@import "variables.css";

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', Arial, sans-serif;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-page);
}

a {
    color: inherit;
}

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

/* ── Focus visible (accessibility) ────────────────────────── */
:focus-visible {
    outline: 3px solid var(--color-main);
    outline-offset: 3px;
    border-radius: 4px;
}

/* ── Header & Nav ──────────────────────────────────────────── */
.main-header {
    background: linear-gradient(135deg, #ffffff 0%, #f4fbf6 58%, var(--color-main-soft) 100%);
    border-bottom: 1px solid var(--color-border);
    padding: 0.6rem 2rem;
    position: sticky;
    top: 0;
    z-index: 20;
    box-shadow: 0 8px 22px rgba(5, 5, 5, 0.06);
}

.main-header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    gap: 1.5rem;
}

.logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.brand-logo {
    display: inline-flex;
    align-items: center;
    width: 52px;
    height: 52px;
    text-decoration: none;
}

.brand-logo img {
    width: 52px;
    height: 52px;
    object-fit: contain;
}

.nav-links {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 1.35rem;
}

.nav-links a {
    position: relative;
    text-decoration: none;
    color: #27332c;
    font-size: 0.95rem;
    font-weight: 700;
    transition: color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-main);
}

.nav-links a::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -0.45rem;
    height: 3px;
    background: var(--color-main);
    border-radius: 3px;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.2s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    transform: scaleX(1);
}

/* ── Hamburger toggle (hidden on desktop) ──────────────────── */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: 6px;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    cursor: pointer;
    min-height: unset;
    box-shadow: none;
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-ink);
    border-radius: 2px;
    transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ── Products dropdown ─────────────────────────────────────── */
.nav-dropdown {
    position: relative;
}

.nav-dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    background: none;
    border: none;
    padding: 0;
    color: #27332c;
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    font-family: inherit;
    box-shadow: none;
    min-height: unset;
    border-radius: 0;
    transition: color 0.2s ease;
}

.nav-dropdown-toggle:hover {
    color: var(--color-main);
}

.nav-chevron {
    transition: transform 0.2s ease;
    flex-shrink: 0;
}

.nav-dropdown.open .nav-chevron {
    transform: rotate(180deg);
}

.nav-dropdown-menu {
    display: none;
    position: absolute;
    top: calc(100% + 0.75rem);
    left: 50%;
    transform: translateX(-50%);
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: 10px;
    box-shadow: 0 8px 28px rgba(0,0,0,0.1);
    list-style: none;
    padding: 0.4rem;
    min-width: 210px;
    z-index: 100;
}

.nav-dropdown.open .nav-dropdown-menu {
    display: block;
}

.nav-dropdown-menu li a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 0.75rem;
    border-radius: 7px;
    text-decoration: none;
    color: var(--color-ink);
    transition: background 0.15s ease;
    white-space: nowrap;
}

.nav-dropdown-menu li a::after {
    display: none;
}

.nav-dropdown-menu li a:hover {
    background: #f4faf6;
    color: var(--color-main);
}

.nav-dropdown-menu li a strong {
    display: block;
    font-size: 0.9rem;
    font-weight: 700;
    color: inherit;
}

.nav-dropdown-menu li a small {
    display: block;
    font-size: 0.78rem;
    color: #888;
    font-weight: 400;
}

.nav-dropdown-menu li a:hover small {
    color: #5a9a70;
}

.dropdown-item-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 8px;
    background: var(--color-main-soft);
    color: var(--color-main);
    flex-shrink: 0;
    transition: background 0.15s ease, color 0.15s ease;
}

.nav-dropdown-menu li a:hover .dropdown-item-icon {
    background: var(--color-main);
    color: #fff;
}

/* ── Main content ──────────────────────────────────────────── */
main {
    min-height: calc(100vh - 220px);
}

/* ── Hero Slider ───────────────────────────────────────────── */
.hero-slider {
    position: relative;
    min-height: 660px;
    overflow: hidden;
    background: var(--color-ink);
}

.hero-slide {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    padding: 5rem max(2rem, calc((100vw - 1200px) / 2));
    background-position: center;
    background-size: cover;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.6s ease;
}

.hero-slide::before,
.page-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(5, 5, 5, 0.9), rgba(5, 5, 5, 0.58), rgba(12, 155, 62, 0.2));
}

