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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 600px;
}

.card {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.header {
    text-align: center;
    margin-bottom: 30px;
}

.icon {
    font-size: 60px;
    margin-bottom: 15px;
    animation: rotate 2s ease-in-out infinite;
}

@keyframes rotate {
    0%, 100% { transform: rotate(0deg); }
    25% { transform: rotate(-10deg); }
    75% { transform: rotate(10deg); }
}

.header h1 {
    color: #333;
    font-size: 32px;
    margin-bottom: 10px;
    font-weight: 700;
}

.subtitle {
    color: #666;
    font-size: 16px;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    color: #333;
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 14px;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-wrapper input {
    flex: 1;
}

input[type="text"],
input[type="password"],
input[type="email"],
select {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 15px;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

input:focus,
select:focus {
    outline: none;
    border-color: #667eea;
    background: white;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.toggle-visibility {
    position: absolute;
    right: 12px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 20px;
    padding: 5px;
    transition: transform 0.2s;
}

.toggle-visibility:hover {
    transform: scale(1.1);
}

.metadata-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 10px;
}

.meta-input {
    padding: 12px;
    font-size: 14px;
}

.btn-encrypt {
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 10px;
}

.btn-encrypt:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
}

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

.loader {
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top: 3px solid white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
}

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

.result {
    margin-top: 30px;
    padding: 25px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    border-radius: 15px;
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.result-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.success-icon {
    font-size: 32px;
}

.result-header h3 {
    color: #27ae60;
    font-size: 22px;
}

.token-container {
    margin-bottom: 20px;
}

.token-container label {
    display: block;
    color: #555;
    font-weight: 600;
    margin-bottom: 10px;
    font-size: 14px;
}

.token-display {
    background: white;
    padding: 15px;
    border-radius: 10px;
    word-break: break-all;
    font-family: 'Courier New', monospace;
    font-size: 13px;
    color: #333;
    max-height: 150px;
    overflow-y: auto;
    border: 2px solid #e0e0e0;
    margin-bottom: 12px;
}

.btn-copy {
    width: 100%;
    padding: 12px;
    background: #27ae60;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-copy:hover {
    background: #229954;
    transform: translateY(-1px);
}

.btn-copy:active {
    transform: scale(0.98);
}

.info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-top: 15px;
}

.info-item {
    background: white;
    padding: 15px;
    border-radius: 10px;
    text-align: center;
}

.info-label {
    display: block;
    color: #888;
    font-size: 12px;
    margin-bottom: 5px;
    text-transform: uppercase;
    font-weight: 600;
}

.info-value {
    display: block;
    color: #333;
    font-size: 16px;
    font-weight: 700;
}

.error {
    margin-top: 20px;
    padding: 15px;
    background: #ffe6e6;
    border-left: 4px solid #e74c3c;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: shake 0.5s ease-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

.error-icon {
    font-size: 24px;
}

.error span:last-child {
    color: #c0392b;
    font-weight: 500;
}

footer {
    text-align: center;
    margin-top: 30px;
    color: white;
    font-size: 14px;
    opacity: 0.9;
}

@media (max-width: 600px) {
    .card {
        padding: 25px;
    }

    .header h1 {
        font-size: 26px;
    }

    .icon {
        font-size: 50px;
    }

    .metadata-inputs {
        grid-template-columns: 1fr;
    }

    .info-grid {
        grid-template-columns: 1fr;
    }
}