:root {
  --navy: #102a43;
  --background-blue: #19477d;
  --blue: #2457a7;
  --blue-dark: #173f7a;
  --red: #d73a49;
  --cream: #f7f4ed;
  --white: #ffffff;
  --ink: #18212b;
  --muted: #5b6673;
  --line: #dfe5eb;
  --shadow: 0 18px 50px rgba(16, 42, 67, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--cream);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
}
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(247, 244, 237, .94);
  border-bottom: 1px solid rgba(16, 42, 67, .12);
  backdrop-filter: blur(12px);
}
.nav {
  width: min(1120px, calc(100% - 40px));
  margin: auto;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--navy);
}
.brand-mark {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  color: var(--white);
  background: var(--blue);
  border-radius: 8px 8px 8px 2px;
  font-weight: 900;
}
.nav-links { display: flex; align-items: center; gap: 22px; }
.nav-links a { text-decoration: none; font-weight: 700; color: var(--navy); }
.nav-links a:hover, .nav-links a:focus-visible { color: var(--red); }
.instagram-link { display: inline-flex; align-items: center; gap: 7px; }
.instagram-icon { width: 20px; height: 20px; flex: 0 0 auto; }

.hero {
  overflow: hidden;
  color: var(--white);
  background: var(--background-blue);
}
.hero-inner {
  width: min(1120px, calc(100% - 40px));
  min-height: 610px;
  margin: auto;
  padding: 88px 0 80px;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(300px, .75fr);
  align-items: center;
  gap: 64px;
}
.eyebrow {
  margin: 0 0 20px;
  color: #bed4f6;
  font-size: .82rem;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
}
h1, h2, h3 {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-weight: 850;
  line-height: 1.05;
}
h1 { max-width: 760px; margin: 0; font-size: clamp(3rem, 5vw, 5rem); font-weight: 760; letter-spacing: -.045em; }
h1 span { display: block; white-space: nowrap; }
.hero-copy { max-width: 630px; margin: 28px 0 0; color: #dbe7f5; font-size: 1.2rem; }
.actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 22px;
  border: 2px solid transparent;
  border-radius: 7px;
  text-decoration: none;
  font-weight: 800;
}
.button-primary { background: var(--red); color: var(--white); }
.button-primary:hover, .button-primary:focus-visible { background: #bd2e3c; }
.button-secondary { border-color: rgba(255,255,255,.55); color: var(--white); }
.button-secondary:hover, .button-secondary:focus-visible { border-color: var(--white); background: rgba(255,255,255,.08); }

.pattern-panel { position: relative; min-height: 360px; }
.pattern-grid {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(4, 1fr);
  gap: 12px;
  transform: rotate(-5deg);
}
.pattern-grid span { border: 1px solid rgba(255,255,255,.28); border-radius: 10px; background: rgba(255,255,255,.06); }
.pattern-grid span:nth-child(3), .pattern-grid span:nth-child(6), .pattern-grid span:nth-child(12) { background: var(--blue); border-color: var(--blue); }
.pattern-grid span:nth-child(8) { background: var(--red); border-color: var(--red); }
.pattern-note {
  position: absolute;
  right: 20px;
  bottom: 32px;
  width: min(280px, 80%);
  padding: 22px;
  color: var(--navy);
  background: var(--white);
  border-radius: 10px;
  box-shadow: var(--shadow);
  transform: rotate(2deg);
}
.pattern-note strong { display: block; font-size: 1.45rem; font-weight: 850; line-height: 1.15; letter-spacing: -.025em; }
.pattern-note span { display: block; margin-top: 8px; color: var(--muted); }

.section { width: min(1120px, calc(100% - 40px)); margin: auto; padding: 96px 0; }
.section-heading { max-width: 720px; }