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

.hero-copy {
    position: relative;
    z-index: 1;
    max-width: 720px;
    color: #fff;
}

.eyebrow {
    color: var(--color-main);
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-bottom: 0.7rem;
}

.hero-copy .eyebrow,
.page-hero .eyebrow {
    color: #b7f7cb;
}

.hero-copy h1,
.page-hero h1 {
    font-size: clamp(2.3rem, 5vw, 4.8rem);
    line-height: 1.03;
    max-width: 940px;
    margin-bottom: 1rem;
}

.hero-copy p,
.page-hero p {
    max-width: 690px;
    color: #eef7f1;
    font-size: 1.15rem;
}

.hero-actions {
    display: flex;
    gap: 0.9rem;
    flex-wrap: wrap;
    margin-top: 1.8rem;
}

/* ── Buttons ───────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0.78rem 1.4rem;
    border: 0;
    border-radius: 8px;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 700;
    text-decoration: none;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.btn.primary {
    background: var(--color-main);
    color: #fff;
}

.btn.primary:hover {
    background: var(--color-main-dark);
}

.btn.secondary {
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.65);
    color: #fff;
}

.btn.secondary:hover {
    background: #fff;
    color: var(--color-ink);
}

/* ── Form submit button (scoped, doesn't affect slider buttons) */
.contact-form button[type="submit"] {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0.78rem 1.4rem;
    border: 0;
    border-radius: 8px;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 700;
    background: var(--color-main);
    color: #fff;
    transition: background-color 0.2s ease;
}

.contact-form button[type="submit"]:hover {
    background: var(--color-main-dark);
}

/* ── Slider controls ───────────────────────────────────────── */
.slider-controls {
    position: absolute;
    z-index: 2;
    left: 50%;
    bottom: 2rem;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 0.7rem;
}

.slider-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    padding: 0;
    background: rgba(255, 255, 255, 0.14);
    border: 1px solid rgba(255, 255, 255, 0.45);
    border-radius: 50%;
    cursor: pointer;
    color: #fff;
    transition: background 0.2s ease;
}

.slider-btn:hover {
    background: rgba(255, 255, 255, 0.28);
}

.slider-btn svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.slider-dot {
    width: 13px;
    height: 13px;
    padding: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.52);
    border: 1px solid #fff;
    cursor: pointer;
    transition: background 0.2s ease;
}

.slider-dot.active {
    background: #b7f7cb;
}

/* ── Section layout containers ─────────────────────────────── */
.intro-band,
.features,
.split-section,
.program-strip,
.blog-preview,
.products-section,
.cta-band,
.service-intro,
.service-grid,
.course-grid,
.portfolio-grid,
.blog-list,
.contact-container {
    width: min(1200px, calc(100% - 4rem));
    margin: 0 auto;
}

/* ── Intro band ────────────────────────────────────────────── */
.intro-band {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    padding: 4.5rem 0 2rem;
    align-items: start;
}

.intro-band h2,
.section-heading h2,
.split-copy h2,
.cta-band h2 {
    font-size: clamp(2rem, 4vw, 3.2rem);
    line-height: 1.12;
    color: var(--color-ink);
}

.intro-band > p,
.split-copy p {
    color: var(--color-muted);
    font-size: 1.08rem;
}

/* ── Service intro strip ───────────────────────────────────── */
.service-intro {
    padding: 3.5rem 0 0.5rem;
    max-width: 760px;
}

.service-intro p {
    color: var(--color-muted);
    font-size: 1.08rem;
    margin-top: 0.75rem;
}

/* ── Feature / card grids ──────────────────────────────────── */
.features,
.service-grid,
.course-grid,
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
    padding: 2.5rem 0;
}

.feature,
.service-card,
.course-card,
.portfolio-item,
.blog-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 18px rgba(5, 5, 5, 0.06);
    transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.feature:hover,
.service-card:hover,
.course-card:hover,
.portfolio-item:hover {
    box-shadow: 0 8px 28px rgba(5, 5, 5, 0.12);
    transform: translateY(-2px);
}

.feature,
.service-card,
.course-card {
    padding: 1.6rem;
    border-top: 4px solid var(--color-main);
}

