/* Thinkera Academy — site styles. Mobile first: the base rules are the phone layout (most students read on one),
 * and every media query adds to it with min-width. RTL first too: every direction-dependent rule uses logical
 * properties, so the English (LTR) pages mirror without a second stylesheet.
 *
 * Breakpoints: 481px (large phone) · 681px (small tablet) · 961px (tablet) · 1025px (desktop, the menu opens out).
 * Nothing interactive is smaller than 44px, and no text on a phone is under 14px.
 */

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--tk-bg-page);
  color: var(--tk-text);
  font-family: var(--tk-font-ar);
  font-size: var(--tk-size-base);
  line-height: var(--tk-leading-body);
  letter-spacing: 0;               /* Arabic is joined: never track it */
  overflow-x: hidden;              /* a decorative circle must never make the page scroll sideways */
}

:lang(en) body, body:lang(en) { font-family: var(--tk-font-latin); }

/* Labels (badges, tags) are 13px on a large screen and 14px on a phone: small print read at arm's length. */
:root { --tk-size-xs: 0.875rem; }

h1, h2, h3, h4 {
  margin: 0 0 var(--tk-space-4);
  color: var(--tk-text-strong);
  line-height: var(--tk-leading-tight);
  font-weight: var(--tk-weight-semibold);
  text-wrap: balance;
}
h1 { font-size: var(--tk-size-xl); font-weight: var(--tk-weight-bold); }
h2 { font-size: var(--tk-size-lg); }
h3 { font-size: var(--tk-size-md); }
p { margin: 0 0 var(--tk-space-4); max-width: var(--tk-measure); }
/* an image that is given a width keeps its own proportions: without this, the width/height attributes
   (1280x720) stretch it to 720px tall at every screen width */
img, svg { max-width: 100%; }
img { height: auto; }
ul, ol { margin: 0 0 var(--tk-space-4); padding-inline-start: 1.4em; }
li { margin-bottom: var(--tk-space-2); }
small { font-size: var(--tk-size-sm); }
code, .num, .ltr { font-family: var(--tk-font-mono); direction: ltr; unicode-bidi: isolate; }

a { color: var(--tk-text-link); text-underline-offset: 3px; }
a:hover { color: var(--tk-text-brand); }

:focus-visible {
  outline: 3px solid var(--tk-focus);
  outline-offset: 2px;
  border-radius: var(--tk-radius-sm);
}

.skip {
  position: absolute; inset-block-start: -100px; inset-inline-start: var(--tk-space-4);
  background: var(--tk-bg-surface); color: var(--tk-text-brand); padding: var(--tk-space-3) var(--tk-space-4);
  border-radius: var(--tk-radius-sm); z-index: 20; font-weight: var(--tk-weight-semibold);
}
.skip:focus { inset-block-start: var(--tk-space-3); }

.wrap { width: 100%; max-width: var(--tk-container); margin-inline: auto; padding-inline: var(--tk-space-4); }
.narrow { max-width: var(--tk-container-narrow); }
.section { padding-block: var(--tk-space-7); }
.section-tight { padding-block: var(--tk-space-6); }
.eyebrow {
  font-size: var(--tk-size-sm); font-weight: var(--tk-weight-semibold); color: var(--tk-text-brand);
  margin-bottom: var(--tk-space-2);
}
.lead { font-size: var(--tk-size-md); color: var(--tk-text-muted); }
.muted { color: var(--tk-text-muted); }
.center { text-align: center; }
.center p { margin-inline: auto; }
.stack > * + * { margin-block-start: var(--tk-space-4); }

