/* 0002 */
:root {
    --ink: #1d2430;
    --muted: #647084;
    --line: #dfe5ea;
    --paper: #ffffff;
    --wash: #f5f8f7;
    --teal: #007a78;
    --teal-dark: #005f61;
    --yellow: #f2c14e;
    --coral: #e95f4d;
    --green: #4f9d69;
    --blue: #2d6cdf;
    --shadow: 0 18px 42px rgba(29, 36, 48, 0.12);
    --radius: 8px;
    --max: 1180px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--ink);
    font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.75;
    letter-spacing: 0;
    background: var(--paper);
}

img {
    display: block;
    max-width: 100%;
    height: auto;
}

a {
    color: inherit;
    text-decoration: none;
}

a:hover {
    color: var(--teal);
}

h1,
h2,
h3 {
    margin: 0;
    line-height: 1.2;
    letter-spacing: 0;
}

h1 {
    font-size: 3.6rem;
}

h2 {
    font-size: 2.25rem;
}

h3 {
    font-size: 1.2rem;
}

p {
    margin: 0 0 1rem;
}

.container {
    width: min(calc(100% - 32px), var(--max));
    margin: 0 auto;
}

.skip-link {
    position: fixed;
    left: 16px;
    top: 12px;
    z-index: 1000;
    transform: translateY(-140%);
    padding: 8px 12px;
    background: var(--ink);
    color: white;
    border-radius: var(--radius);
}

.skip-link:focus {
    transform: translateY(0);
}

.topbar {
    background: var(--ink);
    color: white;
    font-size: 0.9rem;
}

.topbar-inner {
    min-height: 38px;
    display: flex;
    align-items: center;
    gap: 20px;
    justify-content: flex-end;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(14px);
}

.nav-shell {
    min-height: 78px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 250px;
}

.brand-logo {
    width: 118px;
    height: 54px;
    object-fit: contain;
}

.brand strong,
.brand small {
    display: block;
}

.brand strong {
    font-size: 1.25rem;
}

.brand small {
    color: var(--muted);
    font-size: 0.82rem;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 18px;
    font-weight: 700;
}

.site-nav a {
    padding: 8px 0;
}

.site-nav .nav-cta {
    padding: 10px 16px;
    border-radius: var(--radius);
    background: var(--teal);
    color: white;
}

.nav-toggle {
    display: none;
    border: 1px solid var(--line);
    background: white;
    border-radius: var(--radius);
    padding: 9px 12px;
    font: inherit;
    font-weight: 800;
}

.hero {
    position: relative;
    min-height: 78vh;
    display: grid;
    align-items: center;
    color: white;
    background-image: var(--hero-image);
    background-size: cover;
    background-position: center;
}

.hero-slider {
    display: block;
    overflow: hidden;
    background: var(--ink);
}

.hero-slide {
    position: absolute;
    inset: 0;
    display: grid;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    background-image: var(--hero-image);
    background-size: cover;
    background-position: center;
    transition: opacity 520ms ease;
}

.hero-slide.active {
    opacity: 1;
    pointer-events: auto;
}

.hero-overlay,
.course-hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(14, 20, 28, 0.82), rgba(14, 20, 28, 0.48), rgba(14, 20, 28, 0.18));
}

.hero-content,
.course-hero .container {
    position: relative;
    z-index: 1;
}

.hero-content {
    padding: 88px 0 78px;
}

.eyebrow {
    color: var(--coral);
    font-size: 0.88rem;
    font-weight: 900;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.hero .eyebrow,
.course-hero .eyebrow,
.cta-band .eyebrow {
    color: var(--yellow);
}

.hero-lead {
    max-width: 680px;
    margin-top: 18px;
    font-size: 1.28rem;
}

.hero-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 28px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 11px 18px;
    border: 2px solid var(--yellow);
    border-radius: var(--radius);
    background: var(--yellow);
    color: var(--ink);
    font-weight: 900;
    cursor: pointer;
    transition: transform 160ms ease, background 160ms ease, color 160ms ease;
}

.button:hover {
    transform: translateY(-1px);
    color: var(--ink);
}

.button-ghost {
    color: white;
    background: transparent;
    border-color: rgba(255, 255, 255, 0.72);
}

.button-ghost:hover {
    color: white;
    border-color: white;
}

.button-secondary {
    background: var(--teal);
    border-color: var(--teal);
    color: white;
}

.button-secondary:hover {
    color: white;
    background: var(--teal-dark);
}

.button-light {
    background: white;
    border-color: white;
}

.button.full {
    width: 100%;
}

.text-link {
    display: inline-flex;
    font-weight: 900;
    color: var(--teal-dark);
    border-bottom: 2px solid var(--yellow);
}

.hero-dots {
    position: absolute;
    z-index: 2;
    left: 50%;
    bottom: 28px;
    display: flex;
    gap: 10px;
    transform: translateX(-50%);
}

.hero-dots button {
    width: 12px;
    height: 12px;
    padding: 0;
    border: 2px solid rgba(255, 255, 255, 0.72);
    border-radius: 999px;
    background: transparent;
    cursor: pointer;
}

.hero-dots button.active {
    width: 34px;
    background: var(--yellow);
    border-color: var(--yellow);
}

.section {
    padding: 78px 0;
}

.section-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 28px;
}

.section-heading h2 {
    max-width: 720px;
}

.section-heading.narrow {
    display: block;
    max-width: 760px;
    text-align: center;
}

.intro-band {
    border-bottom: 1px solid var(--line);
}

.two-column,
.content-grid,
.split-showcase,
.contact-layout,
.course-detail-layout,
.article-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(320px, 0.8fr);
    gap: 44px;
    align-items: start;
}

.two-column {
    align-items: center;
}

.split-showcase {
    align-items: center;
}

.split-showcase.reverse {
    grid-template-columns: minmax(320px, 0.8fr) minmax(0, 1fr);
}

.split-showcase img,
.article-image {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.card-grid,
.post-grid,
.gallery-grid,
.ability-grid,
.four-grid,
.value-grid,
.testimonial-grid {
    display: grid;
    gap: 22px;
}

.card-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card-grid.three,
.post-grid,
.value-grid,
.testimonial-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.course-card,
.post-card,
.info-card,
.quote-panel,
.contact-aside,
.course-sidebar .info-card,
.four-grid article,
.ability-grid article,
.value-grid article,
.testimonial-grid article {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: white;
    box-shadow: 0 10px 26px rgba(29, 36, 48, 0.08);
}