.feature span {
    display: inline-flex;
    width: 38px;
    height: 38px;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: var(--color-main-soft);
    color: var(--color-main);
    font-weight: 800;
    margin-bottom: 1rem;
}

.feature h2,
.service-card h2,
.course-card h2,
.portfolio-item h3,
.blog-card h2,
.blog-card h3 {
    color: var(--color-ink);
    line-height: 1.18;
    margin-bottom: 0.75rem;
}

.feature p,
.service-card p,
.course-card p,
.portfolio-item p,
.blog-card p,
.contact-info p {
    color: var(--color-muted);
}

/* ── Split section ─────────────────────────────────────────── */
.split-section {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 3rem;
    align-items: center;
    padding: 4rem 0;
}

.split-section img {
    width: 100%;
    height: 430px;
    object-fit: cover;
    border-radius: 10px;
}

.text-link,
.blog-card a {
    display: inline-flex;
    margin-top: 1rem;
    color: var(--color-main);
    font-weight: 700;
    text-decoration: none;
}

.text-link:hover,
.blog-card a:hover {
    text-decoration: underline;
}

/* ── Program strip ─────────────────────────────────────────── */
.program-strip {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    padding: 1rem 0 4rem;
}

.program-strip span {
    padding: 0.55rem 0.9rem;
    border-radius: 8px;
    background: #fff3d3;
    color: #5b4308;
    font-weight: 700;
    font-size: 0.9rem;
}

/* ── Blog preview ──────────────────────────────────────────── */
/* ── Products section (home page) ──────────────────────────── */
.products-section {
    padding: 3rem 0 4rem;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.product-card {
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
    padding: 1.5rem;
    border: 1.5px solid var(--color-border);
    border-radius: 14px;
    background: #fff;
    text-decoration: none;
    color: var(--color-ink);
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.product-card:hover {
    border-color: var(--color-main);
    box-shadow: 0 8px 28px rgba(12, 155, 62, 0.1);
    transform: translateY(-2px);
}

.product-card-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    border-radius: 12px;
    background: var(--color-main-soft);
    color: var(--color-main);
    flex-shrink: 0;
    transition: background 0.2s ease, color 0.2s ease;
}

.product-card:hover .product-card-icon {
    background: var(--color-main);
    color: #fff;
}

.product-card-body h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 0 0 0.4rem;
    color: var(--color-ink);
}

.product-card-body p {
    font-size: 0.9rem;
    color: var(--color-muted);
    margin: 0 0 0.75rem;
    line-height: 1.55;
}

.product-card-link {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--color-main);
}

/* ── Footer products list ──────────────────────────────────── */
.footer-products {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.footer-products li a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-products li a svg {
    flex-shrink: 0;
    opacity: 0.7;
}

.blog-preview {
    padding: 2rem 0 4rem;
}

.section-heading {
    max-width: 720px;
    margin-bottom: 1.5rem;
}

.blog-grid,
.blog-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.25rem;
}

.blog-list {
    grid-template-columns: 1fr;
    padding: 4rem 0;
}

.blog-card img,
.portfolio-item img {
    width: 100%;
    height: 230px;
    object-fit: cover;
}

.blog-card > div,
.portfolio-item h3,
.portfolio-item p {
    padding: 1.2rem;
}

.portfolio-item p {
    padding-top: 0;
}

.blog-card.large {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
}

.blog-card.large img {
    height: 100%;
    min-height: 270px;
}

.blog-card > div p:first-child {
    color: var(--color-main);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.8rem;
}

/* ── CTA band ──────────────────────────────────────────────── */
.cta-band {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
    margin-top: 1rem;
    margin-bottom: 4rem;
    padding: 2.2rem 2.5rem;
    background: var(--color-ink);
    color: #fff;
    border-radius: 12px;
}

.cta-band h2 {
    color: #fff;
    max-width: 760px;
}

/* ── Page hero ─────────────────────────────────────────────── */
.page-hero {
    position: relative;
    min-height: 380px;
    display: flex;
    align-items: center;
    padding: 5rem max(2rem, calc((100vw - 1200px) / 2));
    background-position: center;
    background-size: cover;
}

.page-hero > div {
    position: relative;
    z-index: 1;
    color: #fff;
}

.services-hero {
    background-image: url('https://images.unsplash.com/photo-1551434678-e076c223a692?auto=format&fit=crop&w=1600&q=80');
}

