.class-home { padding-top: 36px; }
.class-home h1 { margin: 0 0 24px; font-size: 36px; }
.exercise-tiles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.exercise-tile { display: block; min-width: 0; padding: 28px; color: var(--ink); text-decoration: none; background: rgba(255, 255, 255, .82); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.exercise-tile h2 { margin: 0 0 16px; font-size: 26px; }
.exercise-tile p { margin: 0; color: var(--muted); font-size: 18px; line-height: 1.6; }
.exercise-tile:hover { border-color: #409e81; }
.exercise-tile:focus-visible { outline: 3px solid #409e81; outline-offset: 4px; }
@media (max-width: 900px) {
  .exercise-tiles { grid-template-columns: minmax(0, 1fr); }
  .class-home { padding-top: 18px; }
}