/* ---------------------------------------------------------------- header */
.site-header {
  position: sticky; inset-block-start: 0; z-index: 10;
  background: color-mix(in srgb, var(--tk-bg-page) 92%, transparent);
  backdrop-filter: blur(8px);
  border-block-end: 1px solid var(--tk-border);
}
.site-header .wrap {
  display: flex; align-items: center; gap: var(--tk-space-3); flex-wrap: wrap; row-gap: var(--tk-space-3);
  min-height: 60px; padding-block: var(--tk-space-2);
}
.brand-link { display: flex; align-items: center; gap: var(--tk-space-3); text-decoration: none; flex: none; min-height: 44px; }
.brand-link img { height: 28px; width: auto; }
/* the menu is a panel under the header until there is room for a row of links (1025px) */
.nav {
  display: none; position: absolute; inset-inline: 0; inset-block-start: 100%; background: var(--tk-bg-surface);
  border-block-end: 1px solid var(--tk-border); padding: var(--tk-space-3) var(--tk-space-4);
  box-shadow: var(--tk-shadow-md);
}
.nav.open { display: block; }
.nav ul { display: flex; flex-direction: column; gap: 0; list-style: none; margin: 0; padding: 0; }
.nav li { margin: 0; }
.nav a {
  display: flex; align-items: center; min-height: 48px; color: var(--tk-text); text-decoration: none;
  font-weight: var(--tk-weight-medium);
}
.nav a:hover, .nav a[aria-current="page"] { color: var(--tk-text-brand); }
.header-tools { display: flex; align-items: center; gap: var(--tk-space-2); flex: 0 1 auto; min-width: 0; margin-inline-start: auto; }
.header-tools .nav-toggle { display: inline-flex; flex: none; }
/* the narrowest phones carry one header button (the language switch) and the menu: the hero has the call to action */
.header-tools .btn--primary { display: none; }

/* ---------------------------------------------------------------- buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--tk-space-2);
  min-height: 44px; padding: var(--tk-space-3) var(--tk-space-5);
  border-radius: var(--tk-radius-pill); border: 1px solid transparent;
  font: inherit; font-weight: var(--tk-weight-semibold); text-decoration: none; cursor: pointer;
  transition: background var(--tk-speed), color var(--tk-speed), border-color var(--tk-speed);
}
.btn--primary { background: var(--tk-action-primary-bg); color: var(--tk-action-primary-text); }
.btn--primary:hover { background: var(--tk-action-primary-bg-hover); color: var(--tk-action-primary-text); }
.btn--secondary {
  background: var(--tk-action-secondary-bg); color: var(--tk-action-secondary-text);
  border-color: var(--tk-action-secondary-border);
}
.btn--secondary:hover { background: var(--tk-bg-quiet); color: var(--tk-action-secondary-text); }
.btn--quiet { padding: var(--tk-space-2) var(--tk-space-4); background: transparent; color: var(--tk-text-muted); border-color: var(--tk-border); }
.btn--quiet:hover { color: var(--tk-text-brand); }
.btn--on-dark { background: #fff; color: var(--tk-royal-700); }
.btn--on-dark:hover { background: var(--tk-accent-on-dark-hover); color: var(--tk-royal-800); }
.btn--ghost-dark { background: transparent; color: #fff; border-color: rgba(255, 255, 255, .45); }
.btn--ghost-dark:hover { background: rgba(255, 255, 255, .1); color: #fff; }
.btn-row { display: flex; flex-wrap: wrap; gap: var(--tk-space-3); }
/* on a phone a call to action fills the row: it is the easiest thing to hit with a thumb */
.btn-row > .btn { flex: 1 1 100%; }

/* ---------------------------------------------------------------- hero */
.hero { background: var(--tk-bg-hero); color: #EAF1FB; padding-block: var(--tk-space-7) 0; position: relative; overflow: hidden; }
.hero::before, .hero::after {
  content: ""; position: absolute; border-radius: 50%; pointer-events: none;
  border: 28px solid rgba(66, 110, 181, .30);
}
.hero::before { inline-size: 420px; block-size: 420px; inset-block-start: -180px; inset-inline-end: -160px; }
.hero::after { inline-size: 260px; block-size: 260px; inset-block-end: -140px; inset-inline-start: -90px; border-color: rgba(66, 110, 181, .20); }
.hero .wrap { position: relative; z-index: 1; display: grid; gap: var(--tk-space-6); grid-template-columns: 1fr; align-items: end; }
.hero-copy { padding-block-end: var(--tk-space-7); }
.hero h1 { color: #fff; }
.hero h1 .spark { display: block; color: var(--tk-accent-on-dark); }
.hero p { color: #C7D6EA; font-size: var(--tk-size-md); }
.hero .eyebrow { color: var(--tk-accent-on-dark); }
.hero-facts { display: flex; flex-wrap: wrap; gap: var(--tk-space-4) var(--tk-space-6); margin-block-start: var(--tk-space-5); padding: 0; list-style: none; }
.hero-facts li { margin: 0; max-inline-size: 15ch; }
.hero-facts b { display: block; font-family: var(--tk-font-latin); font-size: var(--tk-size-xl); color: #fff; line-height: 1.05; }
.hero-facts span { font-size: var(--tk-size-sm); color: #C7D6EA; line-height: 1.5; display: block; }
.hero-art { display: none; align-self: end; justify-content: center; }
.hero-art img { display: block; block-size: min(520px, 62vh); inline-size: auto; }