.education-hero {
    background-image: url('https://images.unsplash.com/photo-1513258496099-48168024aec0?auto=format&fit=crop&w=1600&q=80');
}

.blog-hero {
    background-image: url('https://images.unsplash.com/photo-1499750310107-5fef28a66643?auto=format&fit=crop&w=1600&q=80');
}

.contact-hero {
    background-image: url('https://images.unsplash.com/photo-1423666639041-f56000c27a9a?auto=format&fit=crop&w=1600&q=80');
}

.work-hero {
    background-image: url('https://images.unsplash.com/photo-1556761175-5973dc0f32e7?auto=format&fit=crop&w=1600&q=80');
}

/* ── Contact page ──────────────────────────────────────────── */
.contact-container {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 2rem;
    padding: 4rem 0;
}

.contact-info,
.contact-form {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    padding: 1.8rem;
}

.contact-info h2 {
    margin-bottom: 0.7rem;
}

.contact-info a {
    color: var(--color-main);
    text-decoration: none;
    font-weight: 500;
}

.contact-info a:hover {
    text-decoration: underline;
}

.info-item {
    margin-top: 1.4rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.success-text {
    font-size: 0.95rem;
    color: var(--color-main-dark);
    font-weight: 500;
}

.error-text {
    font-size: 0.95rem;
    color: #c0392b;
    font-weight: 500;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.form-group label {
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--color-ink);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 0.9rem;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font: inherit;
    font-size: 0.95rem;
    color: var(--color-text);
    background: var(--color-surface);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-main);
    box-shadow: 0 0 0 3px rgba(12, 155, 62, 0.15);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

/* ── Footer ────────────────────────────────────────────────── */
.main-footer {
    background: linear-gradient(135deg, var(--color-ink) 0%, #063f1b 55%, var(--color-main-dark) 100%);
    color: #fff;
    padding: 2rem 2rem 1rem;
    border-top: 3px solid var(--color-main);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    margin-bottom: 0.6rem;
}

.footer-brand img {
    width: 32px;
    height: 32px;
    object-fit: contain;
    background: #fff;
    border-radius: 6px;
}

.footer-section h3 {
    margin-bottom: 0.5rem;
    font-size: 0.97rem;
    line-height: 1.2;
}

.footer-section p {
    color: #e5f1e8;
    margin-bottom: 0.4rem;
    font-size: 0.9rem;
    line-height: 1.5;
}

.footer-section ul {
    list-style: none;
}

.footer-links-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 0.9rem;
    row-gap: 0.3rem;
}

.footer-section a {
    color: #fff;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s ease;
}

.footer-section a:hover {
    color: #b7f7cb;
}

.footer-social {
    display: flex;
    gap: 0.75rem;
    margin-top: 0.9rem;
    flex-wrap: wrap;
}

.footer-social a {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    color: #d0ead7;
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-social a:hover {
    color: #b7f7cb;
}

.footer-social svg {
    width: 16px;
    height: 16px;
    fill: currentColor;
    flex-shrink: 0;
}

.footer-bottom {
    text-align: center;
    max-width: 1200px;
    margin: 1rem auto 0;
    padding-top: 0.75rem;
    border-top: 1px solid rgba(255, 255, 255, 0.14);
    color: #c0d6c7;
    font-size: 0.85rem;
}

/* ── Catalog ───────────────────────────────────────────────── */
.catalog {
    width: min(1200px, calc(100% - 4rem));
    margin: 0 auto;
    padding: 4rem 0;
}

.catalog h1 {
    font-size: clamp(2rem, 4vw, 3.2rem);
    margin-bottom: 2rem;
}

.catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.25rem;
}

.catalog-item,
.catalog-content {
    background: var(--color-surface);
    border-radius: 8px;
}

.catalog-content {
    padding: 1.5rem;
    border: 1px solid var(--color-border);
}

.price {
    color: var(--color-main);
    font-size: 1.4rem;
    font-weight: 800;
}

/* ── Responsive: tablet ────────────────────────────────────── */
@media (max-width: 920px) {
    .intro-band,
    .split-section,
    .contact-container,
    .blog-card.large {
        grid-template-columns: 1fr;
    }