.section-heading h2 { margin: 0; color: var(--navy); font-size: clamp(2.35rem, 5vw, 4.4rem); letter-spacing: -.04em; }
.section-heading p { margin: 20px 0 0; color: var(--muted); font-size: 1.1rem; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 44px; }
.card { padding: 30px; background: var(--white); border: 1px solid var(--line); border-radius: 12px; box-shadow: 0 10px 28px rgba(16,42,67,.06); }
.card-number { color: var(--red); font-weight: 900; letter-spacing: .12em; }
.card h3 { margin: 42px 0 12px; color: var(--navy); font-size: 1.65rem; }
.card p { margin: 0; color: var(--muted); }

.book-strip { background: var(--blue); color: var(--white); }
.book-inner { width: min(1120px, calc(100% - 40px)); margin: auto; padding: 78px 0; display: grid; grid-template-columns: 220px 1fr; gap: 56px; align-items: center; }
.book-cover { width: 100%; display: block; border-radius: 4px; box-shadow: 0 20px 44px rgba(7,25,46,.34); }
.book-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }
.button-muted { color: #dce8fb; border-color: rgba(255,255,255,.45); cursor: default; }
.book-inner h2 { margin: 0; font-size: clamp(2.2rem, 4vw, 4rem); letter-spacing: -.035em; }
.book-inner p { max-width: 700px; margin: 16px 0 0; color: #dce8fb; }

.contact-section { background: var(--white); }
.contact-inner { width: min(1120px, calc(100% - 40px)); margin: auto; padding: 76px 0; display: flex; align-items: center; justify-content: space-between; gap: 50px; }
.contact-copy { max-width: 650px; }
.contact-copy h2 { margin: 0; color: var(--navy); font-size: clamp(2.1rem, 4vw, 3.7rem); letter-spacing: -.035em; }
.contact-copy p { margin: 16px 0 0; color: var(--muted); font-size: 1.08rem; }
.contact-email { display: inline-block; margin-top: 12px; color: var(--blue); font-weight: 800; text-decoration-thickness: 1px; text-underline-offset: 4px; }
.contact-email:hover, .contact-email:focus-visible { color: var(--red); }
.whatsapp-button { color: #fff; background: #167d4b; white-space: nowrap; }
.whatsapp-button:hover, .whatsapp-button:focus-visible { background: #10663c; }
.whatsapp-icon { width: 22px; height: 22px; flex: 0 0 auto; }
.whatsapp-float { position: fixed; right: 22px; bottom: 22px; z-index: 20; min-height: 50px; display: inline-flex; align-items: center; gap: 9px; padding: 12px 17px; color: #fff; background: #167d4b; border-radius: 999px; box-shadow: 0 12px 30px rgba(16,42,67,.25); text-decoration: none; font-weight: 800; }
.whatsapp-float:hover, .whatsapp-float:focus-visible { background: #10663c; }

.page-hero { color: var(--white); background: var(--background-blue); }
.page-hero-inner { width: min(1120px, calc(100% - 40px)); margin: auto; padding: 80px 0 70px; }
.page-hero h1 { font-size: clamp(3rem, 7vw, 5.8rem); }
.page-hero p { max-width: 670px; margin: 22px 0 0; color: #dbe7f5; font-size: 1.15rem; }
.audio-layout { width: min(1120px, calc(100% - 40px)); margin: auto; padding: 70px 0 100px; display: grid; grid-template-columns: 300px 1fr; gap: 34px; align-items: start; }
.unit-list { display: grid; gap: 9px; }
.unit-button {
  width: 100%;
  min-height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  color: var(--navy);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 7px;
  font: inherit;
  font-weight: 800;
  text-align: left;
  cursor: pointer;
}
.unit-button:hover, .unit-button:focus-visible { border-color: var(--blue); }
.unit-button[aria-current] { color: var(--white); background: var(--blue); border-color: var(--blue); }
.unit-button[data-type="revision"] { color: #a52c39; background: #fff6f7; border-color: #eccbd0; }
