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

html {
    scroll-behavior: smooth;
}

body {
    background: #fff;
    color: #0f1117;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

pre,
code {
    font-family: 'SF Mono', 'Fira Code', monospace;
}

ul,
ol {
    list-style: none;
}

a {
    color: inherit;
}

/* ── Responsive layout utilities ── */
.r-section {
    padding: 5.5rem 7%;
}

.r-hero {
    min-height: 100vh;
    padding: 146px 7% 70px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 4.5rem;
}

.r-grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4.5rem;
    align-items: center;
}

.r-grid-2s {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4.5rem;
    align-items: start;
}

.r-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

.r-grid-hiw {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    position: relative;
}

.r-grid-cases {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
}

.r-grid-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
}

.r-grid-feats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.45rem;
}

.r-grid-wl {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    border-top: 1px solid #fed7aa;
}

.r-grid-foot {
    display: grid;
    grid-template-columns: 1.8fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.r-nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.r-hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
}

.r-mobile-menu {
    display: none;
}

@media (max-width: 900px) {
    .r-hero {
        grid-template-columns: 1fr;
        padding: 136px 6% 50px;
        min-height: auto;
    }

    .r-grid-2 {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .r-grid-2s {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .r-grid-cases {
        grid-template-columns: 1fr;
    }

    .r-nav-links {
        display: none;
    }

    .r-hamburger {
        display: flex;
    }

    .r-mobile-menu.open {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 98px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(14px);
        border-bottom: 1px solid #e4e7ef;
        padding: 1.25rem 6%;
        gap: 0.75rem;
        z-index: 99;
    }
}

@media (max-width: 720px) {
    .r-section {
        padding: 3.5rem 5%;
    }

    .r-grid-hiw {
        grid-template-columns: 1fr;
    }

    .r-grid-3 {
        grid-template-columns: 1fr;
    }

    .r-grid-wl {
        grid-template-columns: 1fr 1fr;
    }

    .r-grid-foot {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }

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

    .r-grid-feats {
        grid-template-columns: 1fr;
    }
}

.r-contact-topics {
    grid-template-columns: 1fr 1fr !important;
}

.r-contact-2col {
    grid-template-columns: 1fr !important;
}

@media (max-width: 480px) {
    .r-section {
        padding: 2.75rem 4.5%;
    }

    .r-grid-wl {
        grid-template-columns: 1fr;
    }

    .r-grid-foot {
        grid-template-columns: 1fr;
    }

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

    .r-demo-bar-sub {
        display: none;
    }
}

/* WL grid cell borders adapt to column count */
.r-grid-wl>div {
    border-right: 1px solid #fed7aa;
    border-bottom: 1px solid #fed7aa;
}

.r-grid-wl>div:nth-child(3n) {
    border-right: none;
}

.r-grid-wl>div:nth-last-child(-n+3):not(:nth-child(-n+3)) {
    border-bottom: none;
}

@media (max-width: 720px) {
    .r-grid-wl>div:nth-child(3n) {
        border-right: 1px solid #fed7aa;
    }

    .r-grid-wl>div:nth-child(2n) {
        border-right: none;
    }

    .r-grid-wl>div:nth-last-child(-n+2) {
        border-bottom: none;
    }

    .r-grid-wl>div:nth-last-child(1) {
        border-bottom: none;
    }
}

@media (max-width: 480px) {
    .r-grid-wl>div {
        border-right: none;
    }

    .r-grid-wl>div:last-child {
        border-bottom: none;
    }
}

#loading-spinner {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 6px solid #e5e7eb;
    border-top: 6px solid #3b82f6;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}