:root {
    --background-color: #f4f4f4;
    --ibm-blue: #0F62FE;
    --dark-blue: #052F5F;
    --pale-blue: #A6C8FF;
}

body {
    font-family: 'IBM Plex Sans', Arial, sans-serif;
    background: var(--background-color);
    margin: 0;
    padding: 0;
}
.container {
    background: #fff;
    max-width: 100%;
    width: 100%;
    margin: 3em auto;
    padding: 2.5em 2em 2em 2em;
    border-radius: 12px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.08);
    text-align: center;
    box-sizing: border-box;
}
.ibm-logo {
    width: 120px;
    margin-bottom: 1.5em;
}
h1 {
    color: var(--dark-blue);
    font-size: 2em;
    margin-bottom: 1.2em;
    font-weight: 700;
    letter-spacing: 1px;
}
label {
    font-weight: 700;
    color: var(--dark-blue);
    display: block;
    margin-bottom: 0.5em;
    text-align: left;
}
#message {
    width: 100%;
    padding: 0.7em;
    border: 1px solid var(--pale-blue);
    border-radius: 6px;
    font-size: 1em;
    margin-bottom: 1.2em;
    box-sizing: border-box;
    transition: border-color 0.2s;
}
#message:focus {
    border-color: var(--ibm-blue);
    outline: none;
}
#signBtn {
    background: linear-gradient(90deg, var(--ibm-blue) 60%, var(--dark-blue) 100%);
    color: #fff;
    border: none;
    border-radius: 6px;
    padding: 0.7em 2em;
    font-size: 1.1em;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s, box-shadow 0.2s;
    box-shadow: 0 2px 8px rgb(from var(--ibm-blue) r g b / 0.08);
}
#signBtn:hover {
    background: linear-gradient(90deg, var(--dark-blue) 60%, var(--ibm-blue) 100%);
}

#qrcode {
    margin-top: 2em;
    min-height: 256px;
    display: flex;
    justify-content: center;
    align-items: center;
}
.qr-row {
    display: flex;
    justify-content: space-between;
    gap: 1em;
    margin-top: 2em;
    margin-bottom: 2em;
}
.qr-block {
    flex: 1 1 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.qr-title {
    font-weight: 700;
    color: var(--ibm-blue);
    margin-bottom: 0.5em;
    font-size: 1.1em;
    letter-spacing: 1px;
}
.qr-row-faest {
    display: flex;
    justify-content: center;
    gap: 2em;
    margin-bottom: 2em;
    margin-top: 2em;
    flex-wrap: wrap;
    width: 100%;
    box-sizing: border-box;
}
.qr-block-faest {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1 1 0;
    min-width: 0;
    max-width: 100%;
}
#qrcode-faest1, #qrcode-faest2 {
    min-height: 0;
    width: 100%;
    max-width: 384px;
    display: flex;
    justify-content: center;
    align-items: center;
    box-sizing: border-box;
}
.qr img {
    visibility: hidden;
}
.qr.active img {
    visibility: visible;
    cursor: pointer;
}
.qr.active img:hover {
    outline: solid thick var(--ibm-blue);
}
.qr.error {
    color: red;
}
.spinner img {
    border: 6px solid #e0e6f0;
    border-top: 6px solid var(--ibm-blue);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    animation: spin 1s linear infinite;
    margin: 32px auto;
}
#qrcode-faest .spinner img {
    width: 96px;
    height: 96px;
    border-width: 12px;
}
@keyframes spin {
    0% { transform: rotate(0deg);}
    100% { transform: rotate(360deg);}
}
.footer {
    margin-top: 2em;
    color: var(--pale-blue);
    font-size: 0.95em;
}
@media (max-width: 900px) {
    .container {
        padding: 1em 0.2em;
    }
    .qr-row-faest {
        flex-direction: column;
        align-items: center;
        gap: 1em;
    }
    .qr-block-faest {
        width: 100%;
    }
    #qrcode-faest1, #qrcode-faest2 {
        width: 90vw;
        max-width: 384px;
    }
}

#print-area { display: none }

.bindata {
    display: block;
    max-height: 4.5em;
    overflow: auto;
}