/* ---------------------------------------------------------------- cards and grids */
.grid { display: grid; gap: var(--tk-space-5); grid-template-columns: 1fr; }
.card {
  background: var(--tk-bg-surface); border: 1px solid var(--tk-border); border-radius: var(--tk-radius-md);
  padding: var(--tk-space-5); box-shadow: var(--tk-shadow-sm);
}
.card h3 { margin-bottom: var(--tk-space-2); }
.card p:last-child { margin-bottom: 0; }

.course-card { display: flex; flex-direction: column; gap: var(--tk-space-3); transition: border-color var(--tk-speed), transform var(--tk-speed); }
/* the whole card is the tap target on a phone: the title's link covers it, the buttons in the footer sit on top */
.course-card { position: relative; }
.course-card .ccard-title a::after { content: ""; position: absolute; inset: 0; border-radius: inherit; }
.course-card .foot, .course-card .badge, .course-card .meta { position: relative; z-index: 1; }
.course-card:hover { border-color: var(--tk-border-strong); transform: translateY(-2px); }
.course-card .thumb {
  aspect-ratio: 16 / 9; border-radius: var(--tk-radius-sm); background: var(--tk-bg-brand);
  display: grid; place-items: center; overflow: hidden;
}
.course-card .thumb img { inline-size: 46%; }
.course-card .thumb--photo img { inline-size: 100%; block-size: 100%; object-fit: cover; }
.course-card h3 { font-size: var(--tk-size-md); margin: 0; }
.course-card h3 a { color: var(--tk-text-strong); text-decoration: none; }
.course-card h3 a:hover { color: var(--tk-text-brand); }
.course-card .meta { display: flex; flex-wrap: wrap; gap: var(--tk-space-2) var(--tk-space-4); font-size: var(--tk-size-sm); color: var(--tk-text-muted); }
.course-card .spacer { flex: 1; }
.course-card .badge { align-self: flex-start; }
.course-card .foot { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: var(--tk-space-3); border-block-start: 1px solid var(--tk-border); padding-block-start: var(--tk-space-3); }
.course-card .foot .btn { flex: 1 1 auto; }
.price { font-family: var(--tk-font-latin); font-weight: var(--tk-weight-bold); color: var(--tk-text-strong); }
.price small { display: block; font-family: var(--tk-font-ar); font-weight: var(--tk-weight-regular); color: var(--tk-text-muted); }

.badge {
  display: inline-flex; align-items: center; gap: var(--tk-space-2); font-size: var(--tk-size-xs);
  font-weight: var(--tk-weight-semibold); padding: 3px var(--tk-space-3); border-radius: var(--tk-radius-pill);
  border: 1px solid currentColor;
}
.badge--live { color: var(--tk-good-text); background: var(--tk-good-bg); }
.badge--soon { color: var(--tk-warn-text); background: var(--tk-warn-bg); }
.badge--plain { color: var(--tk-text-muted); background: var(--tk-bg-quiet); border-color: var(--tk-border); }

.tag-row { display: flex; flex-wrap: wrap; gap: var(--tk-space-2); list-style: none; padding: 0; margin: 0; }
.tag { font-size: var(--tk-size-xs); padding: 3px var(--tk-space-3); border-radius: var(--tk-radius-pill); background: var(--tk-bg-quiet); color: var(--tk-text-muted); }

/* a card's heading level follows the page outline; its size stays the same */
.card-title, .ccard-title { font-size: var(--tk-size-md); margin-bottom: var(--tk-space-2); }
.course-card .ccard-title { font-size: var(--tk-size-md); margin: 0; }
.course-card .ccard-title a { color: var(--tk-text-strong); text-decoration: none; }
.course-card .ccard-title a:hover { color: var(--tk-text-brand); }

