solid #eef4f6}.q p{margin:0 0 6px;font-weight:600}
.q label{margin-right:16px;font-size:.95rem}
#result{display:none;margin-top:22px;padding:20px;border-radius:10px;background:var(--leaf)}
.score{font-size:2.2rem;font-weight:800;color:var(--green)}
.price{font-size:2.4rem;font-weight:800;color:var(--deep)}.tag{display:inline-block;background:var(--leaf);color:var(--green);font-weight:700;font-size:.8rem;padding:3px 10px;border-radius:20px}
.card ul{padding-left:20px}.featured{border:2px solid var(--green)}
form.inline{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}form.inline input{flex:1;min-width:200px;padding:11px;border:1px solid #c7dbe1;border-radius:8px;font-size:1rem}
details{background:#fff;border:1px solid #d9e9ee;border-radius:10px;padding:14px 18px;margin-bottom:10px}summary{font-weight:700;cursor:pointer;color:var(--deep)}
footer{background:var(--ink);color:#c9d6db;padding:40px 0;font-size:.88rem}footer a{color:#9fd8c0}
.todo{font-size:.8rem;color:#a3631b}
@media(max-width:640px){nav{display:none}.hero{padding:56px 0}}

.hero-photo{background:linear-gradient(rgba(8,30,45,.72),rgba(8,30,45,.62)),url(img/hero-pond-rain.jpg) center/cover no-repeat;background:linear-gradient(rgba(8,30,45,.72),rgba(8,30,45,.62)),image-set(url(img/hero-pond-rain.webp) type("image/webp"),url(img/hero-pond-rain.jpg) type("image/jpeg")) center/cover no-repeat}
.hero-photo h1,.hero-photo p{text-shadow:0 2px 8px rgba(0,0,0,.45)}
.split{display:grid;grid-template-columns:minmax(0,340px) 1fr;gap:28px;align-items:center;margin:28px 0}
.photo{margin:0}.photo img{width:100%;height:auto;max-height:460px;object-fit:cover;border-radius:12px;display:block}
.photo figcaption{font-size:.9rem;opacity:.75;margin-top:6px}
@media(max-width:640px){.split{grid-template-columns:1fr}}

.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:16px}.gallery figure{margin:0}.gallery img{width:100%;height:200px;object-fit:cover;border-radius:10px;display:block}.gallery figcaption{font-size:.92rem;margin-top:6px;font-weight:600}@media(max-width:800px){.gallery{grid-template-columns:repeat(2,1fr)}.gallery img{height:150px}}