:root {
  --ink: #34374a;
  --body: #4a4e46;
  --bg: #eef1ec;
  --paper: #fdfdfb;
  --moss-700: #3f6b46;
  --moss-400: #83b389;
  --moss-100: #e3ecdf;
  --line: #d3dac9;
  --stamp: #b2402c;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Inter", -apple-system, "Segoe UI", Arial, sans-serif;
  background: var(--bg);
  color: var(--body);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 32px;
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}

.topbar .logo {
  height: 26px;
  display: block;
}

.crumb {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--moss-700);
}

main {
  max-width: 880px;
  padding: 56px 32px 80px;
}

.intro {
  margin-bottom: 40px;
}

.eyebrow {
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--moss-700);
  margin: 0 0 10px;
}

h1 {
  font-family: "IBM Plex Mono", monospace;
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0 0 10px;
}

.sub {
  margin: 0;
  font-size: 15px;
  color: var(--body);
  max-width: 46ch;
}

.index {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.file-card {
  display: flex;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 3px;
  text-decoration: none;
  color: inherit;
  box-shadow: 0 1px 2px rgba(52, 55, 74, 0.04);
  transition: box-shadow 0.15s ease, transform 0.15s ease, border-color 0.15s ease;
}

.file-card:hover {
  border-color: var(--moss-400);
  box-shadow: 0 6px 16px rgba(52, 55, 74, 0.08);
  transform: translateY(-1px);
}

.file-card .tab {
  flex: 0 0 6px;
  background: var(--moss-400);
  border-radius: 3px 0 0 3px;
}

.file-card-body {
  flex: 1;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 4px 18px;
  padding: 18px 22px;
}

.code {
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--moss-700);
  background: var(--moss-100);
  padding: 3px 8px;
  border-radius: 3px;
  grid-column: 1;
  grid-row: 1 / 3;
  align-self: center;
  justify-self: start;
}

.file-title {
  grid-column: 2;
  grid-row: 1;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

.file-desc {
  grid-column: 2;
  grid-row: 2;
  font-size: 13px;
  color: var(--body);
}

.go {
  grid-column: 3;
  grid-row: 1 / 3;
  font-family: "IBM Plex Mono", monospace;
  font-size: 12px;
  font-weight: 600;
  color: var(--moss-700);
  white-space: nowrap;
}

@media (max-width: 560px) {
  .file-card-body {
    grid-template-columns: 1fr;
    gap: 6px;
  }
  .code { grid-row: 1; }
  .file-title { grid-column: 1; grid-row: 2; }
  .file-desc { grid-column: 1; grid-row: 3; }
  .go { grid-column: 1; grid-row: 4; justify-self: start; margin-top: 6px; }
}