* { box-sizing: border-box; }

body {
    margin: 0;
    padding: 1rem;
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    background: #14171c;
    color: #f0f0f0;
}

h1 {
    font-size: 1.4rem;
    margin: 0 0 1rem;
}

.stack {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-width: 480px;
    margin: 0 auto;
}

.btn {
    display: block;
    width: 100%;
    padding: 1rem;
    font-size: 1.1rem;
    border: none;
    border-radius: 10px;
    background: #3a7bd5;
    color: #fff;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
}

.btn.secondary {
    background: #333a44;
}

.btn:disabled {
    background: #555;
    cursor: not-allowed;
}

input[type="text"] {
    width: 100%;
    padding: 0.9rem;
    font-size: 1.4rem;
    text-align: center;
    letter-spacing: 0.2rem;
    text-transform: uppercase;
    border-radius: 10px;
    border: 1px solid #444;
    background: #1c2027;
    color: #fff;
}

video, img.preview {
    width: 100%;
    border-radius: 10px;
    background: #000;
}

.video-wrap {
    overflow: hidden;
    border-radius: 10px;
}

.video-wrap video {
    display: block;
    transform-origin: center center;
}

.zoom-control {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.9rem;
}

.zoom-control input[type="range"] {
    flex: 1;
}

.zoom-control span {
    white-space: nowrap;
}

.code-display {
    font-size: 2.2rem;
    font-weight: bold;
    letter-spacing: 0.3rem;
    text-align: center;
    padding: 0.75rem;
    background: #1c2027;
    border-radius: 10px;
}

.status {
    font-size: 0.95rem;
    color: #aab;
    text-align: center;
}

.error {
    color: #ff6b6b;
    text-align: center;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 0.4rem 0.5rem;
    border-bottom: 1px solid #2a2f38;
    text-align: left;
}

.totals {
    font-size: 1.1rem;
    font-weight: bold;
}

.hidden {
    display: none;
}