* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #c41e3a 0%, #8b1538 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px 40px 40px 40px;
    box-shadow: 0 20px 40px rgba(196, 30, 58, 0.15);
    max-width: 600px;
    width: 100%;
    text-align: center;
    border: 1px solid rgba(196, 30, 58, 0.1);
}

h1 {
    color: #c41e3a;
    margin-bottom: 10px;
    font-size: 2.5em;
    font-weight: 700;
    margin-top: 0;
}

.subtitle {
    color: #666;
    margin-bottom: 40px;
    font-size: 1.1em;
}

.upload-area {
    border: 3px dashed #ddd;
    border-radius: 15px;
    padding: 60px 20px;
    margin-bottom: 0;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.upload-area:hover {
    border-color: #c41e3a;
    background: rgba(196, 30, 58, 0.05);
    transform: translateY(-2px);
}

.upload-area.dragover {
    border-color: #c41e3a;
    background: rgba(196, 30, 58, 0.1);
    transform: scale(1.02);
}

.upload-icon {
    margin-bottom: 20px;
    transition: all 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
}

.upload-icon svg {
    width: 80px;
    height: 80px;
    fill: #ddd;
    transition: all 0.3s ease;
}

.upload-area:hover .upload-icon svg {
    fill: #c41e3a;
    transform: scale(1.1);
}

.upload-text {
    color: #666;
    font-size: 1.2em;
    font-weight: 500;
}

#fileInput {
    display: none;
}

.result-area {
    margin-top: 0;
    margin-bottom: 0;
    padding: 0;
    display: none;
}

.result-area.show {
    display: block;
    animation: slideIn 0.5s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.secret-display {
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.secret-value {
    font-family: 'SF Mono', 'Monaco', 'Cascadia Code', 'Roboto Mono', monospace;
    background: white;
    padding: 18px 20px;
    border-radius: 8px;
    border: 1px solid #dee2e6;
    word-break: break-all;
    font-size: 1em;
    color: #212529;
    line-height: 1.5;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: all !important;
    -webkit-user-select: all !important;
    -moz-user-select: all !important;
    -ms-user-select: all !important;
}

.secret-value:hover {
    border-color: #c41e3a;
    box-shadow: 0 2px 8px rgba(196, 30, 58, 0.15);
}

.copy-btn {
    background: #c41e3a;
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.9em;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    width: 100%;
    position: relative;
    overflow: hidden;
}

.copy-btn:hover {
    background: #a91b32;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(196, 30, 58, 0.3);
}

.copy-btn:active {
    transform: translateY(0);
}

.copy-btn.copied {
    background: #28a745;
    transform: scale(1.05);
}

.copy-btn.copied::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: shine 0.6s ease-in-out;
}

@keyframes shine {
    0% { left: -100%; }
    100% { left: 100%; }
}

.error {
    color: #dc3545;
    background: rgba(220, 53, 69, 0.1);
    padding: 20px;
    border-radius: 10px;
    margin-top: 20px;
    border: 1px solid rgba(220, 53, 69, 0.2);
}

.success {
    color: #28a745;
    background: rgba(40, 167, 69, 0.1);
    padding: 15px;
    border-radius: 8px;
    margin-top: 10px;
    border: 1px solid rgba(40, 167, 69, 0.2);
}

.loading {
    display: none;
    margin-top: 20px;
}

.spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #c41e3a;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.preview-image {
    max-width: 200px;
    max-height: 200px;
    border-radius: 10px;
    margin: 20px auto;
    border: 2px solid #e0e0e0;
    display: none;
}

.preview-image.show {
    display: block;
}