/* ── Hero split layout ──────────────────────────────────── */
.hero-split {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 3rem;
    padding: 2rem 1rem 1rem;
    max-width: 960px;
    margin: 0 auto;
}

.hero-text {
    flex: 1;
    min-width: 0;
}

.hero-kicker {
    margin-bottom: 0.6rem;
    color: var(--md-primary-fg-color);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.hero-text h1 {
    font-size: 3.2rem !important;
    font-weight: 800 !important;
    margin-bottom: 0.35rem !important;
    letter-spacing: -0.06em;
    line-height: 0.96;
    text-wrap: balance;
}

.hero-deck {
    max-width: 34rem;
    margin: 0 0 0.8rem !important;
    color: var(--md-default-fg-color--light);
    font-size: 1.12rem;
    line-height: 1.45;
}

.hero-text p {
    margin: 0.4rem 0 !important;
    font-size: 0.95rem;
}

.hero-text .md-button {
    margin: 0.3rem 0.4rem 0.3rem 0;
}

/* ── Hero image ─────────────────────────────────────────── */
.hero-image-wrapper {
    flex-shrink: 0;
}

.hero-image-wrapper img.hero-image,
.md-typeset img.hero-image {
    display: block;
    width: 360px;
    max-width: 360px;
    border-radius: 18px;
    border: 1px solid rgba(88, 166, 255, 0.16);
    box-shadow: 0 18px 42px rgba(15, 23, 42, 0.22);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hero-image-wrapper img.hero-image:hover,
.md-typeset img.hero-image:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 24px 48px rgba(15, 23, 42, 0.28);
}

/* ── Card images inside grid cards ──────────────────────── */
.card-image {
    width: 100%;
    max-height: 220px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 0.6rem;
}

/* ── Architecture diagram ───────────────────────────────── */
.arch-image {
    display: block;
    margin: 1rem auto 1.5rem;
    max-width: 1080px;
    width: 100%;
    border-radius: 18px;
    border: 1px solid rgba(88, 166, 255, 0.12);
    box-shadow: 0 20px 44px rgba(15, 23, 42, 0.18);
}

.md-header__button.md-logo img,
.md-header__button.md-logo svg {
    width: 2rem !important;
    height: 2rem !important;
    object-fit: cover;
    border-radius: 0.45rem;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.22);
}

/* ── Hardware diagram embed ─────────────────────────────── */
.diagram-legend {
    display: flex;
    justify-content: center;
    gap: 0.4rem;
    font-size: 0.78rem;
    color: var(--md-default-fg-color--light);
    margin-bottom: 0.8rem;
    flex-wrap: wrap;
}

.legend-i2c { color: #58a6ff !important; }
.legend-gpio { color: #3fb950 !important; }
.legend-pwm { color: #d2a8ff !important; }
.legend-usb { color: #f0883e !important; }
.legend-pwr { color: #f85149 !important; }

.diagram-wrapper {
    max-width: 1080px;
    margin: 0 auto 1.5rem;
    border-radius: 14px;
    overflow: hidden;
    border: 1px solid rgba(88, 166, 255, 0.12);
    box-shadow: 0 16px 40px rgba(15, 23, 42, 0.22);
}

.hw-diagram {
    display: block;
    width: 100%;
    aspect-ratio: 1340 / 1020;
    border: none;
    background: transparent;
}

@media (max-width: 768px) {
    .diagram-wrapper {
        border-radius: 10px;
    }
}

/* ── Footer links ───────────────────────────────────────── */
.footer-links {
    text-align: center;
    padding: 1.5rem 0 0.5rem;
    opacity: 0.65;
    font-size: 0.92rem;
}

/* ── Responsive tweaks ──────────────────────────────────── */
@media (max-width: 768px) {
    .hero-split {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
        padding: 1rem;
    }
    .hero-text h1 {
        font-size: 2.35rem !important;
    }
    .hero-image-wrapper img.hero-image,
    .md-typeset img.hero-image {
        width: 260px;
        max-width: 260px;
    }
}