body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: #0a0e14;
    color: #e6edf3;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

.card {
    background: #161b22;
    border: 1px solid #30363d;
    border-radius: 14px;
    padding: 20px;
    margin-bottom: 24px;
}

h1 {
    color: #00bcd4;
    margin-top: 0;
}

h2 {
    color: #58a6ff;
    margin-top: 0;
}

input,
select,
textarea {
    width: 100%;
    padding: 8px;
    margin-top: 6px;
    margin-bottom: 12px;
    background: #0d1117;
    color: #e6edf3;
    border: 1px solid #30363d;
}

textarea {
    min-height: 80px;
}

button {
    padding: 10px 16px;
    background: #00bcd4;
    border: 0;
    color: #000;
    font-weight: bold;
    cursor: pointer;
    border-radius: 8px;
}

button:hover {
    background: #00a0b5;
}

.primary-action {
    display: inline-block;
    margin-top: 20px;
    padding: 14px 22px;
    background: linear-gradient(135deg, #00bcd4, #58a6ff);
    color: #000;
    font-weight: bold;
    text-decoration: none;
    border-radius: 14px;
}

.primary-action:hover {
    filter: brightness(1.1);
}

#qrResult {
    margin-top: 20px;
}

#qrResult canvas {
    max-width: 220px;   /* adjust to taste: 200–240 is ideal */
    width: 100%;
    height: auto;
}


#downloadBtn {
    margin-top: 20px;   /* adjust: 12–20px */
}

#dropZone {
    border: 2px dashed #30363d;
    padding: 30px;
    text-align: center;
    color: #8b949e;
}

#dropZone.drag {
    border-color: #00bcd4;
    color: #00bcd4;
}

#dropZone.drag-over {
    border-color: #6fe7f2;
    background: rgba(111,231,242,0.1);
}


.small {
    color: #8b949e;
    font-size: 12px;
}

.nav-bar {
    margin-bottom: 16px;
}

.nav-button {
    display: inline-block;
    padding: 8px 14px;
    background: #161b22;
    border: 1px solid #30363d;
    color: #58a6ff;
    text-decoration: none;
    border-radius: 10px;
    font-weight: bold;
}

.nav-button:hover {
    background: #1f2630;
    color: #00bcd4;
}