/* ---------------------------------------------------------------- course page */
.course-head { background: var(--tk-bg-surface); border-block-end: 1px solid var(--tk-border); padding-block: var(--tk-space-6); }
.course-head .wrap { display: grid; grid-template-columns: 1fr; gap: var(--tk-space-6); align-items: start; }
.breadcrumb { font-size: var(--tk-size-sm); color: var(--tk-text-muted); margin-bottom: var(--tk-space-4); }
.breadcrumb a { color: var(--tk-text-muted); }
.buy-card { background: var(--tk-bg-raised); border: 1px solid var(--tk-border); border-radius: var(--tk-radius-lg); padding: var(--tk-space-5); box-shadow: var(--tk-shadow-md); }
.buy-card .price { font-size: var(--tk-size-xl); line-height: 1.1; }
.buy-card ul { list-style: none; padding: 0; margin-block: var(--tk-space-4); }
.buy-card li { display: flex; gap: var(--tk-space-3); font-size: var(--tk-size-sm); }
.buy-card li::before { content: "✓"; color: var(--tk-good-text); font-weight: var(--tk-weight-bold); }

.unit-list { list-style: none; padding: 0; margin: 0; border: 1px solid var(--tk-border); border-radius: var(--tk-radius-md); overflow: hidden; background: var(--tk-bg-surface); }
.unit-list li { display: grid; grid-template-columns: auto 1fr; gap: var(--tk-space-2) var(--tk-space-4); align-items: baseline; margin: 0; padding: var(--tk-space-4); border-block-end: 1px solid var(--tk-border); }
.unit-list li:last-child { border-block-end: 0; }
.unit-list .n { font-family: var(--tk-font-latin); color: var(--tk-text-brand); font-weight: var(--tk-weight-bold); }
.unit-list .c { grid-column: 2; font-size: var(--tk-size-sm); color: var(--tk-text-muted); }
.unit-list .name { display: flex; flex-wrap: wrap; align-items: center; gap: var(--tk-space-2) var(--tk-space-3); }
.unit-list li.is-added { background: var(--tk-bg-accent-quiet); }
.unit-flag { font-size: var(--tk-size-xs); font-weight: var(--tk-weight-semibold); color: var(--tk-text-brand); border: 1px solid currentColor; border-radius: var(--tk-radius-pill); padding: 0 var(--tk-space-3); }

.faq { border-block-start: 1px solid var(--tk-border); }
.faq details { border-block-end: 1px solid var(--tk-border); }
.faq summary {
  cursor: pointer; font-weight: var(--tk-weight-semibold); color: var(--tk-text-strong); list-style: none;
  display: flex; align-items: center; justify-content: space-between; gap: var(--tk-space-4);
  min-height: 56px; padding-block: var(--tk-space-3);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--tk-text-brand); font-weight: var(--tk-weight-bold); font-size: var(--tk-size-md); }
.faq details[open] summary::after { content: "−"; }
.faq p { margin-block: 0 var(--tk-space-4); }

/* a lesson preview: a real frame from a produced lesson, with a play badge over it */
.poster { margin: var(--tk-space-5) 0 0; position: relative; }
.poster img { display: block; width: 100%; border-radius: var(--tk-radius-md); border: 1px solid var(--tk-border); }
.poster-play {
  position: absolute; inset-block-start: 50%; inset-inline-start: 50%; transform: translate(50%, -50%);
  inline-size: 64px; block-size: 64px; border-radius: 50%; background: rgba(10, 22, 40, .72); color: #fff;
  display: grid; place-items: center; font-size: 24px; pointer-events: none;
}
[dir="ltr"] .poster-play { transform: translate(-50%, -50%); }
.poster a { display: block; }
/* the free lessons: one card per lesson, the image becomes the player where it sits */
.lessons { list-style: none; margin: var(--tk-space-6) 0 0; padding: 0; }
.lessons .lesson { margin: 0; }
.lesson .poster { margin: 0; }
.lesson .poster img { border-radius: var(--tk-radius-md); }
.lesson-text { display: flex; align-items: baseline; gap: var(--tk-space-3); margin-block-start: var(--tk-space-3); }
.lesson-n { color: var(--tk-text-brand); font-weight: var(--tk-weight-bold); }
.lesson-title { font-size: var(--tk-size-md); margin: 0; }
.poster-blank { display: block; aspect-ratio: 16 / 9; border-radius: var(--tk-radius-md); background: var(--tk-bg-brand); }
.poster-frame { position: relative; aspect-ratio: 16 / 9; border-radius: var(--tk-radius-md); overflow: hidden; border: 1px solid var(--tk-border); background: #000; }
.poster-frame iframe { position: absolute; inset: 0; inline-size: 100%; block-size: 100%; border: 0; }
.poster figcaption { margin-block-start: var(--tk-space-3); font-size: var(--tk-size-sm); color: var(--tk-text-muted); }

