:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --bg-dark: #0f172a;
    --bg-card: rgba(30, 41, 59, 0.7);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --font-heading: 'Plus Jakarta Sans', sans-serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-body);
    line-height: 1.5;
    overflow-x: hidden;
    min-height: 100vh;
}

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    overflow: hidden;
}

.bg-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80vw;
    height: 80vw;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, rgba(15, 23, 42, 0) 70%);
    z-index: -1;
    pointer-events: none;
}

.content {
    max-width: 800px;
    text-align: center;
    z-index: 10;
}

.branding {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.logo {
    width: 120px;
    height: 120px;
    object-fit: contain;
    filter: drop-shadow(0 0 20px rgba(99, 102, 241, 0.3));
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.logo:hover {
    transform: scale(1.05);
}

.label {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--primary);
    background: linear-gradient(to right, #818cf8, #6366f1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.headline {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 3rem;
    color: var(--text-main);
}

.btn-substack {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: #ffffff;
    color: #0f172a;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.125rem;
    border-radius: 99rem;
    box-shadow: 0 10px 20px -5px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.btn-substack:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 25px -10px rgba(0, 0, 0, 0.3);
    background: #f8fafc;
}

.icon-substack {
    width: 20px;
    height: 20px;
    object-fit: contain;
    flex-shrink: 0;
}

/* Animations */
.animate-in {
    opacity: 0;
    transform: translateY(20px);
    animation: slideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes slideUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Mobile Tweaks */
@media (max-width: 640px) {
    .hero {
        padding: 1.5rem;
    }
    
    .logo {
        width: 100px;
        height: 100px;
    }
    
    .headline {
        margin-bottom: 2rem;
    }
}