:root {
  --ink: #102d4b;
  --muted: #667672;
  --green: #217857;
  --green-dark: #14583f;
  --mint: #edf8f1;
  --mint-strong: #dcefe4;
  --line: #d1e1d9;
  --white: #fff;
  font-family: Arial, Helvetica, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: linear-gradient(135deg, #e7f5ed 0%, #f8fbf9 100%);
}

a { color: inherit; }

.page-shell {
  width: min(1120px, calc(100% - 48px));
  min-height: 100vh;
  margin: 0 auto;
  padding: 76px 0 34px;
}

.eyebrow, .section-kicker, .resource-kicker {
  margin: 0;
  color: var(--green-dark);
  font-size: .74rem;
  font-weight: 800;
  letter-spacing: .16em;
  text-transform: uppercase;
}

h1, h2, p { margin-top: 0; }

h1 {
  max-width: 780px;
  margin-bottom: 10px;
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: .96;
  letter-spacing: -.065em;
}

.intro {
  max-width: 720px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.12rem;
  line-height: 1.55;
}

.suggestions {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: .9rem;
}

.suggestions a {
  color: var(--green-dark);
  font-weight: 700;
}

.site-header { margin-bottom: 42px; }

.resource-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.resource-card {
  position: relative;
  display: flex;
  min-height: 250px;
  flex-direction: column;
  padding: 26px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-left: 4px solid var(--green);
  border-radius: 12px;
  background: rgba(255, 255, 255, .9);
  box-shadow: 0 8px 24px rgba(16, 45, 75, .06);
  text-decoration: none;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}

.resource-card::after {
  position: absolute;
  right: -70px;
  bottom: -90px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: var(--mint);
  content: "";
}

.resource-card:hover, .resource-card:focus-visible {
  border-color: var(--green);
  box-shadow: 0 14px 32px rgba(16, 45, 75, .12);
  transform: translateY(-4px);
}

.resource-card--disabled {
  cursor: not-allowed;
  opacity: .72;
}

.resource-card--disabled::after { background: #edf2ef; }
.resource-card--disabled:hover { border-color: var(--line); box-shadow: 0 8px 24px rgba(16, 45, 75, .06); transform: none; }
.resource-card--disabled .resource-icon { background: #7d9188; }
.resource-card--disabled .resource-link { color: var(--muted); }

.resource-card:focus-visible, .file-grid a:focus-visible, .back-link:focus-visible {
  outline: 3px solid #87c7a8;
  outline-offset: 4px;
}

.resource-icon {
  z-index: 1;
  display: grid;
  width: 40px;
  height: 40px;
  margin-bottom: 32px;
  place-items: center;
  border-radius: 50%;
  color: var(--white);
  background: var(--ink);
  font-size: 1.35rem;
}

.resource-icon--track { background: var(--green); }
.resource-icon--belt { background: #7b6b45; }
.resource-icon--oil { background: #6d637e; }
.resource-icon svg {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}
.resource-card strong, .resource-description, .resource-link { z-index: 1; }

.resource-card strong {
  margin: 9px 0 10px;
  font-size: 1.85rem;
  letter-spacing: -.045em;
}

.resource-description {
  max-width: 330px;
  color: var(--muted);
  line-height: 1.5;
}

.resource-link {
  margin-top: auto;
  padding-top: 30px;
  color: var(--green-dark);
  font-size: .9rem;
  font-weight: 800;
}

.resource-link span, .file-grid a span { margin-left: 8px; }

.site-footer {
  display: flex;
  justify-content: space-between;
  margin-top: 82px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .78rem;
}

.site-footer a { color: var(--green-dark); font-weight: 700; text-decoration: none; }

.subpage-header { margin-bottom: 44px; }
.back-link {
  display: inline-block;
  margin-bottom: 52px;
  color: var(--green-dark);
  font-size: .9rem;
  font-weight: 800;
  text-decoration: none;
}

.file-panel {
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, .78);
  box-shadow: 0 8px 24px rgba(16, 45, 75, .05);
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 24px;
}

.section-heading h2 {
  margin: 8px 0 0;
  font-size: 1.8rem;
  letter-spacing: -.04em;
}

.file-count {
  padding: 8px 12px;
  border-radius: 20px;
  color: var(--green-dark);
  background: var(--mint-strong);
  font-size: .8rem;
  font-weight: 800;
}

.file-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.file-grid a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 58px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--white);
  color: var(--ink);
  font-size: .9rem;
  font-weight: 700;
  text-decoration: none;
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}

.file-grid a:hover {
  border-color: var(--green);
  color: var(--green-dark);
  background: var(--mint);
}

@media (max-width: 760px) {
  .page-shell { width: min(100% - 32px, 620px); padding-top: 42px; }
  .site-header { margin-bottom: 38px; }
  h1 { font-size: clamp(2.25rem, 12vw, 3.6rem); }
  .intro { font-size: 1rem; }
  .suggestions { font-size: .8rem; line-height: 1.45; }
  .resource-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .file-grid { grid-template-columns: 1fr; }
  .resource-card { min-height: 190px; padding: 17px; }
  .resource-card::after { width: 130px; height: 130px; right: -44px; bottom: -52px; }
  .resource-icon { width: 34px; height: 34px; margin-bottom: 20px; }
  .resource-icon svg { width: 19px; height: 19px; }
  .resource-card strong { margin: 6px 0 7px; font-size: 1.25rem; }
  .resource-description { font-size: .78rem; line-height: 1.35; }
  .resource-link { padding-top: 14px; font-size: .72rem; }
  .file-panel { padding: 22px; }
  .site-footer { margin-top: 50px; }
}