/* ---------------------------------------------------------------- home: the book and what sits on top */
.band { background: var(--tk-bg-surface); border-block: 1px solid var(--tk-border); }
.comp { margin: var(--tk-space-6) 0 0; }
.comp figcaption { font-weight: var(--tk-weight-semibold); color: var(--tk-text-strong); margin-block-end: var(--tk-space-3); }
.comp-bar { display: flex; flex-direction: column; gap: 4px; }
.seg {
  display: flex; flex-direction: row; align-items: baseline; gap: var(--tk-space-3);
  padding: var(--tk-space-3) var(--tk-space-4); border-radius: var(--tk-radius-sm); color: #fff;
  min-inline-size: 0; flex: none;
}
.seg b { font-family: var(--tk-font-latin); font-size: var(--tk-size-lg); line-height: 1; }
.seg span { font-size: var(--tk-size-sm); line-height: 1.35; }
.seg--book { background: var(--tk-royal-700); }
.seg--added { background: var(--tk-azure-600); }
.seg--lab { background: var(--tk-azure-700); }
.seg--project { background: var(--tk-royal-900); }
.code-note { display: flex; gap: var(--tk-space-3); align-items: baseline; margin-block-start: var(--tk-space-5); padding: var(--tk-space-4); border-inline-start: 4px solid var(--tk-azure-600); background: var(--tk-bg-accent-quiet); border-radius: var(--tk-radius-sm); color: var(--tk-text-strong); max-width: none; }
.code-ico { font-family: var(--tk-font-mono); color: var(--tk-text-brand); font-weight: var(--tk-weight-bold); direction: ltr; flex: none; }
.layers { margin-block-start: var(--tk-space-4); }
.layer { background: var(--tk-bg-surface); border: 1px solid var(--tk-border); border-radius: var(--tk-radius-md); padding: var(--tk-space-5); }
.layer h4 { font-size: var(--tk-size-md); margin: var(--tk-space-3) 0 var(--tk-space-2); }
.layer p { margin: 0; }
.layer-badge { display: inline-block; font-family: var(--tk-font-latin); font-size: var(--tk-size-xs); font-weight: var(--tk-weight-bold); letter-spacing: .06em; padding: 3px var(--tk-space-3); border-radius: var(--tk-radius-sm); background: var(--tk-royal-700); color: #fff; }
.layer-badge--none { font-family: var(--tk-font-ar); letter-spacing: 0; background: transparent; color: var(--tk-text-muted); border: 1px dashed var(--tk-border-strong); }
.layer:nth-child(3) .layer-badge { background: var(--tk-azure-600); }
.paths { margin-block-start: var(--tk-space-5); font-weight: var(--tk-weight-medium); color: var(--tk-text-strong); }

.steps { list-style: none; padding: 0; margin: var(--tk-space-5) 0 0; display: grid; grid-template-columns: 1fr; gap: var(--tk-space-5); }
.step { margin: 0; position: relative; padding: var(--tk-space-5); border: 1px solid var(--tk-border); border-radius: var(--tk-radius-md); background: var(--tk-bg-page); }
.step-n { display: grid; place-items: center; inline-size: 44px; block-size: 44px; border-radius: 50%; background: var(--tk-royal-700); color: #fff; font-family: var(--tk-font-latin); font-weight: var(--tk-weight-bold); font-size: var(--tk-size-md); margin-block-end: var(--tk-space-4); }
.step h3 { font-size: var(--tk-size-md); margin-bottom: var(--tk-space-2); }
.step p { margin: 0; }

.life { display: grid; grid-template-columns: 1fr; gap: var(--tk-space-6); align-items: center; }
.life-img { margin: 0; }
.life-img img { display: block; inline-size: 100%; block-size: auto; border-radius: var(--tk-radius-lg); box-shadow: var(--tk-shadow-md); }
.lboxes { display: grid; grid-template-columns: 1fr; gap: var(--tk-space-4); margin-block-start: var(--tk-space-5); }
.lbox { border: 1px solid var(--tk-border); border-radius: var(--tk-radius-md); padding: var(--tk-space-4); background: var(--tk-bg-surface); }
.lbox h3 { font-family: var(--tk-font-latin); font-size: var(--tk-size-md); color: var(--tk-text-brand); margin-bottom: var(--tk-space-2); }
.lbox p { margin: 0; font-size: var(--tk-size-sm); color: var(--tk-text-muted); }

