/* Phone-only layout. Desktop styling remains with the existing stylesheets. */
.mobile-nav-toggle { display: none; }
@media (max-width: 620px) {
  body.playful-site.academic-site { font-size: 16px; }
  body.playful-site.academic-site.home-page { font-size: 15px; }
  body.playful-site.academic-site :is(.site-header, .simple-header, .algebra-header, .club-header, .course-header) {
    padding-inline: 18px; gap: 10px;
  }
  body.playful-site.academic-site :is(.site-header, .algebra-header) { height: 88px; }
  body.playful-site.academic-site .simple-header { min-height: 88px; padding-block: 8px; }
  body.playful-site.academic-site :is(.site-header, .simple-header, .algebra-header, .club-header, .course-header) .brand-logo {
    height: 72px; width: auto; max-height: 72px;
  }
  body.playful-site.academic-site .simple-header > .button { padding: 10px 12px; font-size: 14px; min-height: 44px; }
  body.playful-site.academic-site .mobile-nav-toggle {
    display: grid; place-content: center; gap: 5px; flex: 0 0 44px;
    width: 44px; height: 44px; padding: 10px; border: 1px solid #dce5ef;
    border-radius: 6px; background: transparent; color: #182f4d; cursor: pointer;
  }
  .mobile-nav-toggle span { display: block; width: 21px; height: 2px; background: currentColor; }
  body.playful-site.academic-site .simple-header.has-mobile-nav > nav { display: none; }
  body.playful-site.academic-site .simple-header.has-mobile-nav > nav.mobile-nav-open {
    display: grid; grid-template-columns: 1fr; order: 5; width: 100%;
    gap: 0; padding: 8px 0; max-height: 60dvh; overflow-y: auto;
    overscroll-behavior-y: contain; text-align: left;
  }
  body.playful-site.academic-site .simple-header.has-mobile-nav > nav a {
    display: flex; align-items: center; min-height: 44px; padding: 10px 12px;
    font-size: 16px; white-space: normal; border-radius: 4px;
  }
  body.playful-site.academic-site :is(.hero, .page-hero, .content-hero, .competition-hero, .science-hero, .school-hero) {
    padding: 36px 20px; gap: 28px;
  }
  body.playful-site.academic-site :is(.hero .home-hero-title, .page-hero h1, .content-hero h1, .competition-hero h1, .science-hero h1, .school-hero h1) {
    font-size: clamp(28px, 8vw, 34px); line-height: 1.2; margin-block: 14px 20px;
  }
  body.playful-site.academic-site.home-page .hero .home-hero-title {
    font-size: clamp(28px, 7.8vw, 32px); line-height: 1.15; margin: 12px 0 16px;
  }
  body.playful-site.academic-site :is(.hero-lead, .hero-description, .page-hero > p:not(.kicker), .content-hero > p:not(.kicker)) {
    font-size: 16px; line-height: 1.7;
  }
  body.playful-site.academic-site.home-page .hero-lead { font-size: 15px; line-height: 1.65; }
  body.playful-site.academic-site :is(.page-hero, .content-hero, .competition-hero, .science-hero, .school-hero) > .kicker {
    font-size: 13px; line-height: 1.6; letter-spacing: .08em; margin-top: 0;
  }
  body.playful-site.academic-site :is(.section, .page-wrap, .content-wrap, .competition-section, .trial) { padding: 40px 20px; }
  body.playful-site.academic-site :is(.page-intro, .section-heading) { gap: 16px; margin-bottom: 26px; }
  body.playful-site.academic-site .page-intro > p { margin: 0; }
  body.playful-site.academic-site :is(.page-intro h2, .section-heading h2, .home-pathways .section-heading h2, .program-copy h2, .contest-heading h2) {
    font-size: clamp(25px, 7vw, 30px); line-height: 1.25;
  }
  body.playful-site.academic-site.home-page :is(.v2-heading h2, .section-heading h2, .home-pathways .section-heading h2) {
    font-size: clamp(24px, 6.6vw, 28px); line-height: 1.22;
  }
  body.playful-site.academic-site :is(.program-card, .home-pathways .program-card, .info-card, .course-card, .contest-card, .stage-grid article, .pathway-cards > a, .content-grid article, .trial-form, .inquiry-form) {
    padding: 22px; min-width: 0;
  }
  body.playful-site.academic-site .home-pathways .program-card h3 { min-height: 0; font-size: 24px; }
  body.playful-site.academic-site.home-page :is(.home-pathways .program-card h3, .v2-program-grid h3) { font-size: 22px; }
