:root {
  --teal: #0f766e;
  --teal-dark: #115e59;
  --ink: #1a2433;
  --slate: #475569;
  --muted: #64748b;
  --bg-alt: #f0fdfa;
  --line: #e2e8f0;
  --accent: #0d9488;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Segoe UI', Arial, Helvetica, sans-serif;
  color: var(--ink);
  line-height: 1.6;
}

.container { max-width: 1000px; margin: 0 auto; padding: 0 24px; }

/* Header */
header {
  background: #fff;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
}

.logo { font-size: 20px; font-weight: 800; letter-spacing: 1px; color: var(--teal); }
.logo span { color: var(--ink); font-weight: 400; }

nav a { margin-left: 24px; text-decoration: none; color: var(--slate); font-size: 14px; }
nav a:hover { color: var(--teal); }

/* Buttons */
.btn {
  display: inline-block;
  background: var(--teal);
  color: #fff !important;
  padding: 8px 18px;
  border-radius: 6px;
  font-weight: 600;
  text-decoration: none;
}
.btn:hover { background: var(--teal-dark); }
.btn-lg { padding: 14px 28px; font-size: 16px; margin-top: 24px; }

/* Hero */
.hero {
  background: linear-gradient(180deg, #f0fdfa 0%, #ffffff 100%);
  padding: 90px 0 70px;
  text-align: center;
}

.hero h1 { font-size: 40px; line-height: 1.2; margin-bottom: 20px; }
.hero .accent { color: var(--accent); }
.hero p { font-size: 17px; color: var(--slate); max-width: 720px; margin: 0 auto; }

/* Sections */
.section { padding: 70px 0; }
.section.alt { background: var(--bg-alt); }
.section h2 { font-size: 28px; margin-bottom: 36px; text-align: center; }
.section .lead { text-align: center; color: var(--slate); max-width: 640px; margin: 0 auto 30px; }

/* Grid / cards */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 28px 24px;
}

.card h3 { color: var(--teal); font-size: 16px; text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 12px; }
.card p { color: var(--slate); font-size: 15px; }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; text-align: center; }

.step .num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--teal);
  color: #fff;
  font-weight: 700;
  font-size: 18px;
  margin-bottom: 12px;
}

.step h3 { font-size: 16px; margin-bottom: 6px; }
.step p { color: var(--muted); font-size: 14px; }

/* Why list */
.why-list { max-width: 640px; margin: 0 auto; list-style: none; }

.why-list li {
  padding: 14px 0 14px 34px;
  position: relative;
  border-bottom: 1px solid var(--line);
  color: var(--slate);
  font-size: 16px;
}

.why-list li:last-child { border-bottom: none; }

.why-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--teal);
  font-weight: 700;
  font-size: 18px;
}

/* Contact */
.contact-box {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 28px;
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
}

.contact-box p { margin-bottom: 8px; }
.contact-box a { color: var(--teal); text-decoration: none; }
.contact-box .small { color: var(--muted); font-size: 13px; }

/* Footer */
footer { background: var(--ink); color: #cbd5e1; padding: 28px 0; text-align: center; font-size: 14px; }

/* Responsive */
@media (max-width: 768px) {
  .grid, .steps { grid-template-columns: 1fr; }
  .hero h1 { font-size: 30px; }
  nav a { margin-left: 14px; }
}