.value-grid article {
    padding: 24px;
    border-top: 5px solid var(--teal);
}

.value-grid span {
    display: inline-flex;
    margin-bottom: 16px;
    color: var(--coral);
    font-weight: 900;
}

.course-card {
    overflow: hidden;
}

.course-card-image img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
}

.course-card-body {
    padding: 18px;
}

.label {
    display: inline-flex;
    margin: 0 0 8px;
    padding: 3px 8px;
    background: rgba(0, 122, 120, 0.1);
    color: var(--teal-dark);
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 900;
}

.course-card h3,
.post-card h3 {
    margin-bottom: 8px;
}

.course-card p,
.post-card p {
    color: var(--muted);
}

.course-meta,
.detail-list {
    margin: 16px 0;
}

.course-meta {
    display: grid;
    gap: 10px;
}

.course-meta div,
.detail-list div {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    border-top: 1px solid var(--line);
    padding-top: 10px;
}

dt {
    color: var(--muted);
    font-weight: 700;
}

dd {
    margin: 0;
    text-align: right;
    font-weight: 800;
}

.color-band {
    background: var(--ink);
    color: white;
}

.soft-band {
    background: var(--wash);
}

.ability-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.ability-grid article,
.four-grid article,
.info-card,
.quote-panel {
    padding: 24px;
}

.ability-grid article:nth-child(2n) {
    border-top: 5px solid var(--yellow);
}

.ability-grid article:nth-child(2n + 1) {
    border-top: 5px solid var(--green);
}

.color-band .ability-grid article {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.18);
    box-shadow: none;
}

.color-band p,
.color-band .faq-list p {
    color: rgba(255, 255, 255, 0.82);
}

.learning-path {
    display: grid;
    grid-template-columns: minmax(0, 0.85fr) minmax(320px, 1fr);
    gap: 44px;
    align-items: center;
}

.learning-path ol {
    display: grid;
    gap: 16px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.learning-path li {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 16px;
    padding: 20px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.08);
}

.learning-path strong {
    color: var(--yellow);
    font-size: 1.15rem;
}

.learning-path span {
    color: rgba(255, 255, 255, 0.82);
}

.gallery-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.gallery-grid.large {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.gallery-grid figure {
    position: relative;
    overflow: hidden;
    margin: 0;
    border-radius: var(--radius);
    background: var(--ink);
}

.gallery-grid img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    transition: transform 220ms ease;
}

.gallery-grid figure:hover img {
    transform: scale(1.03);
}

.gallery-grid figcaption {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 20px;
    color: white;
    background: linear-gradient(0deg, rgba(0, 0, 0, 0.76), rgba(0, 0, 0, 0));
}

.gallery-grid figcaption strong,
.gallery-grid figcaption span {
    display: block;
}

.gallery-grid figcaption span {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
}

.post-card {
    overflow: hidden;
}

.post-card img {
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
}

.post-card > div {
    padding: 18px;
}

time {
    display: block;
    color: var(--coral);
    font-weight: 900;
    margin-bottom: 8px;
}

.faq-list {
    display: grid;
    gap: 12px;
    max-width: 860px;
}

.faq-list details {
    background: white;
    color: var(--ink);
    border-radius: var(--radius);
    padding: 18px 20px;
}

.faq-list summary {
    cursor: pointer;
    font-weight: 900;
}

.faq-list p {
    margin: 12px 0 0;
    color: var(--muted);
}

.color-band .faq-list details p {
    color: var(--muted);
}

.cta-band {
    color: white;
    background: var(--teal-dark);
}

.cta-band .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
}

.cta-band h2 {
    max-width: 820px;
}

.page-hero {
    color: white;
    background: var(--ink);
}

.page-hero.compact {
    padding: 80px 0;
    background:
        linear-gradient(90deg, rgba(29, 36, 48, 0.94), rgba(0, 122, 120, 0.72)),
        url("../images/iot-sensor-project.jpg") center / cover;
}

.page-hero h1 {
    max-width: 900px;
    font-size: 2.8rem;
}

.page-hero p {
    max-width: 740px;
    font-size: 1.1rem;
}

.four-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.filter-section {
    padding-bottom: 0;
}

.course-search {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
    align-items: end;
    margin-bottom: 24px;
}

label span {
    display: block;
    margin-bottom: 6px;
    font-weight: 900;
}

input,
select,
textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 12px 13px;
    color: var(--ink);
    font: inherit;
    background: white;
}

input:focus,
select:focus,
textarea:focus,
button:focus-visible,
a:focus-visible,
summary:focus-visible {
    outline: 3px solid rgba(242, 193, 78, 0.75);
    outline-offset: 3px;
}

.category-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.category-tabs a {
    padding: 9px 13px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    font-weight: 900;
}

.category-tabs a.active {
    color: white;
    background: var(--teal);
    border-color: var(--teal);
}

.empty-state {
    grid-column: 1 / -1;
    padding: 36px;
    border: 1px dashed var(--line);
    border-radius: var(--radius);
    text-align: center;
}

.course-hero {
    position: relative;
    min-height: 520px;
    display: grid;
    align-items: center;
    color: white;
    background-image: var(--course-image);
    background-size: cover;
    background-position: center;
}

.course-hero h1 {
    max-width: 880px;
    font-size: 3rem;
}

.course-hero p {
    max-width: 720px;
    font-size: 1.16rem;
}

.course-detail-layout {
    grid-template-columns: minmax(0, 1fr) 360px;
}

.course-content {
    max-width: 760px;
}

.lead {
    color: var(--teal-dark);
    font-size: 1.2rem;
    font-weight: 800;
}

.check-list {
    padding: 0;
    margin: 18px 0 30px;
    list-style: none;
}

.check-list li {
    position: relative;
    padding-left: 28px;
    margin-bottom: 10px;
}

.check-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.72em;
    width: 14px;
    height: 8px;
    border-left: 3px solid var(--green);
    border-bottom: 3px solid var(--green);
    transform: rotate(-45deg);
}

.stem-bars {
    display: grid;
    gap: 16px;
}

.stem-bar {
    display: grid;
    grid-template-columns: 160px minmax(0, 1fr) 54px;
    gap: 14px;
    align-items: center;
}

.stem-bar span,
.stem-bar strong {
    font-weight: 900;
}

.stem-bar div {
    height: 12px;
    background: var(--line);
    border-radius: 999px;
    overflow: hidden;
}