  body.playful-site.academic-site.home-page :is(.v2-program-grid p, .section-heading > p, .system-summary p) { font-size: 15px; }
  body.playful-site.academic-site.home-page .hero-actions .button { font-size: 15px; }
  body.playful-site.academic-site :is(.program-grid, .info-grid, .content-grid, .pathway-cards, .stage-grid) { gap: 20px; }
  body.playful-site.academic-site :is(.hero-actions, .a-actions) { gap: 12px; }
  body.playful-site.academic-site .hero-actions > a { width: 100%; text-align: center; justify-content: center; }
  body.playful-site.academic-site :is(.subject-jump, .competition-jump) { gap: 8px; }
  body.playful-site.academic-site :is(.subject-jump, .competition-jump) a { min-height: 44px; display: inline-flex; align-items: center; padding: 8px 12px; }
  body.playful-site.academic-site .inquiry-form { margin-top: 28px; }
  body.playful-site.academic-site .inquiry-form a { overflow-wrap: anywhere; }
  body.playful-site.academic-site .course-group .course-card { padding: 0; grid-template-columns: minmax(0, 1fr); }
  body.playful-site.academic-site .course-group .course-copy { padding: 22px 20px 12px; min-width: 0; }
  body.playful-site.academic-site .course-group .course-card h4 { overflow-wrap: break-word; }
  body.playful-site.academic-site .course-group .course-fee { padding: 0 20px 18px; text-align: left; }
  body.playful-site.academic-site :is(input:not([type=checkbox]):not([type=radio]):not([type=hidden]), select) { min-height: 44px; }
  body.playful-site.academic-site .site-header ~ main[id],
  body.playful-site.academic-site .site-header ~ main [id] { scroll-margin-top: 104px; }
  body.playful-site.academic-site .footer-main { gap: 28px; }
  body.playful-site.academic-site .site-footer { padding: 36px 20px 24px; }

  /* Homepage phone composition: compact header, calmer hero, and lighter content rhythm. */
  body.playful-site.academic-site.home-page .announcement {
    height: 32px; min-height: 32px; padding-inline: 14px; font-size: 12px;
  }
  body.playful-site.academic-site.home-page .site-header {
    height: 70px; padding-inline: 16px; gap: 12px;
  }
  body.playful-site.academic-site.home-page .site-header picture .brand-logo {
    width: 124px; height: auto; max-height: 52px;
  }
  body.playful-site.academic-site.home-page .menu-toggle {
    width: 42px; min-width: 42px; height: 42px; min-height: 42px; padding: 8px;
  }
  body.playful-site.academic-site.home-page .hero {
    padding: 32px 18px 38px; gap: 0;
  }
  body.playful-site.academic-site.home-page .hero .eyebrow {
    font-size: 11px; line-height: 1.5; letter-spacing: .07em;
  }
  body.playful-site.academic-site.home-page .hero .home-hero-title::after {
    width: 44px; height: 3px; margin-top: 16px;
  }
  body.playful-site.academic-site.home-page .hero .home-hero-title {
    max-width: 350px; font-size: 28px; line-height: 1.14;
  }
  body.playful-site.academic-site.home-page .home-hero-title .hero-title-phrase {
    display: inline; white-space: normal;
  }
  body.playful-site.academic-site.home-page .hero-actions {
    align-items: center; margin-top: 22px;
  }
  body.playful-site.academic-site.home-page .hero-actions .button {
    min-height: 46px; padding: 12px 16px;
  }
  body.playful-site.academic-site.home-page .hero-actions .button span { margin-left: 6px; }
  body.playful-site.academic-site.home-page .hero-actions .text-link {
    width: auto; padding-block: 6px; font-size: 14px;
  }
  body.playful-site.academic-site.home-page .hero-problem {
    display: none;
  }
  body.playful-site.academic-site.home-page .problem-card {
    padding: 18px; border-top-width: 2px;
  }
  body.playful-site.academic-site.home-page .problem-top,
  body.playful-site.academic-site.home-page .problem-label,
  body.playful-site.academic-site.home-page .problem-foot { font-size: 11px; }
  body.playful-site.academic-site.home-page .problem-card h2 {
    font-size: 16px; line-height: 1.45;
  }
  body.playful-site.academic-site.home-page .answer-row {
    gap: 6px; margin: 17px 0;
  }
  body.playful-site.academic-site.home-page .answer-row span {
    padding-block: 8px; font-size: 13px;
  }
  body.playful-site.academic-site.home-page :is(.v2-programs, .v2-system, .section) {
