:root {
  --steel: #3d5a80;
  --ice: #e0fbfc;
  --ink: #1b2838;
  --line: #98c1d9;
  --card: #ffffff;
  --deep: #293241;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--ice);
  font-family: Calibri, "Segoe UI", Candara, Arial, sans-serif;
  line-height: 1.7;
}

a {
  color: var(--steel);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.wrap {
  width: min(1100px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  background: var(--steel);
  color: #e0fbfc;
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 70px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #e0fbfc;
  font-size: 1.16rem;
  font-weight: 700;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  font-size: 0.92rem;
}

.nav a {
  color: #e0fbfc;
}

.hero {
  padding: 40px 0 24px;
}

.hero h1 {
  margin: 0 0 12px;
  max-width: 18em;
  color: var(--deep);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1.35;
}

.hero p {
  max-width: 42em;
  margin: 0;
}

.meters {
  display: grid;
  gap: 12px;
  margin-top: 22px;
  padding: 16px;
  background: var(--card);
  border: 1px solid var(--line);
}

.meter {
  display: grid;
  grid-template-columns: 120px 1fr 52px;
  gap: 10px;
  align-items: center;
  font-size: 0.92rem;
}

.track {
  height: 10px;
  background: #cfe7ea;
  border-radius: 99px;
  overflow: hidden;
}

.fill {
  height: 100%;
  background: var(--steel);
}

.fill.a { width: 86%; }
.fill.b { width: 64%; }
.fill.c { width: 42%; }

.panel {
  padding: 46px 0;
}

.panel:nth-of-type(odd) {
  background: #f3fdfe;
}

.panel h2 {
  margin: 0 0 14px;
  color: var(--steel);
  font-size: 1.42rem;
}

.lead {
  max-width: 46em;
  margin: 0 0 20px;
}

.happen,
.habits,
.limits {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.card,
.habit,
.limit {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 16px;
}

.card svg,
.habit svg,
.limit svg {
  color: var(--steel);
  margin-bottom: 8px;
}

.card h3,
.habit h3,
.limit h3 {
  margin: 0 0 8px;
  font-size: 1.04rem;
}

.card p,
.habit p,
.limit p {
  margin: 0;
}

.habits {
  grid-template-columns: repeat(4, 1fr);
}

.twin {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.twin article {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 16px;
}

.twin h3 {
  margin: 0 0 8px;
  color: var(--steel);
}

.compare {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
}

.compare th,
.compare td {
  border: 1px solid var(--line);
  padding: 11px 12px;
  text-align: left;
  vertical-align: top;
}

.compare th {
  background: var(--steel);
  color: #e0fbfc;
}

.compare td.ok {
  background: #d8f3dc;
}

.compare td.warn {
  background: #fff3bf;
}

.compare td.bad {
  background: #ffd6d6;
}

.faq-item {
  background: var(--card);
  border-left: 4px solid var(--steel);
  padding: 14px 16px;
  margin-bottom: 12px;
}

.faq-item h3 {
  margin: 0 0 8px;
}

.faq-item p {
  margin: 0;
}

.site-footer {
  background: var(--deep);
  color: #c5d5de;
  padding: 28px 0 36px;
  font-size: 0.92rem;
}

.site-footer p {
  margin: 0 0 8px;
  max-width: 46em;
}

@media (max-width: 820px) {
  .site-header .wrap,
  .happen,
  .habits,
  .limits,
  .twin,
  .meter {
    display: block;
  }

  .site-header {
    padding: 12px 0;
  }

  .fill {
    margin: 6px 0;
  }
}