.unit-button[data-type="revision"][aria-current] { color: var(--white); background: var(--red); border-color: var(--red); }
.unit-button span:last-child { font-size: 1.2rem; }
.audio-panel { min-height: 390px; padding: clamp(28px, 5vw, 54px); background: var(--white); border: 1px solid var(--line); border-radius: 12px; box-shadow: var(--shadow); }
.audio-panel .label { color: var(--red); font-weight: 900; letter-spacing: .12em; text-transform: uppercase; }
.audio-panel h2 { margin: 12px 0 16px; color: var(--navy); font-size: clamp(2rem, 4vw, 3.5rem); }
.audio-panel p { color: var(--muted); }
.empty-state { margin-top: 34px; padding: 24px; background: #f1f5fa; border-left: 4px solid var(--blue); }
.empty-state strong { display: block; color: var(--navy); }

.site-footer { color: #cfdaE6; background: #0b2034; }
.footer-inner { width: min(1120px, calc(100% - 40px)); margin: auto; padding: 48px 0; display: flex; justify-content: space-between; gap: 30px; }
.footer-inner strong { color: var(--white); }
.footer-inner a { color: var(--white); }
.footer-links { display: flex; flex-wrap: wrap; gap: 12px 24px; align-content: flex-start; }

@media (max-width: 820px) {
  .hero-inner { grid-template-columns: 1fr; gap: 52px; padding-top: 64px; }
  .pattern-panel { min-height: 290px; }
  .cards { grid-template-columns: 1fr; }
  .book-inner { grid-template-columns: 170px 1fr; align-items: start; }
  .contact-inner { align-items: flex-start; flex-direction: column; gap: 28px; }
  .audio-layout { grid-template-columns: 1fr; }
  .unit-list { grid-template-columns: repeat(3, 1fr); }
  .unit-button { justify-content: center; }
  .unit-button span:last-child { display: none; }
}
@media (max-width: 560px) {
  .nav { width: min(100% - 28px, 1120px); min-height: 64px; flex-wrap: wrap; gap: 12px; padding-block: 10px; }
  .nav-links { gap: 12px; }
  .whatsapp-button { max-width: 100%; white-space: normal; }
  .brand-text { font-size: .95rem; }
  .nav-links a:first-child { display: none; }
  .instagram-link span { display: none; }
  .hero-inner, .section, .book-inner, .contact-inner, .page-hero-inner, .audio-layout, .footer-inner { width: min(100% - 28px, 1120px); }
  .hero-inner { min-height: 0; padding: 58px 0 64px; }
  h1 { font-size: 2.85rem; line-height: 1.08; letter-spacing: -.035em; }
  h1 span { white-space: normal; }
  .hero-copy { font-size: 1.06rem; }
  .pattern-panel { min-height: 250px; }
  .section { padding: 72px 0; }
  .book-inner { grid-template-columns: 120px 1fr; gap: 22px; }
  .book-inner h2 { font-size: 2rem; }
  .unit-list { grid-template-columns: repeat(3, 1fr); }
  .unit-button { padding-inline: 8px; }
  .footer-inner { flex-direction: column; }
  .whatsapp-float { position: static; display: flex; width: max-content; margin: 0 14px 24px auto; padding: 13px; }
  .whatsapp-float span { display: none; }
}

.audio-track {padding:18px 0;border-top:1px solid var(--line);scroll-margin-top:100px;}
.audio-track h3 {margin:0 0 12px;}
.audio-track audio {display:block;width:100%;max-width:100%;}
.audio-download { display: inline-flex; align-items: center; min-height: 44px; margin-top: 4px; color: var(--blue); font-size: .88rem; text-underline-offset: 4px; }
.audio-error { border-left: 3px solid var(--red); padding-left: 12px; }
.listening-links { display: grid; gap: 12px; }
[hidden] { display: none !important; }
.unit-button {text-decoration:none;}
.audio-panel {min-width:0;}

/* Shared navigation and the two main pages. */
button, select { font: inherit; }
button { cursor: pointer; }