    padding: 44px 18px;
  }
  body.playful-site.academic-site.home-page .v2-heading { margin-bottom: 24px; }
  body.playful-site.academic-site.home-page .v2-program-grid { gap: 14px; }
  body.playful-site.academic-site.home-page .v2-program-grid > a {
    display: grid; grid-template-columns: 28px minmax(0, 1fr); column-gap: 12px;
    padding: 17px 18px; border-top-width: 3px;
  }
  body.playful-site.academic-site.home-page .v2-program-grid > a > span {
    grid-row: 1 / 4; align-self: start; padding-top: 2px;
  }
  body.playful-site.academic-site.home-page .v2-program-grid h3 {
    margin: 0 0 9px; padding-bottom: 10px; font-size: 20px;
  }
  body.playful-site.academic-site.home-page .v2-program-grid p {
    min-height: 0; margin: 0 0 10px; font-size: 14px; line-height: 1.55;
  }
  body.playful-site.academic-site.home-page .v2-program-grid b { font-size: 13px; }
  body.playful-site.academic-site.home-page .v2-programs > p {
    margin: 20px 0 0; font-size: 14px; line-height: 1.5;
  }
  body.playful-site.academic-site.home-page :is(.home-pathways .program-card, .story-grid blockquote) {
    padding: 18px;
  }
  body.playful-site.academic-site.home-page .home-pathways .pathway-actions {
    min-height: 0; margin-top: 16px;
  }
  body.playful-site.academic-site.home-page .home-pathways .program-card > p:not(.grade) {
    margin-bottom: 12px; line-height: 1.55;
  }
  body.playful-site.academic-site.home-page .home-pathways .program-card h3 {
    margin-block: 12px 10px; padding-bottom: 12px;
  }
  body.playful-site.academic-site.home-page .pathway-details summary {
    min-height: 42px; padding-block: 10px; font-size: 14px;
  }
  body.playful-site.academic-site.home-page .pathway-primary {
    min-height: 44px; padding: 10px 14px; font-size: 14px;
  }
  body.playful-site.academic-site.home-page .v2-five {
    grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-bottom: 20px;
  }
  body.playful-site.academic-site.home-page .v2-five > article {
    padding: 15px; border: 1px solid #d6e1ed;
  }
  body.playful-site.academic-site.home-page .v2-five > article:last-child {
    grid-column: 1 / -1;
  }
  body.playful-site.academic-site.home-page .v2-five h3 {
    margin: 10px 0 4px; font-size: 17px;
  }
  body.playful-site.academic-site.home-page .v2-five :is(strong, p) {
    font-size: 12px; line-height: 1.5;
  }
  body.playful-site.academic-site.home-page .method-copy {
    padding: 32px 20px;
  }
  body.playful-site.academic-site.home-page .method-list {
    gap: 16px; margin-top: 24px;
  }
  body.playful-site.academic-site.home-page .method-list > div { padding-top: 12px; }
  body.playful-site.academic-site.home-page .story-grid {
    grid-template-columns: none; grid-auto-flow: column;
    grid-auto-columns: minmax(276px, 84vw); gap: 12px;
    margin-inline: -18px; padding: 2px 18px 16px;
    overflow-x: auto; overscroll-behavior-inline: contain;
    scroll-snap-type: inline mandatory; scrollbar-width: none;
  }
  body.playful-site.academic-site.home-page .story-grid::-webkit-scrollbar { display: none; }
  body.playful-site.academic-site.home-page .story-grid > blockquote { scroll-snap-align: start; }
  body.playful-site.academic-site.home-page .stories { overflow: hidden; }
  body.playful-site.academic-site.home-page .stories .section-heading { margin-bottom: 18px; }
  body.playful-site.academic-site.home-page .stories .section-heading > p { font-size: 14px; }
  body.playful-site.academic-site.home-page .footer-main { gap: 22px; }
  body.playful-site.academic-site.home-page .footer-main > div { gap: 7px; }
  body.playful-site.academic-site.home-page .stats strong { font-size: 17px; }
  body.playful-site.academic-site.home-page .stats span { font-size: 12px; line-height: 1.35; }
  body.playful-site.academic-site.home-page .story-grid blockquote p { font-size: 15px; line-height: 1.65; }
  body.playful-site.academic-site.home-page .site-header ~ main[id],
  body.playful-site.academic-site.home-page .site-header ~ main [id] { scroll-margin-top: 84px; }
  body.playful-site.academic-site.home-page .site-footer { padding: 32px 18px 22px; }