.stem-bar i {
    display: block;
    height: 100%;
    background: var(--coral);
}

.course-sidebar {
    position: sticky;
    top: 116px;
}

.detail-list div {
    display: block;
}

.detail-list dd {
    margin-top: 4px;
    text-align: left;
}

.article-layout {
    grid-template-columns: 420px minmax(0, 1fr);
}

.article-content {
    max-width: 720px;
}

.contact-layout {
    grid-template-columns: minmax(0, 1fr) 390px;
}

.contact-form {
    display: grid;
    gap: 18px;
    padding: 28px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: white;
    box-shadow: var(--shadow);
}

.contact-intro {
    margin-bottom: 20px;
    padding: 22px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--wash);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.contact-form small,
.form-error {
    color: var(--coral);
    font-weight: 800;
}

.captcha-field {
    padding: 16px;
    border: 1px solid rgba(0, 122, 120, 0.22);
    border-radius: var(--radius);
    background: rgba(0, 122, 120, 0.06);
}

.hp-field {
    position: absolute;
    left: -10000px;
    width: 1px;
    height: 1px;
}

.notice {
    margin-bottom: 18px;
    padding: 14px 16px;
    border: 1px solid rgba(79, 157, 105, 0.42);
    border-radius: var(--radius);
    background: rgba(79, 157, 105, 0.1);
    font-weight: 900;
}

.testimonial-grid article {
    padding: 24px;
}

.testimonial-grid p {
    font-size: 1.08rem;
    color: var(--ink);
}

.testimonial-grid strong,
.testimonial-grid span {
    display: block;
}

.testimonial-grid span {
    color: var(--muted);
}

.contact-aside {
    padding: 24px;
}

.contact-aside article {
    padding: 18px 0;
    border-bottom: 1px solid var(--line);
}

.contact-aside article:last-of-type {
    border-bottom: 0;
}

.contact-box {
    margin-top: 18px;
    padding: 18px;
    border-radius: var(--radius);
    background: var(--wash);
}

.muted {
    color: var(--muted);
}

.site-footer {
    color: white;
    background: #111822;
    padding: 56px 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr 0.8fr 1fr;
    gap: 28px;
}

.site-footer h2,
.site-footer h3 {
    margin-bottom: 12px;
}

.site-footer p {
    color: rgba(255, 255, 255, 0.74);
}

.site-footer a:hover {
    color: var(--yellow);
}

.newsletter {
    display: grid;
    gap: 10px;
}

.newsletter input {
    border-color: rgba(255, 255, 255, 0.28);
}

.home-publisher-feature {
    position: relative;
    overflow: hidden;
    scroll-margin-top: 118px;
    color: white;
    background:
        radial-gradient(circle at 74% 20%, rgba(19, 170, 163, 0.25), transparent 27%),
        linear-gradient(118deg, #092638 0%, #103c55 62%, #0a2b3e 100%);
}

.home-publisher-feature::after {
    content: "";
    position: absolute;
    right: -180px;
    bottom: -300px;
    width: 650px;
    height: 650px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    box-shadow: 0 0 0 70px rgba(255, 255, 255, 0.018), 0 0 0 140px rgba(255, 255, 255, 0.012);
}

.home-publisher-feature-inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(420px, 0.92fr);
    gap: 72px;
    align-items: stretch;
    min-height: 620px;
}

.home-publisher-copy {
    position: relative;
    z-index: 4;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 84px 0;
}

.home-publisher-copy h2 {
    max-width: 720px;
    margin-bottom: 20px;
    font-size: clamp(2.25rem, 3.55vw, 3.75rem);
    scroll-margin-top: 132px;
}

.home-publisher-copy > p:not(.eyebrow) {
    max-width: 720px;
    color: rgba(255, 255, 255, 0.78);
    font-size: 1.06rem;
}

.home-publisher-copy .button {
    color: #102c3f;
    background: #f4c94f;
}

.home-publisher-copy .text-link {
    color: white;
}

.home-publisher-visual {
    position: relative;
    min-height: 620px;
    perspective: 1300px;
}

.home-publisher-visual-grid {
    position: absolute;
    inset: 70px -90px 20px 5px;
    opacity: 0.18;
    background-image: linear-gradient(rgba(255, 255, 255, 0.13) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.13) 1px, transparent 1px);
    background-size: 32px 32px;
    -webkit-mask-image: linear-gradient(90deg, transparent, black 20%, black 85%, transparent);
    mask-image: linear-gradient(90deg, transparent, black 20%, black 85%, transparent);
}

.home-publisher-page,
.home-publisher-book {
    position: absolute;
    height: auto;
    border-radius: 4px 8px 8px 4px;
    box-shadow: -18px 30px 64px rgba(0, 0, 0, 0.38);
}

.home-publisher-page {
    z-index: 1;
    top: 86px;
    left: 0;
    width: 245px;
    opacity: 0.88;
    transform: rotateY(9deg) rotateZ(-7deg);
}

.home-publisher-book {
    z-index: 2;
    right: 34px;
    bottom: -76px;
    width: 348px;
    transform: rotateY(-7deg) rotateZ(2deg);
}

.home-publisher-label {
    position: absolute;
    z-index: 5;
    right: 0;
    bottom: 46px;
    padding: 12px 16px;
    color: #102c3f;
    border-radius: 10px;
    background: #f4c94f;
    box-shadow: 0 15px 28px rgba(0, 0, 0, 0.24);
    font-size: 0.72rem;
    font-weight: 900;
    letter-spacing: 0.08em;
    line-height: 1.45;
    text-transform: uppercase;
    transform: rotate(-4deg);
}

.home-publisher-label strong {
    font-size: 1rem;
}

.publisher-points {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 12px;
}

.publisher-points span {
    padding: 7px 12px;
    border: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: 999px;
    color: rgba(255, 255, 255, 0.88);
    font-size: 0.88rem;
    font-weight: 800;
}

.contact-page-hero {
    background:
        radial-gradient(circle at 90% 0, rgba(242, 193, 78, 0.18), transparent 28%),
        linear-gradient(135deg, #f5f8f7, #eef4f2);
}

.contact-choice-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
    margin-bottom: 46px;
}

.contact-choice-grid article {
    display: flex;
    gap: 16px;
    padding: 22px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: white;
}