img { max-width: 100%; height: auto; }
:focus-visible { outline: 3px solid #f1b43a; outline-offset: 4px; }
[id] { scroll-margin-top: 100px; }
.skip-link { position: fixed; top: -80px; left: 16px; z-index: 100; padding: 12px 18px; background: white; color: var(--navy); border: 2px solid var(--blue); }
.skip-link:focus { top: 12px; }
.menu-toggle { display: none; }
.nav-links a[aria-current="page"] { text-decoration: underline; text-decoration-color: var(--red); text-underline-offset: 8px; text-decoration-thickness: 2px; }
.nav-links .nav-audio { padding: 9px 15px; background: var(--blue); color: white; border-radius: 6px; }
.hero-quick-link { display: inline-block; margin-top: 24px; font-size: .95rem; color: #dbe7f5; text-underline-offset: 5px; }
.hero-inner { grid-template-columns: minmax(0,1.25fr) minmax(0,.75fr); min-height: 610px; gap: 50px; }
.hero-book { position: relative; display: flex; flex-direction: column; align-items: center; padding: 22px 0 0; }
.hero-book .pattern-grid { inset: 0 0 110px; opacity: .55; }
.cover-link { position: relative; width: 224px; transform: rotate(3deg); transition: transform .2s; filter: drop-shadow(0 22px 26px rgba(0,0,0,.3)); }
.cover-link:hover { transform: rotate(0); }
.cover-link img { display: block; border-radius: 3px; }
.book-caption { position: relative; align-self: flex-start; width: 280px; max-width: 100%; padding: 18px 22px; background: white; color: var(--navy); border-radius: 8px; margin-top: -4px; box-shadow: var(--shadow); transform: rotate(-2deg); }
.book-caption strong { display: block; margin: 4px 0; font-size: 1.6rem; line-height: 1.1; }
.book-caption > span:last-child { font-size: .9rem; color: var(--muted); }
.mini-label { display: block; font-size: .73rem; text-transform: uppercase; letter-spacing: .1em; font-weight: 800; }
.section-heading .eyebrow, .contact-wrap .eyebrow, .teacher-note .mini-label { color: #b62a3b; }
.section-heading .eyebrow { margin-bottom: 18px; }
.lesson-intro { display: grid; grid-template-columns: minmax(0,1.5fr) minmax(0,1fr); align-items: end; gap: 70px; }
.lesson-intro .section-heading h2 { font-size: clamp(2.35rem,4vw,3.8rem); }
.teacher-note { padding: 28px 30px; border: 1px solid var(--line); border-left: 4px solid var(--blue); background: white; border-radius: 8px; }
.teacher-note h3 { font-size: 1.5rem; margin: 15px 0; }
.teacher-note p { color: var(--muted); }
.about-section { background: #edf2f8; }
.about-inner { display: grid; grid-template-columns: minmax(0,340px) minmax(0,1fr); align-items: start; gap: 64px; }
.about-portrait { margin: 0; }
.about-portrait img { display: block; width: 100%; height: auto; border-radius: 12px; box-shadow: var(--shadow); }
.about-copy { min-width: 0; }
.about-copy .eyebrow { margin: 0 0 18px; color: #b62a3b; }
.about-copy h2 { margin: 0; color: var(--navy); font-size: clamp(2.2rem,4.5vw,3.4rem); letter-spacing: -.035em; }
.about-role { margin: 14px 0 26px; color: var(--blue); font-size: .9rem; font-weight: 750; }
.about-copy p:not(.eyebrow):not(.about-role) { color: #46566a; line-height: 1.75; }
.about-lead { font-size: 1.1rem; }
.about-copy p a { color: var(--blue); font-weight: 700; text-underline-offset: 4px; }
.about-actions { display: flex; flex-wrap: wrap; gap: 16px 24px; align-items: center; margin-top: 28px; }
.about-actions .text-link { display: inline-flex; min-height: 44px; align-items: center; }
.text-link { color: var(--blue); font-weight: 800; text-decoration-thickness: 1px; text-underline-offset: 5px; }
.card h3 { margin-top: 26px; }
.contact-wrap { padding-block: 78px; }