  /* Reduced homepage type scale for compact phone screens; touch targets stay unchanged. */
  body.playful-site.academic-site.home-page { font-size: 14px; }
  body.playful-site.academic-site.home-page .announcement { font-size: 11px; }
  body.playful-site.academic-site.home-page .hero .eyebrow { font-size: 10px; }
  body.playful-site.academic-site.home-page .hero .home-hero-title {
    max-width: 330px; font-size: 26px; line-height: 1.16;
  }
  body.playful-site.academic-site.home-page .hero-lead { font-size: 14px; line-height: 1.62; }
  body.playful-site.academic-site.home-page :is(.v2-heading h2, .section-heading h2, .home-pathways .section-heading h2, .method h2) {
    font-size: 23px; line-height: 1.2;
  }
  body.playful-site.academic-site.home-page :is(.hero-actions .button, .hero-actions .text-link, .pathway-primary) {
    font-size: 13px;
  }
  body.playful-site.academic-site.home-page .v2-program-grid h3 { font-size: 18px; }
  body.playful-site.academic-site.home-page .home-pathways .program-card h3 { font-size: 20px; }
  body.playful-site.academic-site.home-page :is(.v2-program-grid p, .section-heading > p, .home-pathways .program-card > p:not(.grade), .method-copy > p, .story-grid blockquote p, .system-summary p) {
    font-size: 14px;
  }
  body.playful-site.academic-site.home-page :is(.grade, .pathway-details summary, .home-pathways .program-card li, .v2-programs > p) {
    font-size: 13px;
  }
  body.playful-site.academic-site.home-page .story-grid blockquote h3 { font-size: 16px; }
  body.playful-site.academic-site.home-page :is(.footer-main, .footer-bottom) { font-size: 13px; }

  /* Final compact scale: typography and spacing reduce together. */
  body.playful-site.academic-site.home-page { font-size: 13px; }
  body.playful-site.academic-site.home-page .announcement {
    height: 30px; min-height: 30px; font-size: 10.5px;
  }
  body.playful-site.academic-site.home-page .site-header {
    height: 66px; padding-inline: 15px;
  }
  body.playful-site.academic-site.home-page .site-header picture .brand-logo {
    width: 118px; max-height: 48px;
  }
  body.playful-site.academic-site.home-page .hero {
    padding: 27px 16px 32px;
  }
  body.playful-site.academic-site.home-page .hero .eyebrow { font-size: 9.5px; }
  body.playful-site.academic-site.home-page .hero .home-hero-title {
    max-width: 340px; margin-block: 10px 14px; font-size: 24px; line-height: 1.16;
  }
  body.playful-site.academic-site.home-page .hero .home-hero-title::after {
    width: 40px; margin-top: 13px;
  }
  body.playful-site.academic-site.home-page .hero-lead { font-size: 13px; line-height: 1.6; }
  body.playful-site.academic-site.home-page .hero-actions { margin-top: 18px; gap: 9px; }
  body.playful-site.academic-site.home-page :is(.hero-actions .button, .hero-actions .text-link, .pathway-primary) {
    font-size: 12px;
  }
  body.playful-site.academic-site.home-page :is(.v2-programs, .v2-system, .section) {
    padding: 38px 16px;
  }
  body.playful-site.academic-site.home-page :is(.v2-heading h2, .section-heading h2, .home-pathways .section-heading h2, .method h2) {
    font-size: 21px; line-height: 1.2;
  }
  body.playful-site.academic-site.home-page :is(.v2-heading, .section-heading) {
    margin-bottom: 20px;
  }
  body.playful-site.academic-site.home-page .v2-program-grid { gap: 11px; }
  body.playful-site.academic-site.home-page .v2-program-grid > a {
    grid-template-columns: 25px minmax(0, 1fr); column-gap: 10px; padding: 15px 16px;
  }
  body.playful-site.academic-site.home-page .v2-program-grid h3 { font-size: 17px; }
  body.playful-site.academic-site.home-page :is(.v2-programs > p, .v2-system) .text-link { font-size: 13px; }
  body.playful-site.academic-site.home-page .home-pathways .program-card h3 { font-size: 18px; }
  body.playful-site.academic-site.home-page :is(.v2-program-grid p, .section-heading > p, .home-pathways .program-card > p:not(.grade), .method-copy > p, .story-grid blockquote p, .system-summary p) {
    font-size: 13px; line-height: 1.55;
  }
  body.playful-site.academic-site.home-page :is(.grade, .pathway-details summary, .home-pathways .program-card li, .v2-programs > p, .v2-program-grid b) {
