html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: 'Segoe UI', sans-serif;
    background: #e6f7ff; /* Light blue sky background */
    overflow: hidden; /* Prevent scrolling */
}

body {
    position: relative; /* For absolute positioning of drones/clouds */
    display: flex;
    justify-content: center;
    align-items: flex-start; /* Align content to the top */
}
.drone img {
    display: block;
    width: 100%;
    height: 100%;
    pointer-events: none; /* prevent interfering with pointer */
}

.background {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    z-index: 0;
    pointer-events: none;
    background: url('https://greenflight.co.nz/thankyou/images/final_background_combined.png') no-repeat bottom center;
    background-size: cover;
}

.drone {
    position: absolute;
    width: 70px;
    height: 70px;
    opacity: 0.9;
    visibility: hidden;
    z-index: 3;
    will-change: transform, left, opacity, visibility;
}

.drone svg {
    width: 100%;
    height: 100%;
    filter: drop-shadow(2px 2px 2px rgba(0,0,0,0.3));
}


.container {
    position: relative;
    z-index: 5;
    margin-top: 15vh;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 16px;
    text-align: center;
    padding: 2rem;
    max-width: 600px;
    box-shadow: 0 0 20px rgba(0,0,0,0.2);
}

h1 {
    color: #0077aa;
    font-size: 2rem;
}

p {
    color: #222;
    font-size: 1.1rem;
    margin: 1rem 0;
}

a.button {
    display: inline-block;
    margin-top: 1.5rem;
    text-decoration: none;
    color: white;
    background-color: #00bcd4;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    transition: background 0.3s ease;
}

a.button:hover {
    background-color: #0097a7;
}

.cloud {
    position: absolute;
    width: 250px;
    height: 150px;
    opacity: 0.6;
    z-index: 1;
    pointer-events: none;
    will-change: transform;
}