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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding: 20px;
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 24px;
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: 
        0 25px 50px rgba(0, 0, 0, 0.15),
        0 0 0 1px rgba(255, 255, 255, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    position: relative;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    margin-bottom: 20px;
    z-index: 1;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
    border-radius: 24px;
    pointer-events: none;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 
        0 35px 70px rgba(0, 0, 0, 0.2),
        0 0 0 1px rgba(255, 255, 255, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

h2, h3 {
    color: white;
    font-size: 28px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 30px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    position: relative;
    z-index: 1;
}

h3 {
    font-size: 24px;
    margin-bottom: 20px;
}

form {
    position: relative;
    z-index: 1;
}

label {
    display: block;
    color: rgba(255, 255, 255, 0.9);
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 12px;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 14px;
    margin-bottom: 10px;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
    word-break: break-all;
    position: relative;
    z-index: 1;
}

p b {
    color: white;
    font-weight: 600;
}

input[type="file"] {
    width: 100%;
    padding: 16px 20px;
    border: 2px dashed rgba(255, 255, 255, 0.3);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: white;
    font-size: 16px;
    font-family: inherit;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    position: relative;
    margin-bottom: 24px;
}

input[type="file"]:hover {
    border-color: rgba(255, 255, 255, 0.5);
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

input[type="file"]:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.6);
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.1);
}

input[type="file"]::file-selector-button {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 12px;
    padding: 8px 16px;
    color: white;
    font-weight: 500;
    margin-right: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

input[type="file"]::file-selector-button:hover {
    background: rgba(255, 255, 255, 0.3);
}

input[type="number"], input[type="text"] {
    width: 100%;
    padding: 16px 20px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: white;
    font-size: 16px;
    font-family: inherit;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    margin-bottom: 20px;
}

input[type="number"]:focus, input[type="text"]:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.6);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.1);
}

input[type="number"]::placeholder, input[type="text"]::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

textarea {
    width: 100%;
    padding: 16px 20px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: white;
    font-size: 14px;
    font-family: 'Courier New', monospace;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    margin-bottom: 20px;
    resize: vertical;
    min-height: 120px;
}

textarea:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.6);
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.1);
}

button {
    width: 100%;
    padding: 16px 24px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, rgba(255, 255, 255, 0.1) 100%);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 16px;
    color: white;
    font-size: 18px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
}

button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

button:hover {
    transform: translateY(-2px);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.3) 0%, rgba(255, 255, 255, 0.2) 100%);
    border-color: rgba(255, 255, 255, 0.5);
    box-shadow: 
        0 15px 30px rgba(0, 0, 0, 0.2),
        0 0 0 1px rgba(255, 255, 255, 0.1);
}

button:hover::before {
    left: 100%;
}

button:active {
    transform: translateY(0);
}

.qr-img {
    margin-top: 20px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.qr-img img {
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    background: white;
    padding: 10px;
}

.spinner {
    width: 48px;
    height: 48px;
    margin: 10px auto;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.error {
    color: #ff6b6b;
    background: rgba(255, 107, 107, 0.1);
    border: 1px solid rgba(255, 107, 107, 0.3);
    border-radius: 12px;
    padding: 15px;
    text-align: center;
    margin: 20px 0;
}

/* Responsive Design */
@media (max-width: 480px) {
    body {
        padding: 10px;
    }

    .card {
        padding: 30px 20px;
        margin: 10px 0;
    }

    h2 {
        font-size: 24px;
    }

    h3 {
        font-size: 20px;
    }

    input[type="file"], 
    input[type="number"], 
    input[type="text"], 
    textarea, 
    button {
        padding: 14px 18px;
        font-size: 16px;
    }

    p {
        font-size: 13px;
    }
}

/* Loading Animation */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.loading {
    animation: pulse 2s infinite;
}

/* Success state styling */
.success {
    border-color: rgba(76, 175, 80, 0.5) !important;
    background: rgba(76, 175, 80, 0.1) !important;
}

/* Copy button styling */
.copy-btn {
    background: rgba(52, 152, 219, 0.2);
    border: 1px solid rgba(52, 152, 219, 0.3);
    padding: 8px 16px;
    font-size: 14px;
    margin-top: 10px;
    width: auto;
    display: inline-block;
}

.copy-btn:hover {
    background: rgba(52, 152, 219, 0.3);
    border-color: rgba(52, 152, 219, 0.5);
}

/* Floating particles */
@keyframes float {
    to {
        transform: translateY(-100vh) rotate(360deg);
        opacity: 0;
    }
}

.particle {
    position: fixed;
    width: 4px;
    height: 4px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    pointer-events: none;
    animation: float 6s linear infinite;
    z-index: 0;
}