.practice-landing { max-width: 1120px; padding-top: 25px; padding-bottom: 52px; }
.practice-landing .breadcrumbs { flex-wrap: wrap; margin-bottom: 34px; font-size: .82rem; }
.practice-landing .eyebrow { font-size: .7rem; letter-spacing: .1em; }
.practice-landing h1 { margin: 13px 0 21px; font-size: clamp(2.5rem, 4.5vw, 3.6rem); line-height: 1.06; letter-spacing: -.045em; }
.practice-landing h1 > span { display: block; margin-top: 12px; color: #1859b8; font-size: .52em; letter-spacing: -.025em; }
.practice-landing h2 { margin: 0; color: #172b45; font-size: clamp(1.4rem, 2.6vw, 1.8rem); line-height: 1.25; letter-spacing: -.025em; }
.practice-landing h3 { margin: 0 0 9px; color: #172b45; font-size: 1.04rem; line-height: 1.4; }
.practice-landing p { color: #4c607b; }
.practice-landing .eyebrow { color: #1762c3; }
.practice-landing .button-link { gap: 28px; min-height: 48px; padding-inline: 24px; }
.practice-landing a:focus-visible { outline: 3px solid #1762c3; outline-offset: 5px; }
.practice-hero { display: grid; grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr); align-items: center; gap: clamp(28px, 4vw, 52px); padding: 9px 0 43px; }
.practice-summary { max-width: 45ch; margin-bottom: 20px; font-size: 1.04rem; line-height: 1.65; }
.practice-counts { display: flex; flex-wrap: wrap; gap: 3px 15px; margin-bottom: 21px; font-size: .84rem; }
.practice-counts strong { color: #263c55; }
.practice-access { margin: 13px 0 0; font-size: .77rem; }
.practice-preview { min-width: 0; margin: 0; padding: 9px; border: 1px solid #d9e4f1; border-radius: 20px; background: #fff; box-shadow: 0 18px 45px #244a7910; }
.practice-preview > a { display: block; overflow: hidden; border-radius: 12px; text-decoration: none; background: #eaf1fb; }
.practice-preview img { display: block; width: 100%; height: auto; }
.practice-preview > a > span { display: flex; align-items: center; justify-content: space-between; padding: 11px 15px; color: #1859b8; font-size: .8rem; font-weight: 750; }
.practice-preview > a:hover > span { background: #dfeafb; }
.practice-preview figcaption { padding: 10px 4px 3px; text-align: center; color: #52647b; font-size: .77rem; }
.practice-skills { padding: 30px 0 34px; border-top: 1px solid #d9e4f1; }
.practice-skills-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 30px; margin-top: 25px; }
.practice-skills-grid p, .practice-concept-grid p { margin: 0; font-size: .92rem; line-height: 1.7; }
.practice-number { display: inline-grid; place-items: center; width: 29px; height: 29px; margin-bottom: 13px; border-radius: 8px; color: #1a5fd0; background: #e6eefb; font-size: .73rem; font-weight: 800; }
.practice-example { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); align-items: center; gap: 28px; padding: 30px; border: 1px solid #d9e4f1; border-radius: 20px; background: #fff; }
.practice-example-prompt { margin: 17px 0; font-size: .96rem; line-height: 1.7; }
.practice-example-options { display: grid; gap: 9px; margin: 0 0 21px; padding: 0; list-style: none; }
.practice-example-options li { display: flex; align-items: flex-start; gap: 10px; color: #4c607b; font-size: .86rem; line-height: 1.6; }
.practice-example-options li > span { display: inline-grid; flex: 0 0 23px; place-items: center; height: 23px; border: 1px solid #d9e4f1; border-radius: 6px; background: #f5f8fc; color: #52647b; font-size: .72rem; font-weight: 750; }
.practice-example .text-link { font-size: .87rem; }
.practice-example figure { min-width: 0; margin: 0; }
.practice-example svg { display: block; width: 100%; height: auto; font-family: inherit; }
.practice-example figcaption { color: #52647b; font-size: .78rem; text-align: center; }
.practice-example-task { padding: 13px 15px; border-radius: 9px; background: #edf2f9; font-size: .9rem; }
.practice-concepts { padding: 34px 0 0; }
.practice-concept-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 34px; margin-top: 23px; }
.practice-concept-grid strong { color: #263c55; font-weight: 700; }
.practice-equation { white-space: nowrap; }
.practice-misconception { margin-top: 24px; padding: 19px 23px; border-left: 3px solid #2c8067; border-radius: 0 12px 12px 0; background: #edf5f2; }
.practice-misconception h3 { color: #285d4e; font-size: .92rem; }
.practice-misconception p { margin: 0; font-size: .89rem; }
.practice-support { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: 42px; margin-top: 32px; padding: 30px 0; border-block: 1px solid #d9e4f1; }
.practice-support p { margin: 0 0 13px; font-size: .92rem; line-height: 1.7; }
.practice-support p:last-child { margin-bottom: 0; }
.practice-support .eyebrow { margin-bottom: 8px; font-size: .7rem; }
.practice-finish { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding: 30px 0; }
.practice-finish h2 { font-size: 1.5rem; }
.practice-finish p { margin: 8px 0 0; font-size: .9rem; }
.practice-finish .button-link { flex-shrink: 0; }