    font-size: 12px;
  }
  body.playful-site.academic-site.home-page :is(.home-pathways .program-card, .story-grid blockquote) {
    padding: 16px;
  }
  body.playful-site.academic-site.home-page .home-pathways .pathway-actions { margin-top: 12px; }
  body.playful-site.academic-site.home-page .v2-five { gap: 8px; }
  body.playful-site.academic-site.home-page .v2-five > article { padding: 13px; }
  body.playful-site.academic-site.home-page .v2-five h3 { font-size: 15px; }
  body.playful-site.academic-site.home-page .v2-five :is(strong, p) { font-size: 11.5px; }
  body.playful-site.academic-site.home-page .method-copy { padding: 28px 18px; }
  body.playful-site.academic-site.home-page .story-grid {
    grid-auto-columns: minmax(264px, 82vw); margin-inline: -16px; padding-inline: 16px;
  }
  body.playful-site.academic-site.home-page .story-grid blockquote h3 { font-size: 15px; }
  body.playful-site.academic-site.home-page :is(.footer-main, .footer-bottom) { font-size: 12px; }
  body.playful-site.academic-site.home-page .site-footer { padding: 28px 16px 20px; }

  /* Extra-small homepage type scale requested for phones. */
  body.playful-site.academic-site.home-page { font-size: 12.5px; }
  body.playful-site.academic-site.home-page .announcement { font-size: 10px; }
  body.playful-site.academic-site.home-page .site-header .main-nav a { font-size: 13px; }
  body.playful-site.academic-site.home-page .hero .eyebrow { font-size: 9px; }
  body.playful-site.academic-site.home-page .hero .home-hero-title {
    max-width: 320px; font-size: 22px; line-height: 1.17;
  }
  body.playful-site.academic-site.home-page .hero-lead { font-size: 12px; line-height: 1.58; }
  body.playful-site.academic-site.home-page :is(.v2-heading h2, .section-heading h2, .home-pathways .section-heading h2, .method h2) {
    font-size: 20px;
  }
  body.playful-site.academic-site.home-page .v2-program-grid h3 { font-size: 16px; }
  body.playful-site.academic-site.home-page .home-pathways .program-card h3 { font-size: 17px; }
  body.playful-site.academic-site.home-page :is(.v2-program-grid p, .section-heading > p, .home-pathways .program-card > p:not(.grade), .method-copy > p, .story-grid blockquote p, .system-summary p) {
    font-size: 12px;
  }
  body.playful-site.academic-site.home-page :is(.grade, .pathway-details summary, .home-pathways .program-card li, .v2-programs > p, .v2-program-grid b) {
    font-size: 11px;
  }
  body.playful-site.academic-site.home-page :is(.hero-actions .button, .hero-actions .text-link, .pathway-primary) {
    font-size: 11.5px;
  }
  body.playful-site.academic-site.home-page :is(.v2-programs > p, .v2-system) .text-link { font-size: 12px; }
  body.playful-site.academic-site.home-page .v2-five h3 { font-size: 14px; }
  body.playful-site.academic-site.home-page .v2-five :is(strong, p) { font-size: 10.5px; }
  body.playful-site.academic-site.home-page .story-grid blockquote h3 { font-size: 14px; }
  body.playful-site.academic-site.home-page :is(.footer-main, .footer-bottom) { font-size: 11px; }
}

/* Tablet layout: bridge the gap between phone and desktop rules on iPad-sized screens. */
@media (min-width: 621px) and (max-width: 1100px),
  (min-width: 1101px) and (max-width: 1366px) and (hover: none) and (pointer: coarse) {
  html {
    font-size: 12px;
  }
  body.playful-site.academic-site {
    font-size: 9px;
  }
  body.playful-site.academic-site .announcement {
    min-height: 28px;
    padding-inline: 18px;
    font-size: 9px;
  }
  body.playful-site.academic-site
    :is(.site-header, .simple-header, .algebra-header, .club-header, .course-header) {
    min-height: 62px;
    height: 62px;
    padding: 4px 16px;
    gap: 10px;
  }
  body.playful-site.academic-site
    :is(.site-header, .simple-header, .algebra-header, .club-header, .course-header) .brand-logo {
    width: auto;
    height: 48px;
    max-height: 48px;
  }
  body.playful-site.academic-site .site-header .menu-toggle,
  body.playful-site.academic-site .mobile-nav-toggle {
    width: 38px;
    min-width: 38px;
    height: 38px;
    min-height: 38px;
    padding: 7px;
  }