.contact-choice-grid article.featured {
    color: white;
    border-color: #123a52;
    background: #123a52;
    box-shadow: 0 18px 38px rgba(18, 58, 82, 0.16);
}

.contact-choice-grid article > span {
    display: grid;
    flex: 0 0 42px;
    width: 42px;
    height: 42px;
    place-items: center;
    border-radius: 50%;
    color: var(--teal-dark);
    background: rgba(0, 122, 120, 0.1);
    font-weight: 900;
}

.contact-choice-grid article.featured > span {
    color: #123a52;
    background: var(--yellow);
}

.contact-choice-grid h2 {
    margin-bottom: 6px;
    font-size: 1.15rem;
}

.contact-choice-grid p {
    margin: 0;
    color: var(--muted);
    font-size: 0.92rem;
}

.contact-choice-grid .featured p {
    color: rgba(255, 255, 255, 0.72);
}

#consultation-form {
    scroll-margin-top: 132px;
}

.contact-intro .eyebrow {
    margin-bottom: 7px;
}

.contact-intro h2 {
    margin-bottom: 10px;
}

.licensing-aside-card {
    margin: -24px -24px 28px;
    padding: 26px 24px;
    color: white;
    border-radius: var(--radius) var(--radius) 0 0;
    background: linear-gradient(145deg, #10364d, #0b2739);
}

.licensing-aside-card .eyebrow {
    color: var(--yellow);
}

.licensing-aside-card h2 {
    margin-bottom: 10px;
    font-size: 1.55rem;
}

.licensing-aside-card p:not(.eyebrow) {
    color: rgba(255, 255, 255, 0.76);
}

.licensing-aside-card .text-link {
    color: white;
}

.brightsteps-page {
    --bs-navy: #10344a;
    --bs-navy-deep: #092638;
    --bs-teal: #13aaa3;
    --bs-coral: #f46b5b;
    --bs-gold: #f4c94f;
    --bs-green: #3b9a76;
    --bs-cream: #f8f5ee;
    --bs-paper: #fffdfa;
    --bs-ink: #143044;
    --bs-muted: #607486;
    color: var(--bs-ink);
    font-family: "Avenir Next", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.65;
    background: var(--bs-paper);
}

.brightsteps-page h1,
.brightsteps-page h2,
.brightsteps-page h3 {
    letter-spacing: -0.025em;
}

.bs-site-header {
    position: sticky;
    top: 0;
    z-index: 70;
    color: var(--bs-ink);
    border-bottom: 1px solid rgba(16, 52, 74, 0.12);
    background: rgba(255, 253, 250, 0.96);
    backdrop-filter: blur(16px);
}

.bs-topline {
    color: white;
    background: var(--bs-navy-deep);
    font-size: 0.78rem;
    letter-spacing: 0.04em;
}

.bs-topline-inner {
    min-height: 34px;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 18px;
}

.bs-topline a {
    color: var(--bs-gold);
    font-weight: 700;
}

.bs-nav-shell {
    min-height: 82px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 26px;
}

.bs-brand {
    display: flex;
    flex-direction: column;
    line-height: 1.05;
}

.bs-brand strong {
    color: var(--bs-navy);
    font-size: 1.9rem;
    letter-spacing: -0.055em;
}

.bs-brand span {
    margin-top: 5px;
    color: var(--bs-muted);
    font-size: 0.68rem;
    font-weight: 800;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.bs-brand b {
    color: var(--bs-coral);
}

.bs-site-nav {
    display: flex;
    align-items: center;
    gap: 24px;
    font-size: 0.88rem;
    font-weight: 700;
}

.bs-site-nav > a:not(.bs-nav-cta):hover {
    color: var(--bs-teal);
}

.bs-nav-cta {
    padding: 11px 17px;
    color: white;
    border-radius: 999px;
    background: var(--bs-navy);
}

.bs-nav-cta:hover {
    color: white;
    background: var(--bs-teal);
}

.bs-hero {
    position: relative;
    min-height: 720px;
    overflow: hidden;
    color: white;
    background:
        radial-gradient(circle at 78% 28%, rgba(19, 170, 163, 0.2), transparent 30%),
        linear-gradient(135deg, var(--bs-navy-deep), var(--bs-navy) 62%, #174a63);
}

.bs-hero,
.bs-cycle-section,
.bs-book-section,
.bs-platform-section,
.bs-teacher-section {
    scroll-margin-top: 118px;
}

.bs-orbit {
    position: absolute;
    border: 1px solid rgba(255, 255, 255, 0.11);
    border-radius: 50%;
}

.bs-orbit-one {
    top: -280px;
    right: -150px;
    width: 760px;
    height: 760px;
    box-shadow: 0 0 0 80px rgba(255, 255, 255, 0.018), 0 0 0 160px rgba(255, 255, 255, 0.012);
}

.bs-orbit-two {
    bottom: -340px;
    left: -280px;
    width: 640px;
    height: 640px;
}

.bs-hero-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 0.92fr) minmax(470px, 1.08fr);
    gap: 34px;
    align-items: center;
    min-height: 720px;
    padding-top: 56px;
    padding-bottom: 56px;
}

.bs-hero-copy {
    position: relative;
    z-index: 2;
    padding: 44px 0;
}

.bs-kicker {
    margin-bottom: 16px;
    color: var(--bs-gold);
    font-size: 0.76rem;
    font-weight: 900;
    letter-spacing: 0.17em;
    text-transform: uppercase;
}

.bs-kicker-dark {
    color: var(--bs-coral);
}

.bs-hero h1 {
    max-width: 690px;
    font-size: clamp(3.25rem, 5.4vw, 5.7rem);
    line-height: 0.98;
}

.bs-hero h1 em {
    color: var(--bs-gold);
    font-style: normal;
}

.bs-hero-lead {
    max-width: 640px;
    margin: 26px 0 0;
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.24rem;
}

.bs-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 32px;
}

.bs-button {
    display: inline-flex;
    min-height: 50px;
    align-items: center;
    justify-content: center;
    padding: 12px 20px;
    border: 1px solid transparent;
    border-radius: 999px;
    font-size: 0.9rem;
    font-weight: 800;
    transition: transform 160ms ease, background 160ms ease, color 160ms ease;
}

.bs-button:hover {
    transform: translateY(-2px);
}

.bs-button-primary {
    color: var(--bs-navy-deep);
    background: var(--bs-gold);
}