.practice-related { display: flex; flex-wrap: wrap; gap: 7px 18px; padding-top: 20px; border-top: 1px solid #d9e4f1; font-size: .84rem; }
.practice-related > span { color: #63748d; }
.practice-related a { color: #1859b8; font-weight: 650; text-underline-offset: 4px; }
.practice-hub-hero { padding: 30px 0 18px; }
.practice-hub .practice-summary { max-width: 70ch; }
.practice-unit-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 25px; }
.practice-unit-links a { padding: 8px 14px; border: 1px solid #c6d4e5; border-radius: 9px; color: #1859b8; background: #fff; font-size: .9rem; font-weight: 650; text-decoration: none; }
.practice-hub .catalog { margin-top: 20px; }
.practice-hub .catalog-controls { display: block; position: static; margin-bottom: 32px; padding: 16px 18px 10px; border: 1px solid #d4dfed; border-radius: 16px; background: #f8fbff; }
.practice-hub [hidden] { display: none !important; }
.practice-hub .catalog-fields { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,.6fr); gap: 14px; }
.practice-hub .catalog-fields label { min-width: 0; }
.practice-hub .catalog-fields :is(input,select) { width: 100%; height: 46px; min-width: 0; padding: 10px 13px; border: 1px solid #b9c9dd; border-radius: 9px; color: #17253a; background: #fff; font: inherit; font-size: .95rem; }
.practice-hub .catalog-feedback { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-top: 7px; }
.practice-hub .catalog-count { margin: 0; font-size: .87rem; }
.practice-hub .catalog-clear { border: 0; padding: 6px 2px; background: none; color: #1555b7; font: inherit; font-size: .87rem; font-weight: 650; cursor: pointer; }
.practice-hub .catalog-clear:disabled { color: #66768b; cursor: default; }
.practice-hub .catalog-sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.practice-hub-unit { scroll-margin-top: 20px; margin-bottom: 42px; }
.practice-hub-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 22px; margin-top: 23px; }
.practice-hub-card { display: flex; flex-direction: column; min-width: 0; overflow: hidden; border: 1px solid #d9e4f1; border-radius: 17px; background: #fff; }
.practice-hub-image { display: block; border-bottom: 1px solid #d9e4f1; }
.practice-hub-image img { display: block; width: 100%; height: auto; }
.practice-hub-copy { display: flex; flex-direction: column; flex: 1; padding: 22px; }
.practice-hub-copy h3 { font-size: 1.12rem; }
.practice-hub-copy h3 a { text-decoration: none; }
.practice-hub-copy h3 a:hover { color: #1859b8; text-decoration: underline; }
.practice-hub-copy > p { margin: 0 0 15px; font-size: .9rem; }
.practice-hub-copy .practice-hub-counts { margin-top: auto; font-size: .8rem; }
.practice-hub-copy .button-link { align-self: flex-start; min-height: 42px; gap: 16px; padding: 9px 16px; font-size: .85rem; }
.practice-hub-copy .practice-review-label { color: #287c65; font-size: .7rem; font-weight: 750; letter-spacing: .08em; text-transform: uppercase; }
.practice-hub-help { max-width: 78ch; padding-top: 25px; border-top: 1px solid #d9e4f1; }
.practice-hub-help p { font-size: .94rem; }
.practice-hub .catalog-empty { padding: 25px; border: 1px dashed #b9c9dd; border-radius: 12px; text-align: center; }
@media (max-width: 850px) {
  .practice-hub-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .practice-hero { gap: 26px; }
  .practice-landing h1 { font-size: 2.65rem; }
  .practice-skills-grid { gap: 21px; }
  .practice-example { gap: 20px; padding: 25px; }
}
@media (max-width: 640px) {
  .practice-hub-grid { grid-template-columns: 1fr; }
  .practice-hub .catalog-fields { grid-template-columns: 1fr; }
  .practice-hub-hero { padding-top: 12px; }
  .practice-landing { padding-top: 18px; padding-bottom: 35px; }
  .practice-landing .breadcrumbs { margin-bottom: 25px; font-size: .74rem; }
  .practice-hero { grid-template-columns: 1fr; gap: 26px; padding: 0 0 29px; }
  .practice-landing h1 { font-size: clamp(2.2rem, 9.7vw, 3rem); }
  .practice-summary { font-size: 1rem; }
  .practice-hero .button-link, .practice-finish .button-link { width: 100%; justify-content: center; }
  .practice-counts { font-size: .82rem; }
  .practice-access { text-align: center; }
  .practice-preview { padding: 7px; border-radius: 16px; }
  .practice-skills { padding-block: 26px; }
  .practice-skills-grid { grid-template-columns: 1fr; gap: 22px; margin-top: 22px; }
  .practice-skills-grid article { position: relative; padding-left: 41px; }
  .practice-number { position: absolute; top: 1px; left: 0; }
  .practice-example { grid-template-columns: 1fr; gap: 15px; padding: 24px 19px; border-radius: 16px; }
  .practice-example figure { max-width: 430px; }
  .practice-concepts { padding-top: 27px; }
  .practice-concept-grid { grid-template-columns: 1fr; gap: 23px; }
  .practice-misconception { padding: 17px 18px; }
  .practice-support { grid-template-columns: 1fr; gap: 17px; margin-top: 27px; padding-block: 26px; }
  .practice-finish { flex-direction: column; align-items: flex-start; gap: 20px; padding-block: 27px; }
}