  body.playful-site.academic-site .mobile-nav-toggle {
    display: grid;
    place-content: center;
    gap: 5px;
    margin-left: auto;
    border: 1px solid #dce5ef;
    border-radius: 6px;
    background: transparent;
    color: #182f4d;
  }
  body.playful-site.academic-site .simple-header.has-mobile-nav > .button {
    margin-left: auto;
  }
  body.playful-site.academic-site .simple-header.has-mobile-nav:has(> .button) > .mobile-nav-toggle {
    margin-left: 0;
  }
  body.playful-site.academic-site .mobile-nav-toggle span {
    display: block;
    width: 21px;
    height: 2px;
    background: currentColor;
  }
  body.playful-site.academic-site .simple-header.has-mobile-nav > nav {
    display: none;
  }
  body.playful-site.academic-site .simple-header.has-mobile-nav > nav.mobile-nav-open {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    z-index: 20;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0;
    max-height: 65dvh;
    padding: 9px 20px 14px;
    overflow-y: auto;
    background: #f8fafc;
    border-bottom: 1px solid #c8d3dc;
    box-shadow: 0 14px 24px #1b344912;
  }
  body.playful-site.academic-site .simple-header.has-mobile-nav > nav.mobile-nav-open a {
    display: flex;
    align-items: center;
    min-height: 44px;
    padding: 9px 12px;
    white-space: normal;
    font-size: 10.5px;
  }
  body.playful-site.academic-site
    :is(.section, .page-wrap, .content-wrap, .competition-section, .trial, .v2-programs, .v2-system) {
    padding: 38px 16px;
  }
  body.playful-site.academic-site
    :is(.page-hero, .content-hero, .competition-hero, .science-hero, .school-hero) {
    padding: 26px 16px;
  }
  body.playful-site.academic-site
    :is(.page-hero h1, .content-hero h1, .competition-hero h1, .science-hero h1, .school-hero h1, .algebra-hero h1, .course-hero h1, .club-hero h1) {
    font-size: clamp(18px, 2.7vw, 24px);
    line-height: 1.15;
  }
  body.playful-site.academic-site.home-page .hero {
    padding: 24px 16px 28px;
    gap: 18px;
  }
  body.playful-site.academic-site.home-page .hero .home-hero-title {
    max-width: 520px;
    margin-block: 11px 14px;
    font-size: clamp(18px, 2.45vw, 22px);
    line-height: 1.13;
  }
  body.playful-site.academic-site.home-page .hero-lead {
    font-size: 10.5px;
    line-height: 1.6;
  }
  body.playful-site.academic-site.home-page .hero-problem {
    width: min(490px, 100%);
    max-width: none;
    margin-top: 0;
  }
  body.playful-site.academic-site.home-page .problem-card {
    padding: 13px;
  }
  body.playful-site.academic-site.home-page .answer-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  body.playful-site.academic-site.home-page .home-pathways .program-card {
    padding: 13px;
  }
  body.playful-site.academic-site.home-page .home-pathways .grade {
    flex-direction: column;
    align-items: flex-start;
    min-height: 36px;
    gap: 4px;
    font-size: 9px;
  }
  body.playful-site.academic-site.home-page .home-pathways .grade span {
    padding-left: 0;
    border-left: 0;
    font-size: 9px;
  }
  body.playful-site.academic-site.home-page .home-pathways .program-card h3 {
    height: 50px;
    min-height: 50px;
    max-height: 50px;
    font-size: 12px;
  }
  body.playful-site.academic-site.home-page .home-pathways .program-card > p:not(.grade) {
    height: 60px;
    min-height: 60px;
    max-height: 60px;
    font-size: 9px;
  }
  body.playful-site.academic-site.home-page .pathway-card-top {
    margin-bottom: 13px;
  }
  body.playful-site.academic-site.home-page .pathway-symbol {
    width: 31px;
    height: 31px;
  }
  body.playful-site.academic-site.home-page .pathway-actions {
    display: grid;
    grid-template-rows: 38px minmax(0, 1fr);
    align-content: start;
    height: 86px;
    min-height: 86px;
    max-height: 86px;
    gap: 7px;
  }
  body.playful-site.academic-site.home-page .pathway-primary {
    padding: 7px 10px;
    font-size: 10.5px;
    white-space: nowrap;
  }
  body.playful-site.academic-site.home-page .pathway-secondary {
    align-self: start;
    min-height: 18px;
    white-space: nowrap;
  }
  body.playful-site.academic-site.home-page .story-grid blockquote {
    padding: 12px;
