:root {
    --tg-theme-bg-color: #f9f9f9;
    --tg-theme-text-color: #333333;
    --tg-theme-hint-color: #b3b3b3;
    --tg-theme-link-color: #00aaff;
    --tg-theme-button-color: #00aaff;
    --tg-theme-button-text-color: #ffffff;
    --tg-theme-shadow-color: rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--tg-theme-bg-color);
    color: var(--tg-theme-text-color);
    transition: all 0.3s ease;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    box-sizing: border-box;
    padding-bottom: 80px;
    background-color: #ffffff;
    border-radius: 12px;
    box-shadow: 0 4px 12px var(--tg-theme-shadow-color);
}

.tab-content {
    display: none;
    animation: fadeIn 0.4s ease-in-out;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.nav-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 60px;
    background-color: #ffffff;
    border-top: 1px solid #e0e0e0;
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-shadow: 0 -4px 8px var(--tg-theme-shadow-color);
    z-index: 10;
}

.nav-item {
    color: var(--tg-theme-hint-color);
    text-decoration: none;
    font-size: 14px;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: color 0.3s ease;
}

.nav-item.active {
    color: var(--tg-theme-button-color);
}

.nav-item svg {
    width: 24px;
    height: 24px;
    margin-bottom: 5px;
    transition: transform 0.3s ease;
}

.nav-item.active svg {
    transform: scale(1.1);
}

input[type="text"], button {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border: 1px solid var(--tg-theme-hint-color);
    border-radius: 8px;
    font-size: 16px;
    box-shadow: 0 2px 6px var(--tg-theme-shadow-color);
    transition: all 0.3s ease;
}

input[type="text"]:focus {
    border-color: var(--tg-theme-button-color);
    box-shadow: 0 2px 10px rgba(0, 136, 204, 0.2);
}

button {
    background-color: var(--tg-theme-button-color);
    color: var(--tg-theme-button-text-color);
    border: none;
    cursor: pointer;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
    padding: 12px;
    border-radius: 8px;
    box-shadow: 0 4px 8px var(--tg-theme-shadow-color);
}

button:hover {
    background-color: #0077aa;
    box-shadow: 0 6px 12px var(--tg-theme-shadow-color);
}

#qrcode {
    text-align: center;
    margin-top: 20px;
}

#scanArea {
    width: 100%;
    height: 300px;
    background-color: #f0f0f0;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 12px;
    box-shadow: 0 4px 8px var(--tg-theme-shadow-color);
    margin-bottom: 20px;
}

.drop-area {
    border: 2px dashed var(--tg-theme-hint-color);
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    cursor: pointer;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 8px var(--tg-theme-shadow-color);
}

.drop-area:hover {
    background-color: rgba(0, 136, 204, 0.1);
    box-shadow: 0 6px 12px var(--tg-theme-shadow-color);
}

.form-group input[type="color"] {
    height: 40px;
    padding: 2px;
    border-radius: 4px;
    box-shadow: 0 2px 6px var(--tg-theme-shadow-color);
}

.form-group input[type="range"] {
    -webkit-appearance: none;
    height: 10px;
    background: #d3d3d3;
    outline: none;
    opacity: 0.7;
    border-radius: 8px;
    box-shadow: 0 2px 4px var(--tg-theme-shadow-color);
    transition: opacity 0.2s ease;
}

.form-group input[type="range"]:hover {
    opacity: 1;
}

.form-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: #00aaff;
    cursor: pointer;
    border-radius: 50%;
}

.generate-btn, .download-btn, .telegram-btn {
    width: 100%;
    padding: 12px;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    margin-top: 15px;
    transition: background-color 0.3s, box-shadow 0.3s;
    box-shadow: 0 4px 8px var(--tg-theme-shadow-color);
}

.generate-btn {
    background-color: #28a745;
}

.generate-btn:hover {
    background-color: #218838;
}

.download-btn {
    background-color: #007bff;
}

.download-btn:hover {
    background-color: #0056b3;
}

.telegram-btn {
    background-color: #0088cc;
}

.telegram-btn:hover {
    background-color: #006699;
}

.qr-result {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 20px;
    margin-bottom: 20px;
}

.form-group input[type="file"]::before {
    content: 'Выберите файл';
    display: inline-block;
    background: #007bff;
    color: white;
    padding: 8px 12px;
    outline: none;
    cursor: pointer;
    font-weight: 700;
    border-radius: 8px;
    transition: background-color 0.3s;
}

.form-group input[type="file"]:hover::before {
    background-color: #0056b3;
}

#scanArea {
    position: relative;
    overflow: hidden;
}

.scanner-line {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background-color: rgba(0, 255, 0, 0.7); /* Цвет линии сканирования */
    animation: scan 2s linear infinite;
}

@keyframes scan {
    0% {
        top: 0;
    }
    100% {
        top: 100%;
    }
}


#scanResult,
h2,
.drop-area p {
    color: #000000; /* Черный цвет текста */
    text-align: center; /* Выравнивание текста по центру */
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3); /* Небольшая тень для 3D эффекта */
    font-weight: bold; /* Чтобы текст выглядел четче */
}


/* Существующие стили */

.nav-icon {
    width: 24px;
    height: 24px;
    fill: currentColor;
    margin-bottom: 4px;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: #333;
}

.nav-item.active {
    color: #007bff;
}