.person { border-block-start: 4px solid var(--tk-royal-700); }
.person:nth-child(2) { border-block-start-color: var(--tk-azure-600); }
.person:nth-child(3) { border-block-start-color: var(--tk-royal-900); }
.person h3 { font-size: var(--tk-size-md); }

.rules { counter-reset: r; list-style: none; padding: 0; margin: var(--tk-space-4) 0 0; display: grid; gap: var(--tk-space-3); max-inline-size: 80ch; }
.rules li { counter-increment: r; display: grid; grid-template-columns: 2.2em 1fr; gap: var(--tk-space-3); margin: 0; padding-block: var(--tk-space-3); border-block-end: 1px solid var(--tk-border); }
.rules li::before { content: counter(r); font-family: var(--tk-font-latin); font-weight: var(--tk-weight-bold); color: var(--tk-text-brand); }

.cta-band { background: var(--tk-bg-hero); color: #EAF1FB; padding-block: var(--tk-space-7); position: relative; overflow: hidden; }
.cta-band::before { content: ""; position: absolute; inline-size: 340px; block-size: 340px; border-radius: 50%; border: 24px solid rgba(66, 110, 181, .28); inset-block-start: -190px; inset-inline-start: -120px; pointer-events: none; }
.cta-band .wrap { position: relative; }
.cta-band h2 { color: #fff; }
.cta-band .lead { color: #C7D6EA; }

/* ---------------------------------------------------------------- forms */
.form { display: grid; gap: var(--tk-space-4); }
.field { display: grid; gap: var(--tk-space-2); }
.field label { font-weight: var(--tk-weight-medium); color: var(--tk-text-strong); }
.field .hint { font-size: var(--tk-size-sm); color: var(--tk-text-muted); }
.field input, .field select, .field textarea {
  font: inherit; font-size: max(16px, var(--tk-size-base));   /* under 16px iOS zooms the page on focus */
  color: var(--tk-text-strong); background: var(--tk-bg-surface);
  border: 1px solid var(--tk-border-strong); border-radius: var(--tk-radius-sm);
  padding: var(--tk-space-3) var(--tk-space-4); min-height: 48px; width: 100%;
}
.field input:focus-visible, .field select:focus-visible, .field textarea:focus-visible { border-color: var(--tk-focus); }
.field input[type="tel"], .field input[type="email"] { direction: ltr; text-align: start; }
.form-note { font-size: var(--tk-size-sm); color: var(--tk-text-muted); }
.alert { border-radius: var(--tk-radius-md); padding: var(--tk-space-4); border: 1px solid; display: flex; gap: var(--tk-space-3); }
.alert--info { background: var(--tk-bg-accent-quiet); border-color: var(--tk-border-strong); color: var(--tk-text-strong); }
.alert--warn { background: var(--tk-warn-bg); border-color: currentColor; color: var(--tk-warn-text); }

/* ---------------------------------------------------------------- footer */
.site-footer { background: var(--tk-bg-brand-deep); color: #C7D6EA; padding-block: var(--tk-space-7) var(--tk-space-5); margin-block-start: var(--tk-space-7); }
.site-footer a { color: #D7E3F5; text-decoration: none; }
.site-footer a:hover { color: var(--tk-accent-on-dark); }
.site-footer h2 { color: #fff; font-size: var(--tk-size-md); }
.site-footer .cols { display: grid; grid-template-columns: 1fr; gap: var(--tk-space-6); }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer ul li { margin: 0; }
.site-footer ul a { display: inline-flex; align-items: center; min-height: 44px; }
.site-footer img { height: 30px; width: auto; }
.site-footer .legal { border-block-start: 1px solid rgba(255,255,255,.14); margin-block-start: var(--tk-space-5); padding-block-start: var(--tk-space-4); display: flex; justify-content: space-between; gap: var(--tk-space-3); flex-wrap: wrap; font-size: var(--tk-size-sm); }

/* the sign-in link lives in the menu on a phone and moves up to the header once the menu opens out (1025px) */
.header-tools .header-signin { display: none; }

/* ================================================================ 481px — a large phone */
@media (min-width: 481px) {
  .header-tools .btn--primary { display: inline-flex; }
  .btn-row > .btn { flex: 0 1 auto; }
  .lboxes { grid-template-columns: 1fr 1fr; }
}