.bs-button-primary:hover {
    color: var(--bs-navy-deep);
}

.bs-button-outline {
    color: white;
    border-color: rgba(255, 255, 255, 0.42);
    background: rgba(255, 255, 255, 0.04);
}

.bs-button-outline:hover {
    color: white;
    border-color: white;
}

.bs-button-light {
    color: var(--bs-navy-deep);
    background: white;
}

.bs-button-light:hover {
    color: var(--bs-navy-deep);
}

.bs-hero-note {
    margin-top: 18px;
    color: rgba(255, 255, 255, 0.55);
    font-size: 0.86rem;
}

.bs-product-stage {
    position: relative;
    min-height: 610px;
    perspective: 1400px;
}

.bs-stage-grid {
    position: absolute;
    inset: 60px 0 20px 40px;
    opacity: 0.18;
    background-image: linear-gradient(rgba(255, 255, 255, 0.14) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.14) 1px, transparent 1px);
    background-size: 34px 34px;
    -webkit-mask-image: linear-gradient(90deg, transparent, black 28%, black 80%, transparent);
    mask-image: linear-gradient(90deg, transparent, black 28%, black 80%, transparent);
}

.bs-product-cover,
.bs-product-page {
    position: absolute;
    height: auto;
    border-radius: 4px 9px 9px 4px;
    box-shadow: -18px 30px 65px rgba(0, 0, 0, 0.42);
}

.bs-product-cover {
    z-index: 3;
    right: 7%;
    bottom: -24px;
    width: 340px;
    transform: rotateY(-7deg) rotateZ(1deg);
}

.bs-product-page-middle {
    z-index: 2;
    top: 35px;
    left: 5%;
    width: 260px;
    transform: rotateY(9deg) rotateZ(-7deg);
}

.bs-product-page-back {
    z-index: 1;
    top: 4px;
    right: 0;
    width: 225px;
    opacity: 0.9;
    transform: rotateY(-10deg) rotateZ(8deg);
}

.bs-product-stamp {
    position: absolute;
    z-index: 5;
    right: 0;
    bottom: 58px;
    padding: 12px 16px;
    color: var(--bs-navy-deep);
    border-radius: 10px;
    background: var(--bs-gold);
    box-shadow: 0 16px 30px rgba(0, 0, 0, 0.22);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    transform: rotate(-4deg);
}

.bs-product-stamp strong {
    font-size: 1rem;
}

.bs-facts {
    position: relative;
    z-index: 4;
    color: var(--bs-ink);
    border-bottom: 1px solid rgba(16, 52, 74, 0.1);
    background: white;
}

.bs-fact-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
}

.bs-fact-grid article {
    display: flex;
    min-height: 128px;
    align-items: center;
    justify-content: center;
    gap: 12px;
    border-right: 1px solid rgba(16, 52, 74, 0.1);
}

.bs-fact-grid article:last-child {
    border-right: 0;
}

.bs-fact-grid strong {
    color: var(--bs-coral);
    font-size: 2.8rem;
    line-height: 1;
    white-space: nowrap;
}

.bs-fact-grid span {
    max-width: 110px;
    color: var(--bs-muted);
    font-size: 0.84rem;
    font-weight: 700;
    line-height: 1.25;
}

.bs-section {
    padding: 104px 0;
}

.bs-intro {
    background: var(--bs-cream);
}

.bs-intro-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 92px;
}

.brightsteps-page .bs-section h2 {
    font-size: clamp(2.55rem, 4vw, 4.3rem);
    line-height: 1.05;
}

.bs-intro-copy {
    padding-top: 36px;
    color: var(--bs-muted);
    font-size: 1.2rem;
}

.bs-intro-copy p:last-child {
    margin-bottom: 0;
}

.bs-cycle-section {
    color: white;
    background: var(--bs-navy-deep);
}

.bs-section-heading {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(320px, 0.55fr);
    gap: 64px;
    align-items: end;
    margin-bottom: 54px;
}

.bs-section-heading > p {
    margin-bottom: 5px;
    color: rgba(255, 255, 255, 0.65);
    font-size: 1.02rem;
}

.bs-heading-dark > p {
    color: var(--bs-muted);
}

.bs-cycle-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
}

.bs-cycle-card {
    position: relative;
    min-height: 330px;
    overflow: hidden;
    padding: 28px;
    color: var(--bs-navy-deep);
    border-radius: 18px;
}

.bs-cycle-card::after {
    content: "";
    position: absolute;
    right: -42px;
    bottom: -58px;
    width: 170px;
    height: 170px;
    border: 1px solid currentColor;
    border-radius: 50%;
    opacity: 0.13;
    box-shadow: 0 0 0 26px currentColor, 0 0 0 54px currentColor;
}

.bs-cycle-card > span {
    display: inline-grid;
    width: 48px;
    height: 48px;
    place-items: center;
    margin-bottom: 44px;
    border: 1px solid currentColor;
    border-radius: 50%;
    font-weight: 900;
}

.bs-cycle-card > p:first-of-type {
    margin-bottom: 7px;
    font-size: 0.72rem;
    font-weight: 900;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.bs-cycle-card h3 {
    margin-bottom: 12px;
    font-size: 1.65rem;
}

.bs-cycle-card > p:last-child {
    position: relative;
    z-index: 1;
    margin: 0;
    opacity: 0.78;
}

.bs-ask { background: #f9c1b8; }
.bs-find { background: #a9ded9; }
.bs-make { background: #f4d77e; }
.bs-improve { background: #a8d3b8; }

.bs-book-section {
    overflow: hidden;
    background: var(--bs-paper);
}

.bs-book-grid {
    display: grid;
    grid-template-columns: minmax(440px, 0.9fr) minmax(0, 1.1fr);
    gap: 96px;
    align-items: center;
}

.bs-book-visual {
    position: relative;
    min-height: 630px;
}

.bs-book-visual::after {
    content: "INTERIOR PREVIEW";
    position: absolute;
    z-index: 4;
    left: 50%;
    top: 51%;
    padding: 10px 15px;
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: 999px;
    background: rgba(9, 38, 56, 0.84);
    box-shadow: 0 10px 26px rgba(9, 38, 56, 0.22);
    font-size: 0.67rem;
    font-weight: 900;
    letter-spacing: 0.14em;
    transform: translate(-50%, -50%) rotate(-2deg);
}

.bs-book-glow {
    position: absolute;
    inset: 90px 20px 50px 10px;
    border-radius: 50%;
    background: rgba(19, 170, 163, 0.14);
    filter: blur(18px);
}

