:root {
    --primary-color: #2D1B3D;
    --secondary-color: #4A2B6B;
    --accent-color: #8A4FFF;
    --text-color: #FFFFFF;
    --input-bg: rgba(255, 255, 255, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-color);
    min-height: 100vh;
}

.screen {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.hidden {
    display: none;
}

/* Login Screen */
.login-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    position: relative;
}

.login-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(45, 27, 61, 0.8);
    z-index: 1;
}

.logo {
    text-align: center;
    margin-bottom: 40px;
    position: relative;
    z-index: 2;
}

.logo img {
    width: 80px;
    height: 80px;
    margin-bottom: 15px;
    content: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path fill="%23FFFFFF" d="M256 384c-70.7 0-128-57.3-128-128s57.3-128 128-128 128 57.3 128 128-57.3 128-128 128zm0-32c52.9 0 96-43.1 96-96s-43.1-96-96-96-96 43.1-96 96 43.1 96 96 96z"/><path fill="%23FFFFFF" d="M464 96h-88l-12.4-32.9C356.3 44.9 338.8 32 319.1 32H192.9c-19.7 0-37.2 12.9-44.5 32.1L136 96H48c-26.5 0-48 21.5-48 48v288c0 26.5 21.5 48 48 48h416c26.5 0 48-21.5 48-48V144c0-26.5-21.5-48-48-48zM256 416c-88.4 0-160-71.6-160-160s71.6-160 160-160 160 71.6 160 160-71.6 160-160 160z"/></svg>');
}

.logo h1 {
    font-size: 2.5rem;
    letter-spacing: 2px;
}

/* QR-Scanner Container */
#qr-scanner {
    width: 100%;
    max-width: 300px;
    margin: 20px auto;
    position: relative;
    z-index: 2;
    background: var(--input-bg);
    border-radius: 10px;
    padding: 10px;
    overflow: hidden;
    aspect-ratio: 1;
}

/* Scanner Video Element */
#qr-scanner video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
}

/* Verstecke alle UI Elemente des Scanners */
#qr-scanner select,
#qr-scanner input,
#qr-scanner br,
#qr-scanner img[alt="Info icon"],
#qr-scanner img[alt="Camera icon"] {
    display: none !important;
}

/* Scan-Region-Overlay */
#qr-scanner::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    border: 2px solid var(--accent-color);
    border-radius: 8px;
    box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.5);
    z-index: 2;
}

/* Scanning-Animation */
#qr-scanner::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 2px;
    background: var(--accent-color);
    animation: scan 2s infinite;
    z-index: 3;
    box-shadow: 0 0 8px var(--accent-color);
}

@keyframes scan {
    0% {
        transform: translate(-50%, -100px);
    }
    50% {
        transform: translate(-50%, 100px);
    }
    100% {
        transform: translate(-50%, -100px);
    }
}

/* Main Screen */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background-color: var(--primary-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

header h2 {
    font-size: 1.5rem;
    letter-spacing: 1px;
}

#logout-btn {
    background: transparent;
    border: 1px solid var(--text-color);
    color: var(--text-color);
    padding: 8px 15px;
    border-radius: 20px;
    cursor: pointer;
}

.button-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 40px;
    padding: 0 20px;
}

.main-btn {
    padding: 20px;
    font-size: 1.2rem;
    border: none;
    border-radius: 10px;
    background: var(--accent-color);
    color: var(--text-color);
    cursor: pointer;
    transition: transform 0.3s, background-color 0.3s;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.main-btn:active {
    transform: scale(0.98);
    background-color: #7340DB;
}

/* Responsive Anpassungen */
@media (min-width: 768px) {
    .button-container {
        max-width: 500px;
        margin-left: auto;
        margin-right: auto;
    }
}

/* Kamera-UI Styles */
#camera-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--primary-color);
    z-index: 1000;
    display: flex;
    flex-direction: column;
}

#camera-preview {
    flex: 1;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.camera-controls {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 20px;
    display: flex;
    justify-content: space-around;
    background: rgba(0, 0, 0, 0.5);
}

.camera-controls button {
    padding: 15px 30px;
    border: none;
    border-radius: 25px;
    background: var(--accent-color);
    color: white;
    font-size: 1rem;
    cursor: pointer;
}

#capture-btn {
    background: var(--accent-color) !important;
}

#cancel-btn {
    background: #666 !important;
}