:root {
  --green: #00C853;
  --green-dark: #009e44;
  --green-soft: #e6f9ee;
  --cyan: #00bcd4;
  --ink: #10241c;
  --muted: #5a6b63;
  --bg: #ffffff;
  --bg-alt: #f4fbf7;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(0, 200, 83, 0.12);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}
.container { width: min(1100px, 92%); margin: 0 auto; }
a { color: inherit; text-decoration: none; }

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn-primary { background: var(--green); color: #fff; box-shadow: var(--shadow); }
.btn-primary:hover { background: var(--green-dark); transform: translateY(-2px); }
.btn-ghost { background: transparent; color: var(--green-dark); border: 2px solid var(--green); }
.btn-ghost:hover { background: var(--green-soft); }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #eaf4ef;
}
.nav { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
.brand { font-weight: 800; font-size: 1.4rem; color: var(--green-dark); display: flex; align-items: center; gap: 6px; }
.brand-mark { font-size: 1.3rem; }
.nav-links { display: flex; align-items: center; gap: 22px; }
.nav-links a { font-weight: 500; color: var(--ink); }
.nav-links a:hover { color: var(--green-dark); }
.nav-toggle { display: none; background: none; border: none; font-size: 1.6rem; cursor: pointer; color: var(--green-dark); }

/* Hero */
.hero {
  background: radial-gradient(1200px 500px at 80% -10%, var(--green-soft), transparent),
              linear-gradient(180deg, #ffffff, var(--bg-alt));
  padding: 70px 0 60px;
}
.hero-inner { display: grid; grid-template-columns: 1.2fr .8fr; gap: 40px; align-items: center; }
.badge {
  display: inline-block; background: var(--green-soft); color: var(--green-dark);
  padding: 6px 14px; border-radius: 999px; font-size: .85rem; font-weight: 600; margin-bottom: 18px;
}
.hero h1 { font-size: clamp(2rem, 4vw, 3.2rem); line-height: 1.1; margin-bottom: 18px; }
.lead { color: var(--muted); font-size: 1.1rem; max-width: 520px; margin-bottom: 26px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-visual {
  position: relative; display: grid; place-items: center; min-height: 280px;
  background: linear-gradient(135deg, var(--green), var(--cyan));
  border-radius: 28px; box-shadow: var(--shadow);
}
.charge-icon { font-size: 5rem; color: #fff; z-index: 2; }
.pulse-ring {
  position: absolute; width: 140px; height: 140px; border-radius: 50%;
  border: 3px solid rgba(255,255,255,.7); animation: pulse 2.4s ease-out infinite;
}
@keyframes pulse {
  0% { transform: scale(.6); opacity: .9; }
  100% { transform: scale(1.6); opacity: 0; }
}

/* Stats */
.stats { background: var(--green-dark); color: #fff; padding: 38px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; text-align: center; }
.stat-num { display: block; font-size: 2rem; font-weight: 800; }
.stat-label { font-size: .95rem; opacity: .9; }

/* Sections */
.section { padding: 72px 0; }
.section-alt { background: var(--bg-alt); }
.section-title { font-size: clamp(1.6rem, 3vw, 2.4rem); margin-bottom: 10px; }
.section-title.left { text-align: left; }
.section-sub { color: var(--muted); margin-bottom: 38px; }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.card {
  background: #fff; border: 1px solid #eaf4ef; border-radius: var(--radius);
  padding: 26px 22px; transition: transform .2s ease, box-shadow .2s ease;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.card-icon { font-size: 2rem; margin-bottom: 12px; }
.card h3 { margin-bottom: 8px; font-size: 1.15rem; }
.card p { color: var(--muted); font-size: .95rem; }

/* Why */
.why-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.why { background: #fff; padding: 24px; border-radius: var(--radius); border: 1px solid #eaf4ef; }
.why h4 { margin-bottom: 8px; color: var(--green-dark); }
.why p { color: var(--muted); font-size: .95rem; }

/* About */
.about { display: grid; grid-template-columns: 1.4fr .8fr; gap: 40px; align-items: start; }
.about-text p { color: var(--muted); margin-bottom: 16px; }
.about-card { background: var(--green-soft); padding: 26px; border-radius: var(--radius); }
.about-card h4 { color: var(--green-dark); margin: 14px 0 6px; }
.about-card h4:first-child { margin-top: 0; }
.about-card p { color: var(--ink); font-size: .95rem; }

/* Contact */
.contact { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-list { list-style: none; margin-top: 18px; }
.contact-list li { margin-bottom: 10px; color: var(--muted); }
.contact-list a { color: var(--green-dark); font-weight: 600; }
.contact-form { display: flex; flex-direction: column; gap: 14px; background: #fff; padding: 26px; border-radius: var(--radius); border: 1px solid #eaf4ef; }
.contact-form label { display: flex; flex-direction: column; font-size: .9rem; font-weight: 600; color: var(--ink); gap: 6px; }
.contact-form input, .contact-form textarea {
  padding: 12px 14px; border: 1px solid #d7e7df; border-radius: 10px; font: inherit; resize: vertical;
}
.contact-form input:focus, .contact-form textarea:focus { outline: 2px solid var(--green); border-color: var(--green); }
.form-note { color: var(--green-dark); font-weight: 600; }

/* Footer */
.site-footer { background: var(--ink); color: #cfe9dd; padding: 26px 0; }
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: .9rem; }

/* Responsive */
@media (max-width: 880px) {
  .nav-links {
    position: absolute; top: 64px; right: 4%; flex-direction: column; align-items: flex-start;
    background: #fff; padding: 18px 22px; border-radius: 14px; box-shadow: var(--shadow);
    display: none; gap: 14px; min-width: 200px;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .hero-inner, .about, .contact { grid-template-columns: 1fr; }
  .hero-visual { min-height: 220px; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  .cards { grid-template-columns: 1fr; }
}