.bs-book-sheet {
    position: absolute;
    width: 330px;
    height: auto;
    border-radius: 4px 8px 8px 4px;
    box-shadow: 0 32px 70px rgba(16, 52, 74, 0.25);
}

.bs-book-sheet-one {
    z-index: 2;
    left: 20px;
    bottom: 0;
    transform: rotate(-7deg);
}

.bs-book-sheet-two {
    z-index: 1;
    top: 0;
    right: 0;
    transform: rotate(8deg);
}

.bs-book-copy > p:not(.bs-kicker) {
    margin: 26px 0;
    color: var(--bs-muted);
    font-size: 1.08rem;
}

.bs-check-list {
    display: grid;
    gap: 14px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.bs-check-list li {
    position: relative;
    padding-left: 34px;
    font-weight: 700;
}

.bs-check-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 0;
    display: grid;
    width: 22px;
    height: 22px;
    place-items: center;
    color: white;
    border-radius: 50%;
    background: var(--bs-teal);
    font-size: 0.72rem;
}

.bs-paths-section {
    background: #edf4f2;
}

.bs-platform-section {
    position: relative;
    overflow: hidden;
    background: #edf5f3;
}

.bs-platform-section::before {
    content: "";
    position: absolute;
    top: -360px;
    right: -240px;
    width: 720px;
    height: 720px;
    border: 1px solid rgba(16, 52, 74, 0.08);
    border-radius: 50%;
    box-shadow: 0 0 0 72px rgba(16, 52, 74, 0.018), 0 0 0 144px rgba(16, 52, 74, 0.012);
}

.bs-platform-section .container {
    position: relative;
}

.bs-platform-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.bs-platform-card {
    position: relative;
    min-height: 460px;
    overflow: hidden;
    padding: 30px;
    border: 1px solid rgba(16, 52, 74, 0.1);
    border-radius: 18px;
    background: white;
    box-shadow: 0 24px 50px rgba(16, 52, 74, 0.08);
}

.bs-platform-card::after {
    content: "";
    position: absolute;
    right: -72px;
    bottom: -80px;
    width: 190px;
    height: 190px;
    border: 1px solid currentColor;
    border-radius: 50%;
    opacity: 0.08;
    box-shadow: 0 0 0 28px currentColor, 0 0 0 56px currentColor;
}

.bs-platform-student { color: #107e78; }
.bs-platform-teacher { color: #d85849; }
.bs-platform-present { color: #5b4b9a; }

.bs-platform-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.bs-platform-meta span {
    display: grid;
    width: 44px;
    height: 44px;
    place-items: center;
    border: 1px solid currentColor;
    border-radius: 50%;
    font-size: 0.76rem;
    font-weight: 900;
}

.bs-platform-meta strong {
    font-size: 0.7rem;
    letter-spacing: 0.11em;
    text-align: right;
    text-transform: uppercase;
}

.bs-platform-card h3 {
    margin: 64px 0 16px;
    color: var(--bs-navy);
    font-size: 1.7rem;
    line-height: 1.12;
}

.bs-platform-card > p {
    margin: 0 0 24px;
    color: var(--bs-muted);
    font-size: 0.92rem;
}

.bs-platform-card ul {
    position: relative;
    z-index: 1;
    display: grid;
    gap: 9px;
    margin: 0;
    padding: 0;
    color: var(--bs-ink);
    font-size: 0.84rem;
    font-weight: 800;
    list-style: none;
}

.bs-platform-card li {
    padding-left: 18px;
}

.bs-platform-card li::before {
    content: "";
    position: absolute;
    width: 7px;
    height: 7px;
    margin: 10px 0 0 -18px;
    border-radius: 50%;
    background: currentColor;
}

.bs-platform-note {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 34px;
    margin-top: 18px;
    padding: 22px 26px;
    color: white;
    border-radius: 14px;
    background: var(--bs-navy);
}

.bs-platform-note strong {
    flex: 0 0 auto;
    color: var(--bs-gold);
}

.bs-platform-note span {
    color: rgba(255, 255, 255, 0.72);
    font-size: 0.9rem;
}

.bs-scope-section {
    background: var(--bs-paper);
}

.bs-scope-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: 14px;
}

.bs-scope-grid article {
    min-height: 250px;
    padding: 25px;
    border: 1px solid rgba(16, 52, 74, 0.1);
    border-radius: 16px;
    background: white;
}

.bs-scope-grid span {
    color: var(--bs-coral);
    font-size: 0.7rem;
    font-weight: 900;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.bs-scope-grid h3 {
    margin: 64px 0 12px;
    font-size: 1.35rem;
}

.bs-scope-grid p {
    margin: 0;
    color: var(--bs-muted);
    font-size: 0.88rem;
}

.bs-path-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.bs-path-grid article {
    min-height: 300px;
    padding: 30px;
    border: 1px solid rgba(16, 52, 74, 0.1);
    border-radius: 18px;
    background: white;
}

.bs-path-chip {
    display: inline-flex;
    padding: 7px 11px;
    border-radius: 999px;
    font-size: 0.7rem;
    font-weight: 900;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.bs-supported { color: #a74135; background: #fae1dc; }
.bs-core { color: #086d69; background: #d7f1ee; }
.bs-extension { color: #6251a6; background: #e8e3f8; }

.bs-path-grid h3 {
    margin: 54px 0 14px;
    font-size: 1.6rem;
}

.bs-path-grid p {
    margin: 0;
    color: var(--bs-muted);
}

.bs-teacher-section {
    position: relative;
    overflow: hidden;
    color: white;
    background: var(--bs-navy);
}

.bs-teacher-section::before {
    content: "";
    position: absolute;
    top: -260px;
    right: -140px;
    width: 640px;
    height: 640px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    box-shadow: 0 0 0 70px rgba(255, 255, 255, 0.018), 0 0 0 140px rgba(255, 255, 255, 0.012);
}

.bs-teacher-heading {
    position: relative;
    max-width: 890px;
    margin-bottom: 56px;
}

.bs-teacher-heading > p:last-child {
    max-width: 720px;
    margin-top: 24px;
    color: rgba(255, 255, 255, 0.68);
    font-size: 1.08rem;
}

.bs-teacher-grid {
    position: relative;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
}

.bs-teacher-grid article {
    min-height: 280px;
    padding: 26px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.045);
}