  }
  body.playful-site.academic-site main h2 {
    font-size: clamp(15px, 2.1vw, 18px);
  }
  body.playful-site.academic-site main h3 {
    font-size: 12px;
  }
  body.playful-site.academic-site main
    :is(p, li):not(.kicker):not(.eyebrow):not(.club-kicker):not(.contest-tag):not(.grade):not(.study-label) {
    font-size: 9px;
  }
  body.playful-site.academic-site
    :is(.button, .text-link, .text-action, .pathway-primary, .pathway-secondary) {
    font-size: 9px;
  }
  body.playful-site.academic-site
    :is(.kicker, .eyebrow, .contest-tag, .problem-top, .problem-label, .problem-foot, .problem-note) {
    font-size: 8.5px;
  }
  body.playful-site.academic-site
    :is(.simple-footer, .footer-main, .footer-bottom) {
    font-size: 9px;
  }
  body.playful-site.academic-site
    :is(.program-card, .info-card, .course-card, .contest-card, .stage-grid article, .pathway-cards > a, .content-grid article, .system-panel, .trial-form, .inquiry-form) {
    padding: 16px;
  }
  body.playful-site.academic-site .club-hero {
    width: calc(100% - 64px);
    padding-block: 38px;
    gap: 28px;
  }
  body.playful-site.academic-site.home-page .footer-main {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, .9fr) minmax(0, 1.6fr);
    gap: 32px;
  }
  body.playful-site.academic-site.home-page .footer-main a[href="algebra.html"] {
    white-space: nowrap;
  }
  body.playful-site.academic-site .program-overview > p {
    margin: 14px 0 0;
  }
  body.playful-site.academic-site .program-overview > p .text-action {
    display: block;
    width: 100%;
    min-height: 48px;
    padding: 12px 14px;
    border: 1px solid #bccbd5;
    border-left: 3px solid #405d72;
    background: #f5f8fc;
    color: #305f86;
    line-height: 1.45;
    text-decoration: none;
  }
  body.playful-site.academic-site
    :is(input:not([type=checkbox]):not([type=radio]):not([type=hidden]), select, textarea) {
    font-size: 16px;
  }
}

@media (min-width: 900px) and (max-width: 1100px),
  (min-width: 1101px) and (max-width: 1366px) and (hover: none) and (pointer: coarse) {
  body.playful-site.academic-site.home-page .hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(285px, .82fr);
    align-items: center;
  }
  body.playful-site.academic-site.home-page .home-pathways .program-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 621px) and (max-width: 900px) {
  body.playful-site.academic-site.algebra-page .algebra-menu {
    display: flex;
    align-items: center;
    gap: 8px;
    min-height: 40px;
    padding: 7px 10px;
    margin-left: auto;
    border: 1px solid #c7c8bd;
    background: transparent;
    color: #182f4d;
    font-size: 11px;
  }
  body.playful-site.academic-site.algebra-page .algebra-header > nav {
    display: none;
  }
  body.playful-site.academic-site.algebra-page .algebra-header > nav.is-open {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    z-index: 20;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px 22px 16px;
    background: #f8f7f3;
    border-bottom: 1px solid #d9d6cc;
    box-shadow: 0 12px 24px #1b344911;
  }
  body.playful-site.academic-site.algebra-page .algebra-header > nav.is-open a {
    min-height: 42px;
    padding: 10px 0;
    font-size: 11px;
  }
}

@media (min-width: 621px) and (max-width: 899px) {
  body.playful-site.academic-site.home-page .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }
  body.playful-site.academic-site.home-page .hero-problem {
    display: block;
    width: min(560px, 100%);
    justify-self: center;
  }
  body.playful-site.academic-site.home-page .problem-card {
    padding: 18px;
  }
  body.playful-site.academic-site.home-page .answer-row {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
  }
  body.playful-site.academic-site.home-page .problem-note {
    right: 0;
  }
}

/* Fluid phone sizing: interpolate spacing across small and large phones. */
@media (max-width: 620px) {
  body.playful-site.academic-site {
    --phone-gutter: clamp(14px, 4.4vw, 20px);
    --phone-section-space: clamp(34px, 9vw, 44px);
  }
  body.playful-site.academic-site
    :is(.site-header, .simple-header, .algebra-header, .club-header, .course-header) {
