:root {
  --ink: #0d1b2a;
  --ink-soft: #41546b;
  --bg: #f6f9fb;
  --card: #ffffff;
  --line: #dbe5ee;
  --accent: #0f766e;
  --accent-dark: #0b5d57;
  --hero-bg: #0d1b2a;
  --hero-ink: #eef5f9;
  --radius: 14px;
  --wrap: 1080px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
.wrap.narrow { max-width: 640px; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(246, 249, 251, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { font-weight: 700; font-size: 1.05rem; color: var(--ink); text-decoration: none; letter-spacing: -0.01em; }
.brand span { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 18px; }
.nav-links a:not(.btn) { color: var(--ink-soft); text-decoration: none; font-size: 0.95rem; }
.nav-links a:not(.btn):hover { color: var(--ink); }

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-small { padding: 8px 14px; font-size: 0.9rem; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-ghost { border-color: rgba(238, 245, 249, 0.4); color: var(--hero-ink); }
.btn-ghost:hover { border-color: rgba(238, 245, 249, 0.8); }

/* Hero */
.hero {
  background: var(--hero-bg);
  color: var(--hero-ink);
  padding: 84px 0 76px;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 44px 44px;
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.78rem;
  font-weight: 600;
  color: #7fd1c5;
  margin-bottom: 18px;
}
.hero h1 {
  font-size: clamp(2rem, 5.5vw, 3.3rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}
.hero .lede { font-size: clamp(1.05rem, 2vw, 1.2rem); color: #b9cbda; max-width: 34em; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.micro { margin-top: 16px; font-size: 0.85rem; color: #8ba3b8; }

/* Sections */
section { padding: 72px 0; }
h2 {
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  letter-spacing: -0.015em;
  margin-bottom: 34px;
}
.lede { color: var(--ink-soft); max-width: 36em; }

/* Problem cards */
.problem { background: var(--card); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.cards { display: grid; grid-template-columns: 1fr; gap: 18px; }
.card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
}
.card h3 { margin-bottom: 10px; font-size: 1.1rem; }
.card p { color: var(--ink-soft); font-size: 0.97rem; }

/* Steps */
.steps { display: grid; grid-template-columns: 1fr; gap: 18px; counter-reset: step; list-style: none; }
.steps li {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  counter-increment: step;
  position: relative;
}
.steps li::before {
  content: counter(step);
  position: absolute;
  top: 22px;
  right: 24px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.steps h3 { margin-bottom: 8px; font-size: 1.1rem; }
.steps p { color: var(--ink-soft); font-size: 0.97rem; max-width: 26em; }

/* Check form */
.check { background: var(--card); border-top: 1px solid var(--line); }
.check .lede { margin-bottom: 30px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-weight: 600; font-size: 0.95rem; margin-bottom: 8px; }
.field select, .row input {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: 1rem;
  background: var(--bg);
  color: var(--ink);
  font-family: inherit;
}
.field select:focus, .row input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: transparent;
}
.row { display: grid; grid-template-columns: 1fr; gap: 12px; margin-bottom: 18px; }
.check .btn { width: 100%; }
.form-status { margin-top: 16px; font-size: 0.95rem; color: var(--accent-dark); min-height: 1.4em; }

/* Footer */
.site-footer { background: var(--hero-bg); color: #8ba3b8; padding: 36px 0; font-size: 0.9rem; }
.site-footer p { margin-bottom: 8px; }
.site-footer strong { color: var(--hero-ink); }
.site-footer a { color: #7fd1c5; }

/* Tablet and up */
@media (min-width: 720px) {
  .cards { grid-template-columns: repeat(3, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .row { grid-template-columns: 1fr 1fr; }
  .check .btn { width: auto; padding: 14px 34px; }
}