    .features,
    .service-grid,
    .course-grid,
    .portfolio-grid,
    .blog-grid {
        grid-template-columns: 1fr 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
    }

    .products-grid {
        grid-template-columns: 1fr 1fr;
    }

    .hero-slider {
        min-height: 620px;
    }
}

/* ── Responsive: mobile ────────────────────────────────────── */
@media (max-width: 640px) {
    .main-header {
        padding: 0.6rem 1rem;
    }

    /* Show hamburger, hide nav links by default */
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        background: #fff;
        border-bottom: 2px solid var(--color-border);
        box-shadow: 0 8px 24px rgba(5, 5, 5, 0.1);
        padding: 0.5rem 0;
        z-index: 19;
    }

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

    .nav-links li {
        width: 100%;
    }

    .nav-links a {
        display: block;
        padding: 0.75rem 1.5rem;
        font-size: 0.97rem;
        border-bottom: 1px solid var(--color-border);
    }

    .nav-links a::after {
        display: none;
    }

    /* Dropdown — mobile: inline, not floating */
    .nav-dropdown-toggle {
        display: flex;
        width: 100%;
        padding: 0.75rem 1.5rem;
        font-size: 0.97rem;
        border-bottom: 1px solid var(--color-border);
        justify-content: space-between;
    }

    .nav-dropdown-menu {
        position: static;
        transform: none;
        border: none;
        border-radius: 0;
        box-shadow: none;
        background: #f8fbf9;
        padding: 0;
        min-width: unset;
    }

    .nav-dropdown-menu li a {
        padding: 0.65rem 2rem;
        border-radius: 0;
        border-bottom: 1px solid var(--color-border);
    }

    .main-header nav {
        position: relative;
        flex-wrap: wrap;
    }

    .hero-slide,
    .page-hero {
        padding: 4rem 1.25rem;
    }

    .hero-slider {
        min-height: 680px;
    }

    .slider-controls {
        width: calc(100% - 2rem);
        justify-content: center;
        flex-wrap: wrap;
    }

    .intro-band,
    .features,
    .split-section,
    .program-strip,
    .blog-preview,
    .cta-band,
    .service-intro,
    .service-grid,
    .course-grid,
    .portfolio-grid,
    .blog-list,
    .contact-container,
    .catalog {
        width: min(100% - 2rem, 1200px);
    }

    .features,
    .service-grid,
    .course-grid,
    .portfolio-grid,
    .blog-grid,
    .products-grid,
    .footer-content {
        grid-template-columns: 1fr;
    }

    .split-section img {
        height: 300px;
    }

    .cta-band {
        flex-direction: column;
        align-items: flex-start;
        padding: 1.8rem;
    }
}

/* ══════════════════════════════════════════════════════════
   BLOG ARTICLE — Medium-style
   ══════════════════════════════════════════════════════════ */

.blog-article {
    background: var(--color-surface);
}

/* ── Hero image ─────────────────────────────────────────── */
.article-hero {
    width: 100%;
    max-height: 520px;
    overflow: hidden;
    background: var(--color-ink);
}

.article-hero img {
    width: 100%;
    max-height: 520px;
    object-fit: cover;
    object-position: center;
    display: block;
}

/* ── Two-column layout: sidebar TOC + content ───────────── */
.article-layout {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 3rem;
    max-width: 1080px;
    margin: 0 auto;
    padding: 3rem 2rem 4rem;
    align-items: start;
}

/* ── Sidebar TOC ────────────────────────────────────────── */
.article-toc {
    position: sticky;
    top: 90px;
}

.toc-label {
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-muted);
    margin-bottom: 0.75rem;
}

.article-toc nav ol {
    list-style: none;
    padding: 0;
    margin: 0;
    border-left: 2px solid var(--color-border);
    padding-left: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
}

.article-toc nav a {
    font-size: 0.875rem;
    color: var(--color-muted);
    text-decoration: none;
    transition: color 0.2s ease;
    line-height: 1.4;
}

.article-toc nav a:hover {
    color: var(--color-main);
}

/* ── Article content column ─────────────────────────────── */
.article-content {
    min-width: 0;
}

/* ── Meta line ──────────────────────────────────────────── */
.article-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--color-muted);
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.article-category {
    background: var(--color-main-soft);
    color: var(--color-main-dark);
    font-weight: 700;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.25rem 0.6rem;
    border-radius: 4px;
}

