/* Critical CSS - Above the fold styles only */
:root {
    --primary: #6366F1;
    --primary-bg: #EEF2FF;
    --gray-900: #1E293B;
    --gray-600: #4B5563;
    --gray-100: #F3F4F6;
    --radius-lg: 12px;
}

/* Essential reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
    scrollbar-gutter: stable;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #0F172A;
    background: #FFFFFF;
    -webkit-font-smoothing: antialiased;
}

/* Critical layout components */
.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 16px;
}

.page-header {
    padding: 40px 0 24px;
}

/* Critical typography */
h1 {
    font-size: clamp(1.75rem, 4.5vw, 2.5rem);
    line-height: 1.2;
    margin: 0 0 8px;
    font-weight: 700;
}

/* Critical buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    border-radius: 12px;
    padding: .75rem 1rem;
    text-decoration: none;
    font-weight: 600;
    border: none;
    cursor: pointer;
}

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

.btn-outline {
    background: transparent;
    color: var(--gray-900);
    border: 2px solid var(--gray-900);
}

/* Critical content styles */
.content-cluster {
    background: var(--gray-100);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    margin: 1.5rem 0;
    border-left: 4px solid var(--primary);
}

.related-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.related-card {
    background: #fff;
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid var(--gray-100);
}

.related-card h4 {
    margin: 0 0 0.5rem 0;
    color: var(--primary);
}

.related-card p {
    margin: 0;
    font-size: 0.9rem;
    color: var(--gray-600);
}

/* Critical author bio */
.author-bio {
    background: var(--gray-100);
    padding: 2rem;
    border-radius: var(--radius-lg);
    margin: 3rem 0;
    border-left: 4px solid var(--primary);
}

.author-bio h3 {
    margin: 0 0 1rem 0;
    color: var(--gray-900);
}

.author-bio p {
    margin: 0 0 0.5rem 0;
    color: var(--gray-600);
}

.author-credentials {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.credential-badge {
    background: white;
    color: var(--primary);
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid var(--primary);
}

/* Critical navigation placeholder */
#header-placeholder {
    min-height: 72px;
}

/* Critical mesh gradient */
.mesh-gradient {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 100vh;
    background: radial-gradient(at 40% 20%, hsla(280,100%,74%,0.3) 0px, transparent 50%),
                radial-gradient(at 80% 0%, hsla(189,100%,56%,0.3) 0px, transparent 50%),
                radial-gradient(at 0% 50%, hsla(355,100%,93%,0.2) 0px, transparent 50%),
                radial-gradient(at 80% 100%, hsla(240,100%,70%,0.2) 0px, transparent 50%),
                radial-gradient(at 0% 100%, hsla(22,100%,77%,0.2) 0px, transparent 50%);
    opacity: 0.4;
    z-index: -1;
}