    padding-right: var(--phone-gutter);
    padding-left: var(--phone-gutter);
  }
  body.playful-site.academic-site
    :is(.hero, .page-hero, .content-hero, .competition-hero, .science-hero, .school-hero) {
    padding-right: var(--phone-gutter);
    padding-left: var(--phone-gutter);
  }
  body.playful-site.academic-site
    :is(.section, .page-wrap, .content-wrap, .competition-section, .trial, .v2-programs, .v2-system) {
    padding-right: var(--phone-gutter);
    padding-left: var(--phone-gutter);
  }
  body.playful-site.academic-site.home-page :is(.v2-programs, .v2-system, .section) {
    padding-top: var(--phone-section-space);
    padding-bottom: var(--phone-section-space);
  }
  body.playful-site.academic-site
    :is(.program-card, .home-pathways .program-card, .info-card, .course-card, .contest-card, .stage-grid article, .pathway-cards > a, .content-grid article, .trial-form, .inquiry-form) {
    padding-right: clamp(16px, 4.8vw, 22px);
    padding-left: clamp(16px, 4.8vw, 22px);
  }
  body.playful-site.academic-site.home-page .hero {
    padding-top: clamp(26px, 7.5vw, 34px);
    padding-bottom: clamp(30px, 8.5vw, 40px);
  }
  body.playful-site.academic-site.home-page .hero-actions > a,
  body.playful-site.academic-site .inquiry-form :is(button, .button) {
    max-width: 100%;
  }
  body.playful-site.academic-site :is(img, svg, video, canvas) {
    max-width: 100%;
  }
  body.playful-site.academic-site:not(.home-page) {
    font-size: 13px;
  }
  body.playful-site.academic-site:not(.home-page)
    :is(.hero .home-hero-title, .page-hero h1, .content-hero h1, .competition-hero h1, .science-hero h1, .school-hero h1, .algebra-hero h1, .course-hero h1, .club-hero h1) {
    font-size: clamp(21px, 6.8vw, 24px);
  }
  body.playful-site.academic-site.algebra-course-page .course-hero h1,
  body.playful-site.academic-site .club-hero h1 {
    font-size: clamp(21px, 6.8vw, 24px);
  }
  body.playful-site.academic-site:not(.home-page) main h2 {
    font-size: clamp(18px, 5.5vw, 20px);
  }
  body.playful-site.academic-site:not(.home-page) main h3 {
    font-size: 15px;
  }
  body.playful-site.academic-site:not(.home-page)
    :is(p, li):not(.kicker):not(.eyebrow):not(.club-kicker):not(.contest-tag):not(.grade):not(.study-label) {
    font-size: 12px;
  }
  body.playful-site.academic-site.home-page .hero .home-hero-title {
    font-size: clamp(19px, 5.8vw, 22px);
  }
  body.playful-site.academic-site.home-page
    :is(.v2-heading h2, .section-heading h2, .home-pathways .section-heading h2, .method h2) {
    font-size: clamp(17px, 5.2vw, 19px);
  }
  body.playful-site.academic-site.home-page
    :is(.v2-program-grid h3, .home-pathways .program-card h3) {
    font-size: clamp(14px, 4.5vw, 16px);
  }
  body.playful-site.academic-site.home-page .hero-lead {
    font-size: 11.5px;
  }
  body.playful-site.academic-site.home-page
    :is(.v2-program-grid p, .section-heading > p, .home-pathways .program-card > p:not(.grade), .method-copy > p, .story-grid blockquote p, .system-summary p) {
    font-size: 11.5px;
  }
  body.playful-site.academic-site.home-page
    :is(.grade, .pathway-details summary, .home-pathways .program-card li, .v2-programs > p, .v2-program-grid b) {
    font-size: 10.5px;
  }
  body.playful-site.academic-site
    :is(input:not([type=checkbox]):not([type=radio]):not([type=hidden]), select, textarea) {
    font-size: 16px;
  }
}

/* Compact phone landscape without affecting portrait typography. */
@media (min-width: 480px) and (max-width: 759px) and (max-height: 500px) and (orientation: landscape) {
  body.playful-site.academic-site
    :is(.site-header, .simple-header, .algebra-header, .club-header, .course-header) {
    min-height: 68px;
    height: 68px;
  }
  body.playful-site.academic-site
    :is(.site-header, .simple-header, .algebra-header, .club-header, .course-header) .brand-logo {
    height: 52px;
    max-height: 52px;
  }
  body.playful-site.academic-site.home-page .announcement {
    min-height: 28px;
    height: 28px;
  }
  body.playful-site.academic-site.home-page .hero {
    padding-top: 24px;
    padding-bottom: 28px;
  }
}