.contact-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 16px; margin-top: 38px; }
.contact-card { display: block; padding: 25px 22px; background: var(--cream); border: 1px solid var(--line); border-radius: 10px; text-decoration: none; transition: transform .15s, border-color .15s; }
.contact-card:hover { transform: translateY(-3px); border-color: var(--blue); }
.contact-card .mini-label { color: var(--muted); }
.contact-card h3 { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin: 24px 0 16px; font-size: 1.4rem; }
.contact-card p { font-size: .9rem; margin: 0; color: var(--muted); overflow-wrap: anywhere; }
.contact-primary { background: var(--background-blue); color: white; border-color: var(--background-blue); }
.contact-primary p, .contact-primary .mini-label { color: #dbe7f5; }
.contact-small { margin: 28px 0 0; color: var(--muted); }
.contact-small a { color: var(--blue); font-weight: 700; }
.footer-inner { align-items: start; }
.footer-credit { display: block; margin-top: 14px; font-size: .85rem; }
.footer-links { max-width: 450px; }
.footer-links a { display: inline-flex; align-items: center; min-height: 44px; text-underline-offset: 4px; }
.resources-book-inner { width: min(1120px,calc(100% - 40px)); margin: auto; padding: 64px 0 70px; display: grid; grid-template-columns: minmax(0,1fr) 250px; gap: 95px; align-items: center; }
.resources-book-inner h1 { font-size: clamp(3.5rem,6.5vw,5.5rem); }
.resources-book-inner p { max-width: 650px; color: #dbe7f5; }
.resources-book-inner .eyebrow { color: #bed4f6; margin: 0 0 22px; }
.resources-book-inner .book-subtitle { font-size: 1.5rem; font-weight: 750; color: white; margin: 15px 0; line-height: 1.35; }
.level-pill { display: inline-block; border: 1px solid #7291b9; border-radius: 5px; padding: 4px 12px; font-size: .8rem; margin: 0 0 18px; }
.resource-cover { display: block; width: 250px; border-radius: 4px; box-shadow: 0 20px 44px rgba(0,0,0,.3); transform: rotate(2deg); }
.book-facts { display: flex; gap: 12px 24px; flex-wrap: wrap; font-size: .85rem; color: #bed4f6; margin-top: 30px; }
.book-facts span { display: flex; align-items: center; gap: 9px; }
.book-facts span::before { content: ''; width: 5px; height: 5px; border-radius: 50%; background: #b5cff6; }
.resource-shortcuts { display: flex; flex-wrap: wrap; gap: 12px 35px; justify-content: center; background: white; border-bottom: 1px solid var(--line); padding: 18px 20px; }
.resource-shortcuts a { color: var(--navy); text-decoration: none; font-weight: 750; min-height: 30px; display: flex; align-items: center; }
.resource-shortcuts a:hover { color: var(--red); }
.coming-soon-section { background: #edf2f8; }
.coming-soon-inner { display: grid; grid-template-columns: minmax(0,280px) minmax(0,1fr); align-items: center; gap: 72px; }
.coming-soon-cover { margin: 0; }
.coming-soon-cover img { display: block; width: 100%; height: auto; border-radius: 5px; box-shadow: var(--shadow); }
.coming-soon-copy { min-width: 0; }
.coming-soon-badge { display: inline-block; margin: 0 0 22px; padding: 5px 14px; border-radius: 30px; background: #fff2c2; color: #684900; font-weight: 800; font-size: .85rem; }
.coming-soon-copy .eyebrow { color: #b62a3b; margin: 0 0 12px; }
.coming-soon-copy h2 { margin: 0; font-size: clamp(2.1rem,4.5vw,3.5rem); color: var(--navy); line-height: 1.15; letter-spacing: -.03em; }
.kids-subtitle { color: var(--blue); font-weight: 750; margin: 18px 0 24px; }
.coming-soon-copy p:not(.eyebrow):not(.coming-soon-badge):not(.kids-subtitle) { color: #46566a; }
.coming-soon-copy .button { margin-top: 12px; }
