:root {
    --primary-color: #0d6efd;
    --primary-hover: #0b5ed7;
    --secondary-color: #6c757d;
    --secondary-hover: #5c636a;

    --dark-bg: #121212;
    --dark-text: #e0e0e0;
    --dark-fieldset-bg: #1e1e1e;
    --dark-border: #333;
    --dark-code-bg: #2d2d2d;
    --dark-log-bg: #2a2a2a;
    --dark-input-bg: #2d2d2d;
    --dark-input-text: #e0e0e0;
}

body {
    margin: 0;
    padding: 0;
    font-family: system-ui, -apple-system, sans-serif;
}

.main {
    width: 100%;
    max-width: 950px;
    margin: 0 auto;
    padding: 0 1rem;
    background: #fff;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    box-sizing: border-box;
}

.footer {
    display: flex;
    gap: 10px;
    font-size: 0.8rem;
    color: #666;
    flex-wrap: wrap;
    margin: 1rem 0;
}

.footer .links {
    display: flex;
    align-items: center;
}

.footer .links a {
    color: #666;
    text-decoration: none;
    position: relative;
    padding: 0 8px;
}

.footer .links a:first-child {
    padding-left: 0;
}

.footer .links a:not(:last-child)::after {
    content: "•";
    position: absolute;
    right: -4px;
    color: #999;
}

.footer a:hover {
    color: #0d6efd;
    text-decoration: underline;
}

.container {
	display: flex;
	justify-content: center; /* center in horizontal */
	align-items: flex-end; /* middle in vertical, at the  bottom of page */
	height: 3vh;
	margin-bottom: 5px;   /* distance to the bottom */
}

h3 {
    padding-bottom: .3em;
    border-bottom: 1px solid #CCC;
    text-align: center;
}

fieldset {
    border: none;
    box-shadow: 0 .5rem 0.5rem rgba(0, 0, 0, 0.2);
    background-color: #f8f9fa;
    padding: 10px;
    margin-bottom: 16px;
    border-radius: 4px;
}

fieldset legend {
    font-weight: bold;
    color: rgba(0, 0, 255, 0.6);
}

code {
    padding: .2em .4em;
    margin: 0;
    font-size: 85%;
    background: #CCC;
    border-radius: 3px;
}

.flex-container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 8px;
}

.flex-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

#status {
    margin: 10px 0;
}

#log {
    width: 100%;
    min-height: 100px;
    max-height: 300px;
    margin: 0;
    padding: 5px;
    background: #DDD;
    overflow-y: auto;
    overflow-x: hidden;
    font-family: ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace;
    box-sizing: border-box;
    word-break: break-word;
}

#log div {
    padding: 2px 0;
}

#log .time,
#log .action {
    display: inline-block;
    white-space: nowrap;
}

#log .time {
    color: #333;
    margin-right: 0.5em;
}

#log .action {
    color: #666;
    margin-right: 0.5em;
}

button {
    padding: 0.375rem 0.75rem;
    border: 1px solid var(--primary-color);
    border-radius: 0.375rem;
    margin-bottom: 5px;
    white-space: nowrap;
    cursor: pointer;
    font-size: 0.9rem;
}

button:disabled {
    opacity: 0.65;
}

button.primary {
    color: #fff;
    background-color: var(--primary-color);
}

button.primary:hover {
    color: #fff;
    border-color: var(--primary-hover);
    background-color: var(--primary-hover);
}

button.secondary {
    color: #fff;
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
}

button.secondary:hover {
    color: #fff;
    border-color: var(--secondary-hover);
    background-color: var(--secondary-hover);
}

input[type=text],
input[type=number],
select {
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: #212529;
    border: 1px solid #dee2e6;
    border-radius: 0.375rem;
    padding: .2rem .75rem;
    max-width: 100%;
    box-sizing: border-box;
}

input[type=file] {
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: #212529;
    max-width: 100%;
}

input::file-selector-button {
    font-size: 0.9rem;
    font-weight: 400;
    line-height: 1.5;
    border: 1px solid var(--primary-color);
    border-radius: 0.375rem;
    cursor: pointer;
}

select {
    padding: .3rem 2.25rem .3rem .75rem;
}

input:focus,
select:focus {
    border: 1px solid #86b7fe;
    box-shadow: 0 0 4px rgba(0, 120, 215, 0.8);
    outline: 0;
}

label {
    margin-right: 4px;
    white-space: nowrap;
}

input[type=text]:disabled,
input[type=number]:disabled,
select:disabled {
    opacity: 0.65;
    cursor: not-allowed;
    background-color: #e9ecef;
    color: #6c757d;
}

@media (max-width: 768px) {
    .flex-container {
        flex-direction: column;
    }
    .flex-container.options .flex-group label {
        min-width: 80px;
    }

    #log {
        height: 150px;
        margin-top: 10px;
    }

    fieldset {
        padding: 8px;
    }

    button {
        width: auto;
    }

    input[type=text],
    input[type=number],
    select {
        max-width: 100%;
        margin-bottom: 5px;
    }
}