.bs-teacher-grid span {
    color: var(--bs-gold);
    font-size: 0.75rem;
    font-weight: 900;
    letter-spacing: 0.12em;
}

.bs-teacher-grid h3 {
    margin: 66px 0 12px;
    font-size: 1.4rem;
}

.bs-teacher-grid p {
    margin: 0;
    color: rgba(255, 255, 255, 0.64);
    font-size: 0.9rem;
}

.bs-school-value {
    background: var(--bs-cream);
}

.bs-school-value-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    gap: 84px;
}

.bs-value-stack {
    display: grid;
    gap: 12px;
}

.bs-value-stack article {
    display: grid;
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 24px;
    padding: 22px 0;
    border-bottom: 1px solid rgba(16, 52, 74, 0.14);
}

.bs-value-stack article:first-child {
    padding-top: 0;
}

.bs-value-stack strong {
    color: var(--bs-navy);
}

.bs-value-stack span {
    color: var(--bs-muted);
}

.bs-final-cta {
    position: relative;
    overflow: hidden;
    padding: 98px 0;
    color: white;
    background: var(--bs-coral);
}

.bs-final-shape {
    position: absolute;
    top: -210px;
    right: -120px;
    width: 560px;
    height: 560px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    box-shadow: 0 0 0 64px rgba(255, 255, 255, 0.06), 0 0 0 128px rgba(255, 255, 255, 0.035);
}

.bs-final-grid {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 50px;
    align-items: center;
}

.bs-final-grid > div {
    max-width: 820px;
}

.bs-final-grid .bs-kicker {
    color: var(--bs-navy-deep);
}

.bs-final-grid h2 {
    font-size: clamp(2.7rem, 4vw, 4.4rem);
    line-height: 1.02;
}

.bs-final-grid p:last-child {
    max-width: 720px;
    margin-top: 22px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.05rem;
}

.bs-footer {
    padding: 70px 0 24px;
    color: white;
    background: #071d2b;
}

.bs-footer-grid {
    display: grid;
    grid-template-columns: 1.7fr 0.65fr 0.85fr;
    gap: 58px;
    padding-bottom: 48px;
}

.bs-footer-brand {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.bs-footer-brand strong {
    font-size: 2.2rem;
    letter-spacing: -0.055em;
}

.bs-footer-brand span {
    color: var(--bs-gold);
    font-size: 0.74rem;
    font-weight: 800;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.bs-footer-brand p {
    margin-top: 22px;
    color: rgba(255, 255, 255, 0.55);
}

.bs-footer h2 {
    margin-bottom: 18px;
    font-size: 0.78rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.bs-footer p {
    margin-bottom: 8px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.86rem;
}

.bs-footer a:hover {
    color: var(--bs-gold);
}

.bs-footer-bottom {
    display: flex;
    justify-content: space-between;
    padding-top: 22px;
    color: rgba(255, 255, 255, 0.38);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.74rem;
}

@media (max-width: 1180px) and (min-width: 861px) {
    .site-nav {
        gap: 10px;
        font-size: 0.88rem;
    }

    .brand {
        min-width: 210px;
    }

    .bs-site-nav {
        gap: 14px;
    }
}

@media (max-width: 1040px) {
    h1 {
        font-size: 3rem;
    }

    h2 {
        font-size: 2rem;
    }

    .card-grid,
    .card-grid.three,
    .post-grid,
    .gallery-grid,
    .ability-grid,
    .four-grid,
    .value-grid,
    .testimonial-grid,
    .footer-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .two-column,
    .content-grid,
    .split-showcase,
    .split-showcase.reverse,
    .contact-layout,
    .course-detail-layout,
    .article-layout {
        grid-template-columns: 1fr;
    }

    .learning-path {
        grid-template-columns: 1fr;
    }

    .course-sidebar {
        position: static;
    }

    .home-publisher-feature-inner {
        grid-template-columns: minmax(0, 1fr) minmax(390px, 0.86fr);
        gap: 38px;
    }

    .home-publisher-copy {
        padding: 68px 0;
    }

    .home-publisher-visual,
    .home-publisher-feature-inner {
        min-height: 580px;
    }

    .home-publisher-page {
        width: 220px;
    }

    .home-publisher-book {
        right: 0;
        width: 310px;
    }

    .bs-hero-grid {
        grid-template-columns: 1fr;
        padding-top: 44px;
    }

    .bs-hero-copy {
        max-width: 760px;
        padding-bottom: 0;
    }

    .bs-product-stage {
        min-height: 590px;
    }

    .bs-product-cover {
        right: 18%;
    }

    .bs-product-page-middle {
        left: 16%;
    }

    .bs-product-page-back {
        right: 10%;
    }

    .bs-intro-grid,
    .bs-book-grid,
    .bs-school-value-grid {
        grid-template-columns: 1fr;
        gap: 54px;
    }

    .bs-intro-copy {
        max-width: 760px;
        padding-top: 0;
    }

    .bs-book-grid {
        max-width: 820px;
    }

    .bs-book-visual {
        max-width: 620px;
    }

    .bs-cycle-grid,
    .bs-teacher-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

}

@media (max-width: 860px) {
    .topbar-inner {
        justify-content: flex-start;
        overflow-x: auto;
    }

    .nav-toggle {
        display: inline-flex;
    }

    .site-nav {
        position: absolute;
        left: 16px;
        right: 16px;
        top: calc(100% - 1px);
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 12px;
        border: 1px solid var(--line);
        border-radius: var(--radius);
        background: white;
        box-shadow: var(--shadow);
    }

    .site-nav.open {
        display: flex;
    }

    .site-nav a {
        padding: 12px;
    }

    .site-nav .nav-cta {
        text-align: center;
    }

    .hero {
        min-height: 720px;
    }

    .hero-overlay,
    .course-hero-overlay {
        background: rgba(14, 20, 28, 0.72);
    }

    .section-heading,
    .cta-band .container {
        display: block;
    }

    .section-heading .text-link,
    .cta-band .button {
        margin-top: 18px;
    }

    .form-grid,
    .course-search,
    .gallery-grid.large {
        grid-template-columns: 1fr;
    }

    .home-publisher-feature-inner {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .home-publisher-copy {
        padding: 68px 0 8px;
    }