.audio-start { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 28px 0; border-bottom: 1px solid var(--line); margin: 12px 0 28px; }
label { display: block; font-size: .9rem; font-weight: 750; color: var(--navy); margin-bottom: 10px; }
.jump-form { display: flex; gap: 12px; }
select { min-height: 50px; padding: 10px 38px 10px 14px; color: var(--navy); background: white; border: 1px solid #8a99aa; border-radius: 6px; min-width: 235px; max-width: 100%; }
.button-blue { background: var(--blue); color: white; }
.button-blue:hover { background: var(--blue-dark); }
.resource-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 16px; }
.resource-card { display: flex; flex-direction: column; padding: 22px; background: white; border: 1px solid var(--line); border-radius: 10px; text-decoration: none; transition: border-color .15s, transform .15s; }
.resource-card:hover { border-color: var(--blue); transform: translateY(-2px); }
.resource-kind { color: var(--muted); font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; font-weight: 750; }
.resource-card strong { font-size: 1.35rem; color: var(--navy); margin: 12px 0; }
.resource-card > span:last-child { display: flex; justify-content: space-between; font-size: .86rem; color: var(--muted); gap: 12px; }
.revision-card { background: #fff2f3; border-color: #e9c2c7; }
.revision-card strong, .revision-card .resource-kind { color: #a52c39; }
.help-details { margin-top: 28px; border: 1px solid var(--line); background: white; border-radius: 8px; }
.help-details summary { cursor: pointer; padding: 18px 22px; color: var(--navy); font-weight: 750; }
.help-details > div { padding: 0 22px 12px; color: var(--muted); }
.support-section { background: #e9eef5; }
.support-inner { width: min(1120px,calc(100% - 40px)); margin: auto; padding: 74px 0; display: grid; grid-template-columns: 1.4fr 1fr; gap: 100px; align-items: center; }
.support-inner h2 { font-size: clamp(2.2rem,4vw,3.6rem); margin: 0; color: var(--navy); letter-spacing: -.03em; }
.support-inner p { color: var(--muted); max-width: 570px; }
.support-inner .eyebrow { color: #b62a3b; }
.support-actions { display: flex; flex-direction: column; align-items: stretch; gap: 14px; }
.support-actions .text-link { text-align: center; padding: 10px; }
.button-outline { color: var(--navy); border-color: var(--navy); }
.button-outline:hover { background: white; }
.audio-back { display: inline-block; color: #dbe7f5; margin-bottom: 25px; text-underline-offset: 5px; font-size: .95rem; }
.panel-book-link { display: block; width: max-content; max-width: 100%; color: var(--blue); margin: 0 0 24px; font-size: .9rem; font-weight: 750; text-underline-offset: 4px; }
.audio-panel .label { display: block; }
.audio-mobile-jump { display: none; }
.audio-pagination { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 20px; margin-top: 30px; padding-top: 25px; border-top: 1px solid var(--line); }
.audio-pagination a { color: var(--blue); font-weight: 750; min-height: 44px; display: inline-flex; align-items: center; text-underline-offset: 4px; }
@media (max-width: 1000px) {
  .nav-links { gap: 16px; font-size: .93rem; }
  .hero-inner { gap: 28px; }
  .hero h1 { font-size: clamp(2.8rem,5.6vw,4.5rem); }
  .contact-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .resources-book-inner { gap: 55px; }
  .resource-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
  .lesson-intro { gap: 35px; }
}
@media (max-width: 820px) {
  .coming-soon-inner { grid-template-columns: minmax(0,220px) minmax(0,1fr); gap: 32px; }
