main { overflow: hidden; }
:focus-visible { outline: 3px solid #111; outline-offset: 3px; }
.page-hero, .page-section { padding: clamp(3rem, 7vw, 6rem) 0; }
.page-hero { background: var(--color-secondary); }
.page-hero h1 { max-width: 900px; font-size: clamp(2.35rem, 5vw, 4.5rem); line-height: 1.1; }
.page-lead { max-width: 780px; font-size: 1.15rem; }
.content-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.25rem; }
.content-card { padding: clamp(1.25rem, 3vw, 2rem); border: 1px solid #cfe9f8; border-radius: 1rem; background: #fff; }
.content-card h2, .content-card h3 { font-size: 1.35rem; }
.prose { max-width: 850px; }
.prose h2 { margin-top: 2.5rem; font-size: clamp(1.65rem, 3vw, 2.4rem); }
.prose h3 { margin-top: 1.5rem; }
.prose ul, .prose ol { margin: 0 0 1.25rem 1.25rem; }
.prose li + li { margin-top: .45rem; }
.learning-step { border-top: 5px solid var(--color-heading); }
.learning-step-illustration { display: grid; aspect-ratio: 4 / 3; margin: 1rem 0 1.5rem; place-items: center; overflow: hidden; border-radius: .75rem; background: var(--color-secondary); }
.learning-step-illustration img { width: 100%; height: 100%; object-fit: contain; }
.problem-card strong { display: block; margin-top: .8rem; }
.faq details { padding: 1rem 0; border-bottom: 1px solid #cfe9f8; }
.faq summary { cursor: pointer; font-family: var(--font-heading); font-weight: 700; }
.contact-action { padding: 2rem; border-radius: 1rem; background: var(--color-primary); color: #fff; }
.contact-action h2, .contact-action p { color: #fff; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1.5rem; }
@media (max-width: 480px) { .cta-actions { align-items: stretch; flex-direction: column; } .cta-actions .button { width: 100%; } }
@media (max-width: 760px) { .content-grid { grid-template-columns: 1fr; } }