.article-dot {
    color: var(--color-border);
}

/* ── Title ──────────────────────────────────────────────── */
.article-title {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    line-height: 1.15;
    color: var(--color-ink);
    margin-bottom: 1.5rem;
    font-weight: 800;
}

/* ── Author row ─────────────────────────────────────────── */
.article-author {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    margin-bottom: 1.5rem;
}

.article-author img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: contain;
    background: var(--color-main-soft);
    padding: 4px;
    flex-shrink: 0;
}

.author-name {
    font-weight: 700;
    color: var(--color-ink);
    font-size: 0.95rem;
}

.author-sub {
    font-size: 0.82rem;
    color: var(--color-muted);
}

.article-divider {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: 1.75rem 0;
}

/* ── Body typography ────────────────────────────────────── */
.article-content section {
    margin-bottom: 2.5rem;
}

.article-content h2 {
    font-size: 1.55rem;
    font-weight: 800;
    color: var(--color-ink);
    margin-bottom: 1rem;
    margin-top: 0.5rem;
    padding-top: 0.5rem;
    border-top: 3px solid var(--color-main);
    display: inline-block;
}

.article-content h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-ink);
    margin-bottom: 0.6rem;
    margin-top: 1.5rem;
}

.article-content p,
.article-content li {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--color-text);
    margin-bottom: 1rem;
}

.article-content strong {
    color: var(--color-ink);
}

.article-content a {
    color: var(--color-main);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

.article-content a:hover {
    color: var(--color-main-dark);
}

.article-lead {
    font-size: 1.18rem !important;
    line-height: 1.75 !important;
    color: var(--color-ink) !important;
    font-weight: 400;
}

/* ── Component table ────────────────────────────────────── */
.component-table {
    border: 1px solid var(--color-border);
    border-radius: 10px;
    overflow: hidden;
    margin: 1.25rem 0;
    font-size: 0.93rem;
}

.component-row {
    display: grid;
    grid-template-columns: 2fr 0.6fr 2.4fr;
    gap: 0;
    border-bottom: 1px solid var(--color-border);
}

.component-row:last-child {
    border-bottom: none;
}

.component-row span {
    padding: 0.7rem 1rem;
    border-right: 1px solid var(--color-border);
    line-height: 1.5;
    color: var(--color-text);
}

.component-row span:last-child {
    border-right: none;
}

.component-row--header span {
    background: var(--color-main-soft);
    font-weight: 700;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-main-dark);
}

/* ── Pin table ──────────────────────────────────────────── */
.pin-table {
    border: 1px solid var(--color-border);
    border-radius: 10px;
    overflow: hidden;
    margin: 1.25rem 0;
    font-size: 0.9rem;
}

.pin-table-title {
    font-weight: 700;
    font-size: 0.82rem !important;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-muted) !important;
    padding: 0.5rem 1rem 0 !important;
    margin-bottom: 0 !important;
}

.pin-row {
    display: grid;
    grid-template-columns: 1fr 1fr 2fr;
    border-bottom: 1px solid var(--color-border);
}

.pin-row:last-child {
    border-bottom: none;
}

.pin-row span {
    padding: 0.6rem 1rem;
    border-right: 1px solid var(--color-border);
    line-height: 1.5;
    color: var(--color-text);
    font-family: 'SFMono-Regular', 'Consolas', monospace;
    font-size: 0.88rem;
}

.pin-row span:last-child {
    border-right: none;
    font-family: inherit;
    font-size: 0.88rem;
}

.pin-row--header span {
    background: var(--color-main-soft);
    font-weight: 700;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-main-dark);
    font-family: inherit;
}

/* ── Callout boxes ──────────────────────────────────────── */
.article-callout {
    display: flex;
    gap: 0.85rem;
    padding: 1rem 1.2rem;
    border-radius: 10px;
    margin: 1.25rem 0;
    align-items: flex-start;
    font-size: 0.95rem;
    line-height: 1.6;
}

.article-callout p,
.article-callout li {
    font-size: 0.95rem !important;
    margin-bottom: 0 !important;
}

.article-callout--tip {
    background: var(--color-main-soft);
    border-left: 4px solid var(--color-main);
    color: var(--color-text);
}