/* ================================================================ 681px — a small tablet */
@media (min-width: 681px) {
  :root { --tk-size-xs: 0.8125rem; }
  h1 { font-size: var(--tk-size-2xl); }
  h2 { font-size: var(--tk-size-xl); }
  h3, .card-title, .ccard-title, .step h3, .person h3 { font-size: var(--tk-size-lg); }
  .wrap { padding-inline: var(--tk-space-5); }
  .section { padding-block: var(--tk-space-8); }
  .section-tight { padding-block: var(--tk-space-7); }
  .site-header .wrap { min-height: 72px; gap: var(--tk-space-5); }
  .brand-link img { height: 34px; }
  .btn--quiet { min-height: 40px; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .course-head { padding-block: var(--tk-space-7); }
  .buy-card { padding: var(--tk-space-6); }
  .buy-card .price { font-size: var(--tk-size-2xl); }
  .unit-list li { grid-template-columns: auto 1fr auto; padding: var(--tk-space-4) var(--tk-space-5); }
  .unit-list .c { grid-column: auto; white-space: nowrap; }
  .comp-bar { flex-direction: row; min-block-size: 96px; }
  .seg { flex-direction: column; justify-content: center; align-items: stretch; gap: 2px; }
  .seg b { font-size: var(--tk-size-xl); }
  .code-note { padding: var(--tk-space-4) var(--tk-space-5); }
  .alert { padding: var(--tk-space-4) var(--tk-space-5); }
  .hero-facts b { font-size: var(--tk-size-2xl); }
  .poster-play { inline-size: 74px; block-size: 74px; font-size: 26px; }
  .site-footer .cols { grid-template-columns: 1fr 1fr; gap: var(--tk-space-7); }
  .site-footer .legal { gap: var(--tk-space-4); }
}

/* ================================================================ 961px — a tablet, the two-column layouts */
@media (min-width: 961px) {
  .hero { padding-block-start: var(--tk-space-8); }
  .hero::before { inline-size: 760px; block-size: 760px; inset-block-start: -300px; inset-inline-end: -260px; }
  .hero::after { inline-size: 420px; block-size: 420px; inset-block-end: -220px; inset-inline-start: -120px; }
  .hero .wrap { grid-template-columns: 1.35fr .65fr; }
  .hero-copy { padding-block-end: var(--tk-space-8); }
  .hero-art { display: flex; }
  .hero-facts { gap: var(--tk-space-5) var(--tk-space-7); margin-block-start: var(--tk-space-6); }
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .life { grid-template-columns: 1fr 1fr; gap: var(--tk-space-7); }
  .course-head .wrap { grid-template-columns: 1.3fr .7fr; gap: var(--tk-space-7); }
  .buy-card { position: sticky; inset-block-start: 96px; }
  .section { padding-block: var(--tk-space-9); }
  .cta-band { padding-block: var(--tk-space-8); }
  .cta-band::before { inline-size: 520px; block-size: 520px; inset-block-start: -260px; inset-inline-start: -160px; }
  .site-footer { padding-block: var(--tk-space-8) var(--tk-space-6); margin-block-start: var(--tk-space-9); }
  .site-footer .cols { grid-template-columns: 1.4fr 1fr 1fr; }
}

/* ================================================================ 1025px — the menu becomes a row of links */
@media (min-width: 1025px) {
  h1 { font-size: var(--tk-size-3xl); }
  h2 { font-size: var(--tk-size-2xl); }
  .site-header .wrap { flex-wrap: nowrap; }
  .nav {
    display: block; position: static; background: none; border: 0; padding: 0; box-shadow: none;
    margin-inline-start: auto;
  }
  .nav ul { flex-direction: row; gap: var(--tk-space-5); }
  .nav a { min-height: 0; padding-block: var(--tk-space-2); }
  .nav a[aria-current="page"] { box-shadow: inset 0 -2px 0 var(--tk-text-brand); }
  .nav .nav-signin { display: none; }
  .header-tools { margin-inline-start: 0; }
  .header-tools .nav-toggle { display: none; }
  .header-tools .header-signin { display: inline-flex; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  .course-card:hover { transform: none; }
}

@media print {
  .site-header, .site-footer, .btn { display: none; }
  body { background: #fff; color: #000; }
}