.quiz-shell:has(.landing) { padding: 0; }
.landing { width: 100%; max-width: 1280px; padding: 0 48px; }
.landing a { text-decoration: none; }
.landing-nav { min-height: 88px; display: flex; align-items: center; justify-content: space-between; gap: 16px; border-bottom: 1px solid #e6e4e1; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: #202020; font-weight: 700; font-size: 24px; letter-spacing: -.7px; }
.brand-mark { width: 34px; height: 36px; display: inline-grid; place-items: center; border: 2px solid; border-radius: 6px; font: bold 28px Georgia, serif; }
.landing-login { color: #202020; font-size: 14px; padding: 10px 14px; border: 1px solid #d6d2cd; border-radius: 8px; }
.landing-hero { text-align: center; padding: 88px 0 80px; }
.eyebrow { font-size: 11px; font-weight: 700; letter-spacing: .13em; color: #615d59; }
.landing-hero h1 { font-size: clamp(44px, 6.6vw, 80px); line-height: 1.1; letter-spacing: -.048em; font-weight: 700; margin: 24px 0; }
.highlight { display: inline-block; padding: 0 22px 7px; border-radius: 999px; background: #f6d5b8; }
.landing-hero p { font-size: 19px; color: #615d59; line-height: 1.65; margin: 28px auto; }
.landing-hero .btn-primario { font-size: 15px; font-weight: 500; gap: 18px; }
.landing-secondary { display: block; margin-top: 20px; color: #615d59; font-size: 14px; }
.landing-guide { scroll-margin-top: 24px; display: grid; grid-template-columns: 1fr 1fr; gap: 64px; padding: 48px; background: #e6f3fe; border-radius: 12px; }
.landing h2 { font-size: clamp(28px, 3vw, 38px); line-height: 1.18; letter-spacing: -.035em; margin: 18px 0; }
.landing-guide p { color: #4b5761; line-height: 1.65; }
.note-pill { display: inline-block; margin-top: 24px; padding: 6px 12px; border-radius: 999px; background: white; color: #3f535f; font-size: 12px; }
.landing-steps { list-style: none; display: flex; flex-direction: column; justify-content: center; gap: 12px; }
.landing-steps li { display: flex; align-items: flex-start; gap: 16px; padding: 20px; border: 1px solid #dce5eb; background: white; border-radius: 12px; }
.step-number { display: grid; place-items: center; flex-shrink: 0; width: 28px; height: 28px; background: #f6f5f4; border-radius: 50%; font: 18px Georgia, serif; }
.landing-steps h3 { font-size: 16px; margin-bottom: 4px; }
.landing-steps p { font-size: 14px; }
.landing-teachers { padding: 80px 0; }
.feature-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 20px; margin-top: 36px; }
.feature-grid article { padding: 28px; background: white; border: 1px solid #e6e4e1; border-radius: 12px; }
.feature-grid article:nth-child(2) { background: #ffedb7; border-color: #ffedb7; }
.feature-grid article:nth-child(3) { background: #f6d5b8; border-color: #f6d5b8; }
.feature-label { font-size: 11px; letter-spacing: .1em; font-weight: 600; }
.feature-grid h3 { font-size: 22px; line-height: 1.25; letter-spacing: -.03em; margin: 38px 0 16px; }
.feature-grid p { font-size: 15px; line-height: 1.65; color: #514c46; }
.landing-footer { padding: 28px 0; border-top: 1px solid #dedbd6; display: flex; align-items: center; justify-content: space-between; gap: 20px; font-size: 13px; color: #615d59; }
.landing-footer a { color: #615d59; text-decoration: underline; }
@media (max-width: 760px) {
 .landing { padding: 0 20px; }
 .landing-nav { min-height: 76px; }
 .landing-login { font-size: 12px; padding: 8px; }
 .landing-hero { padding: 56px 0; }
 .landing-hero p { font-size: 16px; }
 .landing-guide { grid-template-columns: 1fr; gap: 28px; padding: 28px 20px; }
 .feature-grid { grid-template-columns: 1fr; }
 .landing-teachers { padding: 56px 0; }
 .landing-footer { flex-wrap: wrap; }
 .quiz-nav { flex-wrap: wrap; }
}