  .hero-inner { grid-template-columns: 1fr; padding-block: 60px; }
  .about-inner { grid-template-columns: minmax(0,220px) minmax(0,1fr); gap: 32px; }
  .hero-book { width: min(390px,100%); margin: 22px auto 0; }
  .hero h1 { font-size: clamp(2.8rem,7.5vw,4.5rem); }
  .lesson-intro { grid-template-columns: 1fr; gap: 30px; }
  .resources-book-inner { grid-template-columns: minmax(0,1fr) 180px; gap: 35px; }
  .resource-cover { width: 180px; }
  .support-inner { gap: 35px; }
  .audio-layout { gap: 22px; }
  .audio-mobile-jump { display: block; width: 100%; }
  .audio-mobile-jump select { width: 100%; }
  .audio-mobile-jump .text-link { display: inline-block; padding: 10px 0; }
  .audio-layout .unit-list { display: none; }
}
@media (max-width: 900px) {
  .nav { min-height: 68px; flex-wrap: wrap; gap: 0; padding-block: 12px; }
  .menu-toggle { display: inline-flex; gap: 10px; align-items: center; padding: 8px 10px; background: transparent; border: 1px solid #8a99aa; border-radius: 5px; color: var(--navy); font-weight: 700; min-height: 44px; }
  .nav-links { display: flex; width: 100%; flex-wrap: wrap; gap: 4px 20px; padding-top: 8px; }
  .nav-links a { min-height: 44px; display: inline-flex; align-items: center; }
  .nav-links a:first-child { display: inline-flex; }
  .nav-links .nav-audio { padding: 7px 13px; }
  .js .nav-links { display: none; }
  .js .nav-links.is-open { display: flex; }
}
@media (max-width: 700px) {
  .coming-soon-inner { grid-template-columns: 1fr; gap: 36px; }
  .coming-soon-cover { width: min(260px,100%); margin-inline: auto; }
  .about-inner { grid-template-columns: 1fr; gap: 32px; }
  .about-portrait { width: min(320px,100%); margin-inline: auto; }
  .resources-book-inner { grid-template-columns: 1fr; }
  .resource-cover { width: 185px; justify-self: center; margin-top: 10px; }
  .resource-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .audio-start { align-items: flex-start; flex-direction: column; }
  .support-inner { grid-template-columns: 1fr; }
  .support-actions { max-width: 400px; }
  .resource-shortcuts { justify-content: flex-start; gap: 10px 24px; font-size: .9rem; }
}
@media (max-width: 560px) {
  .hero-inner, .resources-book-inner, .support-inner { width: calc(100% - 32px); }
  .brand { gap: 8px; }
  .brand-mark { width: 30px; height: 32px; }
  .brand-text { font-size: .9rem; }
  .menu-toggle { font-size: .85rem; }
  .hero h1 { font-size: clamp(2.4rem,10vw,3.6rem); }
  .hero-copy { font-size: 1.05rem; }
  .hero-quick-link { font-size: .9rem; }
  .section-heading h2 { font-size: clamp(2rem,8.5vw,3rem); }
  .lesson-intro .section-heading h2 { font-size: clamp(2rem,8.5vw,3rem); }
  .contact-grid { gap: 12px; }
  .contact-card { padding: 20px 16px; }
  .contact-card h3 { font-size: 1.2rem; }
  .contact-card .mini-label { font-size: .68rem; letter-spacing: .05em; }
  .resources-book-inner { padding-block: 44px 52px; }
  .resources-book-inner .book-subtitle { font-size: 1.3rem; }
  .resource-card { padding: 18px 15px; }
  .resource-card strong { font-size: 1.15rem; }
  .jump-form { flex-wrap: wrap; }
  .jump-form select { flex: 1; width: 100%; min-width: 0; }
  .jump-form .button { padding-inline: 16px; }
  .audio-panel { padding: 24px 18px; }
  .page-hero-inner { padding-block: 42px; }
  .page-hero h1 { font-size: 2.8rem; }
  .footer-links { gap: 4px 22px; }
}
@media (max-width: 360px) {
  .contact-grid { grid-template-columns: 1fr; }
  .contact-card h3 { margin-top: 16px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}

@media (max-width: 560px) {
  .audio-track { scroll-margin-top: 120px; }
}