.article-callout--info {
    background: #e8f4fd;
    border-left: 4px solid #2196f3;
    color: var(--color-text);
}

.article-callout--warn {
    background: #fff8e1;
    border-left: 4px solid #f2b84b;
    color: var(--color-text);
}

.callout-icon {
    font-size: 1.1rem;
    flex-shrink: 0;
    margin-top: 1px;
}

.article-callout code {
    background: rgba(0,0,0,0.07);
    padding: 0.1em 0.4em;
    border-radius: 4px;
    font-family: 'SFMono-Regular', 'Consolas', monospace;
    font-size: 0.88em;
}

/* ── YouTube thumbnail link card ────────────────────────── */
.yt-thumb-link {
    display: block;
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    margin: 1.25rem 0 0.75rem;
    box-shadow: 0 4px 24px rgba(5,5,5,0.14);
    text-decoration: none;
}

.yt-thumb-link img {
    width: 100%;
    display: block;
    transition: transform 0.3s ease;
    aspect-ratio: 16/9;
    object-fit: cover;
}

.yt-thumb-link:hover img {
    transform: scale(1.02);
}

.yt-play-btn {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    background: rgba(0,0,0,0.28);
    color: #fff;
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    transition: background 0.2s ease;
}

.yt-thumb-link:hover .yt-play-btn {
    background: rgba(0,0,0,0.45);
}

.yt-play-btn svg {
    filter: drop-shadow(0 2px 8px rgba(0,0,0,0.4));
    transition: transform 0.2s ease;
}

.yt-thumb-link:hover .yt-play-btn svg {
    transform: scale(1.1);
}

/* ── YouTube embed ──────────────────────────────────────── */
.video-embed {
    position: relative;
    width: 100%;
    padding-top: 56.25%;
    border-radius: 12px;
    overflow: hidden;
    margin: 1.25rem 0 0.5rem;
    background: var(--color-ink);
    box-shadow: 0 8px 32px rgba(5,5,5,0.14);
}

.video-embed iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.video-caption {
    font-size: 0.85rem !important;
    color: var(--color-muted) !important;
    text-align: center;
    margin-top: 0.5rem !important;
}

/* ── Wiring diagram placeholder ─────────────────────────── */
.diagram-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 3rem 2rem;
    border: 2px dashed var(--color-border);
    border-radius: 12px;
    background: var(--color-page);
    text-align: center;
    color: var(--color-muted);
    margin: 1.25rem 0;
}

.diagram-placeholder svg {
    color: var(--color-border);
}

.diagram-placeholder p {
    font-weight: 700;
    color: var(--color-ink);
    margin-bottom: 0 !important;
    font-size: 1rem !important;
}

.diagram-placeholder span {
    font-size: 0.85rem;
    color: var(--color-muted);
}

/* ── Wiring diagram figure ──────────────────────────────── */
.wiring-figure {
    margin: 1.25rem 0;
}

.wiring-img {
    width: 100%;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    box-shadow: 0 4px 24px rgba(5,5,5,0.12);
    display: block;
}

.wiring-figure figcaption {
    text-align: center;
    font-size: 0.84rem;
    color: var(--color-muted);
    margin-top: 0.6rem;
}

/* ── Code block ─────────────────────────────────────────── */
.code-block-wrapper {
    margin: 1.25rem 0;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 18px rgba(5,5,5,0.12);
}

.code-block-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #1a1a2e;
    padding: 0.6rem 1rem;
    font-size: 0.8rem;
    color: #8892b0;
    font-family: 'SFMono-Regular', 'Consolas', monospace;
}

.copy-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    color: #ccd6f6;
    font-size: 0.78rem;
    font-family: inherit;
    padding: 0.3rem 0.7rem;
    border-radius: 5px;
    cursor: pointer;
    min-height: unset;
    transition: background 0.2s ease;
}

.copy-btn:hover {
    background: rgba(255,255,255,0.16);
}

.code-block {
    margin: 0;
    padding: 1.5rem 1.2rem;
    background: #0d1117;
    overflow-x: auto;
    font-family: 'SFMono-Regular', 'Consolas', 'Liberation Mono', monospace;
    font-size: 0.88rem;
    line-height: 1.7;
    color: #e6edf3;
}

