* {
    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 {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    padding: 40px;
    max-width: 450px;
    width: 100%;
}

.header {
    text-align: center;
    margin-bottom: 35px;
}

.icon-wrapper {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

.icon-wrapper svg {
    width: 35px;
    height: 35px;
    fill: white;
}

h1 {
    color: #2d3748;
    font-size: 28px;
    margin-bottom: 10px;
    font-weight: 600;
}

.description {
    color: #718096;
    font-size: 14px;
    line-height: 1.6;
}

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

.user-label {
    display: block;
    color: #2d3748;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
}

.input-wrapper {
    position: relative;
}

.user-input {
    width: 100%;
    padding: 14px 14px 14px 45px;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 15px;
    transition: all 0.3s ease;
    outline: none;
    color: #2d3748;
}

.user-input::placeholder{
    color: #cbd5e0;
}

.user-input:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.user-input.error {
    border-color: #fc8181;
}

.user-input.success {
    border-color: #68d391;
}

.icon-left {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 12px;
    color: #a0aec0;
}

.error-message {
    color: #fc8181;
    font-size: 12px;
    margin-top: 6px;
    display: none;
    align-items: center;
    gap: 5px;
}

.error-message.show {
    display: flex;
}

.info-box {
    background: #f0f4ff;
    border-left: 4px solid #667eea;
    border-radius: 8px;
    padding: 15px;
    margin-bottom: 25px;
}

.info-box p {
    font-size: 13px;
    color: #4a5568;
    line-height: 1.6;
}

button {
    width: 100%;
    padding: 14px;
    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;
    margin-top: 20px;
}

button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
}

button:active:not(:disabled) {
    transform: translateY(0);
}

button:disabled {
    background: #cbd5e0;
    cursor: not-allowed;
    transform: none;
}

.back-link {
    text-align: center;
    margin-top: 20px;
}

.back-link a {
    color: #667eea;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.back-link a:hover {
    color: #764ba2;
    text-decoration: underline;
}

@keyframes shake {
    0%, 100% {
        transform: translateX(0);
    }
    25% {
        transform: translateX(-8px);
    }
    75% {
        transform: translateX(8px);
    }
}

.shake {
    animation: shake 0.4s;
}