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

html, body {
    min-height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: #fff;
}

body {
    background: url("assets/background.jpg") center center / cover no-repeat fixed;
    background-color: #0f1419;
    min-height: 100vh;
    position: relative;
}

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 120px;
    padding: 24px 32px;
    z-index: 10;
    background: linear-gradient(
        to bottom,
        rgba(0, 0, 0, 0.55) 0%,
        rgba(0, 0, 0, 0.25) 50%,
        rgba(0, 0, 0, 0) 100%
    );
    display: flex;
    align-items: flex-start;
}

.header-logo {
    display: inline-block;
    line-height: 0;
}

.header-logo img {
    height: 42px;
    width: auto;
    display: block;
    transition: filter 0.25s ease;
}

.header-logo:hover img,
.header-logo:focus-visible img,
.header-logo:active img {
    filter: drop-shadow(0 0 6px rgba(255, 255, 255, 0.9))
            drop-shadow(0 0 16px rgba(255, 255, 255, 0.55));
}

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 140px 32px 64px;
    text-align: center;
}

.hero-logo {
    max-width: min(512px, 48vw);
    width: 100%;
    height: auto;
    margin-bottom: 36px;
}

.hero-tagline {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 300;
    letter-spacing: 0.01em;
    line-height: 1.25;
    margin: 0 0 18px;
    max-width: 640px;
    text-shadow: 0 2px 16px rgba(0, 0, 0, 0.55);
}

.hero-sub {
    font-size: clamp(0.95rem, 1.5vw, 1.1rem);
    font-weight: 300;
    line-height: 1.6;
    opacity: 0.92;
    max-width: 560px;
    text-shadow: 0 1px 10px rgba(0, 0, 0, 0.55);
}

@media (max-width: 640px) {
    .site-header {
        height: 96px;
        padding: 18px 20px;
    }
    .header-logo img {
        height: 30px;
    }
    .hero {
        padding: 110px 24px 48px;
    }
    .hero-logo {
        max-width: 68vw;
        margin-bottom: 28px;
    }
}