:root {
    font-family: system-ui, sans-serif;
    color: #18302d;
    background: #f3f6f4;
}
body {
    margin: 0;
}
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #17483f;
    color: white;
    padding: 1.2rem 2rem;
}
main {
    max-width: 1000px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}
section {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1rem;
}
button,
.button {
    display: inline-block;
    font: inherit;
    background: #176954;
    color: white;
    border: none;
    border-radius: 6px;
    padding: 0.7rem 1rem;
    text-decoration: none;
    cursor: pointer;
    margin-right: 0.5rem;
}
button:disabled {
    opacity: 0.5;
    cursor: wait;
}
ul {
    padding: 0;
    list-style: none;
}
li {
    display: flex;
    gap: 1rem;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
    border-bottom: 1px solid #ddd;
}
#message {
    color: #873516;
}
video {
    width: 100%;
    max-height: 65vh;
    background: #111;
}
[hidden] {
    display: none;
}

label {
    display: block;
    margin: 0.8rem 0;
}
input {
    display: block;
    font: inherit;
    padding: 0.6rem;
    width: min(24rem, 90%);
    border: 1px solid #aaa;
    border-radius: 4px;
}