    .home-publisher-visual {
        min-height: 540px;
    }

    .home-publisher-book {
        right: 12%;
        width: 320px;
    }

    .home-publisher-page {
        left: 12%;
        width: 220px;
    }

    .contact-choice-grid {
        grid-template-columns: 1fr;
    }

    .bs-topline-inner {
        justify-content: flex-start;
        overflow-x: auto;
    }

    .bs-nav-toggle {
        display: inline-flex;
    }

    .bs-site-nav {
        position: absolute;
        top: calc(100% - 1px);
        left: 16px;
        right: 16px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 12px;
        color: var(--bs-ink);
        border: 1px solid rgba(16, 52, 74, 0.12);
        border-radius: 14px;
        background: white;
        box-shadow: 0 24px 50px rgba(16, 52, 74, 0.18);
    }

    .bs-site-nav.open {
        display: flex;
    }

    .bs-site-nav a {
        padding: 12px;
    }

    .bs-nav-cta {
        text-align: center;
    }

    .bs-fact-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .bs-fact-grid article:nth-child(2) {
        border-right: 0;
    }

    .bs-fact-grid article:nth-child(-n + 2) {
        border-bottom: 1px solid rgba(16, 52, 74, 0.1);
    }

    .bs-section-heading {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .bs-cycle-grid,
    .bs-path-grid {
        grid-template-columns: 1fr;
    }

    .bs-platform-grid {
        grid-template-columns: 1fr;
    }

    .bs-platform-card {
        min-height: 0;
    }

    .bs-platform-card h3 {
        margin-top: 40px;
    }

    .bs-cycle-card {
        min-height: 270px;
    }

    .bs-cycle-card > span {
        margin-bottom: 28px;
    }

    .bs-path-grid article {
        min-height: 240px;
    }

    .bs-path-grid h3 {
        margin-top: 38px;
    }

    .bs-final-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .bs-final-grid .bs-button {
        justify-self: start;
    }

    .bs-footer-grid {
        grid-template-columns: 1.4fr 0.8fr 1fr;
        gap: 30px;
    }
}

@media (max-width: 640px) {
    body {
        font-size: 15px;
    }

    h1,
    .page-hero h1,
    .course-hero h1 {
        font-size: 2.3rem;
    }

    h2 {
        font-size: 1.72rem;
    }

    .brand {
        min-width: auto;
    }

    .brand-logo {
        width: 96px;
        height: 44px;
    }

    .brand small {
        display: none;
    }

    .hero-content {
        padding: 70px 0 58px;
    }

    .hero-lead {
        font-size: 1.05rem;
    }

    .section {
        padding: 56px 0;
    }

    .card-grid,
    .card-grid.three,
    .post-grid,
    .gallery-grid,
    .ability-grid,
    .four-grid,
    .value-grid,
    .testimonial-grid,
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .learning-path li {
        grid-template-columns: 1fr;
    }

    .stem-bar {
        grid-template-columns: 1fr;
        gap: 6px;
    }

    dd {
        text-align: left;
    }

    .home-publisher-feature-inner {
        min-height: auto;
    }

    .home-publisher-copy {
        padding: 56px 0 4px;
    }

    .home-publisher-copy h2 {
        font-size: 2.15rem;
    }

    .publisher-points {
        align-items: flex-start;
        gap: 8px;
    }

    .publisher-points span {
        padding: 6px 10px;
        font-size: 0.8rem;
    }

    .home-publisher-visual {
        min-height: 420px;
    }

    .home-publisher-page {
        top: 66px;
        left: 0;
        width: 155px;
    }

    .home-publisher-book {
        right: 5%;
        bottom: -34px;
        width: 230px;
    }

    .home-publisher-label {
        right: 0;
        bottom: 34px;
        font-size: 0.58rem;
    }

    .contact-choice-grid article {
        padding: 18px;
    }

    .contact-form,
    .contact-aside {
        padding: 20px;
    }

    .licensing-aside-card {
        margin: -20px -20px 24px;
        padding: 22px 20px;
    }

    .bs-topline-inner span {
        display: none;
    }

    .bs-nav-shell {
        min-height: 72px;
    }

    .bs-brand strong {
        font-size: 1.6rem;
    }

    .bs-brand span {
        font-size: 0.59rem;
    }

    .bs-hero-grid {
        min-height: auto;
        padding-top: 30px;
        padding-bottom: 30px;
    }

    .bs-hero h1 {
        font-size: 3rem;
    }

    .bs-hero-lead {
        font-size: 1.04rem;
    }

    .bs-actions {
        align-items: stretch;
        flex-direction: column;
    }

    .bs-product-stage {
        min-height: 455px;
    }

    .bs-product-cover {
        right: 7%;
        width: 225px;
    }

    .bs-product-page-middle {
        top: 45px;
        left: 0;
        width: 170px;
    }

    .bs-product-page-back {
        width: 145px;
    }

    .bs-product-stamp {
        right: 0;
        bottom: 44px;
        font-size: 0.58rem;
    }

    .bs-fact-grid article {
        min-height: 105px;
        flex-direction: column;
        gap: 6px;
        text-align: center;
    }

    .bs-fact-grid strong {
        font-size: 2rem;
    }

    .bs-fact-grid span {
        max-width: 140px;
    }

    .bs-section {
        padding: 72px 0;
    }

    .brightsteps-page .bs-section h2 {
        font-size: 2.45rem;
    }

    .bs-intro-grid,
    .bs-book-grid,
    .bs-school-value-grid {
        gap: 38px;
    }

    .bs-book-visual {
        min-height: 465px;
    }

    .bs-book-sheet {
        width: 230px;
    }

    .bs-book-sheet-one {
        left: 0;
    }

    .bs-platform-card {
        padding: 24px;
    }

    .bs-platform-card h3 {
        font-size: 1.5rem;
    }

    .bs-platform-note {
        align-items: flex-start;
        flex-direction: column;
        gap: 8px;
        padding: 20px;
    }

    .bs-teacher-grid {
        grid-template-columns: 1fr;
    }

    .bs-teacher-grid article {
        min-height: 230px;
    }

    .bs-teacher-grid h3 {
        margin-top: 46px;
    }

    .bs-value-stack article {
        grid-template-columns: 1fr;
        gap: 7px;
    }

    .bs-final-cta {
        padding: 76px 0;
    }

    .bs-final-grid h2 {
        font-size: 2.6rem;
    }

    .bs-footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .bs-footer-bottom {
        align-items: flex-start;
        flex-direction: column;
        gap: 8px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition: none !important;
    }
}