* {
    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;
    color: #333;
}

.container {
    background: rgba(255, 255, 255, 0.95);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    max-width: 450px;
    width: 90%;
    text-align: center;
    transition: transform 0.3s ease;
}

.container:hover {
    transform: translateY(-5px);
}

.logo {
    font-size: 2.5rem;
    font-weight: bold;
    color: #667eea;
    margin-bottom: 1rem;
}

.step-indicator {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
}

.step {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #e0e0e0;
    margin: 0 8px;
    transition: all 0.3s ease;
}

.step.active {
    background: #667eea;
    transform: scale(1.2);
}

.step.completed {
    background: #4CAF50;
}

h1 {
    color: #333;
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
}

.form-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: #555;
    font-weight: 500;
}

input[type="email"], input[type="text"] {
    width: 100%;
    padding: 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

input[type="email"]:focus, input[type="text"]:focus {
    outline: none;
    border-color: #667eea;
    background: white;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.pin-input {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin: 1rem 0;
}

.pin-digit {
    width: 60px;
    height: 60px;
    text-align: center;
    font-size: 1.5rem;
    font-weight: bold;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    background: #f8f9fa;
    transition: all 0.3s ease;
}

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

.btn {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.btn:disabled {
    background: #ccc;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.error {
    color: #e74c3c;
    margin-top: 1rem;
    padding: 0.8rem;
    background: rgba(231, 76, 60, 0.1);
    border-radius: 8px;
    border-left: 4px solid #e74c3c;
}

.success {
    color: #27ae60;
    margin-top: 1rem;
    padding: 0.8rem;
    background: rgba(39, 174, 96, 0.1);
    border-radius: 8px;
    border-left: 4px solid #27ae60;
}

.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid #ffffff;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 1s ease-in-out infinite;
    margin-right: 10px;
}

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

.final-code {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 15px;
    margin: 1.5rem 0;
    border: 2px dashed #667eea;
}

.final-code h2 {
    color: #667eea;
    margin-bottom: 1rem;
}

.code-display {
    font-family: 'Courier New', monospace;
    font-size: 2rem;
    font-weight: bold;
    color: #333;
    letter-spacing: 4px;
    margin: 1rem 0;
}

.hidden {
    display: none;
}

.info {
    background: rgba(52, 152, 219, 0.1);
    color: #2980b9;
    padding: 1rem;
    border-radius: 8px;
    margin: 1rem 0;
    border-left: 4px solid #3498db;
}