.code-block code {
    font-family: inherit;
}

.c-comment { color: #8b949e; }
.c-keyword  { color: #ff7b72; }
.c-string   { color: #a5d6ff; }
.c-number   { color: #79c0ff; }
.c-fn       { color: #d2a8ff; }

/* ── Steps list ─────────────────────────────────────────── */
.article-steps {
    list-style: none;
    padding: 0;
    margin: 1rem 0;
    counter-reset: steps;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.article-steps li {
    counter-increment: steps;
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    margin-bottom: 0 !important;
}

.article-steps .step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--color-main);
    color: #fff;
    font-weight: 800;
    font-size: 0.8rem;
    flex-shrink: 0;
    margin-top: 2px;
    counter-increment: none;
}

.article-steps .step-num::before {
    content: counter(steps);
}

.article-steps .step-body {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.article-steps .step-body strong {
    font-size: 1.05rem;
    color: var(--color-ink);
    display: block;
}

.article-steps .step-body p {
    margin: 0;
    font-size: 0.98rem;
    color: #444;
    line-height: 1.65;
}

.article-list {
    padding-left: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.article-list li {
    line-height: 1.7;
}

/* ── Inline colour tags ─────────────────────────────────── */
.tag-green {
    background: var(--color-main-soft);
    color: var(--color-main-dark);
    font-weight: 700;
    padding: 0.1em 0.45em;
    border-radius: 4px;
    font-size: 0.95em;
}

.tag-red {
    background: #fce8e8;
    color: #c0392b;
    font-weight: 700;
    padding: 0.1em 0.45em;
    border-radius: 4px;
    font-size: 0.95em;
}

.tag-blue {
    background: #e8f0fe;
    color: #1a5276;
    font-weight: 700;
    padding: 0.1em 0.45em;
    border-radius: 4px;
    font-size: 0.95em;
}

/* ── Article tags ───────────────────────────────────────── */
.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin: 1.75rem 0;
}

.article-tag {
    padding: 0.35rem 0.85rem;
    border: 1px solid var(--color-border);
    border-radius: 99px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--color-muted);
    text-decoration: none;
    transition: border-color 0.2s ease, color 0.2s ease;
}

.article-tag:hover {
    border-color: var(--color-main);
    color: var(--color-main);
}

/* ── Author footer card ─────────────────────────────────── */
.article-author-footer {
    display: flex;
    gap: 1.1rem;
    align-items: flex-start;
    background: var(--color-page);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 1.4rem 1.6rem;
    margin-top: 2rem;
}

.article-author-footer img {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    object-fit: contain;
    background: var(--color-main-soft);
    padding: 6px;
    flex-shrink: 0;
}

.article-author-footer .author-name {
    font-size: 1rem;
    margin-bottom: 0.35rem;
}

.article-author-footer .author-sub {
    font-size: 0.92rem;
    line-height: 1.6;
    color: var(--color-muted);
}

/* ── Blog article responsive ────────────────────────────── */
@media (max-width: 860px) {
    .article-layout {
        grid-template-columns: 1fr;
        padding: 2rem 1.5rem 3rem;
    }

    .article-toc {
        position: static;
        border: 1px solid var(--color-border);
        border-radius: 10px;
        padding: 1rem 1.2rem;
        background: var(--color-page);
    }

    .article-toc nav ol {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 0.4rem 1rem;
        border-left: none;
        padding-left: 0;
    }

    .component-row {
        grid-template-columns: 1.5fr 0.5fr 2fr;
    }
}

@media (max-width: 640px) {
    .article-hero {
        max-height: 260px;
    }

    .article-layout {
        padding: 1.5rem 1rem 3rem;
        gap: 1.5rem;
    }

    .article-title {
        font-size: 1.6rem;
    }

    .component-row {
        grid-template-columns: 1fr;
    }

    .component-row span {
        border-right: none;
        border-bottom: 1px solid var(--color-border);
        padding: 0.5rem 0.75rem;
    }

    .component-row span:last-child {
        border-bottom: none;
    }

    .pin-row {
        grid-template-columns: 1fr 1fr;
    }

    .pin-row span:last-child {
        grid-column: 1 / -1;
        border-top: 1px solid var(--color-border);
        color: var(--color-muted);
        font-size: 0.8rem;
    }

    .article-author-footer {
        flex-direction: column;
    }
}