:root {
    --brand-dark: #050505;
    --brand-cyan: #22d3ee;
    --card-bg: rgba(30, 30, 30, 0.5);
    --border-color: rgba(255, 255, 255, 0.1);
}

::selection {
    background-color: var(--brand-cyan);
    color: var(--brand-dark);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--brand-dark);
    background-image: 
        radial-gradient(circle at 1px 1px, rgba(200, 200, 200, 0.05) 1px, transparent 0);
    background-size: 2rem 2rem;
}

.gradient-text {
    background: linear-gradient(90deg, #22d3ee, #06b6d4, #0891b2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-fill-color: transparent;
}

.contact-btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-weight: 500;
    color: white;
    background-color: transparent;
    border: 2px solid var(--brand-cyan);
    border-radius: 9999px;
    transition: all 0.3s ease;
    box-shadow: 0 0 15px rgba(34, 211, 238, 0.2);
}

.contact-btn:hover {
    background-color: var(--brand-cyan);
    color: var(--brand-dark);
    box-shadow: 0 0 25px rgba(34, 211, 238, 0.5);
    transform: translateY(-2px);
}

.glow-effect {
    position: absolute;
    inset: 0;
    width: 80%;
    height: 80%;
    margin: auto;
    background: var(--brand-cyan);
    filter: blur(120px);
    opacity: 0.25;
    z-index: 1;
}

.glow-effect-sm {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    margin: auto;
    background: var(--brand-cyan);
    filter: blur(80px);
    opacity: 0.1;
    z-index: 1;
}

.section-title {
    font-size: 2.5rem;
    line-height: 1.2;
    font-weight: 900;
    letter-spacing: -0.05em;
    color: white;
    margin-bottom: 1rem;
}

@media (min-width: 768px) {
    .section-title {
        font-size: 3.75rem;
    }
}

.section-subtitle {
    max-width: 42rem;
    margin-left: auto;
    margin-right: auto;
    font-size: 1.125rem;
    line-height: 1.75rem;
    color: #9ca3af;
}

.feature-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 2rem;
    height: 100%;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: rgba(34, 211, 238, 0.5);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

header.border-b {
    border-bottom-color: var(--border-color);
}